Incorporating a dental hygiene practice: the right structure at the right income

What a dental hygiene professional corporation is

It is an Ontario corporation authorized by your college to practise dental hygiene: the College of Dental Hygienists of Ontario issues the certificate of authorization, the corporate name must include Professional Corporation and follow the college's naming rules, and every share must be owned by a CDHO member. There is no room for a spouse, parent, or family trust on the register — Ontario grants family shareholding only to physicians and dentists, and a hygienist's corporation does not inherit her employer-dentist's privileges. Certificate requirements and fees sit with the college and get revised, so confirm the current rules with your college before spending money on articles.

Two things the corporation will never do: protect you from professional liability, which stays personal along with your insurance and quality assurance obligations, and change who is accountable to the client in the chair.

The mobile practice is a real business — structure it like one

Mobile and independent hygiene is equipment-heavy in a way few outsiders appreciate: portable delivery units, compressors, sterilization gear, instruments in duplicate, a vehicle fitted to carry it all, and standing contracts with long-term-care homes, retirement residences, and homebound clients. A corporation gives that operation a clean home — it holds the equipment loans, signs the facility contracts, hires an assistant when the roster grows, and separates business credit from your personal name.

Mind the HST asymmetry, because it bites mobile practices hardest. Dental hygiene services are exempt, so you charge no HST — but you also recover none of the HST paid on that equipment list, the van, or your scheduling software. Price your services knowing the 13% on inputs is a true cost. If you retail products — brushes, interdental aids, whitening — that side is taxable and forces registration once it passes $30,000 in four rolling quarters.

Timing by income level

Incorporation is a threshold decision, not a status symbol. The bands below are how we actually talk about it in a discovery call:

The deferral in that last band is the entire tax case. There is no family dividend play here, so a hygienist who draws every dollar out annually gains little beyond a T2 bill and college renewal fees.

Contractor days in someone else's operatory

Plenty of hygienists are paid as independent contractors inside dentists' practices, and the label deserves scrutiny before it anchors an incorporation plan. When the dentist books the patients, owns the operatory, supplies the instruments, and sets the day sheet, the working relationship looks like employment regardless of the invoice — and routing it through a corporation invites CRA to apply personal services business treatment, which strips the small business rate and most deductions. Contractor days can be legitimate; a corporation built mainly on one dentist's schedule usually is not. Genuine self-initiated practice with your own clients is a different animal, and it is the one worth structuring.

Sequence, and what sits outside the corporation

When the numbers say go: articles first, the CDHO certificate of authorization second, then the bank account and CRA corporate tax account before the corporation bills a client — plus a payroll account the day you hire. Move facility contracts and equipment loans over from a clean date. Our incorporation and compliance service handles the chain and the annual filings after it. Some things stay personal no matter what: your registration, your CE record — including US courses and conferences, whose deductibility and occasional credentialing questions we cover on the cross-border tax page for dental hygienists — and the professional judgment the whole business runs on.

Source: College of Dental Hygienists of Ontario.