Moyes admits the club came close to a 'major' signing in the summer, which is believed to have been Gareth Bale - who joined Real Madrid for over £80million.
Now Moyes says that they are ready to spend, having only managed to strike one deal in the summer when they brought Marouane Fellaini from his former club Everton.
"The club have the money and they will spend, there's no question about that," Moyes is quoted by a number of newspapers.
"We were very close to a major, major signing back in the summer.
"It's easy now saying it and we didn't do it but we were really close to a major signing and the club would have definitely shown what they're worth."
Deals for the likes of Cesc Fabregas, Thiago and Ander Herrera also failed in the summer, but Moyes insists that money was never an issue.
"It wasn't for money, that's for sure. The players had chosen other clubs or made their decisions elsewhere.
"The bigger picture is I want players going forward, not just for the next six months.
"I'm looking to see if I can get someone who will be with us for the next six or seven years."
Moyes also admits that he is looking at his current squad and could be willing to let a number leave.
"Would we sell? If the right offers were there, we'd probably look at it," he said.
"I've tried to give an opportunity to everybody.
"We'll be balancing trying to move people on but also trying to bring people in."