Pay Off Your Mortgage or Invest? The Canadian Guide
You've got some extra cash. Maybe a bonus, an inheritance, or you're simply spending less than you earn. The question hits every Canadian homeowner at some point: should I pay down my mortgage faster, or invest that money?
There's no universal right answer — but there is a framework that makes the decision clear for your specific situation.
The Core Math
The decision boils down to one comparison: your mortgage rate vs. your expected after-tax investment return.
The Rule: In Canada, mortgage interest is generally not tax-deductible (unlike the U.S.). That means a 5% mortgage rate requires a 5% after-tax return to break even — not before-tax. This makes the hurdle rate higher than most people think.
Option 1: Pay Down Your Mortgage
Let's say you have a $400,000 mortgage at 4.5% with 20 years remaining. Adding an extra $500/month to your payments would:
Why this works
- Guaranteed return: Every dollar paid toward principal saves you interest at your mortgage rate. No market risk.
- Peace of mind: Mortgage freedom is a powerful psychological benefit that helps many homeowners sleep better.
- Cash flow freedom: Once your mortgage is paid off, your monthly cash flow increases dramatically.
- Builds equity: You own more of your home sooner, providing a buffer if property values dip.
The downside
- Liquidity trap: Money locked in your home isn't easily accessible. You'd need a HELOC or to sell to access it.
- Opportunity cost: If investments return more than your mortgage rate, you're leaving money on the table.
Option 2: Invest the Extra Cash
If you invested that same $500/month in a diversified portfolio returning an average of 7% annually over 20 years:
Tax-advantaged accounts make it even better
| Account | Tax Benefit | Best For |
|---|---|---|
| TFSA | Growth and withdrawals are 100% tax-free | Flexible savings — accessible anytime without tax hit |
| RRSP | Contributions are tax-deductible; taxed on withdrawal | High earners who expect lower income in retirement |
| FHSA | Tax-deductible contributions + tax-free withdrawal for first home | First-time buyers still saving for a down payment |
RRSP Trick: Contribute to your RRSP, then use the tax refund to make a lump-sum mortgage payment. This way you get the best of both worlds — tax-sheltered investing and mortgage reduction.
When to Prioritize Mortgage Paydown
- Your mortgage rate is above 5% and your risk tolerance is low
- You're within 5–10 years of retirement and want to eliminate the payment
- You have no other high-interest debt (credit cards, car loans)
- Market volatility keeps you up at night
When to Prioritize Investing
- Your mortgage rate is below 4% and you have a long time horizon (10+ years)
- You have unused TFSA or RRSP room to capture tax advantages
- You're comfortable with market fluctuations
- You have an employer RRSP match (free money — always take it first)
The Best Answer? Often Both.
For most Canadians, the optimal strategy is a split approach:
- Max out TFSA contributions — the tax-free growth is too good to pass up.
- Take any employer RRSP match — it's an instant 100% return.
- Use remaining extra cash for mortgage prepayments — guaranteed savings with zero risk.
Want help optimizing your mortgage strategy?
Book a free consultation — I'll review your mortgage terms and help you decide the smartest use of your extra cash.
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