Debt Payoff Calculator
Compare snowball vs. avalanche methods to pay off debt faster
Your Debts
Balance Over Time
Strategy Comparison
With a single debt, all strategies produce the same result
Payoff Order
| # | Name | Month | Interest |
|---|---|---|---|
| 1 | Credit Card | 24 | $1,611 |
Debt Snowball vs. Debt Avalanche
This debt payoff calculator compares snowball and avalanche strategies side by side in real time. The debt avalanche method targets the debt with the highest interest rate first, regardless of balance size. Mathematically, this minimizes total interest paid. The debt snowball method targets the smallest balance first, giving you quick psychological wins that fuel motivation.
Research from the Harvard Business Review found that consumers who focused on small wins were significantly more likely to persist and eliminate all their debt. The best strategy is the one you actually follow through on — use the calculator above to see the exact dollar difference for your debts.
The Debt Rollover Effect
When you pay off one debt, its freed-up minimum payment rolls into the next target. This creates a growing payment that accelerates every month. A $150 minimum payment that frees up becomes $150 of extra firepower on the next debt — and the effect compounds as each account is eliminated.
This rollover mechanism is the engine behind both snowball and avalanche strategies. The key insight: the sooner you eliminate a debt (freeing its minimum), the faster the remaining debts fall.
Why Extra Payments Matter More Than Strategy Choice
The difference between avalanche and snowball is often surprisingly small — typically $300-$1,500 over a multi-year payoff. The far bigger lever is making extra payments at all. On $25,000 of mixed-rate debt, an extra $200/month can save $6,000+ in interest and cut 3-4 years off your timeline.
Even $50 extra per month makes a meaningful difference. Use the slider above to find the sweet spot for your budget — you'll see the exact savings for every amount.
Frequently Asked Questions
- What is the difference between debt snowball and debt avalanche?
- The debt avalanche method pays off the highest interest rate debt first, minimizing total interest paid. The debt snowball method pays off the smallest balance first, providing quick wins for motivation. Both use the same rollover mechanic — when one debt is eliminated, its payment rolls into the next target.
- Which debt payoff strategy saves the most money?
- The avalanche method always saves the most (or equal) on total interest, because it eliminates the most expensive debt first. However, the difference between avalanche and snowball is often smaller than expected — typically $300-$1,500 over a multi-year payoff. The strategy you stick with matters more than the strategy you choose.
- How much extra should I pay each month to pay off debt faster?
- Even $50-$100 extra per month can make a significant impact. On $25,000 of mixed-rate debt, an extra $200/month can save $6,000+ in interest and cut years off your timeline. Use this calculator to model different extra payment amounts and find the sweet spot for your budget.
- What is the debt rollover effect and why does it matter?
- When you eliminate a debt, you no longer need to make its minimum payment. That freed-up money rolls into your next target debt, creating an ever-growing payment amount. This snowballing effect is the engine that makes accelerated payoff strategies so powerful — each cleared debt makes the next one fall faster.
- How long will it take to pay off my debt?
- It depends on your total balances, interest rates, minimum payments, and how much extra you can contribute. Enter your debts into this calculator to see the exact month you will be debt-free under each strategy. Most people with $15,000-$30,000 in mixed debt can be debt-free in 2-4 years with $200-$400/month in extra payments.
- Should I pay off debt or invest my extra money?
- Compare the interest rate on your debt to your expected investment return after taxes. Credit card debt at 20%+ almost always wins the payoff-first argument. Low-rate mortgage debt (under 4-5%) may favor investing if you have decades until retirement. Use this calculator to see how fast you can become debt-free, then model long-term growth with our Compound Interest Calculator.