For years, Shopify Scripts was the quiet engine behind the clever checkout logic on Plus stores. Buy three, get one free. Spend $75, shipping is on us. Wholesale tags pay a different price. Most of it ran in a little box called the Script Editor that your shoppers never saw and you mostly forgot about.
That era is ending. Shopify Scripts is going away, and Shopify is moving everyone to Functions. If you have been hearing that Shopify Scripts is deprecated and wondering whether it actually affects you, this guide gives you the plain answer plus a calm, no-drama plan to migrate Shopify Scripts to Functions before anything stops working.
🎯 Quick Summary
- Shopify Scripts and the Script Editor are being retired, and Shopify is moving merchants to Functions. Once they are gone, your scripts stop running.
- If you do nothing, tiered discounts, free shipping rules, gift offers, and payment rules silently fail at checkout.
- The replacement is Shopify Functions, which run on every paid plan, not just Plus.
- TierNova is built entirely on Functions and includes one-click Scripts migration, so you move over with no downtime and no theme edits.
📅 What Is Happening and When
Shopify is retiring the old Script Editor and moving every store to Shopify Functions, its newer, faster customization layer. Shopify Scripts is going away, and once it does your line item, shipping, and payment scripts stop executing. There is no grace period that quietly keeps them alive, and there is no automatic conversion that rewrites them for you.
Why the change? Scripts ran on older infrastructure that only worked on Plus and only inside the classic checkout. Functions run on Shopify's modern, sandboxed engine. They are faster, they work across the whole checkout experience including Shop Pay, and crucially they are available on every paid plan. So while "Shopify Scripts is going away" sounds like bad news, the destination is genuinely better than where you started.
💡 Quick reality check: if you are not on Shopify Plus, you never had Scripts in the first place, so the shutdown does not break anything for you. But it does mean the discount superpowers that were once Plus-only are now open to your plan too.
⚠️ What Actually Breaks
Scripts did three jobs at checkout, and each one has a clear Functions equivalent. Here is what you are actually replacing:
- Line item scripts. Volume and tiered pricing, buy X get Y, percentage or fixed discounts on specific products, and automatic free gifts. These become product and order discounts through the unified Discount Function.
- Shipping scripts. Free shipping over a threshold, discounted rates for certain customers, and rate adjustments. These move to shipping discounts and delivery customizations.
- Payment scripts. Hiding, renaming, or reordering payment methods based on the cart. These become payment customizations.
If you do nothing before the deadline, all of the above stop applying. The painful part is how quiet the failure is. There is no error message and no warning banner for your customers. Your "spend $75 for free shipping" rule simply does not fire, the shopper pays for shipping, and your conversion rate dips for reasons you cannot see in a dashboard. Many of these silent breakages look exactly like the problems we cover in why your Shopify discounts fail at checkout, except this time the cause has a calendar date.
🧭 Your Options for Replacing Scripts
You have three realistic paths. None of them is "wait and see," because the deadline does not move.
Option 1: Rebuild on Functions yourself. If you have a developer, you can write custom Shopify Functions to replicate each script. This gives you full control but it is real engineering work, it needs testing, and you own the maintenance forever. Fine for one simple rule, heavy for a store with a dozen offers.
Option 2: Use Shopify's native discount tools. The built-in admin discounts cover basic cases like a flat percentage off or simple automatic discounts. They are free and reliable, but they stop short of stacked tiers, gift-with-purchase logic, bundle pricing, and wholesale tag pricing. If your scripts were simple, native tools might be enough.
Option 3: Use a Functions-based discount app. This is the path most stores will take, because a good app gives you the power of custom Functions without the custom development. The key is to pick one built natively on Functions (not an app that hacks prices on the cart page), so your discounts apply correctly at checkout and survive future Shopify updates. We break down the wider category in the best Shopify discount and bundle apps in 2026.
🚀 How to Migrate to a Functions App (TierNova One-Click Import)
This is where TierNova comes in. TierNova is a new Shopify app for price policies, quantity and volume discounts, and bundles, built 100% on Shopify's native engine: the unified Discount Function plus Cart Transform. It launches as Shopify Scripts shuts down, and one-click Scripts migration is built in for exactly this moment.
The migration is designed to be boring, in the good way:
1. Install and import. Add TierNova, point it at your existing Scripts, and it reads your line item and shipping discount logic and recreates it as Functions-based offers. No copying rules by hand.
2. Preview and test. Before anything goes live, TierNova's preview and test mode lets you run the imported offers against real cart scenarios so you can confirm the new version behaves like the old one. Its logic and conflict analyzer flags any rules that overlap or fight each other.
3. Switch with no downtime. Functions-based discounts can run alongside your old Scripts, so you flip the new offers on, confirm they match, and only then turn the Scripts off. Shoppers never see a gap.
Because TierNova's storefront UI is 100% theme app blocks, there are no theme edits to make and nothing to clean up later. And because it runs on Functions, your discounts apply natively in the cart, at checkout, in Shop Pay, and on express checkouts like Apple Pay, Google Pay, and PayPal, since they are automatic discounts and not codes.
Your migration in four steps
Import
One-click pull of your line item and shipping Scripts into Functions-based offers. No manual re-entry.
Preview
Test the new offers against real cart scenarios. The conflict analyzer catches overlaps before launch.
Run side by side
New Functions run next to old Scripts. Confirm the numbers match with zero downtime.
Switch off
Turn off the old Scripts. Your offers are now future-proof on every plan.
Move off Scripts the easy way.
TierNova imports your Shopify Scripts, rebuilds them on Functions, and keeps every discount applying at checkout. On any paid plan.
⚡ Why Functions Beat Scripts
Migrating is not just damage control. Functions are a real upgrade, and once you are on them you stop worrying about checkout logic breaking. Here is the side-by-side.
| Capability | Shopify Scripts (old) | Shopify Functions (TierNova) |
|---|---|---|
| Available plans | Plus only | Every paid plan |
| Status after Scripts retires | Stops working | Fully supported |
| Applies in Shop Pay and express checkouts | Partial | Yes, natively |
| Volume and tiered pricing | Code required | Yes, from a wizard |
| Bundles without fake products | No | Yes (Cart Transform) |
| Wholesale / B2B tag pricing | Plus only | Yes, all plans |
| One-click Scripts import | N/A | Yes, built in |
| Preview and conflict analyzer | No | Yes |
| Theme edits needed | Sometimes | None (app blocks) |
A few upgrades are worth calling out. Functions apply your discount off the current or sale price (never the original), they recalculate the cart correctly when a trigger item is removed, and they consolidate many offers into a few Functions so you stay within Shopify's cap on active automatic discounts. You also pick up things Scripts never did well, like clean multi-product bundles without duplicate variants, which we cover in Shopify product bundles without fake products.
The headline win for non-Plus stores is wholesale. Tag-based B2B pricing used to require Plus and a Script. With a Functions app it works on every plan and co-exists with your automatic discounts and codes, as we explain in Shopify wholesale and B2B pricing without Plus.
If your Scripts were genuinely complex, or you simply want someone to handle the whole move for you, the CartWorks services page outlines how a full migration engagement works. Either way, the one thing not to do is wait until the last minute and discover your promotions went dark.
