CPA Professional Corporation Ontario: Registration Guide 2026
A CPA professional corporation Ontario accountants set up is usually about tax planning — earning practice income at the small business rate inside a corporation and deferring the personal tax hit until money is drawn out. But for a Chartered Professional Accountant it is never a single filing. The structure is a two-step product: first you incorporate under Ontario's Business Corporations Act (OBCA) through the Ontario Business Registry, and then you register the corporation with CPA Ontario — and, if it will practise public accounting, obtain a certificate of authorization from CPA Ontario as well.
CPA Ontario regulates the profession under the Chartered Professional Accountants of Ontario Act, 2017, and it treats the professional corporation as a category of registered firm. This guide walks through both steps, the shareholder rules that keep ownership inside the profession, the fees CPA Ontario publishes, and the parallel renewals that keep the corporation alive. Tax angles are described factually only — run your own numbers with your accountant.
Key facts at a glance
| Item | Ontario rule |
|---|---|
| Governing legislation | Business Corporations Act (Ontario) + Chartered Professional Accountants of Ontario Act, 2017 |
| Corporate registry | Ontario Business Registry (ServiceOntario) |
| Regulator & required authorization | CPA Ontario — professional corporation registration; certificate of authorization (COA) if practising public accounting |
| Naming rule | Must include "Professional Corporation"; firm-name pre-approval available through CPA Ontario's My Portal before you incorporate |
| Who may hold voting shares | Members of CPA Ontario, other professional corporations registered as firms with CPA Ontario, or a combination |
| Family shareholders allowed? | No — all shareholders must be CPA Ontario members or registered professional corporations |
| Registry filing fee | $300 (articles of incorporation, online or by mail) |
| Regulator fees | $180 + HST professional corporation registration; $123.81 + HST certificate of authorization; $260 + HST Annual Practitioner Due per CPA on the firm roster |
| Renewal cycle | CPA Ontario Annual Practitioner Due by September 30; registry annual return within 6 months of fiscal year-end |
How to set up a CPA professional corporation in Ontario
- Check whether your firm name needs pre-approval — CPA Ontario tells members to submit the request through My Portal before incorporating.
- Include "Professional Corporation" in the name — the OBCA requires it, and a professional corporation carries a real name rather than a number.
- Draft articles restricting the business to the practice of the profession and limiting share ownership to eligible holders.
- File articles of incorporation at the Ontario Business Registry — $300, processed immediately online.
- Register the corporation as a firm with CPA Ontario through My Portal (Obligations and Requests ► Applications).
- Add a certificate of authorization (COA) if you will practise public accounting — audits, reviews and other regulated assurance work. Registration alone is not enough, and at least one shareholder must hold the required licence.
- Start before mid-November. CPA Ontario warns that applications submitted later may not be registered by December 31 — which matters if you want the corporation earning income that calendar year.
- Renew both tracks annually — CPA Ontario registration and the registry annual return.
The two sections below cover each track in full.
Step 1: Incorporate at the registry
The corporation itself is created under the OBCA through the Ontario Business Registry. The government fee for articles of incorporation is $300, processed immediately online; a professional corporation carries a real name rather than a number, so you will also need an Ontario-biased NUANS name search report to support it.
Get the name right before you file. The OBCA requires a professional corporation's name to include the words "Professional Corporation", and CPA Ontario's own registration guidance tells members that if a firm-name pre-approval is required, the request should be submitted through My Portal prior to incorporation. CPA Ontario provides a dedicated firm name pre-approval process so the name is cleared before you spend money on articles — fixing a rejected name afterwards means filing articles of amendment at the registry.
Your articles should also restrict the business of the corporation to the practice of the profession and limit share ownership to eligible holders, so that the corporation arrives at CPA Ontario already compliant with the OBCA's professional-corporation conditions.
Step 2: Register with CPA Ontario (and get a COA if you need one)
Once the certificate of incorporation is issued, the corporation must be registered as a firm with CPA Ontario. Per CPA Ontario's registration pages, the application is made online: log in to My Portal and select Obligations and Requests ► Applications ► Start New Application ► Firm Registration. Applications are usually processed within three to five weeks of receipt, and the published registration fee is $180 + HST.
If the corporation will engage in public accounting — audits, reviews, and other regulated assurance work — registration alone is not enough. The corporation also needs a certificate of authorization (COA), applied for in My Portal under Firm Dashboard ► Applications ► Start New Application ► Certificate of Authorization (COA) Application. At least one shareholder must hold, or apply for, a current public accounting licence (PAL). The COA fee is $123.81 + HST and processing again runs about three to five weeks. CPA Ontario notes one carve-out: a COA may not be required where the professional corporation is simply a partner or shareholder in another firm that issues statements under that firm's name.
Timing matters at year-end. CPA Ontario warns that applications submitted after mid-November may not be registered by December 31 — if you want the corporation earning income in a given calendar year, start early. If you need supporting documents for the application file or your bank — a certificate of status or certified copies — we can pull them same-day through a corporate profile report order.
Shareholders, directors and restrictions
Ownership stays inside the profession, with no family exception. CPA Ontario states that shareholders of a professional corporation can be one or more members of CPA Ontario, other professional corporations registered as firms with CPA Ontario, or a combination of both, and its firm registration requirements confirm that for a professional corporation all shareholders must be CPA Ontario members — a rule anchored in the OBCA and the CPA Ontario Act, 2017. Unlike Ontario physicians and dentists, accountants have no regulation allowing spouses, children or parents to hold non-voting shares, and private-equity ownership structures are expressly off the table.
Structure changes are supervised: firms must disclose any change to the information in their original registration — shareholders, structure, practice composition — to the Registrar before the change takes place, and changes are subject to approval. A professional corporation formed outside Ontario that provides public accounting services in the province must also register as a firm with CPA Ontario.
Keeping it alive: annual renewals
Two compliance tracks run side by side.
CPA Ontario track. Registered firms, including professional corporations, pay the Annual Practitioner Due (APD) of $260 + HST per CPA member on the firm's roster, due September 30 each year for the October-to-September cycle, with a $45-per-member late charge after October 31. A shareholder holding a public accounting licence renews the PAL at $190 + HST, due October 1. Fee amounts come from CPA Ontario's Schedules of Firm Dues and Fees.
Registry track. The corporation files its annual return through the Ontario Business Registry within six months of its fiscal year-end (no government fee) and must keep directors, officers and the registered office current. Persistent non-filing can end in cancellation of the corporation itself — which takes the CPA Ontario registration down with it.
Our professional corporation renewals guide tracks both calendars and what to do if either registration has lapsed.
Why accountants incorporate
The logic is the one CPAs explain to their own clients. Active practice income retained in a Canadian-controlled private corporation is taxed at the small business rate rather than top personal marginal rates, deferring tax on income you leave inside the company. Salary-versus-dividend mix adds income-timing flexibility, and on an eventual sale, shares of a qualifying small business corporation may access the lifetime capital gains exemption. None of this reduces professional liability — incorporation does not shield a CPA from responsibility for their own professional acts — and whether the structure beats its running costs depends on your income and draw pattern. Even accountants should model it properly: confirm the plan with your own tax advisor.
Frequently asked questions
How much does a CPA professional corporation cost in Ontario?
Government and regulator fees total roughly $600 to start: $300 for articles of incorporation at the Ontario Business Registry, $180 + HST for professional corporation registration with CPA Ontario, plus a NUANS report. Add $123.81 + HST for a certificate of authorization if you practise public accounting. Ongoing: $260 + HST Annual Practitioner Due per CPA, due September 30.
Do I need a certificate of authorization from CPA Ontario?
Only if the corporation practises public accounting — audit, review and other regulated assurance engagements. At least one shareholder must then hold or apply for a public accounting licence. If the corporation only provides non-licensed accounting services, firm registration suffices; and a COA may not be needed where the corporation is merely a partner in another firm issuing statements under that firm's name.
Can my spouse own shares in my CPA professional corporation in Ontario?
No. CPA Ontario requires every shareholder to be a member of CPA Ontario or another professional corporation registered as a firm with CPA Ontario. Ontario gives family non-voting shares to physicians and dentists under a health-profession regulation, but there is no equivalent for accountants — family income-splitting through shares is not available in a CPA PC.
How long does CPA Ontario take to register a professional corporation?
CPA Ontario says firm registration and certificate of authorization applications are usually processed within three to five weeks of receipt. Applications go through My Portal. For a corporation intended to be active by December 31, CPA Ontario cautions that applications submitted after roughly mid-November may not be completed in time — file early in the fall.
What do I have to rename my accounting corporation to?
The corporate name must include the words "Professional Corporation" and comply with CPA Ontario's firm-name requirements. CPA Ontario offers name pre-approval through My Portal and recommends obtaining it before you incorporate, since a non-compliant name means paying for articles of amendment before registration can complete.
Do I incorporate first or register with CPA Ontario first?
Incorporate first — the OBCA corporation must exist before CPA Ontario can register it as a firm. But clear the name with CPA Ontario before filing articles: submit a firm-name pre-approval request via My Portal prior to incorporation, then file at the Ontario Business Registry, then complete firm registration (and the COA application if needed).
Incorporate your CPA professional corporation — free consultation
Two filings, one deadline-proof plan. In a free consultation, a Corporate Registry Services specialist maps both steps for your Ontario practice — the registry incorporation with regulator-compliant articles and naming, and the CPA Ontario registration that lets you practise through it — plus the annual renewals that keep both alive.
Related guides
Frequently asked questions
How much does a CPA professional corporation cost in Ontario?
Government and regulator fees total roughly $600 to start: $300 for articles of incorporation at the Ontario Business Registry, $180 + HST for professional corporation registration with CPA Ontario, plus a NUANS report. Add $123.81 + HST for a certificate of authorization if you practise public accounting. Ongoing: $260 + HST Annual Practitioner Due per CPA, due September 30.
Do I need a certificate of authorization from CPA Ontario?
Only if the corporation practises public accounting — audit, review and other regulated assurance engagements. At least one shareholder must then hold or apply for a public accounting licence. If the corporation only provides non-licensed accounting services, firm registration suffices; and a COA may not be needed where the corporation is merely a partner in another firm issuing statements under that firm's name.
Can my spouse own shares in my CPA professional corporation in Ontario?
No. CPA Ontario requires every shareholder to be a member of CPA Ontario or another professional corporation registered as a firm with CPA Ontario. Ontario gives family non-voting shares to physicians and dentists under a health-profession regulation, but there is no equivalent for accountants — family income-splitting through shares is not available in a CPA PC.
How long does CPA Ontario take to register a professional corporation?
CPA Ontario says firm registration and certificate of authorization applications are usually processed within three to five weeks of receipt. Applications go through My Portal. For a corporation intended to be active by December 31, CPA Ontario cautions that applications submitted after roughly mid-November may not be completed in time — file early in the fall.
What do I have to rename my accounting corporation to?
The corporate name must include the words "Professional Corporation" and comply with CPA Ontario's firm-name requirements. CPA Ontario offers name pre-approval through My Portal and recommends obtaining it before you incorporate, since a non-compliant name means paying for articles of amendment before registration can complete.
Do I incorporate first or register with CPA Ontario first?
Incorporate first — the OBCA corporation must exist before CPA Ontario can register it as a firm. But clear the name with CPA Ontario before filing articles: submit a firm-name pre-approval request via My Portal prior to incorporation, then file at the Ontario Business Registry, then complete firm registration (and the COA application if needed).
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