The debt avalanche method explained
Highest interest rate first, balance size ignored. Drag the slider to see how one rate decides the whole order.
Avalanche order
- 21% Credit card $3,000
- 9% Student loan $8,000
- 6.5% Car loan $6,000
$1,999 interest · 31 months
Snowball order
- 21% Credit card $3,000
- 6.5% Car loan $6,000
- 9% Student loan $8,000
$2,082 interest · 31 months
The avalanche saves $83. Push the student loan above 21% and it jumps to the front of the avalanche, even though it’s the biggest balance.
How to use the avalanche
- Find the APR of every debt on your latest statements.
- Sort them highest APR to lowest.
- Pay minimums on all and put everything extra on the top one.
- When it’s gone, roll its full payment to the next rate down.
What the slider shows
Balances don’t decide the avalanche order; only rates do. At a low student-loan rate, the loan waits behind the credit card and both methods may produce nearly the same plan. As its rate climbs past the card’s 21%, the avalanche moves it to the front, while the snowball keeps it last because it’s the largest balance, and the gap in interest grows.
That’s the general rule: the avalanche saves the most when your biggest debts also carry your highest rates. When your small debts are the expensive ones, the two methods converge.
Pros and cons
What it does well
- Lowest total interest for a given monthly budget
- Often finishes a month or two sooner
- Tackles the debt that grows fastest
What to watch
- First payoff can take a long time
- Needs discipline without early wins
- Re-sort if a promo rate ends or a rate changes
Plug in your own debts in the debt avalanche calculator, or see both methods race in the snowball vs avalanche comparison.
Questions people ask
What is the debt avalanche method?
A payoff strategy where you pay minimums on all debts and put every extra dollar toward the debt with the highest interest rate. When it’s paid off, you roll that payment to the next-highest rate, and so on.
Why is the avalanche cheaper?
Interest is charged as a percentage of each balance. A dollar sitting on a 25% card costs you 25 cents a year; a dollar on a 6% loan costs 6 cents. Paying off the expensive dollars first means less interest accrues every month for the rest of the plan.
Is the avalanche the same as the “debt stacking” method?
Yes. Debt stacking, the ladder method and highest-interest-first are other names for the same approach.
What if my highest-rate debt is huge?
The avalanche can feel slow when the first target is large. Some people start with one tiny debt for a quick win and then switch to rate order. The cost of that detour is usually small; compare it in the snowball vs avalanche calculator.
Should I use APR or interest rate?
Use the APR shown on your statement. For credit cards, the purchase APR is what applies to most balances; if part of a balance is at a cash-advance or promotional rate, use the rate for the bulk of it.