The situation
The number in the reassessment letter was close to two hundred and ten thousand dollars, once the CRA added up the disallowed personal credits, the reversed corporate deductions tied to Nadira's care arrangement, and four years of accumulating interest. It was the kind of figure that could have forced Nadira to sell equipment or lay off crew just to keep the business solvent while the dispute played out, and that was the part that alarmed her most, more than the number itself, because the business was not just her livelihood but the livelihood of the eleven people who worked for her.
Nadira owned and ran a small construction company out of Dunnville, working as its project manager on mid-sized residential and light commercial jobs while also holding the majority of its shares. She had lived for years with a chronic condition that limited her mobility and stamina, and as her workload grew, she had arranged part-time attendant care to help with tasks at home in the mornings and evenings, a few hours a day rather than around-the-clock support, so she could keep working full days on-site without the condition forcing her to slow down the business she had spent a decade building.
She claimed the disability tax credit on her personal return, as she had for years without issue, and began separately claiming a portion of the attendant care costs as a medical expense once the part-time arrangement started. Her husband, Omar, an actuary, helped her track the household finances and understood the numbers involved better than most people would, but neither of them had reason to think the two claims together would draw scrutiny, since both were, in principle, permitted under the rules governing medical and disability claims, and neither claim on its own had ever been questioned before, so the reassessment letter arrived without any real warning that anything about the filings was considered unusual.
The CRA's position, once the audit began, was that Nadira could not claim meaningful attendant care costs and the full disability tax credit in the same years without running afoul of a rule that limits how the two interact, and it proposed disallowing a large share of both claims retroactively, along with related deductions the corporation had claimed for a portion of the care costs it had helped cover as part of an informal employment-related arrangement.
Why this was harder than it looked
On its face, this looked like a straightforward question of whether two specific credits could be claimed together. In practice, it was harder, because the rule governing the overlap between the disability tax credit and attendant care expenses is not a flat prohibition. It permits a limited amount of attendant care to be claimed as a medical expense alongside the disability credit, provided the care falls within certain thresholds and is not full-time or comprehensive enough to represent the kind of support the rules treat as incompatible with the credit. Getting the calculation right meant working through several years of care arrangements that had shifted in scope as Nadira's needs changed, rather than applying one flat figure across the whole period under review.
The corporate side added another layer. The construction company had, in some months, reimbursed a portion of the attendant care costs as part of an informal arrangement recognizing the toll the workload took on Nadira's health, and the CRA had reclassified those reimbursements as a taxable shareholder benefit rather than a legitimate business expense, which increased both the corporate reassessment and Nadira's personal income for the years involved, effectively taxing the same dollars twice from two different directions. Untangling what had genuinely been a reasonable accommodation from what looked, on paper, like the corporation quietly subsidizing personal care required going back through years of internal records that had never been kept with this specific question in mind.
Ngoc, the corporation's bookkeeper, had recorded the reimbursements consistently but had never flagged them for special tax treatment, since nothing about the arrangement had seemed unusual at the time it was set up and no one had raised a concern about it in years of routine filing. That meant reconstructing the intent and structure of the arrangement years after the fact, largely from emails, invoices, and Nadira's own recollection of conversations with her accountant back when the arrangement first began.
The hardest constraint, though, was time. Nadira's business had two active job sites and a third about to break ground, and she could not step back from managing them to spend weeks buried in a tax file without risking delays that would cost the business far more than the dispute itself. Every meeting, every document review, and every strategic decision had to happen in the margins of a schedule that did not have margins to spare, which meant the file had to move efficiently or risk stalling entirely against both a project timeline and a CRA response deadline running in parallel.
What we did
- Mapped the attendant care arrangement year by year against the applicable limit. Rather than treating the four years as one continuous claim, we broke the care arrangement into the periods where its scope had actually changed, since the hours and cost of care had grown gradually as Nadira's condition and workload both evolved, and calculated separately for each period whether the amount claimed fell within the threshold the rules allow when paired with the disability credit.
- Gathered updated medical documentation confirming the ongoing basis for the disability tax credit. The original certification was still valid, but a supporting letter from Nadira's treating physician describing the specific daily limitations and explaining why part-time rather than full-time support was clinically appropriate gave the reassessment reviewer a far clearer picture of her actual circumstances than the original paperwork alone provided.
- Reconstructed the corporate reimbursement arrangement from the underlying records. Working closely with Ngoc, we pulled every invoice, internal note, and payment record tied to the corporation's contributions toward care costs across the full period, establishing a clear pattern that showed the arrangement had been structured and applied consistently rather than assembled after the fact simply to minimize tax owing.
- Built the argument that the corporate contributions were a legitimate, documented accommodation rather than a disguised personal benefit. This meant framing the arrangement in terms of what it actually was, a modest accommodation that kept a working owner-manager able to run her projects and her crew, supported by the consistent recordkeeping Ngoc had maintained for years without ever anticipating it would matter this much to an audit.
- Scheduled every meeting and document exchange around Nadira's site commitments rather than the other way around. Because Nadira could not pause her project schedule to accommodate a lengthy dispute, we ran short, focused calls early in the morning or after site hours ended, prepared documents for her to review rather than draft from scratch, and kept her direct involvement limited strictly to the decisions only she could make.
- Submitted a consolidated response addressing the personal and corporate reassessments together. Because the two issues were connected through the same underlying facts and the same care arrangement, we presented them to the CRA as one coordinated file rather than two separate disputes running independently on their own timelines, which avoided inconsistent findings between the personal and corporate sides of the exact same story.
- Pressed for a reviewer with authority to resolve both files concurrently. Separate reviewers working the personal and corporate sides independently can reach different, even contradictory conclusions on identical facts, so we specifically requested coordination between the two files early on, which shortened the overall timeline considerably once the request was granted and a single reviewer took carriage of both.
The outcome
The CRA accepted the year-by-year attendant care calculation in full, confirming that the amounts claimed alongside the disability tax credit fell within the permitted threshold in every single year at issue. The personal reassessment was reversed entirely, restoring both credits exactly as originally claimed and eliminating the personal portion of the dispute without any compromise on Nadira's side, a result that was not guaranteed given how closely the calculation had to track the annual threshold in some of the years involved.
On the corporate side, the reviewer accepted the reconstructed documentation as sufficient to treat the reimbursements as a legitimate accommodation rather than a taxable shareholder benefit, reversing that portion of the corporate reassessment as well. Combined, the two reversals eliminated essentially the entire amount originally in dispute, close to the full two hundred and ten thousand dollars once the accrued interest was recalculated downward alongside the underlying tax, though the process took the better part of a year from the initial reassessment to final resolution, longer than anyone involved would have preferred.
Nadira did not step back from her projects at any point during the file, and the third job site broke ground on schedule while the dispute was still being worked through in the background. Ngoc now flags any recurring corporate payment connected to a shareholder's personal circumstances for early review rather than routine filing, and Nadira keeps a simple annual note documenting the scope of her care arrangement, so that any future change in her needs is on record as it happens rather than pieced together years later from memory and scattered invoices.
What you can learn from this
- Attendant care and the disability tax credit are not automatically incompatible. A limited amount of part-time care can often be claimed alongside the credit, but the calculation depends on thresholds that need to be checked year by year.
- A business quietly covering part of an owner's personal care costs needs to be documented as a deliberate, consistent arrangement from the start, or it risks being reclassified as a taxable benefit years later.
- When personal and corporate reassessments arise from the same facts, presenting them to the CRA as one coordinated file tends to produce faster and more consistent results than treating them as separate disputes.
- You do not need to pause a business to fight a tax reassessment properly, but the professionals handling it need to work around your operational reality rather than expect you to work around theirs.
- Keep a simple, contemporaneous record whenever a personal medical or care arrangement changes in scope. A short note made at the time is worth far more, years later, than a reconstructed memory of when and why something changed.
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