WordPress 500 Internal Server Error: What It Means and How to Fix It
TL;DR
A WordPress 500 Internal Server Error means the server hit an unexpected problem but won’t tell you what it was. The most common causes are a corrupted .htaccess file, a misbehaving plugin, or a PHP memory limit. To fix it: rename your .htaccess file, deactivate all plugins via FTP, or increase your PHP memory limit. If none of that works, check your server error logs. If your site is down right now and you need it back fast, schedule a free assessment with Your WP Guy.
In This Post
You go to check your website and instead of your homepage, you get this:
500 Internal Server Error
No explanation. No helpful hint. Just a broken site and a sinking feeling in your stomach.
If you’re running a WordPress site, this is one of the most frustrating errors you can hit. It’s vague by design: the server knows something went wrong, but it won’t tell you exactly what. That’s cold comfort when customers are trying to reach you and every minute of downtime is costing you business.
Here’s what you need to know.
What Does a 500 Internal Server Error Actually Mean?
The 500 error is a catch-all response from your web server. It means the server ran into an unexpected condition and couldn’t fulfill the request. It doesn’t specify why.
Think of it like your car’s check engine light. Something is wrong. Could be minor, could be serious. You won’t know until someone looks under the hood.
On a WordPress site, the most common culprits are:
- A PHP error triggered by a plugin or theme
- A corrupted or misconfigured .htaccess file
- A PHP memory limit that’s been hit
- A file or folder with incorrect permissions
- A failed or partial WordPress core update
Any one of these can take your site completely offline.
Why WordPress Sites Are Especially Vulnerable
WordPress is powerful, but it’s also a moving ecosystem. You’ve got WordPress core, your theme, and potentially dozens of plugins all running at once. When they don’t play nicely together (or when something updates without warning) a 500 error is often the result.
We manage over 100 active client sites, and we’ve seen this error caused by everything from a routine plugin update to a hosting provider changing their PHP version overnight. The trigger isn’t always obvious, and tracking it down takes real diagnostic work.
If you’re not comfortable digging through server logs and editing files via FTP, this is the point where a lot of site owners get stuck.
How to Fix a WordPress 500 Internal Server Error
Here’s a structured path through the most common fixes. Work through these in order.
1. Refresh the Page (Seriously)
Sometimes a 500 error is a momentary hiccup on the server’s end. Refresh once. If it clears, you’re done. If not, keep going.
2. Check Your .htaccess File
Your .htaccess file controls how your server handles requests. If it gets corrupted (often during a WordPress update or a plugin change) it can cause a 500 error across your entire site.
Access your site via FTP or your hosting file manager. Navigate to your root WordPress directory and rename the existing .htaccess file to something like .htaccess_old. WordPress will regenerate a clean version when you visit your admin dashboard.
If renaming the file fixes the error, the old .htaccess was the problem. Go to Settings > Permalinks in WordPress and click Save Changes to regenerate a fresh one.
3. Deactivate All Plugins
A misbehaving plugin is the single most common cause of 500 errors. The challenge is you often can’t get into your WordPress admin to deactivate them.
The solution: use FTP or your hosting file manager to navigate to wp-content/plugins and rename the entire plugins folder (try plugins_disabled or something you’ll remember). When WordPress can’t find the plugins folder, it deactivates everything automatically.
If your site comes back, you’ve confirmed a plugin is the culprit. Rename the folder back to plugins, then reactivate plugins one at a time until the error returns. That’s your bad actor.
4. Switch to a Default Theme
If disabling plugins doesn’t fix it, the problem may be in your active theme. Use FTP to navigate to wp-content/themes and rename your active theme folder. WordPress will fall back to a default theme.
If the error clears, your theme had a conflict or code issue.
5. Increase the PHP Memory Limit
WordPress sometimes hits a memory ceiling and throws a 500 error when it does. You can increase the PHP memory limit by adding a line to your wp-config.php file:
define('WP_MEMORY_LIMIT', '256M');If your hosting plan allows it, this often resolves errors that occur during heavy operations like running WooCommerce or large page builders.
6. Check File Permissions
WordPress needs specific folder and file permissions to run correctly. Folders should be set to 755 and files to 644. Incorrect permissions (often caused by FTP uploads or migrations) can trigger 500 errors.
You can check and update these through your hosting control panel or via FTP.
7. Check Your Error Logs
If none of the above resolves it, it’s time to look at your server’s PHP error log. This is where the actual cause gets recorded. You’ll find it in your hosting control panel (usually under Logs or Error Logs) or in your site’s root directory.
The log will point you directly at the file and line causing the error. From there, it’s a targeted fix rather than guesswork.
What If You Can’t Figure It Out?
That’s a completely fair place to land. The 500 error is one of the trickier ones because the cause isn’t obvious from the outside. Tracking it down requires server access, error log interpretation, and a methodical approach. None of which are things most business owners signed up for.
Reactive website support is a cost you can’t afford. When a 500 error hits, every minute your site is down is a minute customers are bouncing to a competitor. And if you’re troubleshooting by trial and error without a backup, you risk turning a recoverable situation into something worse.
This is exactly what we handle for our clients every day.
What Your WP Guy Can Do
When one of our clients hits a 500 error, they don’t have to touch FTP, dig through error logs, or play the plugin deactivation game. They reach out to us, and we get to work.
Every one of our WordPress care plans includes active monitoring, regular backups, and direct access to someone who actually knows WordPress. You’re not getting a chatbot or an overseas ticket queue. You’re getting fast, personal support from a team that’s seen this error (and every variation of it) more times than we can count.
If your site is down right now and you need help, schedule a free assessment. We’ll take a look, tell you exactly what’s going on, and get you back online.
And if you want to make sure this never catches you off guard again, take a look at our WordPress care plans. Because the best time to have WordPress support in place is before you need it.
FAQ: WordPress 500 Errors
What causes a 500 Internal Server Error in WordPress?
The most common causes are a corrupted .htaccess file, a plugin conflict, a PHP memory limit being exceeded, incorrect file permissions, or a failed WordPress core update. The 500 error is a catch-all, so the specific trigger varies by site. Checking your PHP error log is the fastest way to find the exact cause.
How do I fix a WordPress 500 error without access to the admin dashboard?
Use FTP or your hosting control panel’s file manager. The two fastest first steps: rename your .htaccess file to .htaccess_old, and rename your plugins folder to plugins_disabled. Either action will often restore access to your site immediately. From there you can identify and fix the underlying cause.
Can a WordPress plugin cause a 500 Internal Server Error?
Yes, and it’s the single most common cause. A plugin that has a PHP error, conflicts with another plugin, or breaks during an update can take your entire site down. Deactivating all plugins via FTP is usually the fastest way to confirm whether a plugin is responsible.
How do I prevent 500 errors on my WordPress site?
The best prevention is proactive maintenance. Keep WordPress core, themes, and plugins updated. Have daily backups so you can restore quickly if something breaks. Avoid installing plugins from unverified sources. And work with a WordPress maintenance provider who monitors your site around the clock, so issues get caught before they take you offline.
Is a 500 Internal Server Error a hosting problem?
Sometimes, but not always. Hosting issues like server overloads or PHP version changes can trigger a 500 error, but most of the time the cause is within your WordPress installation itself. If you’ve ruled out plugins, themes, .htaccess, and file permissions and the error persists, contact your host to check for server-side issues.
About the Author
Jonathan Wofford is the founder of Your WP Guy, a WordPress care and maintenance service supporting over 100 active client sites. He and his team specialize in keeping WordPress sites fast, secure, and running, so business owners can stay focused on their business instead of their website. Schedule a free assessment.