Spectators, teams and race organisers spent an estimated £88 million while media coverage generated a further £35 million, Transport for London (TfL) confirmed as fans flocked to watch the opening ceremony, time trial and stage one on the weekend of 6, 7 and 8 July.
Organisers were paid £1.5 million to hold the start in London. Talks have begun to see it return before the 2012 Olympics.
Mayor Ken Livingstone said: "The Tour has generated well over £100 million in spending and publicity, which will in turn attract more visitors and encourage the organisers of future sporting events to choose London."
London's transport commissioner, Peter Hendy, said: "We are working to bring the Tour back to London as soon as possible.
"The Tour organisers, media, riders and spectators said it was the greatest start the Tour had ever had."
