Set loan terms with larger payments at the end. All prepayments shall first be applied to outstanding late fees, then to accrued interest and thereafter to the principal loan amount.Amortization. A loan repayment plan, which enables the borrower to reduce his debt gradually through monthly payments of principal and interest. This tool figures a loan's monthly and balloon payments, based on the amount borrowed, the loan term and the annual interest rate. An unsecured promissory note with amortized payments is a promise to pay back a loan when there's no collateral, and it'll be repaid in equal installments. Balloon Payment Loan Calculator - With this balloon payment calculator you can get the monthly and balloon payment or just the balloon payment itself.