The legendary Scot has been at the helm of the Old Trafford outfit since November 1986 and has brought unprecedented success to the Red Devils.
There has been speculation over when Ferguson will call time on his career with United ever since he performed a U-turn over his initial decision to quit when he turned 60 seven years ago.
Darren Ferguson, who is following in his famous father's managerial footsteps with his role at Peterborough, believes it could be next summer when the United boss elects to call it a day.
BuildingFerguson has stated that he wants to help United equal Liverpool's record of 18 English league titles, with the Red Devils just one adrift.
The North West rivals are battling for Premier League supremacy this term, with the Anfield outfit having cut United's lead at the summit to just one point, although the reigning champions still have a game in hand.
Ferguson jnr said of his father: "His health is fine and he's building a new team.
"If they win (the Premier League) this year then they catch Liverpool in terms of titles won.
"I can see him doing this year and next - and then that might be it for him."