Back-to-School Spending Hit $489 a Kid This Year. What Happens If You Put It On a Store Card?

Parents are budgeting $489 per child for back-to-school shopping this year, up 11.7% from last year's $437, according to JLL's 2026 back-to-school shopping report — a jump that runs nearly three times faster than the roughly 4% inflation rate. Most families will cover that bill one of two ways: money set aside in advance, or a card swiped at checkout. The math behind those two choices isn't close.

Tariffs are a real driver here, not background noise. School supplies alone are up 7.7% year over year, and Newell Brands — the maker of Sharpie, Paper Mate, and Expo — has absorbed more than $300 million in tariff costs since 2025 that are now showing up on store shelves. This is also the first back-to-school season where most items on the supply list were actually imported at the higher tariff rate, rather than stocked before it took effect.

None of that is a reason to skip the shopping trip. It's a reason to decide, before the first receipt prints, which side of that swing a family lands on — because at these rates, the difference isn't a rounding error. It's real money, and unlike tariffs or sticker prices, it's fully within a parent's control.

The Sticker Price Isn't the Whole Bill

The $489 figure is what shows up at the register. It isn't what shows up on next month's statement if that purchase goes on a store card instead of money already set aside. Retail credit cards — the ones offered at checkout with a discount for signing up on the spot — carry an average APR of 30.14%, according to Bankrate's national survey of 110 retail cards. That's nearly 1.5 times the average general-purpose credit card rate, and 13 of the cards Bankrate surveyed, including the Saks Credit Card and the Victoria's Secret Mastercard, charge 35.99%.

Retailers have extra incentive to push these cards this particular season. Tariff-driven cost increases are squeezing margins on the same school-supply categories seeing price hikes, and store card interest revenue is one of the few line items a retailer controls directly. A cashier offering "15% off today" isn't doing you a special favor — it's a standard part of how a squeezed margin gets made up somewhere else in the transaction.

Store cards are attractive at the register because the discount is immediate and the interest is invisible until the bill arrives. A parent who plans ahead pays the sticker price once. A parent who charges it pays the sticker price plus however many months it takes to pay off a balance carrying more than triple the rate of the average savings account.

What $40.75 a Month Buys You Instead

Run the numbers both directions using the High-Yield Savings Calculator. Setting aside $40.75 a month for 12 months — the same $489 total, split into a paycheck-sized chunk — into a top-rate account like Forbright Bank's 4.15% APY, the highest widely available rate this week, grows to about $498.45 by the time school starts. That's roughly $9.45 earned for doing nothing but moving the deposit date earlier.

Now run it the other direction. Put that same $489 on a store card at the 30.14% average APR and pay it off over six months, and the interest adds up to about $44, pushing the real cost to roughly $533. Stretch the identical balance over twelve months instead and the interest nearly doubles, to about $84, for a real cost past $573. The rate never changes between the two timelines. What changes is how long the balance sits there compounding against you — the same mechanic that makes saving early work in your favor and financing late work against you.

The Real Cost of $489, Three Ways

Between the sinking fund and the twelve-month store card payoff sits a swing of about $93 on a single child's back-to-school bill — the $9.45 earned versus the $84 lost. For a family with two kids doing this every August, that's roughly $186 a year, repeating for as long as there's a school supply list in the house, which for most families runs eight to thirteen years.

Why the Store Card Wins at the Register

Store cards aren't marketed as expensive — they're marketed as a discount. The 15%-off-today offer is real, and it's also the reason the average retail APR sits at 30.14% instead of something closer to a general-purpose card: the discount subsidizes the offer, and the retailer is betting a share of cardholders will carry a balance past the promotional period. Don't be emotional about a checkout-counter discount and stick to a plan made in July, not August — rational money decisions get made before the deadline, not at the register.

There's a sharper trap layered on top of the 30.14% average, too: many retail cards use deferred-interest promotions instead of a straight rate. Miss the payoff deadline by even one billing cycle — say, paying off $470 of a $489 balance by the promo end date — and the retailer is allowed to charge interest retroactively on the entire original balance, not just what's left. A parent who assumed a "0% for six months" offer meant no cost at all can end up owing more in retroactive interest than the twelve-month scenario above, on a purchase they thought was already handled.

For families who can't front $489 today no matter how the math works, a general-purpose card at the roughly 22% national average — still expensive — cuts the interest on the twelve-month scenario from about $84 to about $60. It's not the sinking fund, and it's not free, but it beats reaching for the checkout-counter offer out of habit.

The fix isn't complicated, and it doesn't require earning more money. It requires deciding in June or July, before the supply list even arrives, that this year's back-to-school money lives in a savings account instead of on a card. The $40.75-a-month version of that decision costs nothing and pays $9.45. The store-card version of the same decision costs $44 to $84 in the best case, and potentially far more if a deferred-interest deadline gets missed.

The Thirteen-Year Version of This Habit

The swing here is small in any single year, which is exactly why it's easy to ignore. But take the roughly $90 a year a family isn't losing to store-card interest and run it through the Compound Interest Calculator instead of letting it disappear into a statement balance. Redirect that same $90 a year into an account earning a 7% average long-run return for the next 13 years — roughly the span of kindergarten through 12th grade — and it grows to about $1,813. That's not new money. It's the same $489 decision, moved two months earlier, every year, until it stops being a decision at all — and it works the same way for any predictable annual expense, not just school supplies.