Debt Snowball Calculator: Pay Off Smallest Balance First
The debt snowball is the motivational approach to paying off multiple debts. Instead of targeting the highest interest rate first, you focus on the smallest balance, regardless of rate. When that debt is gone, you roll its payment onto the next smallest, and so on. The sequence of quick wins keeps you engaged with the plan, which research suggests is often more important than the mathematically optimal approach. This calculator simulates the snowball strategy across up to five debts. Enter each debt's name, balance, annual interest rate, and minimum payment, along with any extra monthly amount you can put toward debt. The calculator runs the snowball simulation month by month, lists the order in which your debts will be paid off, and totals the interest you will pay. For context, it also runs the debt avalanche (highest rate first) and shows the additional interest cost of choosing the snowball approach. For most people with similar interest rates across debts, the difference is modest. For those with a large spread in rates, the comparison helps quantify the trade-off between math and motivation.
Enter up to 5 debts. Leave name blank to skip a row.
| Debt name | Balance ($) | APR (%) | Min. payment ($) |
|---|---|---|---|
Formulas
Snowball order: sort debts by balance ascending (smallest first).
Each month: apply interest (balance x APR / 12) to each debt.
Pay minimum on all debts. Apply extra payment to the snowball target.
When a debt reaches $0, roll its minimum payment into the extra pool.
Repeat until all balances reach $0.
Total interest = sum of all interest charges across all months.
Avalanche: same simulation but sort by APR descending (highest rate first).
Interest saved = minimum-only total interest minus snowball total interest.
How to use this calculator
- Enter the name, current balance, annual interest rate, and minimum monthly payment for each debt you carry.
- Leave the name blank (or balance at zero) for any rows you do not need.
- Enter any extra monthly amount you can consistently apply above your minimums.
- Read the payoff order, the total months to debt-free, and the interest totals from the output panel.
- Compare the snowball and avalanche interest figures. If the gap is large, consider whether the avalanche is worth the extra discipline for your situation.
Frequently asked questions
What is the debt snowball method?
The debt snowball directs extra monthly payments to the debt with the smallest outstanding balance first, regardless of interest rate. Once that debt is eliminated, its payment rolls onto the next smallest balance. The strategy was popularized by Dave Ramsey and is based on the psychological benefit of quick wins.
Does the snowball save more money than the avalanche?
No. The avalanche (highest rate first) always pays equal or less total interest than the snowball. The snowball trades interest cost for motivation: clearing small balances quickly provides a sense of progress. Studies suggest people who need psychological reinforcement stick with the snowball longer and ultimately pay off more debt.
How do I choose between snowball and avalanche?
If the rate difference between your debts is small, choose whichever motivates you more. If one debt has a dramatically higher rate (say 29% vs 8%), the avalanche saves significantly and is worth the discipline. You can also run both calculators and compare the total interest difference to see if the snowball's extra cost is acceptable to you.
Can I mix the two methods?
Yes. Some people pay off their one or two smallest balances first (for motivation), then switch to the avalanche for the remaining higher-rate debts. This hybrid approach is sometimes called the "blizzard" method.
What if two debts have the same balance?
If two debts have identical balances, direct extra payments to the one with the higher interest rate first. This is a minor optimization within the snowball framework that costs you nothing in motivation (the balances are the same) but saves some interest.
Official sources
- CFPB: Strategies for paying off debt: consumerfinance.gov/consumer-tools/debt-repayment/.
- FTC: Coping with Debt: consumer.ftc.gov/articles/coping-debt.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.