Two Chiropractors, Two Home Offices, and a Foreign Tax Exposure

The situation

Genevieve called our office on a Tuesday afternoon asking for twenty minutes, and the twenty minutes turned into an hour. She owned a small Burlington corporation through which she and her colleague Niloufar, both chiropractors, provided remote consulting and case-review services to a chiropractic clinic group based in the United States. The arrangement had started three years earlier as something informal and part-time, and had since grown into a significant piece of both their practices, with Genevieve and Niloufar each working from home offices most weekdays, reviewing patient files and running video consultations for the US group's clinicians.

What prompted the call was a conversation Genevieve had with Mehrdad, the US group's finance contact, who had mentioned almost in passing that their accountant was asking questions about how much of the group's clinical decision-making was actually happening in Ontario rather than in the United States. Mehrdad had not sounded alarmed, but Genevieve was, because she had never thought of her home office as anything more than a convenient place to work. She had not considered that the volume and nature of what she and Niloufar were doing from Burlington could matter to the US group's own tax position.

The concern, once we unpacked it, was about permanent establishment. Under the tax treaty framework that governs cross-border business activity between Canada and the United States, a foreign company can become taxable in Canada if enough of its business is being carried on here through a fixed place of business, even one it does not own or lease directly. A home office used regularly and substantively for a foreign employer's core work can, in the wrong pattern, start to look like exactly that kind of fixed place of business, and the dollar exposure at stake for the US group, if that view held, sat somewhere in the range of a few hundred thousand dollars once the income attributable to the Ontario activity was estimated.

Genevieve's instinct was that this was mostly a formality, something a cautious accountant was flagging out of an abundance of caution, and she said as much on the call, half expecting us to agree and tell her not to worry. We were not so sure, and we told her that before we could say anything useful, we needed to see what she and Niloufar had actually been doing from those home offices over the past several years, not what she remembered doing or what felt true from the outside of a busy practice.

What made this urgent

Genevieve's account of the work, in that first meeting, was that she and Niloufar mostly reviewed files and occasionally jumped on a call, with the substantive clinical judgment happening on the US side. That description, if accurate, would have made the permanent establishment concern much smaller, since routine administrative support generally carries less weight than a fixed base for anything the treaty would treat as the foreign company's core business activity.

Her calendar and time-tracking software told a different story. When we asked Niloufar's practice manager for the scheduling records the two chiropractors used to log their consulting hours, the pattern was far more extensive than either of them had described. Genevieve and Niloufar were not occasionally reviewing files. They were running structured case consultations most weekdays, often for four or five hours at a stretch, using the home offices as a fixed and recurring base for work that the US group's own clinicians treated as a core input into patient care decisions made on the American side.

That gap between what Genevieve remembered and what the records showed was what made the file urgent rather than routine. A permanent establishment analysis depends heavily on the actual facts of how a fixed place of business is used, not on how the people using it would describe it from memory months or years later. If Mehrdad's accountant pulled the same scheduling records we had, the volume and regularity of the work would support a much stronger permanent establishment argument than Genevieve's own account suggested, and that argument would run against the US group, not against Genevieve's Canadian corporation directly, though the fallout for her ongoing relationship with the group would have been serious either way.

There was also a timing pressure that Genevieve had not fully registered when she first called. The US group's fiscal year end was approaching, and their accountant wanted a position before year-end filings were prepared, which meant the window for shaping how the facts were presented was measured in weeks, not months. Waiting for a formal inquiry to force the issue would have meant reacting to someone else's timeline and someone else's framing of the facts, rather than getting ahead of the analysis while there was still room to change how the work was structured going forward and to influence how the historical pattern was characterized before anyone else had written it down first.

What we did

1. Pulled the actual scheduling and time records instead of relying on recollection. We asked for twelve months of calendar entries, video call logs, and time-tracking exports from both Genevieve's and Niloufar's home office work, because a permanent establishment analysis has to be built on documented patterns of activity, and their initial verbal description had already proven to understate how the arrangement actually functioned.
2. Mapped the work against the treaty's fixed place of business framework. We assessed how regularly the home offices were used, how central the work was to the US group's clinical operations, and whether the activity amounted to more than preparatory or auxiliary support, since that distinction largely determines whether a home office crosses into permanent establishment territory under the treaty.
3. Identified which specific activities created the greatest exposure. Structured case consultations that directly informed US patient care decisions carried far more weight than administrative file review, so we separated the two categories and quantified roughly how much of Genevieve's and Niloufar's time fell into each, giving the US group's accountant something concrete to work with rather than a vague description.
4. Recommended restructuring the consulting arrangement going forward. We proposed shifting the highest-risk consultations to be initiated and directed from the US side, with Genevieve and Niloufar providing input on request rather than running the sessions as a recurring fixture from their Burlington offices, which reduced the fixed-and-regular character that had driven the exposure in the first place.
5. Coordinated directly with the US group's accountant through Mehrdad. We shared our factual mapping and proposed restructuring with Mehrdad so the US side's advisor could confirm it addressed their concerns, since a unilateral fix on the Canadian side would have been of limited value if it did not also satisfy the analysis already underway in the United States.
6. Documented the corrected structure in a written agreement. We helped Genevieve's corporation put in place a services agreement with the US group that reflected the new pattern of work, so that going forward there would be a clear paper trail showing the home offices were not being used as a fixed base for the group's core clinical decision-making.
7. Addressed the prior period directly rather than letting it sit unresolved. Because the old pattern had already existed for three years, we worked with Mehrdad's accountant to document why the historical activity, while significant, fell short of what would trigger a formal permanent establishment finding, closing out the retrospective question rather than leaving it sitting as an open liability the US group's own auditors might revisit at a later, less convenient moment.
8. Set up an ongoing review to keep the pattern from drifting back. We recommended a quarterly check of the same scheduling records, so that Genevieve and Niloufar, or whoever managed the arrangement after them, would notice if the volume or nature of the consulting work started sliding back toward the fixed and regular pattern that had created the risk in the first place.

The outcome

The US group's accountant accepted the restructured arrangement and the supporting documentation, and no permanent establishment position was asserted for the prior period or going forward. That was a clear win for Genevieve, both because her corporation's relationship with the US group continued without disruption and because the exposure, which had it materialized would have run into the low hundreds of thousands of dollars for the US side, never crystallized into an actual assessment.

The restructured consulting model changed how Genevieve and Niloufar worked day to day, with the US clinicians now initiating most consultations rather than the two chiropractors running a standing weekly schedule from Burlington. It was a real change in practice, not just paperwork, and it took a few months to settle into a new rhythm. Genevieve later said the adjustment was smaller than she had feared once it was actually in place.

What stayed with Genevieve afterward was how far her own sense of the arrangement had drifted from what the records actually showed. She had genuinely believed the work was lighter and more occasional than it was, and it took an outside review of her own calendar to reveal the pattern that had created the risk in the first place. She now keeps a clearer log of which consultations she initiates versus which come from the US side, precisely so that distinction stays visible rather than blurring again over time the way it had before Mehrdad's offhand comment on the phone.

Niloufar took the same lesson into how she structures her own share of the work, and the practice manager who had originally produced the scheduling records now runs the quarterly check we recommended as a standing item rather than a one-time favour. None of that would have happened if the first conversation had stopped at Genevieve's own recollection of a schedule that, in practice, looked nothing like what she remembered.

What you can learn from this