Key takeaways
- A Canadian professional corporation (PC) has two address surfaces, not one — the provincial corporate registry (OBCA, BCBCA) and the profession's regulator (CPSO, LSO, CPA, RCDSO, PEO, and BC equivalents). Changing one does not change the other.
- The registered office must be a real street address inside the province of incorporation and cannot be a P.O. Box — Canada Post Unit/# format from a commercial mailbox provider satisfies both registry and regulator address fields for most professions.
- PC name rules require the words "Professional Corporation" (or "Professional Medicine Corporation," "Law Corporation," etc., depending on the profession and province) to appear in the legal name — and the regulator usually pre-approves the name before the registry will accept the Articles.
- Whether a virtual address is permitted for the regulator's address-of-record varies by profession: medicine, law, and engineering typically allow a non-clinical business address; dentistry and some clinical practices have additional patient-record location rules that constrain the choice.
Short answer
A professional corporation in Canada is not a general business corporation with a different label. It is incorporated under the same statute (CBCA, OBCA, or BCBCA), but it can only be authorised by the professional regulator for that profession in that province, and it carries name and address obligations that flow back to the regulator on top of the corporate registry. The registered office address is governed by the corporate statute — it must be a real street address inside the province and cannot be a P.O. Box. The regulator's address-of-record is governed separately and updated through the regulator's own portal (CPSO's online filing centre, LSO's Lawyer Portal, CPA Ontario's member portal, RCDSO's online services, PEO's licence portal, and the BC equivalents). Changing your registered office at ServiceOntario or BC Registries does not update the regulator's file, and vice versa.
Why a professional corporation's address question is not a regular corporation's
A regular Canadian small corporation has one address surface that matters most of the time: the registered office on the Articles, which is also where most CRA, court, and registry mail arrives. We covered that single-surface case in Registered Office vs Records Office vs Head Office in Canada.
A professional corporation has two surfaces:
- The provincial corporate registry (Ontario Business Registry for OBCA PCs, BC Registries for BCBCA PCs, Corporations Canada is generally not used because most professional statutes require provincial incorporation). The registered office rule here is identical to a regular corporation — physical street address inside the province, no P.O. Box.
- The professional regulator for the profession in that province (CPSO for Ontario physicians, LSO for Ontario lawyers, CPA Ontario for accountants, RCDSO for Ontario dentists, PEO for Ontario engineers, and the BC counterparts). Each regulator maintains its own register of corporations authorised to practise the profession, with an address-of-record that is often partially public.
Because the regulator approves the corporation's existence as a professional corporation — not just as a corporation — most provincial registries will not file the Articles until the regulator has issued a Certificate of Authorisation (or its provincial equivalent) for that legal name. The address you list on the regulator's application is therefore set before the registered office is finalised on the registry side, and the two need to be consistent.
Which professions can incorporate as a PC, by province
Each Canadian province defines a closed list of regulated professions that may form a professional corporation. The list is not identical across provinces, but the major regulated professions covered below all permit PCs in Ontario and British Columbia, which together host most of the Canadian PC population.
| Profession | Ontario regulator | BC regulator |
|---|---|---|
| Physicians and surgeons | CPSO | CPSBC |
| Lawyers | Law Society of Ontario (LSO) | Law Society of BC (LSBC) |
| Chartered Professional Accountants | CPA Ontario | CPABC |
| Dentists | RCDSO | BC College of Oral Health Professionals |
| Professional Engineers | PEO | EGBC |
| Veterinarians | CVO | CVBC |
| Chiropractors, optometrists, psychologists, social workers, architects | Profession-specific Ontario college | Profession-specific BC college |
A profession not on the provincial list cannot form a PC at all — the Articles simply will not be accepted by the registry without the regulator's authorisation, and no regulator exists for an unregulated profession. Founders sometimes ask about marketing consultants, management consultants, or software engineers wanting a "professional corporation" — those are regular business corporations, not PCs. The "engineer" PC pathway is only for licence-holders of PEO or EGBC.
Registered office — same rule as a regular corp, no P.O. Box
The corporate statute side of a PC's address rule is identical to any other Canadian corporation:
- Ontario PC under OBCA: A registered office in Ontario set out in the Articles. The street address — not just the municipality — is required. P.O. Boxes are rejected.
- BC PC under BCBCA: A registered office in BC accessible during business hours for record delivery and inspection. P.O. Boxes are rejected.
- Federal CBCA PCs: Most provincial professional statutes mandate provincial incorporation specifically (Ontario's Business Corporations Act and the profession's authorising statute, BC's BCBCA and the profession's Health Professions Act / Legal Profession Act / etc.), so federal incorporation under CBCA is uncommon for PCs. If your profession does allow CBCA incorporation, the federal s.19 registered-office rule applies — Canadian province specified in the Articles.
A commercial street address in Canada Post Unit/# format from a licensed mailbox provider satisfies the registered-office requirement on every PC filing surface. Toronto Auteur addresses work for an Ontario PC; Vancouver Auteur addresses work for a BC PC. The single hard constraint is jurisdictional alignment — an Ontario PC cannot use a Vancouver address as its registered office, and vice versa, because OBCA and BCBCA each require the registered office to be inside their own province.
PC name rule — the words "Professional Corporation" are mandatory
Every Canadian PC must include words in the legal name that signal its professional-corporation status. The exact wording is set by each profession's authorising statute, not by general corporate law:
- Ontario physicians (Medicine Act, 1991): The name must include the words "Professional Corporation" or "Medicine Professional Corporation" and must include the surname of one of the shareholders followed by their professional designation (e.g., "Dr. Surname Medicine Professional Corporation").
- Ontario lawyers (LSO By-Law 7): The name must include "Professional Corporation" or "Law Professional Corporation" along with the surname of at least one shareholder who is a licensee.
- Ontario CPAs (CPA Ontario regulations): Name must include "Professional Corporation."
- Ontario dentists (RCDSO regulations under the Dentistry Act): Name must include "Professional Corporation" or "Dentistry Professional Corporation."
- Ontario engineers (Professional Engineers Act): A holding "permit to practise" is required for the corporation; the corporation does not always need "Professional Corporation" in the name, but PEO's Certificate of Authorization is required before the corporation can offer engineering services to the public.
- BC PCs (under the Business Corporations Act and the profession's authorising act): Most BC professional statutes require analogous naming — "Law Corporation," "Medical Corporation," "Dental Corporation," "Veterinary Corporation," "Notary Public Corporation," etc.
In every case, the regulator must approve the corporate name before the registry will file the Articles. The order of operations is: regulator name approval → regulator Certificate of Authorisation → Articles filed with the provincial registry → registered office set. The address on the regulator application is therefore the first address chosen, and the subsequent registry filing should match it unless a deliberate split is being created.
Regulator address-of-record — a separate filing surface from the registry
This is the under-discussed part. Every Canadian professional regulator maintains its own register of authorised professional corporations, with an address field that is updated through the regulator's portal, not through the provincial registry. The regulator's address is the one that controls:
- Where the regulator mails Certificate of Authorisation renewals, complaint notices, audit letters, and discipline correspondence.
- What address appears in the public-facing regulator directory if the regulator publishes corporation addresses (some do, some do not, varies by profession).
- Where members of the public can find the corporation if they want to file a complaint, request records, or verify a licence.
| Regulator | Address surface | Public visibility |
|---|---|---|
| CPSO (Ontario physicians) | Practice address on the public register | Practice address is publicly searchable |
| CPSBC (BC physicians) | Practice address on the public register | Practice address is publicly searchable |
| LSO (Ontario lawyers) | Business address on the Lawyer Directory | Business address publicly searchable |
| LSBC (BC lawyers) | Business address on the Lawyer Lookup | Business address publicly searchable |
| CPA Ontario / CPABC | Firm address on the firm register | Firm address typically searchable |
| RCDSO (Ontario dentists) | Practice address on the public register | Practice address publicly searchable |
| PEO (Ontario engineers) | Certificate of Authorisation business address | Holder of permit publicly searchable |
| EGBC (BC engineers) | Permit to Practise business address | Permit holder publicly searchable |
The key practical consequence: a change of registered office at ServiceOntario or BC Registries does not update the regulator's address. Both filings must be made independently. The current AI Overview for Canadian professional-corporation address requirements summarises the structure directly:
A professional corporation in Canada requires a registered office address located within the province of incorporation to receive official documents, which cannot be a P.O. Box. The address must be a physical location accessible online though using a lawyer's office or a dedicated service address can maintain privacy. Changes must be filed through the Online Filing Centre or to provincial regulators (e.g., CPSO for physicians).
A commercial street address in Canada Post Unit/# format works on both surfaces because the address itself doesn't change — only the propagation does. Update the registry side through the provincial corporate registry's Online Filing Centre, and update the regulator side through the regulator's own portal in the same session.
Privacy options — lawyer's office vs dedicated service address
Most Canadian professional regulators publish at least one corporation address on a public register. For a PC whose only practice premises is the practitioner's clinic or office, that is often acceptable — the public register address and the clinical premises are the same and the practitioner expects patients or clients to find them there.
For a PC whose practitioner does not want their clinical or operational address on the public register — for example, a physician who does telemedicine from home and doesn't want home appearing as a public practice address, or a lawyer running a virtual practice — there are two recognised privacy paths:
- Lawyer's office or accountant's office as the corporation's address. Used by some incorporated practitioners who already have a corporate counsel relationship. The law firm acts as registered office and sometimes as records office. This is the path the AI Overview alludes to in "using a lawyer's office… can maintain privacy."
- Dedicated service address — a commercial Canada Post Unit/# address from a licensed mailbox provider. This is the configuration the AI Overview describes as "a dedicated service address." The address satisfies the corporate registry's registered-office rule, satisfies most regulators' business-address-of-record field, and keeps the practitioner's home off the public record.
The boundary between "permitted" and "not permitted" for the regulator side is profession-dependent:
- Permitted at the regulator address-of-record for most professions: Medicine (CPSO, CPSBC), law (LSO, LSBC), accountancy (CPA Ontario, CPABC), engineering (PEO, EGBC), most consulting health professions.
- Constrained for some clinical professions: Dentistry, veterinary medicine, and certain regulated health professions (RCDSO, CDS BC, CVO, CVBC) typically require the clinical premises — where patient or animal records are kept and where treatment is delivered — to be on the regulator's file separately from the corporate registered office. A virtual address can still be the registered office for the corporation; the regulator's clinical-premises field may need to be the actual clinic.
The practical pattern: virtual address for the corporate registry's registered office in nearly every PC; virtual address also for the regulator's business address-of-record in non-clinical professions (consulting medicine, law, accountancy, engineering, telemedicine); clinical-premises field separately maintained at the regulator for in-person clinical practice.
Order of operations — getting a PC's address right the first time
A new PC's address propagates across several surfaces in a specific order. Founders who file pieces out of sequence often have to re-file at one or more regulators after the corporate registry rejects the name or address.
- Choose the legal name with the regulator's required wording for the profession ("Dr. Surname Medicine Professional Corporation," "Surname Law Professional Corporation," etc.).
- Apply to the regulator for the Certificate of Authorisation, Permit to Practise, or equivalent. Submit the proposed legal name and the business address you intend to use as the corporation's address-of-record.
- Receive the regulator's authorisation — name approved, business address recorded, certificate issued.
- File Articles of Incorporation with the provincial corporate registry (Ontario Business Registry for OBCA or BC Registries for BCBCA). The registered office on the Articles must match the regulator's address-of-record, or the PC will carry an inconsistent file from day one.
- Register with CRA for a Business Number, GST/HST account (if applicable for the profession; many medical and dental services are GST/HST-exempt under the Excise Tax Act, but accountancy and law are generally taxable), and payroll account if the PC employs the practitioner as a T4 employee.
- Set up a business bank account. Most Canadian Big Five banks have specific KYC workflows for professional corporations — the bank will ask for the regulator's Certificate of Authorisation alongside the Articles. The business banking checklist in Opening a Business Bank Account in Canada with a Virtual Address covers the documentation expected.
A virtual address from Auteur fits cleanly at step 2 (regulator application) and step 4 (registry filing) simultaneously because the address itself is identical on both. For Ontario PCs, use a Toronto address; for BC PCs, use a Vancouver address. Use the same Canada Post Unit/# format on every surface from day one and the regulator-vs-registry split stays a non-issue.
Where Auteur fits in the Canadian PC address landscape
Auteur is Canadian-owned, with Toronto and Vancouver commercial addresses sized for the two provinces that host most Canadian PCs. The address format follows Canada Post Unit/# convention so it passes both the corporate registry (OBCA registered office, BCBCA registered office) and the regulator's address-of-record field on the portals listed in the table above.
Three things to confirm before you use a virtual address for a PC's regulator-of-record field:
- Profession's address policy. Medicine, law, accountancy, and engineering generally permit a non-clinical business address. Dentistry, veterinary medicine, and certain clinical health professions require the clinical premises separately. Check the by-laws of your regulator (linked above) before filing.
- Province alignment. Ontario PC → Toronto address. BC PC → Vancouver address. The OBCA and BCBCA both require the registered office to be inside their own province.
- Name pre-approval. The regulator approves the corporate name before the registry files the Articles. The address goes on the regulator's application first, then on the Articles.
Reserve a Toronto or Vancouver address and you can put the same address on the regulator application, the Articles of Incorporation, the CRA Business Number registration, and the business bank account.
FAQ
What is the registered office address in Canada? The registered office is the legally mandatory address for any Canadian corporation — the address where Corporations Canada (federal), the Ontario Business Registry (OBCA), or BC Registries (BCBCA), as well as courts and litigants, can serve documents. For a professional corporation, the registered office is set under the same corporate statute as any other corporation (it must be a physical street address inside the province of incorporation and cannot be a P.O. Box). The PC additionally has a regulator address-of-record — a separate field maintained at CPSO, LSO, CPA, RCDSO, PEO, or the BC equivalent. Updating one does not update the other.
Who can have a professional corporation in Canada? Only licence-holders of a profession whose provincial statute explicitly authorises professional corporations. In Ontario, the regulated professions that can form a PC include physicians (CPSO), lawyers (LSO), chartered professional accountants (CPA Ontario), dentists (RCDSO), professional engineers (PEO), veterinarians (CVO), chiropractors, optometrists, psychologists, social workers, and architects, among others. In BC, the BCBCA together with the profession's authorising statute defines an analogous list including physicians (CPSBC), lawyers (LSBC), CPAs (CPABC), dentists, engineers (EGBC), and others. Unregulated professions — marketing consultants, management consultants, software developers — cannot form a PC and must use a regular business corporation.
What is an officially registered address? In Canadian corporate law, an "officially registered" address most commonly refers to the registered office filed on the corporation's Articles of Incorporation and maintained at the provincial or federal corporate registry. The address is public on the registry's online search. For a professional corporation, the equivalent "officially registered" surface also includes the regulator's address-of-record on the public register maintained by the regulator (e.g., CPSO's public Doctor Search shows the practice address). Both surfaces are independently maintained and both must be kept current.
Bottom line
A Canadian professional corporation lives on two address surfaces — the provincial corporate registry and the profession's regulator — and the rules are not identical. The registered office rule is straightforward: physical street address inside the province, no P.O. Box, Canada Post Unit/# format from a licensed provider satisfies it. The regulator side is the part most online guidance skips: CPSO, LSO, CPA Ontario, RCDSO, PEO, and the BC counterparts each maintain their own address-of-record on their own portal, and updating the registry does not propagate to them.
For non-clinical professions (consulting medicine, law, accountancy, engineering), a single Auteur address in Toronto or Vancouver covers both the registry's registered office and the regulator's business address-of-record. For clinical professions with patient-record obligations, the virtual address handles the corporate registry side cleanly and the clinical premises stay on the regulator's clinical-premises field separately. If you're choosing between federal, Ontario, and BC incorporation in the first place, the federal vs Ontario vs BC incorporation comparison covers the jurisdiction decision; if you're deciding what kind of address goes on the Articles, Registered Office vs Records Office vs Head Office in Canada covers the general corporate case behind the PC layer.
Reserve a Toronto or Vancouver address and the same Canada Post Unit/# format works on the regulator application, the Articles, the CRA Business Number file, and the business bank account from day one.