The host nation must pay the governing body $220 million to stage the tournament but France has offered the additional money as it tries to edge out Ireland and South Africa in the battle to win hosting rights.
"You have to pay a fee to host. It is a minimum. We have proposed not 120 million pounds but 150 million pounds," France's bid leader Claude Atcher said.
"This fee is 100 percent guaranteed by the French government."
France, South Africa and Ireland have submitted formal bids for the 2023 tournament.