How does the US count my days for residency?
The count is not a simple total of last year's days. The test weights the current year most heavily and then adds fractions of the two preceding years, so the result depends on a pattern rather than on a single trip. That is why someone who has never spent a long stretch in the United States can still meet it: a habit of regular visits accumulates across the window. It also means the answer changes each year, because the window moves with you. If your travel is at all regular, the count is worth running every year rather than once.
Do short business trips to the US add up?
They do. The test is about presence rather than purpose, so a week at a client's site counts on the same footing as a week on holiday. Because the two preceding years enter the count as fractions, a steady pattern of short trips can reach the point where the test is met while no single year looks remarkable on its own. This catches consultants, sales staff and directors who attend meetings across the border regularly. The practical step is to keep a travel log as you go. Reconstructing years of short trips from passport stamps and expense claims afterwards is possible, but it is slower and less convincing than a record kept at the time.
Can I be a US resident without ever living there?
Under this test, yes. It asks how many days you were present, weighted across the current year and the two before it, and not whether you moved, rented or thought of yourself as living there. Meeting it makes you a US tax resident under domestic law, which changes the scope of what the United States can tax. It is not the end of the analysis. There are routes that can leave you outside US residence despite the count, and a treaty can resolve a residence that two countries both claim. But those are positions to be taken and supported. The day count comes first, because it decides whether you need one.
What records prove how many days I spent in the US?
Start with what was generated at the time. Passport entry stamps, airline and rail itineraries, border crossing histories, hotel folios, card activity and payroll or expense records all place a person somewhere on a date, and together they usually settle a year that memory cannot. Diaries and calendars help where the travel left no other trace, particularly for a drive across the border. Keep the evidence for the current year and the two preceding ones, because the count reaches back into them. The aim is not a perfect record but a consistent one, from which the same total can be reproduced by someone reading it later.
I met the test, so do I now pay US tax on everything?
Meeting the test makes you a resident for US tax purposes, and residence is what extends the reach of the system beyond US-source income. So the exposure is real, but it is not automatic and final. Depending on your facts, a statement asserting that your tax home and your closer ties are in another country may keep you outside US residence, and where two countries each treat you as resident, the treaty has ordered tests to decide which one gives way. Both are positions that have to be documented, and both are easier to support if the analysis is done before the year's returns go in rather than after.
Do days working in the US for a Canadian employer count?
For the day count, yes. Who pays you, where the payroll sits and which country's contract you work under do not change the fact that you were present. Those facts matter a great deal for a different question, which is how the employment income itself is taxed and where relief for the other country's tax comes from, but that is a separate analysis. Keeping the two apart avoids a common mistake: assuming that because the salary is taxed at home, the days do not count. They do, and the residence position that follows from them can affect far more than the salary.
How is tax residency decided?
By facts, not by citizenship or the address on your post. Canada weighs your ties — a home available to you, spouse, dependants, then secondary ties like accounts and licences. The US adds a mechanical day-count test alongside its green-card test. India counts days present under its own thresholds. Where two countries both conclude you are resident, the treaty tie-breaker decides one residence: permanent home, then centre of vital interests, then habitual abode, then nationality. See tax residency.
What is double tax relief and how is it given?
Three mechanisms, and which one you get depends on your residence country's law and the treaty. Exemption leaves the foreign income out of the residence-country base. Credit taxes it and then subtracts the foreign tax, capped at the residence-country tax on that income. Deduction merely reduces taxable income by the foreign tax, and is usually the weakest. Canada and the United States lead with credit; several treaties give exemption for specific income types. See claiming the credit.
