Orthodontist payroll: commissions, multi-office staff, and paying yourself from the DPC

Four kinds of pay in one small office

A typical orthodontic practice runs payroll for clinical assistants and front-desk staff, pays a treatment coordinator whose compensation often includes a commission component, occasionally engages an associate orthodontist to cover a second chair or a satellite office, and pays the practice owner from the DPC by salary, dividends, or both. Each of those four gets a different slip, a different remittance treatment, and — for the associate — a different classification question entirely.

Because so much of the front-of-house role is built around case presentation rather than clinical work, orthodontic practices see more compensation structures involving bonuses and commissions than a typical hygiene-and-restorative office does. That's the piece worth getting right first.

Treatment coordinators earn commission — they're still employees

A treatment coordinator who presents the treatment plan, walks the family through financing, and gets credit for the signed contract is frequently paid a base salary plus a commission or bonus per case start. That commission structure does not make the role a contractor relationship. The coordinator works the schedule you set, uses your consultation room and your financing paperwork, and represents the practice rather than an independent business — the classic markers of employment under CRA's guide RC4110.

Some practices pay commission as a separate, uninvoiced cheque outside the payroll system, treating it like a referral fee rather than wages. That approach leaves CPP, EI, and withholding tax unremitted on real employment income, and it's an easy thing for an audit to find because the T4 and the bank records won't agree.

The same logic applies to a treatment coordinator engaged as an independent contractor on paper while working full-time hours at your front desk under your direction. A written contract calling someone a contractor doesn't change the underlying relationship, and reclassification after the fact means the practice — not the coordinator — owes the unremitted employer and employee shares of CPP and EI, plus interest, for every year under review.

Clinical assistants, multi-office schedules, and the standard mechanics

Clinical assistants and front-desk staff are ordinary employees, run through an RP payroll account under the DPC's business number using software such as Wagepoint or QuickBooks Online Payroll, with CPP, EI, and income tax withheld, remitted on the standard calendar, and T4s issued by the last day of February. A staff member who leaves needs a Record of Employment within days of the interruption, not at year-end.

Practices running two or three locations, with the same assistants working different offices on different days, still run one payroll under one business number — the wrinkle is Ontario's Employer Health Tax, whose $1 million exemption is shared across associated employers rather than claimed separately per location, and WSIB coverage, which most dental and orthodontic offices carry by application rather than by mandatory classification. We confirm your registration status rather than assume it.

Assistants and front-desk staff also carry full ESA protections, including overtime after 44 hours in a week, which matters more than owners expect when a satellite office runs long consultation days once or twice a week. A staff member who shuttles between two of your locations in the same week is still one employer's employee for overtime purposes, so hours are totalled across both offices, not tracked separately as if they were two jobs.

Associate orthodontists, PSB risk, and paying yourself

Bringing in an associate orthodontist to cover growth or a second office raises the same self-employed-versus-employee test that applies to any dentist associate, with one added wrinkle: an associate who bills through their own corporation but works almost exclusively for your practice, on your schedule, with your staff and equipment, risks being reclassified as a personal services business — see what a personal services business is and how to avoid PSB status. A PSB loses the small business deduction and most expense deductions, which is the associate's problem more than yours, but a contract that locks them into your exclusive schedule invites the question.

Your own pay from the DPC is a yearly modelling decision rather than a fixed choice: salary is deductible to the corporation, builds RRSP room and CPP, while dividends skip payroll and CPP entirely. Most owners land on a blend, revisited each year against cash flow and the practice's growth plans — see salary or dividends from your corporation. Hiring a US-trained associate changes none of this; work performed at your Ontario chair is a T4 or T4A regardless of where they trained, though their personal US filing obligations are a separate matter covered on our cross-border tax page for orthodontists.

Source: CRA — RC4110, Employee or Self-Employed?.