Debt Payoff Calculator
Create a debt payoff plan using the avalanche or snowball method. Calculate how long to become debt-free and total interest paid.
💰 Finance📐 Avalanche: Pay highest rate first | Snowball: Pay smallest balance first
Total debt amount ($)
Highest interest rate (%)
Monthly payment budget ($)
Number of separate debts
Please enter valid values.
Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| Debt Payoff Calculator | Avalanche: Pay highest rate first | Snowball: Pay smallest balance first | months |
Step-by-Step Examples
Example 1
$25K at 21%
$25,000 debt, 21% rate, $700/month.
- Debt-free: 47 months (3.9 years)
- Total interest: $7,900
- Minimum only (~$500): 83 months, $16,461 interest
✓ 47 months free / save $8,561 vs minimum
Example 2
$10K Quick
$10,000, 18%, $500/month.
- Debt-free: 23 months
- Total interest: $1,597
✓ 23 months / $1,597 interest
Example 3
Credit Card Debt
$15,000, 22%, $400/month.
- Debt-free: 51 months (4.3 years)
- Total interest: $5,433
✓ 51 months / $5,433 interest
Real-World Applications
Debt Holders
Create a realistic debt payoff plan with a timeline.
Financial Counselors
Illustrate avalanche vs snowball payoff strategies.
Budget Planners
Allocate debt payments in monthly budgets.
Credit Counselors
Help clients visualize their path to debt freedom.
Common Mistakes to Avoid
⚠️
Making minimum payments only
Credit cards charge 18-29% APR. Minimum payments (2-3% of balance) barely cover interest, keeping you in debt for years or decades. Even $50-100 extra per month dramatically speeds payoff.
⚠️
Not knowing your rates
You can't use the avalanche method (highest rate first) without knowing all your interest rates. Log in to each account and compile your list: balance, rate, minimum payment.
⚠️
Continuing to spend on paid-off cards
After paying off a card, don't immediately start charging on it. Direct that freed-up payment toward the next debt.
Frequently Asked Questions
Avalanche vs snowball: which is better? ▾
Avalanche (highest rate first): saves the most money in interest. Mathematically optimal. Snowball (smallest balance first): creates quick wins, more psychologically motivating. Snowball is slightly more expensive but effective for people who need momentum.
How much does an extra $100/month help? ▾
On $20,000 debt at 20% APR with $400/month payments: debt-free in 88 months ($15,249 interest). With $500/month: 63 months ($11,381 interest). $100 extra saves 25 months and $3,868.
Balance transfer card strategy? ▾
Transfer high-rate debt to a 0% intro APR card (typically 12-21 months). Pay as much as possible during the intro period. Watch for transfer fees (3-5%) and the go-to rate after the promo ends.
Debt consolidation loan worth it? ▾
If you can consolidate at a meaningfully lower rate (e.g., from 22% credit cards to 10% personal loan), a consolidation loan reduces interest costs. Check for origination fees and avoid extending the term too long.
How to stay motivated during debt payoff? ▾
Track progress visually (debt thermometer). Celebrate milestones (each $1,000 paid off). List reasons why you want to be debt-free. Find an accountability partner. Automate payments so you don't need willpower for every payment.