Finance
Loan Payoff Calculator
Find how long a loan takes to repay with your chosen monthly payment, including total interest and the final payment. Nothing you enter leaves your browser.
Enter your values, then calculate.
Calculation method
A transparent estimate.
Every adjustable assumption stays visible, so you can understand what drives the result and tailor it to your situation.
Each month: interest = balance × annual interest rate (%) / 1200; new balance = balance + interest − payment. Repeat until the balance reaches zero.What this estimate assumes
- Uses USD, a fixed nominal annual interest rate, and monthly payments at the end of each month. Enter the interest rate rather than APR, which may include fees.
- Interest is rounded to cents monthly. Estimated payments use the smallest whole-cent amount that repays the balance within the selected term; the final payment is capped at the amount owed.
- Supports 1–600 months and annual interest rates from 0% to 100%. Taxes, insurance, variable rates, daily interest, and prepayment penalties are excluded.
- The entered payment is fixed and must cover interest and reduce principal. No new borrowing or changing minimum payments are modeled.
Research sources
What this tool does
About the Loan Payoff Calculator
Find how long a loan takes to repay with your chosen monthly payment, including total interest and the final payment. It is a planning aid for comparing scenarios; it is not financial, tax, lending, or investment advice.
The calculation uses remaining loan balance, annual interest rate (not apr), and monthly principal and interest payment.
How to use it
- Review the starting values for remaining loan balance, annual interest rate (not apr), monthly principal and interest payment and replace them with your own.
- Choose any available units or assumptions, then select “Calculate payoff time.”
- Read the labeled result, compare another scenario if needed, and copy the output for your notes.
Practical example
Start with a known input
The workbench starts with a complete scenario: Remaining loan balance: 25000 $ Annual interest rate (not APR): 7.5 % Monthly principal and interest payment: 600 $ Change one assumption at a time to see how it affects the result.
What to know about the result
- Results are estimates based only on the supplied values. Rounding, fees, local rules, and real-world conditions may change the final outcome.
Common questions
Using the Loan Payoff Calculator
Is the Loan Payoff Calculator free to use?
Yes. FormatCalc's Loan Payoff Calculator is free to use with no account required.
Is my data private when I use the Loan Payoff Calculator?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the Loan Payoff Calculator?
Enter your values, select any units, and choose Calculate payoff time. You can then copy the result.
How is the Loan Payoff Calculator calculated?
It uses Each month: interest = balance × annual interest rate (%) / 1200; new balance = balance + interest − payment. Repeat until the balance reaches zero.. The result is a planning estimate based on the values and assumptions shown on this page.