The National Audit Office has offered an estimate of the IT costs of the Olympic Games in a report released on July 20.
The Commons Public Accounts Committee revealed earlier this month that IT had not been budgeted for when London's bid was made. The overall budget has been revised from £3.3bn to £9.3bn.
The MPs were probing a £900m increase on the original figure, which included £400m towards the costs of an IT system for the planned Olympic Park.
The report also said that the Olympics Delivery Authority's programme management costs have increased from £16m to £570m, and the NAO said £132m of this was for "IT, rent, other property, communications and other overheads, plus a relatively small amount for planning development control covering the running of the Delivery Authority's planning authority function".