Tracked by Evreward since 2011, Carhartt offers coupons, cash back rebates and rewards, with savings as high as 25% off. Carhartt discount coupons are rare, only available once or twice a year, and can be less valuable than similar merchants. Even when Carhartt doesn't have a coupon, you can always get up to 20% cash back, and other great rewards, with every purchase.