POTS OF CASH! Daniel Radcliffe, aka Harry Potter.
The Cathedral's famous cloisters have featured extensively in the last six Harry Potter films.
Until now it has never been revealed how much filmmakers paid for the privilege.
Last night Cathedral staff said Warner Bros paid about £100,000 just for the filming of the latest movie, Harry Potter and the Half Blood Prince, which took place in February 2008.
The Dean of Gloucester, the Very Reverend Nicholas Bury, revealed the bill footed by the company every time they filmed at the popular city attraction.
He said: "They pay somewhere in the region of £6,000 to £10,000 a day.
"They pay more for filming days, and less for days they are setting up."
Cathedral operations and marketing manager Bairbre Lloyd said there were set charges for companies filming in historic buildings.
She said: "There are standard filming rates, and for any historic building, filming is a good source of revenue. It's been absolutely wonderful having the filming here. The Cathedral costs £5,000 a day to run, that's paying musicians, and keeping the building open.
"In terms of filming, without that revenue, we have to raise money from other sources. It's a fabulous resource and a great income stream to have."
The films, particularly The Philosopher's Stone and the Chamber of Secrets have also put the Cathedral on the tourism map.
Bairbre added: "With the first two films, we had around 50,000 extra visitors, so it's been really good for us."
The seventh Harry Potter book, The Deathly Hallows, is being filmed in two parts. It is not yet known whether the film crew will be returning to Gloucester.
Gloucester City Council leader and cabinet member for regeneration and culture Paul James said: "It's clearly a nice earner for the Cathedral."