•    The CorelDRAW Graphics Suite is a perpetual license.  Yours to use until upgrading your operating system makes it incompatible with your version of CorelDRAW (normally about five to eight years).  
•    The optional annual CorelSure Upgrade Protection provides the latest version whenever it is released.  (http://www.corel.com/en/volume-licensing/business/maintenance/).  If you purchase and maintain CorelSure you never need to purchase the basic license again (with the exception of adding licenses!)