diff --git a/apps/portal/src/app/features/certificates/pages/CertificatesPage.tsx b/apps/portal/src/app/features/certificates/pages/CertificatesPage.tsx
index 9e8879996..73e924775 100644
--- a/apps/portal/src/app/features/certificates/pages/CertificatesPage.tsx
+++ b/apps/portal/src/app/features/certificates/pages/CertificatesPage.tsx
@@ -36,6 +36,7 @@ import {
   useGetMyMedicalCertificatesQuery,
 } from '@ema-platform/api';
 import { PdfPreviewModal } from '@ema-platform/ui';
+import { useApplicationPayment } from '../../payments/hooks/useApplicationPayment';
 
 // ---------------------------------------------------------------------------
 // Mock data
@@ -55,6 +56,9 @@ interface CertificatesOverview {
     type: string;
     submitted: string;
     status: string;
+    /** The fee owed at the current status, or null when nothing is due. */
+    feeAmount: number | null;
+    feeCurrency: string | null;
   }[];
 }
 
@@ -141,6 +145,7 @@ export function CertificatesPage() {
   const [previewUrl, setPreviewUrl] = useState<string | null>(null);
   const [previewTitle, setPreviewTitle] = useState('');
   const [loading, setLoading] = useState(false);
+  const { pay, isPaying } = useApplicationPayment();
 
   const { data } = useApiQuery<CertificatesOverview>({
     url: '/certificates/my',
@@ -313,14 +318,28 @@ export function CertificatesPage() {
                     </Badge>
                   </Table.Td>
                   <Table.Td>
-                    <Text
-                      fz="xs"
-                      c="blue"
-                      style={{ cursor: 'pointer' }}
-                      onClick={() => navigate(`/applications/${app.applicationId}`)}
-                    >
-                      Details
-                    </Text>
+                    <Group gap="xs" justify="flex-end" wrap="nowrap">
+                      {/* feeAmount is non-null exactly when the server would
+                          accept a payment, so the button and the API agree. */}
+                      {app.feeAmount !== null && (
+                        <Button
+                          size="xs"
+                          color="yellow"
+                          loading={isPaying}
+                          onClick={() => pay(app.applicationId)}
+                        >
+                          Pay {app.feeAmount.toLocaleString()} {app.feeCurrency}
+                        </Button>
+                      )}
+                      <Text
+                        fz="xs"
+                        c="blue"
+                        style={{ cursor: 'pointer' }}
+                        onClick={() => navigate(`/applications/${app.applicationId}`)}
+                      >
+                        Details
+                      </Text>
+                    </Group>
                   </Table.Td>
                 </Table.Tr>
               ))}
diff --git a/apps/portal/src/app/features/licensing/components/ExamStageActions.tsx b/apps/portal/src/app/features/licensing/components/ExamStageActions.tsx
index 76ceebaa4..b19ec09f4 100644
--- a/apps/portal/src/app/features/licensing/components/ExamStageActions.tsx
+++ b/apps/portal/src/app/features/licensing/components/ExamStageActions.tsx
@@ -93,6 +93,25 @@ export function ExamStageActions({
     );
   }
 
+  // Passed: the certificate itself is the last fee on the application.
+  if (app.status === 'EXAM_PASSED') {
+    return (
+      <Button
+        size="xs"
+        variant="filled"
+        color="yellow"
+        loading={paying}
+        onClick={() => onPay(app)}
+      >
+        {t('applications.actions.payCertificateFee', {
+          defaultValue: 'Pay certificate fee ({{amount}} {{currency}})',
+          amount: Number(app.feeAmount ?? 0).toLocaleString(),
+          currency: app.feeCurrency,
+        })}
+      </Button>
+    );
+  }
+
   // Paid and scheduled are both waiting states — nothing for the candidate to
   // do, so say so rather than offering a button that does nothing.
   if (app.status === 'EXAM_PAID' || app.status === 'EXAM_SCHEDULED') {
diff --git a/apps/portal/src/app/features/licensing/pages/MyApplicationsPage/actions.tsx b/apps/portal/src/app/features/licensing/pages/MyApplicationsPage/actions.tsx
index a2d078363..523a8c6ba 100644
--- a/apps/portal/src/app/features/licensing/pages/MyApplicationsPage/actions.tsx
+++ b/apps/portal/src/app/features/licensing/pages/MyApplicationsPage/actions.tsx
@@ -14,6 +14,7 @@ const EXAM_STAGE_STATUSES = [
   'EXAM_PAID',
   'EXAM_SCHEDULED',
   'EXAM_FAILED',
+  'EXAM_PASSED',
 ];
 
 export function applicationActionsColumn(
diff --git a/libs/api/src/lib/features/licensing/licensing.helpers.ts b/libs/api/src/lib/features/licensing/licensing.helpers.ts
index f4dcc1c57..248de738b 100644
--- a/libs/api/src/lib/features/licensing/licensing.helpers.ts
+++ b/libs/api/src/lib/features/licensing/licensing.helpers.ts
@@ -160,6 +160,8 @@ export const APPLICANT_ACTION_STATUSES: LicenseStatus[] = [
   // sit again after a failure.
   'EXAM_PAYMENT_PENDING',
   'EXAM_FAILED',
+  // Passed: the certificate fee falls due, and only the candidate can pay it.
+  'EXAM_PASSED',
 ];
 
 /** Statuses that are finished, whichever way they went. */