The Complete Canadian Snowbird Season Planning Checklist

Ontario's OHIP requires you to be physically present in Ontario for at least 153 days per calendar year (approximately 5 months) to maintain eligibility. The calendar year runs January 1 to December 31 — not a rolling 12-month period. If you leave Ontario on November 1 and return April 15, you've been away approximately 165 days, spanning two calendar years: about 61 days from November 1 to December 31, and about 105 days from January 1 to April 15. In each of those calendar years, you've maintained well over 153 days in Ontario — so OHIP coverage is preserved. The risk arises when snowbirds extend their stay. If you stay until May 15 instead of April 15, that's an extra 30 days — now you've been away 135 days from January 1 to May 15, leaving only 230 days in Ontario for that calendar year. Still within the 153-day threshold but tightening. If you also take a summer trip abroad, the days accumulate. Keep a simple spreadsheet tracking your out-of-province days by calendar year. OHIP also requires that you maintain your principal residence in Ontario — not just visit occasionally.

Most standard Canadian homeowners insurance policies have a vacancy clause that requires the insurer to be notified when the property will be unoccupied for more than 30 consecutive days. If you don't notify them and a loss occurs during the vacancy period, your claim may be denied — even for a loss like a pipe burst that has nothing to do with the absence. The policy wording varies by insurer, but the 30-day threshold is typical. When you notify your insurer, they will typically: (1) Confirm the policy continues with the vacant property clause in force; (2) Require specific winterization (minimum temperature maintained, water shut off, etc.); (3) Require regular inspections by a named third party (typically every 7–14 days depending on the insurer); (4) May charge an additional premium for a vacancy endorsement. Some insurers will cancel the policy entirely for extended vacancies and offer a vacancy-specific policy instead. Do not leave without having this conversation — a winter property loss without valid insurance because you failed to notify your insurer is a catastrophic financial outcome that takes minutes to avoid.

The US Substantial Presence Test determines whether Canada-resident snowbirds who spend time in the US are treated as US tax residents for US federal income tax purposes. The formula is: (days in US this year) + (1/3 × days in US last year) + (1/6 × days in US two years ago). If this total equals 183 or more, you may be considered a US tax resident regardless of your Canadian residency. Example: 120 days in the US this year + (1/3 × 120 = 40 from last year) + (1/6 × 120 = 20 from two years ago) = 180 — below the threshold. At 130 days this year: 130 + 43 + 21 = 194 — over the threshold. However, Canadians who trigger the substantial presence test can file Form 8840 (Closer Connection Exception) with the IRS to establish that their closer connection is to Canada — this exempts them from US tax residency if they have a tax home in Canada, fewer than 183 days in the US in the current year, and demonstrable closer connections to Canada (CRA filing, Canadian driving licence, Canadian social ties). File Form 8840 by June 15 of the year following the calendar year in question. This does not apply to Canadians in Mexico, the Caribbean, or other non-US destinations.

Historically, the best window for booking November departure flights to Mexico (Cancún, Puerto Vallarta, Los Cabos, Puerto Vallarta) and Caribbean destinations (Dominican Republic, Cuba, Jamaica) is August — approximately 3 months before departure. The snowbird booking surge typically begins in September, when snowbirds returning from summer trips start planning their winter season and booking en masse. This surge drives up prices on popular nonstop routes from Vancouver, Calgary, Toronto, and Montreal. Flight prices are typically 15–25% higher for the same routes when booked in October versus August. Specifically: Air Canada and WestJet release seat inventory for the following winter season (November–April) in late spring or early summer — the initial pricing on these seats can be excellent, and they often fill quickly. Set fare alerts on Google Flights for your target routes in May–June, and book when prices hit your target threshold rather than waiting for an even lower price that may not come. Direct snowbird routes are capacity-constrained — the best seats go earliest.

Planning medications for 5 months requires working 6–8 weeks in advance of departure. First, see your doctor to discuss your complete medication list for the duration and ensure prescriptions are current. In most Canadian provinces, pharmacies can dispense up to a 90-day supply of most medications — in some provinces and for some medications, larger supplies are possible with medical authorization. For a 5-month (150-day) stay, you'll need to arrange at least two fills: one at 90 days before departure and another close to departure. Many Canadian snowbirds also research pharmacies in their Mexican destination city in advance. Many common medications (cholesterol drugs, blood pressure medications, metformin, some antibiotics) are available over the counter in Mexican pharmacies at very low cost without a prescription — but this doesn't apply to controlled substances. Controlled substances (opioids, benzodiazepines, ADHD medications) have strict importation rules: Mexico limits visitors to a personal-use supply of up to 2 months, only with a valid prescription, and the medication must be in the original packaging with a prescription label. Never carry controlled substances in unlabelled containers. Carry a medication list translated into Spanish, including generic names (brand names differ by country).

Yes — but the update you make depends on your preference. If you maintain a Canadian mailing address (the home you're leaving, or a trusted person's address) and have someone managing your mail, you can leave your CRA address as your Canadian home address and rely on that person to forward any urgent CRA correspondence. This is the simpler approach. Alternatively, if you have a stable foreign address for the winter season, you can update your CRA address to that address — CRA will send correspondence there. The risk: CRA's response deadlines are absolute. If an audit request arrives at a Mexican address and takes 2 weeks to get to you, you've lost 2 of the 30 days typically allotted to respond. For this reason, most tax advisors recommend keeping a Canadian mailing address active and having someone monitor it during your absence, rather than relying on foreign mail delivery for time-sensitive government correspondence. Service Canada (OAS, CPP, Employment Insurance) is a separate database from CRA — update both independently through their respective online portals.