Canada's progressive income tax system creates a powerful incentive for families to distribute income across multiple earners. When one person earns $200,000, a significant portion is taxed at the top federal marginal rate of 33% — on top of provincial tax that in Alberta pushes the combined rate above 48%. Split that same $200,000 evenly between two spouses and each stays in a lower bracket, potentially saving thousands of dollars every year. That principle — shifting income to lower-bracket family members — is the engine behind income splitting in Canada.
The challenge is that the Canada Revenue Agency has spent decades closing the obvious loopholes. Understanding which strategies survive CRA scrutiny is the difference between legitimate tax planning and an audit trigger. The team at Swift Accounting Calgary works through these structures regularly, and this guide covers every major approach that is still fully legal in 2025.
Before exploring what works, it helps to understand the two main weapons CRA uses to block informal income splitting.
Attribution rules (sections 74.1 and 74.2 of the Income Tax Act) are designed to prevent the simplest workaround: giving or lending money to a lower-income spouse so they invest it and report the returns. Under these rules, any income (dividends, interest) or capital gains earned on property you transfer to your spouse is attributed back to you and taxed at your rate. The same rules apply when you transfer property to a minor child — income earned on that property flows back to you until the child turns 18.
Tax on Split Income (TOSI) was introduced in 2018 and extended attribution logic to adult family members receiving dividends from a private corporation. Unless a specific exclusion applies, TOSI taxes those dividends at the highest marginal rate regardless of the recipient's actual income. The exclusions matter enormously — they are discussed below under each applicable strategy.
A spousal RRSP is one of the most accessible income splitting tools available to any couple, regardless of whether they run a business. The higher-income spouse contributes to an RRSP registered in the lower-income spouse's name, using the contributor's own deduction room. The contributor gets the deduction today at their higher marginal rate. At retirement, withdrawals are taxed to the annuitant spouse — ideally at a much lower rate.
The critical rule is the three-year attribution period. If the annuitant spouse withdraws funds within the same calendar year as a contribution, or within the two calendar years following the year of the last contribution, the withdrawal is attributed back to the contributor. To cleanly shift the income, the last contribution must be made at least three full calendar years before any withdrawal. This makes spousal RRSPs a medium-term planning tool, not a quick fix.
For a couple where one spouse will retire into a low income bracket, spousal RRSP contributions made over a working lifetime can be worth tens of thousands of dollars in cumulative tax savings.
Once you reach retirement, up to 50% of eligible pension income can be allocated to a spouse for tax purposes — with no actual transfer of money required. The election is made on form T1032 when filing your T1 returns. Eligible income includes RRIF withdrawals, registered pension plan payments, and annuity income. CPP and OAS are not eligible for pension income splitting (though CPP sharing is a separate option).
For couples with significant income disparity in retirement, this election commonly saves $5,000 to $15,000 per year. Because no money actually moves, there are no attribution concerns and no legal structure required — it is a pure tax return election, repeated annually as long as it is beneficial.
The prescribed rate loan is the correct answer when attribution rules would otherwise defeat a direct transfer. Instead of gifting money to a lower-income spouse, you lend it at CRA's prescribed interest rate. As of 2025, that rate is 4%. The spouse invests the loaned funds and any investment return above 4% is taxed to them, not to you. The loan interest of 4% is deductible to the borrowing spouse and taxable to you, but at a relatively modest amount.
The loan must be documented in writing, and the borrowing spouse must actually pay the interest to you by January 30 of the following calendar year. Missing even one year's interest payment can collapse the entire arrangement and trigger attribution going forward. The loan rate is locked in at whatever the prescribed rate is when the loan is created, making the current 4% rate a reasonable benchmark compared to potentially higher rates in future years.
A discretionary family trust holding shares of a private operating company is one of the most powerful income splitting structures available to business-owning families, though it comes with meaningful legal and accounting costs. The trust holds shares, earns dividends from the operating company, and the trustees have discretion to allocate trust income among adult beneficiaries each year — directing larger amounts to lower-income family members.
TOSI is a significant constraint here. For dividends paid to an adult family member through a trust to avoid TOSI, the recipient generally must be actively involved in the business — working 20 or more hours per week on average during the year, or meeting other specific exclusions based on age or years of contribution to the business. When family members genuinely work in the business, a trust can provide substantial flexibility. When they do not, TOSI will apply the top marginal rate and eliminate the benefit.
The clearest TOSI exclusion applies when an adult family member works an average of 20 or more hours per week in the business during the current year, or has done so in any previous year. That individual is fully excluded from TOSI on dividends received from the corporation. Structuring their compensation as dividends rather than salary can reduce both payroll taxes and, depending on income levels, overall personal tax — though the right mix of salary and dividends requires careful modelling.
Paying a spouse or adult child a salary for actual work performed in the family business is straightforward and effective. The business gets a deduction, and the employee reports income at their lower rate. CRA requires only that the salary be reasonable — that is, roughly what an arm's-length employee would earn for the same work. The role, hours, and compensation should be documented to withstand scrutiny. Paying a nominal amount for minimal involvement is the kind of arrangement that attracts reassessments.
Attribution rules apply to income earned on property given to a minor child — but they do not apply to capital gains on most property. Technically, a parent can gift funds to a minor child who then holds an investment; capital gains realised on that investment belong to the child and are taxed at the child's rate (often zero, given available deductions). In practice, the mechanics of holding investments in a minor's name, trust requirements, and the eventual timing of any gain make this a niche strategy. It is worth discussing with an advisor in specific circumstances rather than as a general rule.
Most families benefit from combining several of these strategies. A business-owning couple in their fifties might run spousal RRSP contributions to equalise future retirement income, pay a documented salary to a working spouse, and use pension income splitting at retirement — without needing a trust or prescribed rate loan at all. A family with multiple adult children involved in a growing business might add a family trust once the complexity is justified by the tax savings. Swift Accounting regularly helps Calgary families map their specific situation against each strategy to identify the highest-impact combination.
The common thread across all of these approaches is documentation and consistency. CRA's audit focus on income splitting has intensified since TOSI was introduced. Strategies that are properly structured and consistently followed hold up; arrangements that are documented only after the fact, or where loan interest is skipped "just this once," tend not to.
If your family's combined tax bill feels higher than it should be, a review of your current income structure is a logical starting point. Contact Swift Accounting Calgary to schedule a planning conversation and identify which income splitting strategies make sense for your situation.
Yes — and the rate is locked in at the time the loan is created. A loan signed while the prescribed rate is 4% retains that 4% rate for its entire term, regardless of future CRA rate changes. If rates rise, existing loans become more advantageous relative to what new loans would require. The critical obligations remain: the loan must be documented in writing, and interest must be paid by January 30 each year without exception.
If an adult family member was excluded from TOSI because they worked 20 or more hours per week, and they reduce their involvement below that threshold, TOSI can apply to dividends received in that year. There is a partial exclusion for individuals who have met the hours test in a prior year, but the rules are nuanced. Any change in a family member's role in the business should trigger a review of how their compensation is structured before dividends are declared.
Yes. The T1032 election allows each spouse to independently elect to split up to 50% of their eligible pension income with the other. If both spouses have pension income, each files their own T1032 if it is beneficial. The calculation is done on each return separately, and the optimal split can vary year to year — it is worth recalculating at tax time rather than assuming the prior year's election is still optimal.
Not inherently, provided the salary is genuinely reasonable for the work performed. CRA does not require a spouse to work full-time to receive a deductible salary from the family corporation. What CRA requires is that the amount paid is consistent with what the business would pay an unrelated employee for the same role and hours. A part-time bookkeeping role, marketing support, or client coordination can all support a legitimate salary — the key is having clear records of the work performed and a salary that aligns with the market rate for that work.
Free 30-Min Consultation · No Obligation
Our Calgary team handles personal tax, corporate returns, GST/HST, payroll, and bookkeeping — all under one roof.
Swift Ltd · Calgary, Alberta · swiftltd.ca