The Spanish giants purchased the Welsh winger from Tottenham for the aforementioned fee last weekend and former French ace Zidane suggests it is way too high a price to spend on one player.
Zidane also does not believe he was worth the £46.6m Madrid paid Juventus for him back in 2001.
"You need to ask that question in a year's time," Zidane told Canal+ when asked if Bale was worth the fee.
"Ten years ago, they bought me for 75million euros and I said I wasn't worth it.
"Today, I tend to say a player is not worth that. Two clubs agree on a price and no-one is forcing the other to do anything.
"That's football. Unfortunately, it's incomprehensible with what's happening today to pay so much."