TL;DR: Shopify Scripts stop executing on June 30, 2026, but the real risk isn’t the deadline alone. Many Plus stores have checkout logic buried inside old Scripts: discounts, payment rules, shipping restrictions, B2B terms, product exclusions, and exceptions nobody has reviewed in years. Rather than migrate the Script blindly, audit the checkout decision first, then decide whether the rule belongs in native Shopify features, an app, or a custom Shopify Function.
In many Shopify Plus stores, Scripts became a lifesaver. From discounts that applied correctly to shipping rules that protected the operations team from orders they could not fulfill the usual way, Scripts held together checkout decisions Shopify could not handle cleanly at the time. They did the work in the background, so nobody had to think about them every day.
The problem is that useful Scripts often became invisible.
Shopify announced that on June 30, 2026, Shopify Scripts will stop executing. The first cutoff has already passed: as of April 15, 2026, merchants can no longer edit existing Scripts or publish new ones. That creates a real problem for stores that still depend on them, especially if the current team no longer remembers who wrote the Script, why certain exceptions exist, or whether the logic is documented anywhere outside Script Editor.
From here, the mistake is choosing the replacement too early. Merchants have a few different paths forward, including native Shopify features, App Store tools, and custom Shopify Functions. The right path depends on understanding what each Script actually controls before anything is replaced.
Which Checkout Rules Can Break When Scripts Stop Running?
When Scripts stop executing, the storefront does not necessarily break in an obvious way. Checkout may still load, customers may still place orders, and the admin may still look normal. The problem is that checkout can accept orders while the business rules behind it stop applying.
Discount Rules
Discounts are usually the first place merchants look, and for good reason. Many Scripts were used to control wholesale pricing, volume discounts, BOGO rules, product exclusions, and promotion stacking. If that logic is still tied to Scripts, it needs to be reviewed before June 30.
Shipping Rules
Shipping can create a different kind of problem. A Script may hide rates, adjust shipping costs, block certain fulfillment paths, or prevent specific products from being offered with the wrong carrier. When that rule disappears, the customer may still be able to check out, but with a shipping option your operations team cannot support.
Payment Filtering
Payment filtering is especially important for B2B stores. Invoice payment, cash on delivery, wire transfer, or other methods may appear only after the Script checks customer status, account type, order value, or approval rules. If that logic is missing, the wrong buyer can see the wrong payment option.
Validation and Exceptions
Some checkout rules sit outside the obvious discount, shipping, or payment categories. A Script may stop a restricted product from being purchased, validate a product combination, or apply an exception for a specific customer group. These rules are easy to miss because they do not always appear as a visible promotion or checkout setting.
Why an App Can Recreate the Behavior and Still Miss the Rule
The dangerous part is that an app can match the category of the Script without matching the business rule behind it.
Take invoice payment as an example. A Script may not simply show or hide the option. It may be checking the customer’s approval status, order size, location, account type, and product mix before deciding whether that payment method should appear. If the app only hides invoice payment for one customer tag, it has replaced the surface behavior, not the checkout decision.
Discounts have the same problem. “15% off wholesale orders” sounds simple until the Script is also excluding low-margin SKUs, blocking stacked promotions, or applying the discount only after a certain cart threshold. The discount is the visible part. The protection around the discount is what often matters.
So the question isn’t whether an app can create the same kind of discount, shipping rule, or payment filter. The question is whether it can read the same inputs, enforce the same exceptions, and produce the same checkout behavior under real buying conditions.
If it can, the app may be enough. If it cannot, the Script needs a different migration path. Some rules may now fit inside native Shopify features. Others need to be rebuilt as custom Shopify Functions, especially when the logic is specific to how the business sells, approves orders, ships products, or protects margin.
How to Audit a Shopify Script Before Replacing It
Before choosing a replacement, document the checkout decision the Script is making. The Script name may tell you the category, but it won’t always tell you the business reason behind the logic. A Script called “Wholesale Discount” may also include product exclusions, customer rules, cart thresholds, or promotion limits that aren’t obvious from the name.
Start with Shopify’s customizations report so you have a full list of active Scripts. Then review each Script against the checkout behavior it controls: what changes, who is affected, which conditions are checked, and which exception the Script is protecting.
Pay close attention to Scripts that were written years ago to solve a very specific issue: a margin problem, a fulfillment limitation, a payment approval process, or a B2B account rule. If that reason is not documented, the migration can technically work and still produce the wrong outcome.
Once this audit is done, the migration path becomes easier to choose. Simple rules may fit native Shopify features or an app. Rules tied to pricing logic, approvals, B2B accounts, shipping restrictions, ERP data, or margin protection usually need deeper planning and platform migration best practices before they are rebuilt or replaced.
How to Choose the Right Shopify Scripts Migration Path
After you understand what each Script controls, the replacement path becomes easier to choose. The decision should come from the rule itself: how simple it is, how many conditions it checks, and how much business risk sits behind it.
Native Shopify for Rules the Platform Now Handles
Some Scripts can move back into Shopify’s native settings. This is the cleanest option when Shopify now supports the rule directly.
This usually fits straightforward logic: basic discounts, simple shipping settings, standard checkout configurations, or rules that no longer need custom handling. If Shopify can support the rule without custom code, there is no reason to rebuild it as a Function.
Apps for Common Rules with Clear Boundaries
Apps make sense when the Script follows a common pattern and the app can support the full rule. A BOGO promotion, volume discount, tiered discount, free shipping rule, or basic payment visibility rule may fit here.
The test isn’t whether the app can recreate the main behavior. The test is whether it handles the same exceptions. If the app recreates the discount but misses the SKU exclusion, customer segment, cart threshold, or payment condition, the migration is incomplete.
Custom Functions for Business-Specific Checkout Logic
Custom Shopify Functions are for Scripts that carry rules tied to how the company prices, approves, ships, validates, or protects margin.
This usually includes customer-specific pricing, B2B payment terms and invoice logic, account status, product restrictions, shipping limitations, cart validation, ERP data, or multi-condition discount rules.
If the Script is making a checkout decision that native Shopify or an app can’t fully reproduce, it should be scoped as custom Shopify Functions development instead of forced into a weaker replacement.
Why B2B and Wholesale Need More Attention
B2B and wholesale stores, especially those with industrial B2B checkout customization, use Scripts for more than promotions. In many cases, Scripts help checkout reflect agreements that already exist outside Shopify: negotiated pricing, payment terms, account approvals, automated credit management, product restrictions, and fulfillment rules.
That makes a Script migration more than a checkout update. A retail discount issue can create a bad promotion or an unexpected coupon result. In B2B, missing checkout logic can affect whether the right buyer sees invoice payment, receives the correct price tier, orders restricted products, or moves through a fulfillment path the operations team can’t support.
The buyer doesn’t care that Shopify changed the underlying architecture. They only see whether checkout still honors the terms they expect. If the Script enforces account-specific rules, the replacement has to preserve those rules with the same precision.
For B2B stores, the migration has to protect the commercial relationship behind the checkout. A replacement can’t stop at applying a discount or hiding a payment method. It needs to preserve who is allowed to buy, what price they receive, which payment terms apply, and which orders the business can safely fulfill. That logic needs to be documented and tested before it moves into native Shopify, an app, or a custom Function.
Why Waiting Shrinks the Discovery Window
The closer the deadline gets, the less space there is for discovery. Building the replacement is only one part of the project. The harder work is understanding what the old Script was doing, why it was written that way, and which edge cases still need to survive in the new setup.
Waiting too long doesn’t make the migration impossible, but it makes the project narrower. There is less time to audit the Script, map the business rule, choose the right replacement, and test the logic against real buying conditions. That is when quiet rules get missed, especially the ones tied to old exceptions, undocumented approvals, or fulfillment limits nobody has reviewed in years.
Stores preparing for Q4 2026 should be especially careful. You don’t want to find missing checkout logic while the team is already working through promotions, inventory planning, fulfillment capacity, and holiday campaigns.
The practical move is to start with an audit now. You don’t need to rebuild everything at once, and not every Script needs a custom Function. You need to know which Scripts still matter, which ones can move into native Shopify or an app, and which ones need custom logic before the deadline gets too close.
If your Shopify Plus store still relies on Scripts for discounts, shipping rules, payment filtering, B2B checkout behavior, or validation logic, contact us. Optimum7 can audit your current Scripts, document the checkout rules behind them, identify which logic can move to native Shopify features or apps, and scope custom Shopify Functions for rules that need a deeper rebuild.
Frequently Asked Questions
When do Shopify Scripts stop working?
Shopify Scripts stop executing on June 30, 2026. Shopify has already passed the first cutoff: as of April 15, 2026, merchants can no longer edit existing Scripts or publish new ones.
What happens if I don’t migrate Shopify Scripts before the deadline?
Any checkout behavior still tied to Scripts will stop applying. That can affect discounts, shipping rules, payment filtering, product restrictions, B2B checkout behavior, and other custom logic your store depends on.
Can I replace Shopify Scripts with an app?
Sometimes. An app may work if the Script follows a common pattern, such as a basic discount, free shipping rule, volume discount, or simple payment visibility rule. The risk is that an app can recreate the visible behavior while missing the conditions behind the rule. Before relying on an app, test whether it supports the same customer rules, product exclusions, cart thresholds, payment conditions, and exceptions.
Do all Shopify Scripts need custom Shopify Functions?
No. Some Scripts can move into native Shopify features. Some can be replaced with App Store tools. Custom Shopify Functions are usually needed when the Script carries business-specific checkout logic, such as customer-specific pricing, B2B payment terms, account status, product restrictions, cart validation, ERP data, or multi-condition rules.
How do I know which migration path is right?
Start with an audit. Document what each Script changes at checkout, which customers or products it affects, which conditions it checks, and what exception it was built to protect. Once the rule is clear, it becomes easier to decide whether it belongs in native Shopify, an app, or a custom Shopify Function.
Why are B2B and wholesale stores more exposed?
B2B and wholesale stores often use Scripts to protect commercial rules that exist outside Shopify, including negotiated pricing, payment terms, account approvals, product restrictions, and fulfillment limits. If that logic disappears, checkout may still load, but the buyer may no longer see the price, payment method, or ordering rules they expect.
Can Shopify Scripts and Shopify Functions run at the same time?
During migration, some stores may need to test new logic while existing checkout behavior is still being reviewed. The important part is validation. Don’t assume the new setup works because one test order passes. Test real customer groups, product combinations, cart values, shipping destinations, and payment methods.
Do I need a developer to migrate Shopify Scripts?
For simple replacements, maybe not. Native Shopify features or apps may cover basic rules. For Scripts tied to B2B logic, customer-specific pricing, payment terms, ERP data, product validation, shipping restrictions, or multi-condition checkout behavior, developer support is usually needed because Shopify Functions require a proper build and testing process.
When should I start auditing my Shopify Scripts?
Start now, especially if you are planning Q4 2026 promotions or B2B checkout updates. The audit takes time because old Scripts may contain business context that isn’t written down anywhere: exceptions, approvals, fulfillment limits, customer rules, or edge cases from years ago. Waiting until the deadline is closer leaves less room to find those rules before they need to be rebuilt or replaced.
About the author: Duran Inci is the CEO and Co-Founder of Optimum7, an ecommerce development and digital marketing agency. He helps mid-market and enterprise brands scale revenue through conversion optimization, SEO, and custom ecommerce solutions.
