Personal Services Business Canada: CRA Rules, Tax Cost, and PSB Risk

A personal services business (PSB) is a corporation that CRA treats as an employment relationship under section 125(7) of the Income Tax Act. When CRA designates a corporation as a PSB, it loses the small business deduction on all active business income and most business expense deductions. A PSB assessment can nearly double the effective corporate tax rate on the corporation's income. This guide covers how CRA decides PSB status, the industries most exposed to reassessment, and what incorporated contractors outside Quebec can do to manage their risk before CRA opens an audit.

What is a personal services business under the Income Tax Act?

The Income Tax Act defines a personal services business in section 125(7). A corporation is a PSB when its shareholder-employee would reasonably be considered an employee of the client corporation if the intermediary corporation did not exist. CRA refers to that individual as the "incorporated employee."

The definition contains one statutory exception: if the corporation employs more than five full-time employees throughout the year, it is not a PSB regardless of what the working relationship looks like. A genuine staffing firm or consulting company with a real workforce falls outside the PSB rules. A solo incorporated contractor with no arm's-length employees does not qualify for this exception.

The PSB definition is not based on what the contract between the corporation and the client says. CRA looks past the corporate structure to the actual working relationship. A corporation incorporated last month with a professional services agreement can still be a PSB if the economic reality of the engagement is employment. Canadian courts have consistently held that the legal form of an arrangement does not override the substance of the relationship for PSB purposes, and that substance is evaluated by examining how the work is actually performed, not what the contract calls it.

The consequences of PSB status apply retroactively for the open reassessment period. CRA can assess the three most recently completed tax years under the standard reassessment window, and longer if it establishes misrepresentation. A corporation that has operated unknowingly as a PSB for several years can receive a reassessment covering all of those years simultaneously.

How CRA decides whether your corporation is a PSB

CRA applies the same four-factor common law employment test to PSB determinations that it uses for worker classification across all industries. The four factors are control, tools, chance of profit and risk of loss, and integration. No single factor is determinative on its own. CRA weighs the pattern of the working relationship as a whole.

Control is the most heavily weighted factor. If the client controls how, when, where, and by what methods the incorporated worker performs their work, that points toward employment. An IT contractor required to be on-site at the client's offices, to use the client's project management system, to attend the client's daily stand-up meetings, and to follow the client's internal development standards is working under client control. That control signal is not neutralized by the fact that the contractor invoices through a corporation rather than receiving a T4.

Tools and equipment matter most in capital-intensive industries. A contractor who provides their own expensive equipment, maintains it at their own cost, and carries their own liability insurance is operating more like a genuine independent business. A contractor who shows up at the client's facility and uses client-provided workstations, software licenses, and network infrastructure looks more like an employee on the tools factor. Many knowledge-work engagements are ambiguous on this factor because a laptop is not a capital-intensive tool, but the question extends to which party bears the cost of the working environment as a whole.

Chance of profit and risk of loss asks whether the incorporated worker bears genuine business risk. A contractor who invoices at a flat monthly rate, carries no project cost overruns, cannot subcontract the work to reduce their own labour cost, and maintains no independent client relationships has no meaningful financial risk of running a separate business. This factor is where many incorporated contractors fail: they structured their corporation to limit personal liability without building any of the financial risk characteristics of an independent business.

Integration asks how economically dependent the incorporated worker is on a single client. A worker who derives all revenue from one client, has been with that client continuously for a year or more, and whose income would disappear entirely if the client relationship ended is economically integrated into the client's business in the way an employee is. An independent business maintains multiple client relationships, absorbs client attrition as a normal business event, and manages its own continuity. The integration factor is where long-term single-client engagements concentrate the most CRA risk.

The tax cost of PSB status

The financial consequence of a PSB designation is large enough that CRA reassessments in this area regularly produce six-figure tax liabilities for individual incorporated contractors.

A Canadian Controlled Private Corporation qualifies for the small business deduction on the first $500,000 of active business income, reducing the federal corporate tax rate to 9 percent. In Ontario, the combined federal and provincial rate for a qualifying small business is approximately 12.2 percent on income within the SBD limit. The same calculation for a PSB in Ontario produces approximately 26.5 percent. In British Columbia the comparison is roughly 11 percent for a qualifying small business versus approximately 27 percent for a PSB. In Alberta the rates are approximately 11 percent qualifying versus approximately 23 percent PSB.

The expense deduction restriction compounds the rate difference. A regular corporation can deduct home office costs, vehicle expenses, equipment purchases, software subscriptions, professional development, insurance, and marketing expenses against its income. A PSB corporation can deduct almost none of these. Its allowable deductions are limited to the salary paid to the incorporated shareholder-employee, employment benefits extended on the same basis as the client would extend to its own workers, and the legal costs of contesting a CRA reassessment.

In practical terms, a PSB corporation reporting $200,000 in annual revenue that believed it had $45,000 in deductible business expenses is paying tax on closer to the full $200,000 at the elevated PSB rate. The combination of denied deductions and the higher corporate rate produces a tax obligation that bears no relationship to what the incorporated contractor anticipated when they structured their business. Across three reassessment years, the total liability including arrears interest and penalties can exceed what the corporation earns in a year.

Industries with the highest exposure to PSB reassessment

Information technology contractors are the most systematically targeted group for PSB enforcement in Canada. The IT consulting industry has a long history of workers incorporating to provide services to a single employer-like client on a long-term engagement. CRA began pursuing IT contractors through the PSB rules in the mid-2010s and has continued doing so. The typical at-risk profile is an IT contractor who works on-site or remotely for a single client, uses client systems and follows client processes, cannot send a substitute when unavailable, and has been with the same client for 12 months or more. Project-based contractors who rotate between multiple unrelated clients on short engagements are at substantially lower risk. Single-client engagements are where the enforcement is concentrated.

Trucking company drivers operating under Driver Inc face a compounding problem because two separate CRA enforcement programs apply to the same corporate structure. The Driver Inc scheme, where carriers require drivers to incorporate and invoice through their corporation, is treated as employment misclassification under CRA's source deduction enforcement program. But those same Driver Inc corporations also fail every element of the incorporated employee test for PSB purposes. A Driver Inc driver who uses the carrier's truck, follows the carrier's dispatch schedule, works exclusively for one carrier, and has no financial risk of their own independent business has no meaningful counter-argument to PSB status. CRA can pursue the same Driver Inc corporation both for unremitted source deductions under misclassification enforcement and for PSB tax treatment simultaneously. The full mechanics of Driver Inc enforcement are covered at /blog/driver-inc-canada. The broader worker classification rules that apply across all industries are covered in the employee vs contractor guide.

Healthcare locum physicians and nurses who incorporate and provide services to a single clinic or hospital on a recurring basis face significant PSB exposure. The working relationship in many locum arrangements involves high client control over scheduling and clinical protocols, client-provided facilities and equipment, and no meaningful separate client base maintained by the incorporated worker. Healthcare professionals who have operated their professional corporation providing services to a single billing entity for an extended period should review their PSB exposure. This risk is distinct from the regulatory requirements of professional corporations in healthcare, which are governed by provincial health profession legislation and do not override the Income Tax Act definition of a PSB. A professional corporation can comply with provincial health regulations and still be a PSB for federal income tax purposes if the working relationship meets the incorporated employee test.

Sales agents and manufacturer's representatives who incorporate and hold exclusive or near-exclusive agency relationships with a single principal frequently resemble employees on the integration and chance of profit factors. An incorporated sales agent who works exclusively for one company, follows that company's pricing policies, covers an assigned territory, uses company-provided sales materials, and bears no independent marketing cost of their own is economically indistinguishable from a commissioned employee. The distinguishing characteristics that reduce PSB risk are maintaining multiple principals, bearing their own client relationship costs, and having the contractual right to hire sub-agents at their own expense.

Businesses that engage incorporated workers in these patterns should understand that their own exposure as the client is real. If CRA reassesses the incorporated contractor and determines the relationship is employment, the client business may receive demands for unremitted employer source deductions on the same payments. Companies that regularly engage specialists on long-term arrangements have alternatives: structured employment through a professional employer organization or employer of record service provides compliant workforce access without the misclassification risk that comes from engaging single-client incorporated contractors.

Signs your corporation may already be a PSB

Several factual patterns indicate elevated PSB risk. A corporation that matches a combination of these characteristics has likely already met the incorporated employee test under CRA's analysis.

Your corporation derived more than 80 percent of its revenue from a single client in the last completed tax year. The engagement with that client has lasted more than 12 consecutive months. You perform work at the client's premises using client-provided systems, equipment, or credentials. You cannot send a qualified substitute to perform the work on your behalf if you are unavailable. Your client's managers assign your day-to-day priorities. Your agreement contains a non-competition clause that prevents you from providing similar services to other clients. You have no employees other than yourself and no subcontractor relationships of your own. You carry no independent business liability insurance. Your corporation has only one source of revenue.

No single factor is individually dispositive, but a pattern of three or more of these characteristics is a strong signal that the corporation would not survive a CRA examination under the incorporated employee test. The time to assess this is before CRA opens an audit, not after.

How to structure around PSB risk

The five-employee safe harbour is the most reliable protection because it is statutory and leaves no room for CRA discretion. If your corporation employs more than five full-time arm's-length employees throughout the year, you fall outside the PSB definition regardless of what your client relationships look like. A genuine consulting firm with a payroll of six or more employees is not a PSB. This is why incorporated contractors who are expanding into small firms benefit from formalizing their employment relationships before they become large enough to attract audit attention on their corporate revenues.

For incorporated contractors who are not in a position to employ six workers, the risk management approach focuses on the factual elements of the engagement itself. Multiple concurrent clients distribute economic dependence and weaken the integration signal. Providing your own tools and equipment strengthens the tools factor. Maintaining your own errors and omissions insurance and business liability coverage signals that you bear independent business risk. Taking on project-specific risk, where your compensation varies based on completion rather than a fixed monthly retainer, strengthens the chance of profit factor.

Contract language matters far less than many incorporated contractors believe. CRA auditors are trained to look past contractual terminology to the actual working relationship. A services agreement that uses "independent contractor" language throughout does not protect a corporation whose working relationship looks like employment on every factual measure. What matters is how the work is actually performed, who sets the schedule, who provides the tools, and whether the incorporated worker bears any genuine financial risk from running a separate business.

Documentation of the business relationship should be built into the corporation's ordinary recordkeeping from the beginning, not assembled after a CRA inquiry arrives. Invoices should reflect project deliverables rather than hours worked where possible. The corporation should maintain its own books showing multiple client relationships, its own insurance policies, and its own capital equipment records. If the engagement with a particular client ends and the corporation's business continues, that continuity is itself evidence of an independent operation. A corporation that shuts down when a single client relationship ends looks more like a dismissed employee than a business that has lost a client.

The structural goal is to build a corporation that looks like a genuine business on the factual measures CRA uses, not one that looks like an employment relationship inside a corporate shell. A corporation with multiple clients, genuine business infrastructure, and meaningful financial exposure to its own business outcomes is in a materially different position from a single-client incorporated worker whose only business attribute is the corporate registration.

Why proper payroll matters if your corporation has employees

If your corporation employs workers and intends to rely on the five-employee safe harbour, accurate payroll administration is not optional. The safe harbour is statutory, but invoking it requires proving the facts. CRA will ask for payroll records, T4 slips, remittance receipts, and employment contracts for each of the claimed employees. A corporation that asserts it has six employees but cannot produce organized payroll documentation for those workers is not going to establish the safe harbour in an audit.

Source deductions for CPP and EI must be remitted on schedule for each employed worker. Provincial employment standards in whichever province each employee works apply in full. Workers compensation registration is required in most provinces, including Ontario (WSIB), Alberta (WCB), and British Columbia (WorkSafeBC). For carriers converting away from Driver Inc arrangements — which is a specific version of this problem because those carriers need to document that their now-employed drivers meet the headcount threshold — the payroll records from the transition period forward are the audit evidence that supports the converted employment structure. The trucking carrier payroll requirements that apply in provinces outside Quebec are covered in detail on the trucking industry page.

A professional payroll service administers source deduction calculations, remittance scheduling, provincial standards compliance, and year-end T4 preparation as core deliverables. For a corporation that is building the documented employment record needed to support a safe harbour position, these records are not just an operational convenience. They are the documentation that CRA will request first.

Quick Answers

What is a personal services business? A corporation under ITA s.125(7) where the shareholder-employee would be treated as an employee of the client if the corporation did not exist. PSB status strips the small business deduction and most expense deductions.

What tax rate does a PSB pay? The full 15 percent federal rate plus the full provincial rate, with no access to the small business deduction. In Ontario this is approximately 26.5 percent combined, more than double the qualifying small business rate.

What is the 5-employee safe harbour? A corporation employing more than five full-time arm's-length employees throughout the year is excluded from the PSB definition by statute. This is the only statutory exemption.

Who faces the most risk? IT contractors on single-client long-term engagements, incorporated trucking drivers in Driver Inc arrangements, healthcare locums placed at a single facility, and sales agents with one exclusive principal.

Can a PSB deduct business expenses? Only the salary of the incorporated shareholder-employee, equivalent employee benefits, and the legal cost of contesting a reassessment. All other business expenses are denied.

Does this apply in Quebec? This guide covers incorporated workers and businesses outside Quebec. Quebec has distinct provincial tax rules and employment standards administered by Revenu Québec. Quebec-based incorporated contractors should consult Quebec-specific resources.

Canadian businesses outside Quebec with 10 or more employees can request a free payroll structure assessment at /contact.