A 500 Internal Server Error in WordPress can make your website unavailable to visitors, prevent you from accessing the WordPress dashboard, or interrupt important functions such as checkout and form submissions.
The error can be frustrating because the browser usually does not explain what went wrong. The underlying cause may be a corrupted .htaccess file, a faulty plugin, a theme compatibility issue, a PHP fatal error, insufficient resources, or a server configuration problem.
The good news is that you can investigate most WordPress 500 errors systematically without reinstalling your entire website.
In this guide, you will learn how to fix the 500 Internal Server Error in WordPress, protect your website before making changes, troubleshoot common causes, and identify when you should contact your web hosting provider.
What Is a 500 Internal Server Error in WordPress?
A 500 Internal Server Error is a generic HTTP status code indicating that the server encountered an unexpected problem while processing a request.
Unlike a 404 error, which usually means a requested resource could not be found, a 500 error indicates that the server could not complete the request successfully.
You might see messages such as:
- 500 Internal Server Error
- HTTP Error 500
- Internal Server Error
- The server encountered an internal error or misconfiguration
- This page isn’t working
The error may affect your entire WordPress website or only specific pages, such as /wp-admin/, a contact form, or the checkout page.
Important: A 500 error does not automatically mean your website’s database is corrupted or your hosting server is down. The actual cause must be identified before choosing a fix.
Common Causes of the WordPress 500 Internal Server Error
Several issues can trigger an HTTP 500 error on a WordPress website.
| Possible cause | What may happen |
|---|---|
Corrupted .htaccess file |
Invalid rewrite rules or configuration directives cause server errors |
| Faulty WordPress plugin | A plugin triggers a PHP fatal error or conflicts with another plugin |
| Theme compatibility issue | Theme code fails or conflicts with the current WordPress or PHP version |
| PHP memory limit | A script uses more memory than the available limit |
| PHP compatibility problem | Code uses unsupported functions or incompatible syntax |
| Incorrect file permissions | The server cannot access files or directories as required |
| Corrupted WordPress core files | Essential WordPress files are missing or damaged |
| Server configuration issue | Web server, PHP handler, security rules, or other server settings cause the failure |
These are possible causes, not a diagnosis. Checking the server error log is often the fastest way to narrow down the problem.
Before You Start: Back Up Your WordPress Website
Before editing configuration files, disabling plugins, or replacing WordPress files, create a backup.
A complete WordPress backup should include:
- Website files: Your WordPress installation, themes, plugins, uploads, and configuration files.
- Database: Your posts, pages, users, settings, and other stored WordPress information.
- Restore point: Confirm that you can access the backup and know how to restore it if something goes wrong.
If your hosting control panel provides backup tools, check whether a recent backup exists and whether it includes both files and the database. Download a copy when practical.
If you cannot access the WordPress dashboard, you can use your hosting control panel’s file manager or an available FTP/SFTP connection to back up the relevant files.
Avoid making several changes at once. Test the website after each step so you can identify which change resolved the issue.
Method 1: Check the Server Error Log
Start here if you have access to your hosting control panel. The error log may reveal the actual reason for the 500 response.
Step 1: Open your hosting control panel
Sign in to your hosting account and open the control panel provided by your hosting company.
If your account uses cPanel, look for the Errors interface or the relevant PHP and web server error logs available to your account. The exact interface depends on your hosting configuration.
Step 2: Reproduce the error
Open the page that produces the 500 error and note the time it occurs.
For example, if the error appears when opening /wp-admin/, load that page once and record the approximate time.
Step 3: Check the latest log entries
Look for entries that match the time of the failed request. Common clues include:
PHP Fatal errorAllowed memory size exhaustedMaximum execution time exceededPermission deniedInvalid command- References to a particular plugin or theme file
Step 4: Apply the fix indicated by the log
If the log identifies a plugin file, investigate that plugin. If it mentions an invalid configuration directive, inspect the relevant configuration file. If the issue concerns memory allocation, review the PHP memory limit and resource usage.
If you cannot access the relevant logs, contact your hosting provider and ask them to check the server error log for the exact time of the failure.
Official reference: WordPress Common Errors
Method 2: Check and Regenerate the .htaccess File
A corrupted .htaccess file can cause a 500 Internal Server Error on Apache-based hosting environments.
This file may contain rewrite rules, redirects, access restrictions, or other configuration directives.
Step 1: Open your website’s root directory
Use your hosting control panel’s file manager or an available FTP/SFTP client.
Navigate to your WordPress installation directory, which commonly contains:
wp-adminwp-contentwp-includeswp-config.php
Enable the option to show hidden files if you cannot see .htaccess.
Step 2: Back up the file
Download the existing .htaccess file or create a copy of it.
Do not delete the original without preserving a backup.
Step 3: Rename .htaccess temporarily
Rename the file to something such as:
.htaccess_backup
Use the exact filename without the spaces shown around it above.
Now reload the page that previously returned the 500 error.
If the error disappears, the original file or one of its rules may have caused the problem.
If the error persists, restore the original filename before proceeding to other checks unless you have a reason to leave the file disabled temporarily.
Step 4: Generate fresh WordPress rewrite rules
If renaming the file resolves the error, log in to your WordPress dashboard and navigate to:
Settings → Permalinks → Save Changes
You generally do not need to change your permalink structure. Saving the settings can regenerate the standard WordPress rewrite rules when the server configuration and file permissions permit it.
If you cannot access the dashboard, or your installation uses custom rewrite rules, consult your hosting provider or developer before replacing those rules.
Important: Do not use generic .htaccess rules blindly on every server. Apache and LiteSpeed configurations can differ, and custom redirects or security rules may be essential to your website.
Method 3: Disable WordPress Plugins
A faulty plugin or a conflict between plugins is another possible cause of a WordPress 500 error.
If the issue started after installing, updating, or configuring a plugin, investigate that plugin first.
Option A: If the WordPress dashboard works
- Open Plugins → Installed Plugins.
- Deactivate the plugin most recently installed or updated.
- Reload the affected page.
- If the error remains, test other recently changed plugins.
- If the error disappears, investigate the plugin you deactivated before enabling it again.
If you cannot identify the culprit, deactivate plugins systematically and test the site after each change.
Option B: If you cannot access the dashboard
- Open your WordPress installation through the hosting file manager or FTP/SFTP.
- Navigate to
wp-content. - Rename the
pluginsdirectory to a temporary name such asplugins_disabled. - Test the affected page.
This makes the regular plugin directory unavailable to WordPress, helping you determine whether plugins are involved.
If the website starts working, rename the directory back to plugins. Then use the WordPress dashboard, when accessible, to investigate and deactivate problematic plugins individually.
Be careful when restoring plugin directories, particularly on multisite installations or websites with custom deployment workflows.
If disabling plugins does not resolve the error, continue to the next method.
Method 4: Switch to a Default WordPress Theme
Your active theme may contain incompatible code or depend on functionality that is no longer available.
This is particularly worth investigating if the problem started after a theme update, a PHP version change, or a customization.
Step 1: Check whether the dashboard is accessible
If you can log in, navigate to Appearance → Themes.
Activate an installed default WordPress theme that is compatible with your WordPress version.
Step 2: Test the website
Reload the page that returned the 500 error.
If the error disappears, the original theme may be responsible.
Step 3: Investigate the theme
Review recent theme changes, compatibility requirements, custom code in functions.php, and any dependencies required by the theme.
If the dashboard is inaccessible, a developer can help you switch themes through the appropriate database settings or another supported recovery method.
Do not delete the original theme while troubleshooting. Preserve a copy so you can restore your design after identifying the issue.
Official reference: WordPress Common Errors
Method 5: Check PHP Memory Limits and Resource Usage
WordPress executes PHP scripts to generate pages, process requests, and run plugins. If a script exceeds its available memory or other execution limits, it may fail.
A log entry such as Allowed memory size exhausted is a useful clue that memory allocation should be investigated.
Step 1: Check the current PHP configuration
If your hosting account uses cPanel, open MultiPHP INI Editor if it is available. Depending on your provider, other PHP settings interfaces may be used.
Review the PHP version, memory limit, and other relevant limits for your domain.
Step 2: Review the WordPress memory setting
WordPress supports the WP_MEMORY_LIMIT setting in wp-config.php.
For example, a site administrator might configure:
define( 'WP_MEMORY_LIMIT', '256M' );If you add this setting, place it before the line that says That's all, stop editing! Happy publishing.
Before editing the file:
- Make a backup.
- Check whether
WP_MEMORY_LIMITis already defined. - Do not add duplicate definitions.
- Confirm that the hosting environment allows the requested memory allocation.
This setting is a request for the WordPress memory limit, not a guarantee that the server will allocate that amount. Your hosting provider’s PHP configuration and account limits may override it.
Step 3: Ask your hosting provider if necessary
If the log indicates that PHP has reached its memory limit, ask your provider to review the account’s current PHP resource limits and available options.
Simply increasing memory will not fix a plugin that is consuming excessive resources because of a coding error or inefficient process.
Official reference: Editing wp-config.php
Method 6: Check PHP Version Compatibility
WordPress, themes, and plugins must be compatible with the PHP version configured for your website.
If you recently changed PHP versions, an older plugin or custom theme code may produce a fatal error.
How to troubleshoot PHP compatibility
- Check which PHP version your domain currently uses.
- Review the requirements for your WordPress version, active theme, and plugins.
- Check the PHP error log for fatal errors or references to unsupported functions.
- If the problem started after a PHP version change, consult the error log and test a compatible version in a staging environment when possible.
- Ask your hosting provider or developer for help if the appropriate version is unclear.
Do not automatically downgrade to an outdated PHP version just to make the error disappear. Older versions may no longer receive security updates.
Choose a supported PHP version that is compatible with your complete WordPress setup.
Method 7: Review File Permissions
Incorrect file or directory permissions can prevent the web server or PHP process from accessing files it needs.
If the server log reports Permission denied, inspect the permissions and ownership of the affected files and directories.
For a typical WordPress installation, commonly used permission values are:
- Directories:
755 - Files:
644
These are general defaults, not universal requirements. Hosting configurations and security policies can differ.
Do not recursively change permissions across the entire account without understanding your server’s ownership model. Incorrect permissions can create security problems or make the website less functional.
If the affected files have unexpected ownership or permissions, ask your hosting provider to verify and correct them.
Method 8: Check for Corrupted WordPress Core Files
If plugin, theme, .htaccess, and PHP checks do not resolve the error, essential WordPress files may be missing or damaged.
This is more likely if the problem appeared after an interrupted update, an incomplete deployment, or an unexpected file modification.
Safe troubleshooting steps
- Create a complete backup of your website files and database.
- Identify your exact WordPress version.
- Download a clean copy of the same version from the official WordPress website.
- Compare the affected core files with the clean distribution.
- If necessary, replace the relevant core files carefully.
Do not overwrite wp-content or wp-config.php with files from a clean WordPress package. These contain your website’s content, plugins, themes, and configuration.
Replacing core files should be done carefully, preferably on a staging site or with help from a developer or hosting provider.
Official download: https://wordpress.org/download/
Method 9: Check Hosting and Server-Level Problems
Sometimes the cause is outside WordPress itself.
Examples include:
- A PHP handler or web server configuration problem.
- Account resource limits being reached.
- A server-side security rule blocking a request.
- An incorrect redirect or server configuration.
- A temporary hosting infrastructure issue.
If your website continues to return a 500 error after the previous checks, contact your hosting provider.
Provide the affected URL, the approximate time of the failure, the steps you have already tried, and any relevant error log entries.
If you use AmarHost for your website, contact the appropriate support channel for your hosting account and request a review of the server error logs and relevant PHP or web server configuration.
Do not assume that a 500 error automatically requires a more expensive hosting plan. First establish whether the problem is caused by resource constraints, application code, or server configuration.
How to Enable WordPress Debug Logging Safely
If the server error log does not reveal enough information, WordPress debug logging can help identify PHP errors.
Use this method carefully on a live website. WordPress recommends keeping debug messages off the public-facing website to avoid exposing sensitive information.
Step 1: Open wp-config.php
Create a backup, then open the file in your hosting file manager or another suitable file editor.
Step 2: Configure debug logging
If the relevant constants are not already defined, add the following before the line that says That's all, stop editing! Happy publishing.
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );
@ini_set( 'display_errors', 0 );If any of these constants already exist, edit their existing definitions instead of adding duplicates.
Step 3: Reproduce the error
Visit the page that causes the problem once, then inspect:
wp-content/debug.log
The log may contain PHP errors and references to the file or plugin that caused the failure. The file is created only when logging is configured and WordPress can write to the selected location.
Step 4: Turn debugging off
After collecting the information, disable debug mode and restore your intended configuration. If the log contains sensitive information, restrict access to it and remove it when it is no longer needed.
Do not leave debug logging enabled indefinitely on a production site without a specific reason and suitable log-management controls.
Official reference: Debugging in WordPress
What to Do If the WordPress 500 Error Is Not Fixed
If none of these methods resolves the issue, avoid repeatedly editing configuration files or reinstalling WordPress without a diagnosis.
Instead:
- Restore any temporary changes that did not help.
- Confirm that you have a recent, usable backup.
- Record the affected URLs and when the errors occur.
- Collect the relevant server or PHP error log entries.
- Contact your hosting provider or WordPress developer with this information.
A short, relevant log excerpt around the time of the failed request is generally more useful than sending an entire large error log.
Frequently Asked Questions
1. What causes a 500 Internal Server Error in WordPress?
Common causes include corrupted .htaccess rules, plugin or theme conflicts, PHP fatal errors, memory exhaustion, incorrect permissions, corrupted core files, and server configuration issues. Check the error logs to identify the cause.
2. How do I fix a WordPress 500 error without accessing wp-admin?
Use your hosting file manager or FTP/SFTP to back up the site, inspect .htaccess, and temporarily disable plugins by renaming the plugin directory. You can also inspect server logs and ask your hosting provider for assistance.
3. Will resetting .htaccess delete my WordPress content?
Renaming or regenerating .htaccess does not normally delete WordPress posts, pages, or database records. However, custom redirects, access restrictions, and rewrite rules may be affected. Always keep a backup of the original file.
4. Can a WordPress plugin cause a 500 error?
Yes. A plugin can trigger a PHP fatal error, conflict with another plugin, or use more resources than are available. Deactivate plugins systematically and use error logs to identify the responsible component.
5. Does increasing PHP memory fix every 500 error?
No. Increasing PHP memory may help when the error is caused by memory exhaustion, but it will not resolve every plugin conflict, invalid configuration rule, permission issue, or server error.
6. Is a 500 Internal Server Error caused by my web hosting provider?
Not necessarily. The problem may be in WordPress code, a plugin, a theme, or a server configuration. Your provider can help investigate server-level issues and resource limits.
7. Can a WordPress 500 error affect SEO?
Yes. If search engine crawlers repeatedly receive server errors, they may be unable to access affected pages. Persistent availability problems can interfere with crawling and indexing. Resolve the error promptly and verify that important pages return the correct HTTP status once the site is fixed.
8. Should I reinstall WordPress to fix the error?
Reinstallation is not the first step. Diagnose the issue using logs and targeted troubleshooting first. If core files are damaged, carefully replacing the affected files may be sufficient.
Final Thoughts
A 500 Internal Server Error in WordPress can have several causes, but a structured troubleshooting process can help you find the problem without putting your website’s content at unnecessary risk.
Start by checking the error logs, then investigate .htaccess, plugins, themes, PHP compatibility, memory limits, and file permissions. If the issue appears to originate at the server level, ask your hosting provider to investigate before making more extensive changes.
Choosing suitable WordPress hosting is also important for maintaining a reliable website, but the best solution is always the one that addresses the actual cause of the error.
At AmarHost, our goal is to help website owners make informed decisions about website management, hosting, and troubleshooting. Explore more WordPress guides from AmarHost to learn how to maintain and improve your website.