Debt Avalanche Calculator
Attack your highest-interest debt first and save the most money. Our free calculator shows you exactly how much interest you'll save with the avalanche method.
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What Is the Debt Avalanche Method?
The debt avalanche method is a debt repayment strategy where you pay off debts in order of highest interest rate to lowest. You make minimum payments on everything, then direct every extra dollar at the debt with the highest APR.
When that high-rate debt is eliminated, you roll the freed-up payment into the next highest-rate debt. This is the mathematically optimal approach — it minimizes the total interest you pay over the life of your debts.
For people with high-interest credit card debt (18%–30% APR), the avalanche method can save hundreds or even thousands of dollars compared to other approaches.
How the Avalanche Method Works
List all your debts by interest rate (highest first)
A 24.99% credit card comes before a 6.5% student loan, regardless of balance size.
Pay minimums on everything except the highest-rate debt
Keep all accounts in good standing while concentrating firepower on the most expensive debt.
When the highest-rate debt is gone, move to the next
Your freed-up payment rolls into the next highest-rate debt, increasing your payoff speed.
Repeat until debt-free
Every high-rate debt you eliminate reduces the total interest accruing across your portfolio. The savings compound over time.
Why Choose the Avalanche Method?
Avalanche (Highest Rate First)
- + Pays the least total interest
- + Mathematically optimal
- + Often faster debt-free date
- - First payoff can take longer
Snowball (Smallest First)
- + Quick early wins
- + Easier to stay motivated
- - Pays more interest overall
- - May take longer to finish
The avalanche method is ideal for disciplined savers who are motivated by the numbers. If you can stay focused even when the first debt takes months to eliminate, you'll come out ahead financially.
Our calculator runs both strategies side-by-side and shows you the exact dollar difference so you can make an informed choice.
Avalanche in Action: An Example
Say you have three debts:
| Debt | Balance | APR | Min Payment |
|---|---|---|---|
| Credit Card A | $8,000 | 24.99% | $200 |
| Car Loan | $12,000 | 6.5% | $350 |
| Student Loan | $5,000 | 4.5% | $100 |
With the avalanche method, you'd attack the 24.99% credit card first — even though the car loan has a higher balance and the student loan has a lower balance. Every dollar of interest you prevent on that 25% card is money back in your pocket.
Frequently Asked Questions
How much interest will I save with the avalanche method?
It depends on your specific debts. The bigger the gap between your highest and lowest interest rates, the more you save. Our calculator shows the exact dollar difference between avalanche and snowball for your debts.
What if my highest-rate debt is also my largest?
This is common with credit cards. It means your first payoff will take longer, but you're saving the most money possible. Stay focused — the payoff accelerates once that big one is gone.
Can I use avalanche and add one-time payments?
Yes. Our calculator has a "snowflake payments" feature where you can add lump sums (tax refunds, bonuses) at specific months. These go toward your highest-rate debt for maximum impact.
What if two debts have the same interest rate?
When rates are tied, our calculator targets the smaller balance first (a hybrid approach). This gives you the quick win without sacrificing any interest savings.
See How Much You'll Save
Enter your debts and watch the avalanche crush your interest charges. Free, private, no account needed.
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