However, Sports Minister Grant Roberston won't reveal how much.

"We are yet to see their full proposal, but I'm very happy to sit down with the rugby union and work out what level of contribution from the government and is needed," Roberston told Radio NZ.

"I think there's a unique opportunity for New Zealand to lift the visibility of women's sport to show that we value it more than we have in the past and to capitalise on the increased interest there is," he said.

New Zealand is one of six countries hoping to host the tournament, with Australia, England, France, Portugal and Wales also in contention.

Winning the right to host the event has become a major priority for Roberston.

"There are a number of other major women's sports event that are on the horizon for New Zealand to host potentially but the women's World Cup is one that would be very attractive for New Zealanders to support and be a part of," he said.

Countries have until mid-August to formally submit their bids to World Rugby.