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WordPress 404 Error After Permalink Change: 7 Ways to Fix It

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Did you recently change your WordPress permalink settings, and now your posts or pages show a 404 error? You’re not alone.

This is one of the most common WordPress issues beginners encounter. Usually, the homepage continues to work, but individual posts, pages, categories, or products suddenly display:

  • 404 Not Found
  • Page Not Found
  • The requested URL was not found on this server

The good news is that this problem is often easy to fix.

In this guide, you’ll learn why WordPress 404 errors happen after permalink changes and how to restore your website step by step.

What Causes a WordPress 404 Error After Changing Permalinks?

WordPress uses permalink settings to generate URLs for posts and pages. When you change permalink settings, WordPress updates its URL structure and rewrite rules. Sometimes those rewrite rules don’t update correctly.

As a result:

  • Homepage works
  • Admin area works
  • Posts return 404 errors
  • Pages return 404 errors
  • Category archives break
  • WooCommerce products disappear

Most cases are caused by:

  • Corrupted .htaccess file
  • Rewrite rules not updating
  • Plugin conflicts
  • Incorrect server configuration
  • Migration issues

Let’s start with the easiest fixes first.

Before You Start

Before making any changes:

  1. Create a backup of your website.
  2. Write down your current permalink settings.
  3. Keep File Manager or FTP access available.

This allows you to restore changes if needed.

Solution 1: Resave Your Permalink Settings

This is the simplest and most effective fix.

Step 1: Log into WordPress

Navigate to:

yourdomain.com/wp-admin

Step 2: Open Permalink Settings

Go to:

Settings → Permalinks

Step 3: Save Changes

Without changing anything:

Click:

Save Changes

What Should Happen?

WordPress automatically rebuilds its rewrite rules. Now visit a post or page that previously showed a 404 error. If it loads correctly, the problem is solved. If not, continue to the next solution.

Solution 2: Regenerate the .htaccess File

A corrupted .htaccess file is one of the most common causes of permalink-related 404 errors.

Step 1: Open File Manager

Log into your hosting control panel or cPanel.

Open:

File Manager

Navigate to:

public_html

Step 2: Locate .htaccess

Find:

.htaccess

If you don’t see it:

Enable:

Show Hidden Files

Step 3: Rename the File

Rename:

.htaccess

to:

.htaccess-old

Step 4: Generate a New File

Return to:

Settings → Permalinks

Click:

Save Changes

What Should Happen?

WordPress creates a fresh .htaccess file and clears the permalink cache. Test your posts and pages again.

Solution 3: Verify Apache Rewrite Module Is Enabled

If you’re using Apache hosting, WordPress requires mod_rewrite.

Without it, permalink structures won’t work correctly.

How to Check

Ask your hosting provider:

Is mod_rewrite enabled on my hosting account?

Most hosts enable it by default.

What Should Happen?

If mod_rewrite was disabled, enabling it should immediately restore permalink functionality.

Solution 4: Disable Plugins

Some plugins modify permalink structures.

Examples include:

  • Security plugins
  • Redirect plugins
  • SEO plugins
  • Custom URL plugins

If You Can Access WordPress

  1. Go to Plugins.
  2. Deactivate all plugins.
  3. Test your pages.

If You Cannot Access WordPress

Using File Manager:

Navigate to:

wp-content/plugins

Rename:

plugins

to:

plugins-disabled

What Should Happen?

If the pages start working, a plugin is causing the problem. Reactivate plugins individually until the issue returns.

Solution 5: Check Custom Rewrite Rules

Developers sometimes add custom rewrite rules through:

  • functions.php
  • Custom plugins
  • Child themes

If the problem started after adding custom code: Review recent changes carefully.

Look for:

add_rewrite_rule()

or

flush_rewrite_rules()

functions.

What Should Happen?

Removing the problematic code should restore normal URL behavior.

Solution 6: Check Website Migration Settings

Many 404 errors occur after:

  • Moving to a new host
  • Changing domains
  • Restoring backups

Verify:

WordPress Address

Go to:

Settings → General

Check:

WordPress Address (URL)

Site Address

Verify:

Site Address (URL)

Both should match your current website.

What Should Happen?

Incorrect URLs can prevent WordPress from generating proper links. Correcting them may immediately fix broken pages.

Solution 7: Restore the Default .htaccess Rules

If WordPress cannot generate the correct .htaccess file automatically, create one manually.

Replace the contents of .htaccess with:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

Save the file.

What Should Happen?

Refresh your posts and pages.

Most permalink-related 404 errors disappear immediately after restoring the default rules.

Frequently Asked Questions

Why does my homepage work but posts show 404 errors?

This usually means WordPress rewrite rules are broken. Resaving permalinks often fixes the problem.

Will changing permalinks hurt SEO?

Changing permalink structures can affect rankings if redirects aren’t implemented properly. Always create redirects when changing existing URLs.

Can a plugin cause permalink issues?

Yes. Security, redirect, and SEO plugins are common causes.

Does WordPress need .htaccess for permalinks?

On Apache servers, yes. Without a properly configured .htaccess file, permalink URLs often fail.

Related WordPress Errors

WordPress permalink problems often appear alongside other issues. If you’re seeing additional symptoms, these guides may help.

WordPress 403 Forbidden Error

Incorrect .htaccess rules can trigger both 403 and 404 errors.

WordPress 500 Internal Server Error

Server configuration issues sometimes affect permalink processing.

WordPress Critical Error Fix

Plugin conflicts can cause both permalink failures and critical errors.

WordPress White Screen of Death

Fatal PHP errors may prevent WordPress from generating URLs correctly.

WordPress Memory Exhausted Error

Large plugins that modify URLs may consume excessive server resources.

Error Establishing Database Connection in WordPress

Broken database connections can prevent WordPress from loading content properly.

Conclusion

WordPress 404 errors after changing permalinks are usually caused by broken rewrite rules or corrupted files. htaccess files, plugin conflicts, or migration issues.

Start by resaving your permalink settings and regenerating your .htaccess file. Then investigate plugins, server settings, and custom rewrite rules if the issue persists.

In most cases, these simple troubleshooting steps will restore your posts and pages within minutes.