The Trump Tax Cut is Even Worse Than They Say

Jim Tankersley had a nice piece in the New York Times last week pointing out that the tax cut pushed through by the Republicans in 2017 is leading to a sharp drop in tax revenue. While this was widely predicted by most analysts, it goes against the Trump administration’s claims that the tax cut would pay for itself.

Looking at full year data for calendar year 2018, Tankersley points out that revenue was $183 billion (5.6 percent) below what the Congressional Budget Office (CBO) had projected for the year before the tax cut was passed into law. This is a substantial falloff in revenue by any standard, but there are two reasons the picture is even worse than this falloff implies.

The first is that we actually did see a jump in growth in 2018 pretty much in line with what the Trump administration predicted. The tax cut really did stimulate the economy. It put a lot of money in the economy (mostly going to those at the top) and people spent much of this money. The result was that the growth rate accelerated from around 2.0 percent the prior three years to over 3.0 percent in 2018. (We don’t have 4th quarter data yet, which may be delayed by the shutdown, but growth should be over 3.0 percent.)

The jump in growth in 2018 means that the drop in revenue was not due to the economy being weaker than expected, it was due to the fact that the tax rate had fallen by a larger amount than the boost to growth. In fairness to the Trump administration, they had also projected a…

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