Coupon Stacking Calculator

It applies the percentage coupon first (Coupon 1), then the dollar-off coupon (Coupon 2) on the result, then calculates sales tax on that post-coupon price, and finally subtracts the cashback rebate from the tax-inclusive total. This mirrors how most retailers actually stack markdowns at checkout — percentage discounts before flat dollar-off coupons — though your specific store's policy could apply them in a different order.

Sales tax is a point-of-sale calculation the merchant applies to the price after any in-store coupons are deducted, so it's based on After $ Coupon rather than the final price. Cashback, by contrast, is typically a separate rebate paid back to you afterward by a credit card issuer or shopping app — it reduces what you effectively paid, but it isn't recognized by the merchant when calculating the tax you owe at checkout.

No — this calculator floors After $ Coupon at $0 if the dollar-off coupon exceeds the remaining price after the percentage coupon, since retailers don't issue a refund beyond the item's price. If your dollar-off coupon is larger than the discounted price, the result will simply show $0 rather than a negative figure.

Effective Discount is Total Saved (Original Price minus your final net price after cashback) expressed as a percentage of the Original Price, so it captures the combined impact of all four discount types in one figure. It will typically be higher than any single coupon's stated percentage, since percentage coupons, dollar-off coupons, and cashback compound rather than simply adding together.

Not exactly — a coupon reduces the price you pay at checkout, while cashback is usually paid back to you afterward by a credit card rewards program or a cashback shopping app, meaning you still pay the full post-coupon, post-tax price upfront and only recoup the cashback later. This calculator treats it as reducing your net final cost for comparison purposes, but be aware the actual cash-back credit may not arrive for days or weeks.