What Happened to Shopify Scripts
The deprecation timeline
Shopify Scripts let merchants write custom Ruby-based logic for discounts, shipping rates, and payment methods directly in the checkout flow. Shopify began deprecating it in favour of Shopify Functions well before the June 30, 2026 cutoff, giving merchants a migration window. That window is now closed. Any store still running Scripts-based logic after June 30 has that logic disabled, not paused, not warned, disabled.
Why Shopify made this change
Shopify Functions run in a sandboxed, more performant execution environment than Scripts did, and they integrate with the newer Checkout Components framework that reached general availability in the same Summer '26 Edition, as announced in Shopify's own Editions Summer '26 announcement.
The stated goal across Shopify's own Editions communications is consistency: checkout customisations built on Functions stay upgrade-safe across Shopify's evolving checkout system, whereas Scripts and theme-level workarounds routinely broke during platform updates.
Is Your Store Still Affected?
How to check if you were running Scripts
If you or a previous developer wrote custom logic in Shopify's Script Editor for discounts, shipping rate manipulation, or payment method availability, and that logic hasn't been touched since before June 2026, your store is very likely running without it right now. Check your admin for any reference to Scripts, and check with whoever built your original checkout customisations if you're not sure.
Signs your checkout logic silently stopped working
The most common signs are:
- A custom discount rule you expected to apply at checkout no longer does
- A shipping rate that was supposed to be hidden or modified is showing incorrectly
- A payment method you customised the availability of is back to its default behaviour
None of these throw an obvious error message, which is exactly why stores can run for weeks without noticing.
Migrating from Scripts to Shopify Functions
What Shopify Functions actually are
Functions are small, sandboxed pieces of backend logic that plug into specific extension points in Shopify's checkout, discount, and shipping systems. Unlike Scripts, they're built using Shopify's supported extensibility framework rather than custom Liquid or Ruby workarounds, which is what keeps them stable across future platform updates.
What the migration process looks like
Each piece of Scripts logic needs to be re-implemented as an equivalent Function: discount logic maps to Shopify's discount Functions API, shipping logic to the delivery customisation API, and payment method logic to the payment customisation API. This isn't a like-for-like code port, the underlying architecture is different enough that most Scripts implementations need to be rebuilt rather than translated line by line.
What to prioritise first
If you haven't migrated yet, prioritise whichever piece of logic has the biggest revenue impact, usually discount rules, since that's the most common Scripts use case and the one most likely to be silently costing you sales or margin right now. Shipping and payment customisations, while important, are less likely to cause immediate revenue loss if they're temporarily reverted to default behaviour.
The Bigger Picture: Shopify Is Absorbing the App Layer
The Scripts sunset isn't an isolated event, it's part of a broader pattern across Shopify's Summer '26 Edition. Native AI merchandising, native A/B testing, and native B2B net terms all shipped in the same release, several of them doing jobs merchants previously paid third-party apps to handle. The practical takeaway, which industry analysis of the Summer '26 Edition has highlighted: this is a good moment to audit which paid apps in your store now overlap with something Shopify does natively, not just to fix the Scripts gap.
The app-overlap audit is a separate project from the Scripts migration, but both are worth completing before the next major Shopify release changes the landscape again.
The Reality of Handling This In-House
Migrating Scripts logic to Functions requires understanding Shopify's newer extensibility APIs, which are genuinely different from the Liquid and Ruby patterns most Shopify developers built expertise in over the past several years. If your original checkout customisation was built by a developer who's since moved on, or by an agency you no longer work with, you're often starting from reverse-engineering what the old Script was doing before you can even begin rebuilding it as a Function.
That reverse-engineering step is where most of the actual time goes, not the Functions code itself.
Where We Fit
If you built your own Scripts logic and you're comfortable with Shopify's Functions APIs, this migration is very doable solo, Shopify's own developer documentation covers the technical mechanics well. Where we come in is for stores that need this diagnosed and rebuilt quickly, especially when the original Scripts logic wasn't documented anywhere and needs to be reconstructed from checkout behaviour alone.
That's checkout-critical work, $30 an hour, written scope before any billing starts. See our Shopify developer hire page or our Shopify development agency overview.
Working on a Shopify Scripts-to-Functions migration project?
Written scope before billing. $30/hr. We tell you if we're not the right fit.
Akash Singh
·View full profileCTO and Co-Founder, CV Infotech · Gurugram, India
Akash has been building software for clients in the USA, UK, Australia, and Canada since 2012. He leads a 100% in-house team and personally manages every client relationship and technical decision. Francisco Escobar has worked with him since 2012. Steven has trusted the team with his AI platforms since 2019. 512 verified 5.0 reviews on Freelancer.com.