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Corporate

Can I incorporate my professional practice in Ontario?

TSL Written by the Treadstone Law team· Updated June 2026

Many professionals in Ontario can incorporate, but under specific rules set by their governing bodies rather than the general Business Corporations Act. Professional corporations are a special category.

For example, lawyers can incorporate under the Law Society Act through a Law Corporation; accountants can form professional corporations under the CPA Ontario rules; physicians and other regulated health professionals have their own incorporating provisions. Each governing body sets restrictions on who can own shares (often limited to members of the profession or their spouses and family members under defined circumstances), what the shares can be, and what activities the corporation can carry on.

The tax benefits of incorporating — particularly the small business deduction and tax deferral — are available to most professional corporations on their active professional income, which is why many established professionals do incorporate. However, the liability protection is more limited for professionals. A professional corporation does not protect a professional from personal liability for their own professional negligence — that remains personal. What the corporation may protect is exposure to certain business debts and obligations that are not professional services liabilities.

Before incorporating your practice, verify the specific rules with your governing body and consult a lawyer familiar with professional corporations in your field.

Key takeaways

  • Many Ontario professionals can incorporate under their profession's specific rules.
  • Share ownership is typically restricted to members of the profession or defined family members.
  • The small business deduction and tax deferral are available on qualifying professional income.
  • A professional corporation does not shield a professional from personal liability for their own negligence.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone corporate lawyer can help.
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