How do I increase PHP max_execution_time for WooCommerce?

Edit your php.ini or add a line to wp-config.php: 'ini_set('max_execution_time', '120');' in your theme's functions.php. If you're on cPanel, use the MultiPHP INI Editor. If using a managed host, contact support. Set max_execution_time to 120 or 300, and memory_limit to 256M. Test checkout after each change.

Can a caching plugin cause checkout timeouts?

Yes. Caching plugins often cache pages, including checkout pages, which can lead to timeouts or errors. Exclude woo-commerce cart, checkout, and my-account pages from caching. If you use LiteSpeed Cache, ensure the 'Do Not Cache' rules for those pages are set. Also, lazy loading on checkout can break scripts. Disable lazy loading for the checkout page if you suspect it.

What should I do if Stripe or PayPal times out at checkout?

First, check your gateway's status page to see if there's an outage. Then increase the HTTP timeout for the gateway API call in your theme's functions.php by adding a filter for 'http_request_timeout' and set to 60. Ensure your webhooks are correctly configured and reachable. If the issue persists, switch to a gateway that supports async callbacks or enable background payment processing in your gateway settings.

Should I switch hosting providers to fix checkout timeouts?

Not always. First, try the fixes above – plugin conflicts, PHP limits, and gateway settings often solve the issue. But if you're on £5-a-month shared hosting, you're likely hitting resource limits. Upgrading to a UK-based managed WooCommerce host or a VPS can give you more consistent performance. Look for providers that offer server-side caching and free SSL, and ensure your hosting package has enough CPU and RAM for WooCommerce.

WooCommerce Checkout Timeout Fix: The UK Merchant’s Guide (2026)

17 August 2026

Fix WooCommerce checkout timeouts for your UK store. Step-by-step solutions for plugin conflicts, hosting limits, payment gateways, and more.

Read this page in: Deutsch

Why Does WooCommerce Checkout Timeout? Understanding the UK Context

Checkout timeouts happen when your WooCommerce store fails to complete the order process within a set time limit. For UK stores, the most common culprits are PHP execution limits, overloaded shared hosting, and payment gateways that take too long to respond. If you're seeing 'ERR_CONNECTION_TIMED_OUT' or a white screen at checkout, it's usually because your server is waiting too long for something – often an external API call to a UK bank or payment provider. The good news is that most timeouts can be fixed with a few targeted tweaks, without replacing your entire setup.

Quick Fixes: PHP Limits and Server Configuration

One of the first fixes is to increase PHP's execution and memory limits. WooCommerce checkout involves loading cart data, calculating UK VAT, and calling payment APIs – all within one request. The default PHP max_execution_time of 30 seconds is often too low for slow external APIs. Edit your php.ini or wp-config.php to set max_execution_time to 120 and memory_limit to 256M. If your UK host uses LiteSpeed, also check the request_terminate_timeout setting. Most reputable UK hosts, including Krystal and 20i, allow these changes through cPanel. After updating, test checkout with a product in GBP.

Plugin and Theme Conflicts: A Systematic Check

A poorly coded plugin is a leading cause of checkout timeouts. UK store owners often run extra plugins for VAT, shipping, or the GDS cookie consent – and any one can block the checkout process. To isolate the problem, temporarily deactivate all plugins except WooCommerce and switch to a default theme like Storefront. If checkout works, re-enable plugins one by one. Pay special attention to payment gateway plugins, cache plugins, and any 'security' plugin that might be scanning requests. Remember to clear your WordPress cache after each change, and do the test using a UK Postcode with a test order.

Payment Gateway Timeouts: Stripe, PayPal, and UK Bank Integrations

Payment gateways are the most common external factor. Stripe, PayPal, and UK bank services like Sage Pay or Worldpay can fail to respond quickly, especially during peak periods like Black Friday. If the gateway doesn't respond within the server's time limit, the checkout times out. Fixes include enabling background processing for Stripe, setting a higher timeout for the gateway API call in your theme's functions.php, and ensuring your webhook endpoints are reachable. Also check that your UK merchant account isn't throttling requests. If using a sandbox, make sure you're switching to the live API keys.

Long-Term Prevention: Caching, CDN, and UK Hosting Choices

Preventing future timeouts is about optimising the whole checkout experience. Start by ensuring your host is powerful enough for WooCommerce – many UK merchants start on budget shared hosting that struggles under load. Upgrade to a UK-based VPS or a managed WooCommerce provider. Use a page cache, but exclude the checkout, cart, and account pages from caching. A CDN like Cloudflare with UK edge nodes can reduce network latency, but be careful with TTFB and POST requests. Finally, keep WooCommerce, WordPress, and all plugins updated to the latest versions, and schedule regular performance audits.

FAQ

Often it's due to server location and network latency. If your server is in the US, UK customers face higher latency, and some home broadband connections may hit timeouts. It can also be caused by a customer's firewall or ISP filtering. Moving to a UK data centre or using a CDN can help, but also check that your theme isn't loading heavy scripts that increase page generation time.

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