Incorporating your law practice through a Professional Corporation (PC) is one of the most impactful financial decisions a Canadian lawyer can make. When structured correctly, incorporation enables tax deferral of $30,000-$80,000+ annually on income retained in the corporation, creates opportunities for income splitting with family members (within TOSI rules), and provides a vehicle for corporate investment strategies that accelerate wealth accumulation. However, incorporation is not universally beneficial — it requires sufficient income above personal spending needs, proper integration with your insurance and retirement planning, and ongoing professional management to realize its full potential.
At SG Wealth Management, we help lawyers determine the optimal timing for incorporation, design salary-dividend compensation structures, and integrate corporate strategies with tax planning, retirement planning, and wealth management as part of your comprehensive financial planning.
The financial benefit of incorporation depends primarily on one factor: whether you earn more than you spend personally. The corporation's tax advantage comes from the difference between the corporate tax rate on active business income (approximately 12.2 percent in Ontario on the first $500,000) and the personal marginal tax rate (up to 53.53 percent in Ontario). This spread of approximately 40 percent creates a significant deferral opportunity — but only on income that remains in the corporation.
General income threshold: Incorporation typically becomes beneficial when your net professional income exceeds $200,000-$250,000 and you can leave at least $50,000-$100,000 annually inside the corporation after paying yourself enough for personal expenses.
| Annual Net Income | Personal Spending | Corporate Surplus | Annual Tax Deferral | Recommendation |
|---|---|---|---|---|
| $150,000 | $130,000 | $20,000 | ~$8,000 | Marginal — costs may exceed benefit |
| $250,000 | $150,000 | $100,000 | ~$40,000 | Strong candidate for incorporation |
| $400,000 | $180,000 | $220,000 | ~$88,000 | Clear benefit — incorporate immediately |
| $600,000+ | $200,000 | $400,000+ | ~$160,000+ | Maximum benefit — complex planning warranted |
Costs to consider: Incorporation involves setup costs ($3,000-$5,000 for legal and accounting), annual corporate tax filing ($2,000-$4,000), Law Society permit fees ($200-$500 annually), and potentially higher accounting complexity. These costs total $5,000-$8,000 annually, meaning the tax deferral must exceed this amount to justify incorporation.
Unlike a standard business corporation, a law Professional Corporation has specific restrictions imposed by provincial Law Societies:
Ownership restrictions: Only the practicing lawyer (and in some provinces, family members or family trusts) can hold shares. The lawyer must hold all voting shares and maintain control of the corporation.
Liability limitations: A Professional Corporation does NOT protect against professional negligence claims. You remain personally liable for malpractice, ethical violations, and trust account mismanagement. The corporation provides liability protection only for commercial obligations (office lease, equipment financing, employment claims).
Law Society permit: Each province requires a permit or Certificate of Authorization to practice through a corporation. This involves annual renewal, compliance with naming conventions, and notification of any structural changes.
Provincial variations:
The most critical ongoing decision for an incorporated lawyer is how to extract income from the corporation. The two primary mechanisms — salary and dividends — have different tax implications:
Optimal strategy for most lawyers: A combination approach that pays enough salary to maximize RRSP room ($180,556 in salary for 2025 to generate maximum $32,490 RRSP room) and takes the remainder as eligible dividends. This balances RRSP contribution room, CPP benefits, and tax efficiency.
For lawyers earning $400,000+ net, the typical structure is:
Income retained in the corporation can be invested, creating a corporate investment portfolio that grows alongside your personal investment planning. However, corporate investment income is taxed differently than active business income:
Passive investment income: Interest, foreign dividends, and taxable capital gains earned inside a corporation are taxed at approximately 50.17 percent (Ontario) — similar to the top personal rate. However, a portion is refundable when dividends are paid out (the RDTOH mechanism), bringing the effective integrated rate close to the personal rate.
Capital gains: Only 50 percent of capital gains are included in corporate income (the inclusion rate increased to 66.67 percent for gains above $250,000 annually as of June 2024). The non-taxable portion is added to the Capital Dividend Account (CDA) and can be distributed tax-free to shareholders.
Small Business Deduction clawback: Passive investment income above $50,000 annually begins to reduce access to the small business deduction (12.2 percent rate) on active business income. At $150,000 of passive income, the SBD is fully eliminated. This creates a planning ceiling that requires careful management.
Recommended corporate investment approach:
Incorporation creates opportunities to optimize insurance ownership and premium payment:
Life insurance: Corporate-owned permanent life insurance provides tax-sheltered growth inside the corporation. Upon death, the death benefit (minus the adjusted cost basis) is credited to the CDA and can be distributed tax-free to shareholders/estate. This makes corporate-owned life insurance one of the most tax-efficient wealth transfer vehicles available to incorporated lawyers.
Disability insurance: Personal disability premiums should be paid personally (tax-free benefits). Overhead expense insurance should be corporate-paid (deductible premiums, benefits offset deductible expenses). See disability insurance for lawyers for detailed structuring.
Critical illness insurance: Corporate-owned CI policies provide tax-free benefits through the CDA mechanism. See critical illness insurance for lawyers for ownership analysis.
Health Spending Account (HSA): The corporation can establish an HSA to cover medical expenses tax-free. This provides a corporate deduction for the expense while the lawyer receives tax-free medical coverage — a significant advantage over paying medical expenses with after-tax personal dollars.
Incorporated lawyers have significant flexibility in year-end planning that sole practitioners lack:
Comprehensive tax minimization strategies for incorporated lawyers, including income splitting and corporate structuring.
Explore Tax PlanningTransition strategies for your practice, corporate wind-down, and optimizing retirement income streams.
Explore Retirement PlanningIntegrated portfolio management that coordinates personal and corporate investments for maximum after-tax growth.
Explore Wealth ManagementEstate freezes, family trusts, and corporate wind-down strategies that integrate life insurance as the wealth transfer mechanism.
Explore Estate PlanningThe general threshold is $200,000-$250,000 in net professional income, with the ability to leave at least $50,000-$100,000 inside the corporation annually after personal expenses. Below this level, the annual costs of maintaining a corporation ($5,000-$8,000 in accounting, filing, and permit fees) may exceed the tax deferral benefit. However, other factors matter: if you anticipate rapid income growth, incorporating earlier locks in the structure before you need it. If you have significant personal debt to pay down first, delaying incorporation until debt is eliminated may be more efficient.
No. A Professional Corporation does NOT provide liability protection for professional negligence, ethical violations, or trust account issues. You remain personally liable for all professional obligations. The corporation provides limited protection only for commercial obligations (office lease defaults, employment disputes, equipment financing). Professional liability insurance remains essential regardless of corporate structure.
The Tax on Split Income (TOSI) rules significantly restrict income splitting for professional corporations. Dividends paid to family members who do not meaningfully contribute to the business are subject to the top marginal tax rate. However, legitimate employment income paid to a spouse who performs real services (bookkeeping, office management, marketing) at reasonable rates remains deductible. Careful structuring with professional tax advice is essential to comply with TOSI while maximizing legitimate family income allocation.
Upon retirement, the corporation can be wound up and assets distributed. Retained earnings are distributed as taxable dividends, while the CDA balance is distributed tax-free. Corporate-owned life insurance death benefits flow through the CDA. The wind-up process typically takes 2-3 years and should be planned well in advance of retirement to optimize the timing of dividend distributions across multiple tax years. See retirement planning for lawyers for detailed wind-up strategies.
Both — but in the right order. First, maximize RRSP contributions (tax-deductible, tax-sheltered growth). Second, maximize TFSA contributions ($7,000 for 2025). Third, invest corporate surplus inside the corporation. The RRSP and TFSA provide superior tax treatment for investment growth, but they have contribution limits. The corporation provides unlimited investment capacity but with less favourable tax treatment on passive income. The optimal strategy uses all three vehicles in a coordinated approach.
Determine whether incorporation is right for your practice and design an optimal corporate structure. Book a consultation to analyze your income, spending, and goals — then build a salary-dividend strategy that minimizes your lifetime tax burden.
Book a Consultation