How this calculator works
This calculator estimates how long it may take to pay off one credit card balance when you pay the same total amount each month. You enter the current balance, annual percentage rate (APR), minimum payment, and any extra payment you plan to add on top of the minimum each month.
Each month, the calculator charges interest on the remaining balance at the monthly rate (APR divided by 12). Your total payment—the minimum plus extra—is applied after interest. The portion above interest reduces principal. The process repeats until the balance reaches zero or the payment is too low to reduce principal.
If your total monthly payment is less than or equal to the first month's interest charge, payoff is not possible and the result shows "not reached." That happens when the payment cannot cover accruing interest, which is common on high balances with minimum-only payments on high-APR cards.
Outputs include payoff date, months to payoff, total interest paid, total amount paid (balance plus interest), monthly payment used, a month-by-month schedule, and a comparison baseline showing payoff time and interest if you paid the minimum with no extra. The schedule lists payment, principal, interest, and remaining balance for each month.
The model treats the minimum payment as a fixed dollar amount you enter. Real card issuers often recalculate minimums as balances fall. It does not include new purchases, late fees, balance transfer fees, promotional rate changes, or penalty APRs.
What affects the result
Four inputs control payoff timing and total interest. On high-APR debt, small payment changes often produce large differences in cost and timeline.
- Current balance is the amount owed today. A higher balance takes longer to eliminate and generates more interest each month at the same APR and payment level.
- APR sets the monthly interest rate. Higher APRs mean more of each payment goes to interest and less to principal. Cards in the 20%–25% range can charge hundreds in interest monthly on moderate balances.
- Minimum payment is the required monthly amount before extras. This calculator adds your extra payment on top, so total monthly payment equals minimum plus extra. Enter the minimum from your statement, not the total you plan to pay unless extra is zero.
- Extra payment is the additional amount above the minimum you commit to each month. Even $25 to $100 extra on high-rate balances often shortens payoff by months or years and cuts total interest sharply compared with minimum-only payments.
The calculator also shows a minimum-only baseline using the same balance, APR, and minimum with zero extra. That side-by-side comparison highlights the cost of paying only the minimum.
Real-world examples
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Moderate balance with modest extra payment. Balance $5,200 at 22.99% APR, $150 minimum, $75 extra ($225 total monthly). Interest in month one is roughly $100, leaving about $125 for principal. Payoff typically arrives in roughly 2½ years with materially less interest than minimum-only payments over a much longer horizon.
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Minimum-only struggle. Same $5,200 balance at 22.99% with $150 minimum and $0 extra. If the payment barely exceeds interest, payoff takes many years and total interest can exceed the original balance. The baseline panel in the calculator makes this contrast explicit.
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Higher balance, aggressive payoff. $12,000 at 24% APR, $360 minimum, $240 extra ($600 total). The larger payment attacks principal faster; total interest drops substantially versus a $360-only plan. Run both scenarios to quantify how much the extra $240 saves in dollars, not just months.
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Payment too low to progress. $8,000 at 27% APR with $175 total monthly payment. Monthly interest near $180 means the payment does not reduce principal—the payoff date shows not reached. You must raise the payment above the interest charge before debt can shrink.
Common mistakes
- Entering total planned payment as the minimum. If you pay $300 total with a $120 minimum, enter $120 minimum and $180 extra—not $300 minimum with no extra.
- Using promotional APR for the whole payoff period. A 0% intro rate that expires in 15 months requires separate scenarios before and after the promo ends.
- Ignoring new charges while paying down. Purchases added during payoff extend the real timeline; this calculator assumes a frozen balance.
- Assuming the minimum stays fixed in real life. Issuers often lower minimums as balances fall, which can lengthen actual payoff compared with this model.
- Comparing cards without checking whether payoff is possible. A "not reached" result means increase payment before comparing strategies across cards.
- Forgetting balance transfer fees. A 3% transfer fee on $6,000 adds $180 upfront; factor that outside this calculator when evaluating transfers.
When to use this calculator
Use this calculator when you are focused on one credit card and want a payoff date, total interest estimate, and payment schedule. It fits planning how much extra you can afford to add each month and seeing the dollar impact of that commitment.
Run it before and after a budget change—such as applying a raise or canceled subscription to debt—to see how many months that frees up. Use it to test whether a balance transfer promotional period gives enough runway at your planned payment level.
For multiple cards with snowball or avalanche strategies, switch to the debt payoff calculator. To track how paying down affects credit utilization, pair results with the credit utilization calculator. If minimum payments are unaffordable or balances are growing despite payments, seek nonprofit credit counseling rather than relying on estimates alone.
Related calculators
Compare snowball and avalanche strategies across several debts with the debt payoff calculator. For a month-by-month snowball schedule focused on smallest balances first, use the debt snowball calculator. See how payoff affects credit usage with the credit utilization calculator. Weigh consolidating to a fixed personal loan with the personal loan calculator. To convert between APR and effective annual yield on savings or loan quotes, try the APR and APY converter.
FAQ
How is this different from the debt payoff calculator?
This calculator focuses on one credit card with a fixed monthly payment equal to your minimum plus any extra you enter. The debt payoff calculator handles multiple debts and compares snowball and avalanche strategies that redirect payments as accounts are cleared. Use this tool for deep single-card planning; use debt payoff when prioritizing across several balances.
Does this use a changing minimum payment?
No. The minimum payment is treated as a fixed dollar amount for the entire payoff period, with your extra payment added on top each month. Real card issuers often lower the minimum as the balance falls, which can lengthen actual payoff compared with this estimate. Update inputs if your statement minimum changes materially.
What if the payoff date says not reached?
That means your total monthly payment is not high enough to cover monthly interest and reduce principal with the balance and APR entered. Increase the minimum or extra payment until the total exceeds the first month's interest charge. On high-APR cards, minimum-only payments sometimes fail this test on large balances.
Should I stop using the card while paying it off?
New purchases are not modeled here. Adding charges while paying down extends the real timeline and can offset extra payments. Many successful payoff plans freeze the card or remove it from wallets until the balance is zero. If you must use credit, track new charges separately from this estimate.
How much difference does an extra $50 per month make?
On high-APR balances, even modest extras often shorten payoff by many months and save hundreds or thousands in interest compared with minimum-only payments. Run the calculator twice with and without the extra amount using the same balance and APR. The baseline panel shows minimum-only interest and timeline for quick comparison.
How is interest calculated each month?
The calculator applies a monthly rate equal to APR divided by twelve to the remaining balance, then subtracts that interest from your total payment. The remainder reduces principal. Real cards may use average daily balance methods and daily periodic rates, but for steady payments without new charges, monthly modeling captures the trend accurately for planning.
Does this include balance transfer fees or promo rates?
No. It uses one fixed APR for the entire payoff period and does not add transfer fees or model rate increases after promotional periods end. If you transfer a balance, run one scenario at the promo rate for the promo length and another at the standard rate afterward, adding any transfer fee to your cost comparison manually.
What does total paid include?
Total paid equals the starting balance plus all interest accrued during payoff. It reflects payments made according to the schedule until the balance reaches zero. It does not include annual fees, late fees, or new purchases. If payoff is not possible with your inputs, total paid stays at zero because no amortizing schedule is produced.
Can I trust the payoff schedule month by month?
The schedule follows the same monthly interest and fixed payment logic as the summary results. It is a planning tool, not a copy of your issuer's exact rounding or daily balance rules. Use it to see how principal and interest shift over time and to compare payment strategies, then verify major decisions against your card statement or issuer payoff quote.
When should I seek help beyond a calculator?
If minimum payments are unaffordable, balances grow despite payments, accounts are delinquent, or you are considering bankruptcy, a calculator alone may not be enough. Nonprofit credit counseling agencies can review options including debt management plans. Contact issuers before missed payments trigger fees, penalty APRs, and credit damage that make payoff harder.