Corporate Income Tax: Most Large Profitable U.S. Corporations Paid Tax but Effective Tax Rates Differed Significantly from the Statutory Rate, GAO-16-363: Published: Mar 17, 2016. Publicly Released: Apr 13, 2016.

“In each year from 2006 to 2012, at least two-thirds of all active corporations had no federal income tax liability. Larger corporations were more likely to owe tax. Among large corporations (generally those with at least $10 million in assets) less than half—42.3 percent—paid no federal income tax in 2012. Of those large corporations whose financial statements reported a profit, 19.5 percent paid no federal income tax that year. Reasons why even profitable corporations may have paid no federal tax in a given year include the use of tax deductions for losses carried forward from prior years and tax incentives, such as depreciation allowances that are more generous in the federal tax code than those allowed for financial accounting purposes. Corporations that did have a federal corporate income tax liability for tax year 2012 owed $267.5 billion. These reasons also explain why corporate effective tax rates (ETR) can differ substantially from statutory tax rates. ETRs attempt to measure taxes paid as a proportion of economic income, while statutory rates indicate the amount of tax liability (before any credits) relative to taxable income, which is defined by tax law and reflects tax benefits built into the law. The statutory tax rate on net corporate income ranges from 15 to 35 percent, depending on the amount of income earned. For tax years 2008 to 2012, profitable large U.S. corporations paid, on average, U.S. federal income taxes amounting to about 14 percent of the pretax net income that they reported in their financial statements (for those entities included in their tax returns)…”