Some folks where I work travel overseas, and while I don't know all the specifics, here are some of the tidbits I've overheard. The first 90-92k are (federal) tax free if you spend 330(?) days out of a year overseas. I don't think it has to be the same fiscal year, i.e., leave in July, come back next July. This is defense contractor stuff, not sure if it applies to all sectors. Sorry I don't have more details, working overseas can be very lucrative depending on your industry.