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. 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.Safeguard your financial arrangement with a secured promissory note. Define the installment payment terms of the loan clearly for the borrower and lender. Balloon Payment Loan Calculator - With this balloon payment calculator you can get the monthly and balloon payment or just the balloon payment itself. When such unpaid amounts have been paid in full, the Interest Rate shall thereafter return to the amount set forth in the first paragraph of this Note.