Obtain coupons for Gain laundry detergent by visiting the brand's official page on PGEveryDay.com. Alternately, check the coupons page of retailers such as Walmart.com or search coupon aggregate sites such as CouponSherpa.com, as of 2015. The discount amount, restrictions and availability of the coupons may vary over time and between locations.
PGEveryDay.com features a wide range of information for the daily use of products from the Proctor and Gamble corporation, including coupons for certain products. To locate its selection of Gain coupons, click the Our Brands or Coupons & Offers sections in the main navigation bar, and navigate through the different options to locate the product. Alternately, conduct a keyword search for "Gain" on the site, and scroll through the results to identify any printable or online coupons.
Walmart.com, along with many other national retail chains, offers customers printable coupons through a special Coupons section of the site. Some of these entries may include manufacturers coupons, though this information may only appear on the printed coupon. Certain retailers may offer exclusive coupons only valid at their stores, which typically include details about such restrictions on both the coupons and the sites.
CouponSherpa.com includes sections for various brands, companies and stores on its site. Its section on Gain includes various coupons from the manufacturer and other retailers. Each listing includes an expiration date and any other applicable restrictions.