Issuing shares to a spouse and paying them dividends looks, on paper, like a straightforward way to move income into a lower tax bracket. For most incorporated IT contractors, it doesn’t work, because the tax on split income (TOSI) rules tax a dividend that doesn’t qualify for an exclusion at the top personal marginal rate, in the recipient’s hands, regardless of what bracket that person would otherwise be in. The strategy and the rule that blocks it are both worth understanding separately from the more common (and generally more workable) approach of paying a family member salary for real work.
What TOSI Actually Taxes
TOSI applies to dividends, certain other amounts derived from a related business, and specified capital gains paid or allocated to a family member of the business owner, unless the amount falls within a specific exclusion. It does not apply to salary or wages. That distinction matters because it means the entire TOSI analysis is only relevant to dividend and share-based compensation. A family member paid through payroll for genuine work is evaluated under the ordinary reasonable-salary standard, not TOSI, covered in the paying a spouse or family member for admin work guide.
Where TOSI applies, the dividend is taxed at the highest personal marginal rate with no access to the recipient’s own graduated brackets or basic personal credits against that income. This removes the entire point of income splitting: the tax saved by moving income to a lower-income family member disappears, and in many cases the family ends up worse off than if the dividend had simply been paid to the higher-income shareholder directly.
The Excluded Business Test
The most commonly cited TOSI exclusion is the excluded business test. An adult family member is treated as actively engaged in the business, and dividends paid to them fall outside TOSI, if they work an average of at least 20 hours per week during the portion of the year the business operates, either in the current year or in any five prior taxation years. Meeting that threshold in any five prior years locks in the exclusion going forward even if current-year hours drop, which is a detail worth documenting once it’s met.
Below 20 hours a week, there’s no automatic safe harbour. A taxpayer can still argue actively-engaged status on the facts, but without the bright-line 20-hour threshold, that argument is uncertain and fact-dependent in a way the automatic test is not. A spouse handling two or three hours a week of invoicing or scheduling, the kind of role that supports a modest, reasonable salary, does not clear the 20-hour bar and gets no exclusion for dividends on that basis.
Why Excluded Shares Rarely Apply to Contractor Corporations
For a family member aged 25 or older, dividends on excluded shares are outside TOSI. But excluded shares require, among other conditions, that less than 90% of the corporation’s gross business income come from providing services, along with a minimum 10% voting and value threshold on the shares held.
Most incorporated IT contractors bill nearly all of their revenue as consulting, development, or professional services to one or a handful of clients. That is exactly the profile the 90% services-income test is built to exclude. A single-client or few-client service corporation fails the gross business income test on its own facts, independent of how many shares the family member holds or how they’re structured. This is the reason excluded shares, while real and available in principle, functions as a non-option for the typical contractor corporation rather than a planning route worth pursuing.
The Reasonable Return Test
For a specified individual aged 25 or older who doesn’t meet the excluded business or excluded shares tests, a reasonable return test applies instead. It weighs the amount received against four factors: the work the individual performed in support of the business, the property or capital they contributed, the risk they assumed, and the total amounts already paid to or for the individual relative to what other family members received for comparable contributions. The test is meant to catch amounts that are clearly disproportionate to contribution, not to second-guess a genuine business judgment call about compensation.
For individuals under 25, the equivalent test is narrower: any reasonable return is capped at the prescribed rate of interest applied to whatever capital the individual actually contributed, without regard to labour or risk factors.
A family member with no work performed, no capital invested, and no risk assumed has nothing to point to under either version of this test. A dividend paid to that person has essentially no basis for qualifying as a reasonable return, regardless of the dollar amount chosen. The reasonable return test is not a lower bar than excluded business, it’s a fact-intensive fallback that requires the same underlying reality: the family member actually contributed something to the business.
What the Rules Add Up To for a Contractor Corporation
Put together, the three adult exclusions describe a narrow set of situations: a family member working substantial regular hours (excluded business), a family member holding meaningful equity in a corporation with a diversified non-services revenue base (excluded shares, rarely available to a service corporation), or a family member who genuinely contributed labour, capital, or assumed risk in a way that’s documented and proportionate (reasonable return). Outside those situations, dividends to a family shareholder in a typical single-client IT contractor corporation are taxed at the top rate under TOSI, which erases the tax-bracket arbitrage the arrangement was meant to create.
The practical implication is that paying a family member for real, regular work through payroll, at a defensible salary, is usually the workable route to involving them in the corporation’s income, not issuing them shares to receive dividends. Salary sits outside TOSI entirely and is governed by the reasonableness-of-compensation standard covered in the paying a spouse or family member for admin work guide, which is a more predictable test to satisfy than any of the three TOSI exclusions for a corporation built around one or two client relationships.