Quick answer
Review the combination rules on every participating discount and test the resulting cart. Enabling a combination on one promotion does not guarantee that all discount types or app rules can stack.
Applies to
For the owner or authorized staff of the selected Shopify store, with the permissions needed for this task. Shopify hosts the store separately from a cPanel hosting account. Features and workflows depend on the current Shopify plan, theme and apps.
Before you begin
List the product, order, and shipping discounts you intend to offer together. Check the store's current discount interface, plan features, and any app that supplies a promotion.
What to do
- Open Discounts and inspect the first promotion's Combinations settings. Review the other promotion separately.
- Allow only the combinations intended by the offer. Check eligibility and minimum requirements on each discount rather than considering combination settings alone.
- Review automatic discounts and app discounts that may already apply. Do not assume a crossed-out compare-at price is another checkout discount.
- Test each promotion individually and together using the intended products, customer, market, and purchase option. Review the order of calculations and final total.
Check the result
Confirm that the cart shows the intended savings without an unintended extra reduction. Also test a deliberately ineligible cart to ensure that the offer's limits still apply.
If the problem continues
When Shopify chooses a different eligible combination or an app refuses the combination, save the exact cart and result. Ask support to compare the current platform and app restrictions before adding custom code or a new paid discount app.
Related help
- Find why a Shopify discount code is not working
- Plan a Shopify checkout test without disrupting customers
- Read Shopify order statuses before shipping, refunding, or closing an order
Official Shopify references
Reviewed October 31, 2026. This is an original merchant support guide based on the official references above. Shopify interfaces, rollout availability, permissions, and plan features can change.
