John-Thor Dahlburg

Associated Press

European Union Competition Commissioner Margrethe Vestager speaks during a media conference at EU headquarters in Brussels on Tuesday, Aug. 30, 2016. The European Union says Ireland has given illegal tax benefits to Apple Inc. and must now recover the unpaid back taxes from the U.S. technology company, plus interest.

Apple Must Pay up to 13B euros to Ireland

An investigation found Ireland granted such lavish tax breaks to Apple that the multinational's effective corporate tax rate on its European profits dropped from 1 percent in 2003 to a mere 0.005 percent in 2014.