How to Fix WordPress 500 Internal Server Error (2026 Guide)
The WordPress 500 Internal Server Error is a generic server-side error that means something went wrong on your server, but the server cannot tell you specifically what. The most common causes are a corrupted .htaccess file, a plugin or theme conflict, PHP memory exhaustion, incorrect file permissions, or a corrupted WordPress core installation. In most cases, you can fix it in under 30 minutes by working through the steps below.
The 500 error is frustrating because it gives you almost no diagnostic information. Unlike more specific WordPress errors that tell you exactly what went wrong, the 500 error simply says “something broke on the server.” This guide works through the causes systematically — from the most common and easiest to fix to the rarest and most complex.
What Causes the 500 Internal Server Error in WordPress?
The 500 error can be triggered by many different server-side problems. The most common causes in WordPress are a corrupted or misconfigured .htaccess file, a PHP fatal error caused by a plugin or theme, PHP memory limit exhaustion, incorrect file or folder permissions, a corrupted WordPress core installation, a PHP version incompatibility, and server-side configuration issues on your hosting provider’s end.
Step 1: Check the .htaccess File
A corrupted .htaccess file is the single most common cause of the 500 error in WordPress — and it is the easiest to fix. The .htaccess file controls URL rewriting, redirects, and various server-level directives. A failed plugin installation, a broken redirect rule, or an incomplete WordPress update can corrupt this file.
Connect to your site via FTP or your hosting file manager. Navigate to your WordPress root directory and find the file named .htaccess. Note that it is a hidden file — you may need to enable “Show hidden files” in your FTP client or file manager settings.
Rename .htaccess to .htaccess-backup. Reload your site. If the 500 error is gone, the .htaccess file was the problem. Log in to your WordPress admin and go to Settings → Permalinks. Click “Save Changes” without changing anything — this tells WordPress to regenerate a fresh, clean .htaccess file.
If you had custom rules in your .htaccess file (redirects, security rules, caching directives), you will need to re-add them to the new file. Add them one section at a time, testing after each addition, to identify any rule that causes the 500 error.
Step 2: Deactivate All Plugins
If the .htaccess fix did not resolve the issue, a plugin is likely causing a PHP fatal error. The fastest way to confirm is to deactivate all plugins at once.
If you can access your WordPress admin, go to Plugins → Installed Plugins, select all, and choose “Deactivate” from Bulk Actions. Reload your site.
If you cannot access the admin, connect via FTP and rename the /wp-content/plugins/ folder to /wp-content/plugins-disabled/. Reload your site. If the error is gone, rename the folder back to plugins. All plugins will now be deactivated. Log in to your admin and reactivate plugins one by one, testing your site after each, until the 500 error returns. The last activated plugin is the culprit.
Once identified, you can update the plugin (if an update is available), replace it with an alternative, or contact the plugin developer to report the issue. See our plugin conflict troubleshooting guide for more detail.
Step 3: Switch to a Default Theme
If deactivating plugins does not fix the error, your theme may be the cause. Via FTP, rename your active theme folder in /wp-content/themes/ — for example, rename my-theme to my-theme-disabled. WordPress will fall back to the latest installed default theme (Twenty Twenty-Four, etc.). Reload your site.
If the 500 error resolves with a default theme, the issue is in your theme’s code. Check if a theme update is available. If you recently edited the theme’s functions.php or other files, those edits may contain a PHP syntax error. Restore the original theme files from a backup or from the theme developer’s download.
Step 4: Increase PHP Memory Limit
If your WordPress site is consuming more PHP memory than your server allows, it can trigger a 500 error. This is especially common on shared hosting with tight memory limits.
Open your wp-config.php file and add:
define('WP_MEMORY_LIMIT', '256M');
You can also try adding to your .htaccess file (if you regenerated it in Step 1):
php_value memory_limit 256M
If the memory limit increase resolves the error, it means your site’s plugins and/or theme are consuming significant memory. Consider auditing your plugin stack to identify memory-heavy plugins, or upgrading your hosting plan for more resources. Read our complete guide on fixing the WordPress memory exhausted error.
Step 5: Check File Permissions
Incorrect file permissions can prevent WordPress from accessing its own files, triggering a 500 error. The correct permissions for WordPress are directories at 755 and files at 644. The wp-config.php file should be 600 or 640 for added security.
Via FTP, check the permissions on your WordPress root directory, the wp-admin folder, wp-content folder, and wp-includes folder. If any are set to 777 (which some users mistakenly set while troubleshooting other issues), change them to 755. If files are set to something other than 644, change them back.
For a comprehensive guide, read our WordPress file permissions article.
Step 6: Enable Debug Mode and Check Error Logs
If the above steps have not identified the cause, enable WordPress debug mode to see the actual PHP error behind the 500 message.
Open wp-config.php and set:
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
Reload the page that triggers the 500 error. Then check /wp-content/debug.log for the specific error message. The log will tell you exactly which file and line number caused the fatal error — giving you a direct path to the fix.
Also check your server’s error log. In cPanel, this is usually at Error Log in the Metrics section. In other hosting panels, check the server logs or access logs section. The server error log often contains information the WordPress debug log does not. Read our guide on WordPress debug mode for full instructions.
Step 7: Reinstall WordPress Core
If a WordPress core update failed partway through, core files may be corrupted or incomplete. Download a fresh copy of WordPress from wordpress.org. Extract it. Upload the wp-admin and wp-includes folders to your server via FTP, overwriting the existing ones. Do not overwrite wp-content or wp-config.php.
Step 8: Contact Your Hosting Provider
If you have tried all of the above and the 500 error persists, the issue is likely at the server infrastructure level — something your hosting provider needs to investigate. Common server-level causes include a PHP upgrade that broke compatibility, ModSecurity rules blocking WordPress requests (this is common and can be verified in server error logs), server resource limits being exceeded, and Apache or Nginx misconfiguration.
Contact your host’s support team with the details of what you have already tried. They can check server error logs and ModSecurity logs that are not accessible from your hosting control panel.
How to Prevent the 500 Error
Maintain daily backups. A daily backup means you can restore within minutes instead of spending hours troubleshooting.
Update plugins carefully. Apply updates one at a time, not all at once. Test after each update. Our update service handles this daily with visual validation.
Monitor your site 24/7. Our maintenance service checks your site every 60 seconds. If a 500 error appears, our team responds immediately.
Use quality hosting. Shared hosting with tight resource limits is the most common environment for 500 errors. If your site is business-critical, consider managed WordPress hosting with more headroom.
Frequently Asked Questions
Is the 500 error caused by my code or by the server?
It can be either. The 500 error is a server-side error, but it is most often triggered by your WordPress code — a plugin, a theme, or a configuration issue. The troubleshooting steps above work from the code level first (Steps 1–5) and move to server-level investigation (Steps 6–8) only if the code-level fixes do not work.
The 500 error only appears on specific pages. Why?
If the error only affects certain pages, it is likely caused by content on those specific pages — a shortcode that calls a deactivated plugin, a page template with a PHP error, or a post containing a code snippet that triggers a fatal error. Try editing the affected page and removing any shortcodes or custom HTML. If the page uses a custom template, check the template file for errors.
I see a 500 error only when trying to log in to wp-admin. What do I do?
This is typically caused by a plugin that modifies the login process. Deactivate all plugins via FTP (rename the plugins folder) and try logging in again. If that works, reactivate plugins one by one to find the offender. Security plugins and login customisation plugins are the most common causes.
Can a 500 error affect my SEO?
Yes. If Google’s crawler encounters a 500 error when trying to index your pages, it will stop indexing them. If the error persists, your pages will eventually be dropped from the search index. Google Search Console will report the 500 errors in the Coverage report. The longer the error persists, the more damage to your rankings. This is why rapid resolution matters.
Need Expert Help? Let WP Ministry Handle It
The 500 Internal Server Error can have many causes, and troubleshooting them requires methodical testing at multiple levels — WordPress code, server configuration, and hosting infrastructure. If you are not comfortable with FTP access, PHP configuration, and error log analysis, or if you simply need your site fixed as fast as possible, our 24/7 team is here.
Call (901) 249-0909 for immediate assistance. One-time fixes start at $199 through our one-time fix service. Or choose a care plan to prevent these errors through proactive daily maintenance, monitoring, and support.
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