Debt, budgeting and life insurance
See how many months it takes to pay off your credit card at a given payment and APR, and how much interest it costs. Raise the payment to see the difference.
This calculator shows how many months it takes to pay off a credit card at a fixed monthly payment, and how much interest you pay along the way. The month count comes from the standard payoff formula, N = −ln(1 − B × r / M) / ln(1 + r), where B is the balance, r is the monthly rate (APR ÷ 12) and M is the monthly payment.
Card rates now average above 21%, so a minimum payment mostly feeds the interest. Adding $100 to $150 a month usually takes years off the payoff and saves a lot of interest. Try your own balance and rate in the calculator.
The avalanche puts extra money toward the card with the highest APR first, which costs the least interest. The snowball starts with the smallest balance first, which gets you quick wins and keeps some people motivated.
Most of the payment goes to interest. At 21.5% APR, an $8,500 balance accrues $152.29 in interest in the first month, so a $200 payment cuts the balance by less than $48.
Calculate your monthly student loan payment and total interest, and see how many months and dollars an extra monthly payment saves.
Estimate the monthly payment, total interest, cash you receive after fees and true APR on a personal or auto loan with an origination fee.
Work out your front-end and back-end debt-to-income ratio and see how it compares with conventional (28/36), FHA (31/43) and Qualified Mortgage limits.
Estimate how much life insurance you need with the DIME method: debts, income replacement, mortgage and education, minus savings and existing coverage.
Enter your monthly take-home pay and see how the 50/30/20 rule splits it into needs, wants and savings or debt payoff.
Estimate your 2026 federal, FICA, state and local income tax, plus your marginal bracket and effective tax rate.