Introduction
Tax Day, April 15, is looming for the nearly 142 million Americans who will file a tax return for income earned in 2009. While most taxpayers worry about paying the correct amount and even pay for professional assistance to make sure they do, many millions of tax filers will be "nonpayers."
A nonpaying tax return is one filed by an individual or couple who, thanks to legal credits and deductions, owes nothing. Most people who get a refund after filing their tax returns are not nonpayers; they have overpaid their taxes through paycheck withholding and are being refunded just a tiny portion of that payment.
But during 2008, more than a third of all tax returns resulted in complete nonpayment; that is, people got back every dollar that was withheld from their paychecks during the year. Many got quite a bit more, turning Tax Day into a payday.
Two Records Set in 2008: Most Nonpayers and Highest-Earning Nonpayers
Nonpaying status used to be a sure sign of poverty or near-poverty, but Congress and the President have changed the tax laws to pull much of the middle class into the growing pool of nonpayers. The income level at which a typical family of four will owe no income taxes has risen rapidly, now topping $51,000.
As a result, recently released IRS data for the 2008 tax year show that a record 51.6 million filers had no income tax obligation.[1] That means more than 36 percent of all Americans who filed a tax return for 2008 were nonpayers, raising serious doubts about the ability of the income tax system to continue funding the federal government's ballooning expenditures.
http://www.taxfoundation.org/publications/printer/25962.html
link has a lot more details, a pretty graph, a couple tables etc.
the numbers have increased dramatically over the last 10 years, for both percentage of nonpayers and the top income of nonpayers.
discuss.