I wonder if that "due to high taxes" causal explanation can be quantified a bit better. Not every person who renounces U.S. citizenship does so for tax reasons.

I wonder if that "due to high taxes" causal explanation can be quantified a bit better. Not every person who renounces U.S. citizenship does so for tax reasons. I could believe it's 98% though, or maybe 80%; I have no idea. Is there any way to estimate the proportion who renounce for various reasons? A non-tax category in which I know people who've renounced is those who have issues with dual citizenship. Denmark, for example, does not permit dual citizenship. So if you are an American who moves to Denmark and eventually wishes to naturalize, you must renounce your American citizenship. Perhaps more commonly, if you are born with dual Danish-American citizenship (Danish parents but born in the U.S.), you can keep the dual citizenship until age 22, but then at age 22 must apply for permanent Danish citizenship, and at least officially they will, as with the naturalization case, require you to renounce your American citizenship (though in practice it seems not everyone actually does so).