Formula Used
Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
P = principal, r = periodic interest rate, n = number of payments.
How the formula is applied
The calculation links Home price ($), Down payment ($) and Interest rate (%) to loan amount. A financed fee becomes part of principal and can increase both the payment and interest. It differs from a charge paid in cash at closing.