Scholes originally retired from playing at the end of the 2010/11 campaign before reversing his decision in January 2012.
The 38-year-old has made 19 appearances for United this term, but has not featured since the end of January due to a knee injury and Ferguson is awaiting Scholes' decision.
"We'll have to wait and see with Scholes," Ferguson told the club's official website. "He's got an injury that is bothering him a lot.
"It doesn't matter as he'll be here anyway - whether as a player or coach. He'll be here anyway."
The former England international helped to coach United's reserves upon his initial retirement and Ferguson confirmed Scholes will again be part of the club's backroom staff when he stops playing.
The United boss added: "It would've been easy to say nothing and carry on with the reserves but he made his mind up he wanted to come back and play and it was a good one for us.
"I think there will come a time when he has to quit anyway, whether it's next year or this year. He's not made his mind up about that.
"He has got a lot to offer us and we do this now, it's a very important part of our club to get players who have made a great contribution.
"Scholes, Nicky Butt is with the reserves; Darren Fletcher, when his time comes, will join. Ryan Giggs will join. Brian McClair, Tony Whelan, Paul McGuinness, Marek Szmid. We have a lot of former players in positions at the club which is healthy for us."