Premier Gladys Berejiklian is upping the pressure on disgraced Liberal MP Daryl Maguire to quit as the member for Wagga Wagga, signalling she is willing to endure a byelection ahead of the state poll next March.

After calls from the Opposition for the Premier to intervene, Ms Berejiklian said on Sunday she would encourage Mr Maguire to “think carefully as to whether he can effectively represent the people of Wagga Wagga from here on in”.

Daryl Maguire outside ICAC on Friday. He resigned from the Liberal Party at the end of the day's hearing. Credit:Janie Barrett

“I was shocked by the events of Friday and I spoke to Mr Maguire late that afternoon to express in the strongest possible terms my deep disappointment,” she said in a strongly worded statement.

“He has let down his constituents, the people of NSW, and the NSW Liberal Party.”