This is a list of player transfers involving Premiership Rugby teams before or during the 2019–20 season. The list is of deals that are confirmed and are either from or to a rugby union team in the Premiership during the 2018–19 season. It is not unknown for confirmed deals to be cancelled at a later date. On 19 April 2019, London Irish are promoted to the Premiership Rugby whilst Newcastle Falcons are relegated to the RFU Championship for the 2019–20 season.