Debt Avalanche Calculator

List each debt – balance, rate, and minimum – plus any extra you can put toward them. This debt avalanche calculator targets your highest interest rate first to minimize what you pay, then shows your debt-free date. It runs entirely in your browser, with nothing saved.

How the debt avalanche calculator works

The avalanche method pays the minimum on every debt, then sends all spare money to the debt with the highest interest rate. Clearing the priciest balance first stops the most expensive interest from accruing. This debt avalanche calculator simulates each month – adding interest, paying minimums, and attacking the highest-rate balance – until every debt is gone.

Estimates for general information only; not financial or tax advice. Real minimums and rates can shift over time.

A worked example

Take three debts: $4,000 at 25%, $2,500 at 19%, and $1,200 at 12%, with minimums of $90, $65, and $35, plus $150 extra. The avalanche attacks the 25% debt first, then the 19%, then the 12% – highest rate to lowest.

With $340 a month, the debts clear in about 29 months and roughly $2,051 in interest. Compared with the snowball method on the same debts, the avalanche saves around $440 and finishes a month sooner, because it starves the highest rate first. Every month you deny the priciest debt is a month it cannot pile on more interest, and across a whole payoff that is where the savings quietly add up.

Avalanche vs snowball

Both methods pay minimums and pour extra at one target, but they choose the target differently: avalanche by highest rate, snowball by smallest balance. Avalanche is mathematically cheaper; the snowball feels faster because small debts vanish early. If the interest difference is small, the method you will stick with wins.

The Federal Trade Commission outlines both strategies for getting out of debt, and the Consumer Financial Protection Bureau covers when consolidation might beat either one. Consistency beats cleverness when it comes to debt payoff. A plan you follow for two years always beats a perfect plan you abandon after two months.

Want the motivational route instead? Try our debt snowball calculator, download the free Debt Payoff Spreadsheet, or browse our debt and loan calculators.

Frequently asked questions

What is the debt avalanche method?

You pay minimums on all debts, then direct every extra dollar to the one with the highest interest rate. It minimizes total interest by clearing the costliest debt first.

Is avalanche better than snowball?

On paper, yes – it usually saves more interest. But the snowball’s early wins keep some people more motivated, and finishing matters more than the method.

How much does avalanche save?

It depends on your rates and balances. When one debt has a much higher rate, avalanche can save a meaningful amount; when rates are similar, the two methods finish close together, in which case either choice is a good one.

Can I enter more than three debts?

Yes. Fill in each debt’s balance, rate, and minimum, and leave any extra rows blank. The tool handles them all at once.

What if I miss a month?

Skipping the extra payment slows progress and adds interest. The calculator assumes a steady monthly amount, so keeping it consistent gives the projected result.

Prefer quick wins? See our debt snowball calculator, or explore all our debt and loan calculators.