A fixed principal payment loan has a declining payment amount. That is, unlike a normal loan, which has a level periodic payment amount, the principal payment part of the payment is the same payment to payment and the interest portion of the payment is less each period due to the declining principal balance. Thus the payment is from one payment to the next. Ultimately, the borrower will pay less in interest with this loan method.
This calculator will solve for any one of four possible unknowns: "Amount of Loan", "Total Scheduled Periods" (term), "Annual Interest Rate" or the "Periodic Payment".
Enter a '0' (zero) for one unknown value.
The term (duration) of the loan is a function of the "Total Scheduled Payments" and the "Payment Frequency". If the loan is calling for monthly payments and the term is four years, then enter 48 for the "Total Scheduled Periods". If the payments are made quarterly and the term is ten years, then enter 40 for the "Total Scheduled Periods".
Normally you would set the "Payment Method" to "Arrears" for a loan. This means that the monies are lent on one day and the first payment isn't due until one period after the funds are received.
If the first payment is due on the day the funds are available, then set "Payment Method" to "Advance". This is typical for leases.