Debt decisions become easier when the balance, APR, payment and payoff date are on the same page. Model one debt first, then compare repayment strategies without changing the monthly budget between them.
Estimate how long it could take to pay off a credit-card balance and how extra payments could reduce interest and payoff time.
Run calculatorEstimate your payoff timeline and total interest, then see how extra payments could shorten the repayment period.
Run calculatorCompare debt snowball and debt avalanche using the same monthly debt budget, with modeled payoff time and interest for each strategy.
Run calculatorCalculate a modeled monthly car payment, financing interest, cash paid, and trade-in-adjusted acquisition cost.
Run calculatorEstimate a student-loan payoff timeline and see how paying more than the entered minimum could reduce interest and payoff time.
Run calculatorHow long could this balance take to repay at the payment I enter?
How much modeled interest changes if I pay more each month?
What is the difference between debt snowball and debt avalanche using the same total monthly debt budget?
How much of an auto payment is financing cost rather than vehicle price?
A better sequence
Enter the current balance, APR and payment rather than starting from a desired payoff date.
Test an extra-payment amount you could actually sustain and compare both time and modeled interest.
For multiple debts, keep the total debt budget identical when comparing snowball and avalanche so the strategy comparison is fair.
FAQ
When debts and payments behave as modeled, prioritizing the highest APR generally minimizes modeled interest. Real-world promotional rates, fees, minimum-payment changes and behavioral factors can change the practical result.
No. Calculators do not know future variable rates, fees, payment allocation rules, deferments or lender-specific changes unless you enter or model them.
The calculators show payoff math, not a recommendation to eliminate liquidity. Emergency reserves and near-term obligations should be considered separately.
Keep going
MFA tools are educational estimates, not financial, investment, tax, legal, insurance, lending or underwriting advice. Inputs, rules, rates and personal circumstances can change the result. Review the source and methodology notes on the relevant tool.