Beckham, who played for Manchester United and Real Madrid, admitted using his mobile phone as he drove his Bentley through central London in November last year, the BBC said.
The 44-year-old was sentenced in Bromley Magistrates Court, it added.
Famous for his devastating free-kicks, he captained England 59 times and scored in three World Cups before retiring from international duty in 2009.
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He also played for LA Galaxy, AC Milan and Paris Saint Germain before he stopped playing club football in 2013 and is currently setting up a Major League Soccer (MLS) team in Miami.
He is married to Victoria Beckham, the former Spice Girl turned luxury fashion designer.
(Reporting by Alistair Smout; Editing by Andrew Heavens)
