The Commission of Investigation into Mother and Baby Homes is to seek an extension of one year before publishing its final report, which was due next month.
The Irish Times reports the request for an extension has gone to the Government and is expected to be discussed by the Cabinet next week.
It is believed the request is a result of the workload involved in investigating such institutions over the period from 1922 to 1998.
The commission was set up following revelations in 2014 by local historian Catherine Corless about the deaths of almost 800 children at the Tuam mother-and-baby home.
Its remit was extended to examine the records of and practices at an additional 13 such homes as well as four county homes.
The commission was originally due to publish its final report last February but it was granted a one-year extension by the Government.
In an interim report in 2017, the commission said “significant quantities of human remains have been discovered in at least 17 of the 20 underground chambers which were examined” at the Tuam site.