Tracked by Evreward since 2009, SK-II offers coupons, cash back rebates and rewards, with savings as high as $30 off. SK-II discount coupons are somehwat rare, available a few times each year, but are often more valuable than similar merchants. Even when SK-II doesn't have a coupon, you can always get up to 15% cash back, and other great rewards, with every purchase.