http://www.washingtonpost.com/business/economy/big-corporations-use-loopholes-dodge-taxes-study/2011/11/02/gIQAIalngM_story.html
"The authors examined the finances of 280 corporations from 2008 through 2010 and found that 30 paid zero taxes or used loopholes to wind up with negative tax rates. Local utility Pepco Holdings paid the lowest rate of all the firms investigated, clocking in at nearly minus 58 percent.
Under the federal tax code, corporations are supposed to pay 35 percent of their profits in taxes. But the study found many of the companies used legal tax breaks that allowed them to pay lower rates than ordinary Americans.
...
The report said that 71 of the companies paid an effective rate of more than 30 percent over the three years. But roughly an equal number paid less than 10 percent."
"The authors examined the finances of 280 corporations from 2008 through 2010 and found that 30 paid zero taxes or used loopholes to wind up with negative tax rates. Local utility Pepco Holdings paid the lowest rate of all the firms investigated, clocking in at nearly minus 58 percent.
Under the federal tax code, corporations are supposed to pay 35 percent of their profits in taxes. But the study found many of the companies used legal tax breaks that allowed them to pay lower rates than ordinary Americans.
...
The report said that 71 of the companies paid an effective rate of more than 30 percent over the three years. But roughly an equal number paid less than 10 percent."