The Farlam Commission of Inquiry was finalising its report into the events at Marikana and would hand it over to President Jacob Zuma before the end of March, it said on Saturday.
"We are still operating within our terms of reference which says it should be done by the end of the month, which is Tuesday," said the commission's secretary Phuti Setati.
"The commissioners are still finalising the report."
Setati said the commissioners were in discussions with the presidency on how the report would be handed over.
"We haven't yet got directions from the presidency on how we are going to present it.
"Once we're done with the report, the work of the commission is done... then it's no longer in our province whether the report is made public or not."
The commission investigated the deaths of 44 people during strike-related violence at Lonmin's platinum mining operations at Marikana, near Rustenburg, North West.
Thirty-four people, mostly striking mineworkers, were shot dead in a clash with police, over 70 were wounded, and another 250 arrested on August 16, 2012.
Police were apparently trying to disarm and disperse them.
In the preceding week, 10 people, including policemen and two security guards, were killed.