Incorporated IT contractors increasingly work fully remotely, sometimes for a client headquartered in a different province than the one they live and work in, and sometimes moving provinces themselves partway through a contract. The corporate tax rate that applies, and in some cases which provincial return needs to be filed at all, depends on where the corporation has a permanent establishment, and that test looks at the contractor’s own working location, not the client’s.
What Establishes a Permanent Establishment
For a small incorporated contractor, the permanent establishment is generally the fixed place from which the business is actually carried on, most commonly the contractor’s home office. A corporation does not need a leased commercial address to have an establishment; a dedicated workspace in the contractor’s home, used regularly to perform the work billed to clients, is typically sufficient.
A permanent establishment can also arise where the corporation carries on business through an employee or agent who has general authority to contract on the corporation’s behalf, which matters more for consulting firms with employees in multiple locations than for a single-owner contractor corporation, but becomes relevant the moment a contractor corporation hires its first employee in a different province.
The Client’s Location Does Not Determine the Province
This is the point that causes the most confusion. A contractor incorporated and working from a home office in Ontario, billing a client whose head office is in Alberta or British Columbia, is not creating a permanent establishment in the client’s province merely by having that client. The corporation’s own establishment, where the contractor actually performs the work, is what determines provincial allocation, not where the invoice is sent or where the client’s payroll originates.
This holds even for long-term, single-client arrangements that resemble an ongoing employment relationship in substance. A contractor working exclusively for one out-of-province client for years, entirely from a home office in their own province, is still allocating income to the province of that home office.
The Ottawa-Gatineau Case
The Ottawa-Gatineau federal government contracting market is a common version of this question, since a large share of federal IT contracting work is delivered by contractors living in Ontario but doing work that touches departments physically located across the river in Gatineau, Quebec. The contract being with a federal department in Gatineau, or the work occasionally requiring presence at a Gatineau location, does not shift the permanent establishment away from an Ontario home office if that is genuinely where the corporation’s business is carried on.
The analysis changes if the contractor actually relocates to the Quebec side, whether Gatineau or elsewhere in Quebec, and begins working from a home office there. At that point the corporation has an Ontario-side history and a Quebec-side establishment going forward, and the split-year allocation discussed below applies. Contractors in this position should also review the Quebec establishment guide for the CO-17 and QST registration questions that come with an actual Quebec establishment, which are separate from the provincial income allocation question covered here.
Allocating Income Across Provinces Mid-Year
When a corporation has a permanent establishment in more than one province during the same taxation year, generally because the contractor relocated partway through, provincial taxable income is allocated using a formula based on gross revenue and salaries and wages reasonably attributable to each province’s establishment, applied proportionately to the period each establishment existed. This is not a simple day-count split; it depends on where the revenue-generating activity and any wages were actually attributable during each period.
A contractor who moves from Ontario to Quebec on, for example, September 1, has an Ontario establishment for roughly eight months and a Quebec establishment for the remaining four, and the corporation’s taxable income for the year gets allocated between the two provinces based on that formula rather than assumed to belong entirely to the province where the corporation happened to be at year-end. This affects which provincial corporate tax rate applies to which portion of income, and in the Quebec case, whether a CO-17 return needs to be filed for the year at all.
Why This Matters for Rate and Filing Purposes
Provincial corporate tax rates differ meaningfully; Ontario’s combined small business rate is different from Quebec’s, and other provinces vary further still. Getting the establishment province wrong, whether by defaulting to the client’s location or by assuming a full-year allocation to a province the contractor only occupied for part of the year, produces an incorrect provincial tax calculation and, in the Quebec case specifically, can mean a missed CO-17 filing obligation or an unnecessary one.
What to Review
Before finalizing a T2 return for a remote contractor corporation:
- Confirm where the contractor actually performed the work during the year, not where any client was headquartered
- Confirm whether the corporation had an establishment in more than one province at any point during the year, including a mid-year relocation
- If more than one province applied, confirm the revenue and wage allocation used to split taxable income between them
- Confirm whether a Quebec establishment, even briefly, triggers a CO-17 filing requirement in addition to the federal T2
- Do not treat a client’s location, including federal government departments physically located in a different province than the contractor, as relevant to the establishment test
The switching accountants guide covers the records handover process relevant to contractors who relocated provinces mid-engagement and are also changing accountants around the same time.