The 2012–13 season once again saw Ah You make all of his appearances from the bench. He played in 13 2012–13 Pro12 matches, and played in Connacht's away game to Zebre in the 2012–13 Heineken Cup. In February 2013, Ah You signed an extension to his contract to keep him with Connacht until the end of the 2013–14 season.