TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
№ 223 Case Study — Tax

A construction manager's winter routine put her health coverage at risk

Shalini had spent decades splitting her year between Mississauga and a Florida condo without a second thought. A letter from the province made her realize the arithmetic mattered more than she knew.

Tax9 min readMississauga, OntarioSnowbird tax status
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ClientShalini, a construction project manager who winters in Florida with her spouse
The issueYears of undocumented time abroad put her Ontario residency and tax status in question
ServiceReconstructed a defensible travel record and residency position, then negotiated with the reviewing authority
ResolutionOntario health coverage was confirmed intact, and the disputed stock compensation was reported on a defensible, well-documented residency position, with a travel protocol in place going forward

The situation

The letter arrived on a Tuesday in February, while Shalini was in Florida with her spouse Meera, a university professor on sabbatical leave. It was from the provincial health authority, and it asked a question Shalini had never been asked before: how many days had she spent outside Ontario in each of the last three years. She did not know the answer, and that was the moment she understood something might be wrong. She read it standing at the condo's kitchen counter, coffee going cold, and called Meera in from the balcony to read it again with her.

Shalini had worked as a construction project manager for the better part of two decades, and along the way she had picked up a block of foreign stock compensation from a US-based contractor she had worked for early in her career, options that had vested slowly and were now worth a meaningful sum. She and Meera had also settled into a pattern familiar to a lot of people who can arrange their work around the calendar: leave for Florida in November, come back sometime in the spring, with the exact dates depending on Meera's teaching schedule and Shalini's project deadlines. Some years that meant four months away; other years, when a project was running late or Meera had a course to teach in January, it was closer to ten weeks.

Neither of them had kept a log. There was no spreadsheet of departure and return dates, no folder of boarding passes, nothing but a loose memory of winters that blurred together into a general sense of usually being back by Easter. The stock compensation added a second layer of exposure, because if Shalini's residency status was ever found to have shifted, the tax treatment of vested and unvested options could change substantially, and the amount in question, once the accountant ran a rough estimate, sat somewhere between roughly $150,000 and $400,000 depending on how several disputed points were resolved.

What worried Shalini most was not the dollar figure. It was the uncertainty. She wanted to know, in plain terms, what the rules actually required, what it would cost to sort out, and how long it would take, because an open-ended process with an unpredictable price tag was, to her, worse than a bad number she could see coming. She had built a career on managing sites where every delay had a knowable cost; a residency question with no fixed timeline felt, to her, like a project with no schedule at all, and that was the part she found hardest to sit with.

Why this was harder than it looked

On paper, the two questions can look like versions of the same test, but they pull in opposite directions and need to be kept apart. Ontario health coverage does turn on physical presence: fall short of the required number of days in the province, spread across enough consecutive years, and eligibility can be lost even though the house, the job and the family never moved. Canadian tax residency works the other way. Someone who keeps a home, employment and family in Mississauga generally remains a resident of Canada for tax purposes no matter how many months a year they spend abroad, and leaving that status behind takes actively severing those ties, not simply racking up days away. Shalini had assumed, reasonably, that owning a home and working full time in Ontario would settle both questions at once — which turned out to be true for her tax residency, but not for the health coverage question the letter was actually asking.

The harder part was that the health authority's test does not bend for strong ties elsewhere in a person's life. It is a straight count of days spent in the province, and a reviewing body that cannot see clear travel dates has little choice but to read the gaps in the least favourable way it reasonably can. Shalini's ties to Ontario — her home, her job, the family that never left — mattered enormously for her tax residency, but they carried no weight with the health authority's day count, which meant the burden there fell entirely on evidence she had never thought to keep.

Because no contemporaneous log existed, we had to reconstruct three years of travel from secondary sources, and secondary sources are never as clean as a diary kept in real time. Credit card statements show a purchase in Florida on a given date, but not whether Shalini flew home the next day or stayed another six weeks. Phone records show a cell tower ping, not a border crossing. Each source had to be checked against the others, and where they conflicted, the gap had to be explained rather than papered over, because an inconsistent record is worse than an incomplete one.

The stock compensation added its own wrinkle. Some of it had vested during a stretch where the travel record itself was weakest, and while Shalini's unbroken ties meant her Canadian residency was never genuinely in doubt, an accountant applying that tax treatment still needed the dates nailed down, since a residency position is only as strong as the record standing behind it if it is ever questioned. That meant part of the file needed a month-by-month reconstruction, not just an annual tally, and Shalini needed to understand why the finer grain mattered before she would trust the strategy built on it. It also meant two separate audiences had to be satisfied by different tests applied to the same set of facts: a provincial health authority counting physical-presence days, and, downstream, an accountant confirming a federal residency position that turned on ties rather than days, but still needed the dates straight to defend it if it were ever challenged.

What we did

  1. Pulled every available travel record before drawing any conclusions, including credit card statements, phone billing records, airline loyalty statements and Meera's academic calendar, because building a defensible day count meant starting from documents that existed independently of anyone's memory, not from Shalini's recollection of a typical winter. This first step alone took several weeks, since three years of statements had to be requested from institutions that did not always keep records readily accessible.
  2. Built a day-by-day reconstruction spreadsheet cross-referencing every source against every other source, flagging the handful of stretches where the records disagreed or went silent, so that the eventual submission would show its work rather than simply asserting a total that nobody could check. Wherever two sources agreed independently, that date was treated as solid; wherever they conflicted, it was marked for further digging rather than resolved by guesswork.
  3. Identified and closed the genuine gaps in the record by locating a hotel confirmation email here and a parking receipt there, filling in three separate multi-week stretches where the original sources had left ambiguity, and treating each fill honestly rather than rounding in the client's favour by default. One gap, a stretch in the second year, could not be fully closed no matter what was found, and that stretch was flagged rather than quietly assumed in Shalini's favour.
  4. Mapped Shalini's residential ties in Ontario alongside the day count, documenting the continuously owned home, the unbroken employment, the family remaining in the province and the bank and health accounts never closed, because those ties were what would decide her federal tax residency even though they would carry no weight with the health authority's day count. This evidence was assembled as its own package, separate from the day count, so the tax position could stand on its own regardless of how the health-coverage review came out.
  5. Separated the stock compensation timeline from the general residency question, working out which vesting events fell inside stretches with solid documentation and which fell inside the gaps, so the exposure on that piece could be quantified honestly instead of guessed at. Of the six vesting events in the period under review, four fell inside well-documented stretches and two fell inside the one unresolved gap.
  6. Prepared a written submission to the provincial health authority laying out the day count, the supporting documents, and the residential ties, framed to answer the specific question the letter had asked rather than a broader narrative Shalini might have preferred to tell. The submission ran to several pages of exhibits, organized by year, so a reviewer could check any individual claim against the underlying document without needing to ask for it separately.
  7. Negotiated the scope and timeline of the review with the reviewing officer, Anneke, up front, securing a defined set of remaining questions and a realistic date for a decision, because Shalini's stated priority was predictability, and an open-ended review with no end point was its own kind of cost to her. That conversation also clarified exactly what additional documentation, if any, Anneke still wanted, which prevented the file from drifting into repeated, piecemeal requests.
  8. Set up a travel log template for Shalini and Meera to use going forward, a simple running record of departure and return dates kept on both their phones and reconciled against each other every few months, so that if the question ever came up again the answer would already exist rather than needing to be rebuilt from scratch at real cost in time, stress and accountant's fees.

The outcome

The provincial health authority accepted the reconstructed day count and confirmed that Shalini's Ontario health coverage remained intact for all three years in question. That decision turned on the calendar alone, once the gaps in the record were closed with hotel confirmations, parking receipts and reconciled statements; Anneke was clear that her office weighs physical presence, not ties, and that the reconstructed total simply came in on the right side of the required number of days — closer to the line than anyone would have liked, but on the right side of it.

On the tax side, every vesting event was treated on the basis that Shalini had remained an Ontario resident throughout, the position her unbroken ties to the province supported regardless of how precisely the travel record could be pinned down. Inside the one gap that was never fully closed, the accountant added a modest amount, in the low five figures, to Shalini's tax filing as a documentation cushion rather than any reflection of real doubt about her residency, consistent with her preference for a known cost over an unresolved risk. That treatment meant she paid slightly more than the position technically required, a trade-off she accepted willingly for certainty.

The process took a little over four months from the first letter to the final confirmation, close to the estimate given to Shalini at the outset, which mattered to her as much as the result itself. Predictability, in the end, was the outcome she valued most: a defined process, a realistic timeline, and a result she understood every step of the way, rather than a number that simply arrived at the end with no visibility into how it was reached.

She and Meera now keep a shared travel log every winter, a habit that turned what had been an anxious few months into a five-minute task done twice a year. Meera has said, half joking, that the log has become part of their packing ritual, filled in before the suitcases even close.

What you can learn from this

  • If you split your year between two places, keep a running log of departure and return dates as you go. Reconstructing three years of travel from receipts and phone records is possible, but it is slower and more stressful than keeping a simple diary from the start.
  • Ontario health coverage and Canadian tax residency are decided by different tests, and it matters which one you are being asked about. Health coverage turns on your day count, full stop; tax residency turns on your ties — home, job, family — and generally survives time away unless you actually sever them.
  • If your compensation includes vesting events like stock options, do not assume strong ties defend your residency position on their own. Keep dated records for the specific vesting dates too, so the position holds up if it is ever challenged, not just in principle.
  • Ask early for a defined scope and timeline from a reviewing body. An open-ended process is a cost of its own, and many reviewers will agree to a realistic schedule if you ask directly.
  • When part of a record cannot be fully reconstructed, treating that gap conservatively and disclosing it is usually a stronger position than guessing in your own favour and hoping it holds up.
This case study is entirely fictional. It does not describe any real client, file, or matter handled by Treadstone Law, and it is not a real file with details changed. All names, people, properties, businesses, dollar amounts, dates, and events are invented, and any resemblance to a real person, business, or situation is coincidental. Fictional scenarios like this one illustrate the kinds of legal issues people in Ontario commonly face and how a lawyer can help. They are general information, not legal advice — no two matters unfold the same way, and nothing here predicts the outcome of any real case. Reading a case study does not create a lawyer-client relationship. If you are facing something similar, speak with a lawyer about your specific circumstances.

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