The HST return most hygiene practices never file
Dental hygiene services provided by a CDHO registrant are HST-exempt, and exempt revenue never counts toward the $30,000 small-supplier test. A practice that sells only hygiene care can bill any amount, for years, without registering, collecting or filing a single HST return. Registering voluntarily gains nothing either: input tax credits attach only to taxable and zero-rated sales, and a pure hygiene practice makes neither. One entire category of CRA trouble, the late or mismatched HST filing, simply does not exist for you.
The caveat sits on the retail tray. Electric toothbrushes, replacement heads and take-home whitening kits sold at the chair are taxable at 13%, and those sales do count toward the threshold over four rolling calendar quarters. Most independent hygienists sell far too little product to get close, but the running total deserves its own line in the books, because crossing it forces registration almost immediately. The 13% the practice pays out on gloves, prophy paste and sterilization pouches is not wasted, meanwhile: it deducts as part of each expense's full cost.
One pair of hands, four kinds of paperwork
Independent hygienists rarely have one clean income stream in a tax year. The return has to put each arrangement where the CRA expects to find it.
| How you worked | The paperwork | Where it lands |
|---|---|---|
| Employed days at a dental office | T4, with tax and CPP withheld | Employment income on your T1 |
| Fee-for-service days on a percentage | T4A, box 048, nothing withheld | Business income on a T2125 |
| Your own patients at your own fees | No slip; your appointment records are the proof | Business income on the same T2125 |
| A practice held in a Health Profession Corporation | Corporate books and slips you issue yourself | A T2 for the corporation, T4 or T5 back to you |
Mixed years are the norm, not the exception. Two employed days beside two self-initiated days puts a T4 and a T2125 on the same T1, and expenses belong only against the independent side: the CDHO renewal and professional liability premium are deductible either way, but instruments and chairside supplies count solely against the business income.
The CRA matches T4A slips against reported income, so a clinic's box 048 figure that disagrees with your books raises questions before a human ever reads the file. The slip also does not settle your status. A hygienist labelled a contractor who works the dentist's schedule, on the dentist's instruments, with no real financial risk can be reassessed as an employee; the facts decide, not the contract's title page. We read the arrangement before we file so the return matches what actually happens in the operatory.
Year one is a filing problem; year two is a cash-flow one
The year you go independent, nothing is withheld from your business income. The T1 for a self-employed filer is due June 15, but the balance owing is still due April 30, and it now includes both shares of CPP on your net T2125 profit, including the employer half you never saw as an employee. That first payment is the number new independents remember.
The second-year surprise arrives by mail. Once net tax owing passes $3,000 in the current year and either of the two prior years, the CRA expects quarterly instalments, calculated from the very year that just stung. We set a per-deposit percentage aside from your actual margins rather than a rule of thumb, so the March and June instalments are funded before they are due, and if a CRA letter turns up anyway, our CRA Audit & Review Support takes the correspondence off your desk.
When the practice files a T2
Once a Health Profession Corporation holds the practice, the corporation files a T2 within six months of its year-end, with the first $500,000 of active income taxed at roughly 12.2% combined in Ontario, and the tax itself payable two or three months after year-end, well ahead of the filing deadline. A salary adds a payroll account and remittances; dividends need a T5 by the end of February. Our Corporate Tax Filing engagement carries the T2, the slips and the instalment schedule, and prepares your own return alongside through Personal Tax Filing so the corporate year-end and your T1 tell one story. Whether the corporation is worth forming at all is a separate decision, and our incorporation page for hygienists runs that math honestly.
Source: CRA — When to register for and start charging the GST/HST.
