Starbucks is revamping its loyalty program and one of the new twists is that you can keep your rewards stars from expiring.

Starbucks (SBUX.O) will introduce a new three-tiered system to its U.S. loyalty program on March 10, chief brand officer Tressie Lieberman announced at the coffee chain’s investor day on Thursday.

Whereas the current program works the same way for all members, the new Starbucks Rewards program will sort members into three ascending membership tiers: Green, the default level; Gold, which can be ...