How Many Days Can a Canadian Snowbird Spend in the US?

There’s no flat 182-day number, and the one the snowbird press keeps repeating can put you on the wrong side of a US tax return. US tax residency runs on a weighted three-year formula: every US day this year, a third of last year’s, a sixth of the year before. Keep the same pattern every winter and the line sits at 121 days. Go past it and you’re a US tax resident for the year unless you claim an exception, on time, on the right form.

Who is this page for, exactly?

A Canadian who keeps a home in Canada, spends part of the winter in the US, and doesn’t work there. Florida, Arizona, Texas and the Carolinas are the usual shape, but the day count runs the same way for anyone crossing on a regular pattern. If you’ve actually moved to the US, or you’re about to, the first-year rules are different and they live on their own pages.

• If you’re moving on a TN and becoming a US resident on purpose, that’s the first-year filing stack, and this page isn’t it.
• If you’re leaving Canada for good, the deemed disposition on the way out is its own event.
• If you’re not sure whether you’re still a Canadian tax resident, start there and come back.

Two things this page deliberately doesn’t answer. How long US immigration will admit you for is a separate rule set with its own limits, and nothing below changes it. Nor does anything below tell you how many days your provincial health plan needs you in the province. Both matter to a snowbird and neither is a tax question, so don’t take a number from here into either conversation.

What actually decides whether a snowbird owes a US tax return?

Four things, in this order: how many days you were in the US over three years, whether any of those days are excluded, whether you qualify for the closer connection exception, and whether you filed the form that claims it. The first two are arithmetic. The third is facts. The fourth is a deadline, and it’s the one that turns a winnable position into a lost one.

Step	What happens	Trigger	Form	Where it’s covered
1	Count your US days for three calendar years	Physical presence at any time on a day	None	This page
2	Take out any excluded days	Falling inside one of the five narrow categories the IRS lists on its substantial presence test page	Form 8843 for exempt individuals and medical cases	This page
3	Run the weighted test: current year at 1, first prior at a third, second prior at a sixth	Any three-year window ending in the year you’re testing	None	The calculator
4	If you meet it, test the closer connection exception	Under 183 current-year days, foreign tax home, closer connection	Form 8840	This page
5	If the exception is barred or blown, fall back to the treaty	Residency under both countries’ own laws	Form 1040-NR with Form 8833	This page
6	Check what the position does to your account reporting	US resident status for purposes other than computing income tax	FBAR, and Form 8938 unless its carve-out applies	This page

Steps 4 and 5 are not interchangeable. The exception keeps you outside US residency; the treaty accepts that you’re inside it and then argues about which country gets to tax you. The second one costs a US return.

How many US days can a Canadian snowbird spend?

If you spend roughly the same number of days in the US every year, 121 is the practical line and 122 meets the test. The weighted sum of an even pattern is days times 1.5, because you count all of the current year, a third of the first prior year and a sixth of the second prior year. So 122 times 1.5 is exactly 183, and 121 times 1.5 is 181.5. That holds only for an even pattern with no excluded days, and the 31-day prong has to be met on its own.

US days, same each year	Current year	First prior year, at a third	Second prior year, at a sixth	Weighted total	Meets the test
100	100	33.33	16.67	150	No
120	120	40	20	180	No
121	121	40.33	20.17	181.5	No
122	122	40.67	20.33	183	Yes
150	150	50	25	225	Yes
182	182	60.67	30.33	273	Yes

The statute sets both prongs. Under IRC 7701(b)(3)(A), you meet the substantial presence test if you were present in the US on at least 31 days during the calendar year, and if the sum of your days across the current year and the two preceding calendar years, multiplied by the applicable multiplier, “equals or exceeds 183 days”. The multiplier table is 1 for the current year, a third for the first preceding year, a sixth for the second preceding year. The IRS states the same test in plain words on its substantial presence test page.

Note what the 183 in that formula is. It’s a weighted total across three years, and it is not a count of this year’s days. The number 183 shows up again later, in the closer connection exception, and there it does mean actual current-year days. Two different tests, same number, and mixing them up is how people talk themselves into a position they don’t have.

The statute supplies no rounding convention, but the regulation under it does, and it settles the question the way the table above already assumes. Under 26 CFR 301.7701(b)-1(c)(1), “any fractional days resulting from the above calculations will not be rounded to the nearest whole number”. The fractions stay fractions, and the comparison to 183 is made on the exact figure. That’s why 121 days a year stops at 181.5 and stays under, while 122 lands on 183 and meets it.

Why is the 182-day answer wrong?

Because the test doesn’t look at one year. It adds all of the current year’s US days to a third of the first prior year’s and a sixth of the second prior year’s, and asks whether the total reaches 183. So your current-year count can sit well under 183 while the three-year total sails past it. A retiree who spent 180 days in each of the last two winters and cut this winter to 100 days still lands at 190 weighted days and meets the test.

“You were physically present in the U.S. on 120 days in each of the years 2023, 2024 and 2025. To determine if you meet the substantial presence test for 2025, count the full 120 days of presence in 2025, 40 days in 2024 (1/3 of 120), and 20 days in 2023 (1/6 of 120). Since the total for the 3-year period is 180 days, you are not considered a resident under the substantial presence test for 2025.”

That’s the IRS’s own worked example, and it’s the one that gets misread. People see 120 days and 180 total and conclude there’s a wide margin, when the margin is two days a winter.

The carry-in runs the other way too. Cut back hard after two heavy years and the heavy years keep counting, at a third and a sixth, for two more years after they end. That’s the case where “I was only there four months this year” is true and irrelevant.

What counts as a day in the United States?

Any day you’re physically present in the US at any time counts as a full day, so an afternoon across the border is a day, and so are arrival day and departure day. The IRS’s substantial presence test page takes out five narrow categories of day, and none of them was written for a retiree on vacation. A snowbird driving to Florida for the winter counts every one of those days.

• Days you regularly commute to work in the US from a home in Canada or Mexico.
• Days you’re in the US for less than 24 hours while in transit between two places outside the US.
• Days you’re in the US as a crew member of a foreign vessel.
• Days you couldn’t leave the US because of a medical condition that arose while you were there.
• Days you were an exempt individual.

All five come from the IRS substantial presence test page, and the last one is the most misread word on it. “Exempt individual” doesn’t mean someone exempt from US tax. The IRS gives the term four categories and nothing else: foreign government-related individuals on A or G visas (other than A-3 and G-5), teachers and trainees on J or Q visas, students on F, J, M or Q visas, and professional athletes competing in a charitable sports event. A retired Canadian on a visitor status is in none of them.

The medical exception is narrower than it sounds as well. It covers a condition that arose while you were in the US, so a flare-up of something you flew down with is a different argument. And excluding days as an exempt individual or on medical grounds isn’t automatic paperwork-free relief: the IRS says you have to file Form 8843 to exclude those days, and that a late Form 8843 costs you the exclusion unless you can meet the same clear and convincing standard described further down this page.

What is the closer connection exception, and what does it require?

It’s the rule that lets someone who meets the substantial presence test still be treated as a nonresident alien for the year, and it has three conditions that all have to hold. Fewer than 183 days of US presence in the current year. A tax home in a foreign country. And a closer connection to that same country than to the United States. Miss any one of them and the exception isn’t available for that year.

“An alien individual who meets the substantial presence test may nevertheless be considered a nonresident alien for the current year if the following conditions are satisfied: (1) The individual is present in the United States for fewer than 183 days in the current year; (2) The individual maintains a tax home in a foreign country during the current year; and (3) Except as provided in paragraph (e) of this section, the individual has a closer connection during the current year to a single foreign country in which he or she maintains a tax home than to the United States.”

That’s 26 CFR 301.7701(b)-2(a), and the statutory version sits at IRC 7701(b)(3)(B).

“Tax home” is the piece that trips retirees, because it sounds like it needs a job. It doesn’t. The regulation puts your tax home at your regular or principal place of business, and then says that if you have no regular or principal place of business because you aren’t carrying on a trade or business within the meaning of section 162(a), your tax home is “the individual’s regular place of abode in a real and substantial sense”. For a retired Canadian, that’s the Canadian house. The statute reaches the same definition by pointing at section 911(d)(3).

Two conditions on that tax home are easy to miss. It has to be in existence for the entire current year, including the months you’re in Florida. And it has to be in the same foreign country you’re claiming the closer connection to. Sell the Canadian house in June, rent nothing in its place, and the whole-year requirement is a live question for that year.

The closer connection itself is facts and circumstances, and the regulation’s list runs to ten items without closing. It names where your permanent home, family and personal belongings are, where your social, political, cultural or religious organizations sit, where you do routine banking and conduct business, where you hold a driver’s licence and vote, and what you put down as your country of residence on official forms. The list is prefaced with “include, but are not limited to”, and the regulation lets the IRS establish the connection as well as the taxpayer, so it cuts both ways.

On the permanent home the regulation helps a snowbird: it’s immaterial whether the home is a house, an apartment or a furnished room, and immaterial whether it’s owned or rented. What matters is that the dwelling “be available at all times, continuously, and not solely for stays of short duration”. A Canadian house you keep year-round qualifies, and so, on the same words, does a Florida condo you own and could occupy any time. Owning on both sides makes the comparison closer rather than clearer.

When can I not use the closer connection exception?

Three bars, and the first catches people who treat 183 as a rounding error. It’s unavailable in any year you were present in the US for 183 or more actual days in that year (the current-year count, not the weighted three-year total). It’s unavailable if you’re already a lawful permanent resident. And it’s unavailable if at any time during the year you applied for a green card, took other affirmative steps to apply for one, or had an application pending to adjust your status. Form 8840’s instructions add a fourth: a US tax home at any time in the year rules it out.

• Form I-508, Waiver of Rights, Privileges, Exemptions and Immunities.
• Form I-485, Application to Register Permanent Residence or Adjust Status.
• Form I-130, Petition for Alien Relative.
• Form I-140, Immigrant Petition for Alien Worker.
• Form ETA-750, Application for Alien Employment Certification.
• Form OF-230, Application for Immigrant Visa and Alien Registration.

All six sit in the regulation itself rather than only on an IRS web page. 26 CFR 301.7701(b)-2(f) lists them at paragraphs (1) to (6) as affirmative steps to change status to that of a permanent resident, on a list it prefaces with “include, but are not limited to”. The IRS repeats them on its closer connection exception page as filings that indicate intent to become a lawful permanent resident. IRC 7701(b)(3)(C) writes the bar into the statute for a pending adjustment application or “other steps to apply” for that status, and it bites if either happened at any point in the year, including months after you drove home.

That timing matters more than it looks. A snowbird whose adult child sponsors them mid-year, or who starts a green card process in November after a full winter in Arizona, has lost the exception for the whole of that year, retroactively, including the months before the filing. If a green card is anywhere in the family plan, look at the day count for that year before the immigration paperwork goes in.

What is Form 8840, and when is it due?

Form 8840, Closer Connection Exception Statement for Aliens, is how the claim gets made. If you’re filing a Form 1040-NR, the 8840 attaches to it. If you don’t have to file a US return at all, which is the usual snowbird case, you mail the 8840 by itself to the IRS by the due date, including extensions, for filing a Form 1040-NR. For someone with no US wages subject to withholding, that return is due the 15th day of the 6th month after the tax year ends, which is June 15 for a calendar year.

Your situation	What you file	Deadline
You aren’t required to file a Form 1040-NR for the year	Form 8840 on its own, mailed to the IRS	The 1040-NR due date, including extensions: the 15th day of the 6th month, June 15 for a calendar year, or the next business day if that falls on a Saturday, Sunday or legal holiday
Filing a Form 1040-NR, no US wages subject to withholding	Form 8840 attached to the return	The 15th day of the 6th month, June 15 for a calendar year, including extensions, or the next business day if that falls on a Saturday, Sunday or legal holiday
Filing a Form 1040-NR, with US wages subject to withholding	Form 8840 attached to the return	The 15th day of the 4th month, April 15 for a calendar year, including extensions, or the next business day if that falls on a Saturday, Sunday or legal holiday
Married couple, both wintering in the US	One Form 8840 each, on whichever of the three rows above fits each spouse	Each spouse’s own filing carries its own deadline

That table turns on one question and then a sub-question: do you have to file a Form 1040-NR for the year, and if you do, were your US wages subject to withholding. Find yourself in exactly one of the first three rows.

Two mechanics people get wrong. The 8840 is per person, so a couple files two, and the instructions say each alien individual must file a separate one. And the form is short but not casual: Part I asks for your visa type, citizenship, passport numbers, and your day counts for all three years, and Part IV asks a page of questions about where your home, family, belongings, cars, banking, licences, voting and health coverage sit. That’s the closer connection evidence, written down by you, and on the standalone route you sign it under penalties of perjury.

The regulation that requires the form is 26 CFR 301.7701(b)-8. It says an individual who otherwise meets the substantial presence test must file a statement explaining the basis of the claim, that the statement must be “a fully completed Form 8840”, and that someone not required to file a return files the statement standalone by the nonresident return due date including extensions. The filing address printed in that regulation is out of date; take the address from the current Form 8840 instructions instead.

There’s a calendar problem hiding in the June 15 date, and it’s the reason this page exists in the shape it does. A snowbird is usually back in Canada by April doing the Canadian return, and the US form nobody mentioned is due two months later. If the 8840 isn’t on the same checklist as the T1, it gets missed in exactly the year it’s needed.

What happens if I file Form 8840 late, or never file it?

You lose the exception, and every US day goes back into the count. The regulation says an individual who fails to file the statement on time “will not be eligible for the closer connection exception” and “will be required to include all days of presence in the United States” for the substantial presence test. Form 8840’s own instructions put it the same way: file late and you’re not eligible to claim the exception and may be treated as a US resident.

“If an individual is required to file a statement pursuant to paragraph (a)(1) … and fails to file such statement on or before the date prescribed by paragraph (c) of this section, the individual will not be eligible for the closer connection exception described in 301.7701(b)-2 and will be required to include all days of presence in the United States … for purposes of the substantial presence test and for determining the individual’s residency starting and termination dates.”

There are two ways back, and neither is a second deadline.

The first is in the regulation itself. The consequence doesn’t apply if you can show “by clear and convincing evidence” that you took reasonable actions to become aware of the filing requirements and significant affirmative steps to comply with them. Clear and convincing is a real standard, and “nobody told me” is not evidence of steps taken.

The second is discretionary, and it belongs to the government. Under 26 CFR 301.7701(b)-8(e), the Secretary or a delegate may, in their sole discretion, when it is in the best interest of the government and based on all the facts and circumstances, disregard the failure to file on time. Every operative word there is permissive, so treat it as a power the IRS may exercise and never as something to plan around.

Now the part almost nobody publishes. The same regulation says that if you’re treated as a US resident because of the late filing, and you’re also a resident of a treaty country under that treaty, you get handled under 26 CFR 301.7701(b)-7(a). That’s the dual-resident rule, which is the treaty tie-breaker. So a blown 8840 doesn’t end the story; it moves you from a form you could have mailed to a US tax return you now have to file.

Can the treaty still make me a Canadian resident if I meet the test?

Often, yes, and it’s the fallback once the closer connection exception is gone. If each country’s own law makes you a resident, Article IV(2) of the Canada-US treaty breaks the tie through an ordered cascade that the Canadian residency guide walks through step by step; the operative text is quoted below. A snowbird who owns the Florida place is likely to have a permanent home available in both countries, in which case the first step doesn’t decide it and the question moves to the next one.

“Where by reason of the provisions of paragraph 1 an individual is a resident of both Contracting States, then his status shall be determined as follows: (a) He shall be deemed to be a resident of the Contracting State in which he has a permanent home available to him; if he has a permanent home available to him in both States or in neither State, he shall be deemed to be a resident of the Contracting State with which his personal and economic relations are closer (centre of vital interests); (b) If the Contracting State in which he has his centre of vital interests cannot be determined, he shall be deemed to be a resident of the Contracting State in which he has an habitual abode; (c) If he has an habitual abode in both States or in neither State, he shall be deemed to be a resident of the Contracting State of which he is a citizen; and (d) If he is a citizen of both States or of neither of them, the competent authorities of the Contracting States shall settle the question by mutual agreement.”

That’s the operative text of Article IV(2) in the Canada-United States Tax Convention Act. The paragraph before it, Article IV(1), which sets who counts as a resident of each country in the first place, was replaced by the 1995 protocol and now reads at Schedule IV of the same Act.

Taking that position is not free, and the price is the thing to weigh. Under 26 CFR 301.7701(b)-7, an individual who determines their US tax liability as a nonresident on the strength of a treaty tie-breaker has to file a Form 1040-NR by the nonresident due date, computing the liability as a nonresident, with a fully completed Form 8833 attached. Skip the 8833 and the same regulation points at the section 6712 penalty.

And the relief the treaty gives is bounded on its face. The regulation says the individual is treated as a nonresident alien “for purposes of computing that individual’s United States income tax liability”. It then says that generally, for purposes of the Code other than that computation, the individual is treated as a United States resident. So a won tie-breaker settles the income tax question and leaves a residual layer of US resident status behind it.

	Closer connection exception	Treaty tie-breaker
Available at 183 or more current-year US days	No	Yes, if you’re a resident of both countries under their own laws
Form	Form 8840	Form 1040-NR with Form 8833 attached
Do you file a US return	Not required by the exception itself	Yes, a Form 1040-NR for the year
What it decides	You aren’t a US resident for the year	You’re a US resident whose income tax is computed as a nonresident
Status for other Code purposes	Nonresident	Generally still a US resident, under 26 CFR 301.7701(b)-7(a)(3)
Cost of missing the deadline	Exception lost, all days counted back in	Section 6712 penalty for the missing disclosure

If the treaty makes me a Canadian resident, do the US account reports go away?

Not all of them, and the two big ones go opposite ways. Form 8938’s instructions carry an express carve-out: a specified individual filing as a nonresident alien at the end of the year isn’t required to report specified foreign financial assets for the part of the year covered by a Form 1040-NR, provided the 1040-NR is filed on time with a Form 8833 attached. The FBAR carries no equivalent carve-out, and the IRS says so in terms: tax treaties with the US do not affect FBAR filing obligations.

	Form 8938	FBAR (FinCEN Form 114)
Express dual-resident carve-out	Yes, in the form’s instructions	No. The IRS says tax treaties with the US do not affect FBAR filing obligations
Condition on the carve-out	Timely Form 1040-NR with Form 8833 attached	n/a
Scope of the carve-out	The part of the year covered by the Form 1040-NR	n/a
Who counts as a US resident	Green card test or substantial presence test	A resident alien under IRC 7701(b) and the regulations under it

The FBAR chain is worth walking, because it’s short and it’s the reason the answer splits. 31 CFR 1010.350(b)(2) defines a resident of the United States as “an individual who is a resident alien under 26 U.S.C. 7701(b) and the regulations thereunder”, with a different geographic definition of the United States. One of those regulations is 26 CFR 301.7701(b)-7, and its paragraph (a)(3) says that for purposes other than computing income tax, a treaty tie-breaker winner is treated as a United States resident. Nothing in the FBAR rule or in that regulation carves the FBAR out the way the Form 8938 instructions carve out Form 8938. The IRS closes the loop itself. Its FBAR Reference Guide, Publication 5569, works an example of a treaty resident of another country and ends it flatly: “Tax treaties with the U.S. do not affect FBAR filing obligations.” The example’s taxpayer is a green card holder rather than a snowbird, but that closing sentence is written as a general rule.

The FBAR itself applies where a US person had a financial interest in or signature authority over foreign financial accounts whose aggregate value topped $10,000 at any time in the calendar year, and it’s due April 15 with an automatic extension to October 15, per the IRS FBAR page. For a Canadian retiree, chequing, savings and investment accounts reach that aggregate quickly, and registered accounts are worth checking against the rule rather than assuming either way.

On the ordinary snowbird facts, none of this bites on someone who successfully claims the closer connection exception, because that person isn’t a resident alien for the year and so isn’t a US person under the FBAR definition either. One qualifier on that, and it’s the geography. The same IRS guide applies the residency tests using a wider United States that takes in Puerto Rico, Guam, the US Virgin Islands, the Northern Mariana Islands and American Samoa, so the day count feeding the FBAR definition isn’t the same day count as the tax one. Where it does bite hardest is on the person who fell back to the treaty. That asymmetry is the strongest practical argument for filing the 8840 on time rather than treating it as optional. If you want the account side worked through as well, what happens to registered accounts once US residency is in play covers the RRSP and TFSA end of it.

Does wintering in the US do anything to my Canadian tax residency?

On its own, no. The CRA’s own guidance names “spending part of the year in the U.S., for example, for health reasons or on vacation” as one of the patterns that keeps you a factual resident of Canada, so long as you maintain residential ties. Canadian residency runs on ties rather than a day count, and the significant ones are a home in Canada, a spouse or common-law partner in Canada, and dependants in Canada.

• Personal property in Canada, such as a car or furniture.
• Social ties, such as memberships in Canadian recreational or religious organizations.
• Economic ties, such as Canadian bank accounts or credit cards.
• A Canadian driver’s licence, a Canadian passport, and provincial or territorial health insurance.

Those are the CRA’s secondary ties, from its residency status page, and a snowbird who keeps a Canadian house usually keeps most of them without thinking about it. That’s a good thing here: the same facts that hold your Canadian residency in place are the facts you’d point at to establish a closer connection to Canada on Form 8840. One evidence file serves both.

There is one route by which the US side reaches back into the Canadian answer, and it’s the treaty. The CRA describes a deemed non-resident as someone who has established residential ties in a treaty country and is considered a resident of that country, while otherwise being a factual resident of Canada, and says the same rules apply to deemed non-residents as to non-residents. So if a tie-breaker were resolved in favour of the United States, the Canadian consequence isn’t cosmetic. That’s the direction you’d rather not travel, and the whole point of managing the day count is to keep the question from arising. Whether you’re still a Canadian tax resident works through the Canadian test properly.

What does getting this right actually cost?

Less than the alternatives, and the gap is what makes it worth pricing. A Form 8840 filed on its own each year is a small annual filing built on records you should be keeping anyway. The treaty route is a real US tax return: a Form 1040-NR prepared as a nonresident with a Form 8833 attached, which is more work and more exposure. And the year where nothing gets filed and the IRS treats you as a US resident is the expensive one, because a US resident reports worldwide income and picks up the account reporting alongside it.

• On the 8840 route: a day count nobody kept, so three years get reconstructed from stamps and statements.
• On the treaty route: property, accounts or a pension picture that has to be characterised before the return can be prepared.
• Worst of all: finding out after the fact, in a year already closed, with the choice narrowed to arguing reasonable cause.

Published ranges for cross-border work are on the pricing page. If what you want is a read on your own three years and a written answer on which route you’re in, that’s the $249 Cross-Border Assessment: a fixed-price, CPA-reviewed look at your day count, your ties, and the forms that follow from them, done before a deadline decides it for you.

What is the order of operations before next winter?

Six steps, and the first two happen before you book anything. Pull your actual US days for the last three calendar years and run the weighted math on them. Then decide whether the coming winter keeps the three-year total under 183, because that decision is cheap in October and expensive the following April. Everything after that is execution.

1. Pull three calendar years of US entry and exit dates from passports, border records or a calendar.
2. Run the weighted count: this year in full, first prior year at a third, second prior year at a sixth. The calculator does the arithmetic.
3. Take out any excluded days, and file Form 8843 if you’re excluding days as an exempt individual or on medical grounds.
4. If the total reaches 183, check the closer connection conditions: under 183 current-year days, a foreign tax home for the whole year, and a closer connection to that country.
5. File Form 8840 by the deadline, one per person, and keep the evidence behind Part IV with it.
6. If the exception is barred, price the treaty route before the year ends rather than after, because it means a Form 1040-NR with a Form 8833.

One habit is worth more than any of the six: put the 8840 deadline on the same list as your Canadian return. They’re two months apart and only one of them sends you a reminder.

If a green card, a US property purchase, or a longer stay is anywhere in the next few years, the day count stops being the only question. If you’re actually moving covers what the first US resident year looks like, and the departure side covers what Canada does when you leave for good.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.