Debt Payoff Calculator
Compare Snowball and Avalanche strategies to find the fastest and cheapest way to become debt-free.
Total of minimum payments shown above. Add extra to accelerate your payoff.
How the Debt Payoff Calculator Works
Two main strategies help you decide which debt to tackle first:
Snowball Method: Pay off the smallest balance first. You get quick wins that keep you motivated. When each debt is paid off, you roll its minimum payment into the next debt on your list.
Avalanche Method: Pay off the highest interest rate first. This saves the most money over time because you eliminate high-cost debt sooner. When each debt is paid off, the freed-up payment accelerates the next one.
Worked Example — Snowball vs Avalanche
Scenario
Maria has three debts and $300 per month to put toward them.
| Debt | Balance | Rate | Min Payment |
|---|---|---|---|
| Small Personal Loan | $1,000 | 12% | $25 |
| Credit Card | $2,500 | 20% | $60 |
| Car Loan | $5,000 | 6% | $120 |
Snowball Strategy
- Targets the Small Personal Loan first (smallest balance, $1,000)
- Paid off in 9 months — a quick psychological win
- Then targets the Credit Card, then the Car Loan
- Debt-free in ~2 years 9 months
- Total interest paid: ~$1,256
Avalanche Strategy
- Targets the Credit Card first (highest rate, 20%)
- Paid off in 19 months
- Then targets the Small Personal Loan, then the Car Loan
- Debt-free in ~2 years 9 months
- Total interest paid: ~$1,136
Interpretation
The Avalanche method saves Maria approximately $120 in interest over the life of her debts — a full month of payments. However, Snowball gives her a psychological victory much sooner. The Small Personal Loan is gone in 9 months with Snowball, while Avalanche takes 19 months to eliminate the first debt. Which strategy is better depends on whether Maria values maximum savings or early motivation to stay the course.
Practical Advice
- Snowball is often more effective for people who struggle with motivation — the quick wins keep you going.
- Avalanche is mathematically optimal — if you can stay disciplined, it saves the most money.
- Minimum payments are traps — paying only the minimum on high-interest debt can keep you in debt for years.
- Debt snowflakes help — even small extra payments ($5–$10) accelerate progress.
- Do not close paid-off cards immediately — closing accounts can hurt your credit utilisation ratio.
💡 Next Decision
If you are motivated by quick wins: Use the Snowball method. Pay the minimum on all debts, then put every extra pound toward the smallest balance.
If you want to save the most money: Use the Avalanche method. Pay the minimum on all debts, then put every extra pound toward the highest-interest debt.
If your minimum payments exceed your budget: Consider debt consolidation, negotiating with creditors, or speaking to a debt advisor. Use our Loan Calculator to compare consolidation options.
Frequently Asked Questions
Can I switch strategies halfway?
Yes. The best strategy is the one you stick with. If Snowball keeps you motivated, use it. If you want to save more interest later, switch to Avalanche. Any structured plan is better than no plan.
What if I have debts with similar rates?
Pay off the smaller balance first (a hybrid approach). The interest difference is marginal, and the psychological win helps. The calculator above will show you the exact difference.
Should I invest or pay off debt?
Generally, pay off debt with rates above 6–8% before investing. Your debt’s interest rate is a guaranteed “return” on paying it off. Use the Compound Interest Calculator to compare.
What about debt consolidation?
Consolidation can help if it lowers your overall rate, but only if you do not run up new debt. Use the Loan Calculator to compare consolidation loan options against your current plan.
Pro Tips
- The debt snowflake: Round up every payment. Send the spare change to your target debt. It adds up.
- One bonus = one leap: Put tax refunds, bonuses, or gifts toward your target debt to accelerate progress significantly.
- Automate the minimum: Set up automatic minimum payments on all debts, then manually direct extra payments to your target.
- Related calculators: Use the Loan Calculator for consolidation planning, the Compound Interest Calculator to compare investing vs paying off debt, and the Savings Goal Calculator to plan your next financial goal after becoming debt-free.
Related Tools
- Use our Loan Calculator to compare consolidation options
- Use our Compound Interest Calculator to see investing vs paying off debt
- Use our Savings Goal Calculator to plan your next goal after debt freedom
- Explore all our financial tools on the Personal Finance Hub