Your Shopify checkout handles revenue, tracking, and customer trust in one place. A few quiet code changes can break discounts, pixels, or shipping rules overnight. This guide walks through the checkout.liquid sunset 2026 timeline and the exact fixes that protect your store.
What is the checkout.liquid Sunset Means for Your Store
Two Shopify changes sit behind one headline, and owners often confuse them. Sorting the dates helps you plan the right fix.
Short answer: checkout.liquid is deprecated and replaced by Shopify Checkout Extensibility. The June 30, 2026, date applies mainly to Shopify Scripts, not to checkout.liquid itself. Stores using Scripts for discounts or shipping must switch to Shopify Functions or supported apps.
The checkout.liquid sunset 2026 topic covers both shifts. Stores with heavy custom code need Shopify Plus development support before the cutoffs arrive.
How the Checkout Timeline Fits Together
Three Shopify deadlines hide behind one topic, and each affects a different checkout area. Knowing which date drives which change keeps your migration focused.
You can confirm each window in Shopify’s checkout.liquid documentation, which lists the official dates.
checkout.liquid Deprecation and the Core Checkout Steps
checkout.liquid is now unsupported for the Information, Shipping, and Payment checkout steps. Shopify Plus merchants now build changes through apps, blocks, and APIs, not theme code.
Thank You and Order Status Page Changes on August 28, 2025
checkout.liquid, additional scripts, and script tags reached their sunset for the Thank You and Order Status pages on August 28, 2025. Tracking and post-purchase code stopped rendering, so stores moved it to Web Pixels and checkout extensions.
Shopify Scripts Sunset on June 30, 2026
Shopify Scripts will keep working alongside checkout extensions until June 30, 2026. After that, discount, shipping, and payment Scripts must move to Shopify Functions or supported apps. This date drives most of the checkout.liquid sunset 2026 concern for Plus merchants.
What Breaks When checkout.liquid Goes Away?
Legacy checkout code touches more parts of your store than teams expect. The table below maps each common risk to a clear fix.
| Area | What May Break | Why It Breaks | How to Fix It |
|---|---|---|---|
| Discount logic | Tiered or customer-based discounts stop applying | Built-in Shopify Scripts retiring June 30, 2026 | Rebuild with discount Functions |
| Shipping rules | Custom rates or hidden methods fail | Script-based shipping logic loses support | Move to delivery Functions |
| Payment method rules | Hidden or reordered payment options reset | Payment Scripts no longer run | Recreate with payment Functions |
| Checkout UI changes | Custom fields, banners, or layout edits vanish | checkout.liquid no longer renders them | Rebuild with Checkout UI Extensions |
| Custom fields | Gift notes or delivery instructions disappear | Theme level field code stops working | Add via checkout extensions |
| Tracking pixels | Conversion data goes missing | Additional Scripts retired at checkout | Set up Web Pixels in Customer Events |
| Thank You page scripts | Upsell or survey code stops loading | Sunset on August 28, 2025 | Move to post-purchase extensions |
| Order Status page scripts | Order tracking widgets break | Same August 28, 2025 sunset | Rebuild with order status extensions |
| Post purchase scripts | Upsell offers fail to show | Legacy injection method removed | Use post purchase UI Extensions |
| Third party app conflicts | Apps using script tags stop working | Script tag support removed | Update apps to extensibility ready versions |
Your score gives you a planning estimate, not a confirmed number. The bands assume you know every customization and app touching your checkout, and most stores carry a few they have forgotten about. A structured Shopify checkout audit shows which risks already affect your live store, so you can turn these rough ranges into a firm scope and an accurate quote.
How Much Will the Checkout Migration Cost You?
Checkout migration cost depends on how much custom logic sits inside your checkout. Most stores land between $500 and $15,000 for the build, and the calculator below helps you size your range before you request quotes.
Rate Each Area as Low, Medium, or High
Score each item below for your store. More High marks mean more dev time, testing, and budget.
- Number of checkout customizations
- Number of third party checkout apps
- Discount and shipping rule complexity
- Tracking and analytics setup
- B2B or wholesale checkout logic
- Agency white-label support need
- Testing and QA depth
Reading Your Score
Mostly Low ($500 to $3,000): A checkout audit plus minor cleanup, such as custom Liquid sections or simple script fixes.
Mostly Medium ($3,000 to $15,000): A structured Checkout Extensibility migration with one or two Checkout UI Extensions and rebuilt discount rules.
Mostly High ($15,000 to $40,000+): A custom migration with multiple Shopify Functions, B2B logic, and full agency support.
Shopify Plus itself starts at $2,300 per month, separate from build cost. Treat these bands as planning ranges, not fixed quotes.
Treat these bands as a rough planning guide, not fixed pricing. Complex wholesale builds often need full Shopify development services to rebuild rules safely.
What Should Merchants and Agencies Check First?
Checkout risk looks different depending on who owns the store. Both merchants and agencies need a clear plan before June 30, 2026.
How Merchants Can Protect Revenue and Tracking
Merchants should map every discount, pixel, and shipping rule at checkout. Rebuilding these early keeps sales data and promotions stable through checkout.liquid sunset 2026 window. Teams without in-house developers can hire Shopify developer support to handle the rebuild.
How Agencies Can Use White-Label Checkout Migration Support
Agencies can pass technical checkout work to a specialist partner. White-label support covers audits, Shopify Functions builds, app-based checkout changes, and full QA. Stores running many connected tools may also need Shopify integration services to keep data flowing after migration.
Your Checkout Risk Checklist Before the Deadline
A checklist keeps your migration focused on what protects revenue. Flag anything still running on legacy code as urgent.
Run these checks on every Plus store you manage. Each item points to a common failure area that surfaces after the checkout.liquid sunset 2026 changes take effect.
- Confirm checkout runs on Checkout Extensibility, not frozen Maintenance mode
- List every Shopify Script used for discounts, shipping, and payments
- Audit Additional Scripts and script tags are still in place
- Verify Web Pixels capture all conversion and purchase events
- Test custom fields, banners, and checkout UI elements
- Check third-party apps for extensibility-ready versions
- Plan staging tests for each rebuilt rule before launch
Stores wanting a guided rollout can request checkout migration support from a specialist Shopify team.
How CartCoders Supports Your Checkout Extensibility Migration
CartCoders helps merchants and agencies move off legacy checkout code without losing sales or tracking. The team handles checkout audits, Checkout Extensibility migration, Shopify Functions planning, white-label support, and checkout QA.
A focused Checkout Health Check shows exactly what needs attention on your store before June 30, 2026. CartCoders reviews your current checkout customizations, additional scripts, and tracking setup, then maps each item to its replacement under Checkout Extensibility. Our team migrates Shopify Scripts to Shopify Functions, rebuilds your discount and shipping rules, and moves custom fields and upsells into Checkout UI Extensions.
We also rebuild your pixels and analytics events so conversion data keeps flowing after the cutover, and we run full checkout testing before launch so live orders stay safe. For agencies, we deliver the same work under white-label support, so you keep the client relationship while we handle the migration. Book a Checkout Health Check with CartCoders to size the work and protect revenue before the deadline.
Final Thoughts Before the Deadline
The checkout.liquid sunset 2026 shift rewards stores that plan early and test often. Moving discounts, tracking, and shipping logic now keeps revenue steady and avoids a costly scramble. The stores that struggle after the deadline are the ones that wait until checkout breaks before they act. By then, broken pixels have already lost sales data, and rushed fixes carry more risk on live orders.
Start with a clear picture of everything your checkout does. List every customization, script, and app, then match each one to its supported replacement under Checkout Extensibility. Rebuild your tracking, test each step with real orders, and confirm that discounts and shipping still apply correctly. A store that finishes this work early keeps its conversion data intact and its checkout stable through the change.
Treat the deadline as a planning date, not a panic date. Stores that move now cross June 30, 2026 without losing a single order, while late movers spend the summer fixing problems they could have prevented.
Frequently Asked Questions
These quick answers cover the questions merchants and agencies ask most about the change. Each one stays short and practical for fast reference.
It describes Shopify is retiring legacy checkout code. checkout.liquid lost support for the core checkout steps, and Shopify Scripts retire on June 30, 2026. Stores must move that logic to the Checkout Extensibility tools to keep checkout working.
Yes, for the Information, Shipping, and Payment steps, it is already unsupported. checkout.liquid, additional scripts, and script tags also reached their sunset for the Thank You and Order Status pages on August 28, 2025.
Shopify Scripts stop working after June 30, 2026. Any discount, shipping, or payment logic built in Scripts must move to Shopify Functions or supported apps. Stores skipping this step risk broken pricing and checkout rules.
Shopify Checkout Extensibility replaces it. Merchants now use Checkout UI Extensions, Shopify Functions, Web Pixels, and the Branding API. These tools handle layout, logic, and tracking through apps and APIs instead of editing theme code directly.
Yes. Agencies can partner with a technical team for white-label audits, Shopify Functions builds, app based checkout changes, and QA. This keeps client delivery on schedule while the partner handles the heavy checkout migration work.
A Checkout Health Check finds broken scripts, missing pixels, and at risk rules before they cost sales. It gives merchants a clear fix list and helps agencies scope client work ahead of the deadline.
