See exactly how long to pay off your credit card debt and how much interest it will cost. Find out how extra payments can save you thousands.
Credit card debt is expensive because of high APRs (often 20–30%) that compound monthly. This credit card payoff calculator shows your exact payoff timeline and total interest cost. Use it to see how increasing your monthly payment by even $50–$100 can cut months or years off your payoff date and save hundreds in interest. The month-by-month schedule shows exactly how your balance decreases over time. All calculations run in your browser — your data never leaves your device.
Unlike installment loans with a fixed term, credit cards are revolving debt — you can carry any balance and pay any amount above the minimum. The payoff calculator works by simulating the month-by-month balance reduction until the debt reaches zero:
Monthly Interest = Balance × (APR / 12)
New Balance = Balance + Monthly Interest − Payment
Repeat until Balance ≤ 0
For “solve for months” mode, the calculator uses the logarithmic formula: n = −ln(1 − r × B / P) / ln(1 + r), where r is the monthly rate, B is the balance, and P is the payment. For “solve for required payment” mode, it finds the PMT that zeros the balance in exactly your target number of months using the standard annuity formula. Both modes produce the same detailed month-by-month schedule so you can see every dollar of interest charged.
Ryan has a $4,500 credit card balance at 22.99% APR. He can comfortably pay $150/month. How long will it take to pay off, and what would paying $225/month instead look like?
At $150/month: Monthly rate = 22.99% / 12 = 1.916%. Using the payoff formula: n = −ln(1 − 0.01916 × 4,500 / 150) / ln(1.01916) = approximately 45 months (3 years 9 months). Total paid: $150 × 45 = $6,750. Total interest: $2,250.
At $225/month: The payoff time drops to approximately 25 months (2 years 1 month). Total paid: $225 × 25 = $5,625. Total interest: $1,125. By paying $75 more per month, Ryan saves $1,125 in interest and pays off his debt 20 months earlier. That extra $75/month costs him $1,875 in total additional payments but saves $1,125 in interest — a net benefit of saving 20 months of debt stress.
The payoff timeline depends on your balance, APR, and monthly payment. The formula is: months = −ln(1 − balance × monthly rate / payment) / ln(1 + monthly rate). A $4,500 balance at 22.99% APR with a $150/month payment takes about 45 months (nearly 4 years) and costs roughly $2,250 in interest. Making only the minimum payment can extend this to 10+ years. Our credit card payoff calculator shows your exact timeline instantly for any combination of balance, APR, and payment amount.
Credit card interest is some of the most expensive debt available to consumers. A $4,500 balance at 22.99% APR with a $150/month payment costs approximately $2,250 in total interest — meaning you pay back nearly $6,750 for $4,500 borrowed. At higher balances or APRs, the total interest can easily exceed the original balance. The key insight from the payoff calculator is how dramatically increasing your monthly payment reduces total interest: adding just $75/month to that example cuts the total interest by over $800 and trims 18 months off the payoff timeline.
Two popular strategies exist for paying off multiple credit cards: (1) Debt Avalanche — pay minimums on all cards, then put all extra money toward the highest-APR card first. This is mathematically optimal and saves the most in total interest. (2) Debt Snowball — pay minimums on all cards, then attack the lowest balance first regardless of rate. This provides quick psychological wins by eliminating cards faster and can help you stay motivated. Research suggests that for people who struggle with consistency, the Snowball method leads to better real-world outcomes despite costing slightly more in interest. Neither is wrong — choose the one you will actually stick to.
Credit card minimum payments are typically 1–3% of the outstanding balance or a flat dollar minimum (often $25–35), whichever is greater. Some issuers calculate minimums as 1% of the balance plus any accrued interest and fees. Making only minimum payments is financially very costly: on a $4,500 balance at 22.99% APR, paying only the minimums could take over 15 years and cost more than $5,000 in interest — more than the original balance. Credit card statements are now required by law to disclose how long it will take to pay off the balance making only minimum payments.
Credit card APR (Annual Percentage Rate) is divided by 12 to get the monthly periodic rate applied to your average daily balance. A 22.99% APR means a monthly rate of 22.99 / 12 = 1.916%. If you carry a $1,000 balance for a full month, you owe $1,000 × 0.01916 = $19.16 in interest. Unlike loans, credit cards have revolving balances — you can pay any amount between the minimum and the full balance. If you pay the full balance by the due date each month, you typically owe no interest at all due to the grace period. Interest only accrues when you carry a balance from one billing cycle to the next.