The announcement comes little more than a year after the club was plunged into administration, allowing Charles Green's Sevco consortium to buy the business and assets.
Finance director Brian Stockbridge made the prediction for the Third Division side as he believes an enhanced retail operation combined with greater sponsorship income – including a naming deal for Ibrox Stadium – will supplement match-day and football revenue.
The club pulled in £9.5m of revenue between May and December last year and reported a £7m loss.
Rangers is now involved in a joint venture with Mike Ashley's Sports Direct, and recently signed a kit deal with Puma.
Mr Stockbridge revealed the Ibrox mega-store is soon to quadruple in size, on a site on the ground floor of the Edmiston House office block at the stadium.
He said: "If we can only do as good as £20m [even] with Mike Ashley as our partner, with Puma and with internet sales, then suddenly we are looking at £80m to £90m turnover.
"Then you look at the additional sponsorship possibilities and think it would be nice to get it to £100m."
He said Rangers were looking at opening a retail store at Glasgow Airport and one in Belfast. Internet sales and the use of Puma's international retail presence are also expected to grow revenue.