Binance Crypto Exchange Error Code -1021: How to Fix It

Easy 5-10 minutes Medium Severity Verified June 2026
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Error Code
-1021
Brand
Binance
Product Type
crypto_exchange
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-10 minutes
Binance Error Code -1021 (INVALID_TIMESTAMP) occurs when your computer's system clock is out of sync with Binance's servers. This timestamp mismatch prevents API requests from being processed, blocking trading activities until the clock synchronization issue is resolved.
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Tools You'll Need

How to Fix Error Code -1021

  1. Check Your System Time

  2. Enable Automatic Time Sync on Windows

  3. Enable Automatic Time Sync on Mac

  4. Manually Sync with NTP Server

    Running commands as administrator can affect system settings. Only use trusted NTP servers.

  5. Clear Browser Cache and Cookies

    This will log you out of Binance and other websites. Have your login credentials ready.

  6. Restart Your Trading Application

  7. Test Your Connection

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When to Call a Professional

Contact a computer technician if your system clock repeatedly loses sync despite following these steps, as this may indicate hardware issues with your computer's CMOS battery or motherboard. Contact Binance support if the error persists after successful time synchronization.

Frequently Asked Questions

What causes Binance error code -1021?
Error -1021 is caused by your computer's system clock being out of sync with Binance's servers by more than 3 seconds. This timestamp mismatch prevents API requests from being processed for security reasons.
How often should I sync my computer's time?
Most modern systems automatically sync time daily. However, if you frequently encounter timestamp errors, manually sync weekly or enable more frequent automatic updates through your system settings.
Can VPN cause Binance timestamp errors?
Yes, some VPN servers may have incorrect time settings or high latency that can contribute to timestamp issues. Try disconnecting your VPN temporarily to see if the error resolves.
Will this error affect my trading account balance?
No, error -1021 is purely a connection issue and does not affect your account balance or existing positions. It only prevents new API requests until the timestamp sync is fixed.
Why does this error happen more on mobile devices?
Mobile devices may have less reliable automatic time sync, especially when switching between WiFi and cellular networks or traveling across time zones. Ensure your mobile device's automatic time setting is enabled.

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