Debt Snowball Calculator

The debt snowball method puts your debts in order from smallest balance to largest. You make minimum payments on everything except the smallest debt. Every extra dollar goes at that smallest balance until it is gone.

When the first debt is paid off, you take its entire payment and add it to the minimum payment on the second-smallest debt. This is the rollover. Your monthly payment total stays the same, but one debt at a time is hit with a larger and larger payment.

The snowball builds momentum. Your second payoff comes faster than the first. Your third payoff comes even faster. By the time you reach the last debt on your list, you are making a payment that may be three to five times bigger than what that debt's original minimum was.

Financial math says the avalanche method saves more money. But financial behavior research tells a different story.

A 2012 study in the Journal of Marketing Research found that consumers who focused on paying off one account at a time — rather than spreading payments across all debts — were significantly more likely to reach full debt freedom. The study found that the sense of completion from paying off an individual debt was a stronger motivator than abstract interest savings.

Put simply: a plan you follow is better than a perfect plan you quit.

The snowball works for people who need to feel progress. If your smallest debt is $800 and you can throw $200 extra per month at it, that debt is gone in four to five months. That is a real win. That win creates energy to attack the next debt.

If you have strong financial discipline and can stay focused on a long-term goal, the debt avalanche calculator may save you more money. But if motivation is the challenge, the snowball is the right tool.

Enter each debt you owe. Include the balance, interest rate, and minimum payment. Enter any extra monthly amount you can put toward debt above and beyond all minimums combined.

The calculator sorts your debts automatically from smallest balance to largest. It calculates the exact month each debt is paid off. It applies the rollover payment to the next debt on the list. It shows you your total payoff date and total interest paid.

You can compare this result to the debt avalanche calculator to see which method saves more money in your specific situation.

Here is a real example to show how the snowball method works:

Total minimums: $485. Extra payment: $200. Total monthly toward debt: $685.

Snowball order: Medical bill first ($850 at 0%), then store card, then credit card, then personal loan, then car loan.

• Month 4: Medical bill paid off. $50 rolls to store card, which now gets $285.
• Month 11: Store card paid off. $285 rolls to credit card, which now gets $370.
• Month 27: Credit card paid off. $370 rolls to personal loan, which now gets $500.
• Month 43: Personal loan paid off. $500 rolls to car loan.
• Month 51: Car loan paid off. Debt-free.

Total time: 51 months instead of 11+ years on minimums. Total interest saved: approximately $8,200.

The key was the $200 extra payment applied to the smallest balance first. That launched the snowball.

More is better, but start where you are.

Even $50 per month extra makes a real difference on the snowball. At $50 extra on the example above, total payoff takes 67 months instead of 51. At $300 extra, total payoff drops to 41 months.

Find any extra you can. Pause a subscription. Skip two restaurant meals per week. Sell items you no longer use. Apply your tax refund directly to the smallest debt.

Use the credit card payoff calculator to see the impact of extra payments on individual high-rate balances. Use the loan payoff calculator for installment debts with fixed terms.