Debt Snowball Calculator
Pay off debt, smallest first.
- 100% free
- No sign-up
- Private — runs in your browser
- Instant results
What is the debt snowball method?
The debt snowball is a payoff strategy where you list your debts from smallest balance to largest, pay the minimum on all of them, and throw every extra peso or dollar at the smallest one. When that debt is gone, its payment "rolls" into the next-smallest — a snowball that grows as you go. This calculator simulates the whole plan month by month and shows when you'll be debt-free, how much interest you'll pay, and the order to tackle your debts.
Why smallest-first works
Paying the smallest balance first isn't the cheapest method mathematically, but it's the most motivating. Knocking out a whole debt quickly gives you a visible win, and those early wins keep people going. Studies have found that people who use the snowball are more likely to actually finish paying off their debt — and a plan you stick to beats a "perfect" plan you abandon.
Snowball vs. avalanche
The avalanche method instead targets the highest interest rate first, which saves the most money overall. The trade-off is motivation: high-interest debts often have large balances, so it can take a while to see progress. If staying motivated is your challenge, the snowball wins; if you're disciplined and want to minimize interest, the avalanche is cheaper. This tool models the snowball.
How to use it
- Add each debt with its balance, interest rate (APR), and minimum monthly payment.
- Enter how much extra you can put toward debt each month.
- The calculator orders your debts smallest-first and shows your debt-free date and total interest.
FAQ
What if my minimums don't cover the interest?
If the minimum payments barely cover interest, balances shrink very slowly. Increasing your extra payment is the fastest way to break out — even a small amount dramatically shortens the timeline.
Should I include my mortgage?
Most people focus the snowball on consumer debts — credit cards, personal and car loans — and treat the mortgage separately. You can include any debt you like; just add it as a row.
Does paying extra really help that much?
Yes. Because extra payments go straight to principal, they cut both the time and the total interest significantly. Try changing the extra-payment amount to see the effect.