Before you buy find out how much you will pay monthly based on the information provide. PMI Private mortgage insurance is the extra interest rate you pay if you did not pay 20% or more in downpayment. It is general from .08-1.35 for conventional loans, and 1.75 for FHA (kown as MIP, Mortgage Insurance Premium) Property tax is generally from 1.2-1.35. Annual Homeowner's insurance, and HOA are generally divided by 12 to know the monthly payments.