diff --git a/src/api/http.ts b/src/api/http.ts
index c3df4fb..9206f64 100644
--- a/src/api/http.ts
+++ b/src/api/http.ts
@@ -80,7 +80,11 @@ export async function refreshAuthenticatedSession() {
     })
       .catch((error) => {
         if (error instanceof CrossTabRefreshTimeoutError) {
-          throw new ApiError(error.message, 'A0401', 401)
+          const expiredError = new ApiError(error.message, 'A0401', 401)
+          clearSessionTokens()
+          window.dispatchEvent(new CustomEvent('cc-client-session-expired'))
+          redirectToLoginAfterSessionExpiry()
+          throw expiredError
         }
         throw error
       })
diff --git a/src/modules/auth/views/AuthViews.test.mjs b/src/modules/auth/views/AuthViews.test.mjs
index 9939122..f635cd4 100644
--- a/src/modules/auth/views/AuthViews.test.mjs
+++ b/src/modules/auth/views/AuthViews.test.mjs
@@ -88,7 +88,8 @@ test('uses real auth endpoints and single-flight refresh handling', () => {
   assert.match(httpSource, /envelope\.code !== '200'/)
   assert.match(httpSource, /redirectToLoginAfterSessionExpiry/)
   assert.match(httpSource, /error instanceof CrossTabRefreshTimeoutError/)
-  assert.match(httpSource, /new ApiError\(error\.message, 'A0401', 401\)/)
+  assert.match(httpSource, /const expiredError = new ApiError\(error\.message, 'A0401', 401\)/)
+  assert.match(httpSource, /error instanceof CrossTabRefreshTimeoutError[\s\S]*window\.dispatchEvent\(new CustomEvent\('cc-client-session-expired'\)\)[\s\S]*redirectToLoginAfterSessionExpiry\(\)/)
   assert.match(httpSource, /window\.location\.replace\(`\/login\?redirect=\$\{encodeURIComponent\(redirect\)\}`\)/)
   assert.match(authStoreSource, /decodeMerchantToken/)
   assert.doesNotMatch(authStoreSource, /mock-client:/)