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, discount stacking can affect 5–12% of orders during peak promotional periods. Agentis detects stacking events at checkout by evaluating the cumulative discount depth against the profit floor, blocking or flagging orders where combined reductions push margins below acceptable thresholds.