On June 30, 2026, Shopify is pulling the plug on Scripts. If you're running custom discount logic, payment filtering, or shipping rules through Scripts Editor, those customizations will stop working. No grace period. No extension. The Shopify Scripts to Functions migration is now mandatory — and most merchants haven't started.

April 15 is the edit freeze — after that date, you can't modify existing scripts. You can only watch the clock run out. Based on Shopify community forums and Reddit threads, most merchants don't fully understand what's replacing them. They don't know how to make the switch.

A broken checkout doesn't send you a warning. It just stops converting. Customers see full prices where they expected discounts, payment options disappear, shipping rates show up wrong. By the time you notice, you've already lost sales. If you're on Shopify Plus and have ever touched Scripts Editor, the next 90 days matter more than you think.

Check If You're Actually Using Scripts (Most Merchants Don't Know)

Scripts run silently. A developer or agency set them up months or years ago, and they just work. That's the problem — you might not remember they exist.

Here's how to check in under 2 minutes:

Log into your Shopify admin
Go to Settings → Apps and sales channels → Script Editor
If Script Editor appears and contains active scripts, you're affected
If it doesn't appear, you're not using Scripts — you can stop reading

Click into each script and read the description. Scripts fall into three buckets: line item scripts (discounts on products), shipping scripts (hiding or renaming shipping rates), and payment scripts (hiding payment methods based on conditions). Write down what each one does. You'll need this list for the migration.

Shopify Scripts to Functions Migration: What Actually Changes

Shopify Functions is the replacement for Scripts, but it's not a 1:1 swap. Scripts used Ruby and ran in a sandboxed environment on Shopify's servers. Functions use Wasm (WebAssembly), run at the edge, and are packaged as Shopify apps.

That last part is the key difference: you can't just paste your old Ruby code somewhere new. Functions are app extensions. You either build a custom app that contains your Functions, or you find a third-party app that already does what your script did.

Functions currently support these extension points:

Product discount — percentage off, fixed amount, buy-X-get-Y
Order discount — discounts applied to the entire cart
Shipping discount — free or reduced shipping based on conditions
Payment customization — hide, reorder, or rename payment methods
Delivery customization — hide, reorder, or rename shipping options
Cart validation — block checkout based on cart contents or customer data

If your script does something on that list, there's a migration path. If it does something unusual — like modifying line item properties or complex tiered pricing based on customer tags — the path gets harder.

The Three Migration Paths (Pick the One That Fits)

Path 1: Use Shopify's built-in discount features. Shopify has expanded native discounts significantly. Automatic discounts, discount combinations, buy-X-get-Y — these cover maybe 60% of what merchants used Scripts for. Before building anything, check if Shopify's native tools already do what your script did. Many merchants installed Scripts years ago to solve problems that Shopify has since solved natively.

Path 2: Find a third-party app. Dozens of apps on the Shopify App Store now use Functions under the hood. If your script handled tiered discounts, payment hiding based on location, or free shipping thresholds, there's likely an app for it. Search the App Store for your specific use case. Read reviews from 2025–2026 — older reviews won't reflect Functions-based updates.

Path 3: Build a custom app with Shopify Functions. If your logic is genuinely unique, you'll need a developer to build a custom app. Shopify's CLI can scaffold a Functions extension in minutes. But writing the logic requires understanding Wasm, the Function API schema, and Shopify's dev tools. Budget 2–4 weeks for a moderately complex script. Simple scripts take closer to 2–3 days.

Migration Step-by-Step: From Script to Working Function

Document every active script. Open Script Editor. For each script, write down: what it does, what conditions trigger it, and what outcome it produces. Screenshot the code if you didn't write it.
Categorize each script. Mark each as "replaceable by native Shopify," "replaceable by app," or "needs custom build."
Handle the native replacements first. Go to Discounts in your Shopify admin and set up automatic discounts for any scripts that native features cover. Test them in a preview checkout.
Install apps for the app-replaceable scripts. Install, configure, and test. Make sure the app produces the same outcome your script did. Pay attention to edge cases — a "10% off for orders over $100" script might have handled cart-level discounts differently than the app does.
Engage a developer for custom builds. Share your documentation from step 1. A good developer will tell you if the Function API supports your use case or if you need a workaround.
Test everything in a development store. Don't test in production. Clone your store or use a dev store. Run through every scenario your scripts handled.
Disable scripts and go live with Functions before June 30. Don't wait until the deadline. Give yourself at least 2 weeks of overlap where both systems are technically active so you can catch issues.

Common Gotchas That Trip Up Merchants

Script stacking. If you run multiple scripts that interact — say, a line item discount script and a shipping script that checks discount amounts — those interactions don't automatically transfer. Functions are isolated. You'll need to verify that your new setup handles the same combinations.

Customer tag-based logic. Scripts commonly used customer tags to apply VIP pricing or wholesale discounts. Functions support customer metafields, but the implementation is different. If your scripts rely heavily on customer tags, map out every tag and its associated logic before migrating.

Payment method hiding. This is one of the most common Scripts use cases — hiding COD for certain regions, or hiding specific gateways below a cart value. Payment customization Functions handle this, but the configuration interface depends on which app you use. Test thoroughly.

The edit freeze catches people off guard. After April 15, you cannot modify existing scripts. If you're planning to run scripts until June 30 while you migrate, make sure they're in their final state before April 15. Any bugs after that date are unfixable.

What Happens If You Do Nothing

On July 1, your Script Editor scripts will stop executing. Shopify won't migrate them for you. Your checkout will behave as if those scripts never existed.

For a store running a "buy 2 get 10% off" script, that means customers pay full price — and your AOV strategy falls apart overnight. For a store hiding COD above $500, that means COD shows up on every order. For a store applying wholesale pricing via customer tags, that means wholesale buyers see retail prices.

None of these scenarios trigger an error message. The checkout will work — it'll just work wrong. And you'll figure it out when customers complain or when your margins look off at the end of the month.

Start this week. Open Script Editor, document what you have, and pick a migration path. The merchants who'll have the smoothest transition are the ones who treat April 15 as the real deadline — not June 30.