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

An Ajax IT Consultant's Corporation Faces a Personal Services Business Reassessment

Ayse ran her IT consulting practice through a corporation for six years before the Canada Revenue Agency reopened the file, arguing her main contract had really been employment in disguise worth hundreds of thousands in dispute.

Tax8 min readAjax, OntarioIncorporated employees
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ClientAyse, an incorporated IT consultant placed through a staffing agency
The issueA years-old agency placement reassessed as a personal services business rather than genuine consulting income
ServiceRebuilt the engagement timeline, tracked the staffing agency's own exposure, and negotiated a split-period settlement
ResolutionA negotiated compromise that reassessed only part of the engagement, roughly half the original claim

The situation

The number on the reassessment letter was roughly 312,000 dollars, plus interest that had been accumulating for nearly four years. That was what the Canada Revenue Agency said Ayse's corporation owed if her main contract with an IT staffing agency in Ajax was reclassified as employment income earned through what the Income Tax Act treats as a personal services business, rather than income earned by a genuine consulting corporation carrying on its own business.

Ayse had incorporated seven years earlier, after leaving a permanent IT support role to work as an independent consultant. Her corporation, which she wholly owned, was placed by a staffing agency into a long-term contract with a mid-sized manufacturer, doing systems administration work at the manufacturer's offices. The engagement ran for just over three years, ended on good terms, and Ayse moved on to other clients through the same corporation. Two years after that particular engagement had ended, the file was pulled for review as part of a broader look at consultants placed through that agency.

Her husband, Edwin, a chiropractor who ran his own practice through a similar corporate structure, had warned her early on that the arrangement looked risky: one client at a time, hours tracked by the agency's own timesheet system, equipment supplied by the manufacturer, and a schedule set by someone else's shift rotation. Ayse had followed the advice her accountant gave at the time, treating the corporation as an ordinary consulting business and deducting home office costs, professional development, and a portion of her vehicle. None of that history mattered much to the classification question the CRA was now raising years after the fact.

The personal services business rules exist because a corporation that functions as a stand-in for an employee should not receive the tax treatment of a genuine small business. If, absent the corporation, a worker would reasonably be considered an employee of the client, the corporation is taxed at a much higher rate on that income and loses access to most of the deductions and the small business rate it would otherwise claim. The staffing agency had placed dozens of consultants this way over the years, including professionals from entirely different fields, such as an optometrist Ayse had once met at an industry event who described an almost identical setup. Whether Ayse's three-year contract had actually crossed that line, and whether it could still be reassessed so long after it ended, was the entire dispute in front of her.

The legal question

The legal question sounds simple and is not. Personal services business status turns on whether the individual behind the corporation would, if the corporation were removed from the picture, look like an employee of the client rather than an independent contractor. The tests courts and the CRA use look at control over how and when the work is done, who supplies the tools and workspace, whether the worker carries any financial risk, and whether the arrangement is integrated into the client's regular operations rather than a discrete project. No single factor decides the question; the CRA weighs them together, and reasonable people can read the same facts differently.

Ayse's contract had features on both sides of the line. The manufacturer supplied her laptop, required her to badge in during set hours, and assigned her tasks day to day through its own IT manager, all of which pointed toward an employment relationship. But she had also, during the same period, taken on two smaller side clients through her corporation, invoiced for a defined scope of project work rather than simply for hours, and turned down an extension when the manufacturer offered one, choosing instead to move to a different contract. Those facts pointed the other way, toward a genuine business making its own decisions about which work to accept.

The other complication was timing. The engagement had ended two years before the CRA opened its review, and the file the agency built relied heavily on the staffing agency's own records of hours and instructions, records Ayse had never seen while the contract was active. Reconstructing what had actually happened, this many years on, meant piecing together emails, old calendar entries, and the terms of the original placement agreement to show which parts of the CRA's account were accurate and which were the agency's own boilerplate language rather than a description of how Ayse actually worked.

There was also a harder question sitting underneath the factual one: even if part of the engagement did look like employment, did all of it, for the entire three years, or did the working relationship shift over time as Ayse took on other clients and pushed back on some of the manufacturer's direction. A finding that applied uniformly across the whole period would produce one number. A finding that the relationship changed partway through would produce a much smaller one, and getting the CRA to look at the engagement as a timeline rather than a single fixed status became the central argument in the file.

What we did

  1. Requested the full audit file before responding to anything. Rather than answering the CRA's questionnaire point by point, we asked for the complete working file, including the specific records the auditor had relied on to conclude the manufacturer controlled Ayse's work. This mattered because it let us see, before committing to a position, exactly which documents the CRA was leaning on and which conclusions were the auditor's own interpretation rather than anything in writing.
  2. Rebuilt a month-by-month timeline of the engagement. Using old invoices, emails, and calendar records Ayse still had, we reconstructed how the working relationship had actually changed over three years, showing periods of close direction early on and much looser, project-based work later. This produced a factual record more detailed than anything the agency's own file contained, and it gave us a basis for arguing the classification should not be treated as fixed for the whole period.
  3. Identified the agency's own liability exposure. Because the staffing agency had placed Ayse and controlled the invoicing structure, it had reporting obligations of its own that were also under scrutiny once the CRA started asking questions about how the placement had been structured and billed. Recognizing this early let us anticipate how the agency itself might behave once it realized the audit could expose its own practices, rather than treating the agency purely as a neutral witness with nothing at stake.
  4. Watched the CRA move first against the agency, not against Ayse alone. Partway through the review, the CRA sent the staffing agency a separate and much broader information request covering all of its placements, not just Ayse's file. That decision, made without coordinating with Ayse's file, effectively told us the agency was now managing its own exposure and had every incentive to distance itself from claiming tight control over any individual placement, including hers.
  5. Used that shift to reframe the submission. Once the agency's own responses to the CRA started describing its consultants in looser, more independent terms than its internal timesheets had suggested, we built our written submission around that inconsistency, showing the CRA that its own broader investigation into the agency undercut the narrow, tightly controlled theory it had built specifically against Ayse's corporation.
  6. Proposed a split characterization by period rather than an all-or-nothing outcome. Instead of arguing that none of the engagement was a personal services business, we offered a middle position: the early, closely supervised months should be treated differently from the later period, when Ayse had taken on other clients and controlled her own scope. This gave the CRA a defensible way to adjust its position without abandoning its case entirely.
  7. Negotiated the final figure directly with the auditor's team lead. With the timeline, the agency's own contradictory statements, and the split-period argument on the table, we moved the discussion from written correspondence to a direct negotiation, focused on a single reassessed amount that reflected only the portion of the engagement the evidence genuinely supported, rather than the full three years the original letter had assumed.

The outcome

The file settled with a reassessment covering roughly the first sixteen months of the engagement, the period our timeline showed as most clearly resembling employment, while the CRA agreed to drop its claim for the later stretch, when Ayse had taken on other clients and largely controlled her own scope. The final adjusted amount came in close to 160,000 dollars including interest, a little under half of the original figure on the reassessment letter.

That was not a clean win. Ayse's corporation still owed a substantial reassessment, lost the small business deduction on that portion of its income for the years in question, and paid interest that had built up over the four years the file sat before it was resolved. The compromise reflected a genuine reading of a genuine grey area, not a discount handed out because the CRA had a weak case. Part of the engagement really had looked like employment, and the settlement said so.

What made the outcome workable was that it was proportional to the facts rather than to the CRA's opening position. Cutting the exposure roughly in half meant Ayse's corporation could pay the balance over an arranged schedule without threatening the business she had since built, and it avoided years of further dispute over an engagement that had already ended long before the review began. The agency's own broader exposure, once it surfaced in its responses to the CRA, gave the file leverage that a straightforward factual argument about Ayse's own contract would not have produced on its own.

Ayse changed how her corporation documents new engagements afterward, keeping a running record of scope, invoicing basis, and any side clients taken on during a contract, specifically so that if a placement is ever reviewed years later, the record exists before the CRA has to reconstruct it from someone else's files.

What you can learn from this

  • If you work as an incorporated consultant through a staffing agency, keep your own records of scope, invoicing, and any other clients you take on. Do not rely on the agency's files to describe your working relationship years later; those records serve the agency's interests, not necessarily yours.
  • A personal services business review can arrive years after a contract has ended. Do not assume a closed engagement is settled simply because time has passed. Keep documentation for longer than feels necessary, especially for any single client relationship that made up most of your billings.
  • How a working relationship is classified can change over its lifespan. If your independence grew over time, as you took on other clients or pushed back on direction, that shift matters and is worth documenting month by month rather than describing the whole engagement as a single fixed arrangement.
  • When a third party such as a staffing agency is also under review, its own responses to the tax authority can shift the ground under your file in ways you do not control. Watching how related parties respond can reveal openings that your own record alone would not show.
  • A negotiated compromise on a large reassessment is a real outcome, not a failure. Reducing exposure to reflect only the period the evidence actually supports, rather than fighting for a full reversal, can be the more realistic and less costly path through a genuine grey area in the law.
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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