• If you wish to prepare an amortization table of the loan that includes interest. • If you want to see and determine the amount of monthly payment for the loan.A Promissory Note with Balloon Payments is a loan contract that enables a lender set loan terms with one or more larger payments at the end. Balloon Loan Payment Calculator. Here's the information you'll need to have handy to complete your secured promissory note, installment with balloon final payment. A typical amortization schedule is 30 years (which keeps monthly payments low) and ends with a balloon payment within five or ten years. This tool figures a loan's monthly and balloon payments, based on the amount borrowed, the loan term and the annual interest rate.