Debt Payoff Calculator
Compare the snowball and avalanche methods to find the fastest, cheapest path to debt freedom.
Your Debts
Amount above minimum payments applied to target debt
Snowball vs Avalanche: Which Method Is Right for You?
Choose Snowball if…
- You need quick psychological wins
- You've struggled to stick to debt plans before
- Your interest rates are similar across debts
- Crossing things off a list motivates you
Choose Avalanche if…
- You have high-interest debt (credit cards at 20%+)
- You're disciplined and motivated by numbers
- Saving the maximum interest is your priority
- Your debts have very different interest rates
The Power of Extra Payments
Even a small extra payment dramatically shortens your payoff timeline and reduces interest. On $20,000 of debt at 18% APR with $400 minimum payments:
| Monthly Payment | Payoff Time | Total Interest | Interest Saved |
|---|---|---|---|
| $400 (minimum) | 9 yrs 2 mo | $24,031 | — |
| $500 (+$100) | 5 yrs 5 mo | $12,513 | $11,518 |
| $700 (+$300) | 3 yrs 4 mo | $7,185 | $16,846 |
| $1,000 (+$600) | 2 yrs 3 mo | $4,633 | $19,398 |
Average American Debt by Type (2026)
Benchmark your debt against national averages. Sources: Federal Reserve, Experian, New York Fed.
| Debt Type | Avg Balance | Avg APR | Strategy |
|---|---|---|---|
| Credit Card | $6,500 | 20–24% | Avalanche — highest rate, pay aggressively |
| Personal Loan | $11,500 | 11–20% | Avalanche or snowball depending on rate |
| Auto Loan | $23,000 | 6–8% | Avalanche — moderate rate; pay extra on principal |
| Student Loan (federal) | $37,500 | 5–7% | Income-driven repayment; invest first |
| HELOC | $42,000 | 8–10% | Avalanche if adjustable rate; watch Fed moves |
| Mortgage | $230,000 | 6–7% | Invest before extra mortgage payments |
Figures are approximate national averages. Prioritise debts with the highest APR for maximum interest savings.
How to Create a Debt Payoff Plan — Step by Step
The fastest debt payoff strategies maximize interest savings while maintaining psychological momentum. Both Avalanche and Snowball work — choose based on your personality.
- 1Step 1: List all debtsWrite down every debt: balance, APR, minimum payment. Include credit cards, personal loans, student loans, auto loans. Exclude mortgage (different payoff strategy).
- 2Step 2: Calculate total minimum paymentsAdd up all minimums. This is your floor — you must pay at least this each month. Any extra goes to your target debt.
- 3Step 3: Choose your strategyAvalanche: extra money → highest APR debt first. Saves the most interest. Snowball: extra money → smallest balance first. Faster wins, better psychology. Hybrid: knock out one small debt for motivation, then switch to Avalanche.
- 4Step 4: Find your extra payment amount$200 extra is more than it sounds. On $20,000 total debt at average 18% APR, $200 extra/month cuts payoff time in half and saves $8,000+ in interest.
- 5Step 5: Calculate payoff orderPay minimums on all debts. Direct 100% of extra toward target debt. When that debt is paid off, add its minimum payment to next target (the "debt roll"). This creates a snowball effect.
- 6Step 6: Protect against relapseCut the cards after payoff (or freeze them). Build a $1,000 emergency fund first so unexpected expenses don't go back to credit cards. After debt-free: redirect all payments to savings/investments.
Debt Payoff Examples
Avalanche Method — 3 Debts, $300 Extra/Month
Starting debts: CC ($4,000 @ 22%), Personal loan ($8,000 @ 12%), Auto ($12,000 @ 6%). Minimums: $80 + $180 + $250 = $510/month.
| Order | Debt | Payment | Paid Off In |
|---|---|---|---|
| 1st (highest APR) | CC $4K @ 22% | $80 min + $300 extra | 10 months |
| 2nd (roll CC payment) | Personal $8K @ 12% | $180 + $380 = $560 | 13 months later |
| 3rd (roll again) | Auto $12K @ 6% | $250 + $740 = $990 | 10 months later |
Debt-free in ~33 months (vs 5+ years on minimums only). Total interest saved: ~$5,200.
How Extra Payments Accelerate Debt Payoff
$20,000 total debt at 18% average APR, $400/month minimum
| Monthly Payment | Payoff Time | Total Interest | Interest Saved |
|---|---|---|---|
| $400 (minimum) | 8.3 years | $19,800 | — |
| $500 (+$100) | 5.1 years | $10,600 | $9,200 |
| $600 (+$200) | 3.8 years | $7,400 | $12,400 |
| $800 (+$400) | 2.7 years | $4,900 | $14,900 |
| $1,000 (+$600) | 2.2 years | $3,700 | $16,100 |