So be sure to have those numbers handy to add to your mortgage payment and to help determine whether you can accelerate payments. Keep in mind that your mortgage calculator results won’t include insurance or escrow for taxes. Next, you’ll play around with additional principal payments that you can comfortably handle each month. These are your starting points for plugging numbers into the calculator. This does not include current home insurance or tax escrow. Current mortgage payment: The monthly payment, principal and interest, based on your original mortgage (amount, interest rate and term).The APR is higher because it does include these fees. It does not include private mortgage insurance, the origination fee or point(s) paid at the beginning of the mortgage, which is why this rate is lower than your Annual Percentage Rate (APR). Annual interest rate: The simple interest rate on your loan.Remember, this includes interest, so don’t confuse it with the remaining principal balance. Original mortgage amount: The amount you first financed.

Terms of 15, 20 and 30 years are most common.

Original mortgage term: The length of your original mortgage in years.

Years remaining: How many more years are left in your mortgage term.

Here is some lending terminology you might need to know, so you’re plugging the correct numbers into the mortgage payoff calculator:

Mortgage calculator payments