Over the course of your amortization period, you may have many different mortgages. The term is simply the length of time that interest rates, payment schedules and obligations to the lender exist. When the term comes to a close, you will have the option to renew your mortgage at your current or new lending institution. You can also put a lump sum toward the principal without restriction, or pay off your entire mortgage without penalty. If you wish to change the structure of your agreement during the term you may have to pay a substantial fee to the lender.