According to Visit Britain, the British Monarchy generates over £500 million a year through attracting overseas tourists.

(British culture and heritage, from theatres and galleries, to pubs, Premiership Football, castles and stately homes – generated £4.6 billion in total spending by overseas tourists in 2009, and supported 100,000 jobs, the report said. But within that total one-in-eight of those sites – ranging from the Tower of London to The Palace of Hollyroodhouse in Edinburgh and Ruthin Castle in Wales – are associated with the Monarchy. The report reveals that foreign tourists who visited them generated £500 million of spending, directly and indirectly. I wonder if they’d still come even if there was no monarchy?)