What Is the HST Registration Threshold in Ontario?

The Short Answer

The HST registration threshold — the line between “small supplier” (no registration required) and “registrant” (must charge and remit HST) — is $30,000 in taxable supplies over any four consecutive calendar quarters. For Ontario wellness clinics, the critical point is that HST-exempt services do not count toward this threshold. Only taxable revenue (typically product sales and room rentals) matters.

A chiropractor earning $300,000 per year entirely from chiropractic adjustments has zero taxable supplies and never needs to register. The same chiropractor selling $35,000 of orthotics and supplements annually must register.

The Full Explanation

The $30,000 Small Supplier Threshold

Under the Excise Tax Act, a business is a “small supplier” and exempt from mandatory HST registration if its total taxable supplies do not exceed $30,000 over four consecutive calendar quarters. Once taxable supplies exceed this amount over any rolling four-quarter period, the business is no longer a small supplier and must register.

For individuals (sole proprietors), the threshold is measured on your personal business revenue. For corporations, it is measured at the corporation level.

What Counts — and What Doesn’t

Counts toward the threshold:

• Product sales (supplements, orthotics, massage oils, equipment)
• Room rentals to other practitioners
• Non-regulated services (wellness coaching, esthetic services by unregistered staff)
• Any other taxable supply your business makes

Does NOT count toward the threshold:

• HST-exempt professional services (chiropractic, physiotherapy, acupuncture/TCM, and naturopathic services — when provided by registered practitioners)
• Zero-rated supplies (certain medical devices, exports)

Important exception — RMT services are taxable, not exempt: Registered massage therapy services are subject to 13% HST. Unlike the other four regulated practice types above, massage therapy is not listed in Schedule V, Part II of the Excise Tax Act. All RMT service revenue therefore counts toward the $30,000 threshold. A full-time RMT earning $80,000 per year in treatment fees will cross the threshold and must register for HST.

This distinction is critical for wellness clinics. A naturopathic doctor with $200,000 in professional fees (exempt) and $25,000 in supplement sales (taxable) is a small supplier — because only the $25,000 counts. At $31,000 in supplement sales, registration is required.

When Registration Is Triggered — The Timing Rules

Two scenarios can trigger mandatory registration:

Exceeding $30,000 in a single calendar quarter: If your taxable supplies exceed $30,000 in any single quarter, you must register within 29 days of the day you exceeded the threshold.

Exceeding $30,000 over four consecutive quarters: If your taxable supplies over any rolling four-quarter period exceed $30,000, you must register within 29 days of the end of the quarter in which you crossed the threshold.

Once you register, you must charge HST on all taxable supplies going forward. You do not retroactively charge HST on supplies made before you hit the threshold.

After Registration — What Changes for a Wellness Clinic

Once registered:

1. Charge HST on taxable supplies — 13% on all taxable products and services you sell
2. Continue not charging HST on exempt services — registration doesn’t make your exempt services taxable
3. File HST returns — quarterly is common for most registrants; annually is available for small businesses
4. Claim input tax credits (ITCs) — on expenses reasonably related to your taxable supplies
5. Keep records — supporting documentation for all HST collected and ITCs claimed

For a wellness clinic with mixed exempt/taxable revenue, this means separate revenue tracking, expense allocation, and quarterly reporting — a meaningful administrative increase.

Should You Voluntarily Register Below the Threshold?

Voluntary HST registration is permitted below the $30,000 threshold, but it rarely benefits wellness clinics with primarily exempt income.

Here is why: You can only claim ITCs on expenses related to taxable activities. If 90% of your revenue is exempt chiropractic services and 10% is taxable product sales, you can only claim ITCs on the 10% of expenses related to those product sales. Voluntary registration doesn’t unlock ITCs on your exempt service expenses.

The only scenario where voluntary registration might help a wellness clinic is if:

• You have significant taxable expenses (e.g., you are building out a retail operation) that generate meaningful ITC refunds
• Your taxable revenue is growing rapidly toward the threshold and you want to simplify by registering early

For most solo practitioners with minimal product revenue, voluntary registration adds administrative burden without meaningful benefit.

What This Means for Your Clinic

The key action item: track your taxable revenue separately from your exempt revenue, and monitor it against the $30,000 threshold. If you sell supplements, orthotics, or other products, you need a running total of those sales — not just your overall revenue.

Crossing the threshold without registering creates a retroactive HST liability. The CRA can assess unremitted HST on taxable supplies you should have been charging since the date you became a registrant, plus interest and penalties.

Wellspring Accounting monitors HST thresholds for all clients with mixed revenue streams. See our naturopathic accounting services in Toronto for an example of how we manage this, or read our complete HST guide for Ontario wellness clinics.