Why Does Gmail Keep Asking Me to Sign In?

Almost always a cookie, browser, or security setting — here’s what’s causing it and how to fix it

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Gmail logging you out every time you close the browser, asking you to sign in again after a few hours, or repeatedly prompting for credentials even during an active session is a specific and fixable problem.

The cause is almost always something clearing your session cookies, a browser setting treating sessions as temporary, or Google’s own security systems ending the session.

Here’s how to identify which one applies and stop the repeated sign-ins.

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Your Browser Is Clearing Cookies on Close

This is the most common cause on desktop by a significant margin. Gmail keeps you signed in through a session cookie stored in your browser. When your browser is configured to clear cookies on exit — either through its own settings or through a privacy extension — that cookie gets deleted when you close the browser. The next time you open Gmail, Google has no record of your previous session and asks you to sign in again.

Chrome: Go to Settings → Privacy and Security → Cookies and Other Site Data. Look for Clear Cookies and Site Data When You Close All Windows. If this is enabled, turn it off.

Firefox: Go to Settings → Privacy and Security → History. If Firefox is set to Never Remember History or to use custom settings that clear cookies on close, change the history setting to Remember History or adjust the custom settings to keep cookies between sessions.

Edge: Go to Settings → Privacy, Search and Services → Clear Browsing Data → Choose What to Clear Every Time You Close the Browser. Make sure Cookies and Other Site Data is unchecked.

Safari: Go to Preferences → Privacy and check the cookie handling settings. Confirm cookies aren’t set to clear between sessions.

After changing the setting, sign back into Gmail and close and reopen the browser — you should stay signed in.

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A Privacy Extension Is Clearing Your Session

Browser extensions that manage cookies — Cookie AutoDelete, Privacy Badger in aggressive mode, uBlock Origin with strict settings, or any dedicated cookie cleaning tool — automatically delete cookies either on a schedule, when you close the browser, or when they detect tracking cookies. Gmail’s session cookies look like tracking cookies to some of these tools and get cleared along with everything else.

Test by opening Gmail in incognito or private mode where most extensions are disabled. If you stay signed in during that session in a way you normally don’t, an extension is clearing your cookies in regular browsing.

Go to your browser’s extensions page, look for any cookie management or privacy tools, and add google.com and gmail.com to their whitelist or exception list. This tells the extension to preserve Gmail’s session cookies while still cleaning up other sites.

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You Didn’t Stay Signed In

Google’s sign-in page has a subtle difference between a temporary session and a persistent one. If you sign in without checking any “stay signed in” option, Google may treat it as a temporary session that expires after a period of inactivity or when the browser closes.

On the Google sign-in page, after entering your email and password, look for any option related to staying signed in. On some Google account configurations, particularly for personal accounts, this option appears during the sign-in flow. Make sure it’s selected before completing sign-in.

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Google’s Security System Is Ending Your Session

Google automatically ends sessions when its security systems detect unusual activity — a login from an unfamiliar device, an IP address that changed significantly, a VPN that makes your location appear to jump between countries, or multiple simultaneous active sessions from different locations.

Check your Google account’s recent activity. Go to myaccount.google.com/security and look at Recent Security Activity. Also scroll to the bottom of any Gmail page and click Details next to Last Account Activity — this shows every active session and recent sign-ins.

If any sessions look unfamiliar — wrong devices, unexpected locations — your account may have been compromised. Sign out of all sessions, change your password, and enable two-factor authentication.

If all sessions look legitimate but Google keeps ending them, a VPN or frequently changing IP address is likely triggering the security system. Try using Gmail without the VPN and see whether the repeated sign-ins stop.

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Third-Party Cookies Are Blocked

Gmail’s sign-in process and session management rely on cookies including what browsers classify as third-party cookies. If your browser is set to block all third-party cookies, Gmail’s authentication system may not work correctly — the session token can’t be properly stored or validated.

Chrome: Go to Settings → Privacy and Security → Cookies and Other Site Data. Make sure the setting isn’t on Block All Cookies or Block Third-Party Cookies in Incognito extending to regular browsing. The recommended setting is Block Third-Party Cookies in Incognito rather than blocking them everywhere.

Firefox: Go to Settings → Privacy and Security → Enhanced Tracking Protection. If set to Strict, it may block cookies that Gmail needs. Try Standard mode if you’re experiencing repeated sign-ins.

If you specifically want to keep strict cookie blocking elsewhere, add google.com as an exception that’s allowed to set cookies.

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Multiple Google Accounts Creating Conflicts

If you use multiple Google accounts in the same browser, switching between them or having sessions expire on one account can produce repeated sign-in prompts that feel like a single account issue.

Check how many Google accounts are active in your browser by clicking your profile picture in Gmail. If multiple accounts are signed in, session management becomes more complex — each account maintains its own session and any one of them expiring prompts a sign-in.

Using separate browser profiles for each Google account keeps sessions isolated and more stable. Chrome’s profile feature creates completely independent cookie stores for each profile.

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The Gmail App Is Requiring Sign-In on Mobile

On mobile, repeated Gmail sign-in requests have different causes than on desktop.

Android battery optimization can kill Gmail’s background processes including the ones that maintain your authenticated session. Go to Settings → Apps → Gmail → Battery and set it to Unrestricted or Not Optimized.

Low device storage prevents apps from properly saving session data. If your device storage is nearly full, Gmail may fail to persist its login state between sessions. Free up storage and test whether the sign-in prompts continue.

Outdated Gmail app. An outdated app version can have authentication bugs. Check the Play Store or App Store for Gmail updates and install them.

Clear the Gmail app cache on Android: go to Settings → Apps → Gmail → Storage → Clear Cache. This removes corrupted temporary data without deleting your account configuration.

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Google Workspace Account Policy

For Google Workspace accounts — work or school Google accounts managed by an organization — the administrator may have configured session length policies that force re-authentication after a set period. These policies override any user-level settings.

Common Workspace session policies include requiring sign-in every 24 hours, every 8 hours, or at the start of each browser session. If your work account keeps asking you to sign in on a regular schedule, this is almost certainly an administrator-configured policy rather than a technical problem.

Contact your Google Workspace administrator if you want to understand or change the session duration policy for your organization.

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Two-Factor Authentication Re-Prompting

If Google keeps asking for your second factor — a verification code, a prompt on your phone, or a security key — rather than just your password, 2FA verification is expiring or not being remembered.

When completing 2FA, look for an option like Don’t Ask Again on This Device or Trust This Device for 30 Days. Making sure this is selected prevents Google from re-prompting for your second factor on every sign-in from the same device.

Also check myaccount.google.com/security → 2-Step Verification → Devices You Trust and confirm your current device is listed. If it’s not listed or was recently removed, adding it as a trusted device reduces re-prompting.

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Clear Google’s Cookies Specifically and Sign In Fresh

If the sign-in loop persists and nothing above has resolved it, clearing Gmail and Google’s cookies specifically and starting a fresh session often breaks the cycle regardless of the underlying cause.

In your browser, click the padlock icon next to gmail.com in the address bar. Select Cookies or Site Information and remove all cookies stored for Google and Gmail. Sign back in to Gmail — Google will re-establish a fresh session that often remains stable after this reset.

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A Quick Checklist

Work through these in order:

• Check browser cookie settings — turn off clear cookies on close
• Test in incognito mode — if you stay signed in, a privacy extension is the cause
• Add google.com and gmail.com to exceptions in any cookie management extensions
• Check third-party cookie settings — don’t block all cookies
• Disable VPN temporarily and test whether sign-in prompts stop
• Check recent Google account activity at myaccount.google.com/security
• Select Don’t Ask Again on This Device during 2FA verification
• Check battery optimization on Android — set Gmail to Unrestricted
• Clear Gmail app cache on mobile
• Update Gmail app to the latest version
• Contact your Google Workspace administrator if on a work account with session policies
• Clear Google’s cookies specifically and sign in fresh as a last resort

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The Bottom Line

Gmail repeatedly asking you to sign in is almost always caused by browser cookies being cleared on close, a privacy extension deleting Gmail’s session cookies, or Google’s security system ending the session because of a VPN or changing IP address. The browser cookie settings check and the extension audit together resolve the majority of desktop cases within a few minutes.

For Workspace accounts on a predictable schedule — being asked to sign in every morning, every 8 hours, or at similar intervals — administrator session policies are almost certainly the cause rather than any technical issue on your end.

Gmail isn’t forgetting you — something is deleting the cookie it uses to remember you, or Google decided the session looked suspicious. Find which one and the repeated sign-ins stop.