Do travel days count towards the physical presence test?
Only complete days do. The count is of days you are present in a foreign country, and a day broken by international travel commonly fails, because part of it was spent neither in the country you left nor in the one you arrived at. Time in transit over international waters is not presence in a foreign country at all, so a long flight or a sea crossing can cost a day at each end. Travel between two foreign countries is treated more kindly than travel home, but the safe working assumption is that departure and arrival days are not yours to count. For a filer who travels often, this is the difference between passing and failing.
Can the twelve-month period start in the middle of a year?
Yes. The twelve-month period runs from any date, not from the start of the tax year, and part of the work is choosing where to put it. Overlapping periods are allowed, and different periods can be used for different tax years, so a filer who travelled heavily in one stretch may qualify on a window shifted by a few weeks. Two things constrain the choice. The days counted have to fall inside the window you nominate. And the cap available against a tax year depends on how much of that year the qualifying period covers, so the window that maximises the day count is not always the window that produces the better result.
Do trips back to the United States break the test?
They do not reset it, but each day at home is a day you cannot count, and the count is unforgiving. A stretch of home leave, a funeral, a training week at head office and a medical appointment can together take a comfortable position to a failed one, and the test has no exception for the reason you travelled. Because it is mechanical it also has no memory: there is no concept of a temporary absence that is overlooked, as there is in the other qualifying test. Filers whose employment naturally brings them back for meetings often do better relying on residence abroad than on days.
What records prove physical presence if the IRS asks?
Contemporaneous documents that place you somewhere on a date. Passport stamps and electronic border records are the backbone, with boarding passes, itineraries and hotel folios filling the gaps that stamps leave, particularly inside travel areas where no stamp is given. Payroll and timesheet records showing where the work was performed corroborate the pattern, and a lease, utility bills and local bank activity show the base you were returning to. A schedule built years later from memory is not evidence; a schedule built from those documents, with each entry traceable, is. Assemble it while the sources still exist, because the question usually arrives long after the year in question.
Is the physical presence test easier than bona fide residence?
It is more certain, which is not the same thing. Presence is counted, so once the travel record is assembled you know the answer, and it does not depend on intentions, ties or how an assignment is described. That suits a posting with a fixed end date, which is precisely the profile that struggles to look like genuine residence. The trade-off is rigidity: a residence-based claim survives ordinary absences that a day count will not, and the count has to be re-established for every period you rely on. Filers who stay put tend to prefer residence; filers on a defined assignment who rarely travel tend to prefer days.
Can I pass the day count and still lose the exclusion?
Yes, and it is the failure people least expect. Presence is one requirement; having your tax home in a foreign country is a separate one, and both have to hold. Tax home follows your main place of business or employment, and it is displaced if your abode remains at home, which is judged on family, personal and economic ties rather than on days. So a filer who works abroad but keeps the family home, the family and the centre of their life at home can count every day correctly and still be refused. Where that is the picture, the credit for foreign tax is usually the relief to work with instead.
Is double taxation legal?
Yes. Nothing prevents two countries from taxing the same income under their own domestic law — each is exercising its own jurisdiction. What treaties and credit systems do is relieve the outcome rather than prohibit the charge, and relief is generally something you must claim on a return or a form, not something applied automatically. Miss the claim and the double charge stands. Double taxation explains the mechanism.
What happens if the two countries disagree about which of them can tax me?
The treaty has a procedure for exactly that. You apply to the competent authority in your residence country, which takes the case up with its counterpart, and the two negotiate a position that removes the double taxation. Some treaties add binding arbitration if they cannot agree. It is slow and it runs on documents, so the practical work is preserving the record and filing protective claims while the clock runs. See our treaty work.
