Navigating the Tax on Split Income (TOSI) Rules for Canadian Family-Owned Businesses

Income Splitting After TOSI — What Every Family-Owned Enterprise Must Understand

For decades, income splitting was one of the most powerful planning tools available to Canadian family-owned businesses. When structured properly, allocating dividends, capital gains, or trust income among family members could reduce overall tax exposure, support succession planning, and accelerate intergenerational wealth transfer.

That landscape changed fundamentally in 2018.

With the expansion of section 120.4 of the Income Tax Act — the Tax on Split Income (TOSI) regime — Parliament redrew the boundaries of what constitutes legitimate income splitting. The revised rules did not eliminate planning opportunities. They eliminated careless planning.

Today, dividends, shareholder benefits, certain capital gains, trust allocations, and partnership income may be taxed at the highest marginal rate unless the recipient satisfies one of several tightly defined statutory exclusions. The analysis is no longer informal. It is legislative, fact-driven, and highly technical.

In my practice advising Canadian family-owned enterprises, I routinely see business structures built on pre-2018 assumptions — assumptions that no longer withstand scrutiny under section 120.4. Income allocated to adult children, spouses, or family trusts must now pass specific statutory tests: excluded business, excluded shares, reasonable return, or defined spousal and estate exceptions. Documentation, governance, and corporate structuring are no longer administrative formalities; they are defensive tax planning tools.

The modern income splitting conversation is not about whether planning is still possible. It is about whether the planning is defensible.

For families operating private corporations, professional practices, real estate groups, farming operations, or multi-entity holding structures, understanding the precise mechanics of TOSI is now essential to:

• Designing dividend strategies
• Implementing estate freezes
• Structuring intergenerational share transfers
• Allocating trust income
• Planning for retirement and succession
• Preserving capital gains exemptions

This article provides a structured and technical examination of the modern TOSI framework under section 120.4, including its historical development, statutory exclusions, interaction with family business structures, and strategic planning considerations for Canadian private corporations.

Income splitting is no longer a casual tax tactic. It is a discipline.

Tell us your ambitions, and we will guide you there.

 

Historical Context and the Evolution of TOSI

The Beginnings of Income Splitting

Income splitting has been a significant component of Canadian tax planning since the early 20th century. Initially introduced in the Income and War Tax Act of 1917, the original attribution rules aimed to regulate the transfer of income within families to ensure equitable tax distribution. Sir Thomas White, the then Minister of Finance, emphasized during the House of Commons debates that the rules were designed to prevent the evasion of taxes through the transfer of property among family members. Section 4(4) of the Act specifically targeted income-splitting strategies that were used to exploit individual tax exemptions, which at the time allowed the first $3,000 of income to be tax-free. By transferring property within a family, multiple members could potentially utilize their tax exemptions on the same income source, drastically reducing the family’s overall tax burden.

Challenges and Responses

Over the years, taxpayers and tax planners found creative ways to circumvent these rules, particularly through lending properties and forming corporate structures. A landmark case was Dunkelman v. MNR in 1959, where the court decided that a loan of property to family members did not constitute a transfer or assignment for attribution purposes. This ruling opened the door for income to be earned and reported by family members as if they were independent property owners, sidestepping the attribution rules.

In response to these strategies, legislative changes were made to strengthen the attribution rules. The 1952 Act revised the attribution provisions to include indirect transfers and loans of property. This was further tightened by introducing specific provisions under sections 74.1 to 74.5 of the Income Tax Act, which aimed to close loopholes that allowed income to be shifted within families through sophisticated lending and property transfer schemes.

The Introduction of TOSI

Despite these legislative efforts, the ability to split income within families continued to present challenges to the fairness and integrity of the tax system. This led to the introduction of the Tax on Split Income (TOSI) rules in 1999, initially targeted at income splitting with minors (often referred to as the “kiddie tax”). Section 120.4 of the Income Tax Act was crafted to apply the highest marginal tax rates to certain types of split income received by individuals under 18 years of age.

The rationale behind TOSI was clear: to deter high-income earners from shifting a portion of their income to family members in lower tax brackets, particularly minors, who had little to no other income. This was a direct response to the persistent use of income-splitting tactics that undermined the progressivity of the tax system. The TOSI rules were intended to ensure that similar amounts of income are taxed similarly, regardless of the techniques used to allocate that income within a family.

However, TOSI’s scope expanded significantly with the 2018 amendments, which brought adults into the fold under certain conditions. These changes were a culmination of ongoing observations that despite various reforms, income splitting remained a potent tax planning tool, particularly for family-owned businesses where control and ownership could be diffused among several family members. The 2018 amendments aimed to refine and extend the rules to prevent income splitting practices that did not correspond to genuine contributions to business activities, thereby reinforcing the principles of tax fairness and equity.

These historical shifts in the tax landscape reflect a continuous dialogue between tax planning strategies and legislative responses, where each adjustment in rules prompts a reevaluation of planning approaches. The evolution of TOSI is a testament to the complexity of balancing legitimate family business arrangements with the need to maintain a fair and equitable taxation system.

 

Technical Legislative Interpretation of Section 120.4 – Tax on Split Income (TOSI)

A proper understanding of the Tax on Split Income (TOSI) requires returning to the statutory language itself. Section 120.4 of the Income Tax Act (ITA) is not a general anti-avoidance rule. It is a highly structured computational regime that overlays the ordinary tax calculation where “split income” is present.

1. Structural Framework of Section 120.4

Section 120.4 operates in three analytical stages:

1. Determine whether the individual has “split income.”
2. Determine whether that income is “excluded amount.”
3. If not excluded, impose tax at the highest marginal rate.

The statute is mechanical. If income meets the definition of “split income” and fails to qualify as an “excluded amount,” the tax consequence is automatic.

 

Step 1: What Is “Split Income”?

The definition of “split income” in subsection 120.4(1) is intentionally broad. For adult individuals (post-2018 expansion), it generally includes:

• Taxable dividends and shareholder benefits from private corporations
• Income from partnerships or trusts derived from a related business
• Certain interest income from related party arrangements
• Taxable capital gains from the disposition of certain private corporation shares (including gains recharacterized under section 120.4(3))
• Income allocated from a family trust that earns business or property income from a related business

A “related business” is defined expansively and includes a business carried on by:

• A related individual, or
• A corporation, partnership, or trust in which a related individual has a significant ownership interest.

This related business concept is the engine of the TOSI regime. It ties income not only to ownership, but to family economic connection.

 

Step 2: The “Excluded Amount” Analysis

Once income is characterized as split income, the analysis shifts to whether it qualifies as an “excluded amount.” This is where most planning either succeeds or fails.

The statute provides several exclusions.

(a) Excluded Business

An amount derived from an “excluded business” is not subject to TOSI.

A business is excluded for a particular individual if the individual is:

Actively engaged on a regular, continuous, and substantial basis in the activities of the business.

The Canada Revenue Agency has administratively accepted that working an average of 20 hours per week during the portion of the year the business operates generally satisfies this test. However, this is not a statutory safe harbour — it is administrative guidance.

The key elements are:

• Ongoing involvement
• Operational participation
• Demonstrable contribution

Passive oversight is insufficient.

 

(b) Excluded Shares

For individuals age 25 or older, dividends (and certain capital gains) from “excluded shares” are not subject to TOSI if:

1. The individual owns shares representing at least 10% of both:
   • Votes, and
   • Value of the corporation
2. Less than 90% of the corporation’s business income is derived from the provision of services.
3. The corporation is not a professional corporation.

The professional corporation restriction is critical. Physicians, lawyers, accountants, and other regulated professionals typically cannot rely on the excluded shares exception.

This is a structural legislative limitation — not a drafting oversight.

 

(c) Reasonable Return

If income does not qualify as excluded business or excluded shares, it may still escape TOSI if it constitutes a “reasonable return.”

Subsection 120.4(1) defines reasonable return with reference to:

• Work performed
• Property contributed
• Risks assumed
• Total amounts previously paid
• Such other factors as may be relevant

For individuals aged 18–24, the reasonable return analysis is significantly constrained. The statute limits the return primarily to a prescribed rate of return on contributed capital, unless the business is inherited or certain exceptions apply.

The reasonable return test is inherently factual and requires documentation. It is not formulaic. It is evidentiary.

 

(d) Excluded Amounts for Spouses Age 65+

An amount received by an individual is excluded if:

• The amount would not have been subject to TOSI if received by their spouse or common-law partner, and
• That spouse is age 65 or older.

This provision harmonizes TOSI with pension income splitting principles and reflects Parliament’s policy choice to permit retirement-stage income flexibility.

 

(e) Inherited Property

The Act provides a special deeming rule where property is inherited from a deceased parent.

In such cases, the recipient may be treated as if they were the deceased for purposes of applying certain TOSI exclusions.

This rule is often misunderstood. It does not create blanket immunity from TOSI. It allows the inheriting individual to step into the shoes of the deceased for exclusion analysis.

 

Step 3: Tax Consequence

If income is split income and not excluded:

• The amount is taxed at the top marginal rate.
• No personal tax credits (other than dividend tax credit) may reduce the TOSI liability.
• The tax is calculated separately under section 120.4(2).

This effectively eliminates the marginal rate benefit that income splitting was designed to achieve.

 

Capital Gains Under TOSI

A critical but often overlooked provision is subsection 120.4(3), which may deem certain capital gains to be split income.

Where a capital gain arises from the disposition of shares of a private corporation and the gain would not qualify as an excluded amount, TOSI may apply.

This provision intersects with:

• Section 84.1 (non-arm’s length share transfers)
• Section 55 (intercorporate dividend anti-avoidance)
• Estate freeze transactions
• Intergenerational business transfers under Bill C-208 and Bill C-59 amendments

Practitioners must evaluate TOSI exposure in tandem with surplus stripping and succession planning rules.

 

Legislative Intent and Policy Interpretation

The 2018 amendments were designed to:

• Curtail income sprinkling not supported by economic contribution.
• Preserve income flexibility for genuine family business participants.
• Protect tax base integrity without dismantling legitimate succession planning.

The regime is anti-abuse in design but rule-based in execution.

Unlike the General Anti-Avoidance Rule (GAAR), section 120.4 does not require misuse or abuse analysis. It is applied mechanically based on statutory thresholds.

That mechanical nature makes technical structuring paramount.

 

Practical Legislative Observations for Advisors

From a statutory interpretation perspective:

1. TOSI is ownership-sensitive and relationship-sensitive.
2. The regime relies heavily on factual contribution analysis.
3. Professional corporations face structural limitations under excluded shares.
4. Trust planning requires careful tracing of related business income.
5. Capital gains planning must be integrated with 84.1 and succession reforms.

Income splitting has not been eliminated. It has been codified.

The advisors who succeed under this regime are those who design structures that satisfy the statute — not those who rely on historical practice.

 

Understanding Section 120.4 of the Income Tax Act: The Modern TOSI Framework

Since the 2018 amendments, section 120.4 of the Income Tax Act has fundamentally altered the mechanics of income splitting for Canadian private corporations. What was once a commonly used dividend sprinkling strategy is now subject to a structured statutory analysis.

TOSI is no longer a policy discussion. It is a technical exercise.

At its core, section 120.4 asks two questions:

1. Is the amount “split income”?
2. If so, does it qualify as an “excluded amount”?

If the answer to the first is yes and the second is no, the income is taxed at the highest marginal rate — regardless of the recipient’s actual income bracket.

 

Scope of TOSI: What Constitutes “Split Income”?

The definition of split income under subsection 120.4(1) is deliberately expansive and captures income connected to a “related business.” In practice, this often includes income derived from family-controlled private corporations, partnerships, and trusts.

Split income may include:

• Taxable dividends and shareholder benefits received from private corporations where a related individual is actively engaged in the business.
• Partnership or trust income derived directly or indirectly from a related business.
• Interest income from certain related-party lending structures.
• Taxable capital gains on shares of private corporations, including gains that may be recharacterized under subsection 120.4(3).

The operative concept is the “related business.” If a related individual is materially involved in the business, the income received by other family members may fall within TOSI — even if those recipients are adult shareholders.

This relationship-based structure is what makes TOSI particularly relevant for family-owned enterprises.

 

Key Exclusions Under Section 120.4

The planning opportunity lies not in avoiding TOSI, but in properly qualifying for one of its statutory exclusions.

1. Excluded Business

An amount is excluded if it is derived from an “excluded business” of the individual.

To qualify, the individual must be actively engaged on a regular, continuous, and substantial basis in the business during the year (or in any five prior taxation years).

While CRA administrative guidance often references an average of 20 hours per week during operating periods, the statutory test is qualitative, not mechanical. Documentation of duties, operational involvement, and decision-making authority is critical.

Passive ownership does not satisfy this test.

 

2. Excluded Shares

For individuals aged 25 or older, dividends and certain capital gains may qualify as excluded if received on “excluded shares.”

To meet this exception:

• The individual must own at least 10% of both the votes and value of the corporation;
• Less than 90% of the corporation’s business income must be derived from the provision of services;
• The corporation must not be a professional corporation.

The professional corporation restriction is significant. Many regulated professional practices — including medical, legal, and accounting firms — cannot rely on this exclusion.

Structural share design matters.

 

3. Reasonable Return

Where neither excluded business nor excluded shares apply, income may still avoid TOSI if it represents a “reasonable return.”

The Act requires consideration of:

• Work performed
• Property contributed
• Risks assumed
• Total compensation previously received
• Any other relevant factor

For individuals aged 18 to 24, the reasonable return analysis is significantly restricted, generally limiting returns to a prescribed rate on contributed capital unless specific inheritance exceptions apply.

Reasonableness is evidentiary. It must be defensible.

 

4. Spousal and Retirement Exemptions

An amount received by an individual is excluded if:

• Their spouse or common-law partner is age 65 or older; and
• The amount would not have been subject to TOSI if received directly by that spouse.

This aligns TOSI with pension income splitting principles and reflects Parliament’s intention to preserve retirement-stage income flexibility.

 

5. Inherited Property

Section 120.4 provides special rules for property inherited from a deceased parent.

In certain circumstances, the beneficiary may be treated as if they were the deceased for purposes of applying specific TOSI exclusions. This is not a blanket exemption, but a statutory deeming mechanism that requires careful analysis.

The inheritance exception is frequently misunderstood and should be evaluated in conjunction with succession and estate freeze planning.

 

Why This Matters for Family-Owned Enterprises

For Canadian private corporations — particularly those implementing:

• Estate freezes
• Family trusts
• Intergenerational share transfers
• Dividend planning strategies
• Capital gains exemption planning

— TOSI must be analyzed before distributions are declared, not after.

The modern income splitting framework is statutory, evidence-based, and unforgiving of informal arrangements.

The planning opportunity remains.
But it must be structured with precision.

 

Practical Tool: The TOSI Flow Chart

To aid tax planners and affected taxpayers, a TOSI Flow Chart has been developed as a practical tool to assess potential TOSI implications. This flow chart helps tax professionals determine whether specific income types are subject to TOSI and if any of the outlined exemptions apply. It serves as a step-by-step guide through the complexities of TOSI, offering visual assistance in identifying permissible income sprinkling opportunities and ensuring compliance with the law.

The flow chart begins by identifying the type of income and proceeds to question the relationship of the individuals involved, their level of engagement in the business, and whether any exceptions, like reasonable return or excluded shares, might apply. It simplifies decision-making, ensuring that tax planning remains within legal boundaries while optimizing tax outcomes.

The revised TOSI rules represent a significant shift in how family income is taxed in Canada, aiming to ensure tax equity and fairness across different income levels within families. Understanding these rules—particularly the scope of what income is covered, the exclusions available, and practical tools like the TOSI Flow Chart—is essential for tax professionals working with family-owned businesses. By navigating these rules effectively.

 

TOSI Flow Chart

 

TOSI, Section 84.1, and Bill C-59: The Critical Intersection in Intergenerational Business Transfers

For Canadian family-owned enterprises, the interaction between section 120.4 (TOSI) and section 84.1 — particularly following the intergenerational transfer reforms introduced under Bill C-208 and refined by Bill C-59 — is where tax planning becomes highly technical.

Most advisors analyze these provisions in isolation.

That is a mistake.

Proper succession planning requires understanding how these rules operate together.

 

Section 84.1: The Surplus-Stripping Gatekeeper

Section 84.1 is an anti-avoidance rule designed to prevent an individual from converting corporate surplus into capital gains through non-arm’s length share transfers.

In a typical intergenerational sale:

• A parent sells shares of Opco to a corporation controlled by their child.
• Without proper structuring, section 84.1 may:
  • Recharacterize part of the proceeds as a dividend, or
  • Grind paid-up capital (PUC).

Historically, this created a tax asymmetry:

• Sale to a third party → capital gain (potentially eligible for the Lifetime Capital Gains Exemption under section 110.6).
• Sale to a child’s corporation → possible deemed dividend under 84.1.

Bill C-208 (2021) and subsequent refinements under Bill C-59 (2023) sought to address this inequity by creating structured pathways for genuine intergenerational transfers.

However, compliance with 84.1 does not end the analysis.

TOSI must still be considered.

 

Where TOSI Enters the Conversation

Even where a transfer qualifies under the revised 84.1 intergenerational rules, TOSI may still apply in several circumstances:

1. Dividend Payments Post-Transfer
2. Capital Gains Realizations
3. Trust Allocations in Freeze Structures
4. Hybrid Sale-Freeze Transactions

TOSI does not disappear merely because an intergenerational transfer qualifies under 84.1.

The regimes serve different purposes:

• Section 84.1 governs surplus extraction mechanics.
• Section 120.4 governs income allocation fairness within families.

Both must be satisfied.

 

Scenario 1: Sale to Child’s Corporation Followed by Dividends

Assume:

• Parent sells shares of Opco to Child Holdco under compliant Bill C-59 intergenerational rules.
• Parent claims the LCGE.
• Child Holdco now owns Opco.
• Opco pays dividends to family shareholders, including siblings or spouses.

If those dividend recipients:

• Are not actively engaged in the business, and
• Do not qualify under excluded shares or reasonable return,

TOSI may apply.

The fact that the original transfer complied with section 84.1 does not shield subsequent distributions from TOSI scrutiny.

Succession is a transaction.
TOSI is an ongoing regime.

 

Scenario 2: Estate Freeze and Family Trust Planning

In many family enterprises, succession is structured through:

• An estate freeze
• Issuance of new growth shares
• Subscription by a discretionary family trust

Following Bill C-59, the sale pathway under 84.1 may be more attractive in some cases.

However, freeze planning remains common.

Where a trust allocates dividends from Opco to:

• Adult children not active in the business,
• University-aged beneficiaries,
• Spouses not contributing to operations,

TOSI becomes the primary risk analysis.

In these cases:

• The trust allocation may be “split income.”
• Excluded business may not apply.
• Excluded shares often fails because trust beneficiaries do not directly meet the 10% vote and value test.
• Reasonable return must be substantiated.

Intergenerational planning without TOSI modeling is incomplete.

 

Scenario 3: Hybrid Sale-Freeze Structures

Sophisticated reorganizations may involve:

• Partial sale under 84.1 intergenerational rules
• Partial estate freeze
• Redemption of preferred shares
• Use of promissory notes
• Gradual control transfer

In these hybrid structures:

• Capital gains must be evaluated under both 84.1 and 120.4(3).
• Dividend streams must be evaluated under excluded business and reasonable return tests.
• Future buy-outs among siblings must consider TOSI exposure.

This is where technical integration matters.

 

Bill C-59 Refinements: What Changed

Bill C-59 introduced structured pathways for intergenerational transfers, including:

• Immediate transfer model
• Gradual transfer model
• Minimum holding period requirements
• Active involvement requirements
• Extended reassessment periods
• Required affidavits and certifications

These amendments focus on ensuring the transfer is genuine.

But they do not override TOSI.

Instead, they raise the evidentiary standard for demonstrating:

• Ongoing business involvement
• Economic continuity
• Authentic succession

Ironically, the same factual evidence required to satisfy Bill C-59 often becomes relevant in defending against TOSI.

 

Capital Gains and TOSI Under Subsection 120.4(3)

A frequently overlooked provision is subsection 120.4(3), which may deem certain capital gains to be split income.

In an intergenerational transfer context, consider:

• Post-freeze redemption of preferred shares
• Sale of growth shares by non-active siblings
• Internal reorganizations among family corporations

If the gain does not qualify as an excluded amount, TOSI may apply — even if 84.1 does not.

The capital gains exemption does not automatically immunize against TOSI characterization.

This is where planning discipline is essential.

 

Strategic Observations for Advisors

When advising on intergenerational transfers, the analysis should proceed in this order:

1. Section 84.1 Analysis
   • Is the transfer compliant?
   • Is there a dividend recharacterization risk?
   • Is PUC ground down?
2. LCGE Eligibility (Section 110.6)
   • Does the corporation meet QSBC criteria?
   • Is purification required?
3. TOSI Modeling
   • Will future dividends trigger TOSI?
   • Do beneficiaries qualify under excluded business?
   • Does excluded shares apply?
   • Can reasonable return be defended?
4. Ongoing Governance Planning
   • Document active involvement.
   • Align compensation with contribution.
   • Structure share classes intentionally.

Most planning failures occur at Step 3.

 

The Integrated Reality

Section 84.1 determines whether the transfer is treated as capital or dividend.

Section 120.4 determines whether subsequent income allocation is respected.

Bill C-59 ensures the transfer is authentic.

Taken together, these rules require:

• Intentional structuring,
• Evidence-based documentation,
• Long-term governance discipline.

Intergenerational succession is no longer a transactional event.
It is a multi-year compliance framework.

 

What Income Can Still Be Split With Family Members?

A Post-2018 and Post-C-59 Reality Check

A common misconception is that income splitting was eliminated in 2018.

It was not.

What changed is the type of income, the source of income, and the relationship to a “related business.”

The modern question is no longer:

“Can we split income?”

The correct question is:

“Is this income connected to a related business under section 120.4?”

If it is not connected to a related business, TOSI may not apply at all.

Let us examine this carefully.

 

1. Income Connected to a Related Business

TOSI only applies where income is derived directly or indirectly from a related business.

A related business exists where:

• A related individual is actively engaged in the business; or
• A related person owns a significant interest in the entity carrying on the business.

If income flows from that business, the default assumption should be that TOSI analysis is required.

This typically captures:

• Dividends from family operating companies
• Trust allocations sourced from an operating company
• Interest on loans to a family business
• Capital gains on shares of a private operating company

This is the classic income sprinkling scenario.

 

2. What About Second-Generation Investment Income?

This is where nuance matters.

If an individual receives income from a holding company or investment corporation, the key question becomes:

Is that income traceable to a related business?

If a Holdco earns:

• Interest income from arm’s-length investments
• Portfolio dividends from public companies
• Capital gains on publicly traded securities
• Rental income from passive real estate not connected to a related business

TOSI generally does not apply — because the income is not derived from a related business.

However, caution is required.

If the Holdco’s investment capital originated from:

• Dividends paid by a related operating company, or
• Surplus extracted from a related business,

TOSI can still apply if the investment income is considered to be derived “directly or indirectly” from that related business.

This tracing principle is often overlooked.

Second-generation investment income is not automatically safe.

The analysis depends on:

• Source of capital
• Ownership structure
• Ongoing connection to the related business
• Whether the recipient qualifies under excluded business or excluded shares

 

3. Pure Investment Corporations (No Related Business)

Where a family establishes an investment corporation that:

• Has no operating business,
• Has no related person carrying on an active business,
• Holds only passive portfolio investments,

TOSI generally does not apply.

Why?

Because there is no related business.

Income splitting through dividends from a pure family investment corporation may still be viable, subject to:

• Attribution rules (sections 74.1–74.5)
• Corporate integration mechanics
• General anti-avoidance considerations

This is an important distinction.

TOSI targets income from active businesses connected to related persons.
It does not eliminate all dividend planning.

 

4. Rental Real Estate

Rental income requires careful classification.

If real estate is:

• Held passively,
• Not integrated with a related operating business,
• Not structured to convert active business income into passive income,

TOSI may not apply.

However, if real estate is:

• Used by a related operating company,
• Integrated into a family development enterprise,
• Structured as part of a business group,

The related business definition may be engaged.

This is fact-sensitive.

 

5. Capital Gains

Capital gains can be split, but only where they qualify as excluded amounts.

Capital gains on:

• Publicly traded securities
• Pure passive investments
• Assets not connected to a related business

Generally fall outside TOSI.

Capital gains on:

• Private company shares
• Freeze growth shares
• Trust-held business shares

Require full TOSI analysis under subsection 120.4(3).

 

6. Income to Minor Children

For individuals under age 18:

• Most dividends from private corporations remain subject to TOSI (the original “kiddie tax” rules).
• Investment income from public securities or non-related business sources may not trigger TOSI, but attribution rules often apply.

Minor income splitting remains highly restricted.

 

7. Income to Adult Children (18–24)

This is the most constrained demographic under TOSI.

For individuals aged 18 to 24:

• Excluded shares does not apply.
• Reasonable return is limited.
• Capital contributions must be genuine.
• Returns are generally limited to a prescribed rate unless inherited property rules apply.

Dividend sprinkling to university-aged children is rarely defensible without meaningful capital contribution or active engagement.

 

8. Income to Adult Children (25+)

For individuals 25 and older, planning flexibility improves significantly:

• Excluded shares may apply.
• Reasonable return is broader.
• Excluded business may apply.
• Second-generation investment income may be viable if not derived from a related business.

This is where structured governance and ownership design matter most.

 

9. Family Trust Planning

Trusts are not prohibited.

But they are no longer casual income allocation vehicles.

If a trust receives dividends from an operating company and allocates them to beneficiaries:

• Each beneficiary must independently satisfy an exclusion.
• The trust itself does not “solve” TOSI.
• The analysis is performed at the beneficiary level.

Trust planning remains viable — but only when integrated with excluded business, excluded shares, or reasonable return frameworks.

 

10. Practical Summary: What Can Still Be Split?

Income that may still be split includes:

• Dividends from a pure investment corporation not connected to a related business
• Portfolio investment income
• Public market capital gains
• Income to family members actively engaged in the business
• Dividends on excluded shares
• Reasonable returns supported by evidence
• Retirement-stage spousal income (65+)

Income that is high-risk under TOSI includes:

• Dividends from family operating companies to passive family members
• Trust allocations of operating company income
• Capital gains on private company shares to non-active beneficiaries
• Dividend sprinkling to adult children aged 18–24

 

The Strategic Reality for Family-Owned Enterprises

Income splitting is no longer about distributing dividends to minimize marginal rates.

It is about designing:

• Ownership structures
• Governance frameworks
• Capital contribution records
• Active participation documentation
• Succession pathways

Second-generation investment income can still be structured efficiently — but only when the connection to a related business is carefully analyzed and, where necessary, severed.

The modern advisor must ask:

Is this income economically independent of the operating business?

If yes, planning may remain viable.
If no, section 120.4 must be satisfied.

 

Case Studies and Examples: Strategic Application of TOSI Rules in Family Business Arrangements

The complexities of the TOSI (Tax on Split Income) rules necessitate a clear understanding through real-world applications. Below, we explore three hypothetical case studies based on the types of scenarios that Shajani CPA often encounters. These examples illustrate how TOSI can apply to different income types and family business structures, and they demonstrate strategic approaches to income splitting that comply with the revised rules.

Case Study 1: The Tech Start-Up Transition

Scenario: A couple, John and Linda, own a successful tech start-up. As they plan for retirement, they want to transfer shares to their adult children, Emily and Mark, who have been actively involved in the business.

Application: Shajani CPA advised structuring the transfer of shares to qualify as “excluded shares” under TOSI rules. This involved ensuring that the shares represented more than 10% of the votes and value of the company. Both Emily and Mark had been actively engaged in the business, averaging more than 20 hours per week, satisfying the requirements to avoid TOSI on dividends received from these shares.

Analysis: This scenario is an ideal example of leveraging the “excluded shares” exemption. By carefully planning the share structure and documenting the active involvement of Emily and Mark, the family could effectively transfer wealth without triggering TOSI.

Case Study 2: Diversified Family Farm

Scenario: The Brown family owns a large farming operation that also generates substantial income from a side business of processing organic goods. The family wants to split income among the family members, including their children over 18 who are not actively involved in the business.

Application: Shajani CPA focused on the “reasonable return” principle for the children, who had previously contributed significantly to the capital investment in the processing business. The dividends distributed to the children were structured to reflect a reasonable return on their investment contributions, calculated based on a standard industry rate of return.

Analysis: This case shows the importance of the “reasonable return” exemption in TOSI, which allows income splitting where the income amounts are justifiable based on the individual’s contribution to the business. Detailed documentation of the initial capital contributions and a clear method for calculating returns were key to compliance.

Case Study 3: Real Estate Development Venture

Scenario: Sarah and Alex run a successful real estate development firm and wish to involve their adult son, Daniel, who has recently graduated from university. They plan to transfer property and shares to him but are concerned about TOSI implications.

Application: Shajani CPA helped them utilize a combination of strategies. First, they ensured Daniel was actively engaged in the business, documenting his contributions and role. Next, they structured his shareholdings to meet the criteria for “excluded shares” by ensuring he owned at least 10% of the voting rights and value. Finally, they planned for some of the income to be classified under “excluded business” by proving his direct involvement.

Analysis: This example highlights the effective use of multiple TOSI exemptions. It demonstrates that with proper planning and documentation, substantial compliance and tax optimization can be achieved even in complex business structures like real estate development.

Key Findings on Permissible Property Transfers

The revised TOSI rules have clarified several instances where property transfers within families are permissible without evading taxes:

• Transfers at Fair Market Value: If the property is transferred at fair market value and the family member receiving the property is actively involved in the business, it is generally permissible.
• Inheritances and Matrimonial Transfers: Property received through inheritance or as part of matrimonial settlements is not typically subject to TOSI, provided certain conditions are met, such as the inheritor being a student under 24 or disabled.
• Excluded Business and Excluded Shares: Proper structuring of business and share ownership can facilitate income splitting without triggering TOSI, as seen in the above cases.

These examples and analyses not only demonstrate the application of TOSI but also highlight the importance of strategic planning and documentation in navigating these rules effectively.

 

Strategic Tax Planning Under New TOSI Rules

The revised Tax on Split Income (TOSI) rules introduced significant changes to how income splitting is viewed and managed within family business structures. These changes aim to ensure fairness in taxation while still allowing legitimate family business and estate planning strategies. This section offers guidance for families and tax planners on how to navigate these changes effectively and avoid common pitfalls.

Recommendations for Families and Tax Planners

Identifying Legitimate Opportunities for Income Splitting

1. Utilize Excluded Business and Excluded Shares Exemptions: Understanding and applying these exemptions can significantly benefit families. If a family member is actively engaged in the business for at least 20 hours per week or owns at least 10% of the votes and value of the corporation (and the corporation meets certain income criteria), the dividends or gains from these shares are not subject to TOSI.
2. Document and Demonstrate Active Engagement: For those involved in family businesses, maintaining thorough documentation of their involvement is crucial. Timesheets, job descriptions, and records of decision-making roles can substantiate claims of substantial, continuous, and regular involvement.
3. Strategize Around Reasonable Returns: Especially for family members over the age of 24, ensure that any payments or distributions qualify as reasonable returns based on their contributions to the business. These can include labor, capital, or assumed risks. Document these contributions meticulously to justify the distributions as reasonable.
4. Optimize Use of Spousal and Inheritance Exemptions: Leverage spousal transfers during divorce or at the age of 65 and above, and be aware of the rules around inheritances, especially for transfers to individuals under the age of 24 who are students or disabled.

Planning for Effective Transfer of Property

1. Understand Property Transfer Norms: Recognize when transfers of property within family units are considered acceptable under TOSI rules. For instance, transfers at fair market value where the receiving party is significantly involved in the business can be structured to avoid TOSI.
2. Leverage Estate and Succession Planning: Use the rules surrounding inheritances to plan for the efficient transfer of business and personal assets. Understand how the attributes of inherited property affect TOSI implications.

Avoiding Common Pitfalls

Be Cautious with Income Attribution

1. Avoid Indirect Contributions Missteps: Be vigilant about indirect contributions where the income may inadvertently be subject to TOSI. This includes income or capital gains derived from property that was originally under the name of a high-income earner within the family and later transferred to a lower-income family member without sufficient compensation or justification.
2. Stay Informed on Service Income: With the focus on income from services in TOSI considerations, it’s essential to define whether the business primarily provides services or goods. Misclassification can lead to unexpected TOSI implications.

Regular Compliance and Documentation

1. Keep Detailed Records: Document all decisions and rationales for distributions and income allocations within the family business. This documentation should include meeting minutes, contribution records, and financial statements that justify the distributions.
2. Regularly Review Corporate Structures: Ensure that the business structure and share classifications adhere to the evolving interpretations of TOSI rules. This may involve adjusting share classes and ownership percentages or reevaluating who holds voting shares.
3. Consult With Tax Professionals Regularly: Given the complexity and the potential for significant tax implications, regular consultations with tax professionals who specialize in family business and estate planning are essential. They can provide updates on legislative changes and help in structuring your business and personal finances to comply with current tax laws while optimizing tax benefits.

Plan for Long-Term Implications

1. Consider Long-Term Tax Planning Over Short-Term Gains: Strategic decisions should not only focus on immediate tax savings but also consider the long-term growth and sustainability of the business. This includes planning for future generations and considering the potential changes in tax legislation.
2. Educate Family Members: As part of succession planning, educate the next generation on the implications of TOSI and the importance of compliance. This ensures that as leadership transitions occur, the new leaders are prepared to manage these aspects effectively.

By adhering to these strategies and remaining vigilant against common pitfalls, families and tax planners can navigate the complexities of the TOSI rules effectively, ensuring that their tax planning is both compliant and optimized for the family’s financial goals.

 

Conclusion: Navigating the Nuances of TOSI for Strategic Tax Planning

The landscape of tax planning in Canada has undergone significant changes with the revised Tax on Split Income (TOSI) rules. These changes not only alter how income is taxed when split among family members but also redefine the strategic approaches families and tax planners must consider. Here, we summarize the key points and encourage proactive steps to ensure compliance and optimization of tax benefits.

Summary of Key Points

1. Clarified Exemptions: The TOSI revisions have provided clearer guidelines on what constitutes permissible income splitting. This includes detailed exemptions such as excluded shares, excluded businesses, and reasonable returns based on active involvement or capital contribution.
2. Active Involvement: For families involved in business together, demonstrating active and substantial involvement in the business is crucial. This can exempt certain income types from being subject to TOSI, fostering a fair environment for family members who genuinely contribute to the business.
3. Fair Market Value Transactions: Property transfers within a family that are conducted at fair market value and for legitimate business purposes are generally outside the scope of TOSI. This helps maintain the integrity of familial transactions while allowing for legitimate tax planning.
4. Exemptions for Specific Circumstances: Specific exemptions such as those for young adults engaged in post-secondary education, disabilities, or inheritances, underscore the need for careful planning and documentation in family wealth transfers.

Call to Action

Understanding and applying the TOSI rules can be complex, especially given the nuances and specific exemptions that might apply to different family and business scenarios. It is crucial for taxpayers, particularly those involved in family-owned enterprises, to seek professional guidance to navigate these rules effectively. Consulting with a tax professional can provide tailored advice and strategic planning to ensure compliance while optimizing tax benefits.

At Shajani CPA, we specialize in navigating complex tax landscapes like these. Our experience and in-depth understanding of TOSI, combined with a personalized approach to each client’s unique circumstances, make us a trusted partner in your tax planning journey. We encourage you to reach out to explore how these changes might impact your family and business, ensuring you make informed decisions that align with both your financial goals and tax obligations.

In conclusion, as tax laws continue to evolve, staying informed and proactive in your tax planning strategies is more important than ever. Engaging with professionals like those at Shajani CPA can provide the expertise and peace of mind needed to navigate these changes effectively, ensuring that your family and business are positioned for optimal tax outcomes.

This information is for discussion purposes only and should not be considered professional advice. There is no guarantee or warrant of information on this site and it should be noted that rules and laws change regularly. You should consult a professional before considering implementing or taking any action based on information on this site. Call our team for a consultation before taking any action. ©2026 Shajani CPA.

Shajani CPA is a CPA Calgary, Edmonton and Red Deer firm and provides Accountant, Bookkeeping, Tax Advice and Tax Planning service.