How many days can Canadian snowbirds spend in the U.S.?

Who this is for: Canadian citizens who live in Canada and are Canadian residents for tax purposes. If you are a US citizen or hold a US green card, different rules apply, and this guide does not cover your situation.

Since 2009, snowbirds have asked me about exchange rates, and almost as often they have asked me about days. The two questions travel together, because the people moving money south for the winter are the same people counting how long they can stay.

The trouble is that there is not one limit. US immigration permission and US tax residency follow different rules, and your provincial health plan has a third. Each counts days differently. This post walks through all three, with the IRS test in the most detail.

I run a currency exchange company. I am not a tax professional or an immigration lawyer. Every rule here comes from the official source named beside it, and before you plan your dates, confirm your position with a qualified cross-border accountant.

How many days can a snowbird stay in the US?

It depends on which rule you are asking about. Entry to the US, US tax residency, and your provincial health coverage each set their own limits, and you have to stay inside all three.

The IRS row is the one that surprises people. You can be well inside the border limit and your provincial limit and still meet the US tax test, because it adds three calendar years together.

How does the IRS count the 183 days?

Many snowbirds believe that staying under 183 days in one calendar year keeps them safe. That is a common misunderstanding. The IRS uses a three-year formula called the Substantial Presence Test.

You meet the test if both of these are true:

1. You were in the US at least 31 days in the current calendar year, and
2. Your weighted total over three calendar years is 183 days or more.

The weighting works like this:

• This year: every day counts in full.
• Last year: each day counts as one third.
• Two years ago: each day counts as one sixth.

If the total is under 183, you do not meet the test. If it is 183 or more, the IRS treats you as a US resident for tax purposes unless you qualify for an exception. IRS Publication 519 says resident aliens are generally taxed on their worldwide income.

The IRS generally counts any day you are in the US, even if you are only there for part of the day. Both the day you arrive and the day you leave count. If you cross at 11:30 on a Monday night and drive home at 12:30 on Tuesday morning, you have used two days for one hour of shopping.

There are some exclusions. According to Form 8840, you do not count days you regularly commuted to work in the US from a home in Canada, days you were in the US for less than 24 hours while travelling between two places outside the US, and days you could not leave because of a medical condition that arose while you were there.

Why can I be caught if I never spend 183 days in one year?

Because the formula adds three calendar years together. Take a couple who spent exactly 122 days in Florida in each of 2024, 2025, and 2026.

At 122 days a year, the third year lands exactly on 183. They meet the test without ever coming close to 183 days in a single year.

You will often hear that 121 days is safe. It is a planning shorthand, not a legal limit. It only works if each of the three calendar years has 121 counted days or fewer, which gives a total of 181.5. If either of the two earlier years was higher, 121 days this year may not keep you under. It also says nothing about any other US tax filing you may have.

Short trips count too. Someone who winters for 100 days but makes 25 quick trips across the line to shop has used 125 days, because each trip is a full day. Do that three years running, and the weighted total is about 187.

Does one winter count as one year or two?

Two. The IRS counts calendar years, and a winter in Florida or Arizona usually crosses January 1.

Say you leave on November 1 and come home on March 31. That is 61 days at the end of one calendar year and 90 days at the start of the next, or 91 in a leap year. If you do that every winter, each calendar year holds about 151 days: January to March from one winter, and November to December from the next.

At about 151 days a year, three years running, the weighted total is about 226. A “five-month winter” is well over the line, even though no single trip comes close to 183 days.

How do I work out my own day budget?

Use your real numbers from the last two calendar years. To stay under 183 in 2026:

Your 2026 days must be fewer than 183, minus one third of your 2025 days, minus one sixth of your 2024 days.

For example, if you spent 140 days in the US in 2025 and 120 days in 2024, that is 183 minus 46.7 minus 20, which leaves 116.3. You would need to keep 2026 to 116 days or fewer. At 117 days, the total would be 183.7, and you would meet the test.

If the result is below 31, you can still spend up to 30 days in the US this year without meeting the test, because the test needs at least 31 days in the current year. Count from your travel log, not from memory.

What is Form 8840 and when is it due?

If you meet the Substantial Presence Test, you may still be treated as a non-resident by claiming the Closer Connection Exception on Form 8840, the Closer Connection Exception Statement for Aliens. According to the IRS, all of these must be true:

1. You were in the US fewer than 183 days in the current calendar year.
2. You kept a tax home in Canada for the whole year.
3. You had a closer connection to Canada than to the US.
4. You have not applied for, or taken steps toward, a US green card.

Filing the form does not make you eligible on its own. The form asks where your permanent home is, where your family lives, where your car and belongings are, where you bank, where your driver’s licence was issued, where you are registered to vote, and whether you have a national health plan. The IRS considers all these facts together, so your answers support your claim rather than decide it.

For a snowbird with no US wages, the deadline is the 15th day of the 6th month after the tax year ends, according to IRS Publication 519. For a calendar year, that is June 15. Days spent in the US in 2026 would go on a form due by June 15, 2027, if the rule does not change. The form asks for a US taxpayer identification number only if you have one. The Form 8840 posted on November 3, 2026, is the 2025 edition, so check the current version before you file.

A qualified cross-border accountant can confirm whether you qualify and complete the form correctly.

What happens if I stay too long?

If you meet the Substantial Presence Test and do not file Form 8840 on time, you cannot claim the closer connection exception for that year, unless you can show the IRS clear and convincing evidence that you took reasonable steps to learn about and meet the requirement. The IRS can then treat you as a US resident and tax your worldwide income.

Canada and the US exchange entry records for travellers who cross at land borders, according to the Canada Border Services Agency, so your day count is not private.

If you were in the US 183 days or more in one calendar year, Form 8840 is not available. You may still qualify as a non-resident under the Canada-US tax treaty. That route means filing a US tax return, Form 1040-NR, with Form 8833 attached, and it is far more work than filing Form 8840 on time.

Staying past the date on your US admission record is a separate immigration matter, not a tax one.

If you think you are over, speak to a qualified cross-border accountant, and to an immigration lawyer about any overstay, before the next deadline.

How long can I stay in the US as a Canadian visitor?

Canadian citizens can generally visit the US for up to six months, according to US Customs and Border Protection.

That is permission to be in the country, not a tax allowance. Six months is more than enough to meet the IRS test, so a long stay that is fine at the border can still make you a US resident for tax purposes.

How many days can I be out of my province before I lose health coverage?

Each province sets its own rules, and the limits differ. In Ontario, if you are outside the province for more than 212 days in any 12-month period, you may have to reapply for OHIP, according to ontario.ca. In Quebec, RAMQ says you must not be absent 183 days or more per calendar year, that certain exceptions apply, and that you should notify RAMQ before any travel that goes beyond the rules for your situation. Other provinces have their own limits.

Call your provincial health ministry before you leave, and ask your travel insurer whether your policy depends on keeping your provincial coverage. Get both answers in writing if you can.

Our older guide on how long you can stay outside Canada without losing benefits covers travel to other countries.

The border lets you in for six months. The IRS is counting three calendar years. Those are two different rules, and the tax one is the one that catches people.

Rahim Madhavji, President, Knightsbridge Foreign Exchange Inc.

What should I do before I leave this winter?

1. Keep a travel log. Record every day you enter and leave the US, including shopping trips. Border records and credit card statements are your backup.
2. Work out your day budget for this year from your real numbers for the last two calendar years, using the formula above.
3. If you will be in the US 31 days or more this year and your weighted total reaches 183, check with an accountant that you qualify for the closer connection exception, and plan to file Form 8840 by June 15.
4. Confirm your provincial health limit and your travel insurance coverage in writing.
5. Set up how you will pay for the winter. If you will pay US bills, a US bank account and a plan for buying US dollars before you leave will save you from converting at the card rate all season.

Knightsbridge Foreign Exchange Inc. is registered with FINTRAC as a money services business (registration M09819788), licensed as a money services business by Revenu Québec (licence 12115), and registered with the Bank of Canada under the Retail Payment Activities Act.

Read next: Snowbirds currency exchange · How long can you stay outside Canada without losing benefits · When is the best time to buy US dollars

This article is general information for Canadian citizens who are Canadian residents for tax purposes. It is not tax, legal or financial advice. It describes IRS, US Customs and Border Protection, Ontario and RAMQ rules as published on November 3, 2026. Confirm current rules with those sources, and your own position with a qualified cross-border accountant.