I winter in Florida every year — do I have to file in the US?
Quite possibly, and it has nothing to do with earning anything there. The US day-count test looks at presence, not income, and it reaches back over more than one winter, so a steady pattern of long stays can make you a US tax resident on arithmetic alone. If the count is met, doing nothing is not an option: both ways out of it require a filing. One is a statement that your tax home and closer connection remain in Canada; the other is a treaty position taken when the US claims residence anyway. Which one applies is a question of facts, and the filing follows from it.
What is the closer connection statement and who has to file it?
It is the filing made when the day count is met but your real tax home stayed in Canada. The point of it is to say so, with the facts that support it: where the permanent home is, where the family lives, where the licence, accounts and social ties sit. It is not automatic. Meeting the test and then quietly assuming Canada wins is the most common error we see in this file, because the position exists only once it is filed. It is also a yearly matter rather than a one-off election, so a pattern of long winters means a pattern of filings.
The US says I am a resident but so does Canada — which wins?
That is what the treaty tie-breaker is for. Where both countries would treat you as resident under their own rules, the treaty applies an ordered series of tests to assign residence to one of them for treaty purposes, and the other then taxes you on a narrower basis. Two things matter in practice. First, the outcome is decided by facts you have to evidence, not by preference. Second, taking the position requires a filing in the country that loses the argument; it does not happen quietly without one. A snowbird who has never filed anything in the US has not taken this position.
Does the day count include the winters before this one?
Yes, and that is the part that catches people. The count is not a simple tally of this year's nights. It weights the current year most heavily and then adds fractions of the two preceding years, so consecutive winters of a length that each felt harmless can add up to residence in the later one. This is why the question cannot be answered from a single year's travel. We work from entry and exit records across the whole look-back period, and we recount every year rather than assuming last year's conclusion still holds.
I have no US income at all — is there still a filing?
Yes, if the day count is met. The US test is about presence, and the filing that keeps you out of US residence is required whether or not a dollar of US income exists. It is a position rather than a tax bill: in the ordinary case nothing is payable, and the filing is what prevents the US from treating you as a resident taxable on worldwide income. That asymmetry is what makes the file worth attention. The cost of the filing is modest and agreed in writing before work starts; the cost of being treated as a US resident for a year of worldwide income is not modest at all.
What if I never filed the statement for past winters?
Then the position for those years was never taken, and the first job is to work out what the count actually was in each of them rather than assuming the worst. Some years turn out not to have met the test at all once the records are reconstructed. For the years that did, the filings can generally be made late, and the choice between the closer-connection route and the treaty route is made year by year on that year's facts. We deal with the oldest year first and work forward, because the arithmetic in each year depends on the two before it.
How many days can I spend in a country before I become tax resident?
It depends on the country, and a day count is only ever the start. Many use a threshold in a tax year, some also look at averages across several years, and some have no day test at all and decide on where your home and life are. Two countries can both conclude you are resident, which is what the treaty tie-breaker exists to settle. Counting days without checking the tie-breaker is how people end up filing as resident nowhere. See the residency tie-breaker.
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.
