Borrower promises to make a single, final payment for the entire balance owed to the Payee on or before. Promissory Note - use for traditional installment or balloon payment. 1.Late Charge: Any above noted payment which is at least ___ days past due 2. Balloon payments -- Prohibited. Balloon mortgages are short-term loans that begin with a series of fixed payments and end with a final, lump-sum payment. Our local Salt Lake City loan specialists are here to sit down with you and go over your personal loan options. Businesses that have a loan with the city can only apply for additional loan if the combined total of loans does not exceed the maximum loan amount.