Liberal MP Alan Tudge quits politics

Mr Tudge said he "informed the prime minister and speaker of my decision earlier today and leader of the opposition has known my likely intent since early January when my decision was cemented following the passing of my father".

"It's not been an easy decision for me but it is necessary for my health and for my family among other reasons. I certainly have not taken this decision lightly.

"My daughters, who are 18 and 16, no nothing other than their dad being away," Mr Tudge said.

"They've had to put up with things that no teenager should have to, including death threats," he said.

The announcement would trigger a by-election in Aston, less than a year after he narrowly held onto the outer Melbourne seat at the 2022 poll.

Mr Tudge, who has been in parliament since 2010, holds the seat by 2.8 per cent after suffering a swing of more than 11 per cent.

He previously held ministries in the education and human services portfolios under the previous coalition government.

Mr Tudge stepped down from cabinet last year after he was accused of emotional and physical abuse by his former staffer Rachelle Miller, with whom he admitted to having an affair.

He has denied the claims of abuse.

Last week, Mr Tudge gave evidence at the royal commission into the robodebt scheme.

Australian Associated Press