Citizens for Tax Justice, America’s Tax System Is Not as Progressive as You Think:

Conservative lawmakers and pundits often claim that the richest Americans are paying a disproportionate share of taxes while a huge number of lower-income Americans pay nothing at all. They’re wrong.

It’s true that the very rich pay a large share of federal income taxes, and that many taxpayers are too poor to owe any federal income taxes. But federal income taxes are only part of the picture. Other types of taxes, like federal payroll taxes, federal excise taxes, and state and local taxes are regressive, meaning they take a larger share of income from a poor or middle-class family than they take from a rich family.