From your other comments it seems like you're well versed in this stuff, but here there's some missing nuance. Most countries have double taxation treaties. 1

From your other comments it seems like you're well versed in this stuff, but here there's some missing nuance. Most countries have double taxation treaties. 1. If the tax rate is lower in your host country, you pay tax on income greater than 100K minus whatever tax you paid in your host country. Let's call the US tax rate 35 and the host country 30%, and your income 110: You pay 5% to the US, e.g. 500 USD (plus, probably a similar amount to a tax advisor) 2. If the tax rate is higher in your host country, you deduct your host countries taxes from your US tax and only pay the tax advisor.