Debt Payoff Calculator
Free debt payoff calculator comparing the snowball and avalanche methods side by side, with payoff dates, total interest, and CSV export.
Frequently asked questions
Snowball or avalanche — which is better?
Avalanche (highest APR first) always minimises total interest; that is mathematically guaranteed. Snowball (smallest balance first) clears individual debts sooner, which many people find more motivating. This calculator runs both so you can see exactly what the difference costs in dollars and months.
What does the extra payment do?
Every debt receives its minimum payment first. Whatever is left over — your extra amount — is funnelled entirely into one target debt chosen by the strategy. When that debt clears, its payment rolls into the next target.
Why does it warn that my balances would grow forever?
If your total monthly payment is smaller than the interest accruing each month, the balances increase no matter how long you pay. When that happens the calculator flags it instead of showing an impossible payoff date.