At 45 With Little Saved, Should Glen Borrow $50,000 for His RRSP?
Glen earns a steady salary, owns a house with $100,000 left on the mortgage, and has almost nothing set aside for retirement. His tax refund this year could be $15,000 if he maxes out his unused RRSP room, money that would take him years to save on his own. A bank will lend him $50,000 at 7% to make the contribution now, structured so the refund lands in time to pay down a large chunk of the principal within 90 days. The question isn't whether the math works on a spreadsheet. It's whether Glen can handle what happens when it doesn't.
The tax arbitrage only works if you're disciplined with the refund
An RRSP loan is a forced-savings mechanism dressed up as leverage. You borrow, you contribute, you claim the deduction, you get a refund. If that refund goes straight onto the loan principal, the interest cost shrinks fast and the net borrowing drops to something manageable. A $50,000 loan at 7% costs roughly $3,500 in annual interest. A $15,000 refund applied within three months cuts the outstanding balance to $35,000, and the effective interest paid in year one to around $2,000. That's the happy path.
The unhappy path is Glen spending the refund on a bathroom renovation or an Edmonton vacation, leaving him with $50,000 of debt at 7% and a portfolio that needs to return more than 7% after fees just to break even. Canada Revenue Agency does not allow RRSP loan interest as a tax deduction, so every dollar of interest is dead weight. If the market drops 19% in year one, which it did in 2022, Glen is underwater on the loan and psychologically primed to panic-sell at the bottom.
Mortgage paydown is the guaranteed return
Glen's mortgage is likely sitting somewhere between 3% and 5%, depending on when he last renewed. Paying down $50,000 of principal saves him that interest rate, compounded, for every year the mortgage would have run. That is a locked-in, risk-free return. An RRSP contribution is a bet that tax-deferred growth inside the account, plus the value of the immediate tax deduction, will outperform the mortgage rate after accounting for loan interest and future taxes on withdrawals.
At age 45, Glen has roughly 20 years before mandatory RRSP-to-RRIF conversion at 71. Twenty years of compounding is real time, and starting with $50,000 instead of zero puts significantly more money to work. But the spread between his borrowing cost and his expected portfolio return is narrow in 2026. If Glen is borrowing at 7% and earning 6% net in a balanced portfolio, the strategy loses money before he even factors in the stress.
The alternative almost nobody mentions
Alberta workers earning over $100,000 see meaningful tax relief from RRSP deductions, because the combined federal and provincial marginal rate reaches 30.5%. Glen is likely in that range. But if his income is lower, say, $70,000, his marginal rate is closer to 30%, and the refund shrinks accordingly. At that income level, a Tax-Free Savings Account often makes more sense than an RRSP, because TFSA withdrawals are tax-free and don't trigger Old Age Security clawbacks two decades out.
For someone with little saved and a mortgage still on the books, the TFSA is also the safer psychological play. Contributions are made with after-tax dollars, so there's no refund to mismanage, and the money can be pulled in an emergency without tax consequences. An RRSP withdrawal before retirement gets taxed as full income and burns contribution room permanently.
Glen is 45 with minimal savings and no margin for error. Borrowing $50,000 to invest adds a second layer of financial risk on top of a life that already has no cushion. If his income drops, if the furnace dies, if the market tanks, the loan payments do not stop. The math works on paper when everything goes right. Everything does not always go right.
Glen earns a steady salary, owns a house with $100,000 left on the mortgage, and has almost nothing set aside for retirement. His tax refund this year could be $15,000 if he maxes out his unused RRSP room, money that would take him years to save on his own. A bank will lend him $50,000 at 7% to make the contribution now, structured so the refund lands in time to pay down a large chunk of the principal within 90 days. The question isn't whether the math works on a spreadsheet. It's whether Glen can handle what happens when it doesn't.
The tax arbitrage only works if you're disciplined with the refund
An RRSP loan is a forced-savings mechanism dressed up as leverage. You borrow, you contribute, you claim the deduction, you get a refund. If that refund goes straight onto the loan principal, the interest cost shrinks fast and the net borrowing drops to something manageable. A $50,000 loan at 7% costs roughly $3,500 in annual interest. A $15,000 refund applied within three months cuts the outstanding balance to $35,000, and the effective interest paid in year one to around $2,000. That's the happy path.
The unhappy path is Glen spending the refund on a bathroom renovation or an Edmonton vacation, leaving him with $50,000 of debt at 7% and a portfolio that needs to return more than 7% after fees just to break even. Canada Revenue Agency does not allow RRSP loan interest as a tax deduction, so every dollar of interest is dead weight. If the market drops 19% in year one, which it did in 2022, Glen is underwater on the loan and psychologically primed to panic-sell at the bottom.
Mortgage paydown is the guaranteed return
Glen's mortgage is likely sitting somewhere between 3% and 5%, depending on when he last renewed. Paying down $50,000 of principal saves him that interest rate, compounded, for every year the mortgage would have run. That is a locked-in, risk-free return. An RRSP contribution is a bet that tax-deferred growth inside the account, plus the value of the immediate tax deduction, will outperform the mortgage rate after accounting for loan interest and future taxes on withdrawals.
At age 45, Glen has roughly 20 years before mandatory RRSP-to-RRIF conversion at 71. Twenty years of compounding is real time, and starting with $50,000 instead of zero puts significantly more money to work. But the spread between his borrowing cost and his expected portfolio return is narrow in 2026. If Glen is borrowing at 7% and earning 6% net in a balanced portfolio, the strategy loses money before he even factors in the stress.
The alternative almost nobody mentions
Alberta workers earning over $100,000 see meaningful tax relief from RRSP deductions, because the combined federal and provincial marginal rate reaches 30.5%. Glen is likely in that range. But if his income is lower, say, $70,000, his marginal rate is closer to 30%, and the refund shrinks accordingly. At that income level, a Tax-Free Savings Account often makes more sense than an RRSP, because TFSA withdrawals are tax-free and don't trigger Old Age Security clawbacks two decades out.
For someone with little saved and a mortgage still on the books, the TFSA is also the safer psychological play. Contributions are made with after-tax dollars, so there's no refund to mismanage, and the money can be pulled in an emergency without tax consequences. An RRSP withdrawal before retirement gets taxed as full income and burns contribution room permanently.
Glen is 45 with minimal savings and no margin for error. Borrowing $50,000 to invest adds a second layer of financial risk on top of a life that already has no cushion. If his income drops, if the furnace dies, if the market tanks, the loan payments do not stop. The math works on paper when everything goes right. Everything does not always go right.
Sources
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