diff --git a/backend/api_core.py b/backend/api_core.py
index f515d27..be3f116 100644
--- a/backend/api_core.py
+++ b/backend/api_core.py
@@ -8108,6 +8108,7 @@ def _handle_routes(db):
         ep = db.execute("SELECT * FROM employer_profiles WHERE user_id = ?", [user_id]).fetchone()
         user_data['worker_profile'] = row_to_dict(wp)
         user_data['employer_profile'] = row_to_dict(ep)
+        user_data['is_new_user'] = is_new_google_user
 
         return json_response(user_data, 200 if existing else 201)
 
diff --git a/backend/test_deep_audit_regressions.py b/backend/test_deep_audit_regressions.py
index 9af1148..aa05f2c 100644
--- a/backend/test_deep_audit_regressions.py
+++ b/backend/test_deep_audit_regressions.py
@@ -71,6 +71,35 @@ def _request_api(self, method, path, payload=None, token=""):
             self.module.handle_request()
         return parse_cgi_output(out.getvalue())
 
+    def test_google_auth_reports_whether_the_account_was_created(self):
+        os.environ["GOOGLE_CLIENT_ID"] = "google-client-under-test"
+        verified_identity = {
+            "aud": "google-client-under-test",
+            "iss": "https://accounts.google.com",
+            "email": "new-google-user@example.com",
+            "email_verified": "true",
+            "name": "New Google User",
+            "sub": "google-sub-under-test",
+        }
+        response = mock.MagicMock()
+        response.__enter__.return_value.read.return_value = json.dumps(verified_identity).encode("utf-8")
+
+        with (
+            mock.patch.object(self.module.urllib.request, "urlopen", return_value=response),
+            mock.patch.object(self.module, "send_welcome_email"),
+        ):
+            created_status, created = self._request_api(
+                "POST", "/auth/google", {"credential": "new-google-credential"}
+            )
+            existing_status, existing = self._request_api(
+                "POST", "/auth/google", {"credential": "returning-google-credential"}
+            )
+
+        self.assertEqual(created_status, 201, created)
+        self.assertIs(created["is_new_user"], True)
+        self.assertEqual(existing_status, 200, existing)
+        self.assertIs(existing["is_new_user"], False)
+
     def test_service_mutations_enforce_checkout_compatible_delivery_days(self):
         token = "tok-service-delivery"
         db = self.module.get_db()
diff --git a/frontend/index.html b/frontend/index.html
index 9f3ddfb..822b01a 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -362,10 +362,16 @@ <h2>Common agent-delegated work</h2>
 function handleGoogleCredential(response) {
   api('/auth/google', { method: 'POST', body: { credential: response.credential } })
     .then(data => {
-      const { token, ...user } = data;
+      const { token, is_new_user: isNewUser, ...user } = data;
       saveSession(token, user);
-      toast('Welcome to GoHireHumans!', 'success');
-      trackRecommendedEvent('login', { method: 'google' });
+      if (isNewUser) {
+        trackEvent('signup_completed', { source: 'google_auth', method: 'google' });
+        trackRecommendedEvent('sign_up', { method: 'google', source: 'google_auth' });
+        toast('Account created! Welcome to GoHireHumans.', 'success');
+      } else {
+        trackRecommendedEvent('login', { method: 'google' });
+        toast('Welcome back!', 'success');
+      }
       navigate('#/');
     })
     .catch(err => toast(err.message || 'Google sign-in failed', 'error'));
diff --git a/frontend/tests/browser-regression.spec.js b/frontend/tests/browser-regression.spec.js
index 0ca898c..03c2ca7 100644
--- a/frontend/tests/browser-regression.spec.js
+++ b/frontend/tests/browser-regression.spec.js
@@ -239,6 +239,50 @@ test.describe('GoHireHumans public/browser regression suite', () => {
     expect(call[2]).not.toHaveProperty('campaign');
   });
 
+  test('Google auth distinguishes completed signup from returning login', async ({ page }) => {
+    await setupDeterministicLocalPage(page);
+    await page.goto('/', { waitUntil: 'domcontentloaded' });
+
+    const eventsFor = async isNewUser => page.evaluate(async newAccount => {
+      const events = [];
+      window.gtag = (...args) => events.push(args);
+      window.api = async path => {
+        if (path !== '/auth/google') throw new Error(`Unexpected API path: ${path}`);
+        return {
+          id: newAccount ? 701 : 702,
+          email: newAccount ? 'new-google@example.test' : 'returning-google@example.test',
+          name: newAccount ? 'New Google User' : 'Returning Google User',
+          token: 'google-auth-test-token',
+          is_new_user: newAccount,
+        };
+      };
+      window.saveSession = () => {};
+      window.toast = () => {};
+      window.navigate = () => {};
+      handleGoogleCredential({ credential: 'google-credential-under-test' });
+      for (let attempt = 0; attempt < 20 && events.length === 0; attempt += 1) {
+        await new Promise(resolve => setTimeout(resolve, 10));
+      }
+      return events
+        .filter(args => args[0] === 'event')
+        .map(args => ({ name: args[1], params: args[2] }));
+    }, isNewUser);
+
+    const newAccountEvents = await eventsFor(true);
+    expect(newAccountEvents.map(event => event.name)).toEqual(['signup_completed', 'sign_up']);
+    expect(newAccountEvents.find(event => event.name === 'signup_completed')?.params).toMatchObject({
+      ui_source: 'google_auth',
+      method: 'google',
+    });
+    expect(newAccountEvents.map(event => event.name)).not.toContain('login');
+
+    const returningEvents = await eventsFor(false);
+    expect(returningEvents.map(event => event.name)).toEqual(['login']);
+    expect(returningEvents[0]?.params).toMatchObject({ method: 'google' });
+    expect(returningEvents.map(event => event.name)).not.toContain('sign_up');
+    expect(returningEvents.map(event => event.name)).not.toContain('signup_completed');
+  });
+
   test('application submission failure stays visible and retryable', async ({ page }) => {
     await setupDeterministicLocalPage(page);
     await page.goto('/', { waitUntil: 'domcontentloaded' });