What happens to Shopify Scripts after June 30, 2026?
Shopify Scripts stop executing on June 30, 2026. After that date, any checkout logic running through Scripts, custom discounts, shipping rules, line item modifications, will stop working without replacement. The April 15, 2026 edit cutoff means changes to existing Scripts are no longer possible before that date. If your store uses Scripts for checkout logic, the window to migrate is open now.
Book a Diagnostic Audit →What Shopify checkout features stop working after June 30, 2026?
Shopify Scripts is a Ruby-based execution layer that runs custom logic at checkout. On June 30, 2026, Shopify deactivates the Scripts runtime entirely. There is no graceful degradation. The logic simply doesn't run. The question isn't whether your checkout breaks. It's which piece of it breaks and how visibly.
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Custom discount logic
Percentage-off, fixed-amount, and buy-X-get-Y discounts built in Scripts stop executing. Storefront prices revert to Shopify's default pricing. The discounted price simply doesn't apply.
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Volume / tiered pricing
Quantity-based pricing (e.g. '10+ units at 15% off') built on Scripts stops working. Customers pay standard price regardless of quantity. If this is customer-facing copy on your product pages, it becomes a false promise.
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Customer-specific pricing
B2B or wholesale pricing that uses customer tags to apply Scripts-based discounts stops executing. All tagged customers revert to retail pricing at checkout.
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Checkout bundling rules
Multi-product bundle discounts, free gift logic, and spend-threshold rewards built via Scripts stop executing. Applications fall through to no discount at checkout.
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Shipping rate modifications
Custom shipping rate logic, free shipping thresholds, rate blending, carrier overrides, built in Scripts stops executing. Customers see unmodified carrier rates.
If any of the above applies to your store and you don't have a migration plan, your checkout breaks at the deadline. The fix isn't complicated, but it takes time to do correctly, and that window is closing.
Do all Shopify Scripts need to be replaced with Shopify Functions?
Before writing a single line of Functions code, I triage every Script in your store. A lot of them can be replaced by Shopify's own native Automatic Discounts, Quantity Rules, or Catalogs features, no development required. Identifying those first reduces the scope and cost of the migration before any pricing conversation happens.
Every Script gets assigned one of three outcomes: native replace, Functions build, or remove. That triage report is the first deliverable of a Scripts Audit, and it's what determines whether your migration is a $295 self-serve project or a $2,500+ engineering engagement.
Many Scripts can be replaced entirely by Shopify's own Automatic Discounts, Quantity Rules, or B2B Catalogs features, no development required. If your Script falls into this category, I document the native configuration and you implement it directly in the Shopify admin. No Functions code needed.
Scripts with logic that has no native equivalent, complex tiering, multi-condition rules, cross-product interactions, require a Checkout Functions rebuild in Rust/WASM. This is where the technical migration work happens. Scoped, tested, and deployed through a Custom App.
Some Scripts are ghost code. They were installed for a campaign or test years ago and are no longer used. The triage identifies these. Removing dead Scripts reduces checkout complexity with zero rebuild work.
The deadline is fixed. Your migration timeline isn't yet.
If you're not sure which path fits your store, start with the Playbook. The triage framework in Chapter 2 tells you exactly what you're dealing with. If the audit confirms you need the done-for-you migration, 100% of the Playbook price is credited toward the Diagnostic Audit, so it's not a sunk cost.