What professions in Ontario are allowed to incorporate as a professional corporation?

Ontario's Business Corporations Act includes a professional-corporation regime that many regulated professions use, but whether a specific profession can incorporate — and on what conditions — is set by that profession's own governing legislation and regulatory college, not a single universal list. In practice, professional corporations are commonly used by lawyers, physicians, dentists, chiropractors, other regulated health professions, and public accountants, among others whose governing body has adopted rules permitting it.

Because the enabling rules sit with each governing body, the details differ: who may hold shares, whether a certificate of authorization is required before the corporation can practise, and what the corporation's name must include can all vary by profession. A profession not mentioned here may still be eligible, or may have restrictions that make incorporation impractical. If you're a licensed professional considering incorporating, the first step is confirming with your own regulatory college that professional corporations are permitted for your profession and what its specific requirements are, before instructing a lawyer to prepare the incorporation and any related shareholder documents.