finance calculator
Compare payoff strategies and estimate time to become debt free.
Return to update balances, minimum payments, APRs, and extra payment amounts as your payoff plan changes.
Debt-free timeline
2 years, 4 months
Formula
Each month: add interest, pay minimums, then apply extra payment by payoff strategyAvalanche prioritizes highest interest debt first; snowball prioritizes smallest balance first.
Step by step
Example
With $16,000 in debt and $200 extra per month, the calculator estimates payoff time, interest, and total repayment.
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Summary
Debt-free timeline
2 years, 4 months
Avalanche strategy selected.
Total debt
$16,000
Starting debt across all entries.
Total interest
$3,141
Estimated interest during payoff.
Monthly payment
$690
Minimums plus extra payment.
D3 visualization
Compare the starting balances included in this payoff strategy.
D3 visualization
A sampled view shows the combined debt balance declining month by month.
Full amortization schedule
Monthly view shows the full exact schedule. Quarterly and yearly views summarize the same monthly schedule. Weekly view is a weekly equivalent split for quick planning.
Swipe sideways to view all columns.
| Period | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| Month 1 | $690 | $473 | $217 | $15,527 |
| Month 2 | $690 | $480 | $210 | $15,048 |
| Month 3 | $690 | $487 | $203 | $14,561 |
| Month 4 | $690 | $494 | $196 | $14,066 |
| Month 5 | $690 | $502 | $188 | $13,564 |
| Month 6 | $690 | $510 | $180 | $13,055 |
| Month 7 | $690 | $517 | $173 | $12,537 |
| Month 8 | $690 | $525 | $165 | $12,012 |
| Month 9 | $690 | $533 | $157 | $11,479 |
| Month 10 | $690 | $541 | $149 | $10,938 |
| Month 11 | $690 | $550 | $140 | $10,388 |
| Month 12 | $567 | $435 | $132 | $9,953 |
| Month 13 | $690 | $564 | $126 | $9,388 |
| Month 14 | $690 | $572 | $118 | $8,816 |
| Month 15 | $690 | $580 | $110 | $8,236 |
| Month 16 | $690 | $588 | $102 | $7,648 |
| Month 17 | $690 | $597 | $93 | $7,051 |
| Month 18 | $690 | $605 | $85 | $6,446 |
| Month 19 | $690 | $614 | $76 | $5,832 |
| Month 20 | $690 | $622 | $68 | $5,210 |
| Month 21 | $690 | $631 | $59 | $4,579 |
| Month 22 | $690 | $640 | $50 | $3,940 |
| Month 23 | $690 | $649 | $41 | $3,291 |
| Month 24 | $690 | $656 | $34 | $2,635 |
| Month 25 | $690 | $663 | $27 | $1,973 |
| Month 26 | $690 | $669 | $21 | $1,303 |
| Month 27 | $690 | $676 | $14 | $627 |
| Month 28 | $633 | $627 | $7 | $0 |
Guide
The debt payoff calculator models a repayment plan across multiple debts. It adds monthly interest, applies minimum payments, then directs extra payment using either the avalanche or snowball strategy.
Avalanche prioritizes the highest interest rate first. Snowball prioritizes the smallest balance first. Both can work, but they optimize for different goals: mathematical interest savings versus motivational quick wins.
Enter balances, APRs, minimum payments, and the extra amount you can pay each month. Choose the strategy and review the debt-free timeline, monthly payment, total interest, and total paid.
Use the chart and schedule to see whether the plan is realistic. If the payoff timeline is too long, test a larger extra payment or adjust the strategy to match your behavior and cash flow.
Each simulated month adds interest to every active debt, applies required minimum payments, then applies the extra payment to the selected target debt. The target is either the highest APR debt for avalanche or the smallest balance for snowball.
The process repeats until every balance reaches zero or the calculator hits the long-plan cap. The output summarizes total interest and total paid across the whole plan.
Use avalanche if you want the strategy that usually minimizes interest. Use snowball if paying off smaller balances first helps you stay consistent. The best plan is the one you can actually follow.
Do not ignore emergency savings, required bills, or hardship options. Debt payoff should fit inside a broader household cash-flow plan.
Debt avalanche
A payoff method that targets the highest APR debt first.
Debt snowball
A payoff method that targets the smallest balance first.
Extra payment
Money paid above required minimums to accelerate payoff.
Avalanche usually saves more interest, while snowball can create faster visible progress by clearing smaller balances first.
No. It assumes balances only go down except for monthly interest. New purchases will change the timeline.
Update the input and rerun the calculator. Real minimum payments can change as balances fall.