A balloon payment is a large payment due at the end of a balloon loan, such as a mortgage, commercial loan or other amortized loan. SN 807C Installment Note, equal monthly payments, includes balloon payment (OR) Stevens-Ness Law Publishing Co. Small form, formatted to fill 8.5x11 sheet.A balloon note is a type of loan where the borrower is required to make regular payments, called interest-only payments, for a specified period. Use our free, attorneycrafted Washington Promissory Note template. Find out what's included in the agreement and how to write it.