The Spousal Loan Strategy is a simple, legal way to split income and lower taxes.
If you and your spouse have very different incomes, chances are you’re paying more tax than you need to.
In Canada, we’re taxed as individuals – not as households. That means a couple with one high earner and one low (or no) earner might pay far more in tax than a couple with two average incomes. It also means any non-registered investments held by the higher-income spouse are likely being taxed at the top marginal rate, often 50% or more.
So how can you legally shift some of that investment income to your lower-income partner and pay less tax overall?
One of the most effective – and CRA-approved – ways is through a spousal loan. What Is a Spousal Loan?
- A spousal loan is a strategy where the higher-income spouse loans money to the lower-income spouse, who then invests it in a non-registered account. Any income earned on those investments – interest, dividends, or capital gains – is taxed in the lower-income spouse’s hands.
- This sounds simple, but to avoid what’s called the attribution rules (which would otherwise send all that income back to the higher-income spouse’s tax return), the strategy has to follow some very specific guidelines.
- Most importantly, the loan must charge interest at the CRA’s prescribed rate in effect at the time it’s set up, and that interest must be paid by January 30 each year. If those rules are followed, the income earned on the invested funds stays with the lower income spouse – and the household tax bill goes down.
How It Works in Practice
Let’s say Maria earns $350,000 per year. Her spouse, David, doesn’t work and has no taxable income. Maria wants to invest $500,000 that’s sitting in a taxable account but knows that any income she earns will be taxed at over 50%.
Instead, she lends the $500,000 to David, charging the prescribed rate of 5% based on the rate at the time of the loan. They sign a formal loan agreement and David invests the funds in a diversified portfolio that earns an average of 7% annually – or about $35,000 in income.
Each year, David pays Maria $15,000 in interest (3%, in July 2025, of the $500,000 loan), which Maria includes on her return. The remaining $20,000 of investment income – the amount earned above the loan interest – stays with David and is taxed at his rate, which might be close to zero.
Over time, this creates meaningful savings. The higher the difference between the prescribed rate and the investment return, the greater the benefit.
Capital Gains: Where the Strategy Really Shines
Interest and dividends generate savings, but capital gains are where this strategy can really move the needle.
That’s because capital gains are only 50% taxable in Canada, and the timing of when they’re realized can often be controlled. When a lower-income spouse holds the investments, capital gains are taxed at their rate instead of the higher-income spouse’s.
For a family with long-term investments – especially equities that grow over time and are sold down the road – the ability to realize those gains in the lower-income spouse’s hands can lead to tens of thousands in tax savings, especially if gains are taken gradually or used to fund lifestyle expenses in retirement.
Here is a chart that helps visualize it
| Without Spousal Loan | With Spousal Loan | ||
|---|---|---|---|
| High Income Spouse | High Income Spouse | Lower Income Spouse | |
| Initial Investment | $500,000 | 0 | $500,000 |
| Income Generated | $35,000 | 0 | $35,000 |
| Interest Received (paid) | N/A | $15,000 | $(15,000) |
| Pre-Tax Income | $35,000 | $15,000 | $20,000 |
| Taxes Payable | $(17,500) | $(7,250) | $(5,000) |
| After Tax Income | $17,500 | $7,250 | $15,000 |
| Total after-tax income | $17,500 | $22,250 | |
| Spousal Loan Tax Savings + Potential Growth |
|
Note that these numbers are purely illustrative and using a relatively high 7% growth rate. Tax rates have been rounded to to 50% for the high income spouse and 25% for the low income spouse for example sake to make it easier to follow along. If investment values decline, the interest must still be paid to ensure no attribution occurs.
Key Rules to Get Right
There are a few very specific rules that must be followed for this strategy to work – and if you get them wrong, the benefits can disappear.
First, you need a formal loan agreement. This isn’t something you just “do” verbally. The agreement should include the amount, interest rate, payment terms, and a clear record that the loan exists and is separate f rom any other marital finances.
Second, the interest must be paid by January 30 of the following year. Not just accrued or “owed” – it must actually be paid. If even one year is missed, the attribution rules kick in and the income will be taxed back to the high income spouse from that point forward.
Third, the borrowed funds must be invested in a non-registered account (No TFSA or RRSP, etc.). Using the money for personal expenses, debt repayment, or gifting it onward disqualifies the strategy. And finally, if you ever want to reset the loan because prescribed rates drop, you’ll need to properly repay the old loan and create a brand new agreement. You can’t just “update” the rate – it must be a clean start.
What Happens If Rates Are High?
This strategy works best when prescribed rates are low, and investment returns are high. But even in a higher-rate environment, it can still make sense – especially when you have a long time horizon or are investing in assets that produce capital gains over time.
It’s also worth noting that once you lock in the loan, that prescribed rate is fixed. Even if rates rise later, you stick with the original rate for the life of the loan.
For example, couples who set up spousal loans during the years when the prescribed rate was 1% can continue to benefit from that low rate even now, when the current rate is 5%. That difference is meaningful – especially when compounded over many years.
A Simple but Powerful Long-Term Strategy
For families where one spouse is earning significantly more than the other – or where one partner plans to stay home, retire early, or earn less for a period of time – the spousal loan can be an elegant way to reduce overall tax. It doesn’t require complicated structures or offshore entities. It’s not a loophole or a grey area. It’s a straightforward strategy that’s been acknowledged and accepted by CRA – as long as you follow the rules. It also integrates well with other parts of a broader financial plan. For example, you might use your corporate dividends or salary to fund the loan, or layer this strategy alongside other income-splitting techniques like pension splitting or strategic RRIF withdrawals in retirement.
Final Thought
This is one of those strategies that’s often overlooked because it feels too simple – or gets dismissed because of the paperwork. But for couples with excess capital in the high-income spouse’s name, it’s one of the cleanest and most effective ways to reduce family tax over time. It works great when there’s a significant gap between spouses’ tax rates, and the investment return exceeds the prescribed loan rate.
If you’re wondering whether this strategy might make sense in your situation – or you’ve heard about it but aren’t sure how to set it up – we’d be glad to help.
Sometimes the best strategies aren’t the most complex. They’re just the ones that get done, and done right.
