[1] RailCorp was converted into a state-owned corporation and renamed the Transport Asset Holding Entity (TAHE) on 1 July 2020.

[2][3][4] Until its conversion to TAHE, RailCorp held rail property assets, rolling stock and rail infrastructure in the Sydney metropolitan area and limited country locations in the state and it makes these assets available to Sydney Trains and NSW TrainLink for their operations.

From July 2013, operation and maintenance functions were transferred to the newly created Sydney Trains and NSW Trains agencies, which were also subsidiaries of RailCorp, leaving RailCorp as the legal owner of a portfolio of $28.6 billion of railway property, mostly within the metropolitan area.

[7] In January 2004, after much criticism and public perceptions of blame shifting between units of the State Rail Authority for operational failings, RailCorp was formed taking over the passenger train operations of CityRail and CountryLink, and responsibility for maintaining the greater metropolitan network from the Rail Infrastructure Corporation.

[7] RailCorp was converted into a state-owned corporation and renamed Transport Asset Holding Entity (TAHE) on 1 July 2020.

The Residual Transport Corporation (RTC), which was formed in July 2017, would then own assets not suitable for TAHE ownership.

Formerly known as the State Rail Fire Service, the unit is based in Sydney and respond to emergency incidents involving the rail network including automatic fire alarms within the underground and nearby stations.