Over €1 billion has already been spent on the new National Children's Hospital.
That's despite almost 18 months to go before building work is due to be finished at the site at St James's Hospital in Dublin.
The cost for the new National Children's Hospital was originally set at €800 million in 2014 before ballooning to €1.4 billion four years later.
In correspondence with the Public Accounts Committee, the Department of Health has confirmed €1 billion - or three quarters of the construction budget - has already been spent according to the Irish Times.
The spending watchdog's chair, Brian Stanley, told a meeting of PAC yesterday that the latest update was concerning given there's potentially another three years to go until its completed.
The project at St James's Hospital has suffered a number of delays, while the main contractor has made claims for additional costs of half a billion euro.
