No Visa, Still Taxed? Canadians Doing U.S. Business Trips and Remote Work From the U.S.

Every other guide in this series is about Canadians who moved. This one is about the much larger group who didn't — and who assume that settles it.

The sales director in Toronto who's in the U.S. three days most weeks. The consultant flying to client sites in Chicago and Dallas. The remote employee of a Canadian company who's discovered they can work from a rented condo in Fort Lauderdale for three months every winter. No U.S. job, no U.S. employer, often no visa beyond visitor status. And, frequently, a U.S. tax exposure quietly accumulating — because U.S. tax law doesn't care whether you moved. It cares where you were and where the work happened.

The day count doesn't know it was a business trip

The Substantial Presence Test counts days of physical presence — vacation, business, or a mix. Its weighted three-year formula (explained with examples here) means a steady pattern of roughly 120+ days a year can make you a U.S. tax resident without a single relocation box being packed. Frequent business travelers hit this more often than snowbirds, because their trips are invisible to them — no one mentally tallies 45 two-day trips.

31 days during the current year, and 183 days during the 3-year period that includes the current year and the 2 years immediately before that

Cross the line and the consequences are total: U.S. tax jurisdiction over worldwide income and the FBAR stack over your Canadian accounts (the guide). The defenses exist — the closer connection exception (Form 8840, the snowbird's tool, works for travelers too) and the treaty tie-breaker — but both are claimed, on time, with a day log to back them. Which makes the day log itself the cheapest tax insurance a frequent traveler can own.

Work performed on U.S. soil is U.S.-source — even for a Canadian paycheque

Here's the rule that breaks the remote-work dream: employment income is sourced where the work is physically performed, not where the employer or the payroll sits. Answer emails from that Florida condo for eight weeks and, technically, those weeks of your Canadian salary are U.S.-source income.

compensation for labor or personal services performed in the United States

The treaty provides the relief that keeps short stints practical: broadly, a Canadian resident's U.S.-performed employment income stays out of U.S. tax if it's under about $10,000 USD, or if you were present under 183 days in any 12-month period and the cost isn't borne by a U.S. employer or U.S. permanent establishment. Most modest winter-work arrangements fit inside that shelter. But it has edges: high earners on long stints, anyone whose pay gets charged to a U.S. entity, and self-employed consultants (whose test runs on "fixed base"/permanent-establishment concepts instead) can all fall outside it — at which point a U.S. filing obligation is real, even with a Canadian employer and a Canadian bank account.

present in that other State for a period or periods not exceeding in the aggregate 183 days in any twelve-month period commencing or ending in the fiscal year concerned

Your laptop can create problems for your employer, too

The exposure runs both directions. An employee regularly working from U.S. soil — especially one with authority to negotiate or conclude contracts — can create a permanent establishment or state-level "nexus" for the Canadian employer: a corporate U.S. tax foothold, payroll-registration questions, state filing duties. This is why Canadian employers increasingly cap or track U.S. remote-work days. If yours hasn't thought about it, your winter arrangement may be a bigger conversation than a Slack status change.

And a word of caution on the immigration side: visitor status permits meetings, conferences, and business incidental to your Canadian job — not U.S. employment. Extended "work from the U.S." patterns live in a gray zone where tax is only one of the risks. Get both questions answered, not just this one.

The pattern to manage

Nobody in this article did anything wrong. They just repeated a harmless-looking pattern until it crossed one of three lines: the residency day count, the treaty's income shelter, or the employer's PE exposure. All three lines are visible in advance — to anyone who's counting.

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Related reading: - The Substantial Presence Test Explained - Form 8840 for Snowbirds — The Closer Connection Exception - U.S. Taxes for Canadians, by Visa Type: The Complete Guide Hub