Professional Corporations in Ontario: A Legal Guide for Doctors, Lawyers, and Accountants

If you’re a professional in Ontario — such as a doctor, dentist, lawyer, or accountant — you’ve likely heard about the benefits of incorporating your practice. A Professional Corporation (PC) can offer valuable tax advantages, greater flexibility, and a more structured way to manage your business. However, it also comes with specific legal requirements and professional regulations that set it apart from a standard corporation.

Understanding how professional corporations work can help you decide whether this structure is the right move for your career or practice.

What Is a Professional Corporation?

A Professional Corporation is a special type of corporation that allows licensed professionals to run their practice through a corporate structure while continuing to follow their profession’s governing rules.

In Ontario, only certain regulated ptrofessionals can incorporate, including:

• Doctors and dentists
• Lawyers and paralegals
• Accountants
• Engineers and architects
• Veterinarians
• Social workers

While a professional corporation can earn income, own property, and enter contracts like any other business, it must also comply with the rules of its regulatory body. For example, doctors follow the College of Physicians and Surgeons of Ontario, and lawyers follow the Law Society of Ontario.

Key Legal Requirements

Professional corporations are governed by the Ontario Business Corporations Act (OBCA) and the specific regulations of each profession. Below are the most important requirements to keep in mind.

1. Ownership Restrictions

Only licensed members of the same profession can hold voting shares in a professional corporation.

For example:

• A medical professional corporation can issue voting shares only to licensed doctors.
• Some professions allow family members to hold non-voting shares, but this depends on the regulatory body’s rules.

2. Naming Requirements

Your professional corporation’s name must:

• Include your name (for example, Dr. Jane Smith Medicine Professional Corporation)
• Include the words “Professional Corporation”
• Be approved by your profession’s regulatory body before incorporation

3. Liability Limitations

While incorporation protects against certain business debts and contractual obligations, it does not protect against professional negligence or misconduct. You are still personally responsible for your professional actions, even if your practice is incorporated.

4. Corporate Governance

A professional corporation must maintain proper corporate records, including:

• A minute book with bylaws, resolutions, and share certificates
• Annual filings with the Ontario Business Registry
• Compliance with both tax and professional regulations

Regular maintenance is essential to keep your corporation in good standing.

Tax Advantages of a Professional Corporation

One of the main reasons professionals choose to incorporate is the potential for significant tax savings and financial flexibility.

1. Tax Deferral

Income earned inside the corporation is taxed at a lower corporate rate than personal income. This means you can leave earnings in the corporation and defer paying personal tax until the funds are withdrawn later.

2. Limited Income Splitting

Although the federal government has limited income splitting, there are still some opportunities. For instance, family members who hold non-voting shares and contribute meaningfully to the business may receive dividends.

3. Lifetime Capital Gains Exemption (LCGE)

If you sell your corporation’s qualifying shares in the future, you may be eligible for the Lifetime Capital Gains Exemption, which can exempt up to $1 million in gains from tax (subject to CRA conditions).

4. Retained Earnings and Investment Growth

Retaining funds within your corporation allows you to reinvest or build long-term savings at a lower tax rate. Many professionals use their PC to accumulate wealth for retirement or future expansion.

Disadvantages and Limitations

While incorporating your practice offers clear benefits, it isn’t the right choice for everyone. Some potential drawbacks include:

• Higher setup and annual maintenance costs for legal, accounting, and filing services
• Limited liability protection, since professional negligence is not covered
• More administrative work, including corporate records and annual returns
• Complex tax planning requirements when managing retained earnings or dividends

Before incorporating, it’s important to weigh these costs against the potential savings and strategic benefits.

When Should You Incorporate Your Practice?

Incorporation makes the most sense when your practice is earning more than you need for personal expenses or when you’re planning for long-term growth.

It may be the right time to incorporate if:

• You plan to retain earnings for reinvestment or future savings
• You’re expanding your practice or bringing on partners
• You want to prepare for succession or estate planning
• You’re looking for better control over how and when income is taxed

A professional accountant or business lawyer can help assess your situation, income level, and goals to determine when incorporation is the best option.

How DiMinno Rizzi Lawyers Can Help

At DiMinno Rizzi Lawyers, we help Ontario professionals incorporate and manage their practices with confidence. Our corporate lawyers handle every stage of the process, ensuring your professional corporation is properly structured and compliant.

Our services include:

• Drafting and filing incorporation documents
• Structuring share ownership according to professional rules
• Coordinating approvals with regulatory bodies
• Maintaining your corporate minute book and annual records
• Preparing shareholder agreements and business succession plans

We also work closely with accountants and financial advisors to align your tax and legal strategies for maximum efficiency.

Final Thoughts

A Professional Corporation can provide significant tax advantages, flexibility, and long-term stability for doctors, lawyers, accountants, and other professionals in Ontario. However, it’s not a decision to make lightly.

Each profession has its own regulations, and every individual’s financial situation is unique. Before incorporating, it’s best to consult with a lawyer and accountant who understand your professional obligations and goals.

If you’re considering incorporation or need guidance on managing your existing professional corporation, contact DiMinno Rizzi Lawyers for a free consultation. We’ll help you structure your practice for success, compliance, and peace of mind.re to ensure your rights — and your property — are fully protected.