Income Splitting in Canada: What Survives the Attribution and TOSI Rules

Canada taxes individuals, not households, on a progressive scale. So a couple earning $200,000 between them pays materially less tax when it is split evenly than when one of them earns all of it. That arithmetic is the entire reason income splitting exists as a topic.

Parliament noticed the same arithmetic decades ago. The attribution rules are the default answer: give or lend property to a family member so the income is taxed in their hands, and the income is taxed in yours anyway. The tax on split income, or TOSI, closed the corporate version in 2018.

So the useful question is not what income splitting is. It is which methods survive both sets of rules. There are six that reliably do, and each has a condition that people miss.

The default: attribution

If you transfer or lend property to a family member for less than fair market value, the income it earns is generally still yours for tax purposes. What is attributed depends on who received it, and the differences are not intuitive:

Three consequences follow directly from that table.

A gift to a minor is not useless. Income is attributed, but capital gains on the transferred property are not, with a narrow exception for certain farm property. A growth-oriented investment gifted to a child in trust therefore splits the eventual gain, even though any dividends along the way come back to you. The CRA’s own plain-language page on the attribution rules has been withdrawn, and the fullest statement still published is the archived interpretation bulletin IT-511R. Archived means the CRA no longer maintains it, so treat it as background on the mechanics rather than as current guidance, and confirm the present position before acting on a transfer.

Second-generation income compounds out of the problem. Income earned on attributed income belongs to the recipient. Keep the attributed income in a separate account and the earnings on it are theirs permanently. Over a long horizon this is quietly significant, and it costs nothing to set up.

Attribution to an adult child does not apply, but that does not make a gift to an adult child a splitting strategy: TOSI may still apply if the income comes from a private corporation, and a gift is irrevocable.

Note also that attribution generally stops on death, on a breakdown of the marriage where the parties are living separate and apart, and where the recipient paid full fair market value consideration. More detail in the income attribution rules.

Method 1: Pension income splitting

The largest and simplest split available to retired Canadians, and it needs no transfer of any property.

You can allocate up to 50% of eligible pension income to your spouse or common-law partner by a joint election on Form T1032, filed by the due date with both returns showing identical information. It is elected annually, so the percentage can change every year, and only one election is permitted per year. Tax withheld at source is allocated in the same proportion. See pension income splitting.

What counts as eligible pension income depends on your age, and this is the detail that trips people up:

• Under 65: essentially only lifetime annuity payments from a registered pension plan. RRIF income does not qualify
• 65 or over: RRIF and annuity payments from an RRSP or a DPSP also qualify

Which produces a concrete planning point. Someone at 65 with an RRSP and no defined benefit pension can convert part of it to a RRIF, creating income that is both eligible for splitting and eligible for the pension income amount, where neither existed before. That is worth doing years before the mandatory conversion at 71. See pension income splitting in Canada.

Note that CPP is not eligible pension income for this election. It has its own mechanism, below.

Method 2: CPP pension sharing

Separate from pension income splitting, and separately applied for.

Spouses or common-law partners living together, where at least one is receiving or has applied for a CPP retirement pension, can apply to share their pensions. The shareable portion is based on the months you lived together during your joint contributory period. If you contributed more than your partner, your pension amount falls and theirs rises. Applications are made through Service Canada, per CPP pension sharing.

This is a genuine split of income, not a paper election, and it is frequently overlooked because it sits with Service Canada rather than with the CRA. It is worth checking whenever there is a large gap between two partners’ CPP entitlements.

Method 3: Spousal RRSP

You contribute, you take the deduction against your own income, the plan belongs to your spouse, and they are taxed on the withdrawals. The contribution uses your RRSP room, not theirs.

The condition everyone knows about is the three-year rule, and it is routinely stated imprecisely. If your spouse withdraws from any spousal plan, an amount is included in your income up to the total you contributed to any spousal RRSP in the year of withdrawal or the two preceding calendar years. The rest is taxed in their hands. The lookback is not tied to the particular plan the money came out of. See contributing to a spousal RRSP and the spousal RRSP strategy.

The practical rule that falls out of this: stop contributing to a spousal plan three calendar years before the withdrawals are planned to start.

Since pension income splitting arrived in 2007, spousal RRSPs are less essential than they were. They remain valuable where withdrawals will happen before 65, where one spouse expects a much longer retirement, or where a lump-sum withdrawal is contemplated, because pension splitting caps out at 50% and a spousal RRSP does not.

Method 4: The prescribed rate loan

The most powerful method available to a couple with significant non-registered investments, and the one most often broken by administrative failure.

The mechanism: you lend money to your lower-income spouse, or to a family trust, at an interest rate not less than the prescribed rate in effect when the loan is made. Attribution does not apply, so the investment income above that rate is taxed in their hands. You report the interest received; they deduct the interest paid.

Two conditions are absolute:

• The rate is fixed at the prescribed rate on the day the loan is made, and stays fixed for the life of the loan. A loan made when the rate is low keeps that rate permanently, which is why the timing of setting one up matters far more than the timing of anything else here
• The interest must actually be paid, in cash, no later than 30 days after the end of each calendar year. Miss it once, in any year, and attribution applies to that year and to every year afterwards. There is no cure

That second condition is why these fail. Not because the strategy is wrong, but because a calendar reminder was not set. Check the current rate at prescribed interest rates before making a loan, and read the prescribed rate loan strategy for the documentation a properly papered loan needs.

Method 5: Paying a family member who actually works

A salary to a spouse or child for work genuinely performed in your business is deductible to the business and taxable to them. It also creates RRSP room and CPP entitlement for them, which a dividend does not.

Two conditions, and only two: the work must be real, and the amount must be reasonable for that work performed by an arm’s length person. Both are questions of fact, and both are what the CRA examines.

What makes it defensible: a job description, timesheets or a record of hours, a rate you could justify by reference to what you would pay a stranger, actual payment through payroll with source deductions, and a T4 issued. What makes it indefensible: a round annual figure with no supporting record, paid once in December.

Because this is remuneration rather than a transfer of property, attribution does not apply, and money the family member subsequently invests is genuinely theirs.

Method 6: Restructuring who spends and who invests

No transfer, no loan, no election, and no attribution to apply.

The higher-income spouse pays the household expenses: mortgage, groceries, utilities, everything. The lower-income spouse’s after-tax income is left invested. Over time, the investment portfolio accumulates in the lower-rated hands and the income it produces is taxed there.

This is slow, and it is entirely effective, because nothing was transferred. It requires only that the couple maintain separate accounts and can show whose money bought what. Records matter here: commingled accounts destroy the distinction the strategy depends on.

Related and equally simple: a gift to a spouse for their TFSA. Attribution applies to income earned on transferred property, and income inside a TFSA is not taxed at all, so there is nothing to attribute. Funding a lower-earning spouse’s TFSA to its limit is the least complicated splitting move available. The same logic supports contributing to an RESP for a child, where growth accumulates tax-free and educational assistance payments are taxed in the student’s hands: see RESP withdrawal strategies.

TOSI: what closed in 2018

Before 2018, an owner-manager could issue shares to a spouse and adult children and pay dividends to each, spreading income across several low brackets. The tax on split income ended that. Where TOSI applies, the amount is taxed at the top marginal rate and most personal credits cannot be used against it.

TOSI applies to income from a related business unless the amount is an excluded amount. The exclusions that matter in practice:

Three points worth emphasising. The 20-hour test is a deemed satisfaction of the active engagement requirement, not the only way to meet it, and timesheets, schedules or logbooks are sufficient evidence. The excluded shares test is unavailable to a professional corporation, which is why professionals lost the most in 2018. And the age 65 exclusion deliberately mirrors pension income splitting, so a business genuinely can support a retiring owner and their spouse.

The CRA’s own worked examples are at guidance on the split income rules for adults, and the practical version in the TOSI rules explained.

Choosing between them

Are you retired, or is one of you 65 or over?
├─ YES ──> 1. Pension income splitting (T1032), up to 50%
│          2. CPP pension sharing, via Service Canada
│          3. If you own a business: the age 65 TOSI exclusion
│          These three require no transfer of property.
└─ NO
   │
   Do you own an operating private corporation?
   ├─ YES ──> Does the family member genuinely work in it?
   │          ├─ YES ──> salary at a reasonable rate, documented,
   │          │          or dividends under the excluded business
   │          │          test if the hours support it.
   │          └─ NO ───> TOSI will apply. Do not structure around it.
   │
   └─ NO / ALSO
      │
      Do you have significant NON-REGISTERED investments?
      ├─ YES ──> prescribed rate loan, if you will administer the
      │          30-day interest payment every single year.
      └─ NO ───> fund the lower earner's TFSA and RRSP first,
                 and restructure who pays the household costs.
                 Both are free and neither can go wrong.

What does not work

Gifting cash to your spouse to invest. Attributed, income and capital gains both.

An interest-free or below-prescribed-rate loan to a family member. Where one of the main reasons is to reduce tax, the income is attributed regardless.

Issuing shares to a non-participating family member and paying dividends. This is the arrangement TOSI was written for.

Putting an investment account in a lower-earning spouse’s name using your money. Whose name is on the account does not determine who is taxed. The source of the funds does.

Backdating anything. A loan agreement, a promissory note or a share subscription created after the fact is worth less than nothing, because it turns an error into something considerably worse.

Choosing which of you claims a deduction. Several are assigned by statute rather than left to preference, and child care is the clearest case: it must be claimed by the spouse with the lower net income, which is exactly the opposite of what a household trying to split income would want. The child care deduction sets out the short list of situations in which the higher earner can claim instead.

The order to work in

Income splitting is worth doing where the rate gap between two people is real and durable. Where both are in the same bracket, the administration is a cost with no return.

Start with the free ones: the TFSA transfer, the spending restructure, and, if you are retired, the two elections. Then consider a prescribed rate loan if the non-registered portfolio is large enough to justify the annual discipline. Only then consider anything involving a corporation or a trust, and expect that conversation to be about whether TOSI applies rather than about how much can be split.

If you have a corporation with family shareholders, a prescribed rate loan you are not certain has been administered correctly, or a spousal RRSP with withdrawals coming up, that is worth a review. All three have a specific condition that determines whether the arrangement works, and all three are fixable while there is still time.