The Prescribed-Rate Loan Strategy for Income Splitting

A prescribed-rate loan is one of the few remaining ways for a Canadian family to legitimately shift investment income from a high earner to a lower-income spouse or to a family trust. The higher-income person lends money at the Canada Revenue Agency’s prescribed interest rate. The borrower invests the funds, pays the annual interest back to the lender each year, and keeps the rest of the investment income, which is then taxed at their lower marginal rate.

The strategy is genuinely effective, but only if a small number of conditions are met precisely. This guide explains how it works, the rules that make or break it, and who it suits. It is general information; the structure must be designed and documented with your accountant and a lawyer.

The problem: the attribution rules

Canadian tax law generally prevents a high earner from simply transferring investments to a lower-income spouse to have the income taxed in their hands. Under the attribution rules, if you give or lend money to your spouse without charging adequate interest and they invest it, the resulting investment income is attributed back to you and taxed at your rate. The same principle restricts transfers to minor children.

The prescribed-rate loan is the specific exception the rules allow. If you lend money at or above the prescribed rate and the borrower pays that interest each year on time, the attribution rules do not apply, and the borrower is taxed on the investment income their investing produces. This is why the strategy is a legitimate, long-standing technique rather than a loophole, and it sits among the mainstream income-splitting strategies available to Canadian families.

How the loan works, step by step

The mechanics are straightforward, but each step must be respected.

1. Document the loan. The higher-income spouse lends a sum to the lower-income spouse or to a family trust, with a written loan agreement charging at least the prescribed rate in effect at the time.
2. Invest the funds. The borrower invests the money in a non-registered account in their own name.
3. Pay the interest annually. Each year, the borrower pays the agreed interest to the lender by January 30 of the following year.
4. Report correctly. The lender reports the interest received as income; the borrower deducts the interest paid and reports the investment income the portfolio generated.

The arithmetic that makes the strategy work is simple: the borrower keeps the investment return above the prescribed rate, and that excess is taxed at their lower rate rather than the lender’s higher one.

An illustrative example

The figures below are hypothetical and rounded to show the mechanics only. Actual results depend on the prescribed rate, the investment return, and both spouses’ tax rates.

Item	Amount (illustrative)
Loan from higher-income spouse	$500,000
Prescribed rate on the loan	Assume a low fixed rate
Annual interest paid back to lender	Prescribed rate × $500,000
Investment income earned by borrower	Depends on the portfolio
Income taxed in borrower’s hands	Investment income minus interest paid

The lender is taxed only on the interest they receive. The borrower is taxed on everything the portfolio earns above that interest, at their lower rate. The family’s total tax falls because a slice of investment income has moved down the rate scale. There is no promise of any particular return here; the benefit is purely the tax-rate difference on whatever income is actually earned.

The conditions that make or break it

Three conditions are non-negotiable, and getting any of them wrong undoes the strategy.

• The rate. The loan must charge at least the prescribed rate in effect when the loan is advanced. That rate is then locked for the life of the loan. This is why families pay close attention to the prescribed rate: a loan set up when the rate is low stays at that low rate permanently, even if the rate later rises.
• The January 30 interest payment. The interest must actually be paid, in cash, to the lender by January 30 each year. Not accrued, not forgiven, paid. Miss it once, even by a day, and the attribution rules apply from then on, pulling the income back to the lender. This deadline deserves a recurring reminder.
• A real loan. There should be a proper written agreement, and the interest should move between genuinely separate accounts. The arrangement must look and operate like a real loan, because that is what it is.

Because the consequences of a slip are severe, the annual interest payment is best automated or diarised, and the documentation should be prepared by a professional at the outset.

Who the strategy suits

A prescribed-rate loan is not for everyone. It earns its complexity only where certain conditions line up.

• A meaningful income gap between spouses, so that moving income genuinely lowers the family’s combined rate.
• Investable capital outside registered accounts, since the benefit only arises on taxable investment income. If registered room is still available, filling a TFSA, RRSP or FHSA usually comes first.
• A long time horizon, because the strategy compounds its benefit year after year and the setup effort is fixed.

It fits naturally into the toolkit of high-income earners and families with substantial non-registered portfolios. For those with a corporation, it also complements other approaches to reducing taxes for business owners, though the corporate context adds its own rules.

Lending to a family trust

Rather than lending to a spouse, a higher earner can lend to a family trust whose beneficiaries include a lower-income spouse and children. This can spread investment income across several lower-rate family members, including, with care, income directed to adult children or applied for the benefit of minors.

The trust route adds real cost and complexity: the trust must be established and maintained, annual filings are required, and the tax rules for trusts are intricate. Whether the benefit justifies the overhead depends entirely on the amounts involved. This is firmly a design-it-with-professionals decision, coordinated between your accountant and a lawyer, and it connects to broader family trust planning.

Risks and watch-points

• A rising prescribed rate before you act narrows the benefit of any new loan, though it does not affect loans already in place.
• Weak documentation invites challenge; the loan must be real and recorded.
• The annual payment lapse is the most common failure and the most costly.
• Investment losses still belong to the borrower, so the strategy carries ordinary market risk on top of its tax features.

How it compares with other income-splitting tools

A prescribed-rate loan is one of several ways families lower their combined tax, and it helps to see where it fits among the alternatives.

Tool	How it splits income	Best suited to
Prescribed-rate loan	Shifts investment income to a lower-income spouse or trust	Families with large non-registered capital
Spousal RRSP	Shifts future retirement income to a lower-income spouse	Couples with an income gap saving for retirement
Pension income splitting	Reallocates eligible pension income between spouses	Retirees with pension or RRIF income
TFSA contributions for a spouse	Growth is tax-free, no attribution on TFSA gifts	Couples with unused TFSA room

Giving a spouse money to contribute to their own TFSA, for instance, does not trigger attribution because the growth is tax-free anyway, and filling registered room is usually the first step before a prescribed-rate loan is considered. For retirees, pension income splitting and a spousal RRSP often do more with less complexity. The prescribed-rate loan earns its place specifically where a family has substantial taxable capital outside registered accounts and a durable income gap, which is why it tends to suit higher-net-worth households rather than the typical saver.

A prescribed-rate loan is also not set-and-forget. The annual interest payment must be made on time every year, the investment income and interest must be reported correctly on both spouses’ returns, and the structure should be revisited if circumstances change, for example if the income gap narrows or the borrower’s situation shifts. Because the locked-in rate is permanent, a loan established at a low rate remains valuable even years later, but the discipline around the annual payment never relaxes. Families who set one up should diarise the January 30 deadline and review the arrangement with their advisor and accountant each year.

How Hayes Wealth Partners can help

A prescribed-rate loan is a precise, legitimate way to lower a family’s combined tax on investment income, but it rewards discipline and good documentation and penalises carelessness. We help clients decide whether it fits, size the loan sensibly, and coordinate the investment side with the tax structure through our tax planning and investment management work, alongside your accountant and lawyer.

If you and your spouse have a meaningful income gap and investable capital outside your registered accounts, book a private consultation and we will assess whether a prescribed-rate loan belongs in your plan.