Debt Snowball vs Avalanche Calculator
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Debt snowball calculator and debt avalanche calculator: payoff date, interest and order for your debts, snowball vs avalanche, and the price of a quick win.
Educational estimate only. Not a lending decision. Your numbers stay in this browser.
Results
How to read this: the verdict describes how much room your numbers leave, not a decision or an offer. Change any input to see how much the result moves.
Debt payoff guides
These guides explain payoff timelines, minimum payments, balance transfers, and consolidation tradeoffs.
- How to pay off credit card debt
- Fixed payment vs minimum payment
- Balance transfer fee explained
- Debt consolidation pros and cons
For all guide topics, open Guides. For source and estimate boundaries, read Calculation Methodology and Sources and Assumptions.
Assumptions and formula
Each month every debt is charged interest at its APR ÷ 12 and every minimum is paid. Whatever is left of your budget goes to the first unpaid debt in the order: smallest balance first for the snowball, highest APR first for the avalanche. When a debt is cleared, its minimum joins the budget for the next.
The same debts are also run on minimums alone, to show what the extra payment saves. Months to debt-free, total interest and the month each debt is cleared are compared, along with how much sooner the snowball clears its first debt. A minimum at or below a month’s interest is flagged, because that debt would never shrink on its own.
Worked example
A $1,200 store card at 19.99%, a $7,500 Visa at 26.99%, a $4,000 personal loan at 11.5% and a $9,000 car loan at 7.9%, with $675 of minimums and $250 extra: the avalanche is debt-free in 28 months with $3,911 of interest; the snowball takes 29 months and $4,583, but clears the store card in month 5 against the avalanche’s first payoff in month 20. On minimums alone it takes 63 months and $8,898.
Frequently asked questions
How much does the snowball’s quick win cost?
In the example on this page, $672 of extra interest for clearing the first debt 15 months sooner. With other debts the gap can be nothing or thousands; the calculator shows yours.
What is the difference between the debt snowball and the debt avalanche?
The snowball pays off the smallest balance first for a quick win; the avalanche pays the highest interest rate first, which always costs the least. Both pay every minimum and roll each cleared payment into the next debt.
Which saves more money, snowball or avalanche?
The avalanche, or the same when the smallest debt also has the highest rate. On $21,700 across four debts with $250 extra a month, it saves $672 and finishes a month sooner.
Why would anyone choose the snowball?
Motivation. In the same example the snowball clears its first debt in 5 months; the avalanche’s first payoff takes 20. If the early win keeps you paying, it can be worth the extra interest.
How much does paying extra save?
In the example, paying $250 a month above the $675 of minimums cuts the payoff from over 5 years to 28 months and saves about $4,986 of interest.
What if my minimum payment does not cover the interest?
Then that debt grows on minimums alone. The calculator flags it; paying more on it, or a lower rate through a balance transfer or consolidation loan, is needed.
Is this a debt payoff calculator?
Yes: a debt payoff calculator with a debt snowball calculator and a debt avalanche calculator, comparing snowball vs avalanche on your own debts.
Is this a snowball method calculator?
Yes: a debt snowball planner using the snowball method (smallest balance first), shown next to the avalanche, so you can see how fast each plan pays down your debt.
Sources
Sources reviewed 4 October 2026: checked against their current editions on that date.
- Arithmetic only: monthly interest at APR ÷ 12, minimums first, remaining budget to the target debt, cleared payments rolled over.
This page is an educational estimate, not personal financial or tax advice. Eligibility and individual circumstances can change the result.