Shopify's Aug 26 Thank You Page Upgrade

On August 26, 2026, Shopify will automatically upgrade the Thank You and Order status pages of every non-Plus store, and the additional scripts field will stop executing permanently. Merchants who haven't migrated their tracking could lose conversion data silently.

What Happened

Shopify is completing the final phase of its checkout extensibility migration. On August 26, 2026, stores on Basic, Shopify, and Advanced plans that have not manually upgraded their Thank You and Order status pages will be upgraded automatically. From that moment, the additional scripts field on those pages stops executing permanently, and Shopify will not run it again.

Plus stores already went through this transition: checkout.liquid and additional scripts on checkout pages stopped working in August 2025, with automatic upgrades beginning in January 2026. The August 26 date is the equivalent deadline for the much larger group of non-Plus merchants, most of whom do not have a developer on retainer. Stores created before January 6, 2025 that upgrade manually, while keeping existing customizations, get a 30-day revert window as a safety net.

Key Facts

The automatic upgrade hits Basic, Shopify, and Advanced plans on August 26, 2026, two days from now.
After the upgrade, the additional scripts field never executes again on the Thank You and Order status pages.
Stores created before January 6, 2025 that upgrade manually keep a 30-day revert window while they verify tracking.
Plus stores lost checkout.liquid and additional scripts on these pages back in August 2025, with auto-upgrades from January 2026.
The change is part of Shopify's checkout extensibility migration to web pixels, app blocks, and checkout UI extensions.

Why This Matters for Shopify Merchants

The dangerous part is what does not happen: nothing visibly breaks. Checkout keeps working and orders keep flowing, but the reporting layer fails silently. Google Ads conversion tags, the Meta pixel, Google Tag Manager containers, affiliate scripts, post-purchase surveys, and order-tracking widgets that were injected through additional scripts all stop firing, without a single error message.

The first symptom most merchants notice is an ad platform quietly reporting fewer conversions than the Shopify admin shows. By then, days of conversion data may be gone, ROAS calculations are skewed, smart bidding campaigns are optimizing against incomplete signals, and affiliate partners are disputing commissions. For any store that relies on paid acquisition, that is a direct hit to both revenue and measurement trust, arriving right before the Q4 planning season.

What Merchants Should Do Now

Open Settings > Checkout and copy everything in the additional scripts field into a document now, before the upgrade makes it unreadable in practice.
Map each script to its replacement: conversion tags to web pixels or app pixels, content blocks to app blocks, and custom UI to checkout UI extensions.
Reinstall or update any app that previously injected scripts into these pages, because older app versions will not ship the new app pixel.
Place a real test order and confirm the conversion lands in every ad platform, Google Ads, Meta, and affiliate dashboards, not just in Shopify's own reports.
Upgrade manually before August 26 rather than waiting for the automatic upgrade, so you keep the 30-day revert window while you verify everything still tracks.

Original Source

Original source: Shopify Help Center
Original publication: 2026-08-24
Coverage updated: 2026-08-24