Should You Pay Off Your Mortgage Early or Invest? The $432,000 Question Every Canadian Homeowner Needs to Answer
- Janine Rogan
- Jul 15
- 8 min read
Updated: Jul 17
Here's a question I get all the time: "Should I put my extra money toward my mortgage or invest it?"
It feels like a personal finance question. But it's actually a math question. And when you run the numbers for a Canadian homeowner with a 25-year amortization and a 4% mortgage rate, the answer is clear.
Paying off your mortgage early could be costing you $432,000.
I know. That number is uncomfortable. Because paying off your mortgage feels responsible. It feels safe. It feels like the right thing to do. And for a lot of women, the idea of carrying debt when you could eliminate it feels almost morally loaded.
But feelings and math aren't the same thing. And in 2026, with hundreds of thousands of Canadian homeowners renewing their mortgages for the first time at rates higher than they've seen in a decade, this decision has never mattered more.
So let's run through the actual numbers. And let's talk about why the gap is so much bigger than most people expect.
Why The Paying Mortgage or Invest Debate Hits Differently in 2026
If you bought or refinanced your home in 2020 or 2021, you probably locked in at a historically low rate. We're talking 1.5%, 1.8%, maybe 2.1% if you were a bit later to the party.
Those terms are up now. And you're renewing into a rate environment that looks very different.
A lot of Canadians are coming to the renewal table shocked. Their mortgage payment is going up. Their budget is being squeezed. And the instinct is: pay this thing down faster. Get out from under it.
That instinct is understandable. But before you redirect every extra dollar to your mortgage, you need to understand the opportunity cost. Because that cost is real, it's large, and it compounds over time.
The Assumptions: Let's Be Transparent About the Math
Any comparison like this depends on the inputs. So let's be clear about what we're working with.
Mortgage rate: 4%. This is consistent with current Canadian fixed and variable rates as of mid-2026 for many borrowers.
Investment return: 8% annually. This is the approximate long-run historical average return of a broad market index fund like the S&P 500, adjusted for Canadian investors over long periods.
Amortization: 25 years. Standard Canadian mortgage amortization.
The "extra money" being compared: a fixed monthly amount. The extra payment you could apply to your mortgage OR redirect to investing instead.
These are honest, reasonable assumptions. Not cherry-picked optimism. At different assumptions (higher mortgage rate, lower returns, shorter timeline) the math shifts. But in the current environment, with a 4% mortgage rate and a long time horizon, investing wins by a significant margin.
SCENARIO A: PUT YOUR EXTRA MONEY TOWARD YOUR MORTGAGE
Here's what paying down your mortgage early gets you.
Every extra dollar you put toward your mortgage principal earns you a guaranteed return equal to your mortgage rate. At 4%, you get a guaranteed 4% return on every dollar of principal you prepay.
That's real. It's risk-free. And it shortens your amortization, reducing total interest paid over the life of the loan and moving you to a mortgage-free life sooner. After 25 years of extra payments, you've paid off your home. Your net worth includes the full value of your house. You have no mortgage debt.
This is a solid outcome. It's just not the best one, mathematically.
SCENARIO B: INVEST THAT SAME MONEY INSTEAD
Now imagine instead of putting that extra monthly payment toward your mortgage, you invest it. You put it into a low-cost index ETF inside your TFSA or RRSP. You let it sit. You don't touch it.
At 8% average annual returns compounded over 25 years, that same stream of dollars grows significantly larger than your mortgage savings. The gap? Roughly $432,000.
That's the difference between what your investment portfolio is worth at year 25 under Scenario B versus what you saved in interest and built in equity under Scenario A.
Why The Mortgage vs. Investment Gap is So Massive: Two Forces Working Together
The $432,000 gap isn't just because 8% is bigger than 4%. Two other forces amplify it.
1) LEVERAGE IS ALREADY AT WORK IN YOUR MORTGAGE.
When you took out a mortgage, you leveraged your way into a property worth far more than your down payment. Every extra dollar you put into the house is going into an asset that isn't actively compounding the way a market investment does. You're trading the power of compound growth for the security of debt reduction.
2) TIME IS THE MOST IMPORTANT VARIABLE.
Compound growth is exponential, not linear. The longer money stays invested, the faster the gap grows. At year 5, the difference is manageable. At year 10, it's meaningful. At year 25, it's $432,000.
This is the part most people don't intuitively grasp. It's not that investing is better every month. It's that the gap between the two strategies gets dramatically larger over time because of compounding.
The Canadian Tax Angle:
In Canada, we have tools that make the invest-instead-of-paying-down strategy even more compelling: the TFSA and the RRSP.
TFSA | RRSP | Mortgage |
Your investment growth is completely tax-free. Withdrawals are tax-free. If the $432,000 gap is built inside a TFSA, you keep all of it. | Your contributions reduce your taxable income today. And the growth compounds tax-sheltered until withdrawal. If you're in a high-income year and putting money into your RRSP instead of your mortgage, you're also getting a tax refund on the contribution — which you can then invest. | A mortgage in Canada is paid with after-tax dollars. The interest is not tax-deductible (unlike in the US). So every dollar of mortgage interest you pay, you paid tax on first. |
If Investing Wins Mathematically, Why Do So Many People Pay Down Their Mortgage?
Because math isn't the only thing driving this decision. And that's worth acknowledging.
The psychological benefit of owning your home free and clear is real. The security of having no mortgage payment. The reduced financial vulnerability if something goes wrong with your income. The sense of ownership that comes with no debt on your home.
For some people, especially those with variable income, inconsistent work history, or who have experienced financial instability, the guaranteed return and the peace of mind of eliminating the mortgage is worth more than the mathematical optimal outcome.
And here's something important: an investing strategy you can actually stick with is better than an optimal strategy you abandon when markets drop. If putting extra money into your mortgage keeps you calm and committed, that has real value.
The Female Case for Running the Numbers
I want to be direct about something. Women are disproportionately likely to prioritize debt elimination over investing. Partly because of risk aversion that's been socialized into us. Partly because debt carries more social stigma for women than for men. And partly because "paying off your house" has been presented to us as the pinnacle of financial success.
But the wealth gap between men and women isn't just about earning less. It's also about investing less. Staying in cash or paying down low-cost debt longer than necessary, when we have decades of investing runway, is a real contributor to that gap.
Running the numbers doesn't mean ignoring your gut. It means giving your gut accurate information to work with.
The Decision Framework: How to Choose which You Pay First
Here's how I think about this for most Canadian homeowners in 2026.
STEP 1: CHECK YOUR MORTGAGE RATE.
Below 4%? The math strongly favors investing. At or above 5-6%? The calculus starts to shift. The higher your rate, the more attractive guaranteed debt elimination becomes.
STEP 2: CAPTURE ANY EMPLOYER RRSP MATCH.
If your employer matches RRSP contributions, that match is an instant 50-100% return. It beats your mortgage rate by a mile. Always take the full match before paying down any debt.
STEP 3: MAX OUT REGISTERED ACCOUNTS FIRST.
Before any extra mortgage payments, capture your full TFSA and RRSP room. The tax advantages change the comparison significantly. If you have unused TFSA room, filling it before making extra mortgage payments is almost always the stronger mathematical move.
STEP 4: CONSIDER A HYBRID APPROACH.
Split your extra monthly dollars: half to your mortgage, half to your TFSA. You get some of the psychological benefit of debt reduction and some of the mathematical benefit of compound growth. Many people find this more sustainable than going all-in on one approach.
STEP 5: KNOW YOUR RENEWAL DATE.
If you're renewing in 2026, your rate is likely meaningfully higher than before. This is the moment to model the actual numbers with your specific mortgage balance, rate, and timeline.
Track your mortgage and investments side by side with Janine's Net Worth Tracker here →
Frequently Asked Questions
Is it better to pay off your mortgage or invest in Canada?
Mathematically, for most Canadians with a mortgage rate below 6%, investing beats paying down the mortgage over a long time horizon. A 4% guaranteed return (eliminating mortgage debt) compared to the approximately 7-9% historical average return of a diversified index fund, compounded over 25 years, produces a very significant gap in favour of investing — potentially $432,000 or more. However, this assumes you actually invest the money and can tolerate market volatility. Registered accounts (TFSA, RRSP) strengthen the investing case further for Canadians.
How much do you save by paying off your mortgage early in Canada?
It depends on your balance, interest rate, and how many years you accelerate by. Putting an extra $500/month toward a $400,000 mortgage at 4% can reduce your amortization by several years and save tens of thousands in interest. But that same $500/month invested in a diversified ETF inside a TFSA at an 8% average annual return for 25 years produces a significantly larger outcome; the gap can easily reach hundreds of thousands of dollars.
Should I put extra money in my TFSA or pay off my mortgage in Canada?
For most Canadians with mortgage rates below 5-6%, maxing your TFSA before making extra mortgage payments is the stronger mathematical choice. Investment growth inside a TFSA is completely tax-free, and over long periods, the compound growth advantage over your mortgage interest rate is substantial. If you have unused TFSA contribution room, filling it should come before extra mortgage payments in most cases.
What is the mortgage renewal mistake Canadians are making in 2026?
Many Canadians renewing in 2026 are instinctively choosing shorter amortization terms or larger prepayments, spooked by higher rates. The mistake is redirecting every available dollar to mortgage paydown without first maximizing TFSA and RRSP contributions. The registered accounts offer tax advantages that meaningfully change the comparison in favour of investing.
Is it worth making extra mortgage payments in Canada?
Extra mortgage payments guarantee a return equal to your mortgage rate — at 4%, that's a guaranteed 4% return. For Canadians who have already maximized their TFSA and RRSP room, or who are genuinely risk-averse, extra mortgage payments are a reasonable choice. But for most Canadians with unused registered account room and a mortgage rate below 5-6%, the evidence favours investing before making extra mortgage payments.
What is the difference between paying off your mortgage early vs. investing?
Paying off your mortgage early earns a guaranteed return equal to your mortgage interest rate (typically 4-6% in Canada currently). Investing in a diversified index fund has historically returned approximately 7-10% annually over long periods, though with more year-to-year volatility. Over a 25-year time horizon, the difference between these return rates compounds dramatically which is why the gap between the two strategies can reach six figures.
Does paying off my mortgage reduce my net worth?
No, paying off your mortgage increases your net worth by reducing your liabilities. But it concentrates your net worth in your home, which is illiquid. Keeping money in your mortgage while building a diversified investment portfolio results in more liquid, more diversified net worth over time, even if it means carrying mortgage debt longer.