Credit Card Payoff Calculator
See how long it takes to pay off your credit card and how much interest it costs. Enter the balance, APR, and your monthly payment.
At $250.00/month it takes 26 payments. Paying more each month cuts both the time and the interest significantly.
How to use this calculator
Enter your card balance, the card's APR, and the monthly payment you plan to make. The calculator shows:
- Number of months until the balance is zero
- Total interest you will pay over that period
- Total amount paid (balance + interest)
To see the power of paying more, increase the monthly payment by $50 or $100 and notice how sharply the payoff timeline shortens. The relationship is non-linear — a small payment increase saves disproportionately more time when the balance and rate are high.
How credit card interest works
Credit cards charge interest on your outstanding balance every billing cycle. The APR (Annual Percentage Rate) is divided by 12 to get a monthly rate, and that rate is applied to whatever balance you carry into the period. When you make a payment, interest is satisfied first, and only the remainder reduces the principal.
On a card with a high APR, the monthly interest charge on a large balance can consume most of a modest payment. For example, on a $5,000 balance at 24% APR, monthly interest is $5,000 × (24% ÷ 12) = $100. A $150 payment reduces the principal by only $50. This is why balances can feel impossible to shrink with small payments — and why increasing the payment has such a dramatic effect.
Because each month's interest is charged on the remaining balance, every dollar you pay toward principal reduces future interest charges too. The more you pay above the minimum, the faster this cycle works in your favor.
The credit card payoff formula
Months to payoff = −log(1 − (r × B) / P) / log(1 + r)
Where B = balance, P = monthly payment, r = monthly interest rate (APR ÷ 12). This formula works only when P is greater than B × r (i.e., the payment exceeds monthly interest). The calculator simulates month by month to handle the final partial period accurately.
Worked example — step by step
You have a $5,000 credit card balance at 24% APR and plan to pay $250/month.
- Monthly rate: 24% ÷ 12 = 2%
- Month 1 interest: $5,000 × 2% = $100
- Month 1 principal reduction: $250 − $100 = $150
- New balance after Month 1: $4,850
- Month 2 interest: $4,850 × 2% = $97. Principal reduction = $153. Balance = $4,697.
The process continues for approximately 26 months, with total interest paid of roughly $1,400. Now increase the payment to $400/month:
- Payoff time drops to approximately 15 months
- Total interest falls to approximately $800
- You save roughly $600 in interest and become debt-free 11 months sooner
How to interpret your results
The total interest figure is the true cost of carrying the balance. Compare it to the balance itself: on high-APR cards carried for years, total interest can exceed the original balance. That comparison often motivates the behavior change needed to accelerate payoff.
The months to payoff number assumes you make the same payment each month, do not add new purchases to the card, and the APR does not change. In reality, new charges and variable rates affect the timeline — this tool is most accurate when used for a fixed balance you are actively paying off without adding new spending.
Common mistakes to avoid
- Continuing to use the card while paying it down. New purchases add to the balance and can offset every dollar you put toward payoff. For serious payoff efforts, set the card aside and use a debit card or cash during the repayment period.
- Paying only the minimum long-term. Minimum payments are designed to keep you in debt longer. They typically cover little more than the interest charge. Even paying a fixed amount slightly above the minimum dramatically shortens the payoff period.
- Not automating at least the minimum. A missed payment can trigger a late fee and, with some issuers, a penalty APR well above your regular rate. Automate the minimum payment, then make additional payments manually as your budget allows.
- Ignoring balance transfer offers without reading the fine print. A 0% intro rate can be powerful, but transfer fees (typically 3–5%) are charged upfront, and the promotional period has a hard expiration. If you don't pay the balance before the intro period ends, you may face a high regular rate.
- Paying off a card and then closing it immediately. Closing a credit card reduces your total available credit, which can raise your credit utilization ratio and lower your credit score. Unless there is a compelling reason to close it (annual fee you don't want to pay), keeping the account open and unused is often better for your credit profile.
Estimates only. New purchases, fees, penalty rates, or variable APR changes will affect your actual payoff. This is not financial advice.
How we calculate this
The calculator models payoff month by month. Each period, interest is charged on the remaining balance at the monthly rate (APR ÷ 12). The monthly payment is applied first to interest, then to principal. The process repeats until the balance reaches zero. If the payment is less than or equal to one month's interest, the balance never decreases and the calculator flags an error.
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Frequently asked questions
How long does it take to pay off a credit card?
It depends on your balance, the card's APR, and how much you pay each month. Enter those three values in the calculator to see the exact number of months and total interest. Because credit card APRs are typically high, even a modest increase in monthly payment can cut payoff time significantly.
Why is paying only the minimum so expensive?
Minimum payments are often set at just over the monthly interest charge, so the vast majority of your payment covers interest and almost nothing reduces the principal. With a high APR, this can stretch a balance over many years and multiply the total interest you pay several times over the original balance.
What APR do credit cards typically charge?
Credit card APRs vary by card type and creditworthiness but are generally high — many cards charge 20% or more for purchases. Because interest compounds monthly on the outstanding balance, a high APR makes carrying a balance very expensive compared with installment loans like mortgages or auto loans.
How is credit card interest calculated each month?
Most credit cards use an average daily balance method: your average balance over the billing cycle is multiplied by the daily periodic rate (APR ÷ 365) and then by the number of days in the cycle. This calculator uses a simplified monthly model (balance × APR ÷ 12) which closely approximates the result for planning purposes.
Should I consider a balance transfer?
A 0% introductory APR balance transfer can be an effective strategy: it pauses interest for a set period, allowing every payment to reduce principal directly. Watch for the balance transfer fee (often 3–5% of the amount transferred), the length of the intro period, and the rate that takes effect after — if you don't pay the balance off in time, the new rate can be just as high.
What is the avalanche method for paying off credit cards?
The debt avalanche method means directing any extra payment to the card with the highest APR while making minimums on all others. Once the highest-rate balance is gone, you apply all freed-up cash to the next-highest-rate card. This minimizes total interest paid across all your cards and is mathematically optimal.
Does making more than the minimum payment really help that much?
Yes — substantially. On a high-APR card, the difference between paying the minimum and paying a fixed amount two or three times larger can be the difference between 10+ years of debt and 2–3 years. Use the calculator to see the specific impact: enter your current payment, note the payoff date, then increase the payment by $50 or $100 and observe how much the timeline shrinks.
What happens if I make a late payment?
A late payment can trigger a late fee, and some issuers can raise your APR to a penalty rate — often significantly higher than your regular rate. On a large balance, a penalty rate makes payoff much harder. Automating the minimum payment ensures you avoid late fees and rate increases even in months when you plan to pay more manually.