barbos
Contributor
Keyword here is "effective" which means "actual" which means "using all available loopholes like Ireland and such"Since the US corporate rate is about the highest in the world this creates a strong incentive not to locate your company HQ in the US if you have international income.
The effective US corporate tax rate is just about the same or maybe even a little lower than the international average.
http://www.forbes.com/sites/taxanalysts/2015/03/25/the-truth-about-corporate-tax-rates/#2eb75cc20a54
https://www.fas.org/sgp/crs/misc/R41743.pdf
Formal corporate tax rate which you pay if you don't hire tax evasion lawyers is much higher than in other countries.
Fact is, sales/VAT tax is the most sensible system if you can implement it.