The gift card guide / A 20% off gift card isn't 20% off if you're paying 21% to borrow the money.

Bought it on a credit card?

A 20% off gift card isn't 20% off if you're paying 21% to borrow the money.

Pay the card off that month and the deal is real. You even earn rewards. Carry the balance, and the interest eats the deal a little more every month, starting the day you buy it.

What deal did you get on a $100 card?
Still a deal, barely. $20 saved. $17.21 paid in interest. You're $2.79 ahead. The deal runs out after about 14 months. Most balances ride 9 to 13 months, so a 20% deal usually survives. A 10% deal usually doesn't.

What you're ahead or behind, by months until the balance is paid off, on a $100 card bought with a credit card you carry a balance on. 21.52% a year, the average rate on accounts that carry a balance (Federal Reserve G.19, Q1 2026). Simple interest, no fees.

Go deeper: the arithmetic

21.52% a year is 1.79% a month. On the $80 you paid for the 20% off card, that's $1.43 a month. The deal gave you $20, so after 14 months the interest has eaten all of it. A 10% off card ($90 paid, $1.61 a month) is gone in 6 months. A 5% off card ($95 paid, $1.70 a month) is gone in 3.

When you already carry a balance, most cards charge interest on new purchases from the day you buy, with no grace period. And the deal only counts once you have actually spent the card. Every month it sits in the drawer, the interest keeps running and the gain hasn't arrived yet.

The same $80 paid toward the balance instead would have saved the same $1.43 a month. So if you owe on a credit card, the cheapest gift card is the one you don't buy.

Rate: Federal Reserve G.19, Q1 2026. How long balances ride: prime borrowers about 9 months, subprime about 13 (CFPB data via SuperMoney, 2026). Your inputs, your math; not a promise about what you'll save.

Already have the card? The deal is paid for. Use it, and let CardCue Pro remind you at the store.
Side by side

Same $100 of shopping. Six ways to pay. What each one really costs you.

A gift card you already have is money you already paid for. A credit card you don't pay off charges you every month you wait.

Go deeper: the six ways

The average credit card rate for people who carry a balance is 21.52% a year (Federal Reserve, Q1 2026). That's 1.79% a month. Pay $100 off over three months and the interest is $1.79, then $1.20, then $0.60: $3.59 total. Leave it on the card for a year and it's $21.52 or more.

A Visa or Mastercard gift card costs the amount on it plus a fee of about $3.95 to $6.95, so a $100 card runs about $106 (Gerald, October 2026). Some of them also start charging a monthly fee after a year of not being used.

The "10% off" card is one you bought at a discount. The deal only counts if you would have shopped there anyway.

Money the stores are holding for us

Gift card money customers paid but haven't spent, in billions.

Amazon, Starbucks (cards and rewards), Target, Home Depot, from their 2025 annual reports (SEC). Most of it will be spent. The part that never is has a name: breakage. Bigger

Already have the card? Use it. CardCue Pro reminds you where.

CardCue Pro keeps every card's balance, expiration and barcode in one place, and chirps when you're near a store where you have a card. Free for 3 cards. iPhone, with an Apple Watch app on every plan.

Download on the App Store Not a bank or card issuer. It never holds, funds or guarantees a balance.
Try Free