I checked with a tax consultant. Without going into detail I'll share the bottom line. When you are living abroad and technically paying taxes to two different countries, you will never end up paying more taxes than you would have earning the same income and still living in the US. In fact, there is a chance you would pay less total taxes. This is due to a tax exclusion on the first $80000 earned and a foreign income tax credit on taxes paid that exceeds the dollar amount of taxes that would have been paid on the same income earned in the US.