June 30, 2026: Shopify Scripts End - What Breaks, Who's At Risk, and How to De-Risk the Cutover

The date is real, and the behavior is simple

On June 30, 2026, Shopify Scripts will be removed and will no longer work. If your store relies on Scripts for checkout logic, that logic stops executing after that date.

Shopify extended the deprecation timeline once — from August 28, 2025 to June 30, 2026 — and positioned that extension as the final runway while Shopify Functions matures for discounts, shipping, and payments.

This article is not here to alarm you. It is here to make sure you do not discover missing checkout behavior under pressure.

Who this impacts

Shopify Scripts and the Script Editor app are Shopify Plus-only.

So the direct risk group is:

• Shopify Plus stores currently running Scripts
• Plus stores that used Scripts historically (and may still have quiet logic you forgot existed)
• Teams with layered promo tooling (Scripts plus discount apps, shipping logic, and payment rules)

Also note: Shopify states the Script Editor app is no longer available for download from the Shopify App Store.

That matters because "we will just create a new Script later" is no longer a reliable plan.

What Shopify Scripts actually do (and what can break)

Shopify Scripts are small pieces of code used to create custom behaviors in cart and at checkout — commonly around:

• Discount logic (line-item discounts, bundles, thresholds, exclusions)
• Shipping rules (rates, eligibility, conditional logic)
• Payment rules (method availability, conditional restrictions)

Shopify groups migration use cases around payment, shipping, and line item scripts.

When Scripts stop, the break is usually not "checkout crashes."

It is subtler and more dangerous:

• discounts apply when they should not (or do not apply when they should)
• shipping options appear that you used to hide or modify
• payment methods become available where you previously blocked them
• edge-case carts slip through because a guardrail was quietly enforced by Script logic

That is exactly why this needs a controlled cutover, not a midnight scramble.

The safest way to think about this cutover

Treat June 30, 2026 as a control-system removal date, not a technical deprecation.

You are not migrating code. You are migrating business policy.

So the goal is:

1. Identify the policy your Scripts enforce
2. Replace that policy with an equivalent (or intentionally revised) mechanism
3. Prove equivalence with testing and observable outcomes

Step 1 — Inventory your Scripts using Shopify's report

Shopify tells merchants to start with the Shopify Scripts customizations report and to complete migration steps before June 30, 2026.

Shopify has also announced an AI-powered "Scripts customizations report" intended to accelerate migration by recommending either building custom apps or installing compatible apps.

Output you want from this step (be strict)

For each Script, write a one-page policy card:

• Name: what you call it internally
• Surface: discount / shipping / payment
• Trigger: when does it apply?
• Scope: which products, customers, markets?
• Constraint: what it forbids, enforces, or adjusts
• Exceptions: what it allows in special cases
• Business owner: who wants this rule (Ops, Finance, Growth)?
• Risk if missing: what happens if it disappears?

If you cannot explain a Script in plain language, you are not ready to migrate it.

Step 2 — Decide what you will not migrate

Many teams discover "museum Scripts":

• logic for campaigns that no longer exist
• rules for shipping markets you do not serve anymore
• one-off constraints from 2021 that never got removed

The fastest risk reduction you can buy is to delete what you do not need — but only after confirming it is truly obsolete.

Step 3 — Choose a replacement path for each Script

Shopify's official position is to transition from Scripts to Shopify Functions, which are distributed as apps and do not require merchants to interact with code directly in the same way as Scripts did.

In practice you have two paths:

Path A: Install a Functions-based app

• fastest to deploy
• vendor owns maintenance
• best for common patterns (discount caps, bundles, shipping rules, payment rules)

Path B: Build a custom Function (via an app)

• best for unique logic
• requires a development team and a testing discipline
• you own ongoing maintenance

Most Plus teams use a mix: apps for commodity rules, custom for differentiators.

Step 4 — Run a controlled parallel period and test what matters

Your highest risk is not "does it compile."

Your highest risk is "does it behave identically under real promo traffic."

What to test (minimum)

• promo stacking and exclusions
• free shipping interactions
• low-AOV edge cases
• market-specific rules
• customer segment rules
• refund and return behavior (if your logic changes what customers pay)

What to measure during the test window

• number of checkouts that would have been blocked or adjusted (old vs new)
• discount totals and rate distributions
• shipping method selection distributions
• payment method selection distributions

If you cannot measure the outcome, you are guessing.

Step 5 — Cut over deliberately (not at the edge of chaos)

A sober migration schedule:

• complete discovery early
• implement replacements
• prove behavior
• cut over in a quiet window
• monitor for two weeks
• keep rollback options where possible

Shopify's messaging is consistent: do not wait — migration steps should be completed before June 30, 2026.

The avoid-pain checklist (copy and paste for your team)

Where CartMoat fits (if margin leakage is one of your Script jobs)

Some Plus stores used Scripts as guardrails against combinations that quietly destroy contribution margin — discount stacking, shipping choices, payment fees, and small carts that go negative.

CartMoat exists for one job: enforce a configurable contribution-margin floor at checkout across discounts, shipping, and payment, with clear shopper messaging and finance-grade audit trails. If you currently approximate that via Scripts, this is the moment to replace it with an explicit policy engine.

Closing: treat this like a finance migration, not a dev task

June 30, 2026 is not a Shopify update.

It is a removal of enforcement for any policy living in Scripts.

If your Scripts encode rules that protect margin, prevent abuse, or control checkout choices, the cost of getting this wrong is paid in silent leakage, not dramatic failure.

Do the inventory. Rewrite the policies. Prove the behavior. Cut over calmly.

And then you can stop thinking about Scripts entirely.