Store Credit Card Payoff Calculator: Months and Interest to Clear a Balance
Work out how long a store credit card takes to pay off at a fixed monthly payment — and the total interest you'll pay at the punishingly high APRs these cards typically carry.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year payoff schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Time to pay off | Total interest | Total paid |
|---|---|---|---|
| $2,000 · 24% · $100/mo | 2y 2m | $579.75 | $2,579.75 |
| $2,000 · 29.99% · $100/mo | 2y 5m | $806.76 | $2,806.76 |
| $1,000 · 26% · $150/mo | 8 months | $92.01 | $1,092.01 |
| $3,500 · 28% · $200/mo | 1y 11m | $1,051.09 | $4,551.09 |
How This Calculator Works
Enter the balance, the card's APR, and the fixed amount you'll pay each month. The calculator simulates the balance month by month — applying interest, subtracting your payment — until it clears, then totals the interest paid. It assumes no new purchases.
The Formula
Debt Payoff Time
B = balance, P = fixed monthly payment, r = monthly rate (APR ÷ 12), n = months to clear
Worked Example
A $2,000 store card balance at 24% APR, paid $100 a month, takes 26 months to clear and costs about $580 in interest. At a typical store-card APR of 28% to 32% it's worse still. The deferred-interest 'no interest if paid in full' promos are the real trap: miss the deadline by a day and the entire accrued interest from day one is added back.
Key Insight
Store credit cards are among the most expensive consumer debt available — APRs of 25% to 32% are normal, far above general-purpose cards. The discount that gets you to open one (often 10% to 20% off the first purchase) is a one-time benefit; the interest is forever if you carry a balance. Two rules: pay store cards off in full every month, and treat any deferred-interest promotion as a hard deadline, because missing it retroactively charges interest on the entire original balance. If you're carrying a balance, a balance transfer to a lower-APR card or a personal loan almost always saves money.
Frequently Asked Questions
How is store card payoff time calculated?
The calculator applies the monthly interest rate (APR ÷ 12) to the balance, subtracts your fixed payment, and repeats month by month until the balance reaches zero — counting the months and summing the interest along the way.
Why are store credit card APRs so high?
Store cards are easy to qualify for and marketed at checkout to drive sales, so issuers price in higher default risk with APRs of 25% to 32% — often 5 to 10 points above general-purpose cards. The first-purchase discount is bait; the ongoing interest is where the cost lives.
What is deferred interest and why is it dangerous?
Many store cards offer 'no interest if paid in full' over a promo period. If you don't clear the entire balance by the deadline, the issuer charges all the interest that would have accrued from day one — retroactively. Missing the date by one day can add hundreds in back-interest.
What if my payment doesn't cover the interest?
Then the balance grows and never clears. At 24% APR a $2,000 balance accrues about $40 of interest the first month, so a payment at or below $40 makes no progress. The calculator flags this — increase the payment above the first month's interest.
Should I transfer a store card balance?
Often yes. Moving a high-APR store balance to a lower-rate balance-transfer card or a personal loan can cut interest sharply. Compare the transfer fee and new rate against the store card's APR — at 24% to 32%, most alternatives win.
Related Calculators
Methodology & Review
A month-by-month simulation applies monthly interest (APR / 12) to the balance, subtracts the fixed payment, and repeats until the balance clears. It assumes no new purchases and a constant payment; deferred-interest promotions and fees are not modeled.
Written by Ugo Candido · Last updated May 22, 2026.