⚠️ Not professional advice. This document summarizes publicly available information on Canadian tax strategies commonly discussed for dentists and other incorporated professionals. Tax law is complex, changes frequently, and depends heavily on your province, corporate structure, family situation, and CRA's evolving interpretations (especially TOSI and GST/HST rules, which changed materially as of January 2025). Always confirm any strategy with a CPA and tax lawyer who specialize in dental/medical professional corporations before implementing it.
1. Incorporating a Dental Practice (Professional Corporation)
For most dentists earning more than they personally need to live on, incorporating is the foundation that almost every other strategy below is built on.
How it helps
Lower tax rate on retained earnings. Active business income up to the small business limit (generally $500,000) is taxed inside a Canadian-Controlled Private Corporation (CCPC) at the small business rate — roughly 9–12.2% combined federal/provincial depending on province (e.g. ~9% in Manitoba, ~11% in Alberta/BC, ~12.2% in Ontario/Quebec), versus personal marginal rates that exceed 50% above roughly $220,000–$235,000 of income.
Tax deferral. Income you don't need personally can stay in the corporation, taxed at the low rate, and invested. You only pay the second layer of personal tax when you withdraw it as salary or dividends — ideally in a lower-income year (e.g. retirement, parental leave, sabbatical).
Flexible compensation timing. A corporation lets you smooth income over good and bad years rather than being stuck with whatever the practice billed in a calendar year.
Considerations
Incorporation only makes sense once your personal living expenses are comfortably below what the practice earns — if you need to pull out essentially all profits each year, the corporate-rate advantage shrinks because you'll pay the second layer of tax anyway.
Setup and ongoing costs: separate corporate tax returns, accounting fees, payroll administration, and provincial dental regulatory requirements for professional corporations (e.g., share ownership restricted to dentists/family in some provinces).
Each province's dental regulatory college has its own rules about who can hold voting vs. non-voting shares in a "Dentistry Professional Corporation" — this affects how much income splitting is even legally possible.
2. Salary vs. Dividends — "Mixing & Matching" Personal and Corporate Tax
Once incorporated, you choose how to pay yourself out of the corporation: salary (T4, like an employee), dividends (T5, as a shareholder), or a blend. This is the core "personal vs. corporate" lever.
Factor
Salary
Dividends
RRSP contribution room
Yes — generates room (18% of earned income, up to the annual ceiling, $33,810 for 2025)
No — dividends are not "earned income" for RRSP purposes
CPP contributions
Required (both employee & employer portions, since you're both)
None — saves CPP premiums but also forfeits future CPP benefit
Corporate deduction
Fully deductible to the corporation, reducing corporate tax
Paid from after-tax corporate income (not deductible)
Income splitting with family
Possible if family member genuinely works and salary is "reasonable" for the work performed
Possible via dividend "sprinkling" to shareholder spouse/adult kids — but heavily restricted by TOSI (see next section)
Personal tax treatment
Fully taxable at regular rates
Eligible for the dividend tax credit, partially offsetting double taxation
Common approach: Pay enough salary to (a) maximize RRSP room if desired, and/or (b) qualify for things tied to "earned income" (mortgage qualification, child care expense deductions, RRSP), then top up cash-flow needs with dividends. Many dentists also pay themselves a relatively modest salary and use dividends for the bulk, particularly later in their career when CPP-building matters less.
Watch out: There's no single "best" split — it depends on your age, whether you want CPP credits, mortgage/loan qualification needs, RRSP strategy, and whether you're funding an IPP (which generally requires T4 salary income). This calculation should be redone periodically as tax brackets, CPP rates, and your personal situation change.
3. Income Splitting with Family — and the TOSI Trap
The idea
Shifting income to a spouse or adult children in lower tax brackets reduces the family's total tax bill. Historically this was done by issuing non-voting shares to a spouse/family trust and paying "sprinkled" dividends, or by employing family members in the practice.
Tax on Split Income (TOSI) — the major restriction
TOSI rules (in force since 2018, and applied strictly to professional corporations including dental corporations) tax "split income" received by family members at the top marginal rate, eliminating most of the benefit — unless an exclusion applies. Key points:
The "excluded shares" exemption — which lets adult family members in many ordinary small businesses receive dividends tax-efficiently if they own 10%+ of votes and value — generally does not apply to professional corporations like dental, medical, legal, accounting, etc., because the income is considered to flow from the dentist's personal services.
A spouse or adult child can still receive dividends without TOSI applying if they meet the "excluded business" test — broadly, they must be actively and regularly engaged in the business, generally interpreted as working an average of 20+ hours/week during the year (or in any 5 prior years).
If a family member is over 65 and the income-earning spouse is the "source individual," some additional relief exists, but it's narrow.
Practical, lower-risk income-splitting tools
Reasonable salaries to family members who genuinely perform work (reception, bookkeeping, hygiene, practice management). The amount must reflect what you'd pay an arm's-length employee for the same role/hours — CRA can and does request job descriptions, timesheets, and payroll records.
Spousal RRSPs — contribute to a spouse's RRSP (within your own contribution room) to build retirement income in their hands.
Pension income splitting in retirement — once drawing retirement income (including from an IPP or RRIF), up to 50% can be allocated to a lower-income spouse for tax purposes.
Prescribed rate loans to a spouse or family trust for investing (see Section 11) — this is an income-splitting strategy outside the corporate dividend context, so TOSI is less of an issue for the investment returns earned this way (though attribution rules still must be respected via the loan structure).
Documentation is everything. If you employ or pay dividends to family, keep contemporaneous records: job descriptions, hours worked, comparison to market wages, and shareholder agreements/minutes for share issuances.
4. Individual Pension Plans (IPPs) Retirement
An IPP is a one-person defined benefit pension plan sponsored by your corporation. It is one of the most powerful tax-deferral tools available to incorporated dentists in their 40s–60s.
Bigger contribution room than an RRSP for those roughly age 40+ — can meaningfully exceed the RRSP limit (which is $33,810 for 2025 / $31,560 cited for 2026 in some sources), with the gap widening as you get older.
Contributions are tax-deductible to the corporation and grow tax-deferred, similar to an RRSP, but the corporation can also fund "past service" contributions for years you worked but under-contributed — a large one-time deduction.
Investment management and administration fees are deductible to the corporation (unlike RRSP fees, which generally are not deductible personally).
Creditor protection under provincial pension legislation — relevant for professionals worried about litigation exposure.
If investment returns underperform, the corporation may be required to "top up" the plan (an extra deductible contribution) — viewed by some as a feature (forces disciplined saving) and by others as a downside (less flexible than an RRSP).
Best fit: Dentists roughly 40–65 years old with stable, well-established practices and T4 salary income (an IPP requires pensionable earnings, so your salary/dividend mix matters here too).
5. Holding Companies & Managing Passive Income
Many incorporated dentists eventually set up a separate holding company (Holdco) that owns shares of the dental professional corporation (Opco), often via a tax-free "Section 85" rollover or simply by paying dividends up from Opco to Holdco (which generally flow tax-free between connected corporations).
Why use a Holdco?
Creditor protection — investments and excess cash sit in Holdco, separated from the operating risks (and potential liability claims) of the dental practice.
Passive income management — keeps investment assets organizationally distinct, which can simplify the "small business deduction" passive-income grind-down calculation (see below).
Estate and succession planning — can simplify eventually selling the practice (Opco) while retaining investment assets in Holdco.
The $50,000 passive income grind. If a CCPC (and its associated corporations, including a Holdco) earn more than $50,000 of "adjusted aggregate investment income" in a year, the $500,000 small business limit available at the low tax rate is reduced by $5 for every $1 of passive income over that threshold — fully eliminated at $150,000 of passive income. This pushes more active business income into the higher general corporate tax rate. Managing investment income (e.g., via corporate-owned life insurance, which doesn't generate annual taxable passive income the same way, or via an IPP, which is outside the corporation) is part of the planning conversation here.
6. Corporate-Owned Life Insurance & the Capital Dividend Account (CDA)
This is often pitched as a "whole life insurance tax strategy" — and it can be legitimate, but it's a long-term, high-cost commitment that needs careful evaluation.
How it works
The corporation (often the Holdco) owns a permanent (whole life or universal life) policy on the dentist's life. Premiums are paid with corporate dollars (not deductible, but at the low corporate tax rate, so the after-tax cost of funding premiums is lower than paying personally).
Cash value inside the policy grows tax-deferred and can shelter investment growth from the annual passive-income taxation that would otherwise apply to a corporate investment account (helping with the $50,000 passive income grind described above).
On death, the corporation receives the death benefit tax-free. The amount of that benefit in excess of the policy's adjusted cost basis (ACB) is credited to the corporation's Capital Dividend Account (CDA).
The corporation can then pay out CDA balances to shareholders (e.g., your estate or surviving spouse) as a tax-free capital dividend — by filing CRA Form T2054 on or before the dividend payment date.
Some strategies also use the policy's cash value as loan collateral during retirement for tax-efficient access to funds (an "insurance retirement plan" style approach) — this is more aggressive and warrants specialist review.
Considerations
Permanent life insurance is expensive and illiquid in early years; it's generally only attractive if you have a genuine need for life insurance and excess corporate cash that won't be needed for years/decades.
The tax benefit is realized mainly on death — it is an estate-planning and corporate surplus-stripping tool more than an "annual tax return" trick.
Should be evaluated alongside alternatives (simply investing in a low-turnover portfolio, an IPP, or paying down debt) — insurance salespeople have an incentive to oversell this.
7. Business Expenses, Vehicles, Home Office & CCA
Whether you're unincorporated (sole proprietor/associate) or incorporated, properly claiming legitimate business expenses reduces taxable income. The key is "ordinary and necessary," reasonable, and well-documented.
Common deductible categories for dentists
Continuing education, conferences, professional dues (e.g., provincial dental association, CDA membership), licensing fees, malpractice/liability insurance.
Lab fees, dental supplies, equipment (subject to Capital Cost Allowance rules — see below), staff salaries and benefits.
Office rent or, if you own the building personally and lease it to your corporation, rental income/expense planning (and potential income splitting if a spouse co-owns the building).
Accounting, legal, and bookkeeping fees.
Advertising/marketing, practice website, software/PMS systems.
Vehicle expenses — limits to know (2026)
Item
2026 Limit
CCA ceiling — Class 10.1 passenger vehicles
$39,000 before tax (up from $38,000) for vehicles acquired in 2026
CCA ceiling — Class 54 zero-emission passenger vehicles
$61,000 before tax (unchanged)
Deductible lease costs
$1,100/month before tax for new leases
Deductible loan interest
$350/month for new vehicle loans
Tax-exempt per-km allowance (employer to employee, provinces)
73¢/km for first 5,000 km, 67¢/km thereafter
How this actually plays out: If your corporation owns or leases the vehicle and you use it personally too, you'll have a taxable benefit for personal use unless you reimburse the corporation or carefully track business-use percentage with a mileage log. Alternatively, you can own the vehicle personally and have the corporation pay you a tax-free per-km allowance (within the CRA rates above) for business use — often simpler and avoids the standby-charge/operating-benefit complexity of corporate-owned vehicles.
Audit risk area. Vehicle and "mixed-use" expenses (home office, travel that combines business and personal/family trips, meals) are among the most commonly reassessed items for professionals. Keep a mileage log, retain receipts, and ensure any "business trip" to a conference has a genuine, documentable business purpose for the portion claimed.
Capital Cost Allowance (CCA) on equipment
Dental equipment, computers, leasehold improvements, and (for some) the practice itself (goodwill, if purchased) are depreciated over time via CCA classes rather than expensed all at once — though enhanced first-year deductions (e.g., the temporary full expensing rules for certain equipment, where still available) can accelerate this.
Leasehold improvements when renovating/building out a clinic are typically amortized over the lease term (Class 13).
8. Health Spending Accounts / Private Health Services Plans (PHSP)
If you're incorporated, your corporation can establish a PHSP/HSA to cover medical, dental, vision, and paramedical expenses for you, your spouse, and dependents.
100% deductible to the corporation and 100% tax-free to you as the recipient — unlike paying these costs personally where only amounts above ~3% of net income (or a fixed threshold) qualify for the non-refundable Medical Expense Tax Credit.
Covers most expenses eligible under the federal Medical Expense Tax Credit list: dental work, orthodontics, vision care/glasses, physiotherapy, psychology, fertility treatments, and more.
Effectively converts a personal, after-tax expense into a pre-tax corporate one — a meaningful saving (often cited as 25–40% effective savings depending on your marginal rate).
Typically administered through a third-party PHSP administrator to ensure CRA compliance (proper plan documents, claims adjudication) — DIY arrangements risk being recharacterized as taxable benefits.
9. Selling the Practice — Lifetime Capital Gains Exemption (LCGE)
When you eventually sell your dental practice (shares of your professional corporation, where permitted), the LCGE can shelter a large amount of the gain from tax entirely.
For 2026, the LCGE shelters up to $1,275,000 of capital gains on Qualified Small Business Corporation (QSBC) shares per individual — meaning a couple who each own qualifying shares could potentially shelter more than $2.5 million combined.
Qualification tests (broadly): the company must be a CCPC, at least 90% of the fair market value of its assets must be used in an active business in Canada at the time of sale, more than 50% of asset value must have been used in an active business throughout the preceding 24 months, and the shares must have been held for at least 24 months and not owned by certain non-individuals during that time.
Excess cash/investments can disqualify you. A practice that has accumulated a large investment portfolio inside Opco may fail the 90%/50% "active asset" tests. This is a major reason dentists move investments into a separate Holdco well before a planned sale — "purifying" Opco so it still qualifies for the LCGE.
Planning for this should start years before a sale — last-minute "purification" transactions can trigger their own tax issues and need professional structuring.
Family trusts have historically been used to multiply LCGE access among family members who hold shares through the trust — though this requires the family members to also pass the relevant ownership/use tests and, post-TOSI, careful review of whether dividend income to those beneficiaries would be taxed at top rates in the meantime.
10. GST/HST — A Often-Overlooked Area (Changed in 2025)
Most dental services are GST/HST-exempt supplies (no GST/HST charged to patients), while certain items — like orthodontic appliances and purely cosmetic procedures — are zero-rated or taxable.
Major 2025 change: CRA revoked its long-standing administrative arrangement that allowed dentists to claim a flat 35% of GST/HST paid as input tax credits (ITCs). As of January 1, 2025, dentists must use the standard ITC rules under the Excise Tax Act — claiming ITCs based on actual use of inputs in taxable vs. exempt activities.
Practical impact: Practices need much better record-keeping to substantiate any ITC claims (e.g., on equipment used partly for taxable orthodontic work). Many practices will see ITC claims drop versus the old 35% shortcut unless they can document a higher taxable-use percentage.
Full ITCs generally remain available for capital property (equipment) used more than 50% in taxable/zero-rated activities.
If your practice was relying on the old 35% ITC shortcut, have your accountant review your GST/HST filing methodology for 2025 onward — this is a compliance area CRA is actively focused on for dental practices.
11. Prescribed Rate Loans & Family Trusts
A higher-income dentist can lend money to a lower-income spouse, adult child, or family trust at the CRA prescribed interest rate (3% for Q2 2026) to invest. As long as the borrower pays the interest by January 30 of the following year and a proper loan agreement exists, investment income/growth is taxed in the borrower's (lower) hands rather than attributed back to the lender.
The rate can be locked in for the life of the loan at the time it's made — so loans made when the prescribed rate is low remain advantageous even if rates rise later.
Family trusts can be used to receive dividends from the corporation and allocate income among multiple beneficiaries (subject to TOSI for dividends from the dental corporation specifically) or to hold assets purchased with prescribed-rate loan proceeds for more flexible future distribution.
12. Other Techniques Worth Knowing
Retirement accounts
RRSP / Spousal RRSP — standard tax-deferred retirement saving; spousal RRSPs help equalize retirement income between spouses.
TFSA — tax-free growth; useful both personally and (in some structures) as a place to direct dividend income for tax-free compounding.
FHSA (First Home Savings Account) — relevant for associates/new grads saving for a first home, combining RRSP-like deductions with TFSA-like tax-free withdrawals.
Debt and cash flow
Student loan interest credit — interest paid on qualifying government student loans is eligible for a non-refundable federal/provincial tax credit; many new dentists overlook this.
Practice acquisition loan interest — interest on money borrowed to purchase a practice or buy into a partnership/corporation is generally deductible against the related income.
Leverage/"debt swap" strategies (e.g., restructuring non-deductible mortgage debt into deductible investment debt) exist but are complex and higher-risk — get specialized advice before pursuing.
Charitable giving
Donating appreciated securities (rather than cash) from a corporate or personal investment account to a registered charity eliminates capital gains tax on the donated securities while still generating a donation tax credit/deduction — and for corporations, the full capital gain (not just 50%) can be added to the CDA, allowing a future tax-free capital dividend.
Associates vs. owners
Associate dentists (not yet practice owners) are often paid as independent contractors and can deduct reasonable business expenses (continuing education, professional dues, malpractice insurance, a portion of vehicle/home office costs if applicable) against that income, and may also have the option to incorporate depending on the arrangement and provincial rules.
Associates should track whether they're truly self-employed vs. an employee for tax purposes — misclassification affects what's deductible and CPP/EI treatment.
Multi-practice / DSO structures
Dentists who own multiple locations or are part of a Dental Service Organization (DSO) affiliation often use a multi-corporate structure (e.g., a management company charging fees to each clinic corporation) — this introduces additional planning opportunities (income splitting across entities, consolidating overhead) but also additional complexity (associated corporation rules affecting the $500,000 small business limit, which must be shared among associated corporations).
13. Year-Round Planning Checklist
Revisit your salary/dividend mix annually with your accountant — don't "set and forget."
Confirm any family members on payroll or receiving dividends meet documentation standards for reasonableness and the TOSI "excluded business" test.
If 40+, get an IPP feasibility analysis — compare projected IPP vs. RRSP outcomes.
Track corporate passive investment income against the $50,000 threshold; consider a Holdco and/or insurance-based strategies if approaching it.
Set up a PHSP/Health Spending Account if you aren't already using one.
Keep a contemporaneous vehicle mileage log and review whether corporate ownership vs. personal ownership + per-km reimbursement is more efficient for your situation.
Review GST/HST ITC methodology for 2025+ rules if your practice does any taxable/zero-rated work (orthodontics, cosmetic).
If planning to sell within 5–10 years, start "purifying" the corporation to protect LCGE eligibility.
Consider donating appreciated securities instead of cash for charitable giving.
Revisit whether a prescribed rate loan makes sense given the current rate (3% as of Q2 2026) and your spouse's/family's marginal rates.
