The London 2012 Games have come in more than £350 million under budget.
Government figures released show that is the saving from the overall budget of £9.3 billion.
But none of that money will be used for installing the retractable seats in the Olympic Stadium - said to be vital if it is to be a base for a football club, as well as athletics.
So, where does that money go and who will pay for the stadium's conversion?
Here's our Political Correspondent Simon Harris.
The London 2012 Games are set to come in under budget, figures from the Government’s final quarterly economic report show.
The reworking of the Olympic Park has begun and The London 2012 Organising Committee and the LLDC are marking the handover of the park.