Donaldson R F Amortization Schedule Calculator
See exactly how each loan payment splits between interest and principal, month by month.
0Monthly payment
0Total interest
0Total paid
0Payments until paid off
How an amortization schedule works
Each month the lender charges interest on the remaining balance; whatever is left of your fixed payment reduces the principal. Early payments are mostly interest, later ones mostly principal. The payment is calculated as P × r ÷ (1 − (1 + r)−n), where r is the monthly rate and n the number of months. Extra payments go straight to principal, so the loan is paid off sooner and total interest drops. Figures are estimates and ignore fees, taxes and insurance.