Debt Snowball vs Avalanche Calculator
Enter your debts and a monthly budget to see the snowball and avalanche side by side, with the months and interest each one costs.
Want to understand the concept, not just the number? Read Debt Snowball vs Avalanche .
How it's calculated
Both methods have you pay the minimum on every debt, then put every spare dollar toward one target debt until it is gone, then roll that payment onto the next. The only difference is which debt you target first. The snowball goes after the smallest balance, for quick wins that keep you motivated. The avalanche goes after the highest interest rate, which always costs the least in total interest.
Take the default here, a $8,000 credit card at 23 percent and a $4,000 personal loan at 8 percent, with $500 a month to spend. The snowball clears the smaller loan first and finishes everything in 32 months, paying $3,659.34 in interest. The avalanche attacks the 23 percent card first and finishes in 30 months, paying $2,847.62. That is $811.72 saved and two months faster, just by changing the order.
The avalanche is the mathematically cheaper choice every time, and the gap grows when your high-rate debt is large. The snowball can still win in practice if the early payoff of a small balance is what keeps you going. Try both with your own numbers. If the difference is small, pick the method you will actually stick with.
Assumptions
- Both methods pay every minimum, then apply the rest of your budget to one target debt, rolling freed-up payments onto the next as debts clear.
- Interest accrues monthly on each balance. Your budget is assumed to cover at least the total of the minimum payments.
Last updated: 2026-08-08
These assumptions follow our general methodology.
Frequently asked questions
Which is better, snowball or avalanche?
The avalanche always pays less total interest, because it clears your highest rate first. The snowball can be better in real life if wiping out a small balance early is what keeps you motivated. Enter your debts here to see the dollar difference, then choose.
What is the debt snowball method?
You pay the minimum on every debt and throw all spare money at the smallest balance first. When it clears, its payment rolls onto the next smallest, and the amount going to debt snowballs. It is built around momentum from quick wins.
What is the debt avalanche method?
You pay the minimum on every debt and throw all spare money at the highest interest rate first. It clears your most expensive debt soonest, so you pay the least interest overall. It is the cheaper method by the math.
Do I have to pay more than the minimums?
Yes, to make real progress. Paying only minimums on high-rate debt can drag on for years, since much of each payment goes to interest. Your budget here should be more than the total of the minimums, and the extra is what does the work. The Credit Card Payoff calculator shows this minimum-payment trap on a single card.
Does the order I list my debts matter?
No. The calculator sorts them for you, by balance for the snowball and by rate for the avalanche, so you can enter them in any order.