A promissory note, also referre to as a note payable in accounting, is a contract detailing the terms of a promise by one party (the maker) to pay a sum of money to the other (the payee). The obligation may arise from the repayment of a loan or from another form of debt. For example, in the sale of a business, the purchase price might be a combination of an immediate cash payment and one or more promissory notes for the balance.