Debt Avalanche Calculator
List your debts and see how fast — and how cheaply — the avalanche method can make you debt-free by attacking the highest interest rate first.
Applied to the targeted debt each month.
| # | Debt | Paid off in |
|---|---|---|
| 1 | Credit Card 1 | 1 yr 6 mo |
| 2 | Credit Card 2 | 2 yr 1 mo |
| 3 | Personal Loan | 3 yr 3 mo |
How it works
- 1Add each of your debts
Include balance, APR, and minimum payment.
- 2Set your extra monthly budget
Whatever you can afford on top of minimums.
- 3See total interest saved
Avalanche targets your highest APR first to crush the most expensive interest.
The debt avalanche is the mathematically optimal payoff strategy. By targeting your highest interest rate first, you minimize the total interest paid over the life of all your debts.
How it works: you pay the minimum on every debt to stay current. Every extra dollar you can afford goes to whichever debt has the highest APR — regardless of balance. When that one's gone, you redirect all those dollars (minimum + extra) to the debt with the next-highest APR.
Avalanche is the right choice when your highest-APR debt is significantly more expensive than the rest — for example, a 24% credit card alongside 6% student loans. The interest savings can be hundreds or thousands of dollars compared to the snowball method.
The trade-off: your first debt may take longer to pay off than it would under snowball (especially if it's also your largest), so you don't get a quick visible win. If motivation is your biggest barrier, snowball may serve you better even though it costs slightly more.
Example scenarios
Avalanche usually saves $500–$1,500 vs snowball on a 3–5 year payoff.
If you have a single 25% APR card, avalanche is overwhelmingly worth it — possibly thousands saved.
The savings shrink to a few hundred dollars; pick the method you'll stick with.
Common questions
What is the debt avalanche method?
Pay the minimum on every debt, then send every extra dollar to the debt with the highest APR. Once it's gone, attack the next-highest APR. Avalanche minimizes total interest paid.
Is avalanche better than snowball?
Mathematically, yes — avalanche almost always saves more interest. But the difference is usually a few hundred dollars on typical debt, and snowball's quick wins win out for people who need momentum.
What if two debts have the same APR?
Tie-break on balance — pay the smaller one first to free up its minimum payment sooner. Either choice produces nearly identical totals.
Does APR mean the same as interest rate?
For credit cards, yes — APR is the interest rate. For installment loans, APR includes fees, which makes it slightly higher than the stated interest rate. Use APR for avalanche prioritization.