Debt Payoff Calculator

Compare snowball vs avalanche — see which saves you more

Your debts
Extra monthly payment
Your debt data is stored only in your browser and never sent to any server.

How the debt snowball and avalanche methods work

Both the debt snowball and avalanche methods focus on paying off one debt at a time while making minimum payments on the rest. The difference is which debt you target first.

Debt snowball focuses on the smallest balance first, regardless of interest rate. You pay it off quickly, get a psychological win, then "snowball" that payment into the next smallest debt. This method is popular because it builds momentum — you see debts disappearing faster, which keeps you motivated.

Debt avalanche targets the highest interest rate first. This is mathematically optimal — you'll pay less total interest and typically become debt-free slightly sooner. However, if your highest-rate debt also has the largest balance, it can take months before you eliminate your first debt.

Which method should you use?

If you need motivation and quick wins, use snowball. If you want to minimize total interest paid, use avalanche. This calculator shows both side by side so you can see the exact difference in months and dollars for your specific situation.

Track your subscriptions too

Canceling even one $15/month subscription frees up $180/year for debt payoff.

Open Subscription Tracker →

Related free tools

Subscription Tracker — Cancel subscriptions and redirect savings to debt

50/30/20 Budget Calculator — Budget your income to maximize debt payments

Net Worth Calculator — See how paying off debt changes your net worth

Paycheck Budget Calculator — Allocate each paycheck toward debt payoff

Related guides

Subscription Costs in 2026 — Money you could redirect to debt

Paycheck Budgeting Guide — Budget system that prioritizes debt payoff