Kroger Boost is a paid membership program offered by Kroger that provides shoppers with free grocery delivery and double gas rewards. The program offers two membership options: $59 per year for free next-day delivery on grocery orders of at least $35, and $99 per year for free delivery in under two hours on grocery orders of at least $35. Boost benefits are active within one hour of purchase and are available only at Kroger grocery stores. Boost membership does not work on purchases made on fuel or pharmacy prescriptions, Fred Meyer Jewelers, The Little Clinic, Fred Meyer Direct, homechef.com, Vitacost.com, Kroger SHIP, Kroger Rush, Murray’s Cheese, or Kroger Delivery Now. To enroll in the program, you must be 16 years or older and an existing member of a Kroger Co. loyalty program with a registered digital account. Boost can only be used by persons in your immediate household who use your Kroger Co. Family of Stores loyalty card or Alternate ID.