A loan agreement is a legal contract between a borrower and a lender regulating the mutual promises made by each party. It is a formal document that evidences a loan. An agreement is a legal document and a written promise to repay the money that is described by the Agreement between the lender and the borrower. This document is used to record the terms between the parties including the method and amount of repayment of loan and also the penalty in case of default of such payment.