Coupons, Cashback & Discount Stacking
Coupons and cashback are the layer you apply after you've found the lowest base price — never instead of it. Stacked correctly they shave a real extra slice; chased blindly they trick you into the wrong store.
Base price first, discounts second
The classic trap: a store offers 20% off and big cashback, so you buy there — without noticing its base price was 30% higher than a competitor. Always settle the lowest landed cost first, then see which discounts apply to that winner. A discount only counts if it lands on an already-competitive price.
How stacking actually works
Stacking is combining compatible discounts on one purchase: a store coupon + a cashback portal + a card reward, for example. Compatibility varies — some coupons block cashback, some cards exclude gift-card buys. Read the terms once per store and you'll know its stack for next time. Order matters too: percentage-off usually applies before fixed-dollar codes.
Cashback without the catch
Cashback portals pay you a slice back for clicking through before you buy. It's free money if the portal's store also had the best base price. Don't let a cashback rate pull you to a pricier store — calculate price minus cashback and compare that to the cheapest plain price. Watch for minimums, payout delays, and categories excluded from cashback.