HST on med spa clinics in Ontario: what owners get wrong, and how to stay audit proof

A med spa sells two very different things out of the same treatment room. Some of what you do is regulated health care. Most of what pays the rent is elective cosmetic work. GST/HST treats those two categories completely differently, and the line between them is drawn by the purpose of the treatment, not by the credentials of the person holding the syringe.

That is the point most Ontario clinics get wrong, and it is the reason medical aesthetics attracts more CRA attention than almost any other service business its size.

The rule that decides everything

Cosmetic is taxable. Medical is exempt.

Under the Excise Tax Act, a cosmetic service supplied for purely cosmetic purposes, and anything supplied in respect of that service, is deemed not to be a health care service. In Ontario it carries 13% HST. It makes no difference whether the provider is an MD, an NP or an RN. A licence gives you the authority to perform a controlled act. It does not create a tax exemption.

Services you must charge 13% on

• Injectables performed for appearance: neuromodulators for wrinkles, dermal fillers, jawline and chin shaping, collagen stimulators, deoxycholic acid for cosmetic fat reduction
• Laser and energy treatments performed for appearance: hair removal, IPL and photofacials, RF microneedling, skin tightening, elective tattoo removal
• Retail sales of medical grade skincare, sunscreen, serums and supplements
• Nursing, consultation and assessment work supplied in respect of a taxable cosmetic procedure, which follows the tax status of the procedure it supports

Services that are genuinely exempt

Two conditions have to hold at the same time. A regulated professional performs or supervises the service, and the service is provided for a real medical purpose, meaning the diagnosis or treatment of a condition, or the correction of a significant defect arising from disease, trauma or congenital deformity.

In practice that covers botulinum toxin administered for documented chronic migraine, hyperhidrosis or a diagnosed TMJ disorder. It covers treatment of severe acne or rosacea, examination of a suspicious lesion, and a physician or NP consultation where the point of the visit is diagnosis rather than aesthetics.

If you are working through your treatment menu and want a starting point on where each service is likely to sit, our HST exempt or taxable lookup covers the common ones.

Registration, and why late registration hurts

Once taxable sales cross $30,000 over four consecutive calendar quarters, GST/HST registration is mandatory. Note the word taxable. Exempt medical billings do not count toward it, which is exactly why solo injectors miscount and register late.

Registering late does not wipe the slate. You owe 13% on taxable sales made from the point you stopped being a small supplier, whether or not you ever charged a client. That amount comes out of margin you have already spent.

Where clinics actually get caught

Treating the practitioner as the test. The CRA reads past the title on the lab coat and looks at the clinical rationale in the chart.

Cosmetic neuromodulator billed as exempt. This is the most common single trigger. Most neuromodulator volume in a med spa is cosmetic, and without documentation supporting a diagnosis it will be assessed as cosmetic.

POS mapping. Booking platforms are built to fill a schedule, not to run split-tax accounting. Revenue lands in one "Sales" bucket, service codes are never mapped to a tax status, and the general ledger inherits the error every month.

Packages, memberships and gift cards. Gift cards carry no HST on sale, only on redemption. Packages are taxed according to the mix of services inside them. Memberships are taxable where the benefits are cosmetic. Very few systems handle this without being configured for it.

No documentation behind an exempt claim. If you claim exemption, the CRA expects chart notes, a diagnosis, a treatment plan, relevant history and evidence of medical necessity. Without those, the service is taxable retroactively.

Setting it up so it holds

Map every service. Go line by line through the menu and record, for each one, whether it is taxable, whether it could ever be exempt, and what documentation would be required for that. That sheet becomes your internal reference and your audit defence.

Build a chart of accounts that separates the revenue. Cosmetic injectables, exempt medical, taxable laser and retail product should each have their own account. Gift card and package balances belong in a liability account until they are redeemed. Injectable and retail cost of goods should sit apart from general overhead.

Fix the flow from POS to books. Export the detailed sales report, validate each line item against your mapping, then post it to the accounting file and reconcile to bank deposits. When the POS, the bank and the books agree, you have something to hand an auditor. Our bookkeeping and HST work is built around that monthly reconciliation.

Keep input tax credits defensible. Every ITC needs a source invoice you can produce. Digitised receipts and a monthly summary of the taxable versus exempt revenue split will answer most of what a review asks for.

Check the intercompany arrangement. If you run an MSO or professional corporation structure, the management fee has to match the services actually described in the management services agreement, with HST applied correctly. The CRA's policy on payments within a medical practice organisation is where this gets tested, and a vague or arbitrary fee is the part that gets disallowed. The corporate tax side of that structure is worth reviewing at the same time.

What the exposure really is

An assessment in this sector is rarely one bad quarter. The CRA reopens several years, reclassifies the cosmetic revenue that was treated as exempt, and adds interest and penalties on tax you never collected from the client. There is no one to bill it back to.

Clinics that get this right do not spend less time on compliance. They spend it once, at setup, instead of reconstructing three years of records under deadline. If you want an outside read on how your current setup would hold up, that is the kind of review we run for med spas and cosmetic clinics.

All of our med spas and cosmetic clinics work

General information only, current at August 2026. Tax rules change and GST/HST status is fact-specific. Confirm your own position before relying on anything here.