If your clinic earns exempt treatment income and taxable income at the same time, you run a mixed practice. The rules apply to each stream on its own: you never charge HST on exempt treatment, you charge it on the taxable side once registered, and only the taxable side counts toward the $30,000 registration threshold. The hard part is bookkeeping that keeps the two apart all year.
Most clinicians assume they are either exempt or taxable, full stop. In reality, a large share of clinics earn both kinds of income under one roof, and the tax treatment does not blend. Each dollar keeps its own character, and your books have to know which is which.
How a clinic ends up with mixed income
Exempt status attaches to the service, not to you. A physiotherapist, chiropractor, psychologist, or naturopath provides exempt care when treating patients, but plenty of what happens in the same clinic falls outside that protection:
- Products sold to patients: supplements, dispensary items, braces, supports, and other clinic retail. Some medical devices have their own special rules, but the default for products is taxable.
- Third-party work: medico-legal reports, insurance assessments, and expert opinions are generally taxable even when an exempt practitioner writes them, because they are not treatment.
- Non-clinical income: workshops, courses, corporate wellness contracts, and public speaking.
- A second, taxable discipline: an acupuncturist who is also an RMT charges HST on massage appointments once registered, while acupuncture stays exempt.
Treating patients
Health care services provided to your patients for health purposes. No HST charged, no matter how large the practice grows.
Everything around the treatment
Products, medico-legal and insurance work, courses, and any service that is not patient care. This side can trigger registration.
The $30,000 threshold only looks at your taxable side
The small-supplier threshold is measured on taxable sales over four consecutive calendar quarters, a rolling window rather than your fiscal year. Exempt treatment income never counts, no matter how much of it you earn.
That cuts both ways. A busy physio clinic billing $400,000 in exempt treatment with $8,000 of product sales has no obligation to register. A modest practice selling $35,000 of supplements and assessment reports crossed the line months ago and may already owe tax it never collected. The threshold question is always about the taxable slice, and clinics that never total that slice separately are the ones who find out late.
What changes once you register
Registration does not make your treatment taxable. You start charging HST on the taxable stream only, and your exempt services carry on exactly as before.
The recovery side follows the same split. You can claim back the HST you pay on costs tied to your taxable activity, such as the inventory you buy to resell. Costs tied to exempt care give you nothing back. Shared costs, like rent and clinic software, have to be divided between the two on a basis you can defend, and a sloppy split is one of the easiest things for CRA to challenge in a review.
Where mixed practices actually go wrong
The rules above are manageable. The failures we see are almost always in the books:
- All income lands in one bucket, so nobody knows whether the taxable side crossed $30,000 until well after it did.
- HST is charged on everything after registration, including exempt treatment, which overcharges patients and creates a mess to unwind.
- Tax paid on expenses is claimed back in full instead of being apportioned, which quietly builds an audit liability.
The fix is structural, not heroic: separate income accounts for exempt and taxable streams, a running total on the taxable side, and a documented method for splitting shared costs. Set up once, it runs itself.
FAQ
Does my exempt treatment income ever count toward the $30,000?
No. The threshold is measured on taxable sales only. Exempt health care services are excluded from the count entirely.
I registered for HST. Do I have to charge it on treatment now?
No. Registration changes nothing about exempt services. You charge HST on the taxable stream and continue billing treatment without tax.
Is a report for an insurance company really taxable if I am an exempt practitioner?
Generally yes. Work done for a third party rather than for the patient’s care, such as insurance assessments and medico-legal reports, usually falls outside the exemption. It belongs on the taxable side of your books.
Not sure which of your income streams sit on which side of the line? Tell us what your clinic earns and we will map it out for you.