How Landlords With Variable-Rate Mortgages Should Respond When Prime Rate Stays Flat

Fact-checked by the Prime Rate editorial team

Canada’s prime lending rate sits at 4.45%, unchanged through four consecutive Bank of Canada decisions since October 2025, according to Ratehub’s June 2026 prime rate tracker. For any landlord carrying a prime rate landlord variable mortgage, that stability is real, but it is not the same as safety. A flat rate means your payment hasn’t moved. It does not mean the next move is down.

The policy environment that produced this hold is genuinely unusual. Canada entered a technical recession in Q1 2026 while headline inflation pushed toward 3%, driven by energy shocks. The Bank of Canada is holding because the economy is soft, but it has said publicly that a hike may still be needed if energy-driven inflation becomes persistent. This article maps what that means for landlords: which mortgage structure puts you at greatest risk, what the flat-rate window actually allows you to do, and how to approach a renewal decision with honest math rather than optimism.

What a Flat Prime Rate Actually Means for Your Rental Mortgage

A flat prime rate means your payment hasn’t increased, not that your cost has dropped. That distinction matters more for landlords than for owner-occupiers, because rental income is a business, and the math has to work every month regardless of what the Bank of Canada does next.

Here is the mechanical chain: the Bank of Canada sets its overnight policy rate, currently at 2.25%. Canada’s major chartered banks (including RBC, TD, Scotiabank, BMO, and CIBC) then set their prime rate at the overnight rate plus approximately 2.20 percentage points, hence the current prime rate of 4.45%. A landlord’s variable mortgage rate is typically expressed as prime minus a lender discount, often between 0.75% and 1.25%, depending on the deal negotiated at origination. So a mortgage at prime minus 1.00% gives an effective rate of 3.45% today. When prime holds flat, that effective rate holds flat too.

The Stagflationary Backdrop You Cannot Ignore

The reason prime has been flat since October 2025 is not encouraging. Canada is in a technical recession, GDP contracted in Q1 2026, while inflation is running close to 3%, pushed higher by energy price shocks following a global oil supply disruption in late 2025. That combination, slow growth alongside rising prices, is precisely the condition that makes central banks reluctant to cut and reluctant to hike. It is an uncomfortable stalemate.

For landlords, this context means the flat rate is fragile. The Bank of Canada’s April 2026 rate decision statement explicitly flagged that a hike may be needed if energy-driven inflation proves persistent. That is not boilerplate language. It is a conditional warning with a near-term trigger most landlords have not priced into their budgets.

The Two Types of Variable Mortgage and Why Landlords Must Know the Difference

Not all variable mortgages behave the same way when rates move. Confusing the two products is the single most common mistake landlords make when assessing their rate-hike exposure.

An Adjustable-Rate Mortgage (ARM) has a payment that moves up or down with every prime rate change. If prime rises by 0.25%, your monthly payment rises immediately. The upside: you always know exactly how much of each payment goes to interest and how much to principal. The downside: your cash flow from the rental property must absorb every rate move in real time.

The Hidden Risk in Fixed-Payment Variable Mortgages

A Variable-Rate Mortgage with a fixed payment (VRM) keeps your monthly payment constant even as rates change. When rates rise, more of that fixed payment goes to interest and less to principal. When rates fall, the reverse happens. On the surface, this looks safer for landlords who want predictable monthly outflows. But there is a critical catch: the trigger rate.

If rates rise enough that your fixed payment no longer covers the interest portion of the mortgage, the lender can force an immediate payment increase or demand a lump-sum repayment. This is not a theoretical scenario. Thousands of Canadian borrowers hit this trigger during the 2022–2023 hiking cycle, when the Bank of Canada raised rates by 4.25 percentage points in roughly 18 months.

OSFI’s Annual Risk Outlook for 2026–2027 specifically flags elevated delinquencies in variable-rate fixed-payment mortgages as one of the top risks in Canada’s financial system. Landlords holding VRMs should calculate their trigger rate today, before any hike is announced. Knowing that number is not optional; it is the first line of defense.

For context on how prime rate movements ripple through different debt products, see our explainer on how the prime rate affects your mortgage and home equity loan.

Why ‘Prime Holds Flat’ Is Not a Signal to Relax

Four consecutive rate holds can create a psychological anchor. Landlords start to treat the current rate as the baseline, not as a temporary pause. That is precisely the moment when rate risk is most underpriced.

Scotiabank projects three additional 25-basis-point hikes in the second half of 2026. Financial markets, are pricing in at least one hike by year-end. A cumulative 0.75% increase would push the prime rate from 4.45% to 5.20%. A landlord at prime minus 1.00% would see their effective rate move from 3.45% to 4.20%, a meaningful shift on any meaningful balance.

The Energy Inflation Signal to Watch

The BoC has stated it will not allow energy-driven inflation to become entrenched. That is a commitment with teeth. If oil remains above roughly $90/barrel and core inflation continues climbing, a rate hike announcement could arrive with little lead time, perhaps six to eight weeks between signal and action, based on the pace of the 2022 hiking cycle.

There is also a macro risk that most landlord-focused commentary ignores entirely: the CUSMA (Canada-United States-Mexico Agreement) mandatory review period begins in July 2026. Trade uncertainty from that review has already introduced volatility into Canadian bond yields, which directly affects the pricing of fixed-rate mortgages. A landlord deciding between variable and fixed today is making that decision against a backdrop of genuine yield uncertainty, and the flat prime rate masks that underlying movement.

The Flat-Rate Window: Smart Moves to Make Right Now

Payment stability is a resource. The question is whether you spend it or invest it.

The most direct use is accelerated principal paydown. Most Canadian variable mortgages allow annual lump-sum prepayments of 10%–20% of the original balance without penalty. In a flat-rate environment, every extra dollar applied to principal reduces the outstanding balance on which future interest is calculated. If rates rise by 0.75%, a lower principal means a smaller dollar increase in monthly interest. The math is straightforward; the discipline to act on it during a calm period is harder.

Building a Stress-Test Reserve That Actually Earns

Consider a concrete example. A landlord holds a $600,000 variable mortgage at an effective rate of 3.45% (prime minus 1.00%). Monthly interest on that balance runs approximately $1,725. A 0.75% hike would push the effective rate to 4.20%, raising the monthly interest cost to approximately $2,100, a difference of roughly $375/month, or $4,500/year. That is the number a landlord should be holding in reserve.

Rather than leaving that buffer in a chequing account, park it in a high-yield savings account or a short-term GIC., competitive high-interest savings rates in Canada sit between 4.0% and 4.5%, which means the reserve itself generates meaningful income while it waits. The flat-rate pause is the right moment to set this up, not after a hike is announced.

One more move most landlords miss: review the lender-discount component of the mortgage rate now, before renewal. Lenders have been known to quietly widen the spread between prime and the borrower’s effective rate at renewal when the rate environment has been flat for an extended period, it protects their margins without triggering a visible rate hike. If your renewal is within 120–180 days, shopping your discount terms across brokers and competing banks is one of the few levers entirely within your control.

Should a Landlord Lock Into a Fixed Rate While Prime Is Flat?

The break-even answer is precise:, the best variable rates sit around 3.30%–3.45%, while the best five-year fixed rates are approximately 4.00%–4.30%. That spread of 50–90 basis points means a landlord would need two to four additional 25-bp hikes before locking in at today’s fixed rate would have been the better financial decision.

That threshold is defensible enough to take a clear position. Staying variable makes sense today, but with active risk management. The break-even is not comfortable if Scotiabank’s three-hike forecast proves correct, a cumulative 0.75% rise gets you close to parity, but it still requires the full hiking scenario to materialize before the fixed rate wins on pure cost.

The After-Tax Landlord Calculus Most Articles Miss

Here is the angle almost no competitor content addresses: landlords can deduct mortgage interest as a business expense against rental income. That changes the net cost comparison between a 3.45% variable and a 4.20% fixed in ways that genuinely shift the break-even analysis. A landlord in the 40% marginal tax bracket paying 4.20% on a fixed mortgage has an after-tax interest cost of approximately 2.52%. The same landlord at 3.45% variable pays an after-tax cost of roughly 2.07%. The pre-tax spread of 0.75% compresses to about 0.45% after the deduction, meaning the fixed rate’s apparent safety comes at a smaller net cost than it first appears, but also that the variable rate’s advantage is similarly reduced.

The practical implication: for a landlord in a high marginal bracket, staying variable through one or two hikes may still be cheaper on an after-tax basis than locking in now. This is worth running through with a tax advisor before making the fixed-vs-variable decision. For broader context on how rate movements affect different financial products, our piece on how the prime rate affects personal loan rates covers the same mechanical relationship in another context. And if you are thinking about how to budget for a potential payment increase, a solid monthly budget framework is the right foundation.

One honest caveat: if a rental property only breaks even at current effective rates, meaning there is no margin between rental income and total carrying costs, then the after-tax deduction advantage is largely irrelevant. In that situation, the certainty of a fixed rate now is worth the premium, because a 0.75% hike could push the property into negative cash flow before the next rent increase is possible. The national vacancy rate reaching 3.1% in 2025, per CMHC’s 2025 Rental Market Report, means landlords cannot assume they can raise rents quickly enough to compensate. In Ontario, for example, the annual rent increase guideline caps what landlords can charge existing tenants, a fixed ceiling that makes a variable mortgage floor particularly dangerous when the two numbers move toward each other.

Understanding how prime rate moves affect credit products more broadly, including home equity lines of credit that many landlords use for property improvements, is covered in our guide on how the prime rate affects your interest rates.

Frequently Asked Questions

What is Canada’s prime rate?

Canada’s prime rate is 4.45%, unchanged since October 2025. The Bank of Canada held its overnight policy rate at 2.25% for a fourth consecutive decision in April 2026, citing a combination of weak economic growth and rising energy-driven inflation as the reason for the hold.

How does a flat prime rate affect a landlord’s variable mortgage payment?

A flat prime rate means a landlord’s variable mortgage rate stays exactly where it is, because variable rates are priced as prime minus a lender discount. On an adjustable-rate mortgage, the payment amount stays fixed. On a variable-rate mortgage with a fixed payment, the split between interest and principal also stays fixed. The payment does not drop unless the prime rate drops.

What is a trigger rate, and why does it matter for landlords on variable mortgages?

A trigger rate is the interest rate at which a fixed-payment variable mortgage’s monthly payment no longer covers the interest owing on the loan. When a mortgage hits its trigger rate, the lender can require an immediate payment increase or a lump-sum repayment to bring the amortization back on schedule. Landlords on variable-rate fixed-payment mortgages should calculate their own trigger rate now, before any hike announcement, so they know exactly how many rate increases they can absorb without a forced payment change.

Should a landlord lock into a fixed rate while prime is flat?

The break-even threshold requires two to four additional 25-bp hikes before locking in at today’s best five-year fixed rate (around 4.0%–4.3%) would outperform the current best variable rate (around 3.3%–3.45%). For landlords who can deduct mortgage interest as a business expense, the after-tax break-even shifts further in favor of staying variable. The exception is any property that barely covers its costs at current rates, for those, the certainty of a fixed rate is worth the premium.

Can landlords use variable mortgage interest as a tax deduction in Canada?

Yes. Mortgage interest on a property held as a rental investment is a deductible business expense against rental income in Canada, per the Canada Revenue Agency’s rules on rental income deductions. This deduction meaningfully changes the after-tax cost comparison between a variable and a fixed mortgage rate, a nuance that most generic mortgage advice does not address for the landlord context specifically.

What happens to a landlord’s cash flow if prime rises 0.75%?

On a $600,000 variable mortgage at an effective rate of 3.45%, a 0.75% rate hike raises the effective rate to 4.20%, increasing monthly interest costs by approximately $375, or about $4,500 per year. On a $400,000 balance, the same hike adds roughly $250/month. Landlords should treat the current flat-rate period as the right moment to build a cash reserve equal to at least 12 months of that stress-test payment difference.

What is the difference between an ARM and a VRM for rental property owners?

An Adjustable-Rate Mortgage (ARM) adjusts the payment amount with every prime rate change, so the landlord’s monthly outflow rises immediately when rates rise. A Variable-Rate Mortgage (VRM) keeps the payment fixed but shifts the interest-to-principal ratio, which creates trigger rate risk if rates rise far enough. For rental property owners, the ARM is more cash-flow transparent; the VRM can mask accumulating interest exposure until a lender forces a correction. OSFI has flagged VRMs specifically as a systemic concern in its 2026–2027 risk outlook.