This debt payoff calculator builds a complete payoff plan for all your debts at once. List each balance, APR and minimum payment, add any extra money you can pay monthly, and it compares the snowball and avalanche strategies — months to debt-free, total interest, and which one saves you more.
| Debt name | Balance ($) | APR (%) | Min. payment ($) |
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What Is a Debt Payoff Calculator?
A debt payoff calculator plans how to clear several debts together. Anyone can pay minimums and hope; a plan decides which debt gets your extra money each month, rolls freed-up payments into the next debt, and tells you the finish date and the true interest cost of the whole pile. This calculator runs the two proven strategies side by side on your actual numbers. It lives in our Finance Calculators collection; for one card at a time, use the Credit Card Payoff Calculator.
Snowball vs. Avalanche
- Avalanche: extra money attacks the highest APR first. Mathematically optimal — least interest, often the fastest finish.
- Snowball: extra money attacks the smallest balance first. Debts disappear sooner one by one, which keeps many people motivated to finish.
Both strategies pay every minimum, and both roll a cleared debt's payment into the next target — the "snowball effect" that accelerates the end of either plan.
Debt Payoff Example (Verified)
Three debts — Card A: $1,200 at 19% (min $30), Card B: $3,500 at 24% (min $75), Loan C: $6,000 at 9% (min $120) — plus $150 extra per month:
- Avalanche: debt-free in 35 months, total interest $2,182
- Snowball: debt-free in 35 months, total interest $2,283
- Avalanche wins by about $101 here — but note the tie in time. When the difference is this small, pick the plan you will actually stick to; an abandoned "optimal" plan loses to a finished snowball every time.
Try removing the extra $150 in the calculator to see how much longer minimums-only takes, and how much more it costs. For fixed loans with a set schedule, our Amortization Calculator shows every payment, and the Loan Calculator prices a consolidation loan if you are comparing that route.
Related Tools
- Credit Card Payoff Calculator — one card, in depth
- Amortization Calculator — fixed loan schedules
- Loan Calculator — consolidation loan payments
Frequently Asked Questions
Which is better, snowball or avalanche?
Avalanche always costs the same or less interest. Snowball often wins on motivation. If the interest difference is small (the calculator shows it), choose the one you will stick with.
Should I stop saving while paying off debt?
Keep a small starter emergency fund (often $1,000) so a surprise expense does not go straight back on a card, then attack high-APR debt before building larger savings — a 24% APR grows faster than any savings account pays.
Does this calculator include debt consolidation?
Not directly. To test consolidation, price the new loan in the Loan Calculator and compare its total interest with the avalanche total here.
What if a minimum payment doesn't cover interest?
That debt grows even while you pay it — a warning sign to prioritize it (avalanche does automatically) or speak to the lender or a nonprofit credit counselor.
How much extra should I pay?
Any amount helps; even $50/month extra on typical card debts saves hundreds in interest and months of payments. Enter amounts above and watch the finish date move.
Is this debt payoff calculator free?
Yes — free, instant, no sign-up, and your numbers never leave your browser.