GST/HST for Dental Practices: What’s Taxable in Canada

You don’t charge GST/HST on most dental services, but understanding which services are exempt and which are taxable can help you avoid costly CRA audits and compliance issues.

For Canadian dentists, GST/HST rules are not always straightforward. While most clinical services are exempt, certain procedures and products fall outside this category. Misclassification can lead to reassessments, penalties, and missed input tax credit (ITC) opportunities.

Understanding Exempt Dental Services

Most dental services are exempt from GST/HST under the Excise Tax Act, meaning no tax is charged to patients on treatment.

These exemptions generally cover diagnostic and preventive care, such as exams, X-rays, and cleanings, along with restorative procedures including fillings, crowns, and bridges. Periodontal treatments, endodontic procedures, oral surgery, and prosthodontic services performed for health-related purposes are also considered exempt.

What Dental Services are Taxable?

The distinction between exempt and taxable services depends on whether the procedure addresses a health concern or is performed for cosmetic purposes.

Cosmetic procedures such as teeth whitening or veneers provided strictly to improve appearance are taxable. The Canada Revenue Agency considers a procedure cosmetic when it does not treat disease, injury, or dysfunction. However, procedures with a medical or reconstructive purpose may still qualify as exempt.

Retail products sold directly to patients — including whitening kits, toothbrushes, and other oral care items — are also taxable. Applicable tax rates vary by province, ranging from 5% GST in Alberta to 13–15% HST in provinces such as Ontario and those in Atlantic Canada.

The Zero-Rated Category: Orthodontic Appliances

Orthodontic appliances are “zero-rated” — taxed at 0% GST/HST. A 2024 Federal Court of Appeal decision confirmed this classification.

With zero-rated supplies, you don’t charge patients tax — but unlike exempt services, you can claim input tax credits (ITCs) for GST/HST paid on related expenses. Lab services for certain dental appliances also qualify as zero-rated.

The tax treatment of other dental prosthetics remains less clear. Recent court cases suggest artificial teeth, crowns, and bridges may be considered part of a single exempt supply depending on how they’re provided.

Do You Need to Register for GST/HST?

Registration is required if your taxable and zero-rated supplies exceed $30,000 annually.

This threshold includes revenue generated from cosmetic procedures, retail product sales, orthodontic appliances, and other non-exempt services. Even though orthodontic appliances are zero-rated, they still count toward the registration requirement.

Many dental practices remain below this threshold due to the predominance of exempt services. Where a practice provides only exempt services, voluntary registration generally offers no advantage, as ITCs cannot be claimed.

Input Tax Credits: What You Can Claim

Because most dental services are exempt, GST/HST paid on practice expenses is typically a non-recoverable cost.

However, ITCs may be available for expenses related to taxable cosmetic services and zero-rated orthodontic appliances. If your practice is registered, ITCs can be claimed on direct expenses tied to these activities, as well as on a reasonable allocation of general overhead costs such as rent and utilities.

For capital assets, equipment may qualify for ITCs when it is used primarily in commercial activities. In the case of real property, such as a building, ITCs may be claimed proportionately where commercial use exceeds 10%.

Important 2025 Changes for Orthodontic Practices

The CRA eliminated the 35% orthodontic ITC estimation method for fiscal years beginning on or after January 1, 2025. This arrangement, in place since 1991, previously allowed dentists to estimate that up to 35% of orthodontic treatment fees represented the zero-rated appliance component.

You must now calculate actual ITCs based on precise allocation between commercial activities and exempt services throughout the year. This requires detailed record-keeping and a fair, reasonable apportionment method applied consistently.

The good news: Some practices may actually recover more than the old 35% estimate. The Federal Court of Appeal confirmed that orthodontic appliances are separate zero-rated supplies, and registrants have four years to claim ITCs retroactively.

If you provide orthodontic services, implement tracking systems now to capture actual usage of inputs. Work with a dental-specialized accountant to establish documentation that supports your ITC claims — the CRA denies inadequately supported claims even when legitimately entitled.

Provincial Tax Variations

Your location affects rates on taxable supplies. HST provinces (Ontario, Atlantic Canada) charge 13-15%. GST + PST provinces (BC, Saskatchewan, Manitoba) charge 5% federal plus provincial. Quebec charges 5% GST plus 9.975% QST. Alberta and territories charge 5% GST only

Avoiding Common Mistakes

Many dentists incorrectly classify cosmetic procedures as exempt. Document medical necessity for treatments addressing functional issues.

Failing to charge GST/HST on retail products is another common error. Some practices miss ITC opportunities on orthodontic appliances by treating them as exempt rather than zero-rated.

Inadequate record-keeping creates CRA review problems. If claiming ITCs based on apportionment, maintain detailed records showing your calculations. The CRA denies ITC claims lacking documentation.

Your Compliance Strategy

Understanding GST/HST rules protects you from unexpected assessments and maximizes financial efficiency. While most services remain exempt, properly identifying taxable and zero-rated supplies ensures compliance.

The distinction matters: exempt services mean no tax charged and no ITCs available; zero-rated supplies mean no tax charged but ITCs can be claimed; taxable services mean you charge GST/HST and claim ITCs.

Work with a dental-specialized accountant to establish proper GST/HST procedures. The classification nuances, apportionment rules, and documentation requirements need expertise in both dental operations and Canadian tax law.

Get Expert GST/HST Guidance for Your Dental Practice

Is your practice handling GST/HST correctly? The recent regulatory changes and complex apportionment rules demand specialized expertise that generic accountants don’t have.

Dental Tax works exclusively with Canadian dental practices. We understand whether orthodontic appliances qualify as zero-rated, how to document cosmetic versus health services, and which expenses qualify for ITCs in your practice.

Don’t leave money on the table or risk CRA penalties. Schedule a consultation with Dental Tax today to review your GST/HST position, identify recovery opportunities, and implement compliant systems that maximize your financial position.