The identity of the new investor, who will have an equal 50/50 share with current owner Kevin McCabe, will be unveiled on Tuesday.
It is believed the new man is currently out of the UK, but is likely to meet the media on Friday 6th/Saturday 7th September, as a reshaping of the football club's board is about to take place.
The investor's representative has today said "think Liverpool" in regards to the potential amount of investment into the first team, and the aim is to get the club back to the Premier League and make sure it stays there.
The finer details of the deal are yet to be released, but it has been made clear that the investment is primarily for the first team.
United paid a reported £350,000 for Oldham's Jose Baxter last night to reinforce their attacking options, with further signings to come.
Kevin McCabe today said he'd be "very surprised" if no more faces didn't come in.
Stoke's Florent Cuvelier, Coventry's Callum Wilson, and former Blade and current Southamton striker Billy Sharp have all been linked with moves to Bramall Lane.
Blades boss David Weir has three days to spend any potential additional funds, with the transfer Window closing at 11pm on Monday.
The bigger picture is sure to become clearer in the next week.