Debt snowball puts extra money toward the smallest balance. Debt avalanche puts it toward the highest APR. With either method, keep paying the required minimums on every other account and roll freed payments into the next debt.
What changes between the two methods?
| Question | Debt snowball | Debt avalanche |
|---|---|---|
| Where does the extra payment go? | The account with the smallest starting balance. | The account with the highest interest rate. |
| What happens to the other debts? | Continue their required minimum payments. | Continue their required minimum payments. |
| What is the main benefit? | May eliminate a small account sooner, giving a visible milestone. | Usually reduces total interest by attacking the most expensive rate first. |
| What is the tradeoff? | A larger, higher-rate balance can accrue interest while you clear smaller debts. | A large high-rate account can take longer to eliminate, even while its balance falls. |
| What happens after payoff? | Keep the total monthly debt budget steady and send the freed payment to the next target. | |
The CFPB explains both strategies and the tradeoff between early progress and focusing on expensive interest.
A worked example: $7,000 of debt and $335 a month
Suppose these are three separate accounts. Their minimums total $185, and the household can put another $150 toward debt each month.
| Account | Balance | APR | Monthly minimum |
|---|---|---|---|
| Small balance | $500 | 10% | $25 |
| High-rate card | $2,000 | 24% | $60 |
| Larger balance | $4,500 | 16% | $100 |
In month one, snowball pays $175 to the small balance, $60 to the high-rate card and $100 to the larger balance. Avalanche pays $25, $210 and $100 respectively. Both spend exactly $335.
| Result | Snowball | Avalanche |
|---|---|---|
| First account paid off | Month 3 | Month 11 |
| All debts paid off | 26 months | 25 months |
| Total interest | $1,391.41 | $1,329.01 |
| Total payments | $8,391.41 | $8,329.01 |
Here, avalanche saves $62.40 and finishes one month earlier; snowball provides an earlier first payoff. This example is not a forecast of your savings. The difference changes with account rates, balances and the amount available each month.
Try this example or enter your debts
How to carry out either plan
- Protect essentials and required payments. Budget for housing, utilities, food and other necessary expenses before choosing an extra debt payment.
- List each separate account. Use current balances, APRs and statement minimums. Two rates on one credit card are not necessarily two independently payable accounts.
- Choose a sustainable extra amount. A budget you can repeat matters more than an aggressive one that causes new borrowing.
- Pay the minimums, then the target. When the target is cleared, roll its payment into the next debt instead of reducing your total budget.
- Recheck every statement cycle. Update rates, minimums and balances; confirm how your creditor applied extra payments.
When the rate or balance should not be the only priority
Late housing or utility bills, secured debts at risk of repossession, court notices, and expiring deferred-interest promotions can have consequences this calculator does not model. Address urgent deadlines and verify terms before applying a simple ranking rule. If the minimums are unaffordable, contact creditors about hardship options rather than treating a payoff-order calculator as a solution to the budget gap. See CFPB guidance on an unaffordable credit-card bill.
Also consider cash reserves. Sending every available dollar to a card can leave the next unexpected expense unfunded. Our emergency-fund-versus-debt guide explains how to compare that tradeoff.
Common questions
Does avalanche always finish faster?
It often saves interest under constant rates and the same payment budget, but both strategies can finish in the same month. Promotional terms, fees, changes in behavior and actual payment timing can change the comparison. Use the full schedule, not a blanket savings claim.
Can snowball and avalanche produce the same result?
Yes. They use the same order when the smallest balances also have the highest rates. With just one debt, there is no priority choice, so this calculator produces the same schedule.
Does either method guarantee a credit-score increase?
No. This comparison estimates balances, interest and payments. It does not model credit scores or account reporting.
Example assumptions
Rates and entered minimums stay fixed; no fees or new purchases are added. Interest is APR divided by 12, applied monthly to each opening balance and rounded to cents. Payments occur after interest. Unused payment money rolls to the next target in the same month. See the complete methodology and limits.
Sources and further reading
Choose a method, then carry it out
Use current statements to compare both strategies with the same monthly budget.
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