How Long Can a Canadian Stay in the US? The 3 Limits to Watch

A Canadian citizen can stay in the United States for up to six months per stay without a visa, but that ceiling is an immigration limit, not an invitation: beyond roughly 182 days in twelve months, you risk a refusal of entry, U.S. taxation and the loss of your provincial health coverage. Three clocks run at the same time, and they are not calculated the same way. Here is how each one works, the rules added in 2025, and how to plan a long winter in the sun without an unpleasant surprise.

Clock 1: U.S. immigration, six months per entry

At the border, the U.S. customs officer admits a Canadian as a B-2 visitor for a period they set themselves, up to six months. It is a discretionary decision: they can grant two weeks to someone without a return ticket or with vague answers. By air, the deadline appears on your electronic Form I-94, which you can look up on the CBP website; by land, most Canadians do not receive one and the limit is implicitly six months. Nothing stops you from leaving and coming back, but the officer then looks at cumulative time. The common practice: if you spend more time in the United States than in Canada over a year, you are no longer a visitor, and entry can be refused.

An extension is theoretically possible by filing Form I-539 with USCIS before expiry, but it requires an I-94, costs several hundred dollars and is rarely granted to a visitor. The U.S. bill known as the Canadian Snowbird Visa Act, which would let Canadians aged 50 and over stay up to 240 days a year, has been before Congress since 2025 but had still not passed in 2026. Until it does, six months remains the rule. For a refresher on documents and the visa exemption itself, see do Canadians need a visa for the USA?.

The new 30-day rule

Since April 11, 2025, any foreign national who stays 30 days or more in the United States must be registered with the U.S. government, and the rule was made final in June 2026. Canadians who arrive by air are covered by their I-94. Canadians who arrive by road without an I-94, which means most snowbirds, must create a myUSCIS account and complete Form G-325R before day 30, then keep the proof of registration it generates. It is free and takes half an hour. The alternative is to request a paid I-94 at the border or through the CBP One app before arriving, which counts as registration. Failing to register is an offence that can carry a fine.

Clock 2: U.S. tax and the substantial presence test

The U.S. tax authority does not count the way immigration does. You are presumed to be a U.S. tax resident if you reach 183 days under the "substantial presence test", which spans three years: all the days of the current year, plus one third of the days of the previous year, plus one sixth of the days of the year before that. Someone who spends four months every winter in the United States crosses that threshold in the third year, without ever coming close to six months in a single stay.

The fix is simple, as long as you remember it: if you spent fewer than 183 days in the United States in the calendar year, you file Form 8840, the Closer Connection Exception Statement, by June 15 of the following year. It certifies that your home, your accounts, your doctor and your social life are in Canada, and exempts you from reporting your worldwide income in the United States. Beyond 183 days in a single year, Form 8840 is no longer enough: you have to invoke the Canada-U.S. tax treaty with a 1040-NR return and Form 8833, a step for which a cross-border accountant is worth it.

Clock 3: your provincial health coverage

Every province requires a minimum presence on its territory to keep public coverage. Most ask for about six months of presence in any twelve-month period, which limits absences to some 182 days. Ontario is a little more flexible, with 153 days of presence required, meaning up to 212 days away. Newfoundland and Labrador tolerates up to eight months. Quebec counts 183 days of presence per calendar year, with special rules for long stays declared in advance. These thresholds change, so check your plan's before leaving, and keep in mind that provincial coverage reimburses only a fraction of care received in the United States: travel insurance remains essential whatever the number of days.

What happens if you go over

• Immigration: beyond your admission date, you are unlawfully present. More than 180 days triggers a three-year entry ban, more than one year a ten-year ban. The visa exemption can be withdrawn: you would then have to apply for a visa at a consulate, with appointment waits of over a year in Canada in 2026.
• Tax: without Form 8840, the IRS can treat you as a tax resident and expect a return on your worldwide income, with penalties.
• Health: the province can cancel your coverage, and restoring it requires a new residency waiting period, sometimes three months.
• Permanent residence: a permanent resident of Canada must also meet 730 days of presence in Canada over five years, and a citizen-to-be waiting for the ceremony must stay reachable. Our articles on the PR card after citizenship and on the wait between the test and the ceremony cover this.

Planning a long stay: the method that keeps you out of trouble

• Keep a log of your entries and exits, with exact dates: it is the document the officer, the IRS and the province all ask for.
• Aim for fewer than 182 days per twelve months, all trips combined, and fewer than 183 days per calendar year.
• Register before day 30 if you entered by road without an I-94.
• File Form 8840 every spring if you spend more than four months a year in the United States.
• Check your province's threshold and buy travel insurance covering the whole stay.
• Keep proof of your ties to Canada: lease or property title, driver's licence, job, family.

What about working or moving there?

None of these rules allows you to work for a U.S. employer, even remotely from a condo in Florida. Work requires a dedicated status, such as TN status or an L-1 visa, described in our article on working in the United States as a Canadian. And if you are a permanent resident of Canada rather than a citizen, the length of your stay depends on your visa or ESTA, not on the Canadian exemption: our article on U.S. visas for permanent residents of Canada sets out the rules. Canadian citizenship itself is prepared with our guide on how to become a Canadian citizen and our practice exams.