“Should I go fixed or variable?”
I get asked this question more than any other. And honestly, I used to give the wrong answer. I’d try to predict where rates were heading. Sometimes I was right. Sometimes I wasn’t. And the times I was wrong cost people real money.
So I stopped trying to predict rates. Instead, I built a framework. A set of decision rules that work regardless of where rates go next. That’s what I’m sharing with you today—not a prediction, but a system for making smart rate decisions across your entire portfolio.
Because here’s the thing most investors miss: the fixed-versus-variable question isn’t a one-time decision. It’s a portfolio-level strategy. And the answer for property number one might be completely different from the answer for property number five.
The Yield Curve: Your Most Useful Tool (Explained Simply)
Before I give you the framework, you need to understand one concept: the yield curve. Don’t tune out—I’m going to make this painless.
The yield curve is just a chart showing interest rates at different time periods. Take the Government of Canada bond yields: 1-year, 2-year, 3-year, 5-year, 10-year. Plot them on a chart. That line is the yield curve.
Normally, the line slopes upward. A 5-year bond pays more interest than a 1-year bond because you’re locking up your money longer. This is called a “normal” yield curve. When the curve looks like this, the bond market is telling you: “Things are fine. Rates might go up slowly, but nothing dramatic.”
Sometimes the line flips—short-term yields are higher than long-term yields. This is an “inverted” yield curve. It means the bond market expects rates to drop. Traders are accepting lower long-term yields because they believe short-term rates will come down significantly.
And sometimes the line is flat. Short and long-term yields are about the same. This usually happens during transitions—the market is uncertain about direction.
Here’s how this matters for your mortgage decision:
| Yield Curve Shape | What It Signals | Mortgage Implication |
|---|---|---|
| Normal (upward slope) | Stable or gradually rising rates | Variable may cost less short-term; fixed for certainty |
| Inverted (downward slope) | Market expects rates to fall | Variable likely to win as rates drop |
| Flat | Uncertainty, transition period | Fixed and variable are similarly priced; fixed gives certainty at little extra cost |
| Steep (sharply upward) | Market expects significantly higher rates | Lock in fixed now before rates climb |
In Canada, you can check the yield curve on the Bank of Canada website any time. They publish daily bond yield data. Just compare the 1-year yield to the 5-year yield. If the 5-year is higher, the curve is normal. If the 1-year is higher, it’s inverted. Simple as that.
During 2023, Canada’s yield curve was deeply inverted—the 1-year bond yield was around 5.3% while the 5-year was at 4.1%. The market was screaming that rates would fall. And they did. Investors who paid attention to that signal and chose variable rates benefited from the subsequent rate cuts.
So how do you apply this to your mortgage decision? Simple. Before you sign anything, check the curve. If it’s inverted, the bond market is pricing in rate cuts. Variable rates are likely to fall during your term. That’s a tailwind. If the curve is normal or steepening, the market expects rates to hold or climb. Fixed locks in your cost before that happens.
Here’s the rule:
Inverted curve: Lean variable. Rate cuts are coming.
Normal or steep curve: Lean fixed. Lock in before rates move up.
Flat curve: The market is undecided. Let factors 1, 2, and 4 make the call for you.
Rate Hold Strategies: Free Insurance
Before I get into the main framework, let me cover a tactic that every investor should use: the rate hold.
When you get a mortgage pre-approval, most lenders will guarantee your rate for 90-120 days. This is free. You pay nothing for this protection. If rates go up during that period, you keep the lower rate. If rates go down, the lender gives you the lower rate instead.
This is a one-way bet in your favour. There is zero reason not to have a rate hold in place whenever you’re actively looking at properties.
Here’s how to use rate holds strategically:
Stack rate holds. Get pre-approved with two or three different lenders. Each one gives you a separate rate hold. Now you have the best rate from multiple lenders locked in, plus the downside protection of keeping the lower rate if markets move against you.
Refresh rate holds. If your 120-day hold is about to expire and you haven’t bought yet, apply for a new one. Rates may have changed—sometimes in your favour. A new hold captures the current rate and gives you another 120 days.
Use rate holds at renewal. When your existing mortgage is up for renewal, your lender will typically offer renewal terms 120 days in advance. Get that offer in writing, then immediately shop other lenders. You now have your existing lender’s offer as a floor while you negotiate better terms elsewhere. If market rates drop before your renewal date, ask for a re-quote.
Rate holds on investment properties. Some lenders are stingier with investment property rate holds, offering only 90 days instead of 120. Know which lenders offer the longest holds and plan your purchase timeline accordingly.
The Framework: Four Decision Factors
OK, here’s the framework. When you’re deciding between fixed and variable (or choosing your term length), run through these four factors. Each one pushes you toward fixed or variable.
Factor 1: Cash Flow Margin
How much breathing room does your property have? Take your monthly cash flow after all expenses (mortgage, taxes, insurance, maintenance, management, vacancy allowance) and ask: what happens if my rate goes up 1.5-2.0%?
If a rate increase of 1.5% would put you into negative cash flow, you need certainty. Go fixed. You can’t afford to be wrong.
If your property cash flows $500+/month and a rate increase would still leave you positive, you can afford the risk of variable. Your cash flow cushion absorbs rate volatility.
Fixed-rate threshold: Cash flow margin under $200/month per property. You need predictability.
Variable-rate threshold: Cash flow margin over $400/month per property. You can handle swings.
Grey zone: $200-$400/month. Consider a shorter fixed term (2-3 years) as a compromise.
Factor 2: The Rate Spread
What’s the difference between the best fixed rate and the best variable rate available to you right now?
In a normal market, variable rates are 0.50-1.00% lower than 5-year fixed rates. That discount compensates you for taking on rate risk. If the spread is wider—say 1.25%+—variable becomes very attractive because you’re getting a significant upfront savings. If the spread narrows to under 0.25%, the savings from variable are minimal, and you might as well take the certainty of fixed.
Here’s a quick history of how the spread has moved:
| Period | Best 5-Year Fixed | Best Variable | Spread |
|---|---|---|---|
| Early 2020 | 2.69% | 2.05% | 0.64% |
| Late 2022 | 5.14% | 5.50% | -0.36% (variable more expensive!) |
| Mid 2023 | 5.59% | 6.30% | -0.71% |
| Early 2025 | 4.34% | 4.20% | 0.14% |
| Early 2026 | 4.14% | 3.80% | 0.34% |
Notice something interesting? In late 2022 and 2023, variable rates were actually higher than fixed rates. This is unusual and happened because the overnight rate spiked above bond yields. In that environment, fixed was the obvious choice—lower rate AND certainty. Those are rare moments, and investors who locked in fixed during those windows did very well.
Go variable when: Spread is 0.75%+ in your favour. The savings are meaningful.
Go fixed when: Spread is under 0.25%, or variable is more expensive. The certainty costs you almost nothing.
Factor 3: Yield Curve Direction
I explained the yield curve earlier. Now here’s how to use it in your decision.
If the yield curve is inverted or flattening, the bond market expects rates to fall. This favours variable because you’ll likely benefit from future rate cuts. You get the lower rate today and it probably gets even lower tomorrow.
If the yield curve is normal and steepening, the market expects rates to stay stable or rise. This favours fixed because you lock in before rates climb.
Check the yield curve before every mortgage decision. It takes two minutes. Go to the Bank of Canada website, find the daily bond yields, compare the 1-year to the 5-year. That simple comparison tells you what the smartest money in the room thinks is coming.
Inverted curve: Favours variable. Market expects rate drops.
Normal/steep curve: Favours fixed. Market expects stability or rate increases.
Flat curve: Neutral. Decide based on other factors.
Factor 4: Your Portfolio Context
This is the factor most investors completely ignore, and it’s arguably the most important one.
This is the factor most investors completely ignore, and it’s arguably the most important one.
If this is your only property, the decision is simpler—choose based on factors 1-3. But if you have three, five, or ten properties, you need to think about your overall rate exposure.
Are all your mortgages variable? Then you’re 100% exposed to rate increases. One property should go fixed to reduce concentration risk.
Are all your mortgages fixed with the same renewal date? Then you’re exposed to renewal risk—what if rates spike right when all your mortgages renew? Stagger your terms so renewals are spread over different years.
The ideal portfolio has a mix. Here’s a framework:
| Portfolio Size | Suggested Fixed/Variable Mix | Why |
|---|---|---|
| 1-2 properties | 100% based on factors 1-3 | Not enough diversification to blend |
| 3-5 properties | 50-60% fixed, 40-50% variable | Start building a balanced mix |
| 6-10 properties | 40-50% fixed, 50-60% variable | More properties = more ability to absorb variable rate swings |
| 10+ properties | 30-40% fixed, 60-70% variable | Cash flow from many properties smooths out volatility |
As your portfolio grows, you can handle more variable-rate exposure because the law of large numbers works in your favour. One property’s variable rate spiking is a problem. Ten properties averaging out rate changes across different renewal dates and rate types is manageable.
When Variable Actually Wins: The Historical Evidence
Here’s something the data clearly shows: over the full life of most mortgage terms, variable rates have outperformed fixed rates the majority of the time.
A landmark study by Moshe Milevsky at York University found that from 1950 to 2007, Canadian borrowers with variable-rate mortgages paid less interest than fixed-rate borrowers about 77% of the time. That’s a powerful statistic.
But—and this is a big “but”—the 23% of the time that fixed won, the savings were often enormous. The periods when fixed outperformed tended to be during sudden rate spikes, and the cost of being wrong on variable during those periods was severe.
More recent data tells a similar story. Investors who went variable in 2020 at rates around 1.50% were initially happy, but then watched their rates climb to 6.50%+ by 2023. That’s a devastating swing if your cash flow couldn’t absorb it. By contrast, investors who locked in 5-year fixed at 2.69% in early 2020 sailed through the entire hiking cycle without losing a dollar of cash flow.
The lesson isn’t that variable always wins. The lesson is that variable wins more often, but fixed protects you when it matters most. That’s why the framework approach beats picking one or the other.
Forward-Looking Indicators to Watch
Beyond the yield curve, here are the specific indicators I check before making or recommending a rate decision:
Bank of Canada forward guidance. After each rate announcement, the Bank publishes a statement and the Governor holds a press conference. Listen to the language. Words like “further adjustments may be necessary” signal more changes. “Holding steady to assess” signals a pause. The Bank doesn’t always do what it says, but its language gives you a directional bias.
Canadian CPI trends. Inflation is the Bank of Canada’s primary focus. If CPI is trending down toward 2%, rate cuts are likely. If inflation is sticky above target, rates stay high or go higher. Look at the 3-month moving average of CPI, not just the latest print.
U.S. Federal Reserve decisions. The Bank of Canada doesn’t follow the Fed automatically, but there’s a practical limit to how far Canadian rates can diverge from U.S. rates without causing problems for the Canadian dollar. If the Fed is holding rates high while Canada cuts aggressively, the loonie weakens, which imports inflation. Watch the Fed for context.
Housing market data. The Bank watches the housing market because it’s a huge part of Canada’s economy. If housing is overheating, the Bank is more likely to keep rates higher to cool it. If housing is soft, they have more room to cut. Track monthly sales volumes and average prices from CREA.
Employment data. Rising unemployment gives the Bank cover to cut rates. Strong job growth makes them cautious. Statistics Canada releases monthly Labour Force Survey data on the first Friday of each month. Mark it on your calendar.
Building Your Rate Mix Strategy: A Real Example
Let me walk you through how this works with a real portfolio scenario.
Say you own four rental properties and you’re about to buy a fifth. Here’s your current situation:
| Property | Current Rate | Type | Renewal Date |
|---|---|---|---|
| Property 1 | 4.79% | 5-year fixed | March 2028 |
| Property 2 | 3.95% | Variable | N/A (open) |
| Property 3 | 4.49% | 3-year fixed | June 2027 |
| Property 4 | 4.10% | Variable | N/A (open) |
You’re 50/50 fixed and variable. Two renewals are staggered (2027 and 2028). That’s a decent setup. Now you’re buying property five.
The yield curve is mildly inverted. Variable rates are about 0.40% below fixed rates. Your cash flow on the new property looks solid at $450/month positive.
Using the framework:
- Cash flow margin: $450/month. Above the $400 threshold. Green light for variable.
- Rate spread: 0.40% in favour of variable. Moderate but meaningful.
- Yield curve: Mildly inverted. Favours variable.
- Portfolio context: You’re already 50/50. Adding another variable would put you at 60/40 variable. For a five-property portfolio, that’s reasonable.
Decision: go variable on property five. Three factors point to variable, and the portfolio context supports it.
But what if your cash flow was only $150/month? Factor 1 would flip to fixed regardless of what the other factors say. Cash flow protection overrides everything else.
And what if properties 2, 3, and 4 were all variable and all up for renewal in the same year? Factor 4 would push you toward fixed to reduce portfolio concentration risk.
See how this works? It’s not about predicting rates. It’s about making the right decision for your specific situation using objective criteria.
The Renewal Game Plan
Ready to explore your financing options? Book a free strategy call with LendCity and let our team help you find the right path forward.
Your rate strategy doesn’t end at purchase. Renewals are equally important, and they’re an opportunity most investors waste.
Start shopping 120 days before renewal. This gives you time to get competitive offers and hold rates from other lenders as backup.
Never just sign your lender’s renewal letter. The first offer is almost never the best offer. Lenders count on borrower laziness. Challenge them. Tell them you have better offers. Because you will, if you shop around.
Re-run the framework at each renewal. Market conditions change. Your portfolio has evolved. The right answer five years ago may be wrong today.
Consider term length changes. You don’t have to renew into the same term length. If you had a 5-year fixed and the yield curve now favours shorter terms, switch to a 2 or 3-year fixed. If rates are at historic lows, lock in the longest term available.
Use renewals to rebalance your portfolio mix. If you’ve ended up with too much variable exposure, flip one or two properties to fixed at renewal. If you’re too heavily fixed and the curve favours variable, switch some over. Renewals are your rebalancing opportunity.
Frequently Asked Questions
What is a rate hold and how long does it last?
Can I switch from variable to fixed mid-term?
What is the penalty for breaking a fixed-rate mortgage?
Should I take a shorter or longer fixed term?
How do I check the yield curve?
Does my lender have to give me the best rate at renewal?
What percentage of my portfolio should be variable rate?
How do investment property mortgage rates compare to primary residence rates?
Disclaimer: LendCity Mortgages is a licensed mortgage brokerage. Content on this page is for educational purposes only and does not constitute legal, tax, investment, securities, or financial-planning advice. Rates, premiums, program terms, and regulations referenced are as of the page's last updated date and are subject to change. Any investment returns, rental yields, tax savings, or case-study figures shown are illustrative only — they are not guaranteed, not typical, and individual results will vary. Consult a licensed lawyer, Chartered Professional Accountant, or registered dealer before acting on any information above. Editorial standards.
Written by
LendCity
Published
June 23, 2026
Reading time
14 min read
A Lender
A major bank or institutional lender offering the most competitive mortgage rates and terms but with the strictest qualification criteria, including full income verification and stress test compliance. Most investors use A lenders for their first four to six properties.
ADU
Accessory Dwelling Unit - a secondary residential unit on a single-family property, such as a basement suite, laneway house, garden suite, or in-law suite. ADUs increase rental income and property value while leveraging existing land and infrastructure.
Bank of Canada
Canada's central bank that sets the overnight lending rate, which influences prime rates and mortgage costs across the country. Rate decisions directly impact variable mortgage rates and overall borrowing costs for real estate investors.
Bond Market
The bond market is where government and corporate bonds are bought and sold, and it directly influences Canadian mortgage rates, as lenders typically price fixed-rate mortgages based on Government of Canada bond yields. When bond yields rise, fixed mortgage rates tend to follow, increasing borrowing costs for real estate investors.
Cash Flow Optimization
Cash flow optimization is the strategic process of maximizing the net income generated from a rental property by increasing rental revenue and minimizing operating expenses, mortgage costs, and vacancies. For Canadian real estate investors, this often involves tactics such as selecting the right financing structure, leveraging rental income from multiple units, and managing expenses like property taxes and maintenance to ensure the property generates consistent positive monthly returns.
Cash Flow
The money left over after collecting rent and paying all expenses including mortgage, taxes, insurance, maintenance, and property management. Positive cash flow is the primary goal of buy-and-hold investors. See also [NOI](/glossary/#noi), [Cash-on-Cash Return](/glossary/#cash-on-cash-return), and [Vacancy Rate](/glossary/#vacancy-rate).
Fixed Rate Mortgage
A mortgage where the interest rate stays the same for the entire term, providing predictable monthly payments regardless of market changes.
Interest Rate
The cost of borrowing money, expressed as a percentage. It determines how much you pay on top of the principal borrowed. Interest rates directly affect monthly payments, [cash flow](/glossary/#cash-flow), and [DSCR](/glossary/#dscr). See also [Amortization](/glossary/#amortization).
IRD
Interest Rate Differential - a mortgage penalty calculation based on the difference between your rate and current rates for the remaining term.
ITIN
Individual Taxpayer Identification Number - a US tax ID for foreign nationals, required for Canadians to invest in US real estate and file US taxes.
Hover over terms to see definitions. View the full glossary for all terms.