Canadian Snowbird Six-Month Rule and U.S. Registration
The immigration six-month limit, the 30-day registration rule, the tax day count, and health coverage
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
Canadian snowbirds face three separate day limits: U.S. immigration (visitors generally admitted for up to six months), U.S. tax (the substantial presence test's weighted 183 days, managed with Form 8840), and provincial health coverage (five to six months a year at home). Since April 2025, Canadians 14 or older staying 30 days or more without an I-94 must register.
On this page
The three limits
| Limit | Rule (2026) |
|---|---|
| Immigration (visitor stay) | Generally up to six months per admission; overstaying affects future admissibility |
| Alien registration | Required since April 11, 2025 for Canadians 14 and older staying 30 days or more who weren't issued an I-94 (typically land entries) — air arrivals with an I-94 and those last admitted through NEXUS, FAST, or Global Entry already count as registered. Registration is online only, on Form G-325R through each person's own USCIS online account (parents register children under 14); Canadian visitors generally aren't called for fingerprints, registrants 18 and older must carry the proof, and the rule applies to each stay of 30 days or more |
| U.S. tax | Substantial presence test — 183 weighted days over three years; Form 8840 by June 15 to stay a nonresident (the Form 8840 guide) |
| Provincial health coverage | Varies by province — Ontario (OHIP): in Ontario at least 153 days in any 12-month period; Quebec (RAMQ): absent fewer than 183 days a calendar year (trips of 21 days or less don't count); British Columbia (MSP): vacation absences of up to seven months a calendar year |
Why they're different
Staying under six months satisfies immigration but can still meet the tax test after a few winters (the substantial presence guide). Health coverage often binds first — exceeding the provincial absence limit can cost OHIP or other coverage.
Record-keeping
Keep a day log for both countries (the domicile day log guide): CBP's travel history, your passport, and flight records.
Visa eligibility and status questions are for an immigration lawyer; this article covers the tax side.
Frequently asked questions
How long can a Canadian snowbird stay in the U.S.?
Generally up to six months per visit for immigration purposes — tax and health coverage rules may limit it further.
Do Canadian snowbirds need to register with U.S. immigration?
Those 14 or older staying 30 days or more who weren't issued an I-94 (common at land crossings) must register online with USCIS on Form G-325R — the rule applies to each stay of 30 days or more.
Is the six-month rule the same as the tax rule?
No — tax uses the substantial presence test's weighted day count.
What file keeps me a tax nonresident?
Form 8840, filed every year by June 15 once you meet the substantial presence test.
Official sources
U.S. Customs and Border Protection explains: “Canadian citizens traveling to the United States by land or sea are required to present one of the travel documents listed below, and may generally visit the United States for up to six months.” — U.S. Customs and Border Protection, Visiting the U.S. - Documents required for Canadian Citizens / Residents / Landed Immigrant to enter the U.S. and how long they can stay, https://www.help.cbp.gov/s/article/Article-1418?language=en_US
U.S. Citizenship and Immigration Services explains: “The INA requires that, with limited exceptions, all aliens 14 years of age or older who were not registered and fingerprinted (if required) when applying for a U.S. visa and who remain in the United States for 30 days or longer, must apply for registration and fingerprinting.” — U.S. Citizenship and Immigration Services, Alien Registration Requirement, https://www.uscis.gov/alienregistration
The IRS explains: “You will be considered a United States resident for tax purposes if you meet the substantial presence test for the calendar year.” — Internal Revenue Service, Substantial presence test, https://www.irs.gov/individuals/international-taxpayers/substantial-presence-test
Next step
Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk and Canadian Tax Desk handle snowbird day counts for the substantial presence test and provincial health coverage, and annual Form 8840 filings. See pricing or book a call.
Cross-border taxes, handled in one place
U.S. and Canadian filings prepared together by our U.S. and Canadian Tax Desks.
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