Invest or Pay Off Debt First in Canada?

The Core Principle: Comparing Two Rates

The fundamental logic is straightforward: paying off a debt charging 20% interest is equivalent to earning a guaranteed 20% return on the amount you repay. No mainstream investment can reliably match that. On the other hand, a mortgage at 4–5% is much cheaper than the long-term historical average return of a diversified portfolio (often cited in the range of 6–8% before tax over the long run — with no guarantees).

The practical rule: if your debt's interest rate exceeds your expected after-tax investment return on a comparable investment, prioritize repayment. If your debt rate is lower, investing alongside repayment can be financially advantageous — provided you're comfortable with market risk.

High-Interest Debt: Pay It Off First

Consumer debts — credit cards (~19.99% in Canada), unsecured personal lines of credit, installment loans — carry rates that are almost impossible to beat through investing. The Financial Consumer Agency of Canada (FCAC) consistently highlights the household impact of these high rates.

• Credit cards: typical annual rates of 19.99%–29.99%
• Payday loans: effective annual rates that can exceed 300%
• Unsecured lines of credit: often 8–15% depending on your profile

Against these rates, repayment is mathematically superior to almost any investment. Use our debt payoff calculator to see the real interest savings in dollars.

Low-Interest Debt: Often Invest Alongside

A mortgage at 4%, a student loan at 5%, or a home equity line at prime rate presents a different picture. In these cases, investing through registered accounts — RRSP, TFSA, RESP — can be more advantageous mathematically, especially given the tax advantages each account offers.

• RRSP: the tax deduction generates an immediate refund that lowers the net cost of contributing
• TFSA: tax-sheltered growth improves your effective after-tax return
• RESP: the Canada Education Savings Grant (CESG) adds 20% on the first $2,500 contributed per child per year (up to $500 in annual grants)

That said, the decision remains personal: your comfort level with debt, income stability, and investment horizon all matter. A financial planner can help you analyze your specific situation.

Free Money First: Always Capture These

Some sources of return are effectively risk-free and should almost always be prioritized:

• Employer matching contributions: if your employer matches 50% or 100% of your own contributions to a group RRSP or pension plan, not contributing means turning down an immediate 50%–100% return on that money.
• RESP CESG: the federal government adds a 20% grant on the first $2,500 contributed per child per year. That's an immediate, guaranteed 20% return — hard to pass up even if you carry moderate-rate debt.
• Canada Learning Bond (CLB): for eligible lower-income families, the government contributes up to $2,000 to an RESP with no matching contribution required.

The Government of Canada details these programs on canada.ca.

The Behavioural Angle: Peace of Mind Has Real Value

Math doesn't tell the whole story. Some people sleep much better debt-free, even at a low rate — and that peace of mind has genuine value. If financial stress is affecting your quality of life or daily decisions, accelerating debt repayment may be the right call, even when the math slightly favours investing.

A hybrid approach — paying a bit extra toward moderate-rate debt and investing a modest amount each month — lets you make progress on both fronts while building lasting financial habits. The most important thing is to start, regardless of which strategy you choose.

Frequently asked questions