Despite Koepka's move, prominent LIV Golf players Bryson DeChambeau, Jon Rahm, and Cameron Smith have confirmed they will remain with the Saudi-backed league.
The PGA Tour's new 'Returning Member Program' is exclusively for major championship or Players Championship winners since 2022, which Koepka qualified for.
DeChambeau indicated he has a contract with LIV Golf and is expected to secure a new deal worth an estimated $500 million.
PGA Tour chief executive Brian Rolapp stated Koepka's return includes a five-year forfeiture of potential equity in the Player Equity Program, estimated at $50-85 million.