diff --git a/frontend/public/locales/en-GB/translation.json b/frontend/public/locales/en-GB/translation.json
index ed543d01f..df5a96a3d 100644
--- a/frontend/public/locales/en-GB/translation.json
+++ b/frontend/public/locales/en-GB/translation.json
@@ -197,6 +197,7 @@
   },
   "edit": "Edit",
   "delete": "Delete",
+  "never": "Never",
   "username": "Username",
   "password": "Password",
   "welcome": "Welcome",
@@ -4940,7 +4941,8 @@
     "done": "Done",
     "loading": "Loading...",
     "back": "Back",
-    "continue": "Continue"
+    "continue": "Continue",
+    "error": "Error"
   },
   "config": {
     "overview": {
@@ -5368,9 +5370,12 @@
     "featureComparison": "Feature Comparison",
     "from": "From",
     "perMonth": "/month",
+    "perSeat": "/seat",
+    "withServer": "+ Server Plan",
     "licensedSeats": "Licensed: {{count}} seats",
     "includedInCurrent": "Included in Your Plan",
     "selectPlan": "Select Plan",
+    "manage": "Manage",
     "manageSubscription": {
       "description": "Manage your subscription, billing, and payment methods"
     },
@@ -5412,7 +5417,9 @@
       "name": "Enterprise",
       "highlight1": "Custom pricing",
       "highlight2": "Dedicated support",
-      "highlight3": "Latest features"
+      "highlight3": "Latest features",
+      "requiresServer": "Requires Server",
+      "requiresServerMessage": "Please upgrade to the Server plan first before upgrading to Enterprise."
     },
     "feature": {
       "title": "Feature",
@@ -5440,7 +5447,24 @@
     "manageBilling": "Manage Billing",
     "portal": {
       "error": "Failed to open billing portal"
-    }
+    },
+    "updateSeats": "Update Seats",
+    "updateEnterpriseSeats": "Update Enterprise Seats",
+    "currentSeats": "Current Seats",
+    "minimumSeats": "Minimum Seats",
+    "basedOnUsers": "(current users)",
+    "newSeatCount": "New Seat Count",
+    "newSeatCountDescription": "Select the number of seats for your enterprise licence",
+    "whatHappensNext": "What happens next?",
+    "stripePortalRedirect": "You will be redirected to Stripe's billing portal to review and confirm the seat change. The prorated amount will be calculated automatically.",
+    "preparingUpdate": "Preparing seat update...",
+    "seatCountTooLow": "Seat count must be at least {{minimum}} (current number of users)",
+    "seatCountUnchanged": "Please select a different seat count",
+    "seatsUpdated": "Seats Updated",
+    "seatsUpdatedMessage": "Your enterprise seats have been updated to {{seats}}",
+    "updateProcessing": "Update Processing",
+    "updateProcessingMessage": "Your seat update is being processed. Please refresh in a few moments.",
+    "notEnterprise": "Seat management is only available for enterprise licences"
   },
   "upgradeBanner": {
     "title": "Upgrade to Server Plan",
@@ -5476,10 +5500,39 @@
     "enterpriseNote": "Seats can be adjusted in checkout (1-1000).",
     "installationId": "Installation ID",
     "licenseKey": "Your License Key",
-    "licenseInstructions": "Enter this key in Settings → Admin Plan → License Key section",
+    "licenseInstructions": "This has been added to your installation. You will receive a copy in your email as well.",
     "canCloseWindow": "You can now close this window.",
     "licenseKeyProcessing": "License Key Processing",
-    "licenseDelayedMessage": "Your license key is being generated. Please check your email shortly or contact support."
+    "licenseDelayedMessage": "Your license key is being generated. Please check your email shortly or contact support.",
+    "perYear": "/year",
+    "perMonth": "/month",
+    "emailInvalid": "Please enter a valid email address",
+    "emailStage": {
+      "title": "Enter Your Email",
+      "description": "We'll use this to send your license key and receipts.",
+      "emailLabel": "Email Address",
+      "emailPlaceholder": "your@email.com",
+      "continue": "Continue",
+      "modalTitle": "Get Started - {{planName}}"
+    },
+    "planStage": {
+      "title": "Choose Your Billing Period",
+      "savingsNote": "Save {{percent}}% with annual billing",
+      "basePrice": "Base Price",
+      "seatPrice": "Per Seat",
+      "totalForSeats": "Total ({{count}} seats)",
+      "selectMonthly": "Select Monthly",
+      "selectYearly": "Select Yearly",
+      "savePercent": "Save {{percent}}%",
+      "savingsAmount": "You save {{amount}}",
+      "modalTitle": "Select Billing Period - {{planName}}",
+      "billedYearly": "Billed yearly at {{currency}}{{amount}}"
+    },
+    "paymentStage": {
+      "backToPlan": "Back to Plan Selection",
+      "selectedPlan": "Selected Plan",
+      "modalTitle": "Complete Payment - {{planName}}"
+    }
   },
   "firstLogin": {
     "title": "First Time Login",
diff --git a/frontend/src/proprietary/components/AppProviders.tsx b/frontend/src/proprietary/components/AppProviders.tsx
index b865e4f26..00964a866 100644
--- a/frontend/src/proprietary/components/AppProviders.tsx
+++ b/frontend/src/proprietary/components/AppProviders.tsx
@@ -2,6 +2,7 @@ import { AppProviders as CoreAppProviders, AppProvidersProps } from "@core/compo
 import { AuthProvider } from "@app/auth/UseSession";
 import { LicenseProvider } from "@app/contexts/LicenseContext";
 import { CheckoutProvider } from "@app/contexts/CheckoutContext";
+import { UpdateSeatsProvider } from "@app/contexts/UpdateSeatsContext";
 import UpgradeBanner from "@app/components/shared/UpgradeBanner";
 
 export function AppProviders({ children, appConfigRetryOptions, appConfigProviderProps }: AppProvidersProps) {
@@ -13,8 +14,10 @@ export function AppProviders({ children, appConfigRetryOptions, appConfigProvide
       <AuthProvider>
         <LicenseProvider>
           <CheckoutProvider>
-            <UpgradeBanner />
-            {children}
+            <UpdateSeatsProvider>
+              <UpgradeBanner />
+              {children}
+            </UpdateSeatsProvider>
           </CheckoutProvider>
         </LicenseProvider>
       </AuthProvider>
diff --git a/frontend/src/proprietary/components/shared/StripeCheckout.tsx b/frontend/src/proprietary/components/shared/StripeCheckout.tsx
deleted file mode 100644
index 6018dcafc..000000000
--- a/frontend/src/proprietary/components/shared/StripeCheckout.tsx
+++ /dev/null
@@ -1,507 +0,0 @@
-import React, { useState, useEffect, useCallback } from 'react';
-import { Modal, Button, Text, Alert, Loader, Stack, Group, Paper, SegmentedControl, Grid, Code } from '@mantine/core';
-import { useTranslation } from 'react-i18next';
-import { loadStripe } from '@stripe/stripe-js';
-import { EmbeddedCheckoutProvider, EmbeddedCheckout } from '@stripe/react-stripe-js';
-import licenseService, { PlanTierGroup } from '@app/services/licenseService';
-import { Z_INDEX_OVER_CONFIG_MODAL } from '@app/styles/zIndex';
-import { pollLicenseKeyWithBackoff, activateLicenseKey, resyncExistingLicense } from '@app/utils/licenseCheckoutUtils';
-
-// Validate Stripe key (static validation, no dynamic imports)
-const STRIPE_KEY = import.meta.env.VITE_STRIPE_PUBLISHABLE_KEY;
-
-if (!STRIPE_KEY) {
-  console.error(
-    'VITE_STRIPE_PUBLISHABLE_KEY environment variable is required. ' +
-    'Please add it to your .env file. ' +
-    'Get your key from https://dashboard.stripe.com/apikeys'
-  );
-}
-
-if (STRIPE_KEY && !STRIPE_KEY.startsWith('pk_')) {
-  console.error(
-    `Invalid Stripe publishable key format. ` +
-    `Expected key starting with 'pk_', got: ${STRIPE_KEY.substring(0, 10)}...`
-  );
-}
-
-const stripePromise = STRIPE_KEY ? loadStripe(STRIPE_KEY) : null;
-
-interface StripeCheckoutProps {
-  opened: boolean;
-  onClose: () => void;
-  planGroup: PlanTierGroup;
-  minimumSeats?: number;
-  onSuccess?: (sessionId: string) => void;
-  onError?: (error: string) => void;
-  onLicenseActivated?: (licenseInfo: {licenseType: string; enabled: boolean; maxUsers: number; hasKey: boolean}) => void;
-  hostedCheckoutSuccess?: {
-    isUpgrade: boolean;
-    licenseKey?: string;
-  } | null;
-}
-
-type CheckoutState = {
-  status: 'idle' | 'loading' | 'ready' | 'success' | 'error';
-  clientSecret?: string;
-  error?: string;
-  sessionId?: string;
-};
-
-const StripeCheckout: React.FC<StripeCheckoutProps> = ({
-  opened,
-  onClose,
-  planGroup,
-  minimumSeats = 1,
-  onSuccess,
-  onError,
-  onLicenseActivated,
-  hostedCheckoutSuccess,
-}) => {
-  const { t } = useTranslation();
-  const [state, setState] = useState<CheckoutState>({ status: 'idle' });
-  // Default to yearly if available (better value), otherwise monthly
-  const [selectedPeriod, setSelectedPeriod] = useState<'monthly' | 'yearly'>(
-    planGroup.yearly ? 'yearly' : 'monthly'
-  );
-  const [installationId, setInstallationId] = useState<string | null>(null);
-  const [currentLicenseKey, setCurrentLicenseKey] = useState<string | null>(null);
-  const [licenseKey, setLicenseKey] = useState<string | null>(null);
-  const [pollingStatus, setPollingStatus] = useState<'idle' | 'polling' | 'ready' | 'timeout'>('idle');
-
-  // Refs for polling cleanup
-  const isMountedRef = React.useRef(true);
-  const pollingTimeoutRef = React.useRef<NodeJS.Timeout | null>(null);
-
-  // Get the selected plan based on period
-  const selectedPlan = selectedPeriod === 'yearly' ? planGroup.yearly : planGroup.monthly;
-
-  const createCheckoutSession = async () => {
-    if (!selectedPlan) {
-      setState({
-        status: 'error',
-        error: 'Selected plan period is not available',
-      });
-      return;
-    }
-
-    try {
-      setState({ status: 'loading' });
-
-      // Fetch installation ID from backend
-      let fetchedInstallationId = installationId;
-      if (!fetchedInstallationId) {
-        fetchedInstallationId = await licenseService.getInstallationId();
-        setInstallationId(fetchedInstallationId);
-      }
-
-      // Fetch current license key for upgrades
-      let existingLicenseKey: string | undefined;
-      try {
-        const licenseInfo = await licenseService.getLicenseInfo();
-        if (licenseInfo && licenseInfo.licenseKey) {
-          existingLicenseKey = licenseInfo.licenseKey;
-          setCurrentLicenseKey(existingLicenseKey);
-          console.log('Found existing license for upgrade');
-        }
-      } catch (error) {
-        console.warn('Could not fetch license info, proceeding as new license:', error);
-      }
-
-      const response = await licenseService.createCheckoutSession({
-        lookup_key: selectedPlan.lookupKey,
-        installation_id: fetchedInstallationId,
-        current_license_key: existingLicenseKey,
-        requires_seats: selectedPlan.requiresSeats,
-        seat_count: Math.max(1, Math.min(minimumSeats || 1, 10000)),
-      });
-
-      // Check if we got a redirect URL (hosted checkout for HTTP)
-      if (response.url) {
-        console.log('Redirecting to Stripe hosted checkout:', response.url);
-        // Redirect to Stripe's hosted checkout page
-        window.location.href = response.url;
-        return;
-      }
-
-      // Otherwise, use embedded checkout (HTTPS)
-      setState({
-        status: 'ready',
-        clientSecret: response.clientSecret,
-        sessionId: response.sessionId,
-      });
-    } catch (err) {
-      const errorMessage =
-        err instanceof Error ? err.message : 'Failed to create checkout session';
-      setState({
-        status: 'error',
-        error: errorMessage,
-      });
-      onError?.(errorMessage);
-    }
-  };
-
-  const pollForLicenseKey = useCallback(async (installId: string) => {
-    // Use shared polling utility
-    const result = await pollLicenseKeyWithBackoff(installId, {
-      isMounted: () => isMountedRef.current,
-      onStatusChange: setPollingStatus,
-    });
-
-    if (result.success && result.licenseKey) {
-      setLicenseKey(result.licenseKey);
-
-      // Activate the license key
-      const activation = await activateLicenseKey(result.licenseKey, {
-        isMounted: () => isMountedRef.current,
-        onActivated: onLicenseActivated,
-      });
-
-      if (!activation.success) {
-        console.error('Failed to activate license key:', activation.error);
-      }
-    } else if (result.timedOut) {
-      console.warn('License key polling timed out');
-    } else if (result.error) {
-      console.error('License key polling failed:', result.error);
-    }
-  }, [onLicenseActivated]);
-
-  const handlePaymentComplete = async () => {
-    // Preserve state when changing status
-    setState(prev => ({ ...prev, status: 'success' }));
-
-    // Check if this is an upgrade (existing license key) or new plan
-    if (currentLicenseKey) {
-      // UPGRADE FLOW: Resync existing license with Keygen
-      console.log('Upgrade detected - resyncing existing license with Keygen');
-      setPollingStatus('polling');
-
-      const activation = await resyncExistingLicense({
-        isMounted: () => true, // Modal is open, no need to check
-        onActivated: onLicenseActivated,
-      });
-
-      if (activation.success) {
-        console.log(`License upgraded successfully: ${activation.licenseType}`);
-        setPollingStatus('ready');
-      } else {
-        console.error('Failed to sync upgraded license:', activation.error);
-        setPollingStatus('timeout');
-      }
-
-      // Notify parent (don't wait - upgrade is complete)
-      onSuccess?.(state.sessionId || '');
-    } else {
-      // NEW PLAN FLOW: Poll for new license key
-      console.log('New subscription - polling for license key');
-
-      if (installationId) {
-        pollForLicenseKey(installationId).finally(() => {
-          // Only notify parent after polling completes or times out
-          onSuccess?.(state.sessionId || '');
-        });
-      } else {
-        // No installation ID, notify immediately
-        onSuccess?.(state.sessionId || '');
-      }
-    }
-  };
-
-  const handleClose = () => {
-    // Clear any active polling
-    if (pollingTimeoutRef.current) {
-      clearTimeout(pollingTimeoutRef.current);
-      pollingTimeoutRef.current = null;
-    }
-
-    setState({ status: 'idle' });
-    setPollingStatus('idle');
-    setCurrentLicenseKey(null);
-    setLicenseKey(null);
-    // Reset to default period on close
-    setSelectedPeriod(planGroup.yearly ? 'yearly' : 'monthly');
-    onClose();
-  };
-
-  const handlePeriodChange = (value: string) => {
-    setSelectedPeriod(value as 'monthly' | 'yearly');
-    // Reset state to trigger checkout reload
-    setState({ status: 'idle' });
-  };
-
-  // Cleanup on unmount
-  useEffect(() => {
-    isMountedRef.current = true;
-
-    return () => {
-      isMountedRef.current = false;
-      if (pollingTimeoutRef.current) {
-        clearTimeout(pollingTimeoutRef.current);
-        pollingTimeoutRef.current = null;
-      }
-    };
-  }, []);
-
-  // Handle hosted checkout success - open directly to success state
-  useEffect(() => {
-    if (opened && hostedCheckoutSuccess) {
-      console.log('Opening modal to success state for hosted checkout return');
-
-      // Set appropriate state based on upgrade vs new subscription
-      if (hostedCheckoutSuccess.isUpgrade) {
-        setCurrentLicenseKey('existing'); // Flag to indicate upgrade
-        setPollingStatus('ready');
-      } else if (hostedCheckoutSuccess.licenseKey) {
-        setLicenseKey(hostedCheckoutSuccess.licenseKey);
-        setPollingStatus('ready');
-      }
-
-      // Set to success state to show success UI
-      setState({ status: 'success' });
-    }
-  }, [opened, hostedCheckoutSuccess]);
-
-  // Initialize checkout when modal opens or period changes
-  useEffect(() => {
-    // Don't reset if we're showing success state (license key)
-    if (state.status === 'success') {
-      return;
-    }
-
-    // Skip initialization if opening for hosted checkout success
-    if (hostedCheckoutSuccess) {
-      return;
-    }
-
-    if (opened && state.status === 'idle') {
-      createCheckoutSession();
-    } else if (!opened) {
-      setState({ status: 'idle' });
-    }
-  }, [opened, selectedPeriod, state.status, hostedCheckoutSuccess]);
-
-  const renderContent = () => {
-    // Check if Stripe is configured
-    if (!stripePromise) {
-      return (
-        <Alert color="red" title={t('payment.stripeNotConfigured', 'Stripe Not Configured')}>
-          <Stack gap="md">
-            <Text size="sm">
-              {t(
-                'payment.stripeNotConfiguredMessage',
-                'Stripe payment integration is not configured. Please contact your administrator.'
-              )}
-            </Text>
-            <Button variant="outline" onClick={handleClose}>
-              {t('common.close', 'Close')}
-            </Button>
-          </Stack>
-        </Alert>
-      );
-    }
-
-    switch (state.status) {
-      case 'loading':
-        return (
-          <Stack align="center" justify="center" style={{ padding: '2rem 0' }}>
-            <Loader size="lg" />
-            <Text size="sm" c="dimmed" mt="md">
-              {t('payment.preparing', 'Preparing your checkout...')}
-            </Text>
-          </Stack>
-        );
-
-      case 'ready':
-        {
-        if (!state.clientSecret || !selectedPlan) return null;
-
-        // Build period selector data with prices
-        const periodData = [];
-        if (planGroup.monthly) {
-          const monthlyPrice = planGroup.monthly.requiresSeats && planGroup.monthly.seatPrice
-            ? `${planGroup.monthly.currency}${planGroup.monthly.price.toFixed(2)}${planGroup.monthly.period} + ${planGroup.monthly.currency}${planGroup.monthly.seatPrice.toFixed(2)}/seat`
-            : `${planGroup.monthly.currency}${planGroup.monthly.price.toFixed(2)}${planGroup.monthly.period}`;
-
-          periodData.push({
-            value: 'monthly',
-            label: `${t('payment.monthly', 'Monthly')} - ${monthlyPrice}`,
-          });
-        }
-        if (planGroup.yearly) {
-          const yearlyPrice = planGroup.yearly.requiresSeats && planGroup.yearly.seatPrice
-            ? `${planGroup.yearly.currency}${planGroup.yearly.price.toFixed(2)}${planGroup.yearly.period} + ${planGroup.yearly.currency}${planGroup.yearly.seatPrice.toFixed(2)}/seat`
-            : `${planGroup.yearly.currency}${planGroup.yearly.price.toFixed(2)}${planGroup.yearly.period}`;
-
-          periodData.push({
-            value: 'yearly',
-            label: `${t('payment.yearly', 'Yearly')} - ${yearlyPrice}`,
-          });
-        }
-
-        return (
-          <Grid gutter="md">
-            {/* Left: Period Selector - only show if both periods available */}
-            {periodData.length > 1 && (
-              <Grid.Col span={3}>
-                <Stack gap="sm" style={{ height: '100%' }}>
-                  <Text size="sm" fw={600}>
-                    {t('payment.billingPeriod', 'Billing Period')}
-                  </Text>
-                  <SegmentedControl
-                    value={selectedPeriod}
-                    onChange={handlePeriodChange}
-                    data={periodData}
-                    orientation="vertical"
-                    fullWidth
-                  />
-                  {selectedPlan.requiresSeats && selectedPlan.seatPrice && (
-                    <Text size="xs" c="dimmed" mt="md">
-                      {t('payment.enterpriseNote', 'Seats can be adjusted in checkout (1-1000).')}
-                    </Text>
-                  )}
-                </Stack>
-              </Grid.Col>
-            )}
-
-            {/* Right: Stripe Checkout */}
-            <Grid.Col span={periodData.length > 1 ? 9 : 12}>
-              <EmbeddedCheckoutProvider
-                key={state.clientSecret}
-                stripe={stripePromise}
-                options={{
-                  clientSecret: state.clientSecret,
-                  onComplete: handlePaymentComplete,
-                }}
-              >
-                <EmbeddedCheckout />
-              </EmbeddedCheckoutProvider>
-            </Grid.Col>
-          </Grid>
-        );
-      }
-      case 'success':
-        return (
-          <Alert color="green" title={t('payment.success', 'Payment Successful!')}>
-            <Stack gap="md">
-              <Text size="sm">
-                {t(
-                  'payment.successMessage',
-                  'Your subscription has been activated successfully.'
-                )}
-              </Text>
-
-              {/* License Key Polling Status */}
-              {pollingStatus === 'polling' && (
-                <Group gap="xs">
-                  <Loader size="sm" />
-                  <Text size="sm" c="dimmed">
-                    {currentLicenseKey
-                      ? t('payment.syncingLicense', 'Syncing your upgraded license...')
-                      : t('payment.generatingLicense', 'Generating your license key...')}
-                  </Text>
-                </Group>
-              )}
-
-              {pollingStatus === 'ready' && !currentLicenseKey && licenseKey && (
-                <Paper withBorder p="md" radius="md" bg="gray.1">
-                  <Stack gap="sm">
-                    <Text size="sm" fw={600}>
-                      {t('payment.licenseKey', 'Your License Key')}
-                    </Text>
-                    <Code block>{licenseKey}</Code>
-                    <Button
-                      variant="light"
-                      size="sm"
-                      onClick={() => navigator.clipboard.writeText(licenseKey)}
-                    >
-                      {t('common.copy', 'Copy to Clipboard')}
-                    </Button>
-                    <Text size="xs" c="dimmed">
-                      {t(
-                        'payment.licenseInstructions',
-                        'Enter this key in Settings → Admin Plan → License Key section'
-                      )}
-                    </Text>
-                  </Stack>
-                </Paper>
-              )}
-
-              {pollingStatus === 'ready' && currentLicenseKey && (
-                <Alert color="green" title={t('payment.upgradeComplete', 'Upgrade Complete')}>
-                  <Text size="sm">
-                    {t(
-                      'payment.upgradeCompleteMessage',
-                      'Your subscription has been upgraded successfully. Your existing license key has been updated.'
-                    )}
-                  </Text>
-                </Alert>
-              )}
-
-              {pollingStatus === 'timeout' && (
-                <Alert color="yellow" title={t('payment.licenseDelayed', 'License Key Processing')}>
-                  <Text size="sm">
-                    {t(
-                      'payment.licenseDelayedMessage',
-                      'Your license key is being generated. Please check your email shortly or contact support.'
-                    )}
-                  </Text>
-                </Alert>
-              )}
-
-              {pollingStatus === 'ready' && (
-                <Text size="xs" c="dimmed">
-                  {t('payment.canCloseWindow', 'You can now close this window.')}
-                </Text>
-              )}
-            </Stack>
-          </Alert>
-        );
-
-      case 'error':
-        return (
-          <Alert color="red" title={t('payment.error', 'Payment Error')}>
-            <Stack gap="md">
-              <Text size="sm">{state.error}</Text>
-              <Button variant="outline" onClick={handleClose}>
-                {t('common.close', 'Close')}
-              </Button>
-            </Stack>
-          </Alert>
-        );
-
-      default:
-        return null;
-    }
-  };
-
-  return (
-    <Modal
-      opened={opened}
-      onClose={handleClose}
-      title={
-        <Text fw={600} size="lg">
-          {t('payment.upgradeTitle', 'Upgrade to {{planName}}', { planName: planGroup.name })}
-        </Text>
-      }
-      size="90%"
-      centered
-      withCloseButton={true}
-      closeOnEscape={true}
-      closeOnClickOutside={false}
-      zIndex={Z_INDEX_OVER_CONFIG_MODAL}
-      styles={{
-        body: {
-          minHeight: '85vh',
-        },
-        content: {
-          maxHeight: '95vh',
-        },
-      }}
-    >
-      {renderContent()}
-    </Modal>
-  );
-};
-
-export default StripeCheckout;
diff --git a/frontend/src/proprietary/components/shared/UpdateSeatsButton.tsx b/frontend/src/proprietary/components/shared/UpdateSeatsButton.tsx
new file mode 100644
index 000000000..ddc43350b
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/UpdateSeatsButton.tsx
@@ -0,0 +1,38 @@
+import React from 'react';
+import { Button, ButtonProps } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import { useUpdateSeats } from '@app/contexts/UpdateSeatsContext';
+
+interface UpdateSeatsButtonProps extends Omit<ButtonProps, 'onClick' | 'loading'> {
+  onSuccess?: () => void;
+  onError?: (error: string) => void;
+}
+
+export const UpdateSeatsButton: React.FC<UpdateSeatsButtonProps> = ({
+  onSuccess,
+  onError,
+  ...buttonProps
+}) => {
+  const { t } = useTranslation();
+  const { openUpdateSeats, isLoading } = useUpdateSeats();
+
+  const handleClick = async () => {
+    await openUpdateSeats({
+      onSuccess,
+      onError,
+    });
+  };
+
+  return (
+    <Button
+      variant="outline"
+      onClick={handleClick}
+      loading={isLoading}
+      {...buttonProps}
+    >
+      {t('billing.updateSeats', 'Update Seats')}
+    </Button>
+  );
+};
+
+export default UpdateSeatsButton;
diff --git a/frontend/src/proprietary/components/shared/UpdateSeatsModal.tsx b/frontend/src/proprietary/components/shared/UpdateSeatsModal.tsx
new file mode 100644
index 000000000..87827725f
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/UpdateSeatsModal.tsx
@@ -0,0 +1,205 @@
+import React, { useState, useEffect } from 'react';
+import { Modal, Button, Text, Alert, Loader, Stack, Group, NumberInput } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import { Z_INDEX_OVER_CONFIG_MODAL } from '@app/styles/zIndex';
+
+interface UpdateSeatsModalProps {
+  opened: boolean;
+  onClose: () => void;
+  currentSeats: number;
+  minimumSeats: number;
+  _onSuccess?: () => void;
+  onError?: (error: string) => void;
+  onUpdateSeats?: (newSeats: number) => Promise<string>; // Returns billing portal URL
+}
+
+type UpdateState = {
+  status: 'idle' | 'loading' | 'error';
+  error?: string;
+};
+
+const UpdateSeatsModal: React.FC<UpdateSeatsModalProps> = ({
+  opened,
+  onClose,
+  currentSeats,
+  minimumSeats,
+  _onSuccess,
+  onError,
+  onUpdateSeats,
+}) => {
+  const { t } = useTranslation();
+  const [state, setState] = useState<UpdateState>({ status: 'idle' });
+  const [newSeatCount, setNewSeatCount] = useState<number>(minimumSeats);
+
+  // Reset seat count when modal opens
+  useEffect(() => {
+    if (opened) {
+      setNewSeatCount(minimumSeats);
+      setState({ status: 'idle' });
+    }
+  }, [opened, minimumSeats]);
+
+  const handleUpdateSeats = async () => {
+    if (!onUpdateSeats) {
+      setState({
+        status: 'error',
+        error: 'Update function not provided',
+      });
+      return;
+    }
+
+    if (newSeatCount < minimumSeats) {
+      setState({
+        status: 'error',
+        error: t(
+          'billing.seatCountTooLow',
+          'Seat count must be at least {{minimum}} (current number of users)',
+          { minimum: minimumSeats }
+        ),
+      });
+      return;
+    }
+
+    if (newSeatCount === currentSeats) {
+      setState({
+        status: 'error',
+        error: t('billing.seatCountUnchanged', 'Please select a different seat count'),
+      });
+      return;
+    }
+
+    try {
+      setState({ status: 'loading' });
+
+      // Call the update function (will call manage-billing)
+      const portalUrl = await onUpdateSeats(newSeatCount);
+
+      // Redirect to Stripe billing portal
+      console.log('Redirecting to Stripe billing portal:', portalUrl);
+      window.location.href = portalUrl;
+
+      // Note: No need to call onSuccess here since we're redirecting
+      // The return flow will handle success notification
+    } catch (err) {
+      const errorMessage =
+        err instanceof Error ? err.message : 'Failed to update seat count';
+      setState({
+        status: 'error',
+        error: errorMessage,
+      });
+      onError?.(errorMessage);
+    }
+  };
+
+  const handleClose = () => {
+    setState({ status: 'idle' });
+    setNewSeatCount(currentSeats);
+    onClose();
+  };
+
+  const renderContent = () => {
+    if (state.status === 'loading') {
+      return (
+        <Stack align="center" justify="center" style={{ padding: '2rem 0' }}>
+          <Loader size="lg" />
+          <Text size="sm" c="dimmed" mt="md">
+            {t('billing.preparingUpdate', 'Preparing seat update...')}
+          </Text>
+        </Stack>
+      );
+    }
+
+    return (
+      <Stack gap="lg">
+        {state.status === 'error' && (
+          <Alert color="red" title={t('common.error', 'Error')}>
+            {state.error}
+          </Alert>
+        )}
+
+        <Stack gap="md" mt="md">
+          <Group justify="space-between">
+            <Text size="sm" fw={500}>
+              {t('billing.currentSeats', 'Current Seats')}:
+            </Text>
+            <Text size="sm" fw={600}>
+              {currentSeats}
+            </Text>
+          </Group>
+          <Group justify="space-between">
+            <Text size="sm" fw={500}>
+              {t('billing.minimumSeats', 'Minimum Seats')}:
+            </Text>
+            <Text size="sm" c="dimmed">
+              {minimumSeats} {t('billing.basedOnUsers', '(current users)')}
+            </Text>
+          </Group>
+        </Stack>
+
+        <NumberInput
+          label={t('billing.newSeatCount', 'New Seat Count')}
+          description={t(
+            'billing.newSeatCountDescription',
+            'Select the number of seats for your enterprise license'
+          )}
+          value={newSeatCount}
+          onChange={(value) => setNewSeatCount(typeof value === 'number' ? value : minimumSeats)}
+          min={minimumSeats}
+          max={10000}
+          step={1}
+          size="md"
+          styles={{
+            input: {
+              fontSize: '1.5rem',
+              fontWeight: 500,
+              textAlign: 'center',
+            },
+          }}
+        />
+
+        <Alert color="blue" title={t('billing.whatHappensNext', 'What happens next?')}>
+          <Text size="sm">
+            {t(
+              'billing.stripePortalRedirect',
+              'You will be redirected to Stripe\'s billing portal to review and confirm the seat change. The prorated amount will be calculated automatically.'
+            )}
+          </Text>
+        </Alert>
+
+        <Group justify="flex-end" gap="sm">
+          <Button variant="outline" onClick={handleClose}>
+            {t('common.cancel', 'Cancel')}
+          </Button>
+          <Button
+            onClick={handleUpdateSeats}
+            disabled={newSeatCount === currentSeats || newSeatCount < minimumSeats}
+          >
+            {t('billing.updateSeats', 'Update Seats')}
+          </Button>
+        </Group>
+      </Stack>
+    );
+  };
+
+  return (
+    <Modal
+      opened={opened}
+      onClose={handleClose}
+      title={
+        <Text fw={600} size="lg">
+          {t('billing.updateEnterpriseSeats', 'Update Enterprise Seats')}
+        </Text>
+      }
+      size="md"
+      centered
+      withCloseButton={true}
+      closeOnEscape={true}
+      closeOnClickOutside={false}
+      zIndex={Z_INDEX_OVER_CONFIG_MODAL}
+    >
+      {renderContent()}
+    </Modal>
+  );
+};
+
+export default UpdateSeatsModal;
diff --git a/frontend/src/proprietary/components/shared/UpgradeBanner.tsx b/frontend/src/proprietary/components/shared/UpgradeBanner.tsx
index 93a5eb827..bbb6a729b 100644
--- a/frontend/src/proprietary/components/shared/UpgradeBanner.tsx
+++ b/frontend/src/proprietary/components/shared/UpgradeBanner.tsx
@@ -75,7 +75,7 @@ const UpgradeBanner: React.FC = () => {
   // Handle upgrade button click
   const handleUpgrade = () => {
     openCheckout('server', {
-      currency: 'gbp',
+      // Currency auto-detected from locale in CheckoutContext
       minimumSeats: 1,
       onSuccess: () => {
         // Banner will auto-hide on next render when license is detected
diff --git a/frontend/src/proprietary/components/shared/config/configNavSections.tsx b/frontend/src/proprietary/components/shared/config/configNavSections.tsx
index 2b27a4ba9..27e02bd89 100644
--- a/frontend/src/proprietary/components/shared/config/configNavSections.tsx
+++ b/frontend/src/proprietary/components/shared/config/configNavSections.tsx
@@ -9,7 +9,6 @@ import AdminPrivacySection from '@app/components/shared/config/configSections/Ad
 import AdminDatabaseSection from '@app/components/shared/config/configSections/AdminDatabaseSection';
 import AdminAdvancedSection from '@app/components/shared/config/configSections/AdminAdvancedSection';
 import AdminLegalSection from '@app/components/shared/config/configSections/AdminLegalSection';
-import AdminPremiumSection from '@app/components/shared/config/configSections/AdminPremiumSection';
 import AdminPlanSection from '@app/components/shared/config/configSections/AdminPlanSection';
 import AdminFeaturesSection from '@app/components/shared/config/configSections/AdminFeaturesSection';
 import AdminEndpointsSection from '@app/components/shared/config/configSections/AdminEndpointsSection';
@@ -129,14 +128,6 @@ export const createConfigNavSections = (
     sections.push({
       title: 'Licensing & Analytics',
       items: [
-        {
-          key: 'adminPremium',
-          label: 'Premium',
-          icon: 'star-rounded',
-          component: <AdminPremiumSection />,
-          disabled: requiresLogin,
-          disabledTooltip: requiresLogin ? 'Enable login mode first' : undefined
-        },
         {
           key: 'adminPlan',
           label: 'Plan',
diff --git a/frontend/src/proprietary/components/shared/config/configSections/AdminPlanSection.tsx b/frontend/src/proprietary/components/shared/config/configSections/AdminPlanSection.tsx
index 522658004..9be46d1d8 100644
--- a/frontend/src/proprietary/components/shared/config/configSections/AdminPlanSection.tsx
+++ b/frontend/src/proprietary/components/shared/config/configSections/AdminPlanSection.tsx
@@ -1,23 +1,25 @@
 import React, { useState, useCallback, useEffect } from 'react';
-import { Divider, Loader, Alert, Select, Group, Text, Collapse, Button, TextInput, Stack, Paper } from '@mantine/core';
+import { Divider, Loader, Alert, Group, Text, Collapse, Button, TextInput, Stack, Paper } from '@mantine/core';
 import { useTranslation } from 'react-i18next';
 import { usePlans } from '@app/hooks/usePlans';
-import licenseService, { PlanTierGroup } from '@app/services/licenseService';
+import licenseService, { PlanTierGroup, mapLicenseToTier } from '@app/services/licenseService';
 import { useCheckout } from '@app/contexts/CheckoutContext';
 import { useLicense } from '@app/contexts/LicenseContext';
 import AvailablePlansSection from '@app/components/shared/config/configSections/plan/AvailablePlansSection';
 import StaticPlanSection from '@app/components/shared/config/configSections/plan/StaticPlanSection';
 import { alert } from '@app/components/toast';
 import LocalIcon from '@app/components/shared/LocalIcon';
-import { Z_INDEX_OVER_CONFIG_MODAL } from '@app/styles/zIndex';
-import { ManageBillingButton } from '@app/components/shared/ManageBillingButton';
 import { isSupabaseConfigured } from '@app/services/supabaseClient';
+import { getPreferredCurrency, setCachedCurrency } from '@app/utils/currencyDetection';
 
 const AdminPlanSection: React.FC = () => {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
   const { openCheckout } = useCheckout();
   const { licenseInfo, refetchLicense } = useLicense();
-  const [currency, setCurrency] = useState<string>('gbp');
+  const [currency, setCurrency] = useState<string>(() => {
+    // Initialize with auto-detected currency on first render
+    return getPreferredCurrency(i18n.language);
+  });
   const [useStaticVersion, setUseStaticVersion] = useState(false);
   const [showLicenseKey, setShowLicenseKey] = useState(false);
   const [licenseKeyInput, setLicenseKeyInput] = useState<string>('');
@@ -80,6 +82,36 @@ const AdminPlanSection: React.FC = () => {
     { value: 'idr', label: 'Indonesian rupiah (IDR, Rp)' },
   ];
 
+  const handleManageClick = useCallback(async () => {
+    try {
+      if (!licenseInfo?.licenseKey) {
+        throw new Error('No license key found. Please activate a license first.');
+      }
+
+      // Create billing portal session with license key
+      const response = await licenseService.createBillingPortalSession(
+        window.location.href,
+        licenseInfo.licenseKey
+      );
+
+      // Open billing portal in new tab
+      window.open(response.url, '_blank');
+    } catch (error: any) {
+      console.error('Failed to open billing portal:', error);
+      alert({
+        alertType: 'error',
+        title: t('billing.portal.error', 'Failed to open billing portal'),
+        body: error.message || 'Please try again or contact support.',
+      });
+    }
+  }, [licenseInfo, t]);
+
+  const handleCurrencyChange = useCallback((newCurrency: string) => {
+    setCurrency(newCurrency);
+    // Persist user's manual selection to localStorage
+    setCachedCurrency(newCurrency);
+  }, []);
+
   const handleUpgradeClick = useCallback(
     (planGroup: PlanTierGroup) => {
       // Only allow upgrades for server and enterprise tiers
@@ -87,6 +119,20 @@ const AdminPlanSection: React.FC = () => {
         return;
       }
 
+      // Prevent free tier users from directly accessing enterprise (must have server first)
+      const currentTier = mapLicenseToTier(licenseInfo);
+      if (currentTier === 'free' && planGroup.tier === 'enterprise') {
+        alert({
+          alertType: 'warning',
+          title: t('plan.enterprise.requiresServer', 'Server Plan Required'),
+          body: t(
+            'plan.enterprise.requiresServerMessage',
+            'Please upgrade to the Server plan first before upgrading to Enterprise.'
+          ),
+        });
+        return;
+      }
+
       // Use checkout context to open checkout modal
       openCheckout(planGroup.tier, {
         currency,
@@ -97,7 +143,7 @@ const AdminPlanSection: React.FC = () => {
         },
       });
     },
-    [openCheckout, currency, refetch]
+    [openCheckout, currency, refetch, licenseInfo, t]
   );
 
   // Show static version if Stripe is not configured or there's an error
@@ -129,40 +175,14 @@ const AdminPlanSection: React.FC = () => {
 
   return (
     <div style={{ display: 'flex', flexDirection: 'column', gap: '2rem' }}>
-      {/* Currency Selection & Manage Subscription */}
-      <Paper withBorder p="md" radius="md">
-        <Stack gap="md">
-          <Group justify="space-between" align="center">
-            <Text size="lg" fw={600}>
-              {t('plan.currency', 'Currency')}
-            </Text>
-            <Select
-              value={currency}
-              onChange={(value) => setCurrency(value || 'gbp')}
-              data={currencyOptions}
-              searchable
-              clearable={false}
-              w={300}
-              comboboxProps={{ withinPortal: true, zIndex: Z_INDEX_OVER_CONFIG_MODAL }}
-            />
-          </Group>
-
-          {/* Manage Subscription Button - Only show if user has active license and Supabase is configured */}
-          {licenseInfo?.licenseKey && isSupabaseConfigured && (
-            <Group justify="space-between" align="center">
-              <Text size="sm" c="dimmed">
-                {t('plan.manageSubscription.description', 'Manage your subscription, billing, and payment methods')}
-              </Text>
-              <ManageBillingButton />
-            </Group>
-          )}
-        </Stack>
-      </Paper>
-
       <AvailablePlansSection
         plans={plans}
         currentLicenseInfo={licenseInfo}
         onUpgradeClick={handleUpgradeClick}
+        onManageClick={handleManageClick}
+        currency={currency}
+        onCurrencyChange={handleCurrencyChange}
+        currencyOptions={currencyOptions}
       />
 
       <Divider />
diff --git a/frontend/src/proprietary/components/shared/config/configSections/PeopleSection.tsx b/frontend/src/proprietary/components/shared/config/configSections/PeopleSection.tsx
index 0ed92665a..bc11025cd 100644
--- a/frontend/src/proprietary/components/shared/config/configSections/PeopleSection.tsx
+++ b/frontend/src/proprietary/components/shared/config/configSections/PeopleSection.tsx
@@ -27,11 +27,14 @@ import { useAppConfig } from '@app/contexts/AppConfigContext';
 import InviteMembersModal from '@app/components/shared/InviteMembersModal';
 import { useLoginRequired } from '@app/hooks/useLoginRequired';
 import LoginRequiredBanner from '@app/components/shared/config/LoginRequiredBanner';
+import UpdateSeatsButton from '@app/components/shared/UpdateSeatsButton';
+import { useLicense } from '@app/contexts/LicenseContext';
 
 export default function PeopleSection() {
   const { t } = useTranslation();
   const { config } = useAppConfig();
   const { loginEnabled } = useLoginRequired();
+  const { licenseInfo: globalLicenseInfo } = useLicense();
   const [users, setUsers] = useState<User[]>([]);
   const [teams, setTeams] = useState<Team[]>([]);
   const [loading, setLoading] = useState(true);
@@ -342,6 +345,17 @@ export default function PeopleSection() {
               +{licenseInfo.licenseMaxUsers} {t('workspace.people.license.fromLicense', 'from license')}
             </Badge>
           )}
+
+          {/* Enterprise Seat Management Button */}
+          {globalLicenseInfo?.licenseType === 'ENTERPRISE' && (
+            <>
+              <Text size="sm" c="dimmed" span>•</Text>
+              <UpdateSeatsButton
+                size="xs"
+                onSuccess={fetchData}
+              />
+            </>
+          )}
         </Group>
       )}
 
@@ -494,9 +508,9 @@ export default function PeopleSection() {
                           <div>
                             <Text size="xs" fw={500}>Authentication: {user.authenticationType || 'Unknown'}</Text>
                             <Text size="xs">
-                              Last Activity: {user.lastRequest
+                              Last Activity: {user.lastRequest && new Date(user.lastRequest).getFullYear() >= 1980
                                 ? new Date(user.lastRequest).toLocaleString()
-                                : 'Never'}
+                                :t('never', 'Never')}
                             </Text>
                           </div>
                         }
diff --git a/frontend/src/proprietary/components/shared/config/configSections/plan/AvailablePlansSection.tsx b/frontend/src/proprietary/components/shared/config/configSections/plan/AvailablePlansSection.tsx
index 2c0640a3f..80d651893 100644
--- a/frontend/src/proprietary/components/shared/config/configSections/plan/AvailablePlansSection.tsx
+++ b/frontend/src/proprietary/components/shared/config/configSections/plan/AvailablePlansSection.tsx
@@ -1,21 +1,30 @@
 import React, { useState, useMemo } from 'react';
-import { Button, Collapse } from '@mantine/core';
+import { Button, Collapse, Select, Group } from '@mantine/core';
 import { useTranslation } from 'react-i18next';
 import licenseService, { PlanTier, PlanTierGroup, LicenseInfo, mapLicenseToTier } from '@app/services/licenseService';
 import PlanCard from '@app/components/shared/config/configSections/plan/PlanCard';
 import FeatureComparisonTable from '@app/components/shared/config/configSections/plan/FeatureComparisonTable';
+import { Z_INDEX_OVER_CONFIG_MODAL } from '@app/styles/zIndex';
 
 interface AvailablePlansSectionProps {
   plans: PlanTier[];
   currentPlanId?: string;
   currentLicenseInfo?: LicenseInfo | null;
   onUpgradeClick: (planGroup: PlanTierGroup) => void;
+  onManageClick?: () => void;
+  currency?: string;
+  onCurrencyChange?: (currency: string) => void;
+  currencyOptions?: { value: string; label: string }[];
 }
 
 const AvailablePlansSection: React.FC<AvailablePlansSectionProps> = ({
   plans,
   currentLicenseInfo,
   onUpgradeClick,
+  onManageClick,
+  currency,
+  onCurrencyChange,
+  currencyOptions,
 }) => {
   const { t } = useTranslation();
   const [showComparison, setShowComparison] = useState(false);
@@ -58,25 +67,40 @@ const AvailablePlansSection: React.FC<AvailablePlansSectionProps> = ({
 
   return (
     <div>
-      <h3 style={{ margin: 0, color: 'var(--mantine-color-text)', fontSize: '1rem' }}>
-        {t('plan.availablePlans.title', 'Available Plans')}
-      </h3>
-      <p
-        style={{
-          margin: '0.25rem 0 1rem 0',
-          color: 'var(--mantine-color-dimmed)',
-          fontSize: '0.875rem',
-        }}
-      >
-        {t('plan.availablePlans.subtitle', 'Choose the plan that fits your needs')}
-      </p>
+      <Group justify="space-between" align="flex-start" mb="xs">
+        <div>
+          <h3 style={{ margin: 0, color: 'var(--mantine-color-text)', fontSize: '1rem' }}>
+            {t('plan.availablePlans.title', 'Available Plans')}
+          </h3>
+          <p
+            style={{
+              margin: '0.25rem 0 0 0',
+              color: 'var(--mantine-color-dimmed)',
+              fontSize: '0.875rem',
+            }}
+          >
+            {t('plan.availablePlans.subtitle', 'Choose the plan that fits your needs')}
+          </p>
+        </div>
+        {currency && onCurrencyChange && currencyOptions && (
+          <Select
+            value={currency}
+            onChange={(value) => onCurrencyChange(value || 'usd')}
+            data={currencyOptions}
+            searchable
+            clearable={false}
+            w={300}
+            comboboxProps={{ withinPortal: true, zIndex: Z_INDEX_OVER_CONFIG_MODAL }}
+          />
+        )}
+      </Group>
 
       <div
         style={{
           display: 'grid',
           gridTemplateColumns: 'repeat(3, 1fr)',
           gap: '1rem',
-          marginBottom: '1rem',
+          marginBottom: '0.5rem',
         }}
       >
         {groupedPlans.map((group) => (
@@ -86,7 +110,9 @@ const AvailablePlansSection: React.FC<AvailablePlansSectionProps> = ({
             isCurrentTier={isCurrentTier(group)}
             isDowngrade={isDowngrade(group)}
             currentLicenseInfo={currentLicenseInfo}
+            currentTier={currentTier}
             onUpgradeClick={onUpgradeClick}
+            onManageClick={onManageClick}
           />
         ))}
       </div>
@@ -100,7 +126,7 @@ const AvailablePlansSection: React.FC<AvailablePlansSectionProps> = ({
       </div>
 
       <Collapse in={showComparison}>
-        <FeatureComparisonTable plans={groupedPlans} />
+        <FeatureComparisonTable plans={groupedPlans} currentTier={currentTier} />
       </Collapse>
     </div>
   );
diff --git a/frontend/src/proprietary/components/shared/config/configSections/plan/FeatureComparisonTable.tsx b/frontend/src/proprietary/components/shared/config/configSections/plan/FeatureComparisonTable.tsx
index 129d59b9f..d297853f0 100644
--- a/frontend/src/proprietary/components/shared/config/configSections/plan/FeatureComparisonTable.tsx
+++ b/frontend/src/proprietary/components/shared/config/configSections/plan/FeatureComparisonTable.tsx
@@ -12,9 +12,10 @@ interface PlanWithFeatures {
 
 interface FeatureComparisonTableProps {
   plans: PlanWithFeatures[];
+  currentTier?: 'free' | 'server' | 'enterprise' | null;
 }
 
-const FeatureComparisonTable: React.FC<FeatureComparisonTableProps> = ({ plans }) => {
+const FeatureComparisonTable: React.FC<FeatureComparisonTableProps> = ({ plans, currentTier }) => {
   const { t } = useTranslation();
 
   return (
@@ -41,7 +42,7 @@ const FeatureComparisonTable: React.FC<FeatureComparisonTableProps> = ({ plans }
                   }}
                 >
                   {plan.name}
-                  {plan.popular && (
+                  {plan.popular && !(plan.tier === 'server' && currentTier === 'enterprise') && (
                     <Badge
                       color="blue"
                       variant="filled"
diff --git a/frontend/src/proprietary/components/shared/config/configSections/plan/PlanCard.tsx b/frontend/src/proprietary/components/shared/config/configSections/plan/PlanCard.tsx
index 696fa50e9..dff579dee 100644
--- a/frontend/src/proprietary/components/shared/config/configSections/plan/PlanCard.tsx
+++ b/frontend/src/proprietary/components/shared/config/configSections/plan/PlanCard.tsx
@@ -1,44 +1,42 @@
 import React from 'react';
-import { Button, Card, Badge, Text, Stack, Divider } from '@mantine/core';
+import { Button, Card, Text, Stack, Divider, Tooltip } from '@mantine/core';
 import { useTranslation } from 'react-i18next';
 import { PlanTierGroup, LicenseInfo } from '@app/services/licenseService';
+import { PricingBadge } from '@app/components/shared/stripeCheckout/components/PricingBadge';
+import { PriceDisplay } from '@app/components/shared/stripeCheckout/components/PriceDisplay';
+import { calculateDisplayPricing } from '@app/components/shared/stripeCheckout/utils/pricingUtils';
+import { getBaseCardStyle } from '@app/components/shared/stripeCheckout/utils/cardStyles';
 
 interface PlanCardProps {
   planGroup: PlanTierGroup;
   isCurrentTier: boolean;
   isDowngrade: boolean;
   currentLicenseInfo?: LicenseInfo | null;
+  currentTier?: 'free' | 'server' | 'enterprise' | null;
   onUpgradeClick: (planGroup: PlanTierGroup) => void;
+  onManageClick?: () => void;
 }
 
-const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngrade, currentLicenseInfo, onUpgradeClick }) => {
+const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngrade, currentLicenseInfo, currentTier, onUpgradeClick, onManageClick }) => {
   const { t } = useTranslation();
 
   // Render Free plan
   if (planGroup.tier === 'free') {
+    // Get currency from the free plan
+    const freeCurrency = planGroup.monthly?.currency || '$';
+
     return (
       <Card
         padding="lg"
         radius="md"
         withBorder
-        style={{
-          position: 'relative',
-          display: 'flex',
-          flexDirection: 'column',
-          minHeight: '400px',
-          borderColor: isCurrentTier ? 'var(--mantine-color-green-6)' : undefined,
-          borderWidth: isCurrentTier ? '2px' : undefined,
-        }}
+        style={getBaseCardStyle(isCurrentTier)}
       >
         {isCurrentTier && (
-          <Badge
-            color="green"
-            variant="filled"
-            size="sm"
-            style={{ position: 'absolute', top: '1rem', right: '1rem' }}
-          >
-            {t('plan.current', 'Current Plan')}
-          </Badge>
+          <PricingBadge
+            type="current"
+            label={t('plan.current', 'Current Plan')}
+          />
         )}
         <Stack gap="md" style={{ height: '100%' }}>
           <div>
@@ -48,12 +46,12 @@ const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngra
             <Text size="xs" c="dimmed" mb="xs" style={{ opacity: 0 }}>
               {t('plan.from', 'From')}
             </Text>
-            <Text size="2.5rem" fw={700} style={{ lineHeight: 1 }}>
-              £0
-            </Text>
-            <Text size="sm" c="dimmed" mt="xs">
-              {t('plan.free.forever', 'Forever free')}
-            </Text>
+            <PriceDisplay
+              mode="simple"
+              price={0}
+              currency={freeCurrency}
+              period={t('plan.free.forever', 'Forever free')}
+            />
           </div>
 
           <Divider />
@@ -82,48 +80,32 @@ const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngra
   const { monthly, yearly } = planGroup;
   const isEnterprise = planGroup.tier === 'enterprise';
 
-  // Calculate "From" pricing - show yearly price divided by 12 for lowest monthly equivalent
-  let displayPrice = monthly?.price || 0;
-  let displaySeatPrice = monthly?.seatPrice;
-  let displayCurrency = monthly?.currency || '£';
+  // Block enterprise for free tier users (must have server first)
+  const isEnterpriseBlockedForFree = isEnterprise && currentTier === 'free';
 
-  if (yearly) {
-    displayPrice = Math.round(yearly.price / 12);
-    displaySeatPrice = yearly.seatPrice ? Math.round(yearly.seatPrice / 12) : undefined;
-    displayCurrency = yearly.currency;
-  }
+  // Calculate "From" pricing - show yearly price divided by 12 for lowest monthly equivalent
+  const { displayPrice, displaySeatPrice, displayCurrency } = calculateDisplayPricing(
+    monthly || undefined,
+    yearly || undefined
+  );
 
   return (
     <Card
       padding="lg"
       radius="md"
       withBorder
-      style={{
-        position: 'relative',
-        display: 'flex',
-        flexDirection: 'column',
-        minHeight: '400px',
-        borderColor: isCurrentTier ? 'var(--mantine-color-green-6)' : undefined,
-        borderWidth: isCurrentTier ? '2px' : undefined,
-      }}
+      style={getBaseCardStyle(isCurrentTier)}
     >
       {isCurrentTier ? (
-        <Badge
-          color="green"
-          variant="filled"
-          size="sm"
-          style={{ position: 'absolute', top: '1rem', right: '1rem' }}
-        >
-          {t('plan.current', 'Current Plan')}
-        </Badge>
-      ) : planGroup.popular ? (
-        <Badge
-          variant="filled"
-          size="sm"
-          style={{ position: 'absolute', top: '1rem', right: '1rem' }}
-        >
-          {t('plan.popular', 'Popular')}
-        </Badge>
+        <PricingBadge
+          type="current"
+          label={t('plan.current', 'Current Plan')}
+        />
+      ) : planGroup.popular && !(planGroup.tier === 'server' && currentTier === 'enterprise') ? (
+        <PricingBadge
+          type="popular"
+          label={t('plan.popular', 'Popular')}
+        />
       ) : null}
 
       <Stack gap="md" style={{ height: '100%' }}>
@@ -140,29 +122,23 @@ const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngra
           {/* Price */}
           {isEnterprise && displaySeatPrice !== undefined ? (
             <>
-              <Text size="2.5rem" fw={700} style={{ lineHeight: 1 }}>
-                {displayCurrency}{displayPrice}
+              <Text span size="2.25rem" fw={600} style={{ lineHeight: 1 }}>
+                {displayCurrency}{displaySeatPrice.toFixed(2)}
+              </Text>
+              <Text span size="1.5rem" c="dimmed" mt="xs">
+                {t('plan.perSeat', '/seat')}
               </Text>
               <Text size="sm" c="dimmed" mt="xs">
-                + {displayCurrency}{displaySeatPrice}/seat {t('plan.perMonth', '/month')}
+                {t('plan.perMonth', '/month')} {t('plan.withServer', '+ Server Plan')}
               </Text>
             </>
           ) : (
-            <>
-              <Text size="2.5rem" fw={700} style={{ lineHeight: 1 }}>
-                {displayCurrency}{displayPrice}
-              </Text>
-              <Text size="sm" c="dimmed" mt="xs">
-                {t('plan.perMonth', '/month')}
-              </Text>
-            </>
-          )}
-
-          {/* Show seat count for enterprise plans when current */}
-          {isEnterprise && isCurrentTier && currentLicenseInfo && currentLicenseInfo.maxUsers > 0 && (
-            <Text size="sm" c="green" fw={500} mt="xs">
-              {t('plan.licensedSeats', 'Licensed: {{count}} seats', { count: currentLicenseInfo.maxUsers })}
-            </Text>
+            <PriceDisplay
+              mode="simple"
+              price={displayPrice}
+              currency={displayCurrency}
+              period={t('plan.perMonth', '/month')}
+            />
           )}
         </div>
 
@@ -179,21 +155,40 @@ const PlanCard: React.FC<PlanCardProps> = ({ planGroup, isCurrentTier, isDowngra
 
         <div style={{ flexGrow: 1 }} />
 
+      <Stack gap="xs">
+        {/* Show seat count for enterprise plans when current */}
+        {isEnterprise && isCurrentTier && currentLicenseInfo && currentLicenseInfo.maxUsers > 0 && (
+          <Text size="sm" c="green" fw={500} ta="center">
+            {t('plan.licensedSeats', 'Licensed: {{count}} seats', { count: currentLicenseInfo.maxUsers })}
+          </Text>
+        )}
+
         {/* Single Upgrade Button */}
-        <Button
-          variant={isCurrentTier || isDowngrade ? 'light' : 'filled'}
-          fullWidth
-          onClick={() => onUpgradeClick(planGroup)}
-          disabled={isCurrentTier || isDowngrade}
+        <Tooltip
+          label={t('plan.enterprise.requiresServer', 'Requires Server plan')}
+          disabled={!isEnterpriseBlockedForFree}
+          position="top"
+          withArrow
         >
-          {isCurrentTier
-            ? t('plan.current', 'Current Plan')
-            : isDowngrade
-              ? t('plan.includedInCurrent', 'Included in Your Plan')
-              : isEnterprise
-                ? t('plan.selectPlan', 'Select Plan')
-                : t('plan.upgrade', 'Upgrade')}
-        </Button>
+          <Button
+            variant={isCurrentTier ? 'filled' : isDowngrade ? 'filled' : isEnterpriseBlockedForFree ? 'light' : 'filled'}
+            fullWidth
+            onClick={() => isCurrentTier && onManageClick ? onManageClick() : onUpgradeClick(planGroup)}
+            disabled={isDowngrade || isEnterpriseBlockedForFree}
+          >
+            {isCurrentTier
+              ? t('plan.manage', 'Manage')
+              : isDowngrade
+                ? t('plan.free.included', 'Included')
+                : isEnterpriseBlockedForFree
+                  ? t('plan.enterprise.requiresServer', 'Requires Server')
+                  : isEnterprise
+                    ? t('plan.selectPlan', 'Select Plan')
+                    : t('plan.upgrade', 'Upgrade')}
+          </Button>
+        </Tooltip>
+
+        </Stack>
       </Stack>
     </Card>
   );
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/StripeCheckout.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/StripeCheckout.tsx
new file mode 100644
index 000000000..e0cac1a80
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/StripeCheckout.tsx
@@ -0,0 +1,309 @@
+import React, { useEffect } from 'react';
+import { Modal, Text, Alert, Stack, Button, Group, ActionIcon } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import LocalIcon from '@app/components/shared/LocalIcon';
+import { loadStripe } from '@stripe/stripe-js';
+import licenseService from '@app/services/licenseService';
+import { useIsMobile } from '@app/hooks/useIsMobile';
+import { Z_INDEX_OVER_CONFIG_MODAL } from '@app/styles/zIndex';
+import { StripeCheckoutProps } from '@app/components/shared/stripeCheckout/types/checkout';
+import { validateEmail, getModalTitle } from '@app/components/shared/stripeCheckout/utils/checkoutUtils';
+import { calculateSavings } from '@app/components/shared/stripeCheckout/utils/savingsCalculator';
+import { useCheckoutState } from '@app/components/shared/stripeCheckout/hooks/useCheckoutState';
+import { useCheckoutNavigation } from '@app/components/shared/stripeCheckout/hooks/useCheckoutNavigation';
+import { useLicensePolling } from '@app/components/shared/stripeCheckout/hooks/useLicensePolling';
+import { useCheckoutSession } from '@app/components/shared/stripeCheckout/hooks/useCheckoutSession';
+import { EmailStage } from '@app/components/shared/stripeCheckout/stages/EmailStage';
+import { PlanSelectionStage } from '@app/components/shared/stripeCheckout/stages/PlanSelectionStage';
+import { PaymentStage } from '@app/components/shared/stripeCheckout/stages/PaymentStage';
+import { SuccessStage } from '@app/components/shared/stripeCheckout/stages/SuccessStage';
+import { ErrorStage } from '@app/components/shared/stripeCheckout/stages/ErrorStage';
+
+// Validate Stripe key (static validation, no dynamic imports)
+const STRIPE_KEY = import.meta.env.VITE_STRIPE_PUBLISHABLE_KEY;
+
+if (!STRIPE_KEY) {
+  console.error(
+    'VITE_STRIPE_PUBLISHABLE_KEY environment variable is required. ' +
+    'Please add it to your .env file. ' +
+    'Get your key from https://dashboard.stripe.com/apikeys'
+  );
+}
+
+if (STRIPE_KEY && !STRIPE_KEY.startsWith('pk_')) {
+  console.error(
+    `Invalid Stripe publishable key format. ` +
+    `Expected key starting with 'pk_', got: ${STRIPE_KEY.substring(0, 10)}...`
+  );
+}
+
+const stripePromise = STRIPE_KEY ? loadStripe(STRIPE_KEY) : null;
+
+const StripeCheckout: React.FC<StripeCheckoutProps> = ({
+  opened,
+  onClose,
+  planGroup,
+  minimumSeats = 1,
+  onSuccess,
+  onError,
+  onLicenseActivated,
+  hostedCheckoutSuccess,
+}) => {
+  const { t } = useTranslation();
+  const isMobile = useIsMobile();
+
+  // Initialize all state via custom hook
+  const checkoutState = useCheckoutState(planGroup);
+
+  // Initialize navigation hooks
+  const navigation = useCheckoutNavigation(
+    checkoutState.state,
+    checkoutState.setState,
+    checkoutState.stageHistory,
+    checkoutState.setStageHistory
+  );
+
+  // Initialize license polling hook
+  const polling = useLicensePolling(
+    checkoutState.isMountedRef,
+    checkoutState.setPollingStatus,
+    checkoutState.setLicenseKey,
+    onLicenseActivated
+  );
+
+  // Initialize checkout session hook
+  const session = useCheckoutSession(
+    checkoutState.selectedPlan,
+    checkoutState.state,
+    checkoutState.setState,
+    checkoutState.installationId,
+    checkoutState.setInstallationId,
+    checkoutState.currentLicenseKey,
+    checkoutState.setCurrentLicenseKey,
+    checkoutState.setPollingStatus,
+    minimumSeats,
+    polling.pollForLicenseKey,
+    onSuccess,
+    onError,
+    onLicenseActivated
+  );
+
+  // Calculate savings
+  const savings = calculateSavings(planGroup, minimumSeats);
+
+  // Email submission handler
+  const handleEmailSubmit = () => {
+    const validation = validateEmail(checkoutState.emailInput);
+    if (validation.valid) {
+      checkoutState.setState(prev => ({ ...prev, email: checkoutState.emailInput }));
+      navigation.goToStage('plan-selection');
+    } else {
+      checkoutState.setEmailError(validation.error);
+    }
+  };
+
+  // Plan selection handler
+  const handlePlanSelect = (period: 'monthly' | 'yearly') => {
+    checkoutState.setSelectedPeriod(period);
+    navigation.goToStage('payment');
+  };
+
+  // Close handler
+  const handleClose = () => {
+    // Clear any active polling
+    if (checkoutState.pollingTimeoutRef.current) {
+      clearTimeout(checkoutState.pollingTimeoutRef.current);
+      checkoutState.pollingTimeoutRef.current = null;
+    }
+
+    checkoutState.resetState();
+    onClose();
+  };
+
+  // Cleanup on unmount
+  useEffect(() => {
+    checkoutState.isMountedRef.current = true;
+
+    return () => {
+      checkoutState.isMountedRef.current = false;
+      if (checkoutState.pollingTimeoutRef.current) {
+        clearTimeout(checkoutState.pollingTimeoutRef.current);
+        checkoutState.pollingTimeoutRef.current = null;
+      }
+    };
+  }, [checkoutState.isMountedRef, checkoutState.pollingTimeoutRef]);
+
+  // Initialize stage based on existing license
+  useEffect(() => {
+    if (!opened) return;
+
+    // Handle hosted checkout success - open directly to success state
+    if (hostedCheckoutSuccess) {
+      console.log('Opening modal to success state for hosted checkout return');
+
+      // Set appropriate state based on upgrade vs new subscription
+      if (hostedCheckoutSuccess.isUpgrade) {
+        checkoutState.setCurrentLicenseKey('existing'); // Flag to indicate upgrade
+        checkoutState.setPollingStatus('ready');
+      } else if (hostedCheckoutSuccess.licenseKey) {
+        checkoutState.setLicenseKey(hostedCheckoutSuccess.licenseKey);
+        checkoutState.setPollingStatus('ready');
+      }
+
+      // Set to success state to show success UI
+      checkoutState.setState({ currentStage: 'success', loading: false });
+      return;
+    }
+
+    // Check for existing license to skip email stage
+    const checkExistingLicense = async () => {
+      try {
+        const licenseInfo = await licenseService.getLicenseInfo();
+        if (licenseInfo && licenseInfo.licenseKey) {
+          // Has existing license - skip email stage
+          console.log('Existing license detected - skipping email stage');
+          checkoutState.setCurrentLicenseKey(licenseInfo.licenseKey);
+          checkoutState.setState({ currentStage: 'plan-selection', loading: false });
+        } else {
+          // No license - start at email stage
+          checkoutState.setState({ currentStage: 'email', loading: false });
+        }
+      } catch (error) {
+        console.warn('Could not check for existing license:', error);
+        // Default to email stage if check fails
+        checkoutState.setState({ currentStage: 'email', loading: false });
+      }
+    };
+
+    checkExistingLicense();
+  }, [opened, hostedCheckoutSuccess, checkoutState.setCurrentLicenseKey, checkoutState.setPollingStatus, checkoutState.setLicenseKey, checkoutState.setState]);
+
+  // Trigger checkout session creation when entering payment stage
+  useEffect(() => {
+    if (
+      checkoutState.state.currentStage === 'payment' &&
+      !checkoutState.state.clientSecret &&
+      !checkoutState.state.loading
+    ) {
+      session.createCheckoutSession();
+    }
+  }, [checkoutState.state.currentStage, checkoutState.state.clientSecret, checkoutState.state.loading, session]);
+
+  // Render stage content
+  const renderContent = () => {
+    // Check if Stripe is configured
+    if (!stripePromise) {
+      return (
+        <Alert color="red" title={t('payment.stripeNotConfigured', 'Stripe Not Configured')}>
+          <Stack gap="md">
+            <Text size="sm">
+              {t(
+                'payment.stripeNotConfiguredMessage',
+                'Stripe payment integration is not configured. Please contact your administrator.'
+              )}
+            </Text>
+            <Button variant="outline" onClick={handleClose}>
+              {t('common.close', 'Close')}
+            </Button>
+          </Stack>
+        </Alert>
+      );
+    }
+
+    switch (checkoutState.state.currentStage) {
+      case 'email':
+        return (
+          <EmailStage
+            emailInput={checkoutState.emailInput}
+            setEmailInput={checkoutState.setEmailInput}
+            emailError={checkoutState.emailError}
+            onSubmit={handleEmailSubmit}
+          />
+        );
+
+      case 'plan-selection':
+        return (
+          <PlanSelectionStage
+            planGroup={planGroup}
+            minimumSeats={minimumSeats}
+            savings={savings}
+            onSelectPlan={handlePlanSelect}
+          />
+        );
+
+      case 'payment':
+        return (
+          <PaymentStage
+            clientSecret={checkoutState.state.clientSecret || null}
+            selectedPlan={checkoutState.selectedPlan}
+            onPaymentComplete={session.handlePaymentComplete}
+          />
+        );
+
+      case 'success':
+        return (
+          <SuccessStage
+            pollingStatus={checkoutState.pollingStatus}
+            currentLicenseKey={checkoutState.currentLicenseKey}
+            licenseKey={checkoutState.licenseKey}
+            onClose={handleClose}
+          />
+        );
+
+      case 'error':
+        return (
+          <ErrorStage
+            error={checkoutState.state.error || 'An unknown error occurred'}
+            onClose={handleClose}
+          />
+        );
+
+      default:
+        return null;
+    }
+  };
+
+  const canGoBack = checkoutState.stageHistory.length > 0;
+
+  return (
+    <Modal
+      opened={opened}
+      onClose={handleClose}
+      title={
+        <Group gap="sm" wrap="nowrap">
+          {canGoBack && (
+            <ActionIcon
+              variant="subtle"
+              size="lg"
+              onClick={navigation.goBack}
+              aria-label={t('common.back', 'Back')}
+            >
+              <LocalIcon icon="arrow-back" width={20} height={20} />
+            </ActionIcon>
+          )}
+          <Text fw={600} size="lg">
+            {getModalTitle(checkoutState.state.currentStage, planGroup.name, t)}
+          </Text>
+        </Group>
+      }
+      size={isMobile ? "100%" : 980}
+      centered
+      radius="lg"
+      withCloseButton={true}
+      closeOnEscape={true}
+      closeOnClickOutside={false}
+      fullScreen={isMobile}
+      zIndex={Z_INDEX_OVER_CONFIG_MODAL}
+      styles={{
+        body: {},
+        content: {
+          maxHeight: '95vh',
+        },
+      }}
+    >
+      {renderContent()}
+    </Modal>
+  );
+};
+
+export default StripeCheckout;
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/components/PriceDisplay.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/components/PriceDisplay.tsx
new file mode 100644
index 000000000..b0e3ff927
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/components/PriceDisplay.tsx
@@ -0,0 +1,89 @@
+import React from 'react';
+import { Text, Stack } from '@mantine/core';
+import { formatPrice } from '@app/components/shared/stripeCheckout/utils/pricingUtils';
+import { PRICE_FONT_WEIGHT } from '@app/components/shared/stripeCheckout/utils/cardStyles';
+
+interface SimplePriceProps {
+  mode: 'simple';
+  price: number;
+  currency: string;
+  period: string;
+  size?: string;
+}
+
+interface EnterprisePriceProps {
+  mode: 'enterprise';
+  basePrice: number;
+  seatPrice: number;
+  totalPrice?: number;
+  currency: string;
+  period: 'month' | 'year';
+  seatCount?: number;
+  size?: 'sm' | 'md' | 'lg';
+}
+
+type PriceDisplayProps = SimplePriceProps | EnterprisePriceProps;
+
+export const PriceDisplay: React.FC<PriceDisplayProps> = (props) => {
+  if (props.mode === 'simple') {
+    const fontSize = props.size || '2.25rem';
+    return (
+      <>
+        <Text size={fontSize} fw={PRICE_FONT_WEIGHT} style={{ lineHeight: 1 }}>
+          {formatPrice(props.price, props.currency)}
+        </Text>
+        <Text size="sm" c="dimmed" mt="xs">
+          {props.period}
+        </Text>
+      </>
+    );
+  }
+
+  // Enterprise mode
+  const { basePrice, seatPrice, totalPrice, currency, period, seatCount, size = 'md' } = props;
+  const fontSize = size === 'lg' ? '2rem' : size === 'sm' ? 'md' : 'xl';
+  const totalFontSize = size === 'lg' ? '2rem' : '2rem';
+
+  return (
+    <Stack gap="sm">
+      <div>
+        <Text size="sm" c="dimmed" mb="xs">
+          Base Price
+        </Text>
+        <Text size={fontSize} fw={PRICE_FONT_WEIGHT}>
+          {formatPrice(basePrice, currency)}
+          <Text component="span" size="sm" c="dimmed" fw={400}>
+            {' '}
+            /{period}
+          </Text>
+        </Text>
+      </div>
+      <div>
+        <Text size="sm" c="dimmed" mb="xs">
+          Per Seat
+        </Text>
+        <Text size={fontSize} fw={PRICE_FONT_WEIGHT}>
+          {formatPrice(seatPrice, currency)}
+          <Text component="span" size="sm" c="dimmed" fw={400}>
+            {' '}
+            /seat/{period}
+          </Text>
+        </Text>
+      </div>
+      {totalPrice !== undefined && seatCount && (
+        <div>
+          <Text size="sm" c="dimmed" mb="xs">
+            Total ({seatCount} seats)
+          </Text>
+          <Text size={totalFontSize} fw={PRICE_FONT_WEIGHT} style={{ lineHeight: 1 }}>
+            {formatPrice(totalPrice, currency)}
+            <Text component="span" size="sm" c="dimmed" fw={400}>
+              {' '}
+              /{period === 'year' ? 'month' : period}
+            </Text>
+          </Text>
+        </div>
+      )}
+    </Stack>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/components/PricingBadge.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/components/PricingBadge.tsx
new file mode 100644
index 000000000..af1e68e42
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/components/PricingBadge.tsx
@@ -0,0 +1,24 @@
+import React from 'react';
+import { Badge } from '@mantine/core';
+
+interface PricingBadgeProps {
+  type: 'current' | 'popular' | 'savings';
+  label: string;
+  savingsPercent?: number;
+}
+
+export const PricingBadge: React.FC<PricingBadgeProps> = ({ type, label }) => {
+  const color = type === 'current' || type === 'savings' ? 'green' : 'blue';
+  const size = type === 'savings' ? 'lg' : 'sm';
+
+  return (
+    <Badge
+      color={color}
+      variant="filled"
+      size={size}
+      style={{ position: 'absolute', top: '0.5rem', right: '0.5rem' }}
+    >
+      {label}
+    </Badge>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutNavigation.ts b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutNavigation.ts
new file mode 100644
index 000000000..8ee39b4e9
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutNavigation.ts
@@ -0,0 +1,38 @@
+import { useCallback } from 'react';
+import { CheckoutState, CheckoutStage } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * Stage navigation and history management hook
+ */
+export const useCheckoutNavigation = (
+  state: CheckoutState,
+  setState: React.Dispatch<React.SetStateAction<CheckoutState>>,
+  stageHistory: CheckoutStage[],
+  setStageHistory: React.Dispatch<React.SetStateAction<CheckoutStage[]>>
+) => {
+  const goToStage = useCallback((nextStage: CheckoutStage) => {
+    setStageHistory(prev => [...prev, state.currentStage]);
+    setState(prev => ({ ...prev, currentStage: nextStage }));
+  }, [state.currentStage, setState, setStageHistory]);
+
+  const goBack = useCallback(() => {
+    if (stageHistory.length > 0) {
+      const previousStage = stageHistory[stageHistory.length - 1];
+      setStageHistory(prev => prev.slice(0, -1));
+
+      // Reset payment state when going back from payment stage
+      if (state.currentStage === 'payment') {
+        setState(prev => ({
+          ...prev,
+          currentStage: previousStage,
+          clientSecret: undefined,
+          loading: false
+        }));
+      } else {
+        setState(prev => ({ ...prev, currentStage: previousStage }));
+      }
+    }
+  }, [stageHistory, state.currentStage, setState, setStageHistory]);
+
+  return { goToStage, goBack };
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutSession.ts b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutSession.ts
new file mode 100644
index 000000000..09f7a5d7c
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutSession.ts
@@ -0,0 +1,156 @@
+import { useCallback } from 'react';
+import licenseService, { PlanTier } from '@app/services/licenseService';
+import { resyncExistingLicense } from '@app/utils/licenseCheckoutUtils';
+import { CheckoutState, PollingStatus } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * Checkout session creation and payment handling hook
+ */
+export const useCheckoutSession = (
+  selectedPlan: PlanTier | null,
+  state: CheckoutState,
+  setState: React.Dispatch<React.SetStateAction<CheckoutState>>,
+  installationId: string | null,
+  setInstallationId: React.Dispatch<React.SetStateAction<string | null>>,
+  currentLicenseKey: string | null,
+  setCurrentLicenseKey: React.Dispatch<React.SetStateAction<string | null>>,
+  setPollingStatus: React.Dispatch<React.SetStateAction<PollingStatus>>,
+  minimumSeats: number,
+  pollForLicenseKey: (installId: string) => Promise<void>,
+  onSuccess?: (sessionId: string) => void,
+  onError?: (error: string) => void,
+  onLicenseActivated?: (licenseInfo: {licenseType: string; enabled: boolean; maxUsers: number; hasKey: boolean}) => void
+) => {
+  const createCheckoutSession = useCallback(async () => {
+    if (!selectedPlan) {
+      setState({
+        currentStage: 'error',
+        error: 'Selected plan period is not available',
+        loading: false,
+      });
+      return;
+    }
+
+    try {
+      setState(prev => ({ ...prev, loading: true }));
+
+      // Fetch installation ID from backend
+      let fetchedInstallationId = installationId;
+      if (!fetchedInstallationId) {
+        fetchedInstallationId = await licenseService.getInstallationId();
+        setInstallationId(fetchedInstallationId);
+      }
+
+      // Fetch current license key for upgrades
+      let existingLicenseKey: string | undefined;
+      try {
+        const licenseInfo = await licenseService.getLicenseInfo();
+        if (licenseInfo && licenseInfo.licenseKey) {
+          existingLicenseKey = licenseInfo.licenseKey;
+          setCurrentLicenseKey(existingLicenseKey);
+          console.log('Found existing license for upgrade');
+        }
+      } catch (error) {
+        console.warn('Could not fetch license info, proceeding as new license:', error);
+      }
+
+      const response = await licenseService.createCheckoutSession({
+        lookup_key: selectedPlan.lookupKey,
+        installation_id: fetchedInstallationId,
+        current_license_key: existingLicenseKey,
+        requires_seats: selectedPlan.requiresSeats,
+        seat_count: Math.max(1, Math.min(minimumSeats || 1, 10000)),
+        email: state.email, // Pass collected email from Stage 1
+      });
+
+      // Check if we got a redirect URL (hosted checkout for HTTP)
+      if (response.url) {
+        console.log('Redirecting to Stripe hosted checkout:', response.url);
+        // Redirect to Stripe's hosted checkout page
+        window.location.href = response.url;
+        return;
+      }
+
+      // Otherwise, use embedded checkout (HTTPS)
+      setState(prev => ({
+        ...prev,
+        clientSecret: response.clientSecret,
+        sessionId: response.sessionId,
+        loading: false,
+      }));
+    } catch (err) {
+      const errorMessage =
+        err instanceof Error ? err.message : 'Failed to create checkout session';
+      setState({
+        currentStage: 'error',
+        error: errorMessage,
+        loading: false,
+      });
+      onError?.(errorMessage);
+    }
+  }, [
+    selectedPlan,
+    state.email,
+    installationId,
+    minimumSeats,
+    setState,
+    setInstallationId,
+    setCurrentLicenseKey,
+    onError
+  ]);
+
+  const handlePaymentComplete = useCallback(async () => {
+    // Preserve state when changing stage
+    setState(prev => ({ ...prev, currentStage: 'success' }));
+
+    // Check if this is an upgrade (existing license key) or new plan
+    if (currentLicenseKey) {
+      // UPGRADE FLOW: Resync existing license with Keygen
+      console.log('Upgrade detected - resyncing existing license with Keygen');
+      setPollingStatus('polling');
+
+      const activation = await resyncExistingLicense({
+        isMounted: () => true, // Modal is open, no need to check
+        onActivated: onLicenseActivated,
+      });
+
+      if (activation.success) {
+        console.log(`License upgraded successfully: ${activation.licenseType}`);
+        setPollingStatus('ready');
+      } else {
+        console.error('Failed to sync upgraded license:', activation.error);
+        setPollingStatus('timeout');
+      }
+
+      // Notify parent (don't wait - upgrade is complete)
+      onSuccess?.(state.sessionId || '');
+    } else {
+      // NEW PLAN FLOW: Poll for new license key
+      console.log('New subscription - polling for license key');
+
+      if (installationId) {
+        pollForLicenseKey(installationId).finally(() => {
+          // Only notify parent after polling completes or times out
+          onSuccess?.(state.sessionId || '');
+        });
+      } else {
+        // No installation ID, notify immediately
+        onSuccess?.(state.sessionId || '');
+      }
+    }
+  }, [
+    currentLicenseKey,
+    installationId,
+    state.sessionId,
+    setState,
+    setPollingStatus,
+    pollForLicenseKey,
+    onSuccess,
+    onLicenseActivated
+  ]);
+
+  return {
+    createCheckoutSession,
+    handlePaymentComplete,
+  };
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutState.ts b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutState.ts
new file mode 100644
index 000000000..5c90491e5
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useCheckoutState.ts
@@ -0,0 +1,78 @@
+import { useState, useCallback, useRef } from 'react';
+import { PlanTierGroup } from '@app/services/licenseService';
+import { CheckoutState, PollingStatus, CheckoutStage } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * Centralized state management hook for checkout flow
+ */
+export const useCheckoutState = (planGroup: PlanTierGroup) => {
+  const [state, setState] = useState<CheckoutState>({
+    currentStage: 'email',
+    loading: false
+  });
+  const [stageHistory, setStageHistory] = useState<CheckoutStage[]>([]);
+  const [emailInput, setEmailInput] = useState<string>('');
+  const [emailError, setEmailError] = useState<string>('');
+  const [selectedPeriod, setSelectedPeriod] = useState<'monthly' | 'yearly'>(
+    planGroup.yearly ? 'yearly' : 'monthly'
+  );
+  const [installationId, setInstallationId] = useState<string | null>(null);
+  const [currentLicenseKey, setCurrentLicenseKey] = useState<string | null>(null);
+  const [licenseKey, setLicenseKey] = useState<string | null>(null);
+  const [pollingStatus, setPollingStatus] = useState<PollingStatus>('idle');
+
+  // Refs for polling cleanup
+  const isMountedRef = useRef(true);
+  const pollingTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+
+  // Get the selected plan based on period
+  const selectedPlan = selectedPeriod === 'yearly'
+    ? planGroup.yearly
+    : planGroup.monthly;
+
+  const resetState = useCallback(() => {
+    setState({
+      currentStage: 'email',
+      loading: false,
+      clientSecret: undefined,
+      sessionId: undefined,
+      error: undefined
+    });
+    setStageHistory([]);
+    setEmailInput('');
+    setEmailError('');
+    setPollingStatus('idle');
+    setCurrentLicenseKey(null);
+    setLicenseKey(null);
+    setSelectedPeriod(planGroup.yearly ? 'yearly' : 'monthly');
+  }, [planGroup]);
+
+  return {
+    // State
+    state,
+    setState,
+    stageHistory,
+    setStageHistory,
+    emailInput,
+    setEmailInput,
+    emailError,
+    setEmailError,
+    selectedPeriod,
+    setSelectedPeriod,
+    installationId,
+    setInstallationId,
+    currentLicenseKey,
+    setCurrentLicenseKey,
+    licenseKey,
+    setLicenseKey,
+    pollingStatus,
+    setPollingStatus,
+    // Refs
+    isMountedRef,
+    pollingTimeoutRef,
+    // Computed
+    selectedPlan,
+    // Actions
+    resetState,
+  };
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useLicensePolling.ts b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useLicensePolling.ts
new file mode 100644
index 000000000..0978683f3
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/hooks/useLicensePolling.ts
@@ -0,0 +1,41 @@
+import { useCallback } from 'react';
+import { pollLicenseKeyWithBackoff, activateLicenseKey } from '@app/utils/licenseCheckoutUtils';
+import { PollingStatus } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * License key polling and activation logic hook
+ */
+export const useLicensePolling = (
+  isMountedRef: React.RefObject<boolean>,
+  setPollingStatus: React.Dispatch<React.SetStateAction<PollingStatus>>,
+  setLicenseKey: React.Dispatch<React.SetStateAction<string | null>>,
+  onLicenseActivated?: (licenseInfo: {licenseType: string; enabled: boolean; maxUsers: number; hasKey: boolean}) => void
+) => {
+  const pollForLicenseKey = useCallback(async (installId: string) => {
+    // Use shared polling utility
+    const result = await pollLicenseKeyWithBackoff(installId, {
+      isMounted: () => isMountedRef.current!,
+      onStatusChange: setPollingStatus,
+    });
+
+    if (result.success && result.licenseKey) {
+      setLicenseKey(result.licenseKey);
+
+      // Activate the license key
+      const activation = await activateLicenseKey(result.licenseKey, {
+        isMounted: () => isMountedRef.current!,
+        onActivated: onLicenseActivated,
+      });
+
+      if (!activation.success) {
+        console.error('Failed to activate license key:', activation.error);
+      }
+    } else if (result.timedOut) {
+      console.warn('License key polling timed out');
+    } else if (result.error) {
+      console.error('License key polling failed:', result.error);
+    }
+  }, [isMountedRef, setPollingStatus, setLicenseKey, onLicenseActivated]);
+
+  return { pollForLicenseKey };
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/index.ts b/frontend/src/proprietary/components/shared/stripeCheckout/index.ts
new file mode 100644
index 000000000..bb53480b5
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/index.ts
@@ -0,0 +1,8 @@
+export { default as StripeCheckout } from '@app/components/shared/stripeCheckout/StripeCheckout';
+export type {
+  StripeCheckoutProps,
+  CheckoutStage,
+  CheckoutState,
+  PollingStatus,
+  SavingsCalculation
+} from '@app/components/shared/stripeCheckout/types/checkout';
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/stages/EmailStage.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/stages/EmailStage.tsx
new file mode 100644
index 000000000..c8ff4e415
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/stages/EmailStage.tsx
@@ -0,0 +1,50 @@
+import React from 'react';
+import { Stack, Text, TextInput, Button } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+
+interface EmailStageProps {
+  emailInput: string;
+  setEmailInput: (email: string) => void;
+  emailError: string;
+  onSubmit: () => void;
+}
+
+export const EmailStage: React.FC<EmailStageProps> = ({
+  emailInput,
+  setEmailInput,
+  emailError,
+  onSubmit,
+}) => {
+  const { t } = useTranslation();
+
+  return (
+    <Stack gap="lg" style={{ maxWidth: '500px', margin: '0 auto', padding: '2rem 0' }}>
+      <Text size="sm" c="dimmed">
+        {t('payment.emailStage.description', "We'll use this to send your license key and receipts.")}
+      </Text>
+
+      <TextInput
+        label={t('payment.emailStage.emailLabel', 'Email Address')}
+        placeholder={t('payment.emailStage.emailPlaceholder', 'your@email.com')}
+        value={emailInput}
+        onChange={(e) => setEmailInput(e.currentTarget.value)}
+        error={emailError}
+        size="lg"
+        required
+        onKeyDown={(e) => {
+          if (e.key === 'Enter') {
+            onSubmit();
+          }
+        }}
+      />
+
+      <Button
+        size="lg"
+        onClick={onSubmit}
+        disabled={!emailInput.trim()}
+      >
+        {t('payment.emailStage.continue', 'Continue')}
+      </Button>
+    </Stack>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/stages/ErrorStage.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/stages/ErrorStage.tsx
new file mode 100644
index 000000000..934e75d77
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/stages/ErrorStage.tsx
@@ -0,0 +1,23 @@
+import React from 'react';
+import { Alert, Stack, Text, Button } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+
+interface ErrorStageProps {
+  error: string;
+  onClose: () => void;
+}
+
+export const ErrorStage: React.FC<ErrorStageProps> = ({ error, onClose }) => {
+  const { t } = useTranslation();
+
+  return (
+    <Alert color="red" title={t('payment.error', 'Payment Error')}>
+      <Stack gap="md">
+        <Text size="sm">{error}</Text>
+        <Button variant="outline" onClick={onClose}>
+          {t('common.close', 'Close')}
+        </Button>
+      </Stack>
+    </Alert>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/stages/PaymentStage.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/stages/PaymentStage.tsx
new file mode 100644
index 000000000..9cee1983c
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/stages/PaymentStage.tsx
@@ -0,0 +1,61 @@
+import React from 'react';
+import { Stack, Text, Loader } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import { loadStripe } from '@stripe/stripe-js';
+import { EmbeddedCheckoutProvider, EmbeddedCheckout } from '@stripe/react-stripe-js';
+import { PlanTier } from '@app/services/licenseService';
+
+// Load Stripe once
+const STRIPE_KEY = import.meta.env.VITE_STRIPE_PUBLISHABLE_KEY;
+const stripePromise = STRIPE_KEY ? loadStripe(STRIPE_KEY) : null;
+
+interface PaymentStageProps {
+  clientSecret: string | null;
+  selectedPlan: PlanTier | null;
+  onPaymentComplete: () => void;
+}
+
+export const PaymentStage: React.FC<PaymentStageProps> = ({
+  clientSecret,
+  selectedPlan,
+  onPaymentComplete,
+}) => {
+  const { t } = useTranslation();
+
+  // Show loading while creating checkout session
+  if (!clientSecret || !selectedPlan) {
+    return (
+      <Stack align="center" justify="center" style={{ padding: '2rem 0' }}>
+        <Loader size="lg" />
+        <Text size="sm" c="dimmed" mt="md">
+          {t('payment.preparing', 'Preparing your checkout...')}
+        </Text>
+      </Stack>
+    );
+  }
+
+  if (!stripePromise) {
+    return (
+      <Text size="sm" c="red">
+        Stripe is not configured properly.
+      </Text>
+    );
+  }
+
+  return (
+    <Stack gap="md">
+
+      {/* Stripe Embedded Checkout */}
+      <EmbeddedCheckoutProvider
+        key={clientSecret}
+        stripe={stripePromise}
+        options={{
+          clientSecret: clientSecret,
+          onComplete: onPaymentComplete,
+        }}
+      >
+        <EmbeddedCheckout />
+      </EmbeddedCheckoutProvider>
+    </Stack>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/stages/PlanSelectionStage.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/stages/PlanSelectionStage.tsx
new file mode 100644
index 000000000..f7a6fdb34
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/stages/PlanSelectionStage.tsx
@@ -0,0 +1,165 @@
+import React from 'react';
+import { Stack, Button, Text, Grid, Paper, Alert, Divider } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import { PlanTierGroup } from '@app/services/licenseService';
+import { SavingsCalculation } from '@app/components/shared/stripeCheckout/types/checkout';
+import { PricingBadge } from '@app/components/shared/stripeCheckout/components/PricingBadge';
+import { PriceDisplay } from '@app/components/shared/stripeCheckout/components/PriceDisplay';
+import { formatPrice, calculateMonthlyEquivalent, calculateTotalWithSeats } from '@app/components/shared/stripeCheckout/utils/pricingUtils';
+import { getClickablePaperStyle } from '@app/components/shared/stripeCheckout/utils/cardStyles';
+
+interface PlanSelectionStageProps {
+  planGroup: PlanTierGroup;
+  minimumSeats: number;
+  savings: SavingsCalculation | null;
+  onSelectPlan: (period: 'monthly' | 'yearly') => void;
+}
+
+export const PlanSelectionStage: React.FC<PlanSelectionStageProps> = ({
+  planGroup,
+  minimumSeats,
+  savings,
+  onSelectPlan,
+}) => {
+  const { t } = useTranslation();
+  const isEnterprise = planGroup.tier === 'enterprise';
+  const seatCount = minimumSeats || 1;
+
+  return (
+    <Stack gap="lg" style={{ padding: '1rem 2rem' }}>
+
+        <Grid gutter="xl" style={{ marginTop: '1rem' }}>
+        {/* Monthly Option */}
+        {planGroup.monthly && (
+          <Grid.Col span={6}>
+            <Paper
+              withBorder
+              p="xl"
+              radius="md"
+              style={getClickablePaperStyle()}
+              onClick={() => onSelectPlan('monthly')}
+            >
+              <Stack gap="md" style={{ height: '100%' }} justify="space-between">
+                <Text size="lg" fw={600}>
+                  {t('payment.monthly', 'Monthly')}
+                </Text>
+
+                <Divider />
+
+                {isEnterprise && planGroup.monthly.seatPrice ? (
+                  <PriceDisplay
+                    mode="enterprise"
+                    basePrice={planGroup.monthly.price}
+                    seatPrice={planGroup.monthly.seatPrice}
+                    totalPrice={calculateTotalWithSeats(planGroup.monthly.price, planGroup.monthly.seatPrice, seatCount)}
+                    currency={planGroup.monthly.currency}
+                    period="month"
+                    seatCount={seatCount}
+                    size="sm"
+                  />
+                ) : (
+                  <PriceDisplay
+                    mode="simple"
+                    price={planGroup.monthly?.price || 0}
+                    currency={planGroup.monthly?.currency || '£'}
+                    period={t('payment.perMonth', '/month')}
+                    size="2.5rem"
+                  />
+                )}
+
+                <div style={{ marginTop: 'auto', paddingTop: '1rem' }}>
+                  <Button variant="light" fullWidth size="lg">
+                    {t('payment.planStage.selectMonthly', 'Select Monthly')}
+                  </Button>
+                </div>
+              </Stack>
+            </Paper>
+          </Grid.Col>
+        )}
+
+        {/* Yearly Option */}
+        {planGroup.yearly && (
+          <Grid.Col span={6}>
+            <Paper
+              withBorder
+              p="xl"
+              radius="md"
+              style={getClickablePaperStyle(!!savings)}
+              onClick={() => onSelectPlan('yearly')}
+            >
+              {savings && (
+                <PricingBadge
+                  type="savings"
+                  label={t('payment.planStage.savePercent', 'Save {{percent}}%', { percent: savings.percent })}
+                />
+              )}
+
+              <Stack gap="md" style={{ height: '100%' }} justify="space-between">
+                <Text size="lg" fw={600}>
+                  {t('payment.yearly', 'Yearly')}
+                </Text>
+
+                <Divider />
+
+                {isEnterprise && planGroup.yearly.seatPrice ? (
+                  <Stack gap="sm">
+                    <PriceDisplay
+                      mode="enterprise"
+                      basePrice={planGroup.yearly.price}
+                      seatPrice={planGroup.yearly.seatPrice}
+                      totalPrice={calculateMonthlyEquivalent(
+                        calculateTotalWithSeats(planGroup.yearly.price, planGroup.yearly.seatPrice, seatCount)
+                      )}
+                      currency={planGroup.yearly.currency}
+                      period="year"
+                      seatCount={seatCount}
+                      size="sm"
+                    />
+                    <Text size="sm" c="dimmed">
+                      {t('payment.planStage.billedYearly', 'Billed yearly at {{currency}}{{amount}}', {
+                        currency: planGroup.yearly.currency,
+                        amount: calculateTotalWithSeats(planGroup.yearly.price, planGroup.yearly.seatPrice, seatCount).toFixed(2)
+                      })}
+                    </Text>
+                  </Stack>
+                ) : (
+                  <Stack gap={0}>
+                    <PriceDisplay
+                      mode="simple"
+                      price={calculateMonthlyEquivalent(planGroup.yearly?.price || 0)}
+                      currency={planGroup.yearly?.currency || '£'}
+                      period={t('payment.perMonth', '/month')}
+                      size="2.5rem"
+                    />
+                    <Text size="sm" c="dimmed" mt="xs">
+                      {t('payment.planStage.billedYearly', 'Billed yearly at {{currency}}{{amount}}', {
+                        currency: planGroup.yearly?.currency,
+                        amount: planGroup.yearly?.price.toFixed(2)
+                      })}
+                    </Text>
+                  </Stack>
+                )}
+
+                {savings && (
+                  <Alert color="green" variant="light" p="sm">
+                    <Text size="sm" fw={600}>
+                      {t('payment.planStage.savingsAmount', 'You save {{amount}}', {
+                        amount: formatPrice(savings.amount, savings.currency)
+                      })}
+                    </Text>
+                  </Alert>
+                )}
+
+                <div style={{ marginTop: 'auto', paddingTop: '1rem' }}>
+                  <Button variant="filled" fullWidth size="lg">
+                    {t('payment.planStage.selectYearly', 'Select Yearly')}
+                  </Button>
+                </div>
+              </Stack>
+            </Paper>
+          </Grid.Col>
+        )}
+      </Grid>
+    </Stack>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/stages/SuccessStage.tsx b/frontend/src/proprietary/components/shared/stripeCheckout/stages/SuccessStage.tsx
new file mode 100644
index 000000000..0d75db3c6
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/stages/SuccessStage.tsx
@@ -0,0 +1,101 @@
+import React from 'react';
+import { Alert, Stack, Text, Paper, Code, Button, Group, Loader } from '@mantine/core';
+import { useTranslation } from 'react-i18next';
+import { PollingStatus } from '@app/components/shared/stripeCheckout/types/checkout';
+
+interface SuccessStageProps {
+  pollingStatus: PollingStatus;
+  currentLicenseKey: string | null;
+  licenseKey: string | null;
+  onClose: () => void;
+}
+
+export const SuccessStage: React.FC<SuccessStageProps> = ({
+  pollingStatus,
+  currentLicenseKey,
+  licenseKey,
+  onClose,
+}) => {
+  const { t } = useTranslation();
+
+  return (
+    <Alert color="green" title={t('payment.success', 'Payment Successful!')}>
+      <Stack gap="md">
+        <Text size="sm">
+          {t(
+            'payment.successMessage',
+            'Your subscription has been activated successfully.'
+          )}
+        </Text>
+
+        {/* License Key Polling Status */}
+        {pollingStatus === 'polling' && (
+          <Group gap="xs">
+            <Loader size="sm" />
+            <Text size="sm" c="dimmed">
+              {currentLicenseKey
+                ? t('payment.syncingLicense', 'Syncing your upgraded license...')
+                : t('payment.generatingLicense', 'Generating your license key...')}
+            </Text>
+          </Group>
+        )}
+
+        {pollingStatus === 'ready' && !currentLicenseKey && licenseKey && (
+          <Paper withBorder p="md" radius="md" bg="gray.1">
+            <Stack gap="sm">
+              <Text size="sm" fw={600}>
+                {t('payment.licenseKey', 'Your License Key')}
+              </Text>
+              <Code block>{licenseKey}</Code>
+              <Button
+                variant="light"
+                size="sm"
+                onClick={() => navigator.clipboard.writeText(licenseKey)}
+              >
+                {t('common.copy', 'Copy to Clipboard')}
+              </Button>
+              <Text size="xs" c="dimmed">
+                {t(
+                  'payment.licenseInstructions',
+                  'This has been added to your installation. You will receive a copy in your email as well.'
+                )}
+              </Text>
+            </Stack>
+          </Paper>
+        )}
+
+        {pollingStatus === 'ready' && currentLicenseKey && (
+          <Alert color="green" title={t('payment.upgradeComplete', 'Upgrade Complete')}>
+            <Text size="sm">
+              {t(
+                'payment.upgradeCompleteMessage',
+                'Your subscription has been upgraded successfully. Your existing license key has been updated.'
+              )}
+            </Text>
+          </Alert>
+        )}
+
+        {pollingStatus === 'timeout' && (
+          <Alert color="yellow" title={t('payment.licenseDelayed', 'License Key Processing')}>
+            <Text size="sm">
+              {t(
+                'payment.licenseDelayedMessage',
+                'Your license key is being generated. Please check your email shortly or contact support.'
+              )}
+            </Text>
+          </Alert>
+        )}
+
+        {pollingStatus === 'ready' && (
+          <Text size="xs" c="dimmed">
+            {t('payment.canCloseWindow', 'You can now close this window.')}
+          </Text>
+        )}
+
+        <Button onClick={onClose} mt="md">
+          {t('common.close', 'Close')}
+        </Button>
+      </Stack>
+    </Alert>
+  );
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/types/checkout.ts b/frontend/src/proprietary/components/shared/stripeCheckout/types/checkout.ts
new file mode 100644
index 000000000..94d94e24e
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/types/checkout.ts
@@ -0,0 +1,34 @@
+import { PlanTierGroup } from '@app/services/licenseService';
+
+export interface StripeCheckoutProps {
+  opened: boolean;
+  onClose: () => void;
+  planGroup: PlanTierGroup;
+  minimumSeats?: number;
+  onSuccess?: (sessionId: string) => void;
+  onError?: (error: string) => void;
+  onLicenseActivated?: (licenseInfo: {licenseType: string; enabled: boolean; maxUsers: number; hasKey: boolean}) => void;
+  hostedCheckoutSuccess?: {
+    isUpgrade: boolean;
+    licenseKey?: string;
+  } | null;
+}
+
+export type CheckoutStage = 'email' | 'plan-selection' | 'payment' | 'success' | 'error';
+
+export type CheckoutState = {
+  currentStage: CheckoutStage;
+  email?: string;
+  clientSecret?: string;
+  error?: string;
+  sessionId?: string;
+  loading?: boolean;
+};
+
+export type PollingStatus = 'idle' | 'polling' | 'ready' | 'timeout';
+
+export interface SavingsCalculation {
+  amount: number;
+  percent: number;
+  currency: string;
+}
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/utils/cardStyles.ts b/frontend/src/proprietary/components/shared/stripeCheckout/utils/cardStyles.ts
new file mode 100644
index 000000000..ac4961436
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/utils/cardStyles.ts
@@ -0,0 +1,44 @@
+import { CSSProperties } from 'react';
+
+/**
+ * Shared styling utilities for plan cards
+ */
+
+export const CARD_MIN_HEIGHT = '400px';
+export const PRICE_FONT_WEIGHT = 600;
+
+/**
+ * Get card border style based on state
+ */
+export function getCardBorderStyle(isHighlighted: boolean): CSSProperties {
+  return {
+    borderColor: isHighlighted ? 'var(--mantine-color-green-6)' : undefined,
+    borderWidth: isHighlighted ? '2px' : undefined,
+  };
+}
+
+/**
+ * Get base card style
+ */
+export function getBaseCardStyle(isHighlighted: boolean = false): CSSProperties {
+  return {
+    position: 'relative',
+    display: 'flex',
+    flexDirection: 'column',
+    minHeight: CARD_MIN_HEIGHT,
+    ...getCardBorderStyle(isHighlighted),
+  };
+}
+
+/**
+ * Get clickable paper style
+ */
+export function getClickablePaperStyle(isHighlighted: boolean = false): CSSProperties {
+  return {
+    cursor: 'pointer',
+    transition: 'all 0.2s',
+    height: '100%',
+    position: 'relative',
+    ...getCardBorderStyle(isHighlighted),
+  };
+}
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/utils/checkoutUtils.ts b/frontend/src/proprietary/components/shared/stripeCheckout/utils/checkoutUtils.ts
new file mode 100644
index 000000000..3be3fa555
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/utils/checkoutUtils.ts
@@ -0,0 +1,40 @@
+import { TFunction } from 'i18next';
+import { CheckoutStage } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * Validate email address format
+ */
+export const validateEmail = (email: string): { valid: boolean; error: string } => {
+  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+  if (!emailRegex.test(email)) {
+    return {
+      valid: false,
+      error: 'Please enter a valid email address'
+    };
+  }
+  return { valid: true, error: '' };
+};
+
+/**
+ * Get dynamic modal title based on current stage
+ */
+export const getModalTitle = (
+  stage: CheckoutStage,
+  planName: string,
+  t: TFunction
+): string => {
+  switch (stage) {
+    case 'email':
+      return t('payment.emailStage.modalTitle', 'Get Started - {{planName}}', { planName });
+    case 'plan-selection':
+      return t('payment.planStage.modalTitle', 'Select Billing Period - {{planName}}', { planName });
+    case 'payment':
+      return t('payment.paymentStage.modalTitle', 'Complete Payment - {{planName}}', { planName });
+    case 'success':
+      return t('payment.success', 'Payment Successful!');
+    case 'error':
+      return t('payment.error', 'Payment Error');
+    default:
+      return t('payment.upgradeTitle', 'Upgrade to {{planName}}', { planName });
+  }
+};
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/utils/pricingUtils.ts b/frontend/src/proprietary/components/shared/stripeCheckout/utils/pricingUtils.ts
new file mode 100644
index 000000000..9fc5c8416
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/utils/pricingUtils.ts
@@ -0,0 +1,60 @@
+/**
+ * Shared pricing utilities for plan cards and checkout
+ */
+
+export interface PriceCalculation {
+  displayPrice: number;
+  displaySeatPrice?: number;
+  displayCurrency: string;
+}
+
+/**
+ * Calculate monthly equivalent from yearly price
+ */
+export function calculateMonthlyEquivalent(yearlyPrice: number): number {
+  return yearlyPrice / 12;
+}
+
+/**
+ * Calculate total price including seats
+ */
+export function calculateTotalWithSeats(
+  basePrice: number,
+  seatPrice: number | undefined,
+  seatCount: number
+): number {
+  if (seatPrice === undefined) return basePrice;
+  return basePrice + seatPrice * seatCount;
+}
+
+/**
+ * Format price with currency symbol
+ */
+export function formatPrice(amount: number, currency: string, decimals: number = 2): string {
+  return `${currency}${amount.toFixed(decimals)}`;
+}
+
+/**
+ * Calculate display pricing for a plan, showing yearly price divided by 12
+ * to show the lowest monthly equivalent
+ */
+export function calculateDisplayPricing(
+  monthly?: { price: number; seatPrice?: number; currency: string },
+  yearly?: { price: number; seatPrice?: number; currency: string }
+): PriceCalculation {
+  // Default to monthly if no yearly exists
+  if (!yearly) {
+    return {
+      displayPrice: monthly?.price || 0,
+      displaySeatPrice: monthly?.seatPrice,
+      displayCurrency: monthly?.currency || '£',
+    };
+  }
+
+  // Use yearly price divided by 12 for best value display
+  return {
+    displayPrice: calculateMonthlyEquivalent(yearly.price),
+    displaySeatPrice: yearly.seatPrice ? calculateMonthlyEquivalent(yearly.seatPrice) : undefined,
+    displayCurrency: yearly.currency,
+  };
+}
diff --git a/frontend/src/proprietary/components/shared/stripeCheckout/utils/savingsCalculator.ts b/frontend/src/proprietary/components/shared/stripeCheckout/utils/savingsCalculator.ts
new file mode 100644
index 000000000..3a0b4d6c8
--- /dev/null
+++ b/frontend/src/proprietary/components/shared/stripeCheckout/utils/savingsCalculator.ts
@@ -0,0 +1,38 @@
+import { PlanTierGroup } from '@app/services/licenseService';
+import { SavingsCalculation } from '@app/components/shared/stripeCheckout/types/checkout';
+
+/**
+ * Calculate savings for yearly vs monthly plans
+ * Returns null if both monthly and yearly plans are not available
+ */
+export const calculateSavings = (
+  planGroup: PlanTierGroup,
+  minimumSeats: number
+): SavingsCalculation | null => {
+  if (!planGroup.yearly || !planGroup.monthly) return null;
+
+  const isEnterprise = planGroup.tier === 'enterprise';
+  const seatCount = minimumSeats || 1;
+
+  let monthlyAnnual: number;
+  let yearlyTotal: number;
+
+  if (isEnterprise && planGroup.monthly.seatPrice && planGroup.yearly.seatPrice) {
+    // Enterprise: (base + seats) * 12 vs (base + seats) yearly
+    monthlyAnnual = (planGroup.monthly.price + (planGroup.monthly.seatPrice * seatCount)) * 12;
+    yearlyTotal = planGroup.yearly.price + (planGroup.yearly.seatPrice * seatCount);
+  } else {
+    // Server: price * 12 vs yearly price
+    monthlyAnnual = planGroup.monthly.price * 12;
+    yearlyTotal = planGroup.yearly.price;
+  }
+
+  const savings = monthlyAnnual - yearlyTotal;
+  const savingsPercent = Math.round((savings / monthlyAnnual) * 100);
+
+  return {
+    amount: savings,
+    percent: savingsPercent,
+    currency: planGroup.yearly.currency
+  };
+};
diff --git a/frontend/src/proprietary/constants/planConstants.ts b/frontend/src/proprietary/constants/planConstants.ts
index 1865238df..ab14a2c55 100644
--- a/frontend/src/proprietary/constants/planConstants.ts
+++ b/frontend/src/proprietary/constants/planConstants.ts
@@ -74,12 +74,14 @@ export const PLAN_HIGHLIGHTS = {
     'Self-hosted on your infrastructure',
     'Unlimited users',
     'Advanced integrations',
+    'Editing text in PDFs',
     'Cancel anytime'
   ],
   SERVER_YEARLY: [
     'Self-hosted on your infrastructure',
     'Unlimited users',
     'Advanced integrations',
+    'Editing text in PDFs',
     'Save with annual billing'
   ],
   ENTERPRISE_MONTHLY: [
diff --git a/frontend/src/proprietary/contexts/CheckoutContext.tsx b/frontend/src/proprietary/contexts/CheckoutContext.tsx
index f8558a650..13f753199 100644
--- a/frontend/src/proprietary/contexts/CheckoutContext.tsx
+++ b/frontend/src/proprietary/contexts/CheckoutContext.tsx
@@ -2,16 +2,17 @@ import React, { createContext, useContext, useState, useCallback, useEffect, Rea
 import { useTranslation } from 'react-i18next';
 import { usePlans } from '@app/hooks/usePlans';
 import licenseService, { PlanTierGroup, LicenseInfo, mapLicenseToTier } from '@app/services/licenseService';
-import StripeCheckout from '@app/components/shared/StripeCheckout';
+import { StripeCheckout } from '@app/components/shared/stripeCheckout';
 import { userManagementService } from '@app/services/userManagementService';
 import { alert } from '@app/components/toast';
 import { pollLicenseKeyWithBackoff, activateLicenseKey, resyncExistingLicense } from '@app/utils/licenseCheckoutUtils';
 import { useLicense } from '@app/contexts/LicenseContext';
 import { isSupabaseConfigured } from '@app/services/supabaseClient';
+import { getPreferredCurrency } from '@app/utils/currencyDetection';
 
 export interface CheckoutOptions {
   minimumSeats?: number;      // Override calculated seats for enterprise
-  currency?: string;          // Optional currency override (defaults to 'gbp')
+  currency?: string;          // Optional currency override (auto-detected from locale)
   onSuccess?: (sessionId: string) => void;  // Callback after successful payment
   onError?: (error: string) => void;  // Callback on error
 }
@@ -35,15 +36,18 @@ interface CheckoutProviderProps {
 
 export const CheckoutProvider: React.FC<CheckoutProviderProps> = ({
   children,
-  defaultCurrency = 'gbp'
+  defaultCurrency
 }) => {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
   const { refetchLicense } = useLicense();
   const [isOpen, setIsOpen] = useState(false);
   const [isLoading, setIsLoading] = useState(false);
   const [selectedPlanGroup, setSelectedPlanGroup] = useState<PlanTierGroup | null>(null);
   const [minimumSeats, setMinimumSeats] = useState<number>(1);
-  const [currentCurrency, setCurrentCurrency] = useState(defaultCurrency);
+  const [currentCurrency, setCurrentCurrency] = useState(() => {
+    // Use provided default or auto-detect from locale
+    return defaultCurrency || getPreferredCurrency(i18n.language);
+  });
   const [currentOptions, setCurrentOptions] = useState<CheckoutOptions>({});
   const [hostedCheckoutSuccess, setHostedCheckoutSuccess] = useState<{
     isUpgrade: boolean;
diff --git a/frontend/src/proprietary/contexts/LicenseContext.tsx b/frontend/src/proprietary/contexts/LicenseContext.tsx
index 9414dcf5d..a76596c2e 100644
--- a/frontend/src/proprietary/contexts/LicenseContext.tsx
+++ b/frontend/src/proprietary/contexts/LicenseContext.tsx
@@ -1,4 +1,4 @@
-import React, { createContext, useContext, useState, useCallback, useEffect, ReactNode } from 'react';
+import React, { createContext, useContext, useState, useCallback, useEffect, useMemo, useRef, ReactNode } from 'react';
 import licenseService, { LicenseInfo } from '@app/services/licenseService';
 import { useAppConfig } from '@app/contexts/AppConfigContext';
 
@@ -17,18 +17,45 @@ interface LicenseProviderProps {
 
 export const LicenseProvider: React.FC<LicenseProviderProps> = ({ children }) => {
   const { config } = useAppConfig();
+  const configRef = useRef(config);
   const [licenseInfo, setLicenseInfo] = useState<LicenseInfo | null>(null);
   const [loading, setLoading] = useState<boolean>(true);
   const [error, setError] = useState<string | null>(null);
 
+  // Keep ref updated with latest config
+  useEffect(() => {
+    configRef.current = config;
+  }, [config]);
+
   const refetchLicense = useCallback(async () => {
+    // Wait for config to load if it's not available yet
+    let currentConfig = configRef.current;
+    if (!currentConfig) {
+      console.log('[LicenseContext] Config not loaded yet, waiting...');
+      // Wait up to 5 seconds for config to load
+      const maxWait = 5000;
+      const startTime = Date.now();
+      while (!configRef.current && Date.now() - startTime < maxWait) {
+        await new Promise(resolve => setTimeout(resolve, 100));
+        currentConfig = configRef.current;
+      }
+
+      if (!currentConfig) {
+        console.error('[LicenseContext] Config failed to load after waiting');
+        setLoading(false);
+        return;
+      }
+    }
+
     // Only fetch license info if user is an admin
-    if (!config?.isAdmin) {
-      console.debug('[LicenseContext] User is not an admin, skipping license fetch');
+    if (!currentConfig.isAdmin) {
+      console.log('[LicenseContext] User is not an admin, skipping license fetch');
       setLoading(false);
       return;
     }
 
+    console.log('[LicenseContext] Fetching license info');
+
     try {
       setLoading(true);
       setError(null);
@@ -42,7 +69,7 @@ export const LicenseProvider: React.FC<LicenseProviderProps> = ({ children }) =>
     } finally {
       setLoading(false);
     }
-  }, [config?.isAdmin]);
+  }, []);
 
   // Fetch license info when config changes (only if user is admin)
   useEffect(() => {
@@ -51,12 +78,15 @@ export const LicenseProvider: React.FC<LicenseProviderProps> = ({ children }) =>
     }
   }, [config, refetchLicense]);
 
-  const contextValue: LicenseContextValue = {
-    licenseInfo,
-    loading,
-    error,
-    refetchLicense,
-  };
+  const contextValue: LicenseContextValue = useMemo(
+    () => ({
+      licenseInfo,
+      loading,
+      error,
+      refetchLicense,
+    }),
+    [licenseInfo, loading, error, refetchLicense]
+  );
 
   return (
     <LicenseContext.Provider value={contextValue}>
diff --git a/frontend/src/proprietary/contexts/UpdateSeatsContext.tsx b/frontend/src/proprietary/contexts/UpdateSeatsContext.tsx
new file mode 100644
index 000000000..7d3550eeb
--- /dev/null
+++ b/frontend/src/proprietary/contexts/UpdateSeatsContext.tsx
@@ -0,0 +1,222 @@
+import React, { createContext, useContext, useState, useCallback, useEffect, ReactNode } from 'react';
+import { useTranslation } from 'react-i18next';
+import licenseService, {} from '@app/services/licenseService';
+import UpdateSeatsModal from '@app/components/shared/UpdateSeatsModal';
+import { userManagementService } from '@app/services/userManagementService';
+import { alert } from '@app/components/toast';
+import { useLicense } from '@app/contexts/LicenseContext';
+import { resyncExistingLicense } from '@app/utils/licenseCheckoutUtils';
+
+export interface UpdateSeatsOptions {
+  onSuccess?: () => void;
+  onError?: (error: string) => void;
+}
+
+interface UpdateSeatsContextValue {
+  openUpdateSeats: (options?: UpdateSeatsOptions) => Promise<void>;
+  closeUpdateSeats: () => void;
+  isOpen: boolean;
+  isLoading: boolean;
+}
+
+const UpdateSeatsContext = createContext<UpdateSeatsContextValue | undefined>(undefined);
+
+interface UpdateSeatsProviderProps {
+  children: ReactNode;
+}
+
+export const UpdateSeatsProvider: React.FC<UpdateSeatsProviderProps> = ({ children }) => {
+  const { t } = useTranslation();
+  const { refetchLicense } = useLicense();
+  const [isOpen, setIsOpen] = useState(false);
+  const [isLoading, setIsLoading] = useState(false);
+  const [currentSeats, setCurrentSeats] = useState<number>(1);
+  const [minimumSeats, setMinimumSeats] = useState<number>(1);
+  const [currentOptions, setCurrentOptions] = useState<UpdateSeatsOptions>({});
+
+  // Handle return from Stripe billing portal
+  useEffect(() => {
+    const handleBillingReturn = async () => {
+      const urlParams = new URLSearchParams(window.location.search);
+      const seatsUpdated = urlParams.get('seats_updated');
+
+      if (seatsUpdated === 'true') {
+        console.log('Seats updated successfully, syncing license with Keygen');
+
+        // Clear URL parameters
+        window.history.replaceState({}, '', window.location.pathname);
+
+        try {
+          // Wait a moment for Stripe webhook to process
+          await new Promise(resolve => setTimeout(resolve, 2000));
+
+          // Resync license with Keygen (not just local fetch)
+          console.log('Seat update detected - resyncing license with Keygen');
+          const activation = await resyncExistingLicense();
+
+          if (activation.success) {
+            console.log('License synced successfully after seat update');
+
+            // Refresh global license context
+            await refetchLicense();
+
+            // Get updated license info for notification
+            const updatedLicense = await licenseService.getLicenseInfo();
+
+            alert({
+              alertType: 'success',
+              title: t('billing.seatsUpdated', 'Seats Updated'),
+              body: t(
+                'billing.seatsUpdatedMessage',
+                'Your enterprise seats have been updated to {{seats}}',
+                { seats: updatedLicense.maxUsers }
+              ),
+            });
+          } else {
+            throw new Error(activation.error || 'Failed to sync license');
+          }
+        } catch (error) {
+          console.error('Failed to sync license after seat update:', error);
+          alert({
+            alertType: 'warning',
+            title: t('billing.updateProcessing', 'Update Processing'),
+            body: t(
+              'billing.updateProcessingMessage',
+              'Your seat update is being processed. Please refresh in a few moments.'
+            ),
+          });
+        }
+      }
+    };
+
+    handleBillingReturn();
+  }, [t, refetchLicense]);
+
+  const openUpdateSeats = useCallback(async (options: UpdateSeatsOptions = {}) => {
+    try {
+      setIsLoading(true);
+
+      // Fetch current license info and user count
+      const [licenseInfo, userData] = await Promise.all([
+        licenseService.getLicenseInfo(),
+        userManagementService.getUsers(),
+      ]);
+
+      // Validate this is an enterprise license
+      if (!licenseInfo || licenseInfo.licenseType !== 'ENTERPRISE') {
+        throw new Error(
+          t('billing.notEnterprise', 'Seat management is only available for enterprise licenses')
+        );
+      }
+
+      const currentLicenseSeats = licenseInfo.maxUsers || 1;
+      const currentUserCount = userData.totalUsers || 0;
+
+      // Minimum seats must be at least the current number of users
+      const calculatedMinSeats = Math.max(currentUserCount, 1);
+
+      console.log(
+        `Opening seat update: current seats=${currentLicenseSeats}, current users=${currentUserCount}, minimum=${calculatedMinSeats}`
+      );
+
+      setCurrentSeats(currentLicenseSeats);
+      setMinimumSeats(calculatedMinSeats);
+      setCurrentOptions(options);
+      setIsOpen(true);
+    } catch (err) {
+      const errorMessage =
+        err instanceof Error ? err.message : 'Failed to open seat update';
+      console.error('Error opening seat update:', errorMessage);
+      alert({
+        alertType: 'error',
+        title: t('common.error', 'Error'),
+        body: errorMessage,
+      });
+      options.onError?.(errorMessage);
+    } finally {
+      setIsLoading(false);
+    }
+  }, [t]);
+
+  const closeUpdateSeats = useCallback(() => {
+    setIsOpen(false);
+    setCurrentOptions({});
+
+    // Refetch license after modal closes to update UI
+    refetchLicense();
+  }, [refetchLicense]);
+
+  const handleUpdateSeats = useCallback(
+    async (newSeatCount: number): Promise<string> => {
+      try {
+        // Get current license key
+        const licenseInfo = await licenseService.getLicenseInfo();
+        if (!licenseInfo?.licenseKey) {
+          throw new Error('No license key found');
+        }
+
+        console.log(`Updating seats from ${currentSeats} to ${newSeatCount}`);
+
+        // Call manage-billing function with new seat count
+        const portalUrl = await licenseService.updateEnterpriseSeats(
+          newSeatCount,
+          licenseInfo.licenseKey
+        );
+
+        return portalUrl;
+      } catch (err) {
+        const errorMessage =
+          err instanceof Error ? err.message : 'Failed to update seats';
+        console.error('Error updating seats:', errorMessage);
+        currentOptions.onError?.(errorMessage);
+        throw err;
+      }
+    },
+    [currentSeats, currentOptions]
+  );
+
+  const handleSuccess = useCallback(() => {
+    console.log('Seat update initiated successfully');
+    currentOptions.onSuccess?.();
+  }, [currentOptions]);
+
+  const handleError = useCallback(
+    (error: string) => {
+      console.error('Seat update error:', error);
+      currentOptions.onError?.(error);
+    },
+    [currentOptions]
+  );
+
+  return (
+    <UpdateSeatsContext.Provider
+      value={{
+        openUpdateSeats,
+        closeUpdateSeats,
+        isOpen,
+        isLoading,
+      }}
+    >
+      {children}
+      <UpdateSeatsModal
+        opened={isOpen}
+        onClose={closeUpdateSeats}
+        currentSeats={currentSeats}
+        minimumSeats={minimumSeats}
+        _onSuccess={handleSuccess}
+        onError={handleError}
+        onUpdateSeats={handleUpdateSeats}
+      />
+    </UpdateSeatsContext.Provider>
+  );
+};
+
+export const useUpdateSeats = (): UpdateSeatsContextValue => {
+  const context = useContext(UpdateSeatsContext);
+  if (!context) {
+    throw new Error('useUpdateSeats must be used within an UpdateSeatsProvider');
+  }
+  return context;
+};
+
+export default UpdateSeatsContext;
diff --git a/frontend/src/proprietary/services/licenseService.ts b/frontend/src/proprietary/services/licenseService.ts
index 409dbfd74..819cbff70 100644
--- a/frontend/src/proprietary/services/licenseService.ts
+++ b/frontend/src/proprietary/services/licenseService.ts
@@ -43,6 +43,7 @@ export interface CheckoutSessionRequest {
   current_license_key?: string; // Current license key for upgrades
   requires_seats?: boolean; // Whether to add adjustable seat pricing
   seat_count?: number;      // Initial number of seats for enterprise plans (user can adjust in Stripe UI)
+  email?: string;           // Customer email for checkout pre-fill
   successUrl?: string;
   cancelUrl?: string;
 }
@@ -109,7 +110,7 @@ const licenseService = {
   /**
    * Get available plans with pricing for the specified currency
    */
-  async getPlans(currency: string = 'gbp'): Promise<PlansResponse> {
+  async getPlans(currency: string = 'usd'): Promise<PlansResponse> {
     try {
       // Check if Supabase is configured
       if (!isSupabaseConfigured || !supabase) {
@@ -320,6 +321,7 @@ const licenseService = {
         current_license_key: request.current_license_key,
         requires_seats: request.requires_seats,
         seat_count: request.seat_count || 1,
+        email: request.email,
         callback_base_url: baseUrl,
         ui_mode: checkoutMode,
         // For hosted checkout, provide success/cancel URLs
@@ -443,6 +445,42 @@ const licenseService = {
       throw error;
     }
   },
+
+  /**
+   * Update enterprise seat count
+   * Creates a Stripe billing portal session for confirming seat changes
+   * @param newSeatCount - New number of seats
+   * @param licenseKey - Current license key for authentication
+   * @returns Billing portal URL for confirming the change
+   */
+  async updateEnterpriseSeats(newSeatCount: number, licenseKey: string): Promise<string> {
+    // Check if Supabase is configured
+    if (!isSupabaseConfigured || !supabase) {
+      throw new Error('Supabase is not configured. Seat updates are not available.');
+    }
+
+    const baseUrl = window.location.origin;
+    const returnUrl = `${baseUrl}/settings/adminPlan?seats_updated=true`;
+
+    const { data, error } = await supabase.functions.invoke('manage-billing', {
+      body: {
+        return_url: returnUrl,
+        license_key: licenseKey,
+        self_hosted: true,
+        new_seat_count: newSeatCount,
+      },
+    });
+
+    if (error) {
+      throw new Error(`Failed to update seat count: ${error.message}`);
+    }
+
+    if (!data || !data.url) {
+      throw new Error('No billing portal URL returned');
+    }
+
+    return data.url;
+  },
 };
 
 /**
diff --git a/frontend/src/proprietary/utils/currencyDetection.ts b/frontend/src/proprietary/utils/currencyDetection.ts
new file mode 100644
index 000000000..408002a93
--- /dev/null
+++ b/frontend/src/proprietary/utils/currencyDetection.ts
@@ -0,0 +1,142 @@
+/**
+ * Currency detection utility
+ * Auto-detects user's preferred currency from browser locale
+ */
+
+const STORAGE_KEY = 'preferredCurrency';
+
+/**
+ * Map of locale codes to currency codes
+ * Covers all major locales and their corresponding currencies
+ */
+const LOCALE_TO_CURRENCY_MAP: Record<string, string> = {
+  // English variants
+  'en-US': 'usd',
+  'en-CA': 'usd',
+  'en-AU': 'usd',
+  'en-NZ': 'usd',
+  'en-GB': 'gbp',
+  'en-IE': 'eur',
+
+  // European locales - Euro
+  'de-DE': 'eur',
+  'de-AT': 'eur',
+  'de-CH': 'eur',
+  'fr-FR': 'eur',
+  'fr-BE': 'eur',
+  'fr-CH': 'eur',
+  'it-IT': 'eur',
+  'es-ES': 'eur',
+  'pt-PT': 'eur',
+  'nl-NL': 'eur',
+  'nl-BE': 'eur',
+  'pl-PL': 'eur',
+  'ro-RO': 'eur',
+  'el-GR': 'eur',
+  'fi-FI': 'eur',
+  'sv-SE': 'eur',
+  'da-DK': 'eur',
+  'no-NO': 'eur',
+
+  // Chinese variants
+  'zh-CN': 'cny',
+  'zh-TW': 'cny',
+  'zh-HK': 'cny',
+  'zh-SG': 'cny',
+
+  // Indian locales
+  'hi-IN': 'inr',
+  'en-IN': 'inr',
+  'bn-IN': 'inr',
+  'te-IN': 'inr',
+  'ta-IN': 'inr',
+  'mr-IN': 'inr',
+
+  // Brazilian Portuguese
+  'pt-BR': 'brl',
+
+  // Indonesian
+  'id-ID': 'idr',
+  'jv-ID': 'idr',
+
+  // Other major locales defaulting to USD
+  'ja-JP': 'usd',
+  'ko-KR': 'usd',
+  'ru-RU': 'usd',
+  'ar-SA': 'usd',
+  'th-TH': 'usd',
+  'vi-VN': 'usd',
+  'tr-TR': 'usd',
+};
+
+/**
+ * Detect currency from browser locale
+ * @param locale - Browser locale string (e.g., 'en-US', 'de-DE')
+ * @returns Currency code ('usd', 'gbp', 'eur', etc.)
+ */
+export function detectCurrencyFromLocale(locale: string): string {
+  // Try exact match first
+  if (LOCALE_TO_CURRENCY_MAP[locale]) {
+    return LOCALE_TO_CURRENCY_MAP[locale];
+  }
+
+  // Try matching just the language code (e.g., 'en' from 'en-US')
+  const languageCode = locale.split('-')[0];
+  const matchingLocale = Object.keys(LOCALE_TO_CURRENCY_MAP).find(
+    key => key.startsWith(languageCode)
+  );
+
+  if (matchingLocale) {
+    return LOCALE_TO_CURRENCY_MAP[matchingLocale];
+  }
+
+  // Default fallback to USD
+  return 'usd';
+}
+
+/**
+ * Get cached currency preference from localStorage
+ * @returns Cached currency code or null if not set
+ */
+export function getCachedCurrency(): string | null {
+  try {
+    return localStorage.getItem(STORAGE_KEY);
+  } catch (error) {
+    console.warn('Failed to read currency from localStorage:', error);
+    return null;
+  }
+}
+
+/**
+ * Save currency preference to localStorage
+ * @param currency - Currency code to cache
+ */
+export function setCachedCurrency(currency: string): void {
+  try {
+    localStorage.setItem(STORAGE_KEY, currency);
+  } catch (error) {
+    console.warn('Failed to save currency to localStorage:', error);
+  }
+}
+
+/**
+ * Get preferred currency with auto-detection fallback
+ * Priority: localStorage > locale detection > default (USD)
+ * @param currentLocale - Current browser/i18n locale
+ * @returns Currency code
+ */
+export function getPreferredCurrency(currentLocale: string): string {
+  // 1. Check localStorage (user has previously selected)
+  const cached = getCachedCurrency();
+  if (cached) {
+    return cached;
+  }
+
+  // 2. Auto-detect from locale
+  const detected = detectCurrencyFromLocale(currentLocale);
+
+  // 3. Cache the detection for future visits
+  setCachedCurrency(detected);
+
+  return detected;
+}
diff --git a/frontend/src/proprietary/utils/protocolDetection.ts b/frontend/src/proprietary/utils/protocolDetection.ts
index 9bd9ce03b..eb5d0a29a 100644
--- a/frontend/src/proprietary/utils/protocolDetection.ts
+++ b/frontend/src/proprietary/utils/protocolDetection.ts
@@ -10,10 +10,10 @@
 export function isSecureContext(): boolean {
   // Allow localhost for development (works with both HTTP and HTTPS)
   if (typeof window !== 'undefined') {
-    // const hostname = window.location.hostname;
     const protocol = window.location.protocol;
 
     // Localhost is considered secure for development
+    // const hostname = window.location.hostname;
     // if (hostname === 'localhost' || hostname === '127.0.0.1' || hostname === '[::1]') {
     //   return true;
     // }