Fixed Principal Payment Loan Calculator
Result
Fixed Principal Payment Loan Calculator — free online calculator.
Formula
- Fixed-principal loan calculator. This page documents the mathematical loan model used for the estimate and provides an educational example.
- The main inputs are Loan amount, Annual interest rate, Loan term. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Fixed Principal Payment Loan
- Loan amount: 100000
- Annual interest rate: 6 %
- Loan term: 10 years
A 12,000 loan over 12 payments repays 1,000 principal each period, plus declining interest.
Sample result: Calculating…
Frequently asked questions
What does the Fixed Principal Payment Loan calculate?
Unlike level-payment amortization, total payments decline as the outstanding balance falls.
Which values should I enter?
Enter Loan amount, Annual interest rate, Loan term using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Principal portion per payment = Original principal ÷ Number of payments; Interest = Outstanding balance × Periodic rate.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.