Shopify Scripts to Functions Migration: What to Check Now

Nothing crashed on July 1. That's the part that catches people off guard. A store running Shopify Scripts on June 30 woke up on July 1 to a checkout that looked completely normal: same theme, same product pages, orders still coming through. What was gone was every rule those Scripts used to enforce, a wholesale discount, a hidden payment method, a shipping override tied to a customer tag. None of it threw an error. It just stopped applying, quietly, mid-checkout, on every order since.

The Shopify Scripts to Functions migration is no longer a future deadline. Shopify Scripts were officially deprecated on June 30, 2026, and any Script still published on a store at that point was deactivated for good. If a store hasn't run its audit yet, this is the part of the migration that actually matters now: not "should we migrate before the deadline," but "what already broke, and how long has it been broken."

What Actually Happened on June 30

Every Shopify Script still published anywhere in a merchant's store stopped executing on June 30, 2026, with no rollback and no grace period. Shopify had signaled this for two years, pushing the original date from August 2024 to August 2025 and finally landing on June 30, 2026 as the hard stop. There was an earlier freeze too: from April 15, 2026 onward, merchants couldn't edit or publish new Scripts at all, which meant any bug discovered after that date was permanently unfixable inside the Script Editor.

The mechanism of failure is what makes this dangerous. A broken Script doesn't throw a visible error at checkout. Custom discount rules revert to zero. A B2B customer who should see wholesale pricing pays full retail instead. Shipping rates fall back to whatever Shopify's default configuration shows. Payment methods that were hidden by customer tag or geography either disappear for everyone or become visible to everyone, depending on how the logic was written. Every one of those failure modes looks, from the outside, like a perfectly functioning store.

How to Check If Your Store Is Still Affected

Run the Shopify Scripts customizations report before assuming your migration is complete. It's the only tool that shows what was actually active the moment Scripts stopped executing. From the Shopify admin, go to Apps, then Script Editor, and look for the customizations report banner. It lists every Script that was live, grouped by payment gateways, shipping, and product discounts, along with links to recommended replacement apps or Function tutorials for each one.

A few checks worth running immediately:

1. Pull the customizations report and cross-reference it against what's currently live in Discounts, Delivery customization, and Payment customization in the admin.

2. Compare a wholesale or VIP customer's checkout today against what it looked like in early June. If a discount, shipping option, or hidden payment method doesn't match, that's a dead Script.

3. Check order data from the past three weeks for irregularities: average discount value dropping, wholesale orders paying retail, or shipping revenue shifting unexpectedly.

4. Ask whoever built the original Scripts, if they're still reachable, for a list of what those Scripts actually did. Scripts set up years ago by someone no longer at the company are the most common blind spot.

Why This Hits Loyalty and Membership Programs Hardest

A broken tracking pixel is annoying. A membership discount that silently stopped applying is a direct hit to opt-in and revenue, and it's exactly the kind of failure that doesn't show up on a standard analytics dashboard. If a VIP or member pricing rule was ever built as a Script rather than through a Functions-native app, that rule is gone as of June 30, and the member-facing price comparison that used to justify the membership in the first place may simply not be there anymore.

This matters more for retention programs than almost anything else on a Shopify store, because the entire mechanic depends on a customer seeing their price next to the regular price at the moment they're deciding whether to buy. Take that visibility away without anyone noticing, and opt-in doesn't crash, it just quietly declines while the rest of the dashboard looks unremarkable. Across 200+ brands running membership programs built on Shopify's native checkout, opt-in rates commonly land above 30%, and the top performers clear 45%. That number depends entirely on the pricing comparison actually rendering at checkout, something worth confirming directly rather than assuming still works.

The Three Paths for Replacing a Dead Script

Not every Script needs a custom rebuild. The right replacement depends on how complex the original logic was, and most stores end up using a mix of all three paths. Shopify's own guidance maps each Script type to a specific Function API:

For the first two paths, an app already built on the relevant Function API is usually live within days. For the third, expect a real project: reviewing the report, scoping the logic, building and testing a Function in a dev store, then deploying it carefully. Merchants who treated this as a quick ticket rather than an architectural decision are the ones still finding gaps in late July.

What to Do Right Now

If your store hasn't confirmed every dead Script has a working replacement, the audit takes an afternoon, and the alternative is bleeding revenue you can't see. Start with the customizations report, prioritize anything touching discounts or payment visibility since those carry the most direct revenue risk, and test the replacement against a real customer account before calling it done, not just a default cart.

Membership and loyalty programs deserve a second look specifically, since a silently broken member-price display doesn't generate a support ticket the way a broken tracking pixel does. Subscribfy's membership and loyalty products run on Shopify's native checkout rather than script injection, so client stores were never exposed to this particular failure mode. But any store running a homegrown Script for VIP pricing, tiered discounts, or wholesale rules should treat this audit as done only after someone has actually looked, not assumed.

FAQ

Are Shopify Scripts really gone as of today?

Yes. As of June 30, 2026, Shopify Scripts has been deprecated, and any Script still published on a store at that point was deactivated and stopped working.

Will Shopify tell me if my store is affected?

No. There's no notification when a Script stops working. The checkout keeps loading and orders keep processing normally; the only way to find out is to run the customizations report and compare it against what's actually live.

Can I still see what my old Scripts used to do?

Yes, for a while. The Shopify Scripts customizations report shows the Scripts that were active before deprecation, including their source and description, so you can recreate the logic even though the Scripts themselves no longer run.

Do I need a developer to finish this migration?

Only for complex, store-specific logic. Standard discount, shipping, and payment scenarios are usually covered by existing App Store apps built on Shopify Functions, with no code required.

What's the single highest-risk area to check first?

Anything touching discounts or payment method visibility for a specific customer segment: wholesale pricing, VIP or membership discounts, and tag-based payment gating. These carry direct revenue impact and are the least likely to be noticed without a deliberate check.