Guide

checkout.liquid Ends for Non-Plus Stores on 26 August 2026

Short answer: If your Shopify store is on Basic, Grow or Advanced and you have custom code or third-party script tags running on your Thank you or Order status pages, they stop working on 26 August 2026. The most common casualty is post-purchase conversion tracking. Check your store now; a fix is usually a day or two of work, not a rebuild.

Shopify Plus stores already went through this on 28 August 2025. Non-Plus stores are next, and the deadline is close.

What exactly is being switched off

It helps to be precise, because “checkout.liquid is going away” has been said in various forms since 2023 and each wave affected different pages.

August 2024: checkout.liquid became unsupported for the Information, Shipping and Payment steps. Already done, for everyone.
28 August 2025: checkout.liquid and additional scripts were sunset for the Thank you and Order status pages. Script tags on those pages were sunset for Plus stores on the same date.
26 August 2026: Script tags on the Thank you and Order status pages are sunset for non-Plus stores.

That last line is the one to act on. Stores still relying on checkout.liquid for the Thank you and Order status pages must move to Shopify Extensions in Checkout.

What actually breaks

In practice, four categories.

1. Post-purchase analytics and conversion tracking. This is the big one, and it is the one merchants notice last, because nothing on the storefront looks broken. Google Ads conversion tags, Meta pixels, TikTok pixels, affiliate tracking and any bespoke analytics injected via script tags on the order status page simply stop firing. Your ad platforms keep spending; they just stop learning.

2. Post-purchase upsell and survey tools. Anything that injected UI into the thank-you page via a script tag rather than a proper checkout UI extension.

3. Loyalty and referral widgets. Several older loyalty apps placed their post-purchase enrolment prompt this way.

4. Custom order status content. Delivery instructions, custom messaging, warranty registration links — anything a previous developer added to the order status page in Liquid.

The pattern worth noticing: none of these produce an error. They just go quiet. If you are running paid acquisition, silent conversion tracking failure is expensive in a way that takes weeks to show up in reporting.

How to check your store in ten minutes

You do not need a developer for the first pass.

Shopify admin → Settings → Checkout. If you see any reference to a custom checkout.liquid or additional scripts on the Thank you / Order status pages, you have work to do.
Settings → Apps and sales channels. Look for older analytics, loyalty, referral, survey and post-purchase upsell apps. Check each one’s documentation for a checkout extensibility update. Apps that have not been updated since 2024 are the highest risk.
Place a test order. Open your browser’s developer console on the thank-you page and check the network tab for your tracking calls. If you can see your Google Ads or Meta conversion firing, note how it is firing — via a Web Pixel, or via an injected script tag.
Settings → Customer events. Anything already implemented as a Web Pixel here is safe. This is the destination, not the problem.

If steps 1 to 3 come back clean, you are done. A large number of smaller UK stores never customised the order status page at all and genuinely have nothing to do.

What the fix looks like

There are three replacement mechanisms, and the right one depends on what you were doing.

Web Pixels replace analytics and tracking script tags. This is where conversion tracking belongs now — Google Ads, Meta, GA4, TikTok. Most major platforms have a native Shopify Web Pixel; the work is configuration and verification rather than code.

Checkout UI extensions replace injected interface elements: upsell blocks, surveys, custom fields, loyalty prompts, custom messaging. These are proper extensions with defined targets, which is a meaningful upgrade — they survive theme changes and Shopify updates.

Shopify Functions replace Shopify Scripts, which were a separate deprecation (editing ended April 2026, execution ended 30 June 2026). If you were running Scripts for discount or shipping logic on Plus, that has already lapsed.

What it costs

For a typical UK store on Basic, Grow or Advanced with a few tracking pixels and one or two post-purchase widgets, this is half a day to two days of development work. At typical UK contractor rates of £350–£450 per day, that is £175–£900 all in.

Where it gets more expensive is stores with genuinely bespoke post-purchase logic — custom warranty registration, B2B order confirmation flows, integrations that fired off the order status page into an ERP or fulfilment system. Those need rebuilding as checkout UI extensions, and can run to £3,000–£8,000 depending on complexity.

The cheap outcome and the expensive outcome are separated almost entirely by whether the original implementation used script tags as a shortcut for something that should have been server-side. Verifying which camp you are in takes an hour.

What to do this week

With under three weeks to the deadline, the sequence is:

Run the ten-minute check above.
If anything turns up, get your conversion tracking migrated to Web Pixels first. It is the highest-value item and usually the fastest.
Handle UI elements second. A missing upsell widget costs you margin; a missing conversion signal costs you your ad spend.
Place a test order after every change and verify in the platform, not just in Shopify.

Missing the deadline is not catastrophic — nothing gets suspended, and you can fix it afterwards. But you will have lost the tracking data in between, and that data is what your bidding algorithms run on.

Frequently asked questions

Does this affect my store if I am on Shopify Basic? Yes. Basic, Grow and Advanced are all non-Plus, and the 26 August 2026 date applies to all of them.

I am on Shopify Plus. Do I need to do anything? Plus stores went through this on 28 August 2025. If your store is working correctly today, you are done.

Will my store go down on 26 August? No. Your storefront and checkout are unaffected. The change is limited to script tags and checkout.liquid on the Thank you and Order status pages.

How do I know if I have custom checkout code? Check Settings → Checkout in your Shopify admin for additional scripts, and place a test order to inspect what runs on the thank-you page. If a developer built anything post-purchase for you, assume it needs checking.

Will my Google Ads conversion tracking break? It will if it is implemented as an injected script tag on the order status page. If it runs as a Web Pixel under Settings → Customer events, it is fine.

What is the difference between a script tag and a Web Pixel? A script tag injects arbitrary JavaScript into a page. A Web Pixel runs in a sandboxed environment with a defined event API. Shopify is retiring the former on checkout pages in favour of the latter, largely for performance and privacy reasons.

Do I need to upgrade to Shopify Plus? No. Checkout extensibility, Web Pixels and checkout UI extensions are available on non-Plus plans. Some advanced checkout customisation remains Plus-only, but nothing required to meet this deadline — see our Shopify vs Plus comparison if you’re weighing it up for other reasons.

What happens if I miss the deadline? Affected scripts stop running. There is no penalty and no store suspension, but you lose whatever those scripts were doing until you fix it.

Does this affect Shopify Scripts too? Shopify Scripts was a separate deprecation. Editing ended 15 April 2026 and execution ended 30 June 2026. If you were using Scripts, that has already stopped.

Can my existing apps handle this automatically? Well-maintained apps have already shipped checkout extensibility versions and will migrate you when you update. Apps that have not been updated in two years are the ones to worry about.

Last reviewed August 2026. Shopify occasionally revises deprecation dates — confirm the current date against Shopify’s changelog before planning around it.

Not sure whether your post-purchase tracking survives the deadline? We audit and migrate checkout customisation for UK stores, and handle the ongoing maintenance once it’s done. Get in touch.