Investopedia: How Fortune 500 Companies Avoid Paying Income Tax

The Institute on Taxation and Economic Policy (ITEP), in a recent study, found that over the eight-year period from 2008 to 2015, 258 profitable Fortune 500 companies paid an average effective federal income tax rate of 21.2%. Over that same period, exactly 18 companies, including General Electric, International Paper, Priceline.com and PG&E Corp., avoided paying a single penny of federal income tax.