For a job after university probably, but I meant to speak to a tuition waiver at a foreign university. I doubt tuition waiver plus stipend would approach that in most other countries.

Even for the job scenario, you get a tax credit for foreign taxes paid which in most industialized countries would probably neutralize any US tax burden and then some. If the job is in a developing country, I would think the cost of living advantages would make it worth it if you were above the limit.

However, not a CPA or finance pro. I went to grad school abroad and looked into the implications of staying a bit.