The calculations take into account numerous factors like all the assets ( including players, stadium, infrastructure) plus revenue sources & potential. For example Real Madrid has extended its deal with a sporting wear company & new sponsorship from an International Airline. Real Madrid plans to renovate its stadium & add more seats which will also lift revenues. Lastly, Real Madrid has 93.000 members which pay annually around 195€, which is an excellent source of stable income.
The other Spanish Football Club which makes a notable jump is FC Barcelona from Nº 8 in 2012 to Nº 3 in 2013 with 2.6 Billion US$ in value.
Below is the Top 10 list for 2013 according to Forbes:
|courtesy of "Forbes"|