Debt Snowball vs Avalanche Calculator

What Are the Debt Snowball and Debt Avalanche Methods?

Both methods work the same basic way: you make the minimum payment on every debt you owe, then put any extra money toward one target debt at a time. The difference is entirely in how you choose that target.

The debt snowball method targets your smallest remaining balance first, no matter what interest rate it carries. Once that debt is gone, its minimum payment rolls into the extra amount you put toward the next-smallest balance, and so on. This method is built around momentum — clearing a full debt quickly can make a long payoff plan feel more manageable.

The debt avalanche method targets your highest interest rate first, regardless of balance size. Because high-interest debt costs you the most every month it sits unpaid, clearing it first generally reduces the total interest you pay over the life of your payoff plan.

How This Calculator Works

This calculator runs a month-by-month simulation rather than a simplified formula. Each month, interest accrues on every remaining balance, minimum payments are applied, and any leftover budget — your extra payment plus the minimum payments freed up from debts you've already paid off — is applied to your current target debt. The target order is fixed at the start: smallest balance to largest for snowball, highest rate to lowest for avalanche.

The simulation runs separately for each strategy using the same debts and the same total monthly budget, so the comparison reflects the actual difference the order makes — not a rough estimate.

Worked Example

Say you have three debts: a $2,000 credit card at 24% APR with a $60 minimum, a $9,000 car loan at 6.5% APR with a $250 minimum, and a $5,000 personal loan at 14% APR with a $150 minimum. You can put $200 extra toward debt each month.

Run your own numbers above to see your actual months-to-debt-free and total interest for each strategy — the gap depends entirely on your specific balances and rates.

Debt Snowball vs Debt Avalanche: Which Should You Choose?

If minimizing total interest paid is your main goal, debt avalanche is generally the stronger mathematical choice. If staying motivated and consistent is your biggest challenge, debt snowball's early wins may help you stick with the plan longer than a purely rate-based order would. Some people also use a hybrid: start with one or two small debts for momentum, then switch to avalanche order for the rest. This calculator shows you exactly what the snowball approach costs in extra interest and time compared with avalanche, so you can decide with real numbers instead of a guess.

How to Use This Calculator