3 articles tagged with discount-stacking
How Shopify decides which discounts combine, and how to control what stacks with what.
You can run buy-one-get-the-second-50%-off natively in Shopify with Buy X Get Y. Here is the setup, the 'skip the first quantity' mechanic, and where native quietly breaks.
For years Shopify applied only one product discount per line item. A 2026 platform change lifts that limit with a two-way tag match. Here is what changed, who qualifies, and how to combine product discounts correctly.
Shopify only applies your single highest discount by default. Here is how to stack discounts across product, order, and shipping classes so totals match at checkout.
How Shopify decides which discounts combine, and how to control what stacks with what.
Stacking is governed by combinesWith rules on each discount plus the order Shopify applies them. Two discounts that both look eligible may not both apply. These posts cover how to reason about it, how to test it, and where the cart and checkout can disagree if you get it wrong.
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