Definitions

Mortgage amount: Original or expected balance for your mortgage.
Interest rate: Annual interest rate for this mortgage.
Term in years: The number of years over which you will repay this loan. The most common balloon mortgage terms are 5 years and 7 years. After the mortgage term is complete, you will then need to refinance or pay off the remaining balance.
Monthly payment: Monthly principal and interest payment, or PI. The monthly payment is calculated using a 30-year term.
Total payments: Total of all monthly payments over the term of the balloon mortgage. This total payment amount assumes that there are no prepayments of principal.
Total interest: Total of all interest paid over the term of the balloon mortgage. This total interest amount assumes that there are no prepayments of principal.
Prepayment type: The frequency of prepayment. The options are: none, monthly, yearly and one-time payment.
Prepayment amount: Amount that will be prepaid on your mortgage. This amount will be applied to the mortgage principal balance, based on the prepayment type.
Start with payment: This is the payment number that your prepayments will begin with. For a one-time payment, this is the payment number in which the single prepayment will be included. All prepayments of principal are assumed to be received by your lender in time to be included in the following month's interest calculation.
Savings: Total amount of interest you will save by prepaying your mortgage.