This also places him in the top thousand richest people in the country, thanks to a number of lucrative advertising deals.
Last year, when David and Victoria's fortunes were counted separately, he was down in third place with £12m.
But together they have ousted boxer Naseem Hamed, knocking his £30m down into runner-up spot.
Other United players Ryan Giggs and Roy Keane come in third and fourth respectively, whislt former Old Trafford striker Andy Cole is sixth.