Bookkeeping for Dentists in Ontario: What Is Different and Why It Matters

Most bookkeepers treat a dental practice like any other small business, categorizing income and tracking expenses. However, dental practices have specific accounting requirements that a generalist bookkeeper simply does not know about.

HST and Dental Services: It Is Not Straightforward

Most dental services are HST exempt in Canada, which means you do not charge HST on basic dental procedures. Cosmetic procedures like teeth whitening are typically taxable. Mixed service offerings complicate HST calculations and restrict input tax credits. Getting this wrong means either collecting HST you should not be collecting, or missing input tax credits you are entitled to.

Associate Dentist Payments

Associate dentist compensation structure carries tax consequences. The classification as an employee (T4) or a subcontractor (T4A) affects payroll taxes, HST obligations, and liability. Misclassification is a common audit trigger, making correct classification essential from the start.

Dental Equipment and Capital Cost Allowance

Dental equipment investments require proper CCA categorization. Each category of equipment falls into a specific CCA class that determines how quickly you can depreciate it for tax purposes. Incorrect categorization results in either claiming insufficient depreciation or excessive amounts, triggering recapture upon sale.

Lab Fees and Supply Costs

Dental labs, supplies, and materials need to be categorized separately and correctly. These expenses significantly impact financial statements, tax returns, and industry benchmarking comparisons.

Professional Corporation Considerations

Ontario dentists typically practice through Professional Corporations with specific CRA rules around income splitting with family members, the small business deduction, and passive investment income. Dentistry PC rules differ from general corporation regulations.

What This Means Practically

Working with an inexperienced bookkeeper can mean leaving money on the table or carrying risk without knowing it.