# When Will This Balance Be Paid Off?

> Estimate payoff months from an outstanding balance and the monthly payment you can make.

Page: https://askcalculators.com/us/repayment/
Definition: https://askcalculators.com/us/repayment/definition.json
JSON Schema: https://askcalculators.com/us/repayment/schema.json
Version: 20.13.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/us/repayment/?amount=9000&rate=0&monthlyPayment=300&extraPayment=0

## Inputs
- amount: Outstanding balance; type=money; required; default=20000; min=0
- rate: Annual interest rate; type=percent; required; default=6; min=0; max=100
- monthlyPayment: Chosen monthly payment (optional); type=money; optional; min=0
- term: Original scheduled term, when payment is blank (years); type=number; optional; default=5; min=0.01
- extraPayment: Additional monthly payment; type=money; optional; default=0; min=0

## Outputs
- months: Months to payoff; format=integer; primary
- monthlyPayment: Total monthly payment; format=currency
- finalPayment: Final payment; format=currency
- totalInterest: Total interest; format=currency
- totalPaid: Total repaid; format=currency

## Formula
For positive r, n = −ln(1 − P × r / M) / ln(1 + r); round up the payment count and adjust the final payment.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.