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How the Debt Avalanche Method Works

The debt avalanche method is the mathematically optimal way to pay off debt. You list all your debts from highest interest rate to lowest, pay minimums on everything except the highest-rate debt, and throw every spare penny at that one until it's gone.

Once the highest-rate debt is eliminated, you roll its entire payment into the next-highest-rate debt. Because you're always attacking the most expensive debt first, you minimise the total interest you pay over the life of your repayment.

Step-by-Step: Using the Avalanche Method

1. List all your debts — credit cards, car loans, student loans, medical bills, personal loans.
2. Sort by interest rate, highest to lowest. Ignore balances.
3. Pay minimums on every debt except the one with the highest APR.
4. Put all extra money toward the highest-rate debt.
5. When it's gone, roll that payment into the next-highest-rate debt.
6. Repeat until you're debt-free.

Why the Avalanche Method Saves You Money

Interest compounds. A credit card at 24% APR costs you far more per month than a car loan at 5%. By eliminating the highest-rate debt first, you stop the most expensive bleeding as quickly as possible. The result: less total interest paid, and often a faster overall payoff.

The trade-off is patience. If your highest-rate debt also has the largest balance, it may take months before you see your first debt disappear. That's where the snowball method has an edge — it gives you faster psychological wins.

Avalanche vs Snowball: Which Should You Choose?

If you have a wide spread in interest rates (e.g., 5% to 25%), the avalanche method can save you hundreds or thousands in interest. If your rates are all similar, the difference is minimal and you might prefer the snowball method for its motivational benefits.

Not sure? Try the Payoff app — it includes a 60-second strategy quiz that recommends the best method for your personality and debt profile. You can also compare both methods side-by-side with the what-if simulator.