One of Evreward's most popular merchants since 2006, Benefit Cosmetics offers coupons, cash back rebates and rewards, with savings as high as $85 off. Benefit Cosmetics discount coupons are plentiful, usually available every month, and are often more valuable than similar merchants. Even when Benefit Cosmetics doesn't have a coupon, you can always get up to 15% cash back, and other great rewards, with every purchase.