Summary: With year-end approaching, October provides Canadian professional partnerships an important window to review their structure, remuneration, income splitting, retirement planning, capital purchases, and other tax moves while there is still time to act.
This article focuses on the tax strategies professional partnerships can use before December 31, from incorporation and the small business deduction to income splitting, retirement planning, and succession, while explaining the rules that can narrow or limit those options.
Why Partnership Structure Changes the Tax Playbook
For Canadian professional firms structured as partnerships, year-end tax planning starts with a basic question: who is taxed on the firm’s income? Unlike a corporation operating on its own, a partnership generally is not the taxpayer. Instead, income flows through to the partners, and whether they practise as individuals, through professional corporations, or through a combination of both determines how that income is taxed.
When your firm is structured as a partnership, it generally does not pay income tax itself.1 Its net income or loss is allocated among the partners. An individual partner reports their share personally, while a professional corporation that is a partner reports its allocated share as corporate income.
That distinction shapes almost every tax decision in your practice: the rate you pay, the deduction available to you, how you compensate yourself, and how you plan for retirement. It also determines how important rules such as the small business deduction and specified partnership income apply to your situation.
Professional corporations that are members of partnerships, and partnerships in which at least one member is an individual, professional corporation, or another affected partnership, generally report business income on a calendar-year basis.2
Because many of the moves that shape your final tax position need to happen before December 31, October becomes the planning window for your company.
To Incorporate or Not: The Professional Corporation Decision
Incorporating a professional practice can create useful tax and retirement-planning options, but it also entails additional costs, administrative work, and restrictions. The potential value depends largely on how much income you can leave in the corporation and what you want that retained capital to accomplish.
Potential benefits include:
- Tax deferral: A qualifying Canadian-controlled private corporation (CCPC) can claim the small business deduction (SBD) on eligible active business income. The federal small-business tax rate is 9%, plus applicable provincial or territorial corporate tax. By comparison, 2026 federal personal marginal tax rates range from 14% to 33%, on top of provincial or territorial tax.³, 3.1 For professional corporations earning income through a partnership, however, the specified partnership income rules can significantly restrict how much partnership income receives the lower rate.
- More cash retained in the corporation: Paying the lower corporate rate upfront can leave more after-tax cash inside the corporation for working capital, debt repayment, investment, or future retirement needs. Personal tax is generally deferred until funds are withdrawn from the corporation. If nearly all earnings must be withdrawn each year to fund personal spending, however, there is much less tax left to defer.
- More remuneration and retirement-planning options: A professional corporation can generally compensate an owner through salary, dividends, or a combination of both. Salary is earned income for Registered Retirement Savings Plan (RRSP) purposes and can also be used to support an individual pension plan (IPP).
Professional corporation rules vary by province and profession. In Ontario, for example, certain family members may own non-voting shares of physician and dentist professional corporations, while voting-share ownership remains restricted to members of the relevant profession. CPA Ontario applies a different ownership framework to accounting professional corporations.⁵, 5.1
Whether incorporation makes sense for you comes down to your specific circumstances. The advantages in tax deferral and planning flexibility are real, but so are the compliance costs, administrative burden, and the question of how much income you can actually afford to leave in the corporation.
The trade-offs include:
- Higher operating costs: A professional corporation has its own accounting, corporate tax return, legal records, and regulatory obligations. Incorporation and annual maintenance costs can reduce the benefit, particularly when little income is retained.
- More administration: The corporation requires separate bookkeeping and filings. It also needs to administer payroll, source deductions, remittances, and T4 reporting.
- Limits on family income splitting: The tax on split income (TOSI) rules can subject certain dividends and other income received by family members from a related business to tax at the highest marginal rate unless an exclusion applies.⁶ Simply issuing shares to a spouse or adult child therefore does not automatically create a tax advantage.
Ultimately, incorporation must fit your personal finances and tax plan. Household cash flow, debt obligations, and other financial commitments affect how much income you can realistically retain in the corporation. Aprio can help you weigh those current needs against the longer-term options to determine whether incorporation fits your broader financial strategy.
The Small Business Deduction Trap for Partnerships
One common mistake in a professional partnership is assuming that incorporating each partner creates a new $500,000 federal small-business limit. It does not.
For a CCPC that is a partner, the specified partnership income (SPI) rules generally limit the amount of partnership income that can qualify for the SBD. Broadly, the corporation’s SPI limit is based on its pro rata share of one notional $500,000 business limit for the partnership, rather than a separate $500,000 partnership limit for each incorporated partner.⁷
For example, if 10 professional corporations are equal partners, they would generally divide the same notional $500,000 partnership business limit. That would give each corporation an SPI limit of $50,000 from the partnership, not $500,000. Qualifying active business income earned by a corporation from other sources may still be eligible for the SBD, subject to its overall available business limit and other applicable rules.⁷
The rules can also apply where a professional’s corporation is not formally a partner but provides services or property to a partnership in which the professional has an interest. In certain circumstances, the corporation can be treated as a designated member, preventing the structure from being used simply to create additional access to the SBD.⁷
There are two other federal limits to watch:
- Passive investment income: The federal business limit begins to fall when the combined adjusted aggregate investment income of the CCPC and its associated corporations exceeds $50,000 and is phased out as that income rises to $150,000.⁸
- Taxable capital: The federal business limit is also reduced when the CCPC and its associated corporations have taxable capital employed in Canada of between $10 million and $50 million, based on the previous year. At $50 million or more, the federal SBD is unavailable.⁸
Importantly, these two reductions are not simply added together. Whichever reduction is higher applies.⁸ Provincial tax treatment can also differ. Ontario, for example, does not apply the federal passive-income business-limit reduction to its provincial small business deduction.⁹
The takeaway is that incorporation can still provide value, but the SBD advantage in a professional partnership depends on how the available limit is allocated and preserved. It cannot simply be multiplied by incorporating each partner.
Income Splitting After TOSI: What Still Works
If you were planning to share income with family members through your professional corporation, TOSI has largely closed that option. Since 2018, dividends, interest, and certain other amounts paid to family members from a related business are taxed at the top marginal rate unless a specific exclusion applies.¹⁰
Professional and service businesses face another hurdle. The “excluded shares” exception is not available to professional corporations. Even where it might otherwise apply, it requires that less than 90% of the corporation’s business income come from providing services. If you are an accountant, dentist, lawyer, physician, veterinarian, or chiropractor, both conditions work against you.⁶
While traditional dividend sprinkling has narrowed, other family tax-planning options are still available:
- Salary for genuine work: TOSI does not apply to salary. A spouse or adult child can therefore be paid for legitimate work performed for the business. The amount should be reasonable for the services provided and supported by appropriate records.¹⁰
- Active involvement: Income from a related business may fall outside TOSI when an adult family member is actively engaged in the business on a regular, continuous, and substantial basis. The CRA provides a bright-line test of an average of at least 20 hours per week during the portion of the year in which the business operates. Qualifying involvement in any five prior taxation years can also satisfy the excluded-business rule, and those five years need not be consecutive.¹⁰
- Reasonable return: For an individual aged 25 or older, an amount may also qualify as an excluded amount where it represents a reasonable return based on factors such as work performed, property contributed, and risks assumed. This can be particularly relevant to professional corporations because the excluded-shares exception itself is not available to them.¹⁰
- Age-65 spouse rule: Additional relief may be available where one spouse or common-law partner is at least 65, and the amount would have been an excluded amount if it had been received by that spouse.¹⁰
- Spousal RRSP: This is not a TOSI exception, but contributing to a spouse’s RRSP can help balance taxable retirement income later. Contributions use the contributor’s RRSP deduction limit. Withdrawal-attribution rules must also be considered, particularly where contributions were made in the year of withdrawal or either of the two preceding years.¹¹
A prescribed-rate loan can also be used, in appropriate circumstances, to lend investment capital to a lower-income spouse, provided the legal requirements are met. The applicable rules require that interest be charged at no less than the prescribed rate when the loan is made, and that the interest be paid within 30 days after the end of each year.¹²
Does TOSI Apply to Me? A Quick Test
1. Are you being paid salary for work you perform?
If yes, TOSI does not apply to salary. The amount should still be reasonable for the work performed if the business is claiming a deduction.
2. Are you receiving income from a related business?
Certain dividends, interest, partnership or trust income, and capital gains may be subject to TOSI unless an exclusion applies.
3. Do you work regularly in the business?
If you average at least 20 hours per week while the business operates, you are deemed actively engaged. The exclusion can also apply if you met the test in any five previous years.
4. Are you 25 or older?
You may qualify for the reasonable-return exception based on factors such as your work, property contributions, and risks assumed. For professional corporations, the separate excluded-shares exception is not available.
5. Are you between 18 and 24?
The exceptions are narrower. An excluded business can still qualify, along with certain returns on safe-harbour capital or arm’s-length capital.
6. Is your spouse or common-law partner 65 or older by year-end?
Special relief may apply if the income would have been excluded from TOSI had your spouse or partner received it.
The takeaway: If you receive non-salary income from a related business and no exclusion applies, TOSI may apply. Your age, involvement in the business, source of the income, and how the payment is structured all matter.
Retirement, Remuneration, and Year-End Levers
Year-end tax planning also affects how much you build for retirement and what you keep when you eventually leave your profession. If you are incorporated and earn substantial employment income, an IPP may be worth considering. Under CRA rules, an IPP is a defined-benefit pension your corporation funds and deducts, with contribution room tied to your years of service and salary history. For older, high-earning incorporated partners, it can shelter significantly more than an RRSP.⁴
That makes your salary-versus-dividend mix one of the more consequential decisions you make each year. Salary builds the earned income used to calculate future RRSP deduction room and generally creates pensionable earnings for Canada Pension Plan (CPP) purposes. Dividends do not create RRSP room and generally do not attract CPP or Quebec Pension Plan contributions.¹³, 13.1 The right mix depends on your cash needs, other income, province of residence, and retirement goals.
An eventual sale is worth planning for before you need to. Canada’s general capital gains inclusion rate remains 50% after the federal government decided not to proceed with the proposed increase.¹⁴ The Lifetime Capital Gains Exemption (LCGE) has a $1.25 million base, with indexation resuming in 2026. With the 2026 federal indexing factor at 2.0%, the LCGE is $1.275 million for 2026 on qualifying property, including qualifying small-business corporation shares.¹⁵, 15.1
However, the exemption is not automatic. Your shares must meet specific conditions, including tests covering the corporation’s assets and ownership during the 24 months before the sale.¹⁶ Planning ahead matters because some eligibility problems cannot be fixed just before closing.
One more thing to plan for: large gains or an LCGE claim trigger alternative minimum tax (AMT). The revised federal AMT rate is 20.5%, though any excess AMT you pay can generally be carried forward for up to seven years and applied against regular federal tax when the conditions are met.¹⁷
Year-End Tax-Planning Checklist for Professional Partnerships
Before December 31, work through these questions:
- Remuneration: Finalize your salary and dividend decisions and review any year-end remuneration accruals. If salary, wages, or other employment remuneration remain unpaid 180 days after the end of the taxation year, you generally cannot deduct them as an expense for that earlier year.¹⁸
- Capital purchases: If capital cost allowance (CCA) forms part of your year-end plan, consider when any equipment or other depreciable property you purchase will become available for use. You can usually begin claiming CCA when the property becomes available for use.¹⁹
- Prescribed-rate loans: If you are setting up a new prescribed-rate loan, confirm the rate that applies when the loan is made and make sure the required interest is paid within 30 days after each calendar year-end.¹²
- Sale readiness: If you may sell shares of your corporation in the future, review your eligibility for the LCGE well before negotiations begin. Some qualifying-share tests look back 24 months, so you may not be able to fix certain eligibility issues immediately before a sale.¹⁶
- Retirement income: If you receive eligible pension income, check whether you can split it with your spouse or common-law partner. You may be able to jointly elect to allocate up to 50% of eligible pension income to your spouse or partner.²⁰
The strongest year-end plan considers these decisions together rather than one at a time.
Final Thoughts: Build a Smarter Year-End Tax Strategy
Tax planning for a professional partnership rarely comes down to a single decision. Incorporation, the small business deduction, income splitting, remuneration, retirement funding, and eventual succession can all affect one another. The right approach depends on how your firm is structured, how much income you need personally, and what you want your business to support over time.
With December 31 fast approaching, reviewing these decisions early gives you more time and flexibility to act. A well-planned approach can help you preserve available tax advantages, manage cash flow, and keep your personal and business goals moving in the same direction.
References
¹ Canada Revenue Agency, “Reporting Partnership Income” https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partnerships/t5013-partnership-information-return-filing-requirements/reporting-partnership-income.html/1000
² Canada Revenue Agency, “Fiscal Period for Income Tax Purposes” https://www.canada.ca/en/revenue-agency/services/tax/businesses/small-businesses-self-employed-income/business-income-tax-reporting/fiscal-period-income-tax-purposes.html
³ Canada Revenue Agency, “Corporate Tax Rates” https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/corporation-tax-rates.html
3.1 Canada Revenue Agency, “Payroll Deduction Table” https://www.canada.ca/en/revenue-agency/services/forms-publications/payroll/t4032-payroll-deductions-tables/t4032oc-jan/t4032oc-january-general-information.html
⁴ Canada Revenue Agency “Registered Pension Plans Glossary” https://www.canada.ca/en/revenue-agency/services/tax/registered-plans-administrators/registered-pension-plans-glossary.html
⁵ Ontario, Ontario Regulation 665/05 https://www.ontario.ca/laws/regulation/050665
5.1 CPA Ontario, Registration Guideline https://www.cpaontario.ca/members/regulations-guidance/accounting-firms/register-firm/professional-corporations/register-with-cpa-ontario
⁶ Canada Revenue Agency, “Tax on Split Income” https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/federal-government-budgets/income-sprinkling/guidance-split-income-rules-adults/excluded-shares.html
⁷ Canada Revenue Agency, “Corporation Income Tax Guide Chapter 4 — Specified Partnership Income https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4012/t2-corporation-income-tax-guide-chapter-4-page-4-t2-return.html
⁸ Canada Revenue Agency, T2 Corporation Income Tax Guide, Chapter 4 — Small Business Deduction Limits https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4012/t2-corporation-income-tax-guide-chapter-4-page-4-t2-return.html
⁹ Canada Revenue Agency, “Provincial Territorial Corporation Tax” https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/provincial-territorial-corporation-tax/ontario-provincial-corporation-tax/ontario-small-business-deduction.html
¹⁰ Canada Revenue Agency, “Guidance on Split Income Rules” https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/federal-government-budgets/income-sprinkling/guidance-split-income-rules-adults.html
¹¹ Canada Revenue Agency, “Withdrawing from Spousal or Common Law Partners” https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans/making-withdrawals/withdrawing-spousal-common-law-partner-rrsps.html
¹² Canada, Income Tax Act, R.S.C. 1985, c. 1 (5th Supp.), sections 74.5(1) and 74.5(2) https://laws-lois.justice.gc.ca/eng/acts/I-3.3/section-74.5.html
Canada Revenue Agency, “Prescribed Interest Rates” https://www.canada.ca/en/revenue-agency/services/tax/prescribed-interest-rates.html
¹³ Canada Revenue Agency, “Definitions: Registered Retirement Savings Plan (RRSPs)” https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/rrsps-related-plans/definitions-rrsps.html
13.1 https://www.canada.ca/en/services/benefits/publicpensions/cpp/contributions.html
¹⁴ Canada Revenue Agency, “Report on Federal Tax Expenditures” https://www.canada.ca/en/department-finance/services/publications/federal-tax-expenditures/2026/part-6.html
¹⁵ Department of Finance Canada, “Lifetime Capital Gains Exemption — 2026 Indexed Amount” https://www.canada.ca/en/department-finance/corporate/transparency/briefing-materials/2026/c15-eng.html
15.1 Canada Revenue Agency “Income Tax Rates and Income Thresholds” https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/payroll/payroll-deductions-contributions/income-tax/reducing-remuneration-subject-income-tax.html
¹⁶ Canada Revenue Agency, “Capital Gains” https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4037/capital-gains.html
¹⁷ Department of Finance Canada, Budget Implementation Act, 2024, No. 1 — Revised Alternative Minimum Tax https://www.canada.ca/en/department-finance/corporate/transparency/2024/nffn-part-3.html
¹⁸ Canada, Income Tax Act, R.S.C. 1985, c. 1 (5th Supp.), section 78 https://laws-lois.justice.gc.ca/eng/acts/I-3.3/section-78.html
¹⁹ Canada Revenue Agency, “Self-employed Business, Professional, Commission, Farming and Fishing Income” https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4002/t4002-6.html
²⁰ Canada Revenue Agency, “Pension Income Splitting” https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/pension-income-splitting.html
21 Aprio “Professional Services” https://www.aprio.com/professional-services/
22 Aprio “Business Tax” https://www.aprio.com/business-tax/
