Debt avalanche and debt snowball use the same basic budget. You make every required minimum, send all extra money to one target, and roll a paid-off account's former payment into the next debt. Only the target order changes. Avalanche chooses the highest annual percentage rate; snowball chooses the smallest balance.
The example debts and monthly budget
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Store card | $1,200 | 18% | $40 |
| Credit card | $4,000 | 24% | $120 |
| Personal loan | $7,500 | 9% | $190 |
The minimums total $350. Assume the borrower can add $250, making the fixed payoff budget $600 per month. For a transparent illustration, monthly interest is estimated as opening balance × APR ÷ 12. Actual lenders may accrue interest daily and calculate minimums differently.
What happens in month one
Both methods first cover all minimums. Avalanche sends the extra $250 to the 24% credit card, so that card receives $370. Snowball sends the extra to the $1,200 store card, so it receives $290. The total payment is still $600 either way.
| Method | Store card | Credit card | Loan |
|---|---|---|---|
| Avalanche payment | $40 | $370 | $190 |
| Snowball payment | $290 | $120 | $190 |
Avalanche reduces the balance charging 24% sooner. Snowball is likely to close the $1,200 account sooner. That earlier closure does not create extra budget—the method works only if its $40 minimum is rolled forward instead of being spent.
Why avalanche costs less in the model
A dollar applied to 24% debt prevents more next-period interest than a dollar applied to 18% or 9% debt. Repeating that choice minimizes interest when rates and payments behave as assumed. Snowball knowingly gives up some mathematical efficiency to produce an earlier visible payoff. The closer the rates and the smaller the balances, the smaller that trade-off may be.
When the simple ranking can mislead
- A promotional APR expires before the projected payoff date.
- A loan has a prepayment penalty or unusual interest rules.
- One account is delinquent, secured by essential property, or already in collections.
- The monthly budget cannot cover required minimums.
- Paying a balance would remove access to a benefit you urgently need.
Those situations can make account terms and immediate consequences more important than either ranking. Confirm payoff terms with the lender and seek qualified help when minimums are unaffordable.
A practical decision rule
- Enter statement balances, APRs, and minimums—not remembered estimates.
- Run both methods with one sustainable total monthly budget.
- Compare payoff dates, total interest, and the first account-closure date.
- If the cost gap is meaningful to you, choose avalanche.
- If the gap is modest and early closures help you persist, snowball is a defensible behavioral choice.
- Automate the total budget so freed minimums continue rolling forward.
Check authoritative help before paying a company
The U.S. Consumer Financial Protection Bureau provides a plain-language debt collection and response resource, while the Federal Trade Commission explains how to evaluate debt-relief and credit-counseling claims. Be cautious with companies that demand upfront fees or promise to make debt disappear. This worked example is a budgeting model, not a lender payoff quote or individualized credit advice.