The European Commission, the EU's executive arm, said under the new rules big companies operating in Europe would have to make public what they earn in each member state of the 28-nation bloc.
Country-by-country reporting has for years been a major demand of tax activists who accuse big corporations of secretly shifting profits from major markets to low tax jurisdictions, often through the use of shell companies such as those exposed in the Panama Papers leaks.
Longstanding criticism of corporate tax policy blew up into the open with the Lux Leaks scandal in 2014, which exposed the secret sweetheart tax deals given to huge corporations --including the likes of IKEA and Pepsi -- by the small duchy of Luxembourg.
Hill is Britain's representative on the Commission and a close political ally of Prime Minister David Cameron, who is under pressure in London for family links to an offshore fund exposed in the Panama Papers.