Find the effective value of a gift card bought at a discount.
A discounted gift card only saves money on the balance you spend. Unused remainders are a silent loss, so the honest discount compares the price paid against the value you will genuinely use rather than the face value printed on the card. Small stranded balances erode a headline discount quickly, which is why the two percentages here usually differ.
Effective gift card discount
Usable value = face value x usage share/100; real discount = (usable value - price paid) / usable value x 100
Because leftover balances are money spent and not used. A card bought at 12% off but only 90% spent nets closer to 2%.
Use the card on a purchase that exceeds the balance and pay the difference by another method — that spends the card down to zero in one transaction.
Resale marketplaces carry fraud and expiry risk, and retailer insolvency can void balances entirely. Treat deep discounts on unknown platforms with caution.