Your mortgage-payment calculation requires a critical step that converts your annual interest. Keep in mind that you may pay for other costs in your monthly payment such as homeowners insurance property taxes and private mortgage insurance PMI. For these fixed loans use the formula below to calculate the payment.
See a breakdown of your monthly and total costs including taxes insurance and PMI.
Payment per Period. To figure your mortgage payment start by converting your annual interest rate to a monthly interest rate by dividing by 12. P B r12 1 r12m 1 r12m - 1. The monthly payment c depends upon.