The former member for Wagga Wagga resigned in August 2018, after a stint in the witness box of an Independent Commission Against Corruption into the Canterbury City Council turned the spotlight on his own conduct.

Mr Maguire was played taped phone calls during which he asked for a commission for helping to broker a property deal for a "mega big" Chinese client.

He is now the subject of his own corruption probe - Operation Keppel - over his dealings with property developers and a "cash for visas" scheme.

In evidence given during four weeks of public hearings last year, Mr Maguire agreed he had breached public trust and improperly used his status and office to gain benefits for himself.

The same inquiry saw ex-premier Gladys Berejiklian admit while giving evidence that she had been in a secret relationship with Mr Maguire spanning several years.

That confession sparked a separate investigation into Ms Berejiklian's conduct, which resulted in her resigning as premier on October 1, although she denies any wrongdoing.

Documents tabled to the NSW parliament this week revealed that $26,276.42 has been paid towards Mr Maguire's legal expenses as at 10 November.

Any witness before the ICAC is entitled to apply for legal or financial assistance, but unlike legal aid, it is not means-tested.

It is not clear whether the amount paid met all of Mr Maguire's legal costs, or whether some has come out of his own pocket.

Greens MLC David Shoebridge has argued the funds should be cut off as it is now "very clear" Mr Maguire's conduct doesn't relate to any legitimate work for the parliament.

"He was actively seeking to feather his own nest, and taxpayers should not be paying for his defence," he told AAP.

But Attorney General Mark Speakman in October told a budget estimates it was "immaterial" whether Mr Maguire's appearance at the ICAC was connected to his work as a parliamentarian.

While his department handles applications for assistance, Mr Speakman said he had delegated the decision to the secretary of the Department of Communities and Justice.

"Given the political controversy... it has been my practice to keep well away, completely away from the decision-making and delegate it," he said.

However, if Mr Maguire is convicted of any offence, he will have to pay back his legal costs, Mr Speakman said.

The ICAC is yet to deliver its findings into his conduct.

But Mr Shoebridge wants a review now.

"We will now make a formal representation to the secretary to review this grant of legal assistance," he said.

"Mr Maguire has taken enough from the people of NSW."

Australian Associated Press