Federal income tax: Who doesn't pay it and why?

The 46 percent of Americans who don't pay federal income tax can be divided into those who have no taxable income and those who have enough tax breaks to wipe out their tax liability.

In this March 2010 file photo, David Savory (right) helps Bouchra Bouzidi (left) file her taxes as part of the Volunteer Income Tax Assistance Program (VITA) at Bunker Hill Community College (BHCC) in Boston, Mass. Williams projects that the percentage of Americans who pay no federal income tax will fall below 40 percent by the end of the decade.

Mary Knox Merrill/The Christian Science Monitor/File

September 19, 2012

The percentage of Americans who don’t pay income tax is making headlines again. However, the story hasn’t changed since I blogged about it last year and my TPC colleagues and I analyzed why in a longer paper. In 2011, 46 percent of tax units paid no federal income tax. Half of them had no taxable income—the standard deduction and personal exemptions exceed their income.  The other half get enough tax breaks to wipe out their basic tax liability.

It’s worth noting that the percentage has changed over time, rising and falling as the economy fluctuates and Congress enacts short-term stimulus tax cuts. Looking forward, we project that the percentage will fall below 40 percent by the end of the decade, even if Congress makes the Bush-era tax cuts permanent.