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Dentist tax services: DPC T2s, exempt-supply HST, and equipment deductions done right
A dentistry professional corporation pays about 12.2% on its first $500,000 of practice profit in Ontario — but only if the T2, the GST/HST edges, and the owner-pay mix are handled deliberately. Most dental work is HST-exempt, which means the practice cannot recover the tax it pays on rent and equipment, while whitening and product sales sit on the taxable side. We manage the whole picture: DPC T2s, the exempt-taxable split, CCA on the operatory, and dividends that do not trip TOSI.
By the AnalytIQ Accounting team · Last reviewed: September 12, 2026
At a glance · dentists
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The DPC T2: a 12.2% rate worth protecting
A Dentistry Professional Corporation is a Canadian-controlled private corporation, so its first $500,000 of active practice income is taxed at roughly 12.2% in Ontario — the 9% federal small business rate plus 3.2% provincially. The T2 is due six months after year-end, with the balance owing three months after year-end for most DPCs claiming the small business deduction. We build the filing calendar around your production cycle so year-end work never competes with a full hygiene schedule.
The low rate is not automatic forever. Once investments inside the DPC earn more than $50,000 of passive income in a year, the federal small business limit shrinks by $5 for every extra dollar and disappears at $150,000. Ontario never adopted that grind, which changes the math on where retained earnings should sit. We track adjusted aggregate investment income with every T2 so a growing portfolio never quietly raises the rate on practice profit.
GST/HST in the operatory: exempt by default, taxable at the edges
Most dental services — exams, hygiene, restorations, extractions — are exempt supplies: you charge no GST/HST and claim no input tax credits, so the 13% HST on rent, supplies, and software is simply a cost of practising. The planning happens at the edges, where three categories behave differently:
- Purely cosmetic work is taxable. Whitening and other procedures with no medical or reconstructive purpose sit outside the health care exemption.
- Front-desk retail is taxable. Electric toothbrushes and whitening kits count toward the $30,000 small-supplier threshold measured over four calendar quarters; cross it and the practice must register and charge 13% on those sales only.
- Orthodontics has its own logic. Orthodontic appliances are zero-rated, and a long-standing CRA administrative arrangement lets qualifying practices treat part of each case fee as an appliance supply and recover ITCs — but only when billing and records are structured for it from the start.
| What the practice sells | GST/HST treatment |
|---|---|
| Exams, hygiene, fillings, extractions | Exempt — no HST charged, no input tax credits on related costs |
| Whitening and purely cosmetic procedures | Taxable — counts toward the $30,000 registration threshold |
| Retail products at the front desk | Taxable at 13% in Ontario once the practice is registered |
| Orthodontic appliances and artificial teeth | Zero-rated — 0% charged, ITCs available on related inputs |
Equipment: CCA on the rules that actually apply now
Chairs, sterilizers, panoramic and CBCT units, and CAD/CAM mills are Class 8 property at 20% declining balance; computers fall into Class 50 at 55%; leasehold build-outs amortize in Class 13 over the lease term. The $1.5 million immediate expensing window closed for property available for use after 2023, so we plan around the regular classes — while the accelerated investment incentive still suspends the half-year rule for eligible equipment available for use before 2028, doubling the usual first-year claim.
One dentist-specific wrinkle: because an exempt practice recovers no HST, the 13% paid on a new operatory becomes part of the capital cost and depreciates with it. And CCA requires the asset to be available for use, so when a major purchase is coming either way, a December install beats a January one.
Owner pay: salary, dividends, and the family-share trap
Most dentists land on a mix. Salary is deductible to the DPC, creates RRSP room, and builds CPP; dividends avoid payroll remittances and can be timed against slower years. Dentistry is one of only two Ontario professions whose corporations may issue non-voting shares to family members — but TOSI taxes most family dividends at the top personal rate unless an exclusion applies, chiefly a spouse once you are 65 or a family member genuinely working around 20 hours a week in the practice. We stress-test the mix with every T2 rather than setting it once at incorporation.
Instalments today, a practice sale tomorrow
Once corporate tax passes $3,000, instalments start the following year — monthly, or quarterly for small CCPCs with a clean compliance record. We reset the schedule after each T2 so an associate buy-in or a fee-guide increase never leaves you underpaid and quietly accruing interest.
Most dentists also want the endgame protected: the lifetime capital gains exemption, now $1.25 million, only applies if DPC shares meet the QSBC purity tests, and retained investments are the usual spoiler — purification is a years-ahead project. If your training or savings history runs through the US — a 401(k) from residency, licensure after a US DDS — the Canadian file needs to line up with the American one; that side lives on our cross-border tax page for dentists.
Source: CRA — GST/HST for businesses.
What we take off your plate
Tax services for dentists, handled.
- DPC T2 with the exempt-taxable HST split done right
- Salary-dividend mix that keeps family shares onside with TOSI
- T2 and owner T1s filed together, deadlines tracked
- GST/HST returns and instalments handled
- CRA letters and reviews answered for you
- Salary-versus-dividend plan reviewed every year
Mistakes we fix
Three things that go wrong for dentists.
- Charging no HST on whitening and retail products, which are taxable even inside an exempt practice
- Paying a spouse dividends that fail the TOSI excluded-share test
- Skipping CCA on the operatory build-out because the practice is HST-exempt
Recognise one? Book a call and we will tell you what it is costing you.
Services for dentists
Six services, one team that knows how dentists run.
Start with one. Add the rest when it makes sense; the books, payroll and tax already talk to each other.
Free proposal
A fixed fee for your tax work, in writing.
- Tell us about your business. The form takes about a minute.
- A short discovery call. Fifteen minutes to confirm what you need.
- A fixed fee in writing. We reply within one business day. No hourly surprises.
- Canadian and US filings under one roof
- Cloud-first: QuickBooks Online, Dext, Wagepoint
- Brampton, Ontario, with clients across Canada and the US
Related answers
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Common questions.
Does a dental practice need to register for GST/HST?
Usually not, because most dental services are exempt and exempt revenue does not count toward the $30,000 small-supplier threshold. Registration becomes mandatory only if taxable sales — whitening, retail products — pass $30,000 over four calendar quarters.
Can the DPC still write off equipment immediately?
The $1.5 million immediate expensing measure expired for equipment available for use after 2023. Most operatory equipment now goes into Class 8 at 20% declining balance, with the half-year rule suspended for eligible purchases available for use before 2028.
Can my spouse hold shares of the DPC?
Ontario lets family members hold non-voting shares of a dentistry professional corporation, but TOSI taxes most dividends paid to them at the top personal rate. The main exceptions are a spouse once you are 65 and a family member averaging about 20 hours a week in the practice.
Related reading
Tax filings that respect chair time.
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