Queensland Deputy Premier Jackie Trad is under pressure to stand down.

Ms Trad is under fire over her purchase of a $695,500 property near a proposed Cross River Rail station - a project for which she had ministerial responsibility.

She referred herself to the state’s Crime and Corruption Commission (CCC) after failing to declare it on her register of members' interests within the required time frame.

Under immense pressure from the media, the LNP opposition and some within her own party, she said this week that she would stand down if the CCC decides to launch a formal investigation.

CCC chairman Alan MacSporran has already announced he would stand aside from any future assessment after Ms Trad personally called him about her referral to the crime watchdog.

Ms Trad says she is yet to hear from the CCC.