Estimate payoff time avalanching debt by highest interest rate.
Extra money flows toward the highest APR balance, which removes the most expensive interest first before moving down the ladder. Paying the highest rate first usually saves the most total interest, making it ideal for disciplined savers on long timelines.
Debt Avalanche
Payoff months = -ln(1 - rate x debt / payment) / monthly rate
Payoff months = -ln(1 - rate x debt / payment) / monthly rate Extra money flows toward the highest APR balance, which removes the most expensive interest first before moving down the ladder.
Paying the highest rate first usually saves the most total interest, making it ideal for disciplined savers on long timelines.
This calculator takes 3 inputs: Total debt, Weighted APR, Monthly payment. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.