WooCommerce Checkout Not Working? Here’s How to Fix It (Complete Step-by-Step Guide)

If your WooCommerce checkout page is not working, your customers cannot complete their orders. That means lost sales, abandoned carts, frustrated buyers, and lower revenue for your business.

For an online store, the checkout page is the most important part of the buying process. A visitor can browse products, add items to the cart, and be ready to buy — but if checkout fails, the sale is gone.

Even a few hours of checkout downtime can cost real money.

We’ve seen store owners lose dozens of orders because of broken payment gateways, plugin conflicts, JavaScript errors, and server-level issues.

The good news? Most WooCommerce checkout issues can be fixed if you follow the right troubleshooting steps.

Before hiring a developer, try these fixes first.

• WooCommerce checkout page not loading
• WooCommerce checkout keeps refreshing
• Place Order button not working
• WooCommerce payment failed
• Session expired error
• Blank checkout page
• Checkout AJAX error

Why WooCommerce Checkout Stops Working

Before fixing the issue, it’s important to understand what causes it.

WooCommerce checkout usually breaks because of:

• Plugin conflicts
• Theme compatibility problems
• Payment gateway configuration errors
• JavaScript conflicts
• Cached checkout pages
• Expired WooCommerce sessions
• Missing checkout shortcode
• SSL problems
• Server firewall restrictions
• Low PHP memory limit

Sometimes the problem starts after updating plugins. Other times it happens because of hosting configuration changes.

Try These DIY Fixes First

Start with these simple fixes before moving into advanced troubleshooting.

1. Update WooCommerce, Theme, and Plugins

Outdated files often create compatibility problems.

Go to:

Dashboard → Updates

Update:

• WooCommerce
• Your active theme
• Payment plugins
• Shipping plugins

After updating, test the checkout page again.

2. Disable All Plugins Except WooCommerce

Plugin conflicts are one of the most common reasons checkout stops working.

To test:

1. Go to Plugins
2. Deactivate all plugins except WooCommerce
3. Test checkout

If checkout works, activate plugins one by one.

This helps identify the conflicting plugin.

3. Switch to Default Theme

Some custom themes override WooCommerce templates incorrectly.

Temporarily switch to:

• Storefront
• Twenty Twenty-Six

If checkout works after switching, your theme is the issue.

4. Check the Checkout Page Shortcode

Your checkout page must contain:

[woocommerce_checkout]

If this shortcode is missing, the page will break.

Go to Pages → Checkout and verify it exists.

5. Clear Cache and CDN

Cached checkout pages often cause expired sessions and broken order placement.

Clear:

• Plugin cache
• Browser cache
• Hosting cache
• CDN cache

6. Fix Checkout Page Keeps Refreshing

If checkout keeps refreshing instead of processing the order, it usually means validation failed.

Possible reasons:

• Required fields missing
• Session expired
• Payment gateway validation failed
• JavaScript issue

Check all required fields and test again.

7. Fix Place Order Button Not Working

If the Place Order button does nothing, JavaScript is often responsible.

Open browser console:

1. Press F12
2. Open Console tab
3. Look for red errors

JavaScript conflicts often come from themes, sliders, analytics, or custom checkout plugins.

8. Fix Payment Failed Errors

Payment failures are another common issue.

Common errors:

Payment could not be processed
Transaction declined
Invalid payment method
Session expired

Check:

• API keys
• Webhook URLs
• Live/Test mode
• Currency settings
• Gateway account status

Advanced WooCommerce Checkout Fixes

If the simple fixes didn’t work, move to advanced troubleshooting.

9. Enable WordPress Debug Logs

Hidden PHP errors can break checkout silently.

Add this in wp-config.php:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);

Then check:

/wp-content/debug.log

This often reveals plugin errors, fatal errors, and PHP warnings.

10. Check WooCommerce Logs

WooCommerce stores logs for payment and API issues.

Go to:

WooCommerce → Status → Logs

Look for:

• Webhook failures
• Payment API errors
• Gateway timeouts

11. Reset Permalinks

Broken permalinks can affect checkout URLs.

Go to:

Settings → Permalinks

Click Save Changes.

This refreshes URL rewrite rules.

12. Increase PHP Memory Limit

WooCommerce stores with multiple plugins often need more memory.

Add this:

define('WP_MEMORY_LIMIT', '256M');

Low memory can break checkout requests.

13. Check SSL and HTTPS Setup

Payment gateways require secure checkout pages.

Make sure:

• SSL certificate is active
• Checkout uses HTTPS
• No mixed content errors exist

14. Check Hosting Firewall or ModSecurity

Some hosting firewalls block WooCommerce AJAX requests.

Ask your host:

• Is ModSecurity blocking checkout?
• Are firewall rules blocking AJAX?
• Are rate limits active?

When Should You Stop DIY and Contact a WooCommerce Expert?

Some checkout issues are simple. Others can become dangerous if you keep changing files without understanding the root cause.

You should contact an expert if:

• Your checkout uses custom-coded functions
• Payment gateway webhooks are failing
• Server logs show fatal errors
• Database sessions are corrupted
• Theme overrides are broken
• Orders are being created but payments fail

Frequently Asked Questions

Final Thoughts

WooCommerce checkout issues can feel stressful because every failed checkout means a lost customer.

The good thing is that most issues can be fixed by checking plugin conflicts, payment settings, cache, sessions, logs, and server configuration.

Start with the DIY fixes first. They solve most common checkout issues.

If your store is still losing orders after trying everything above, it’s better to fix it properly before the problem gets worse.