Debt Payoff Calculator
Snowball vs avalanche — let AI pick the strategy that gets you debt-free fastest.
Finance tools · Free · AI-powered
About the Debt Payoff Calculator
Carrying multiple debts? You have two evidence-based strategies for paying them off: the snowball method (smallest balance first, for psychological wins) or the avalanche method (highest interest rate first, for the most money saved).
This calculator runs both side-by-side so you can see exactly how many months and how much interest each strategy will cost you. Add every debt with its current balance, APR, and minimum monthly payment. Then add any extra money you can put toward debt each month — even an extra $50 makes a measurable difference.
Snowball or avalanche? Mathematically, avalanche always wins on total interest. But behaviorally, many people find snowball easier to stick with — knocking out small debts early keeps motivation up. If you've failed at payoff plans before, snowball's quick wins matter more than the math.
The hidden lever: your minimum payment. Paying only the minimum can stretch a card balance over many years. On a $5,000 card at 21% APR, raising a $150 payment to $300 cuts payoff from about 51 months to 20 and saves roughly $1,600 in interest. Try it in the calculator.
Refinance before you pay off. If any of your debts are above 18% APR, look at a 0% balance transfer card or a lower-rate personal loan before you start the snowball. Lowering the rate is mathematically equivalent to making free extra payments — every month, forever.
How to use it
- Add each debt. Enter every credit card, loan, or balance you owe — name, balance, APR, and minimum payment.
- Add your extra payment. Set how much extra you can put toward debt each month above the minimums.
- Compare strategies. Snowball vs avalanche projections appear side-by-side with months-to-debt-free and total interest.
- Pick the recommended strategy. The calculator highlights the winner — usually avalanche, sometimes snowball.
- Start with debt #1. Apply the extra payment to the top-priority debt; pay minimums on the rest.
Frequently asked questions
How does the debt payoff calculator decide which strategy is recommended?
It highlights whichever strategy pays less total interest. If only one of the two clears your debts within 50 years, that one is recommended, and if both cost exactly the same interest, snowball is highlighted.
Why do snowball and avalanche show the same result in the debt payoff calculator?
When your smallest balance also has the highest APR, both methods attack the same debt first, so the results are identical. The default example is like this: a $5,000 card at 21% and a $12,000 car loan at 6.5% with $200 extra a month take 38 months and about $2,269 in interest under either strategy.
What happens to a paid-off debt's minimum payment in the debt payoff calculator?
Your Extra monthly amount always goes to the current priority debt, but once a debt is cleared its minimum payment drops out of the monthly total instead of rolling into the next debt. To model a classic snowball where freed-up minimums keep working, raise Extra monthly by the minimum you no longer owe.
What does "Never" mean in the debt payoff calculator?
It means your payments don't cover the interest, so the balances aren't paid off within the 50-year (600-month) simulation. Raise the minimum payments or the Extra monthly amount until a months-to-debt-free figure appears.
Does the debt payoff calculator use my credit card's real minimum-payment formula?
No. It uses the fixed dollar minimum you type for every month, charges interest monthly at APR ÷ 12, and assumes no new charges, fees or promotional rates. Real card minimums often shrink as the balance falls, which stretches payoff out, so paying a fixed amount like the calculator does will usually finish sooner than paying only the bill's minimum.
Guides that use this tool
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