An RRSP loan borrows money from a bank to fund an immediate RRSP contribution, generating a tax refund that is then used to repay part of the loan. The strategy makes sense only when the tax refund is meaningfully larger than the after-tax interest cost on the loan, the contributor has the income and discipline to repay the loan within a year or two, and the contributor cannot otherwise fund the contribution from cash. For most situations, contributing cash you already have produces a better risk-adjusted outcome.
How an RRSP loan works
The contributor takes out a loan (typically at prime or prime + a spread) for the desired contribution amount, deposits the borrowed funds into an RRSP before the contribution deadline, claims the deduction on the current year’s tax return, receives the tax refund, and uses the refund to pay down the loan. The remaining loan balance is repaid from regular income over the chosen amortization period.
Math: when an RRSP loan beats waiting
The benefit of an RRSP loan compared to contributing the same amount in cash a year later (after saving up) depends on three things: the marginal tax rate at contribution time (determines refund size), the loan interest rate (determines borrowing cost), and the expected RRSP investment return (determines opportunity cost of waiting).
Worked example: Contributor with 40% combined marginal rate, considering a $10,000 RRSP contribution in February 2026 versus saving $10,000 in cash and contributing in February 2027.
| Approach | Cash flow | Tax refund | Loan interest cost (1 year, prime 7.45%) | Net cost |
|---|---|---|---|---|
| Loan now, repay over 1 year | $10,000 contribution funded by loan | $4,000 (used to repay loan) | ~$280 (interest on declining balance) | $6,280 plus interest cost; investment grows for full extra year |
| Save cash, contribute in 1 year | $10,000 contributed from saved cash | $4,000 (next year) | $0 | $6,000 net (with 1 year less of investment growth) |
The loan strategy “wins” when one extra year of investment growth (e.g., 6% to 8% on $10,000 = $600 to $800) exceeds the after-tax loan interest (~$280 in the example). At those numbers, loan strategy wins by $300 to $500. A poorer market year, higher interest rates, or lower marginal rate flip the result.
When an RRSP loan is justified
- Contributor has unused RRSP room and a high marginal rate (35%+) that is expected to drop in a future year (e.g., parental leave coming up, business retirement, semi-retirement).
- Contributor has confirmed cash flow to repay the loan within 12 months at most.
- Loan interest rate is low relative to expected RRSP return.
- Contributor has the discipline to put the tax refund directly toward the loan (not back into spending).
When an RRSP loan is a bad idea
- Contributor already has high non-mortgage debt or has been paying minimum payments on existing credit.
- Loan interest rate is high (e.g., personal line of credit at prime + 4%, credit card debt).
- Contributor’s income is uncertain and they may not be able to repay quickly.
- Contributor has TFSA room and would benefit more from tax-free growth in TFSA than from the marginal RRSP refund (lower-income contributors usually benefit more from TFSA than RRSP).
- The marginal rate is low (e.g., 25% combined). Refund is smaller and the leverage math doesn’t work as well.
RRSP loan interest is not deductible
Interest paid on a loan used to make an RRSP contribution is not tax-deductible. This is a critical difference from interest on a loan used to invest in a non-registered taxable account (where interest can be deductible if the investment generates taxable income). The non-deductibility of RRSP loan interest makes the math less favourable than naive comparison would suggest.
Catch-up loans for unused room
A specific case where RRSP loans more often make sense is the “catch-up loan” used to deposit a large amount of unused carry-forward room from prior years. A taxpayer with $50,000 of unused room and a high marginal rate can capture a one-time $20,000+ refund by borrowing for a large contribution, then using the refund and several years of regular income to repay. Banks offer 5- to 10-year catch-up loan amortizations specifically for this case.
The math improves when the marginal rate on the deduction is much higher than the average rate that will apply to RRIF withdrawals decades later, and when the additional years of tax-sheltered compounding meaningfully exceed loan interest.
Alternative: contribute next year and use refund to pre-fund
A simpler alternative to an RRSP loan: contribute what you can afford in cash this year, file your taxes, then use the refund to make a larger contribution next year (or contribute the refund directly to TFSA). This avoids debt entirely and captures most of the tax benefit over a slightly longer time frame.
Frequently asked questions
- Should I take an RRSP loan?
- Only if your marginal rate is high (35%+), the loan rate is low, you can repay within 12 months, and you have the discipline to direct the tax refund to the loan.
- Is RRSP loan interest tax-deductible?
- No. Interest on a loan used for RRSP contribution is not deductible. Interest on a loan used for non-registered investments may be deductible.
- How quickly should an RRSP loan be repaid?
- Within 12 months at most for short-term loans. The longer the loan is outstanding, the more interest cost erodes the tax benefit.
- Is an RRSP catch-up loan different?
- Catch-up loans fund a large contribution using accumulated unused room. They have longer amortizations (5-10 years) and make more sense when current marginal rate is meaningfully higher than expected retirement rate.
- Should I borrow to contribute or wait and save?
- Compare one extra year of tax-sheltered growth against the after-tax loan interest cost. Loan wins when growth exceeds interest, often by a small margin or none at all.
- Can I use my tax refund directly to repay an RRSP loan?
- Yes. This is the standard structure. The refund is calculated and applied to the loan as soon as the T1 is processed, typically within 2 to 4 weeks of filing.
- Is a TFSA contribution better than an RRSP loan?
- For lower-income contributors (under approximately $50,000), often yes. TFSA growth is tax-free without requiring a deduction. For higher-income contributors, RRSP captures a larger immediate refund.