Canada Tax Residency (183-day rule)

Key parameters
Threshold	183 days
Period / Window	Calendar year (1 Jan – 31 Dec)
Counting	Any part of a day
Alternative	Residential ties test

You are a Canadian tax resident for a calendar year if you meet either of two tests:

• Factual residency (ties) — you maintain significant residential ties to Canada, most importantly a home available to you, a spouse or common-law partner in Canada, or dependants in Canada. A collection of secondary ties — financial accounts, memberships, a driver's license, provincial health coverage — can reinforce a borderline case, though a single one rarely decides it alone.
• Deemed residency — if you don't have significant residential ties, you're still deemed resident if you sojourn (are temporarily present) in Canada for 183 days or more in the calendar year.

Deemed residency is a backstop: it only comes into play once factual residency doesn't already make you resident. Meeting either test makes you a Canadian tax resident, taxed on worldwide income. Falling short of both makes you a nonresident, taxed only on Canadian-source income.

• A tax treaty can override deemed or factual residency. Under a specific statutory provision, even someone who meets Canada's domestic tests can be treated as a non-resident for Canadian tax purposes if a treaty's tie-breaker rules assign residence to the other country instead.
• Arrivals and departures can split the tax year. Residency can start or end partway through the year rather than applying to all 12 months, based on when significant ties were established or given up.

Getting your residency status wrong and misreporting income risks a gross negligence penalty of 50% of the extra tax owing, on top of the tax and interest itself. Professional tax advice is strongly recommended in situations like this.

Ties keep you resident despite few days in the country

You accept a two-year overseas work contract but keep your family home in Toronto available, and your spouse and children stay there while you're away. You spend almost no days in Canada that year, but your residential ties mean you remain a factual resident throughout.

The 183-day backstop catches someone with no ties

You have no home, spouse, or dependants in Canada, but you spend 200 days there this year on a series of short-term contracts. With no residential ties, the deemed-residency test applies at 183 sojourned days or more, making you a resident for the entire year.

A tax treaty flips the outcome

You move to Canada for a new job and establish a home there, making you a factual resident under domestic law. Your family stays behind in a home that remains available to you, and under the tax treaty's tie-breaker rules, your permanent home is found to be in your previous country instead — so despite qualifying under Canada's own test, you're deemed a non-resident for Canadian tax purposes.

• Canada Revenue Agency — Income Tax Folio S5-F1-C1: Determining an Individual's Residence Status
• Canada Revenue Agency — Deemed residents of Canada