How to Fix 500 Internal Server Error in WooCommerce (Step-by-Step Guide)
The 500 Internal Server Error is one of the most frustrating issues WooCommerce store owners face.
It usually appears when:
- Customers try to access checkout
- Admin dashboard stops loading
- After installing a plugin
- During traffic spikes
The worst part? The error message doesn’t clearly tell you what’s wrong.
This guide will walk you through step-by-step troubleshooting methods to fix the issue safely.
What Causes 500 Internal Server Error in WooCommerce?
The error usually occurs due to:
• Corrupted .htaccess file
• PHP memory exhaustion
• Plugin conflicts
• Theme issues
• Server misconfiguration
• High CPU usage on shared hosting
WooCommerce stores are resource-heavy because they run dynamic queries (cart, sessions, payments).
Step-by-Step Fixes
✅ 1. Check and Regenerate .htaccess File
- Go to File Manager (or FTP)
- Locate
.htaccess - Rename it to
.htaccess_old - Go to WordPress → Settings → Permalinks
- Click “Save Changes”
This regenerates a fresh .htaccess file.
If the error disappears → problem solved.
✅ 2. Increase PHP Memory Limit
Open wp-config.php and add:
define('WP_MEMORY_LIMIT', '256M');For WooCommerce stores, 128M is often not enough.
If your hosting restricts memory limits, you may need to contact support.
✅ 3. Disable Plugins (Plugin Conflict Test)
- Rename
/wp-content/pluginsfolder temporarily. - Check your site.
If it works → one plugin is causing the issue.
Rename back and disable plugins one by one to find the culprit.
✅ 4. Switch to Default Theme
Sometimes poorly coded themes break WooCommerce.
Switch to a default theme like Twenty Twenty-Four temporarily and test.
✅ 5. Check Server Error Logs
Inside hosting control panel → Error Logs
Look for:
- Fatal PHP errors
- Memory exhausted errors
- Timeout errors
These logs reveal the real cause.
When Hosting Is the Real Problem
If:
• The error appears during traffic spikes
• You see frequent resource limit warnings
• Memory increase doesn’t help
• Error happens randomly
Then the root cause is likely shared hosting resource limitations.
WooCommerce stores require:
✔ Dedicated CPU
✔ Higher PHP memory
✔ Stable database performance
If your site is growing, upgrading to VPS or optimized cloud hosting may permanently fix the issue.
For a breakdown of hosting options for growing stores, see:
👉 (WooCommerce Hosting Upgrade Guide)
Advanced Fix (For Developers)
If you’re comfortable with advanced troubleshooting:
• Enable debug mode:
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);Check /wp-content/debug.log
This will reveal the exact PHP error.
Remember to disable debug after testing.
Technical FAQ
Because of PHP conflicts or server memory exhaustion.
Yes, especially on low-resource hosting during heavy queries.
If caused by CPU/memory limits — yes, upgrading often resolves it permanently.
Yes. Frequent 500 errors can hurt search rankings and user trust.