Discount Stacking

Discount stacking occurs when two or more promotional mechanisms apply to the same order simultaneously, creating a compound discount that was never modeled or approved. A common scenario: a customer applies a 15% welcome coupon on top of a 20% seasonal sale, then qualifies for free shipping via a loyalty threshold, turning a profitable order into a loss. Most commerce platforms lack cross-promotion awareness, meaning each discount engine operates independently without visibility into what other reductions have already been applied. For mid-market merchants running multiple concurrent campaigns, stacking tends to spike during peak promotional periods. Shopify's discount combination settings decide inside checkout which discounts may combine; Agentis works after the order is placed, checking each order's cumulative discount depth against the profit floor within 60 seconds and flagging or holding before fulfillment the orders where combined reductions push margin below acceptable thresholds.