diff --git a/docs/release-control/v6/internal/subsystems/cloud-paid.md b/docs/release-control/v6/internal/subsystems/cloud-paid.md
index df2639288..c1ed61b95 100644
--- a/docs/release-control/v6/internal/subsystems/cloud-paid.md
+++ b/docs/release-control/v6/internal/subsystems/cloud-paid.md
@@ -243,6 +243,11 @@ success-notification, and canonical denial handling through
 `frontend-modern/src/utils/trialStartAction.ts` instead of carrying local
 `startProTrial()` redirect/error branches that drift from backend commercial
 truth.
+That same rule also covers the self-hosted pricing page in
+`frontend-modern/src/pages/PricingV6.tsx`: pricing CTA state may choose when to
+switch from trial to upgrade presentation, but the actual hosted handoff and
+backend denial classification must still flow through the shared trial-start
+owner instead of parsing raw trial-start status codes inline.
 The hosted trial handoff page is part of that same boundary as well. It may
 still use a secure hosted Stripe-backed session internally, but the customer
 copy must present the flow as starting a trial for the originating Pulse
diff --git a/frontend-modern/src/pages/PricingV6.tsx b/frontend-modern/src/pages/PricingV6.tsx
index 78bc85149..d09a0767f 100644
--- a/frontend-modern/src/pages/PricingV6.tsx
+++ b/frontend-modern/src/pages/PricingV6.tsx
@@ -14,11 +14,10 @@ import {
   entitlements,
   getUpgradeActionUrlOrFallback,
   loadLicenseStatus,
-  startProTrial,
 } from '@/stores/license';
 import { showToast } from '@/utils/toast';
 import { logger } from '@/utils/logger';
-import { getTrialStartErrorMessage } from '@/utils/upgradePresentation';
+import { getTrialStartErrorKind } from '@/utils/upgradePresentation';
 import {
   SELF_HOSTED_FEATURE_ROWS,
   SELF_HOSTED_PLAN_BY_TIER,
@@ -26,6 +25,7 @@ import {
   type SelfHostedPlanDefinition,
   type SelfHostedTierKey,
 } from '@/utils/selfHostedPlans';
+import { runStartProTrialAction } from '@/utils/trialStartAction';
 
 // ---------------------------------------------------------------------------
 // Shared sub-components
@@ -181,22 +181,20 @@ export default function PricingV6() {
     setStartingTrial(true);
 
     try {
-      const result = await startProTrial();
-      if (result.outcome === 'redirect') {
-        if (typeof window !== 'undefined') {
-          window.location.href = result.actionUrl;
-        }
-        return;
+      const outcome = await runStartProTrialAction({
+        successMessage: 'Pro trial started (14 days).',
+        showSuccess: (message) => showToast('success', message),
+        showError: setTrialMessage,
+        onError: (error) => {
+          if (getTrialStartErrorKind(error) === 'already_used') {
+            setTrialCtaMode('upgrade');
+          }
+          logger.warn('[PricingV6] Trial start request failed', error);
+        },
+      });
+      if (outcome === 'activated') {
+        await loadLicenseStatus(true);
       }
-      showToast('success', 'Pro trial started (14 days).');
-      await loadLicenseStatus(true);
-    } catch (error) {
-      const trialError = error as { code?: string } | null;
-      if (trialError?.code === 'trial_already_used') {
-        setTrialCtaMode('upgrade');
-      }
-      logger.warn('[PricingV6] Trial start request failed', error);
-      setTrialMessage(getTrialStartErrorMessage(error));
     } finally {
       setStartingTrial(false);
     }
diff --git a/frontend-modern/src/pages/__tests__/PricingV6.test.tsx b/frontend-modern/src/pages/__tests__/PricingV6.test.tsx
index 2ef5e8c87..48642730c 100644
--- a/frontend-modern/src/pages/__tests__/PricingV6.test.tsx
+++ b/frontend-modern/src/pages/__tests__/PricingV6.test.tsx
@@ -1,10 +1,19 @@
-import { describe, expect, it, vi } from 'vitest';
-import { render, screen } from '@solidjs/testing-library';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { fireEvent, render, screen, waitFor } from '@solidjs/testing-library';
 import type { JSX } from 'solid-js';
 
 import PricingV6 from '../PricingV6';
 import pricingV6Source from '../PricingV6.tsx?raw';
 
+const entitlementsState = {
+  subscription_state: 'expired',
+  tier: 'free',
+  trial_eligible: false,
+};
+const startProTrialMock = vi.fn();
+const loadLicenseStatusMock = vi.fn().mockResolvedValue(undefined);
+const showToastMock = vi.fn();
+
 vi.mock('@/components/shared/Card', () => ({
   Card: (props: { children?: JSX.Element }) => <div>{props.children}</div>,
 }));
@@ -28,14 +37,10 @@ vi.mock('@/components/shared/PageHeader', () => ({
 }));
 
 vi.mock('@/stores/license', () => ({
-  entitlements: () => ({
-    subscription_state: 'expired',
-    tier: 'free',
-    trial_eligible: false,
-  }),
+  entitlements: () => entitlementsState,
   getUpgradeActionUrlOrFallback: (tier: string) => `/${tier}`,
-  loadLicenseStatus: vi.fn().mockResolvedValue(undefined),
-  startProTrial: vi.fn(),
+  loadLicenseStatus: (...args: unknown[]) => loadLicenseStatusMock(...args),
+  startProTrial: (...args: unknown[]) => startProTrialMock(...args),
 }));
 
 vi.mock('@/utils/upgradeMetrics', () => ({
@@ -43,7 +48,7 @@ vi.mock('@/utils/upgradeMetrics', () => ({
 }));
 
 vi.mock('@/utils/toast', () => ({
-  showToast: vi.fn(),
+  showToast: (...args: unknown[]) => showToastMock(...args),
 }));
 
 vi.mock('@/utils/logger', () => ({
@@ -54,6 +59,16 @@ vi.mock('@/utils/logger', () => ({
 }));
 
 describe('PricingV6', () => {
+  beforeEach(() => {
+    entitlementsState.subscription_state = 'expired';
+    entitlementsState.tier = 'free';
+    entitlementsState.trial_eligible = false;
+    startProTrialMock.mockReset();
+    loadLicenseStatusMock.mockReset();
+    loadLicenseStatusMock.mockResolvedValue(undefined);
+    showToastMock.mockReset();
+  });
+
   it('renders self-hosted plan tiers from the shared pricing model', () => {
     render(() => <PricingV6 />);
 
@@ -74,8 +89,32 @@ describe('PricingV6', () => {
   it('imports the shared self-hosted pricing model instead of redefining it locally', () => {
     expect(pricingV6Source).toContain("@/utils/selfHostedPlans");
     expect(pricingV6Source).toContain("@/utils/upgradePresentation");
+    expect(pricingV6Source).toContain("@/utils/trialStartAction");
     expect(pricingV6Source).not.toContain('const TIERS =');
     expect(pricingV6Source).not.toContain('const FEATURE_ROWS');
     expect(pricingV6Source).not.toContain("setTrialMessage('Trial already used.')");
+    expect(pricingV6Source).not.toContain('startProTrial()');
+  });
+
+  it('switches Pro pricing CTA to upgrade when trial is already used', async () => {
+    entitlementsState.trial_eligible = true;
+    startProTrialMock.mockRejectedValue({
+      status: 409,
+      code: 'trial_already_used',
+      message: 'Trial already used',
+    });
+
+    render(() => <PricingV6 />);
+
+    fireEvent.click(screen.getAllByRole('button', { name: 'Start Free 14-day Trial' })[0]);
+
+    await waitFor(() => {
+      expect(screen.getByText('Trial already used')).toBeInTheDocument();
+    });
+
+    expect(screen.getByRole('link', { name: 'Upgrade to Pro' })).toHaveAttribute(
+      'href',
+      '/upgrade',
+    );
   });
 });
diff --git a/frontend-modern/src/utils/__tests__/trialStartAction.test.ts b/frontend-modern/src/utils/__tests__/trialStartAction.test.ts
index a8dad05e1..63ab8069c 100644
--- a/frontend-modern/src/utils/__tests__/trialStartAction.test.ts
+++ b/frontend-modern/src/utils/__tests__/trialStartAction.test.ts
@@ -76,4 +76,26 @@ describe('runStartProTrialAction', () => {
     expect(showSuccess).not.toHaveBeenCalled();
     expect(navigate).not.toHaveBeenCalled();
   });
+
+  it('invokes the optional error hook with the raw backend error payload', async () => {
+    const onError = vi.fn();
+    const error = {
+      status: 409,
+      code: 'trial_already_used',
+      message: 'Trial already used',
+    };
+    startProTrialMock.mockRejectedValue(error);
+
+    await expect(
+      runStartProTrialAction({
+        showSuccess,
+        showError,
+        navigate,
+        onError,
+      }),
+    ).resolves.toBe('error');
+
+    expect(onError).toHaveBeenCalledWith(error);
+    expect(showError).toHaveBeenCalledWith('Trial already used');
+  });
 });
diff --git a/frontend-modern/src/utils/__tests__/upgradePresentation.test.ts b/frontend-modern/src/utils/__tests__/upgradePresentation.test.ts
index 085aa03fc..5b9104da6 100644
--- a/frontend-modern/src/utils/__tests__/upgradePresentation.test.ts
+++ b/frontend-modern/src/utils/__tests__/upgradePresentation.test.ts
@@ -1,8 +1,10 @@
 import { describe, expect, it } from 'vitest';
 import {
+  getTrialStartErrorKind,
   getProTrialStartedMessage,
   getTrialAlreadyUsedMessage,
   getTrialStartErrorMessage,
+  normalizeTrialStartError,
   getTrialTryAgainLaterMessage,
   getUpgradeActionButtonClass,
   UPGRADE_ACTION_LABEL,
@@ -28,6 +30,14 @@ describe('upgradePresentation', () => {
     expect(getTrialStartErrorMessage('temporary failure')).toBe('temporary failure');
     expect(getTrialStartErrorMessage({ code: 'trial_already_used' })).toBe('Trial already used');
     expect(getTrialStartErrorMessage({ status: 429 })).toBe('Try again later');
+    expect(getTrialStartErrorKind({ code: 'trial_already_used' })).toBe('already_used');
+    expect(getTrialStartErrorKind({ status: 429 })).toBe('retry_later');
+    expect(getTrialStartErrorKind({ message: 'temporary failure' })).toBe('other');
+    expect(normalizeTrialStartError({ status: 409, code: 'trial_not_available' })).toEqual({
+      status: 409,
+      code: 'trial_not_available',
+      message: undefined,
+    });
     expect(
       getTrialStartErrorMessage({
         code: 'trial_not_available',
diff --git a/frontend-modern/src/utils/trialStartAction.ts b/frontend-modern/src/utils/trialStartAction.ts
index 1af7ce051..3a3f4eeef 100644
--- a/frontend-modern/src/utils/trialStartAction.ts
+++ b/frontend-modern/src/utils/trialStartAction.ts
@@ -5,6 +5,7 @@ export type StartProTrialActionOutcome = 'activated' | 'redirect' | 'error';
 
 export interface RunStartProTrialActionOptions {
   branded?: boolean;
+  onError?: (error: unknown) => void;
   successMessage?: string;
   showSuccess: (message: string) => void;
   showError: (message: string) => void;
@@ -32,6 +33,7 @@ export async function runStartProTrialAction(
     showSuccess(successMessage ?? getProTrialStartedMessage());
     return 'activated';
   } catch (error) {
+    options.onError?.(error);
     showError(getTrialStartErrorMessage(error, { branded }));
     return 'error';
   }
diff --git a/frontend-modern/src/utils/upgradePresentation.ts b/frontend-modern/src/utils/upgradePresentation.ts
index b7cb2db61..dc3493651 100644
--- a/frontend-modern/src/utils/upgradePresentation.ts
+++ b/frontend-modern/src/utils/upgradePresentation.ts
@@ -20,6 +20,8 @@ export interface TrialStartErrorLike {
   message?: string;
 }
 
+export type TrialStartErrorKind = 'already_used' | 'retry_later' | 'other';
+
 export function getProTrialStartedMessage(): string {
   return 'Pro trial started';
 }
@@ -32,7 +34,7 @@ export function getTrialTryAgainLaterMessage(): string {
   return 'Try again later';
 }
 
-function normalizeTrialStartError(error?: unknown): TrialStartErrorLike | null {
+export function normalizeTrialStartError(error?: unknown): TrialStartErrorLike | null {
   if (!error) return null;
   if (typeof error === 'string') return { message: error };
   if (typeof error !== 'object') return null;
@@ -45,15 +47,27 @@ function normalizeTrialStartError(error?: unknown): TrialStartErrorLike | null {
   };
 }
 
+export function getTrialStartErrorKind(error?: unknown): TrialStartErrorKind {
+  const normalized = normalizeTrialStartError(error);
+  if (normalized?.code === 'trial_already_used') {
+    return 'already_used';
+  }
+  if (normalized?.status === 429) {
+    return 'retry_later';
+  }
+  return 'other';
+}
+
 export function getTrialStartErrorMessage(
   error?: unknown,
   options: TrialStartErrorOptions = {},
 ): string {
   const normalized = normalizeTrialStartError(error);
-  if (normalized?.code === 'trial_already_used') {
+  const kind = getTrialStartErrorKind(normalized);
+  if (kind === 'already_used') {
     return getTrialAlreadyUsedMessage();
   }
-  if (normalized?.status === 429) {
+  if (kind === 'retry_later') {
     return getTrialTryAgainLaterMessage();
   }
   if (normalized?.message?.trim()) {