500
5xxSEO: criticalRFC 9110
HTTP 500 Internal Server Error
The server encountered an unexpected condition. Sustained 500s cause deindexing.
Indexable by Google
No
Link equity passed
No
SEO Impact
Critical
Category
5XX
SEO Impact
500 is the most damaging server error for SEO. If Googlebot encounters 500s across your site or on critical pages, Google will reduce crawl frequency and eventually drop affected pages from the index. A brief 500 (server hiccup) is usually forgiven within a few crawl cycles. Sustained 500s appear in Search Console under Server Errors and can cause significant ranking drops. Monitor with uptime alerting and fix immediately.
When to Use 500
Only returned by accident — it signals an unhandled exception, database connection failure, or misconfigured server.
HTTP Response Example
HTTP/1.1 500 Internal Server Error Content-Type: text/html
Test with cURL
$ curl -I https://example.com/
Test this in your browser
Check how HTTP 500 responses affect your actual URLs