A balloon payment is a lump sum that's due at the end of the loan term. It is good because it will: Lower your loan repayments.Set loan terms with larger payments at the end. A balloon payment is a large, lumpsum payment due at the end of a mortgage or other loan. Get a non-bank loan that's paid back in installments with a secured promissory note. Create and download a promissory note for free! Promissory Note with Balloon Payments - Read online for free. This document is used to loan or borrow money.