diff --git a/src/routes/(main)/home/_layout/Header/components/InboxButton.tsx b/src/routes/(main)/home/_layout/Header/components/InboxButton.tsx
index 5bd68d0bdc..43432e4662 100644
--- a/src/routes/(main)/home/_layout/Header/components/InboxButton.tsx
+++ b/src/routes/(main)/home/_layout/Header/components/InboxButton.tsx
@@ -7,23 +7,14 @@ import { memo, useCallback, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 
 import { DESKTOP_HEADER_ICON_SMALL_SIZE } from '@/const/layoutTokens';
-import { useClientDataSWR } from '@/libs/swr';
-import { notificationService } from '@/services/notification';
-import { serverConfigSelectors, useServerConfigStore } from '@/store/serverConfig';
 
 import InboxDrawer from './InboxDrawer';
-import { UNREAD_COUNT_KEY } from './InboxDrawer/constants';
+import { useInboxUnreadCount } from './useInboxUnreadCount';
 
 const InboxButton = memo(() => {
   const { t } = useTranslation('notification');
   const [open, setOpen] = useState(false);
-  const enableBusinessFeatures = useServerConfigStore(serverConfigSelectors.enableBusinessFeatures);
-
-  const { data: unreadCount = 0 } = useClientDataSWR<number>(
-    enableBusinessFeatures ? UNREAD_COUNT_KEY : null,
-    () => notificationService.getUnreadCount(),
-    { refreshInterval: 10_000 },
-  );
+  const { enabled, unreadCount } = useInboxUnreadCount();
 
   const handleToggle = useCallback(() => {
     setOpen((prev) => !prev);
@@ -33,7 +24,7 @@ const InboxButton = memo(() => {
     setOpen(false);
   }, []);
 
-  if (!enableBusinessFeatures) return null;
+  if (!enabled) return null;
 
   return (
     <>
diff --git a/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.test.ts b/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.test.ts
new file mode 100644
index 0000000000..dafb08b0db
--- /dev/null
+++ b/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.test.ts
@@ -0,0 +1,77 @@
+import { renderHook } from '@testing-library/react';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { UNREAD_COUNT_KEY } from './InboxDrawer/constants';
+import { INBOX_UNREAD_COUNT_REFRESH_INTERVAL, useInboxUnreadCount } from './useInboxUnreadCount';
+
+const mocks = vi.hoisted(() => ({
+  state: {
+    enableBusinessFeatures: true,
+    isSignedIn: false,
+  },
+  useClientDataSWR: vi.fn(() => ({ data: undefined })),
+}));
+
+vi.mock('@/libs/swr', () => ({
+  useClientDataSWR: mocks.useClientDataSWR,
+}));
+
+vi.mock('@/services/notification', () => ({
+  notificationService: {
+    getUnreadCount: vi.fn(),
+  },
+}));
+
+vi.mock('@/store/serverConfig', () => ({
+  serverConfigSelectors: {
+    enableBusinessFeatures: (state: { serverConfig: { enableBusinessFeatures: boolean } }) =>
+      state.serverConfig.enableBusinessFeatures,
+  },
+  useServerConfigStore: (
+    selector: (state: { serverConfig: { enableBusinessFeatures: boolean } }) => boolean,
+  ) => selector({ serverConfig: { enableBusinessFeatures: mocks.state.enableBusinessFeatures } }),
+}));
+
+vi.mock('@/store/user', () => ({
+  useUserStore: (selector: (state: { isSignedIn: boolean }) => boolean) =>
+    selector({ isSignedIn: mocks.state.isSignedIn }),
+}));
+
+vi.mock('@/store/user/selectors', () => ({
+  authSelectors: {
+    isLogin: (state: { isSignedIn: boolean }) => state.isSignedIn,
+  },
+}));
+
+beforeEach(() => {
+  mocks.state.enableBusinessFeatures = true;
+  mocks.state.isSignedIn = false;
+  mocks.useClientDataSWR.mockClear();
+  mocks.useClientDataSWR.mockReturnValue({ data: undefined });
+});
+
+describe('useInboxUnreadCount', () => {
+  it('does not request unread count before login', () => {
+    const { result } = renderHook(() => useInboxUnreadCount());
+
+    expect(result.current.enabled).toBe(false);
+    expect(mocks.useClientDataSWR).toHaveBeenCalledWith(null, expect.any(Function), {
+      refreshInterval: INBOX_UNREAD_COUNT_REFRESH_INTERVAL,
+    });
+  });
+
+  it('requests unread count when business features are enabled and user is logged in', () => {
+    mocks.state.isSignedIn = true;
+
+    const { result } = renderHook(() => useInboxUnreadCount());
+
+    expect(result.current.enabled).toBe(true);
+    expect(mocks.useClientDataSWR).toHaveBeenCalledWith(UNREAD_COUNT_KEY, expect.any(Function), {
+      refreshInterval: INBOX_UNREAD_COUNT_REFRESH_INTERVAL,
+    });
+  });
+
+  it('keeps unread count polling on the same 10 second cadence', () => {
+    expect(INBOX_UNREAD_COUNT_REFRESH_INTERVAL).toBe(10_000);
+  });
+});
diff --git a/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.ts b/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.ts
new file mode 100644
index 0000000000..1a1747cea1
--- /dev/null
+++ b/src/routes/(main)/home/_layout/Header/components/useInboxUnreadCount.ts
@@ -0,0 +1,23 @@
+import { useClientDataSWR } from '@/libs/swr';
+import { notificationService } from '@/services/notification';
+import { serverConfigSelectors, useServerConfigStore } from '@/store/serverConfig';
+import { useUserStore } from '@/store/user';
+import { authSelectors } from '@/store/user/selectors';
+
+import { UNREAD_COUNT_KEY } from './InboxDrawer/constants';
+
+export const INBOX_UNREAD_COUNT_REFRESH_INTERVAL = 10_000;
+
+export const useInboxUnreadCount = () => {
+  const enableBusinessFeatures = useServerConfigStore(serverConfigSelectors.enableBusinessFeatures);
+  const isLogin = useUserStore(authSelectors.isLogin);
+  const enabled = enableBusinessFeatures && isLogin === true;
+
+  const { data: unreadCount = 0 } = useClientDataSWR<number>(
+    enabled ? UNREAD_COUNT_KEY : null,
+    () => notificationService.getUnreadCount(),
+    { refreshInterval: INBOX_UNREAD_COUNT_REFRESH_INTERVAL },
+  );
+
+  return { enabled, unreadCount };
+};