[justlurking]

The graphs seem improbable to me, because with the Earned Income Tax Credit and other Federal Transfer Payments, I’m pretty sure the bottom 20% have a net negative tax rate.

You are correct. But, it looks like the graphs showing the share of taxes stops at zero.

I switched out a graph at the last moment, substituting total federal taxes for individual income taxes. It shows the net negative tax rates for the bottom forty percent (at least in 2007):

[Uncle Miltie]

Aha. As expected, the bottom 40% are net TAKERS not Tax Payers!