Debt Payoff Calculator
Debt payoff calculator
Estimate payoff time, extra-payment impact, or required monthly payment for a target payoff window.
Quick scenarios
Estimated payoff time
50 months
About 4.17 years with $550.00 going out each month.
Est. payoff
Sep 2030
Projected interest
$8,856.59
Total paid
$27,356.59
Monthly payment
$550.00
Advanced options
- First-month interest: $308.18 and principal reduction: $241.82.
- Add an extra monthly payment to see how much time and interest you can save.
- Minimum principal-reducing payment starts above $308.19 for this balance and APR.
- Projected payoff date: Sep 2030.
Annual payoff checkpoints
Each row groups up to 12 monthly payments. The final row may represent a partial year near payoff.
| Period | Principal paid | Interest paid | Ending balance |
|---|---|---|---|
| Year 1 | $3,183.05 | $3,416.95 | $15,316.95 |
| Year 2 | $3,881.00 | $2,719.00 | $11,435.95 |
| Year 3 | $4,731.99 | $1,868.01 | $6,703.95 |
| Year 4 | $5,769.58 | $830.42 | $934.37 |
| Year 5 | $934.37 | $22.23 | $0.00 |
Payoff trend (ending balance)
Checkpoint bars show projected ending balance over time. Final checkpoint reaches $0 near payoff.
Assumptions & disclaimer
Planning and comparison estimate only, not financial advice.
- APR is treated as fixed and converted to a monthly rate using APR / 12.
- Payments are assumed monthly and on time, with no new charges added during payoff.
- Extra payment is added each month on top of the base payment.
- Late fees, promo-rate changes, taxes, and lender-specific rules are excluded.
Flow
- Choose payoff timeline or required-payment mode.
- Enter the balance, APR, and either your monthly payment or the target payoff months you want to hit.
- Add an extra monthly payment when you want to compare snowball or avalanche-style acceleration.
- Review the answer-first result, strategy comparison, payoff trend bars, and annual checkpoints.
- Download the payoff schedule CSV when you need to share or audit the repayment plan.
Example
Worked example: 18500 balance, 19.99% APR, 550 monthly
- 1 Monthly rate = 19.99% / 12.
- 2 Each month adds interest, then the monthly payment reduces principal.
- 3 Repeat until balance reaches zero while tracking payoff month and cumulative interest.
Payoff takes about 50 months with total interest around 8857 dollars.
How
- Choose payoff timeline or required-payment mode.
- Enter the balance, APR, and either your monthly payment or the target payoff months you want to hit.
- Add an extra monthly payment when you want to compare snowball or avalanche-style acceleration.
- Review the answer-first result, strategy comparison, payoff trend bars, and annual checkpoints.
- Download the payoff schedule CSV when you need to share or audit the repayment plan.
Avoid
- Setting monthly payment below first-month interest so principal never drops.
- Mixing yearly payment assumptions into monthly payment input.
- Ignoring the minimum-payment warning and assuming any positive payment will reduce principal.
- Assuming the estimate includes late fees, new purchases, or rate changes.
Ref only. Verify assumptions, fees, taxes.
FAQ
Does this assume fixed payment?
Yes. The model assumes a fixed monthly payment and optional fixed extra payment until the balance is cleared.
Can I use this for credit cards?
Yes. It works well for revolving balances when APR and payment assumptions are known and you are not adding new charges during payoff.
Why can payoff fail?
If monthly outflow is not enough to cover first-month interest, principal will not shrink. The route blocks this and shows a minimum payment warning.
Does this include fees or changing rates?
No. It is a planning estimate that assumes a fixed APR and excludes fees, penalty APR changes, and new purchases.
Can I export a schedule?
Yes. Use Download schedule CSV to export month-by-month payment, principal, interest, and ending-balance checkpoints.
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