Medical Practice CPA Ontario 2026 | Physician + MPC Tax Planning
Reviewed by Bader A. Chowdry, CPA, CA, LPA on
Quick answer (50 words)
Medical practice CPA Ontario 2026 in one line: Ontario physicians should incorporate a Medicine Professional Corporation (MPC), obtain a CPSO Certificate of Authorization, and plan salary/dividend/bonus + Section 85 practice rollover + LCGE-on-sale under one roof. Insight Accounting CPA — Bader A. Chowdry, CPA, CA, LPA — delivers physician CPA engagements from Mississauga.
Last updated: July 19, 2026. Author: Bader A. Chowdry, CPA, CA, LPA — Founder, Insight Accounting CPA Professional Corporation, Mississauga, Ontario. Reviewed by Bader A. Chowdry, CPA, CA, LPA.
Why medical practice CPA work in Ontario needs a specialized CPA
Most general-practice CPAs know how to file a T1 and a T2. They do not know the CPSO Certificate of Authorization renewal cycle, the OHIP payment reconciliation quirks, the shareholder-restriction rules on a Medicine Professional Corporation, or the interaction between physician remuneration models and TOSI. A generic CPA can cost you five figures a year through missed structure decisions.
Insight Accounting CPA Professional Corporation — led by Bader A. Chowdry, CPA, CA, LPA — focuses on Ontario medical practices from Mississauga: family medicine, specialists, locums, dentists, and multi-clinic groups. Bader holds three credentials that matter here: the CPA (Chartered Professional Accountant, Ontario) confirms baseline competence; the CA (Chartered Accountant) reflects the pre-merger designation carried forward under CPA Ontario; and the LPA (Licensed Public Accountant) is the licence required under Ontario’s Public Accounting Act, 2004 to issue an auditor’s report or review engagement on a professional corporation’s financial statements. Very few CPAs in Ontario hold the LPA — approximately 250 across the province — which means most CPAs cannot sign the assurance reports that some medical partnerships and multi-clinic groups need.
What a specialized medical practice CPA delivers
- MPC structure design — incorporation, share class engineering, CPSO Certificate of Authorization application, and family shareholder analysis under Ontario Regulation 665/05.
- Physician remuneration mix — salary vs. dividend vs. bonus, RRSP room preservation, CPP contribution planning, income-splitting analysis (Tax on Split Income — TOSI — screening under section 120.4 of the Income Tax Act).
- Practice buy/sell + Section 85 rollover — transferring practice goodwill and equipment into the MPC on a tax-deferred basis, then multiplying the LCGE on eventual sale.
- OHIP + non-OHIP reconciliation — matching OHIP remittance advices to billed services, tracking clawbacks, separating GST/HST-exempt from taxable non-OHIP revenue.
- Locum + multi-province filings — cross-provincial GST/HST registration decisions, T2125 vs. T2 reporting, source deductions on locum agency payments.
What is a Medicine Professional Corporation (MPC) in Ontario?
Q: What is a Medicine Professional Corporation (MPC) in Ontario?
A Medicine Professional Corporation (MPC) is a corporation incorporated under Ontario’s Business Corporations Act by a physician member of the College of Physicians and Surgeons of Ontario (CPSO). It holds a Certificate of Authorization issued by the CPSO under section 85.1 of the Health Professions Procedural Code (Schedule 2 to the Regulated Health Professions Act, 1991), which authorizes the MPC to practise medicine. All voting shares must be held by CPSO members; non-voting shares may be held by the physician’s spouse, children, or parents, or by a family trust whose beneficiaries are those family members. Source: CPSO Incorporation.
Naming requirements
The corporation’s legal name must include the words “Medicine Professional Corporation” (or the French version, “Médecine Société Professionnelle”) and the physician’s name (or a surname, given name, or initials by which the physician is commonly known). No trade names, no marketing embellishments. “Toronto Family Medicine PC” is invalid; “J. Smith Medicine Professional Corporation” is valid.
CPSO Certificate of Authorization
Practising medicine through a corporation without a CPSO Certificate of Authorization is an offence. The certificate must be renewed annually — $175 fee for 2026 — and lapses if the physician’s CPSO membership is suspended, revoked, or not renewed. Insight Accounting CPA builds the CPSO renewal cycle into every MPC client’s year-end calendar to prevent inadvertent lapses.
Should an Ontario physician incorporate a Medicine Professional Corporation?
Q: Should an Ontario physician incorporate a Medicine Professional Corporation?
Incorporation makes sense once a physician’s active practice income exceeds personal consumption needs by roughly $70,000-$100,000 per year. The tax deferral inside the MPC on the first $500,000 of active business income is 40 percentage points or more at Ontario’s top personal rate (53.53%) vs. the combined small-business corporate rate (12.2% pre-July 2026, dropping to 11.2% post-July under the Ontario 2026 Budget rate cut). Reinvesting deferred cash inside the MPC in passive investments, insurance, or practice expansion produces compounded value that a sole proprietor cannot match.
Incorporation does not always make sense. Physicians early in their careers with large tuition debt, or those maxed out on RRSP room with heavy consumption needs, may see minimal benefit. The MPC also introduces annual T2 corporate filing costs, CPSO renewal, corporate minute book maintenance, and passive-income planning. Insight Accounting CPA runs a break-even model in every physician onboarding to confirm net benefit exceeds cost.
The passive income trap
The single most common MPC failure I see: physicians accumulate $2M-$5M of retained earnings inside the MPC, invest them in a taxable portfolio, and trigger the passive-income grind on the small business deduction. Every $1 of passive income above $50,000 reduces the $500,000 small business limit by $5, fully eliminating the small business deduction at $150,000 of passive income. That converts the first $500,000 of active professional income from a 12.2% tax rate to Ontario’s general corporate rate (26.5% combined federal + provincial) — a $71,500 tax cost per year that could have been avoided by shifting passive investments to an individual pension plan (IPP), a Canadian-controlled private corporation holding company (holdco) below the associated-group threshold, or an insured retirement plan.
How does physician remuneration planning work: salary vs. dividend vs. bonus?
Q: How does physician remuneration planning work — salary, dividend, or bonus?
There is no single right answer. Salary generates RRSP room (18% of earned income up to the annual limit, $32,490 for 2026), builds CPP contribution history, and is deductible to the MPC. Dividend distributions do not build RRSP or CPP room, do not require source deductions, and interact with the eligible / non-eligible dividend regime under sections 89 and 121 of the Income Tax Act. Year-end bonus paid to the shareholder can strip the MPC’s active business income down to the $500,000 small business limit, preserving the low corporate tax rate.
The mechanically correct answer is usually a hybrid: pay enough salary to max RRSP room and CPP, then dividend the balance to spouse (if TOSI-exempt) and self, and use bonus to trim active income to the small business limit if the year runs hot. Bader A. Chowdry, CPA, CA, LPA runs this optimization at every MPC year-end. For deeper mechanics see the salary vs. dividend spoke.
TOSI screening
Tax on Split Income (TOSI, section 120.4) applies the top personal tax rate to dividends paid to family members who do not meet an “excluded amount” test. For MPCs, spouses of physicians are almost always caught unless the spouse is over 65 (a full-blooded exclusion) or meets the “reasonable return” test based on labour, capital, or risk contributed. Assume TOSI catches spouse dividends until proven otherwise; do not repeat the pre-2018 assumption that any spouse dividend is safe.
How does Section 85 rollover work for physician practice sales?
Q: How does Section 85 rollover work for a physician selling a practice?
Section 85 of the Income Tax Act is the tax-deferred rollover election that lets a physician transfer practice assets (equipment, leasehold improvements, patient records goodwill, accounts receivable) into an MPC at an elected amount between cost and fair market value, in exchange for share consideration (with limited allowable non-share consideration or “boot”). Filed on Form T2057.
The critical use case for physicians selling practices: the seller-physician executes a Section 85 rollover of the practice from personal sole-proprietor form into an MPC, then waits at least 24 months while the shares are held by connected family members (spouse, children over 18, family trust) so multiple LCGE claims (up to $1,275,000 each in 2026) can be claimed on the eventual share sale. This can convert a $2M practice sale from a $1M+ tax bill (top marginal rate on ordinary gain treatment) to under $100K (multiple LCGE claims + 50% inclusion rate on the residual).
The 24-month holding period, the “qualified small business corporation share” (QSBCS) test under section 110.6, and the 90%/50% asset-use tests are strict. Miss any one and the LCGE evaporates. Insight Accounting CPA models this rollover at least 24 months before the intended sale date.
For the sale mechanics see Section 85 rollover on practice sales.
What are the OHIP billings + non-OHIP income tax rules?
Q: How is OHIP billings income taxed vs. non-OHIP medical income?
OHIP fee-for-service billings are exempt from GST/HST under Schedule V, Part II of the Excise Tax Act — the physician does not charge GST/HST and cannot claim input tax credits (ITCs) on inputs used to generate that OHIP revenue. Non-OHIP income (executive medicals, cosmetic services, medical-legal opinions, expert-witness testimony, insurance-company independent medical examinations) is generally taxable at 13% HST in Ontario. Physicians who exceed the $30,000 small-supplier threshold on taxable non-OHIP revenue in any 4-consecutive-quarter window must register for GST/HST.
The common misfile: a physician who bills OHIP for 90% of revenue and cosmetic services for 10% assumes she is under the small-supplier threshold in aggregate. Only the taxable portion counts against the $30,000 threshold — and 10% of a $500K practice is $50,000 in taxable revenue, requiring GST/HST registration. Insight Accounting CPA runs the four-quarter rolling test at year-end for every physician client with mixed revenue.
OHIP reconciliation
Each OHIP remittance advice (RA) lists claims paid, claims denied, and clawbacks. Physicians who reconcile OHIP RA to their billing software monthly catch billing-code errors, missed claims, and improper clawbacks within the 6-month appeal window. Practices that skip reconciliation lose 1%-3% of billings to invisible errors annually.
How to plan an Ontario physician practice for MPC + tax + eventual sale (step-by-step)
Step 1. Confirm CPSO eligibility. Verify active independent-practice CPSO registration, no conditions restricting corporate practice, malpractice insurance in force (Canadian Medical Protective Association or equivalent).
Step 2. Incorporate the Medicine Professional Corporation. File Articles of Incorporation under Ontario’s Business Corporations Act. Name format: “[Physician’s name] Medicine Professional Corporation.” All voting shares to CPSO member(s). Non-voting shares to spouse, children, parents, or family trust (Ontario Regulation 665/05).
Step 3. Apply for CPSO Certificate of Authorization. Submit application via CPSO Member Portal. $400 fee. Certificate is generally issued within 4-6 weeks. Do not practise through the MPC until certificate is issued.
Step 4. Section 85 rollover of practice into MPC. File Form T2057. Elect amounts to defer gain on goodwill, equipment, AR. Take back shares (voting common + non-voting participating), minimize “boot.” Insight Accounting CPA models the election column-by-column.
Step 5. Design the remuneration mix. Set salary to max RRSP room. Dividend residual to shareholders after TOSI screening. Year-end bonus to trim active income to small business limit.
Step 6. Manage passive income. Cap passive income inside MPC at $50,000 to preserve full small business deduction. Excess should be redirected to individual pension plan (IPP), permanent life insurance, or a separate non-connected investment corporation (subject to associated-group rules under section 256).
Step 7. Plan for eventual sale. Track QSBCS status. Hold shares 24+ months. Consider trust for LCGE multiplication among family beneficiaries. File Form T2057 elections and section 110.6 LCGE claims on eventual disposition.
Comparison: MPC structures for different physician career stages
| Career stage | Recommended structure | Rationale |
|---|---|---|
| Early career (< 3 years post-residency, high debt) | Sole proprietor, defer incorporation | Cost of MPC > tax benefit; RRSP room valuable, debt repayment priority |
| Mid-career family physician ($400K-$700K gross) | MPC + spouse non-voting shares + TOSI screening | Small business deduction + limited income split available |
| Mid-career specialist ($700K-$1.5M gross) | MPC + IPP + insured retirement plan | Salary drives IPP contributions higher than RRSP; passive-income planning critical |
| Multi-clinic group | MPC + management corporation + associated-group planning | Section 256 associated-group rules govern $500K limit sharing |
| Approaching sale (24+ months out) | MPC + family trust freeze + LCGE multiplication | Multiplies LCGE across spouse, adult children, trust beneficiaries |
| Locum, multi-province | Sole proprietor or MPC + provincial GST/HST registration | Cross-provincial billings trigger multi-jurisdictional filings |
Frequently asked questions
Q: How much does it cost to incorporate a Medicine Professional Corporation in Ontario?
Roughly $2,500-$4,500 all-in for 2026: Ontario incorporation filing (~$300), CPSO Certificate of Authorization ($400), NUANS name search (~$60), legal Articles of Incorporation drafting ($1,000-$2,000), Insight Accounting CPA share-structure design and Section 85 rollover modelling ($1,500-$2,500).
Q: Can my spouse own shares in my MPC?
Yes — non-voting shares only, and only if your spouse is your legal spouse or common-law partner (Ontario Regulation 665/05). Dividends paid to the spouse are subject to Tax on Split Income (TOSI) unless an “excluded amount” applies. Assume TOSI catches spouse dividends until Insight Accounting CPA confirms an exclusion.
Q: What is the LCGE amount for 2026?
The Lifetime Capital Gains Exemption is $1,275,000 for 2026 (indexed annually to inflation). Each shareholder who holds Qualified Small Business Corporation shares can claim the LCGE once in their lifetime, sheltering up to $1,275,000 of capital gain per person.
Q: Do OHIP billings trigger HST?
No. OHIP fee-for-service billings are HST-exempt under Schedule V, Part II of the Excise Tax Act. Non-OHIP revenue (cosmetic, medical-legal, executive medicals) is generally taxable at 13% HST in Ontario. If taxable revenue exceeds $30,000 in 4 consecutive quarters, HST registration is mandatory.
Q: How long before a practice sale do I need to plan?
24 months minimum to qualify the shares as Qualified Small Business Corporation shares (QSBCS) for LCGE. 36 months is safer to allow time for asset cleanup, trust freeze, and multi-shareholder positioning. Bader A. Chowdry, CPA, CA, LPA models the sale runway at every mid-career MPC review.
What does Insight Accounting CPA charge for medical practice engagements?
Fixed-fee, quoted in writing, no surprise billing. Typical 2026 ranges:
- MPC incorporation + Section 85 rollover: $3,500-$5,500
- MPC annual compliance (T2 corporate return, T5 dividend slips, T4 for physician salary, HST returns if applicable): $2,400-$4,800/year
- Practice buy-side due diligence (goodwill valuation, tax vendor-view, purchase-price allocation): $5,000-$12,000
- Practice sale planning (family trust freeze, LCGE multiplication, share structure re-organization): $8,000-$18,000
- Fractional CFO / practice CFO (monthly): $2,500-$5,000/month
See /pricing/ or book a free 30-minute review.
The Insight Accounting CPA physician onboarding process
- Free 30-minute discovery — review current structure, revenue mix, MPC status, immediate tax exposures.
- Written engagement letter — fixed fee, scope, deliverables, timeline.
- Diagnostic month — CPSO renewal cycle map, salary/dividend model, passive-income audit, TOSI screening, LCGE runway.
- Structure recommendation — written memo with quantified before/after tax positions.
- Implementation — filings, elections, share-structure updates, ongoing monthly bookkeeping if in scope.
- Quarterly review — Insight Accounting CPA revisits every physician client each quarter to catch drift.
Sources cited
- CPSO Incorporation Issuance and Renewal — cpso.on.ca
- Ontario Regulation 665/05 (medicine professional corporations) — ontario.ca
- Ontario small business deduction rate — Canada.ca
- Q3-2026 CRA prescribed interest rate — Canada.ca
- Line 25400 Capital Gains Deduction — Canada.ca
Related reading
- See our OHIP billings and locum reconciliation guide for cross-provincial and audit-defence mechanics.
- Read a real case study on an MPC restructure that saved $87K/year for a Mississauga family physician.
Important — informational only, not advice. Do not use this article to make any decision.
This article is published by Insight Accounting CPA Professional Corporation for general educational purposes only. It is not tax, legal, accounting, financial, or investment advice, and nothing in this article should be relied upon — by anyone, for any purpose — to make a business, tax, financial, accounting, legal, or investment decision.
Tax law, CRA administrative positions, court interpretations, and Ontario provincial rules change frequently, sometimes retroactively, and the content of this article may be incomplete, simplified, out of date, or wrong by the time you read it. The right answer for your specific situation depends on facts this article does not know — your structure, history, jurisdiction, filings, contracts, and goals.
Before acting, engage your own Chartered Professional Accountant or qualified advisor who has reviewed your specific circumstances in writing. Insight Accounting CPA Professional Corporation, the author, and any contributors expressly disclaim all liability — direct, indirect, or consequential — for any action taken or not taken on the basis of this content.
Insight Accounting CPA Professional Corporation is led by Bader A. Chowdry, CPA, CA, LPA — licensed by CPA Ontario under the Public Accounting Act, 2004. To engage us for situation-specific advice, book a free 30-minute discovery call.
