Debt Snowball Calculator
Build momentum by eliminating your smallest debts first. See when each debt is paid off and your total interest cost.
How to Use This Debt Snowball Calculator
1. Enter Your First Debt. Fill in the Balance, Rate, and Min. Payment for your first debt.
2. Click "+ Add Debt" for Each Additional One. Repeat for every debt. Attack order is set by smallest balance, not highest rate.
3. Enter Your Extra Monthly Payment. Fill in how much extra you can put toward debt beyond your combined minimums.
4. Click Calculate. The calculator sorts debts from smallest balance to largest and simulates payments.
5. Read Your Results. Check the bar chart showing each debt's payoff month as your payment momentum builds.
Rachel is carrying three debts: a $2,500 personal loan at 11% interest ($80 minimum), a $5,000 car loan at 7% interest ($140 minimum), and a $7,000 credit card at 24% interest ($180 minimum). She has an extra $200 a month to put toward debt. Under the snowball strategy, her smallest debt — the personal loan — gets attacked first and clears in about 9 to 10 months, a quick first win that keeps her motivated. From there, the car loan clears around month 19, and the credit card — the one carrying the highest rate — finishes last, around month 30, with total interest across all three landing around $3,780. Curious, Rachel runs the same three debts through the avalanche method instead: total interest comes out to only about $2,770 — roughly $1,010 cheaper — but her first win wouldn't have arrived until month 23, since avalanche attacks the credit card (highest rate, biggest balance) first. What settles it for Rachel is realizing that $1,010 feels like a fair price to pay for a win at month 9 instead of waiting until month 23 and risking giving up along the way.
Key Terms
Balance
The remaining amount owed on each debt. In snowball, this number determines the attack order.
Rate
The annual interest rate (APR) on each debt, directly affecting total interest paid.
Min. Payment
The required monthly minimum for each debt, regardless of strategy.
Extra Monthly Payment
The amount beyond minimums, directed at the smallest balance first in snowball.
Payment Rolling
Once a debt clears, its entire payment shifts to the next-smallest balance in line.
Total Interest
The full amount of interest paid across every debt until completely debt-free.
The Price of Motivation: What Debt Snowball Actually Costs You in Extra Interest
Snowball and avalanche usually get framed as "which one is better," when the more useful question is: what does it actually cost you to choose motivation over math?
A Fast Win, But Not a Free One
Take a $2,500 personal loan (11%), a $5,000 car loan (7%), and a $7,000 credit card (24%), with $200 extra a month. Snowball delivers a first win in 9 to 10 months, but total interest lands around $3,780, compared to $2,770 under avalanche.
That $1,010 Gap Isn't Nothing, But It Isn't the Whole Story Either
That roughly $1,010 difference is real. But weigh it against how long the first win takes: avalanche wouldn't deliver a win until month 23. A lot of people give up before getting there.
Choose Based on What You Know About Yourself
If you know you need visible progress to stay consistent, $1,010 might be a fair price for a win at month 9 instead of month 23.