Debt Payoff Calculator

When you owe money on several debts at once — credit cards, loans, lines of credit — a payoff strategy helps you clear them efficiently rather than spreading effort thinly. The two best-known methods are the debt avalanche and the debt snowball. Both involve paying the minimum on every debt and channeling all your extra money toward one target debt at a time, but they differ in which debt they attack first.

The avalanche method targets the debt with the highest interest rate first, regardless of its balance. Once that debt is gone, you roll its entire payment into the next-highest-rate debt, and so on. Because you eliminate your most expensive debt soonest, the avalanche method mathematically minimizes the total interest you pay and usually clears all your debt fastest. For anyone focused purely on the numbers, it's the optimal choice.

The snowball method targets the smallest balance first, regardless of interest rate. As each small debt is paid off, you roll its payment into the next-smallest, building momentum. The snowball typically costs a little more in total interest than the avalanche, but it delivers quick, visible wins — entire debts disappearing early — which many people find powerfully motivating. Behavioral research suggests that for some, the psychological boost of the snowball keeps them on track better than the mathematically optimal avalanche.

The shared engine behind both is the rollover. By keeping your total monthly debt payment constant even as individual debts are cleared, each paid-off debt frees up its payment to accelerate the next — the "snowball" effect that gives the method its name and powers the avalanche too. The extra you commit each month above the combined minimums is the single biggest factor in how fast you become debt-free.

Which method is best depends on you. If saving the most money matters most, choose avalanche. If you need momentum and motivation to stay disciplined, choose snowball. Either is vastly better than paying only minimums, which can keep high-interest debt alive for years. This calculator runs both strategies on your actual debts so you can compare the interest cost and payoff timeline and make an informed choice. Consolidation or a balance transfer can complement either approach by lowering the rates involved.