By OptiVal Editorial Desk
Incorporating can be a smart tax move for a contractor. The problem starts when the CRA looks past the corporation and sees an employee. That is the personal services business rule in Canada, and it is one of the most expensive classification mistakes a one-person corporation can make.
If your corporation bills a single client, you show up at their office (or their Slack) every day, and your manager tells you what to do and when, the CRA may decide you are an “incorporated employee.” The bill: your corporation loses the small business deduction, pays tax at the full corporate rate plus an extra 5 percent federal penalty tax, and is allowed almost no expense deductions. In Ontario that lands at 44.5 percent combined on the corporation’s income, versus about 12.2 percent for genuine small business income. Same work, same contract, wildly different tax.
What a personal services business actually is
A personal services business (PSB) is a corporation that provides services through one individual, the “incorporated employee,” where two things are true (this is the CRA’s reading of subsection 125(7) of the Income Tax Act, set out in the CRA’s official PSB guidance):
- The person doing the work, or someone related to them, owns at least 10 percent of any class of the corporation’s shares (a “specified shareholder”).
- That person would reasonably be regarded as an officer or employee of the client if the corporation did not exist.
There are two exits from the rule. If the corporation employs more than five full-time employees throughout the year, or the services go to an associated corporation, the income is not treated as PSB income. For a one-person IT shop or solo consultant, neither exit usually applies.
Note what is NOT in the definition. The CRA does not care that your contract says “independent contractor.” It does not care that you invoice through an agency. It looks at the real working relationship: who controls how and when the work gets done, who owns the tools, and who carries the financial risk. If you work for one client the way their employees work, incorporation alone will not save you.
The tax cost: 44.5 percent in Ontario and almost no deductions
The damage comes in three layers.
Layer 1: no small business deduction. PSB income is taxed at the general corporate rate. Federally that is 28 percent (the 38 percent base rate minus the 10 percent federal abatement), and Ontario adds 11.5 percent. Then the CRA applies an additional 5 percent federal tax on PSB income under section 123.5 of the Act, reported on line 560 of the T2 return. All in, 44.5 percent combined in Ontario. A genuine small business pays about 12.2 percent on the same income.
Layer 2: nearly all expense deductions are denied. Paragraph 18(1)(p) limits what a PSB can deduct to a short list: salary, wages or other remuneration paid to the incorporated employee; benefits or allowances for that person; certain costs of selling property or negotiating contracts; and legal costs of collecting amounts owed. Your home office, your laptop, your phone, your software subscriptions, your accounting fees? All denied. On $180,000 of contract income with $9,000 of real costs, the corporation pays 44.5 percent on the full $180,000, not on $171,000.
Layer 3: the deferral almost disappears. Part of the appeal of incorporating is leaving money in the company and paying the low rate until you need it. At 44.5 percent with no deductions, that deferral shrinks to almost nothing, and dividends paid out of PSB income are taxed in your hands on top of it. (One small offset: because PSB income never got the small business deduction, it adds to the corporation’s general rate income pool, so the eventual dividends can be designated as eligible dividends. The math still favours salary or a genuine small business structure.)
Who the CRA watches most closely
The CRA runs education and audit projects aimed at PSBs, and certain patterns draw attention:
- IT consultants, developers, engineers, project managers, and finance contractors billing one end client for years.
- Working at the client’s premises, on the client’s schedule, with the client’s equipment.
- Renewing the same engagement year after year with no other clients and no real business risk.
- Placement through an agency where the end client dictates the day-to-day work.
None of these is decisive on its own. The test is always the whole relationship. But a contractor who checks all four boxes is standing in the danger zone.
How to stay off the PSB list
You do not need to abandon contracting. You need to run a real business, and be able to prove it.
Serve more than one client. This is the single strongest signal. Even meaningful side engagements help, because they show you carry the business risk of finding work.
Own the delivery. Use your own equipment, work from your own office, invoice for deliverables and milestones rather than hours, and keep real control over how the work gets done.
Take real risk. A contractor who can hire help, who gets paid on results, and who markets their services to the world looks like a business. An employee with a corporation looks like a PSB.
Document it. Keep copies of your marketing, your proposals to other clients, your own equipment receipts, and contracts that describe deliverables. If the CRA ever asks, you want a file that reads like a business, not like an employee’s desk drawer. The CRA’s employee-versus-contractor factors (control, tools, chance of profit and risk of loss, integration) are the same ones at play; our guide on how the CRA decides between contractor and employee walks through them.
Get advice before you incorporate, not after. Setting up the corporation, choosing salary versus dividends, and structuring the first contracts are the moments that decide whether the PSB rules can touch you later.
The bottom line
The personal services business rule exists to stop a simple dodge: an employee incorporating to get the small business rate. If you are genuinely running a contracting business with multiple clients, your own tools, and real risk, the rule should not catch you. If you are one person’s corporation stapled to one client’s org chart, the CRA has a 44.5 percent answer waiting.
Not sure which side of the line your arrangement falls on? We help incorporated contractors review their structure and keep their books CRA-ready. Book a free consultation, or see our services and pricing. A one-time structure review starts at our consulting rate of $125 per hour, which is cheap insurance against a reassessment.
