Debt Payoff Calculator: Snowball vs Avalanche Method
Add your debts and an extra monthly payment, then compare the snowball and avalanche methods on payoff time and total interest. Free and private.
Last updated: June 2026
Your debts
Snowball vs avalanche
| Method | Payoff time | Total interest |
|---|---|---|
| Snowball (smallest first) | — | — |
| Avalanche (highest rate first) | — | — |
—
—
Which should you pick?
Avalanche saves the most money. Snowball clears small debts faster for motivation. If the interest difference is small, the method you will actually stick with wins.
Two proven ways out of debt
When you owe money on several debts at once, the order you pay them off changes how long it takes and how much interest you hand over. This debt payoff calculator simulates both popular strategies, the snowball and the avalanche, and shows the payoff time and total interest for each.
The snowball targets the smallest balance first, clearing debts quickly so you feel progress early. The avalanche targets the highest interest rate first, which is mathematically the cheapest and usually the fastest. Both pay minimums on everything else, and crucially, when one debt clears its payment rolls into the next, which is where the real acceleration comes from. Add an extra monthly amount and watch both timelines shrink.
This tool is different from a single-loan payoff calculator: it handles a whole stack of debts and decides the order for you. For one loan with extra payments, use the loan payoff calculator. To free up cash for that extra payment, build a plan with the budget calculator, and keep a cushion with the emergency fund calculator.
Disclaimer: This is a simplified simulation assuming fixed rates and steady payments, and is not financial advice. Actual interest depends on your lenders' terms. Full disclaimer.
How it works
Three quick steps — no account, nothing uploaded to a server.
Add your debts
Enter each balance, interest rate and minimum payment.
Set an extra payment
Add any amount you can pay above the minimums each month.
Compare the methods
See payoff time and total interest for snowball and avalanche.
Debt repayment guidance on this page aligns with resources from the Consumer Financial Protection Bureau (CFPB). Last checked July 2026.
FAQ
Frequently asked questions
What is the debt snowball method?
The snowball method pays the minimum on every debt and throws all spare money at the debt with the smallest balance first. Once that is cleared, you roll its payment into the next smallest, and so on. The balances fall one by one, giving quick wins that keep you motivated. It is not always the cheapest, but it is the most psychologically effective for many people.
What is the debt avalanche method?
The avalanche method also pays minimums on everything, but directs spare money at the debt with the highest interest rate first. Because you kill the most expensive debt soonest, you pay the least total interest and usually get out of debt fastest. It needs more discipline because the first payoff can take longer than with the snowball.
Which is better, snowball or avalanche?
Avalanche saves the most money and time mathematically. Snowball wins on motivation by clearing small debts quickly. If the interest-cost difference is small, the snowball's momentum may help you actually finish. This calculator shows both side by side so you can weigh the money saved against the motivation factor.
How does extra payment speed things up?
Every extra rupee or dollar above your minimums goes straight to principal on the target debt, which cuts the interest that would have accrued on it. Because the freed-up minimums from cleared debts also roll into the next one, the extra payment snowballs over time. Even a small consistent extra amount can shave years off your payoff.
Should I pay off debt or invest first?
Generally, pay off high-interest debt like credit cards before investing, because few investments reliably beat 20 to 40% interest. For low-interest debt, you might invest alongside paying it down. Keep a small emergency fund first so a surprise expense does not push you back onto the cards.
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