Debt Payoff Calculator

1. Add your debts with name, balance, interest rate, and minimum payment.
2. Enter the extra monthly amount you can put toward debt payoff.
3. Compare the Avalanche (highest rate first) and Snowball (lowest balance first) methods.
4. Review payoff order, total interest, and payoff timeline for each strategy.
5. See how much money and time you save with extra payments.
6. Adjust extra payment amount to find a plan that fits your budget.

What Is a Debt Payoff Strategy?

A debt payoff strategy is a structured plan for eliminating multiple debts systematically rather than paying them down haphazardly. Without a strategy, borrowers often spread extra payments across all debts equally or pay extra only when they feel like it, which can be inefficient and discouraging. The two most popular debt payoff strategies are the Debt Avalanche and the Debt Snowball. Both use the same core principle: pay the minimum on all debts, then direct any extra money toward one specific target debt. When that debt is paid off, its freed-up minimum payment rolls into the next target, creating increasingly larger payments over time and accelerating the payoff process.

How the Avalanche and Snowball Methods Work

The Avalanche method targets the debt with the highest interest rate first, regardless of balance size. This is mathematically optimal because it reduces the total amount of interest accruing across your debt portfolio as quickly as possible. Each month, you pay the minimums on all debts and put every extra dollar toward the highest-rate balance. The Snowball method targets the debt with the smallest balance first, regardless of interest rate. You pay it off quickly, then roll that payment into the next smallest balance. This calculator simulates both strategies side by side so you can compare total interest paid, payoff timelines, and the order in which debts are eliminated.

Common Use Cases

• Creating a structured plan to pay off credit card debt
• Comparing Avalanche vs. Snowball strategies to see which saves more money
• Determining how much extra payment per month you need to become debt-free by a target date
• Visualizing the payoff order and timeline for multiple debts
• Calculating total interest savings from making extra payments beyond the minimums
• Motivating yourself by seeing the concrete impact of each extra dollar applied to debt

Debt Snowball vs. Debt Avalanche: Which Should You Choose?

The Avalanche method always saves more money in total interest paid because it prioritizes eliminating the most expensive (highest-rate) debt first. For someone with a $5,000 credit card at 22% APR, a $12,000 car loan at 6%, and a $3,000 personal loan at 10%, the Avalanche method would target the credit card first. This prevents the high-interest balance from growing while you focus on other debts. The interest savings over the Snowball method can range from a few hundred to several thousand dollars, depending on the balances and rate differences involved.

However, research from Harvard Business Review and other behavioral finance studies has shown that people using the Snowball method are more likely to stick with their plan and successfully eliminate all their debt. The quick wins from paying off smaller balances provide a psychological boost and a sense of progress that keeps borrowers motivated. In the example above, the Snowball method would target the $3,000 personal loan first, paying it off in just a few months and providing an early victory. The best strategy is the one you will actually follow through on. If you are highly disciplined, the Avalanche method maximizes your savings. If you need motivation from visible progress, the Snowball method may be the better choice.

Understand how loan amortization works with our Loan Calculator, see how freed-up payments can grow your wealth with the Savings Calculator, or plan your financial future with the Retirement Calculator.