What changed
Shopify says August 26, 2026 is the deadline for non-Plus stores to upgrade legacy Thank you and Order status pages. Stores that do not upgrade are auto-upgraded. Existing page customizations can be replaced, and unsupported additional scripts, apps that rely on legacy script tags and other deprecated customizations need supported replacements.
Why it matters
Post-purchase analytics, conversion tracking, upsells, custom messages and app behavior often live on these pages. An automatic page replacement can silently remove those behaviors unless merchants and app developers migrate before the cutoff and verify the resulting event flow.
The deadline is for non-Plus stores
Shopify's current non-Plus guide sets August 26, 2026 as the deadline. Plus stores followed a different earlier timetable, so teams should not reuse Plus migration dates or assumptions.
Legacy customizations need supported extension points
Shopify directs merchants to blocks for page functionality and design, web pixels or app pixels for tracking, and compatible apps for custom behavior. The upgrade guide surfaces installed apps that are compatible or still require developer action.
Auto-upgrade can be operationally lossy
If a store remains on the legacy pages after the deadline, Shopify says the pages are auto-upgraded. Because the old customizations are replaced, builders should treat this as a production migration rather than a cosmetic admin change.
App developers have a customer-support obligation
Apps that historically injected scripts or relied on deprecated extension points should provide supported replacements and clear migration instructions. Merchants cannot fix an incompatible third-party app solely from checkout settings.