The National Retail Federation expects holiday sales to reach $1.013 trillion this year, up 4.2% from 2025, according to its October 15 forecast. A lot of the big-ticket part of that will be financed at the register with an offer that sounds like free money: no interest if paid in full in 12 months. That’s a deferred interest promotion, and it isn’t the same as a 0% APR. Miss the payoff by $60 and you can owe $221 in back interest.
Deferred interest is a loan with a trapdoor
On a true 0% intro APR credit card, interest starts when the promotional period ends, and only on whatever balance is left. A deferred interest promotion works differently. Interest builds quietly from the day you buy, and as the Consumer Financial Protection Bureau explains, if any of the promotional balance remains when the period ends, that interest is charged retroactively, all the way back to the purchase date.
Store cards are where these offers usually live, and they’re expensive cards to begin with. A CFPB report in December 2024 found that retail credit cards carried an average APR of 32.66%, and that 90% of them had a maximum APR above 30%, compared with 38% of general-purpose cards. Best Buy’s financing page, for one, describes 12-month deferred interest on purchases of $299 and up through its Citibank-issued store cards. Plenty of other retailers offer similar deals at checkout in November.
The worked example: $1,200 and a $60 miss
Say you buy a $1,200 TV on Black Friday with a 12-month deferred interest offer on a store card at 32.66%. You plan to pay $95 a month, which feels close enough. After 12 payments you’ve paid $1,140, and $60 is left when the promotion ends.
Because the interest was accruing all along on a balance that fell by $95 each month, the bank now adds the full amount to your account: $221.27. That’s 18.4% of the original price, triggered by a balance of $60. If you’d paid $100 a month instead, you’d have finished on time and owed nothing.
Put the same purchase on a general-purpose card with a true 0% intro APR and make the same $95 payments, and the outcome is completely different. You’d owe interest only on the $60 that’s left. At 22.15%, the average rate the Federal Reserve reported in August for card accounts that pay interest, one month of interest on $60 is about $1.11.
| Same $1,200 purchase, $60 left after 12 months | Interest owed |
|---|---|
| Deferred interest store card at 32.66% | $221.27 |
| True 0% intro APR card, then 22.15% | about $1.11 for the next month |
Why paying extra still might not save you
Most advice about these offers stops at “pay it off in time,” which misses a bigger problem. If you keep using the store card for new purchases, your extra payments may not go toward the promotional balance at all.
Under Regulation Z, any amount you pay above the minimum has to go to the balance with the highest interest rate first. A promotional balance carries no current interest, so new purchases at the card’s regular rate come first in line. Your extra $50 a month can quietly pay off this spring’s purchases while the TV balance barely moves. The rule only flips in the last two billing cycles before the promotion ends, when extra payments go to the deferred interest balance first. By then, the remaining balance may be too large to clear in two payments.
The CFPB saw exactly this pattern when it studied these promotions. Among consumers who were charged deferred interest and had made other purchases on the same account, more than half had paid more than the full promotional balance during the promotional period. More than a third had paid over 150% of it. They weren’t careless. Their money just went to other balances first.
Higher store card rates make the same mistake cost more
None of this is new. When the CFPB first pushed retailers toward clearer promotions in 2017, it noted that deferred interest purchases had grown 21% between 2010 and 2013 and that the rates on these cards were generally around 25%. What has changed is the rate behind the promise. At 25%, the same $1,200 purchase with $60 left over would have produced $169.38 in back interest. At the 32.66% average the CFPB found in 2024, it’s $221.27, about $52 more for exactly the same slip.
That’s also why the gap between a store card and a regular card has widened. Retail cards were already priced for people who carry a balance, and the deferred interest structure means the full rate applies to the full purchase the moment you miss. Some retailers also offer reduced-rate plans that charge a lower interest rate inside fixed monthly payments. Those are less of a trap because there’s no retroactive charge, though you’ll pay some interest from the start. If the choice is between that and a deferred interest offer you’re not sure you can finish, the boring plan is usually the cheaper one.
How to use a deferred interest offer without paying for it
If you do take one of these offers, treat the card as a single-purpose loan. Don’t make any other purchases on it until the promotional balance is gone. That keeps the payment allocation simple: every dollar you pay goes to the one balance on the account.
Then do the payoff math with a buffer. Divide the purchase price by one fewer month than the promotion lasts, so a 12-month offer gets divided by 11. On $1,200, that’s $109.09 a month, and it means the balance is gone a full billing cycle before the deadline, which protects you from a late statement or a payment that posts a few days after you expected. Set it up as an automatic payment for that amount, not the minimum. The required minimum payment can be lower than what it takes to clear the balance before the deadline, so paying only the minimum is how many people end up short.
Finally, put the expiration date somewhere you’ll see it. It’s on your statement, but a reminder on your phone calendar two months before the date costs nothing.
When to skip the store card
If you already have a general-purpose card with a 0% intro APR, or you qualify for one, that’s the better tool for a big holiday purchase, because a near-miss costs you a dollar or two instead of a couple hundred. If you’re planning to open a store card mainly for a sign-up discount, check how it’ll affect your credit too. A new account and a high balance on a card with a modest limit both show up on your report; the post on how your statement closing date affects utilization explains why the timing of that balance matters.
And if the only way the purchase works is through a promotion, it may be worth asking whether it belongs in this year’s budget at all. A deferred interest offer is a bet that you’ll pay on schedule for a year without a single slip. Make that bet only if you’ve already done the math, the card has no other balance on it, and $109 a month fits in your budget without help.
Sources: National Retail Federation, 2026 holiday forecast; CFPB on deferred interest promotions; CFPB, Regulation Z §1026.53 payment allocation; Federal Reserve, Consumer Credit G.19, August 2026
