That’s according to pundit Richard Keys.
Real Madrid star Bale has been heavily linked with a move to the Red Devils in recent months.
Jose Mourinho is a huge admirer of Bale but revealed this month that a deal for the 28-year-old was mission impossible.
However, Keys says there is still a chance of United landing the former Tottenham star before the window shuts at the end of the month.
Writing in his blog, Keys said: “Finally, to address an issue I keep getting asked about – Bale to United.
Gareth Bale: How would Man Utd line up with Real Madrid superstar?
“I believe we’re going to see some really big money spent before the end of August”
“Transfers aren’t a perfect science – but whilst the window remains open that deal has still got a chance and so have the others that there’s been so much speculation about.
“I believe we’re going to see some really big money spent before the end of August, but exactly where is difficult to be certain about.
“Just watch this space…”
Bale scored and chipped in with an assist in Real’s La Liga opener against Deportivo La Coruna last night.
United have also impressed this season, winning their first two Premier League clashes.