Qatar has no US tax treaty, no totalization agreement, and no tax on your pay.

Doha packages routinely include housing, school fees and a flight allowance. Every one of those is compensation on the US return. School fees for your children are the item people are most surprised by, and they raise the amount the exclusion has to cover.

Rotational schedules are common in energy and aviation, and they are the fastest way to fail the 330-day physical presence test without noticing. Days in the United States count against you whatever the reason for them, so the qualifying twelve months has to be chosen from your actual travel record.

If the physical presence test is out of reach, the bona fide residence test may still be available — it turns on the nature and intent of your stay rather than a day count. That is a judgement call, and it is one of the things worth fifteen minutes on a call.

Qatar's Labour Law entitles an employee who completes a year of continuous service to an end-of-service gratuity of at least three weeks' basic salary for each year worked, pro-rated for part of a year. It is calculated on basic salary alone, so the allowances that inflate your US income do not raise it — and on the US side it is compensation for services performed abroad, attributed to the years it was earned rather than the year it was paid.

Qatar's social insurance scheme covers Qatari nationals, so nothing is withheld from an expatriate salary that could be mistaken for a creditable tax. The flip side is the missing totalization agreement: an employee pays no US Social Security on a Qatari salary, but anyone invoicing for their own services pays 15.3% self-employment tax with no relief.