Incorporating a therapy practice in Ontario: your college decides what is possible

Your regulator decides first; the tax math comes second

Ontario's regulated health professionals may only practise through a corporation if it is a health profession corporation holding a certificate of authorization from their own college. Not every college can issue one, though. That single fact sorts the therapy world into different lanes before an accountant has anything to add.

We treat that last row seriously. The therapy professions have asked for broader incorporation rights for years, and a clinician who checked the rules in 2021 may be planning on stale information today.

How the psychologist route works

A health profession corporation is an ordinary Ontario corporation dressed to its college's code. The name must include the words Professional Corporation and follow college naming rules. Every share must be held by a member of the same college, and the certificate of authorization has to be kept current. There is no room for a spouse or family trust on the share register. The family shareholding exception in Ontario applies only to physicians and dentists, not to psychologists. The sequence is incorporate first, then apply. The college issues its certificate to an existing corporation, and billing through the company before the certificate is in hand invites a professional-conduct problem. Budget for the college's application and renewal fees alongside the corporate filings when weighing the numbers.

Know what the structure does not do. Professional liability stays personal no matter what the letterhead says; your insurance obligations do not move. What the corporation shields is the business layer — the office lease, equipment, supplier accounts. What it enables is tax deferral: clinical profit you do not draw out is taxed at roughly 12.2% instead of personal rates that can pass 50%.

The group-practice corporation: the route open to almost everyone

A clinician who cannot form a professional corporation can use an ordinary corporation for the business of a clinic. This includes the lease, admin and billing staff, the booking platform, marketing, and contracts with associate clinicians. Revenue earned on the work of associates, room rental to other practitioners, and workshops or courses can live in that corporation even where your own clinical fees cannot. Where exactly your college draws the line on holding out and fee handling is the question to ask it directly. Paper the arrangement properly: the corporation holds the lease and the contracts, associate splits are written down, and fee flows match the agreements. Informal setups are where both college complaints and CRA questions begin.

This is where most practice owners without professional-corporation access land. It is honest to say who it does not help, though: a solo psychotherapist with no associates and no non-clinical revenue has little to put in a corporation. She usually should not pay to maintain one.

The tax math, honestly, for a clinical practice

Incorporation pays only through retained earnings. Therapy practices are lifestyle businesses more often than accumulation businesses, though. A clinician who draws every dollar ends up roughly where integration rules intend, minus the cost of a T2 return and corporate records. The structure earns its keep for high-billing psychologists saving inside the corporation and for group practices with real associate margins.

One recent wrinkle helps either way: psychotherapy and counselling therapy services became GST/HST-exempt in June 2024. A practice whose only revenue is therapy may not need a GST/HST account at all. Workshop and course revenue can still be taxable, though, once it passes the $30,000 threshold, so mixed practices still need the analysis. And if your couch is virtual and some clients sit in the US, the sourcing and paperwork questions live on our cross-border tax page for therapists.