By the TMP Corp CPA team. Last updated: July 2026.
Incorporating your practice mainly lets you defer tax on income you don’t need to spend personally – money taxed at a low corporate rate stays in the company and compounds, instead of being taxed at your top personal rate first. It only pays off above a certain income level, and it adds real cost and paperwork. Here’s the real math, by profession.
Doctors, dentists and lawyers weighing whether to incorporate their practice in Canada.
What is a professional corporation (PC)?
A professional corporation is a corporation set up for someone in a regulated profession — medicine, dentistry, law, and others — to carry on their practice through. Structurally it’s a normal Canadian-controlled private corporation (CCPC), as the CRA (Canada Revenue Agency) defines the term. The difference is regulatory: your provincial college or law society must approve it, and it comes with restrictions a standard corporation doesn’t have.
How a PC differs from a regular corporation
A PC needs sign-off from your regulator before you incorporate, and again if its share structure changes. Voting shares are usually restricted to licensed members of the profession — you can’t simply hand voting control to a spouse. Naming rules are stricter too: most colleges require the legal name to include the practitioner’s name and a designation like “Medicine Professional Corporation.” None of this changes how the corporation is taxed — only who can own it and what it’s called.
Which professions can incorporate in Canada, and who governs it
Physicians, dentists, lawyers, and other regulated professionals — accountants, veterinarians, engineers — can incorporate in most provinces. Approval sits with the profession’s regulator: the College of Physicians and Surgeons for doctors, the dental college for dentists, the law society for lawyers. Rules vary by province, so confirm requirements with your own regulator before filing.
Should you incorporate your practice? The short answer
Does it pay off? Roughly: yes, once you’re earning more than you personally need to spend, and no, if you’re already drawing out everything you make. The table below is the fast version; the sections after it walk through why.
It’s the gap between what you earn and spend — not the raw number — that decides whether incorporating your practice pays off.
| Situation | Incorporation generally… |
|---|---|
| You earn well above your living expenses and can leave money in the practice | Pays off — meaningful deferral, compounds over years |
| You spend close to everything you earn | Adds cost and complexity for little tax benefit |
| You’re a new grad still building a client or patient base | Usually wait — revisit once income stabilizes |
| You carry heavy student or professional debt you’re actively paying down | Often premature — see below |
| You’re paid as an employee (most residents, some associates) | Not applicable — you generally can’t bill through a PC as an employee |
The income level where incorporation starts to pay
There’s no single magic number — it depends on your spending, province, and debt — but as a working test: if your practice consistently earns more than your lifestyle needs, and you can leave a meaningful amount in the corporation each year, incorporation is usually worth modelling. For many physicians and established dentists that shows up in the mid-to-high six figures of practice income, but it’s the gap between what you earn and what you spend that matters, not the raw number.
When it does not make sense
Incorporation adds a second tax return, corporate filing fees, and ongoing bookkeeping — costs you eat every year regardless. It stops being worth it when: you spend essentially everything you bill; you’re carrying high-interest debt that should be paid down first; or you’re an employee rather than self-employed, in which case you generally can’t bill income through a PC at all.
The tax benefits of a professional corporation
Tax deferral — the big one
Income left inside the corporation is taxed at a low rate and keeps compounding; income drawn out personally is taxed at a higher rate.
This is the core benefit, and it’s a deferral, not a permanent saving. Active business income inside a Canadian-controlled private corporation (CCPC) qualifies for the small business deduction (SBD) on the first $500,000 of active income each year, taxed at roughly 9–12.2% combined federal-provincial. Compare that to a personal top marginal rate of roughly 48–54%, depending on province. Leave money in the corporation instead of drawing it all out, and you defer more than 40 percentage points of tax — for as long as it stays there.
| Income left in the corporation (SBD rate) | Income drawn out personally (top rate) | |
|---|---|---|
| Approx. combined tax rate | ~9%–12.2% | ~48%–54% |
| On $100,000 of income | Roughly $9,000–$12,200 in corporate tax | Roughly $48,000–$54,000 in personal tax |
| What happens to the gap | Stays invested in the corporation | Already taxed, in your hands |
Illustrative example — not advice. Dr. Okafor nets $350,000 after overhead and needs $180,000 a year for household spending. Unincorporated, all $350,000 is taxed personally, much of it at her top bracket. Incorporated, she pays herself $180,000 and leaves $170,000 in the corporation at roughly 12% tax — about $150,000 left, versus $80,000–$90,000 if that same amount had been taxed personally first. That gap is deferred, not free — she’ll pay personal tax whenever she draws it out. Figures are rounded and illustrative only.
Income smoothing & timing
A corporation also lets you control when income hits your personal return. In a lean year — parental leave, a slow first year, a sabbatical — you can draw more from money left in stronger years, instead of a large, unevenly-taxed personal income every year. Smoothing draws across good and bad years can meaningfully cut total personal tax paid, since brackets are progressive.
Income splitting with family — and the TOSI limits since 2018
Historically, incorporated professionals paid dividends to a spouse or adult children who held shares, splitting income across lower brackets. Since 2018, the tax on split income (TOSI) rules have shut most of that down: dividends to family members not meaningfully involved in the practice are generally taxed at the top personal rate regardless of their own income. Splitting still works in narrower cases — a spouse doing genuine hours in the practice, for example. See our TOSI and income-splitting deep dive before assuming a splitting strategy still works.
Lifetime Capital Gains Exemption (LCGE) on selling practice/shares
If you eventually sell your practice’s shares — common for dentists and some medical or law practices with real goodwill — the lifetime capital gains exemption can shelter roughly the first $1.25 million of the gain from tax, provided the shares qualify (broadly, the corporation must be a qualifying small business corporation at the time of sale, among other conditions). It’s one of the more valuable long-term benefits of having practised through a corporation, though not every PC sale qualifies automatically. Our LCGE guide on selling practice shares covers the qualifying conditions.
Individual Pension Plans (IPP) & corporate-owned insurance (brief, signpost only)
Two more tools sit on top of the basics: an Individual Pension Plan (IPP) can let an incorporated professional in their late 40s or older build retirement savings beyond regular RRSP (Registered Retirement Savings Plan) limits, and corporate-owned life insurance sometimes supports estate and holding-company planning. Both deserve their own conversation with your accountant.
The costs and downsides of incorporating
Setup + annual costs
Incorporating isn’t free, and it isn’t one-time. Expect incorporation fees, annual T2 preparation, bookkeeping, and your regulator’s PC filing fees — on top of whatever you already pay for your personal return. For a modest practice, these costs can eat into a small deferral benefit.
Added complexity & compliance
A corporation means payroll remittances if you pay salary, dividend paperwork if you pay dividends, a separate bank account, and a second set of books — none of it difficult once set up, but ongoing work your unincorporated self never had to think about.
The $50,000 passive-income rule
Since 2019, if a CCPC earns more than $50,000 of passive investment income in a year (interest, dividends, most capital gains earned inside the corporation), the small business deduction on its active income starts to shrink — disappearing completely once passive income hits $150,000. The more you invest successfully inside your corporation, the more it grinds down the tax break that made incorporating attractive in the first place. This matters most for professionals incorporated a long time with sizeable retained earnings, and a large, growing corporate investment portfolio can also draw more CRA scrutiny than a lean operating company. Read our deep dive on the SBD and the $50k passive-income clawback; a holding company, covered in our holding company guide, is one common way to plan around it.
The “spend‑it‑all” myth
Here’s the trap: incorporation saves you nothing if you draw every dollar out every year. The benefit comes from leaving money inside the corporation, taxed at the low rate, so it can grow. An empty corporate bank account every December 31st means you’ve paid for the extra paperwork without getting the deferral that justifies it.
Salary vs. dividends: how incorporated professionals pay themselves
Salary
A salary is deductible to the corporation and creates RRSP room and CPP (Canada Pension Plan) contributions for you. It also means payroll remittances, with both employer and employee CPP portions coming out of the corporation.
Dividends
Dividends are simpler to administer — no payroll account, no source deductions — but they create no RRSP room and don’t count toward CPP. An all-dividend strategy can quietly starve your retirement account of contribution room.
The typical mix
Most incorporated professionals use a blend: enough salary for reasonable RRSP room and CPP, topped up with dividends for flexibility. Whichever mix you land on, salary and dividends both ultimately flow onto your personal return, so keep that filing in step with the corporate side. The right split depends on your age, retirement savings strategy, and cash-flow needs. Our salary-vs-dividends breakdown runs through the trade-offs with worked numbers.
Incorporation by profession — the rules that differ
How incorporation rules compare across doctors, dentists and lawyers — can-incorporate status, family income splitting, governing regulator, and a notable wrinkle for each. Rules vary by province.
| Profession | Can incorporate | Family income splitting | Governed by | Notable wrinkle |
|---|---|---|---|---|
| Physicians | Yes, all provinces | Often possible (subject to TOSI; varies by province) | Provincial College of Physicians and Surgeons | Many new-attending physicians wait until billings stabilize before incorporating |
| Dentists | Yes, all provinces | Broadly similar to medicine | Provincial dental college | Rules and structure closely track the medical PC model |
| Lawyers | Yes, via a “law corporation” | Usually blocked | Provincial law society | Voting shares generally must be held by licensed lawyers, which shuts down most family income splitting |
| Other regulated professionals (accountants, engineers, etc.) | Often yes | Varies by regulator | Provincial regulator | Don’t assume medicine’s rules apply — check your own college’s PC requirements |
Doctors / physicians
Physicians are Canada’s largest group of incorporated professionals. Some provinces allow family members to hold non-voting shares, which historically supported income splitting — now narrowed by TOSI. Many new attendings wait until billings are steady before taking on a PC’s added cost.
Dentists
Dental PC rules broadly mirror medicine’s: regulator approval, restricted voting shares, similar naming conventions. Dentists with built-up practice goodwill are also most likely to see real value from the LCGE on an eventual sale.
Lawyers
Law society rules are typically stricter: voting shares in a law corporation generally must be held by licensed lawyers, limiting the family-income-splitting angle available to physicians and dentists. The tax deferral benefit still applies in full — only the splitting piece is constrained.
Other regulated professionals
Accountants, engineers, veterinarians, and others can often incorporate too, under similar principles. Treat this article’s detail as a guide to the kind of rules you’ll encounter, and confirm specifics with your own regulator.
How to incorporate your professional practice (step‑by‑step)
Step 1: Get college/regulator approval for the PC. Before filing articles of incorporation, your provincial college or law society typically needs to approve the corporation’s name, share structure, and the practitioner as sole voting shareholder. Start here — incorporating out of order can mean refiling.
Step 2: Incorporate (federal vs. provincial) and issue shares. Most professionals incorporate provincially, since the practice is tied to a provincial licence, though federal incorporation is available. Once approved, file articles of incorporation and issue shares per your regulator’s voting/non-voting rules.
Step 3: Set up the corporate bank account, payroll/dividend process & bookkeeping. Open a dedicated corporate account, decide on a salary/dividend mix, and put bookkeeping in place from day one — reconstructing a year of transactions later is expensive and avoidable.
Step 4: File your first T2 corporate return. The T2 is generally due six months after your fiscal year-end, though any tax owing is typically due two or three months after year-end — don’t wait for the filing deadline to plan for payment. Once you’re set up, our corporate tax filing service covers ongoing compliance.
Frequently asked questions
At what income should a doctor incorporate in Canada?
There’s no single dollar figure — it depends on your spending, debt, and province. The practical test is the gap between what you earn and what you personally need: the more you can leave in the corporation each year, the sooner incorporating starts to pay off. Many physicians find it worthwhile once that gap becomes consistent and substantial.
How much tax does incorporating actually save?
Incorporating mainly defers tax rather than eliminating it — income left in the corporation is taxed around 9–12.2% instead of up to 48–54% personally, though you’ll still pay personal tax when you draw it out. The saving comes from years of compounding on the deferred amount, not from avoiding tax altogether.
Can a professional corporation split income with family members?
Yes, but it’s far more limited than it used to be. Since 2018, the TOSI rules generally tax dividends paid to family members who aren’t actively working in the practice at the top personal rate, which removes most of the benefit. Meaningful involvement by the family member is usually required for splitting to still work.
What are the disadvantages of a professional corporation?
Ongoing costs — incorporation fees, a second tax return, bookkeeping, and regulator filing fees — plus added complexity: payroll, dividend paperwork, and separate corporate banking. If you can’t leave income in the corporation, these costs can outweigh the deferral benefit.
Is it worth incorporating if I still have professional or student debt?
Usually not yet. High-interest debt typically outperforms the tax deferral benefit as a use of your cash, and you’d be adding incorporation costs on top of debt payments. Most professionals are better off paying down debt aggressively first, then revisiting incorporation once that load is lighter.
Can lawyers income‑split through a law corporation?
Generally no, or only in a limited way. Law society rules typically require voting shares to be held by licensed lawyers, which blocks the classic family-dividend-splitting structure available in some other professions. Lawyers still get the tax deferral benefit — the splitting angle is just largely off the table.
Salary or dividends — which is better for an incorporated professional?
Neither is universally better — most incorporated professionals use both. Salary builds RRSP room and CPP contributions but adds payroll administration; dividends are simpler but build neither. The right mix depends on your retirement plan, cash flow, and how much you want to keep inside the corporation.
Do I still pay less tax if I spend everything the corporation earns?
No — this is the “spend-it-all” myth. The deferral benefit only exists on income left inside the corporation. If you draw out every dollar every year, you’ve paid the incorporation and compliance costs without getting the tax deferral that’s supposed to justify them.
Get the incorporation decision right
Incorporation is a genuine tax deferral tool for doctors, dentists, and lawyers — but it’s not automatic, and the numbers only work above a certain point. We set these up every week; the conversation starts with your actual income, spending, and provincial rates. If a PC might make sense, our professional corporation service page is a good next stop, or see the broader should I incorporate my small business decision if you don’t fit medicine, dentistry, or law. U.S. clients, assets, or licensing ties? See what changes for Canadians with a US LLC or corporation first. Ready to run your own numbers? Book a consult with our team.
This article is general information, not personal tax advice. Every practice and province is different — talk to a CPA about your specific numbers before making an incorporation decision.