Register, even though the exam lane charges no tax
The most expensive myth in optometry tax is "we do not charge HST, so we do not need to register." It fails twice. Zero-rated sales are taxable supplies at a 0% rate, so prescription eyewear counts toward the $30,000 small-supplier threshold measured over four calendar quarters; most dispensing practices cross it quickly, and registration stops being optional. And registration is what makes input tax credits claimable at all: an unregistered practice absorbs 13% on every frame order and lab invoice it could have recovered.
The result is unusual among health professions. A physician's exempt practice recovers nothing; an optometrist running a dispensary through the same corporation recovers the HST on most of what the dispensary buys, provided sales and purchases are coded to the right lane all year rather than sorted at filing time.
If you have been dispensing without registering, the situation is fixable and usually worth fixing. Registration can be arranged, the lanes rebuilt from sales records, and input tax credits are generally claimable for up to four years for most registrants, so past frame and lab invoices are not automatically lost. We have done this cleanup often enough to know the order of operations that keeps CRA comfortable while the money comes back.
The three-way split, line by line
Everything the practice sells lands in one of three lanes, and the lane decides both what you charge and what you recover.
| What you sell | HST charged | ITCs on related costs |
|---|---|---|
| Eye exams and other clinical services | None — exempt | No; the 13% on clinical overhead is simply a cost |
| Glasses and contact lenses dispensed on a prescription or assessment record | 0% — zero-rated | Yes: frames, lenses, lab charges, dispensary overhead |
| Non-prescription sunglasses, ready-made readers, solutions, accessories | 13% | Yes |
The middle lane is the one practices get wrong in both directions: charging 13% on prescription eyewear that should leave at 0%, or treating the whole dispensary as exempt and abandoning the credits that come with it. Both errors compound quietly until a patient question or a CRA letter surfaces them.
ITC allocation is where CRA actually looks
Costs that serve the whole practice, like rent, utilities, software and the front desk, sit partly in exempt clinical activity and partly in commercial dispensing, so their credits must be apportioned on a fair and reasonable basis and applied consistently from period to period. Capital equipment follows a harsher rule: primary use, more than 50%, decides the credit in full or not at all. Because zero-rated sellers are structural refund filers, CRA verifies refund claims as a matter of routine; a return supported by lane-by-lane workpapers clears quickly, while one built on estimates invites a longer conversation. When a review letter does arrive, our CRA Audit and Review Support takes over the correspondence.
Filing frequency is a cash-flow decision, not a default. Annual filing is the standard assignment under $1.5 million in taxable supplies, but a refund-position practice can elect quarterly or monthly reporting and stop lending its working capital interest-free.
The corporation's T2 on a calendar that behaves
An Optometry Professional Corporation is a Canadian-controlled private corporation, taxed at roughly 12.2% combined in Ontario on its first $500,000 of active practice income. Our Corporate Tax Filing engagement builds the schedule around the practice year: the T2 is due six months after year-end, the balance owing lands three months after year-end for most small professional corporations, and once a year's tax bill passes $3,000, instalments begin the following year. Because the same team prepares the HST returns and the T2, the dispensary's numbers agree everywhere they appear, which prevents most desk-review letters from ever being written.
Owners, associates and the personal side
Salary means T4s by the last day of February; dividends mean T5s; both mean a personal return prepared with the corporate picture in view, which is why we file them together through Personal Tax Filing. Associate optometrists paid per exam or on a split usually file as self-employed on a T2125 with their own expenses: equipment, college and association dues, mileage between clinics. For an associate not yet ready to incorporate, CPA Quick Support at $99 a month keeps a CPA on call for the year's questions without a new engagement letter each time.
Source: CRA — GST/HST for businesses.
