Worker status is the foundation, and the onus is yours
Ontario's ESA prohibits misclassifying an employee as an independent contractor, and in a dispute it is the employer who must prove the person is not an employee, not the worker who must prove they are. The CRA runs its own test through CPP and EI rulings, looking at control, tools, chance of profit and risk of loss. For an agency the safe default is clear: assignment workers go on payroll as T4 employees, and the contractor lane is reserved for genuinely independent operators, incorporated, carrying other clients, controlling their own work. For the honestly grey cases, a ruling can be requested from the CRA before the model scales, which is cheap insurance compared to the alternative.
What one reclassification costs, multiplied by the roster
Misclassification is a per-worker exposure that scales with headcount, which is why it belongs in the tax plan and not just the legal file. The arithmetic on a single reclassified worker looks like this, and an agency rarely has just one:
| Exposure | Why it stings at agency scale |
|---|---|
| CPP, both shares, retroactively | Recovering the employee share later is largely theoretical |
| EI, employee premium plus 1.4x employer share | Assessed per worker, per open year |
| Penalty of 10%, or 20% on repeat failures | Applied to amounts that should have been withheld |
| Interest at the prescribed rate, compounding daily | Reassessments usually cover multiple years |
| ESA entitlements: vacation pay, public holiday pay | 4 to 6 percent of everything already paid out |
One pattern deserves its own caution: a worker who incorporates but works like an employee for a single client risks personal services business treatment, losing the small-business rate and most deductions. That risk sits on the worker's corporation, but agencies that push placements into that shape inherit the fallout when it unwinds.
Owner pay against two different income shapes
The corporation keeps Ontario's combined rate near 12.2 percent on the first $500,000 of active income, against a top personal rate of 53.53 percent, so profit left inside the company is a genuine deferral. We usually anchor owner pay to the steadier temp margin, salary enough to create RRSP room and smooth personal cash, then let strong perm quarters flow out as dividends only when they are real and banked. The other planning point owners miss: a record perm year quietly resets next year's instalments, so we plan the payment schedule at the same time as the bonus.
Family pay in a services business has one safe lane
Reasonable wages for real work, a spouse running the back office or a daughter on the perm desk, remain fully deductible and stand outside TOSI. Dividend sprinkling is a different story: the excluded-shares escape from TOSI is generally unavailable where more than 90 percent of the business income comes from services, which describes staffing exactly. So the plan uses defensible T4 pay, documented like any other hire, and treats family dividends as the exception that needs specific advice, not the default.
Structure: shared limits, protected surplus, a clean exit
Splitting into two corporations rarely buys what owners expect, because associated companies share one $500,000 small-business limit and one EHT exemption between them. What structure genuinely offers is protection and exit value: a holding company can lift surplus cash away from a business whose main liabilities are payroll-sized, work we scope through Corporate Restructuring, and a clean operating company keeps the shares eligible for the $1.25 million lifetime capital gains exemption if a buyer ever calls, provided the balance sheet is not stuffed with passive assets when the time comes.
All of this is one conversation in practice. Our Tax Planning & Advisory engagements start from the roster and the margin report, settle the classification model, then set owner pay, family pay and structure in that order, with the year's filings handed cleanly to Corporate Tax Filing when the planning is done.
