Tau, the PSL Footballer of the Season, has completed his move to Brighton & Hove Albion on a four-year deal after jetting out to England this week to undergo a medical.
Albion have confirmed the Bafana Bafana international will be loaned out in the new season.
According to reports, the Premier League side forked out around R50 million for Tau.
Tau said: "I would like to thank the Mamelodi Sundowns family, the president, the board, management, staff, supporters and the players for the incredible memories and experiences which we shared throughout my time at Sundowns. Thank you! Ka Bo Yellow!"