Like most major car rental companies, Enterprise looks to remain competitive by offering drivers regular discounts and coupons on cars. Enterprise offers returning customers regular coupons through its newsletter service. This is an opt-in feature called "email extras."
"Email extras" is completely free, as of June 2015. The company sends coupons and promotions to its subscribers regularly. Sign up for this service at the company's website, Enterprise.com
Additionally, Enterprise coupons appear from time to time on sites like Groupon.com, which offers a limited number of discount coupons occasionally. These include special rates on a particular type of rental model or country-specific low rates.