Bernard Arnault, France's wealthiest businessman and boss of the LVMH luxury house, has applied for Belgian citizenship, it is reported.
La Libre Belgique newspaper reported that Mr Arnault's citizenship application was confirmed by the head of Belgium's naturalisation office.
French media drew a connection to French president Francois Hollande's plan to raise the tax rate on France's highest earners to 75%.
But tax experts said obtaining Belgian citizenship would not change Mr Arnault's tax situation, which is determined by residence, not citizenship.
Mr Arnault has been critical of the tax plan and many in France's right-wing UMP opposition party have warned it could drive entrepreneurs out of the country.