Manchester United F.C. was never the world's highest-earning football club.
Manchester United F.C. . Manchester United was the highest-earning football club in the world for 2015 -- 16 , with an annual revenue of $ 689 million , and the world 's third most valuable football club in 2015 , valued at # 1.98 billion . As of June 2015 , it is the world 's most valuable football brand , estimated to be worth $ 1.2 billion .