Every regulated health professional in Ontario can incorporate. You set up a health professional corporation under the Business Corporations Act, then your college issues a certificate of authorization that lets it practise. Deciding if you should is a different question, and it mostly comes down to money you don’t need to live on. Profit left in the corporation is taxed at roughly 12 percent instead of your personal rate. If you spend everything you bill, incorporation adds cost and paperwork and saves you very little.
“Professional corporation” gets treated like a physicians-only club, but it isn’t. Here’s who actually qualifies and the honest math on when it’s worth doing.
Who can incorporate
In Ontario, every profession regulated under the Regulated Health Professions Act can form a health profession corporation. That covers physiotherapists, chiropractors, massage therapists, psychologists, dietitians, naturopathic doctors, occupational therapists, speech-language pathologists, and the rest of the college-regulated professions. The structure has two parts: the corporation is created provincially, and then your college issues a certificate of authorization that permits it to practise. Without that certificate the corporation exists but can’t treat a single patient, and the certificate has to be renewed with your college every year.
The corporation is on a short leash. It can only practise your profession and activities related to it, so you can’t run an unrelated side business through it. All of its shares must be held by members of your own college. The name has to follow your college’s format and include the words “Professional Corporation”, and it can’t be a numbered company.
The family shareholder rule almost everyone gets wrong
Physicians and dentists are the exception: Ontario lets their family members hold non-voting shares. Every other health profession gets no family shares at all. Your spouse can’t own a piece of your physio corporation unless they’re also a registered physiotherapist.
Here’s the trap, even for doctors: since 2018, the federal tax on split income rules tax dividends paid to family members at the top personal rate unless that person genuinely works in the practice, roughly 20 hours a week, or another narrow exception applies. The family-shares headline is worth much less than it sounds. If income splitting is the only reason you want to incorporate, you probably shouldn’t.
What incorporation actually saves
The real benefit is deferral. Active practice income left inside the corporation is taxed at Ontario’s small business rate of roughly 12 percent on the first $500,000, while the same dollar taken personally can lose more than 53 percent at the top bracket. That gap is money that keeps working: it can grow as an investment portfolio inside the corporation or fund equipment and the slow months.
Note the word deferral. The tax isn’t gone, it’s postponed until you pay yourself, which is why how you pay yourself becomes a live planning question the day you incorporate.
You bill more than you spend
Consistent profit beyond your living costs and a horizon of several years, so real money stays in the corporation and the deferral has time to compound.
You draw out every dollar
If all your billings fund your life, the corporate rate never helps you. You’d pay accounting and legal costs every year for a structure that saves next to nothing.
What it doesn’t do
A professional corporation doesn’t protect you from malpractice claims. You stay personally liable for your own professional negligence, which is what your insurance is for. The corporation shields you from business debts like a lease or an equipment loan, not from your clinical work.
It also changes nothing about HST.
Exempt services stay exempt and taxable ones stay taxable. A massage therapy corporation still charges HST once it crosses the $30,000 threshold, exactly like a sole-proprietor RMT, and an incorporated physio still can’t claim input tax credits on exempt treatment income. We covered the broader decision in should health practitioners incorporate; the rules in this post are the college-specific layer on top.
Common questions
How much does it cost to run?
Plan on legal and incorporation costs up front plus the college’s application fee, then a corporate tax return and a certificate renewal every year on top of proper bookkeeping. For most practices that lands in the low thousands annually, which is why the deferral has to be real before it’s worth it.
I practise in more than one province. Does an Ontario corporation cover me?
Not automatically. Professional corporation rules are provincial and each regulator runs its own regime, so a practice that spans provinces needs specific advice before assuming one certificate travels.
Can two practitioners share one corporation?
Members of the same college can, and group physiotherapy or chiropractic corporations are common. Mixing professions in one professional corporation is where it breaks down, since the shareholders generally have to belong to the same college.
Thinking about incorporating your practice and want the math run on your real numbers first? Send us a note and we’ll tell you straight whether it’s worth it.