Custom pricing rules are business requirements, not just a code migration. Write down the intended behaviour before choosing a Function or app to implement it.
Confirm the existing replacement
Shopify Scripts were deprecated on 30 June 2026 and published Scripts no longer work. Check the actual discount, delivery and payment behaviour the store now relies on. Shopify Scripts notice.
Build a rule inventory
- Which buyers or products qualify?
- Which quantity, price, delivery or payment conditions apply?
- How do rules interact with other discounts and customer arrangements?
- What should happen when information is missing or a provider fails?
- Who owns and approves future changes?
Use representative examples with clearly labelled sample data. A hypothetical discount scenario is not evidence of a client implementation or a result.
Verify the supported capability
Functions implement supported commerce logic; their APIs, limits and availability differ. Check the specific current API and app arrangement instead of assuming one runtime limit or plan rule applies to every case.
Shopify supports network access for certain eligible Functions arrangements with enablement and restrictions. Confirm it for the exact requirement, including how the implementation handles failure. Functions network-access guidance.
Test the combined journey
Use an authorised test environment. Include eligible and ineligible buyers, representative carts, competing discounts, delivery destinations and operations handoff. Check the displayed explanation separately from the implemented business rule.
The store owner approves a live pricing or checkout change. Agree release, monitoring and rollback responsibilities before implementation, rather than presenting an article as permission to change the store.
Scope ongoing ownership
Record the supported version, provider, rules, owner and review triggers. A migration does not guarantee conversion uplift or self-healing pricing. Obtain a quote against this scope rather than a universal investment band.
Explore Shopify development and the checkout migration review with the rule inventory.
Sources and review
Guidance checked on 7 October 2026. Features and commercial terms can change; confirm availability for your own account and scope. These planning checks are recommendations and do not replace an assessment of the actual implementation.