Debt Payoff Calculator
Compare snowball vs avalanche payoff strategies. See exactly when you'll be debt-free, how much interest you'll save, and the optimal payoff order for your debts.
Enter Your Debts
Balance Over Time
Payoff Order
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How to Use the Debt Payoff Calculator
Enter each of your debts with the current balance, interest rate (APR), and minimum monthly payment. Then add any extra money you can put toward debt each month. The calculator compares two proven strategies:
❄️ The Snowball Method
Pay off debts from smallest balance to largest. After one debt is eliminated, roll its payment into the next smallest. This method gives you quick wins that build momentum — research from Harvard Business School shows people are more likely to stay motivated and actually become debt-free using this approach.
🏔️ The Avalanche Method
Pay off debts from highest interest rate to lowest. This is mathematically optimal — you'll pay the least total interest. If your highest-rate debts also have small balances, you get the best of both worlds.
Which Method Should You Choose?
- Choose Snowball if you need motivation and quick wins, or if the interest rate difference between your debts is small (under 5%)
- Choose Avalanche if you're disciplined and want to minimize total interest paid, especially with high-rate credit card debt
- Compare both — sometimes the difference is only a few hundred dollars, making the psychological benefit of snowball worth it
Tips to Pay Off Debt Faster
- Automate payments — set up auto-pay for at least the minimum on every debt
- Find extra money — even $50-100 more per month makes a huge difference
- Use windfalls wisely — tax refunds, bonuses, and side income can accelerate payoff by months
- Consider balance transfers — 0% APR cards can eliminate interest on credit card debt for 12-21 months
- Don't add new debt — pause credit card spending while paying off existing balances
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Frequently Asked Questions
The debt snowball method pays off debts from smallest balance to largest, regardless of interest rate. You make minimum payments on all debts and put extra money toward the smallest balance. Once it's paid off, you roll that payment into the next smallest debt. This method provides quick psychological wins that keep you motivated.
The debt avalanche method targets debts with the highest interest rate first, regardless of balance. You make minimum payments on all debts and put extra money toward the highest-rate debt. This method saves the most money on interest over time, making it mathematically optimal.
The avalanche method saves more money on interest, while the snowball method provides faster psychological wins. Research from Harvard Business School found people using the snowball method are more likely to stick with their plan. The best method is the one you'll actually follow through with. Use this calculator to compare both and see the exact dollar difference.
Even an extra $50-100 per month can dramatically reduce your payoff time and interest paid. A good rule of thumb is to put at least 20% of your income toward debt repayment (including minimums). Use this calculator to model different extra payment amounts and find the sweet spot for your budget.
Yes, paying off debt typically improves your credit score. It reduces your credit utilization ratio (the percentage of available credit you're using), which accounts for about 30% of your FICO score. Paying on time also builds positive payment history, the largest factor at 35% of your score.
Most financial advisors recommend a balanced approach: first build a small emergency fund ($1,000-2,000), then aggressively pay off high-interest debt (above 7-8%), while making minimum payments on low-interest debt. Once high-interest debt is gone, build a full 3-6 month emergency fund, then tackle remaining debt. Always contribute enough to get an employer 401(k) match — that's free money.