What is 500 internal server error?
A 500 internal server error is an HTTP status code that means the server hit an unexpected problem and could not load the page, for both users and search engine crawlers.
Common causes include broken plugins or themes, server misconfiguration, database errors, exhausted memory, faulty code deployments and problems with .htaccess files.
Unlike a 404, a 500 error means the page may still exist but the server failed to deliver it. Related codes include 502 bad gateway, 503 service unavailable and 504 gateway timeout.
Common causes of 500 errors
| Cause | Typical fix |
|---|---|
| Broken code or plugin conflict | Disable recent plugins or roll back changes |
| Corrupt .htaccess or server config | Restore a working config file |
| PHP memory limit reached | Increase memory limit or fix heavy scripts |
| Database connection problems | Check database credentials and server status |
| File permission errors | Reset permissions to correct values |
| Server overload | Upgrade hosting, add caching or a CDN |
How 500 errors affect SEO
Occasional short errors are not a problem. Frequent or long lasting 5xx errors make Google slow down crawling, and pages that keep failing can be dropped from the index. Errors on key pages also lose visitors and sales immediately.
How to fix and prevent 500 errors
- 1Check server error logs to find the exact cause.
- 2Roll back the latest update, plugin or code change if errors started after it.
- 3Contact your hosting provider if the issue is on the server.
- 4Use uptime monitoring to get alerts as soon as errors start.
- 5Review the Crawl stats report in Search Console for spikes in server errors.
- 6Use a 503 status with Retry-After during planned maintenance instead of letting pages fail.
500 error monitoring checklist
- 1Set up uptime monitoring with alerts.
- 2Review server error logs weekly.
- 3Watch the Crawl stats report in Search Console for server errors.
- 4Test key pages after every plugin, theme or code update.
500 errors during traffic spikes
Sales, launches and viral posts can overload servers and trigger 500 errors exactly when visitors arrive. Load test before big events, use caching and a CDN, and have a plan to scale hosting quickly if traffic jumps.
Why 500 errors hurt SEO
A 500 internal server error means the server failed to complete a request. Visitors see an error instead of the page, and search engines cannot crawl it. Short, rare errors cause little harm, but frequent or lasting 500 errors can slow crawling and, over time, lead Google to drop affected pages from the index.
Common causes include broken code, plugin conflicts, server overload, database problems and misconfigured server rules.
Fixing 500 errors
- 1Check Search Console for server error reports.
- 2Review server and application error logs.
- 3Disable recently added plugins or code changes.
- 4Check server resources such as memory and CPU.
- 5Fix database connection issues.
- 6Test pages after each fix.
- 7Set up uptime monitoring.
Preventing server errors
Staging tests
Test updates on a staging site before going live.
Scalable hosting
Plans that handle traffic spikes.
Monitoring alerts
Instant alerts when errors appear.
500 error checklist
- 1Uptime monitoring active.
- 2Error logs reviewed.
- 3Plugins and code tested on staging.
- 4Server resources sufficient.
- 5503 used for planned maintenance.
500 errors and migrations
Site migrations and platform changes often cause temporary 500 errors. Test the new site under load before launch and monitor errors closely in the first days.
Why 500 internal server error matters for SEO
If Googlebot sees repeated 5xx errors, it slows crawling and may eventually drop affected pages from the index.
Users who hit server errors leave immediately, losing sales and enquiries and damaging trust.
How 500 internal server error works
Dealing with 500 errors follows three steps.
Detect
Watch Search Console crawl stats, server logs and uptime monitoring for 5xx spikes.
Diagnose
Check error logs, recent deployments, plugins and server resources.
Fix and prevent
Roll back faulty changes, fix code, add resources and test before future releases.
An ecommerce site updates a plugin on Friday evening and every product page returns a 500 error. Google crawls hundreds of failing pages over the weekend. Rolling back the plugin and adding uptime alerts prevents a repeat.
500 internal server error checklist
- ✓Set up uptime and error monitoring
- ✓Check server logs when errors appear
- ✓Test updates on staging first
- ✓Use 503 with Retry-After during planned maintenance
- ✓Keep backups ready for quick rollback
- ✓Watch Search Console for 5xx spikes
Common 500 internal server error mistakes
Ignoring short outages
Repeated short errors still affect crawling.
Updating live without testing
Untested changes often cause 500 errors.
Using 500 for maintenance
503 tells search engines the outage is temporary.
No backups
Without backups, recovery takes much longer.
Related SEO terms
500 internal server error FAQs
What causes a 500 error?
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Server problems such as broken code, plugin conflicts, configuration errors or limited resources.
How do I fix a 500 error?
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Check error logs, undo recent changes and fix code or server settings.
How quickly does Google react?
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Google retries, but long lasting errors can lead to deindexing.
Can a 500 error page hurt rankings permanently?
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Short outages rarely do; long or repeated errors can lead Google to drop pages.
Should maintenance pages return 503?
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Yes. A 503 tells search engines the outage is temporary, unlike a 500.
How fast should 500 errors be fixed?
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As quickly as possible. Errors lasting hours or days can reduce crawling and lose visitors.
Do 500 errors affect rankings site wide?
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Widespread errors can slow crawling across the site. Isolated errors on a few pages have limited impact.
Do 500 errors hurt SEO?
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Repeated errors slow crawling and can drop pages from the index.
What is the difference between 500 and 503?
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500 is an unexpected error, while 503 means temporarily unavailable.
How do I monitor server errors?
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Use uptime tools, server logs and Search Console crawl stats.
Should a maintenance page return a 500?
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Use a 503 status for planned maintenance instead.
Do 500 errors affect AI crawlers?
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Yes. Any crawler hitting errors cannot read the page, so content may be missed.
Can a CDN hide 500 errors?
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Some CDNs can serve cached pages during outages, which helps users and crawlers.
How do I find which pages return 500 errors?
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Use Search Console's Pages report, crawler tools and server logs.