Free mortgage payoff calculator to evaluate options to pay off a mortgage earlier, such as extra payments, bi-weekly payments, or paying back altogether. Mortgage Payoff Calculator.Please submit the following information with the form: Deed of Trust; Borrower(s) Signed Authorization; The Signed Loan Payoff Request Form. The mortgage payoff calculator helps you find out. Use SmartAsset's free California mortgage loan calculator to determine your monthly payments, including PMI, homeowners insurance, taxes, interest and more. Use our free mortgage calculator to easily estimate your monthly payment. See which type of mortgage is right for you and how much house you can afford. When we receive a request for the payoff balance of a loan, we will issue a payoff demand statement.