National leader Judith Collins says today's caucus meeting will go over portfolios and update MPs on the party's review of the election campaign defeat.
The substance of the review and the reviewers are yet to be determined by the party's board.
Deputy leader Gerry Brownlee said it was a matter for caucus as to whether he'd stay on as deputy leader.
He said he wanted what was best for the party. He refused to answer whether he thought he was the right person for the deputy role but said he'd done well in the position before.
Today is just the second time the National Party has met after its devastating election defeat, where it lost 20 MPs.
National Party president Peter Goodfellow said the terms of reference for the election campaign review was being drafted this week.
The review would be more comprehensive and robust than the party's usual campaign reviews, he said.
Collins on assigning shadow portfolios
Shadow portfolios would be decided after the new Government announces its portfolios, Collins said.
One of the considerations was to sometimes test MPs in areas they hadn't had experience in before.
Collins said Labour might need the Greens in government to "blame" them.
National's leader said she hasn't considered which portfolios she would like, besides national security, as she wanted to know what roles her MPs were keen for.