Mortgage Comparison
Fixed vs. Variable Rate Mortgage: Which Makes More Sense for Canadian Investors?
The fixed vs. variable question isn't just about rates — it's about your risk tolerance, your hold strategy, and what happens when you need to exit. Here's the complete picture for Canadian real estate investors.
How Fixed-Rate Mortgages Work
A fixed-rate mortgage locks your interest rate for the duration of the term — typically 1, 2, 3, or 5 years in Canada, with 5-year terms being the most common. Your rate, payment amount, and the split between principal and interest remain identical every month throughout the term, regardless of what happens to the Bank of Canada's overnight rate or market conditions.
Fixed rates are priced off bond yields, particularly the Government of Canada 5-year bond. When bond yields rise — as they do in anticipation of rate hikes or inflationary pressure — fixed mortgage rates tend to rise ahead of or alongside variable rates. Conversely, when the economy slows and bonds rally, fixed rates can fall before the Bank of Canada formally cuts rates.
At renewal, you return to market and negotiate a new rate based on current conditions. If you need to exit the mortgage before the term ends — to sell the property, refinance, or restructure — you will typically face an Interest Rate Differential (IRD) penalty. At major banks, IRD penalties can be substantial, sometimes exceeding $20,000 on a $500,000 balance in a rising-rate environment.
For investors, fixed rates provide cost certainty. If your underwriting model assumes a specific monthly payment for the next five years, a fixed rate eliminates the risk of that assumption being wrong. This makes fixed rates particularly appealing for properties with tighter cash flow margins.
How Variable-Rate Mortgages Work
A variable-rate mortgage is tied to the lender's prime rate, which moves in step with the Bank of Canada's overnight target rate. In Canada, there are two main structures:
- Adjustable-Rate Mortgage (ARM): Your monthly payment changes as the prime rate changes. When rates rise, your payment increases; when rates fall, it decreases. Your amortization stays on track.
- Variable-Rate Mortgage (VRM): Your payment stays fixed, but the portion going to interest vs. principal shifts with the rate. When rates rise significantly, more of each payment goes to interest — potentially resulting in "negative amortization" where the balance doesn't decrease as expected.
Variable rates are typically expressed as prime plus or minus a spread — for example, "prime minus 0.70%" or "prime plus 0.50%". The spread is negotiated at origination and stays constant throughout the term, even as prime changes.
The key advantage of variable mortgages for investors is the lower penalty for early exit. Breaking a variable-rate mortgage typically costs only three months of interest — a fraction of the IRD penalty attached to most fixed-rate products. If you plan to sell, refinance, or reorganize a property within a few years, this flexibility has real financial value.
Fixed vs. Variable: Key Differences
| Factor | Fixed Rate | Variable Rate |
|---|---|---|
| Rate Stability | Locked for the entire term | Moves with prime rate / Bank of Canada decisions |
| Payment Predictability | 100% predictable — same amount every month | Payment may change (ARM) or stay same with shifting split (VRM) |
| Starting Rate | Typically higher than variable at time of signing | Typically lower at time of signing (historically) |
| Break Penalty | IRD penalty — can be very large | 3 months interest — usually minimal |
| Rate Benchmark | Government of Canada bond yields | Bank of Canada overnight rate → lender prime |
| Conversion Option | Cannot convert to variable mid-term | Can convert to fixed at any time, no penalty |
| Best Rate Environment | Rate hiking cycles or elevated rate environments | Rate cutting cycles or stable/low rate environments |
| Ideal Investor Profile | Buy-and-hold, tight cash flow, risk-averse | Flexible exit strategy, comfortable with fluctuation |
Historical Context: What the Data Shows
Canadian mortgage researchers have studied the fixed-vs-variable debate for decades. The conclusion from most analyses, including research by Dr. Moshe Milevsky at York University, is that variable-rate borrowers have paid less interest over time in the majority of historical periods — roughly 90% of the time when studying rolling 5-year windows.
The explanation is intuitive: the yield curve normally slopes upward, meaning short-term rates (which drive variable mortgages) are lower than long-term rates (which price fixed mortgages). Lenders also charge a premium for the certainty they provide in a fixed product.
However, the 2022–2023 rate hiking cycle was a sharp exception. The Bank of Canada raised rates from 0.25% to 5.00% — 475 basis points in 18 months. Borrowers who had locked into 5-year fixed rates in 2020 or 2021, when rates were at historic lows, largely avoided the pain. Those on variable rates saw payments surge.
By 2024 and into 2025, the Bank began cutting rates again as inflation moderated, closing the spread. This cycle illustrates the core tension: variable almost always wins over the long run, but the exceptions are painful when they occur, and not every investor has the cash flow cushion to absorb temporary surges.
The practical lesson: variable tends to win if you have a five-to-ten-year horizon and can weather short-term volatility. Fixed tends to win if you need certainty for budgeting, plan to hold for less than three to four years, or are operating near your cash flow breakeven.
Break-Even Analysis: The Framework That Actually Matters
The real question isn't "which rate is lower today?" — it's "at what point does the fixed rate cost me more than the variable rate would, even if rates rise?" This is the break-even calculation.
The Break-Even Calculation
If fixed is priced at 5.50% and variable at 4.80%, the spread is 70 basis points. The variable product saves you money until rates rise enough to eliminate that advantage.
On a $500,000 mortgage, 70 bps saves approximately $292/month. If rates rise by 1% and hold there for two years before you renew, the extra cost may or may not exceed what you saved. Run the actual numbers for your balance and term.
The Penalty Factor
IRD penalties on fixed mortgages can wipe out years of interest savings if you need to exit early. A $15,000 IRD penalty offsets any rate advantage you accumulated.
Variable mortgages, with their three-month interest penalty, cost roughly $5,000–$7,000 to break on a $500,000 balance. For investors who refinance, sell, or restructure frequently, this difference is significant.
When Each Makes Sense for Investors
Choose Fixed When...
- — You are in a low-rate environment and want to lock in before rates rise
- — The property has tight margins and variable payments could push you negative
- — You plan to hold the property for the full term without refinancing
- — You want predictable cash flow for financial modelling and tax planning
- — You are near your maximum financing threshold and can't afford payment increases
Choose Variable When...
- — The Bank of Canada is in a rate-cutting cycle or rates are elevated
- — You may need to break the mortgage before the term ends (sell, refi, restructure)
- — The property has strong enough cash flow to absorb a 1–2% rate increase
- — You plan to hold for five or more years and can weather short-term volatility
- — You want the flexibility to convert to fixed if the rate environment changes
Frequently Asked Questions
Has the variable rate ever been higher than the fixed rate in Canada?
Historically, variable rates run lower than fixed rates most of the time — but there are periods when the reverse is true. During the 2022–2023 rate hiking cycle, the Bank of Canada raised its policy rate from 0.25% to 5.00% in just 18 months. Borrowers who had locked in at fixed rates in 2020 or 2021 fared well during that period, while those on variables saw their payments increase sharply. Over multi-decade periods, variable has still tended to outperform fixed on average, but the 2022 cycle was a strong reminder of downside risk.
What is the penalty for breaking a fixed-rate mortgage early?
In Canada, breaking a fixed-rate mortgage typically triggers an Interest Rate Differential (IRD) penalty, which can be substantial. The IRD is calculated based on the difference between your contract rate and the lender's current rate for the remaining term, multiplied by the outstanding balance and time left. For example, breaking a 5-year fixed mortgage three years early at a major bank can result in a penalty of $10,000 to $30,000+. Variable-rate mortgages typically carry only a three-month interest penalty — one reason investors prefer variables despite the rate risk.
Can I convert from a variable to a fixed-rate mortgage mid-term?
Yes. Most variable-rate mortgages in Canada include a conversion option that lets you lock into a fixed rate at any point during your term, without penalty. The catch is you can only convert at the lender's current fixed rates, not the rate you originally qualified at. If rates have risen since you took out your variable, converting locks in a higher rate than you might have gotten initially. The flexibility still makes variable attractive — you can ride a falling rate environment and convert if rates start climbing.
For a rental property, is fixed or variable usually better?
It depends on your investment strategy and cash flow tolerance. Variable rates can maximize monthly cash flow when rates are lower, but they introduce budget uncertainty — your payment can change with every Bank of Canada rate decision. Fixed rates provide predictable costs, which helps with financial modelling and property valuation. Many investors use fixed rates for their core, long-hold properties and accept variable rates on properties with strong enough cash flow margins to absorb payment fluctuations.
What is a hybrid or split-rate mortgage?
A hybrid mortgage splits your balance between a fixed and variable rate — for example, 50% locked at a fixed rate and 50% at a variable rate. This approach hedges your exposure: you benefit partially if rates fall, while limiting your risk if rates rise. Some lenders in Canada offer formal hybrid products; others allow you to structure two separate mortgages on the same property. For investors with multiple properties, another approach is to hold some mortgages fixed and others variable across the portfolio.
How does the Bank of Canada's rate affect my variable mortgage?
Most variable-rate mortgages in Canada are tied to the lender's prime rate, which moves in lockstep with the Bank of Canada's overnight target rate. When the Bank raises or cuts rates, your variable rate adjusts accordingly — usually within the same day or within a few days. If you have an adjustable-rate mortgage (ARM), your payment amount changes. If you have a variable-rate mortgage (VRM), the payment stays the same but the principal/interest split adjusts, potentially extending your amortization if rates rise significantly.
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