Best Buy offers 20 percent off coupons online periodically for My BestBuy members at BestBuy.com or via mail. Coupon and promotional deal aggregates such as RetailMeNot also provide 20 percent off coupons that are redeemable at Best Buy.
Shoppers must register for a My BestBuy online account to access and redeem My BestBuy coupons. Availability of the 20 percent off coupon varies at BestBuy.com. Best Buy mails its My BestBuy members these coupons as well.
RetailMeNot often has a special promotion of 20 percent off a BestBuy product. Small appliances, personal items and floor items are usually the items that qualify for this discount. RetailMeNot offers this coupon directly through its mobile application and online at RetailMeNot.com.