Debt Payoff Calculator

Add your debts and see how long it takes to pay them off. Compare the avalanche method (highest interest first) with snowball (smallest balance first) to find which saves you more.

AvalancheRecommended

Pay highest interest rate first

$4,319
total interest paid
48 months
(4.0 years) to payoff
Snowball

Pay smallest balance first

$4,319
total interest paid
48 months
(4.0 years) to payoff

This calculator provides estimates for illustrative purposes only and does not constitute financial advice.

How it works

The calculator models two popular debt repayment strategies. The avalanche method prioritises debts with the highest interest rate first — you make minimum payments on all debts and put every extra dollar toward the highest-rate balance. This approach minimises the total interest you pay over the life of your debts and is mathematically optimal.

The snowball method, popularised by personal finance educator Dave Ramsey, prioritises the smallest balance first. By eliminating smaller debts quickly, you build momentum and motivation to keep going. While it may cost slightly more in total interest compared to the avalanche method, many people find the psychological wins make it easier to stick with the plan.

For each strategy, the calculator simulates month-by-month payments, tracking the declining balance of each debt and the total interest paid. The side-by-side comparison shows you exactly how many months each method takes and how much interest each one costs, so you can make an informed decision. All data stays in your browser — nothing is stored or transmitted.