Short answer: Moving to Miami for the winter exposes Canadian snowbirds to a weighted 3-year IRS day count, not a simple 183-day limit: all your US days this year + 1/3 of last year’s + 1/6 of the year before. Reach 183 or more (with at least 31 days this year) and the IRS treats you as a US tax resident — on your worldwide income — unless you file Form 8840 by June 15 proving a closer connection to Canada. The trap: just 122 days a year (about 4 months) in Florida, every year, trips the line at exactly 183. The literal question behind this guide — “The snowbird tax trap: how many days Canadians can actually stay in Florida” — has a precise answer: fewer days than most people think.
Updated: October 9, 2026.
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Moving to Miami: how the IRS counts your winter days
The rule most Canadians have heard — “stay under 183 days and you’re fine” — is the trap itself. The IRS substantial presence test uses a weighted formula across three calendar years:
- All the days you were present in the US during the current year, plus
- 1/3 of the days you were present in the previous year, plus
- 1/6 of the days you were present in the year before that.
Two conditions must both be met: you were in the US at least 31 days this year, and the weighted total reaches 183. Any part of a day in the US counts as a full day — arrival and departure days both count.
| Your pattern (US days per year) | Weighted total | Meets the test? |
|---|---|---|
| 150 days every year (~5 months) | 225 | Yes — test met |
| 152 days every year (~5 months) | 228 | Yes — test met |
| 122 days every year (~4 months) | 183 | Yes — right on the line |
| 120 days every year (~4 months) | 180 | No — 3 days short |
| 150 this year, 90 the two years before | 195 | Yes — test met |
| 182 days every year (~6 months) | 273 | Yes — and over the 8840 ceiling |
Notice what the table shows: you can meet the test without ever spending six months in the US in one year. Five months a year in Florida, every year, is 225 — comfortably over the line.
Form 8840: the filing that protects your closer connection to Canada
Meet the test and the IRS presumes you’re a US tax resident. The escape route is the closer connection exception, claimed on Form 8840 (Closer Connection Exception Statement for Aliens). Every one of these conditions must hold for the year:
- You were physically present in the US for fewer than 183 actual days (the raw, un-weighted count).
- You had your tax home in Canada for the entire year.
- You had a closer connection to Canada than to the US — permanent home, family, driver’s licence, bank accounts, voting jurisdiction, business and social ties.
- You did not apply for, or take steps toward, US permanent resident status (green card) during the year.
The deadline is June 15 of the following year if you file no other US return; if you file a Form 1040-NR, attach the 8840 to it. The form itself is free to file, but it travels by regular mail (courier or registered mail is not advisable — no one signs at the IRS address): Department of the Treasury, Internal Revenue Service Center, Austin, TX 73301-0215. The IRS must receive it by the deadline, so from Canada allow at least 14 working days of mail time. Keep a copy and proof of mailing. Miss the filing and you generally lose the exception — the only standard is “clear and convincing evidence” that you tried to comply, which is a very high bar.
What most people don’t know
Four months a year, every year, is exactly 183. The 122-day row in the table above is the classic snowbird pattern (January through April), and it lands precisely on the line. One extra weekend trip to Florida that year — a wedding, a cruise departure — pushes you over.
At 183 raw days, Form 8840 disappears. The closer connection exception is unavailable once your actual current-year presence reaches 183 days. The only remaining route is the Canada–US tax treaty tie-breaker, claimed on a 1040-NR with Form 8833 — more involved, with US information-reporting consequences.
Land crossings now carry a registration duty. Since April 11, 2025, Canadians aged 14+ staying 30 days or more who entered the US by land without being issued an I-94 must register with USCIS (Form G-325R, free). Air travelers are already covered by their electronic I-94, and since June 29, 2026, travelers last admitted through NEXUS count as registered. Willful failure to register can bring fines up to $5,000 or up to six months’ imprisonment. This is an immigration filing, not a tax one — but winter snowbirds who drive down to Florida are squarely in its scope.
Your provincial health coverage has its own day count. In Ontario, OHIP requires you to be physically present in Ontario at least 153 days in any 12-month period — so you can be away up to 212 days and keep coverage. Other provinces set their own limits, and once you actually move permanently, provincial coverage ends. Plan the US day count and the provincial day count together, not separately.
A medical emergency doesn’t have to wreck your count. Days you intended to leave the US but were prevented by a medical condition that arose while you were here are excluded from the test — claimed on Form 8843. It doesn’t cover pre-existing conditions, and it needs documentation.
Frequently asked questions
Does the 183-day rule affect Florida state taxes? No — Florida has no state income tax, so there is nothing to gain or lose at the state level. The entire trap is federal: IRS residency on your worldwide income. That’s also why “becoming a Florida resident” is not the issue — the IRS doesn’t care about your Florida driver’s licence; it cares about your days.
How long can a Canadian stay in Florida without a visa? Canadian visitors are typically admitted for up to six months per visit in B-2 visitor status, at the border officer’s discretion — but immigration admission and tax residency are two different clocks. Six months of lawful stay is 273 weighted days: squarely inside the trap.
What happens if I forget to file Form 8840? You generally lose the closer connection exception for that year. The fallback is the treaty tie-breaker (Form 8833 with a 1040-NR), which is more complex and can trigger US information-reporting obligations. This is exactly the moment to involve a cross-border accountant.
Can I just stay 150 days a year and skip the paperwork? No. At 150 days a year you meet the substantial presence test (225 weighted) and must file Form 8840 every year to stay a nonresident. Skipping it doesn’t skip the test — it skips your only easy defence.
This guide is general information, not tax advice. Cross-border tax is fact-specific — confirm your day count and filings with a cross-border tax professional.
Yara Coker — SETTLE, relocation services in Miami.
Want help with your move to Miami?
Moving to Miami for the winter as a Canadian? SETTLE reviews your day-count strategy before you book, verifies the building’s rental rules for seasonal stays, and coordinates the housing side — lease terms, furnished options, move-in timeline — so your winter in Florida starts organized, not improvised. Tell us your dates and your budget:
Versión en español: Vivir en Miami: la trampa fiscal del snowbird — cuántos días pueden quedarse realmente los canadienses en Florida
### Sources
- IRS, Form 8840 and closer connection exception rules: https://www.irs.gov/Form8840
- IRS substantial presence test, day-count formula (31 days + 183 weighted): https://www.irs.gov/individuals/international-taxpayers/substantial-presence-test
- Taxes for Expats, IRS Form 8840 closer connection exception guide (2026): https://www.taxesforexpats.com/articles/non-us-citizens/irs-form-8840-closer-connection-exception-to-avoid-us-taxation.html
- Mondaq, IRS tax reporting for Canadians — which US forms you need and when (Oct 2026): https://www.mondaq.com/canada/income-tax/1849998/irs-tax-reporting-for-canadians-which-us-forms-you-need-and-when
- Snowbird Advisor, how Canadians submit Form 8840 (deadline June 15, Austin TX mailing, regular mail only): https://www.snowbirdadvisor.ca/snowbird-faqs/how-can-canadians-submit-form-8840-irs
- U.S. Embassy & Consulates in Canada, Alien Registration Requirement (land entry without I-94): https://ca.usembassy.gov/alien-registration-requirement/
- Canadian Snowbird Association, NEXUS registration update (Aug 2026): https://www.snowbirds.org/news-releases/important-update-u-s-registration-requirements-for-nexus-members/
- CIC News, Ontario OHIP eligibility — 153 days physical presence in any 12-month period: https://www.cicnews.com/2025/10/how-to-navigate-the-ontario-healthcare-system-1061199.html
