Debt Avalanche Calculator — Payoff by Highest Rate First
Payoff Order (highest rate first)
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Total Months to Debt-Free
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Total Interest Paid
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How the Debt Avalanche Method Works
The debt avalanche method prioritizes debts with the highest interest rates first. You make minimum payments on all debts and direct all extra payments toward the highest-rate debt. When it is paid off, the freed-up payment flows to the next highest rate.
This is the mathematically optimal approach because it minimizes total interest paid over the life of your debts. High-interest debts (like credit cards at 18-25%) cost you the most, so eliminating them first saves the most money.
The challenge is psychological: if the highest-rate debt also has a large balance, it can take months to see progress. This is why some people prefer the snowball method despite paying more interest. The best method is the one you will actually follow through with.
Frequently Asked Questions
How much interest does the avalanche method save?
Compared to the snowball method, the avalanche typically saves $500-5,000 in interest depending on total debt, rate differences, and payoff timeline. The larger the rate spread, the more you save.
What if two debts have the same interest rate?
If rates are equal, pay off the smaller balance first (combine avalanche and snowball). This gives you a quicker win without any interest cost penalty.
Should I refinance high-interest debt instead?
If possible, yes. Balance transfer cards (0% intro APR), personal loans, or debt consolidation can lower rates significantly. Then use the avalanche method on the remaining debt.