The U.S. has one of the highest federal tax rates in the world at 35 percent, compared with 15 percent in Ireland, and is also home to some of the biggest and most profitable corporations. That said, in 2016 American companies contributed $444 billion (€413 billion) to the U.S. Treasury together, which represents a fifth of the total $2.2 trillion (€2.04 trillion) in federal tax receipts.
The biggest corporate taxpayer last year was Apple, which paid $15.8 billion (€14.7 billion) in income taxes on $59 billion (€55 billion) in operating income – a tax rate of 25.8 percent, which is lower than the statutory 35 percent rate. Microsoft in the year ended June 2016 had $20.1 billion (€18.7 billion) in foreign income and a domestic loss of $300 million (€279 million), while the income tax expense was $3.3 billion (€3 billion) at a rate of 16.5 percent.
Alphabet, the parent company of Google, paid $4.7 billion (€4.37 billion) in taxes at 19 percent tax rate. ExxonMobil, because of the drop in oil prices, had an interesting tax statement in 2016, with earnings before interest and taxes of $4.2 billion (€3.9 billion), net income of $7.8 billion (€7.2 billion) and a $406 million (€378 million) income tax benefit. Among the 30 mega corporations, three companies didn't report new income tax expenses in 2016.