Tracked by Evreward since 2012, Black + Decker offers coupons and cash back rebates, with savings as high as 20% off. Black + Decker discount coupons are seasonal, appearing every three to four months, and are often more valuable than similar merchants. Even when Black + Decker doesn't have a coupon, you can always get up to 12% cash back, and other great rewards, with every purchase.