# When Breaking Your Fixed Mortgage to Go Variable Saves Six Figures
A 47-year-old landlord in Hamilton with a $940,000 portfolio called in May. He'd locked five properties into 5-year fixed mortgages at 4.19% in early 2024. Variable rates sat at 5.8% then. No one questioned the decision.
By June 2026 the math had flipped. Best 5-year variable: 3.35%. Best 5-year fixed: 4.04%. A 69 basis point spread and the first time in three years that variable mortgages cost measurably less than fixed. The Hamilton investor wanted to know if breaking early made sense.
The answer depends on penalty structure, time remaining, and portfolio size. For him it did. For a single-property owner with 18 months left on a 2.1% fixed from 2021, it does not. The decision tree is narrow but the savings when you're on the right side run into six figures.
Why the Spread Opened
Bank of Canada held its policy rate at 2.25% through the first half of 2 The Hamilton investor's mortgage was signed 27 months ago at 4.19% fixed. Three years left on the term. On a $940,000 portfolio split across five properties, that's roughly $188,000 average per property. His monthly interest at 4.19% on the full balance runs about $3,283. At 3.35% variable, it drops to $2,621. Monthly savings: $662. Annual savings: $7,944. Over the remaining three years: $23,832.
The penalty to break a fixed mortgage before maturity is the greater of three months' interest or the Interest Rate Differential (IRD). The IRD is the difference between your contracted rate and the lender's current rate for the remaining term, applied to your remaining balance. For the Hamilton landlord, the IRD works out to roughly $7,100 across all five mortgages. Three months' interest would be about $9,850. He pays the higher number. So: $9,850 to exit, $23,832 saved. Net gain over three years: $13,982. That's before compounding the monthly cash flow improvement into new acquisitions or paydowns.
Now the opposite case. A Toronto condo owner bought in early 2021, locked in a 5-year fixed at 2.1% when rates were in the basement. She has 18 months remaining on the term. Balance: $420,000. Monthly interest at 2.1%: $735. At today's 3.35% variable: $1,174. Monthly cost increase: $439. Over 18 months: $7,902 more expensive. The penalty to break would be roughly $5,200 IRD (current rates are higher than her 2.1%, so the differential is wide). She'd pay $5,200 to increase her interest cost by $7,902. Nonsensical.
The decision boundary sits somewhere between those two scenarios, and it isn't just about rate spreads. It's about the structure of the exit cost and the time you have left to recoup it.
The Penalty Math That Actually Matters
Fixed-rate mortgages in Canada typically allow prepayment penalties calculated as the greater of three months' interest or IRD. The three-month figure is straightforward. The IRD is where lenders extract value.
The IRD formula: take your original rate minus the lender's current posted rate for a term equal to your remaining time, multiply by your remaining balance and remaining months, divide by twelve. Most lenders use their posted rate for this calculation, not the discounted rate you'd actually get as a customer today. Posted rates in June 2026 for a 3-year term sit around 5.5%, even though the best negotiated 3-year fixed a new borrower can get is closer to 4.0%. That spread inflates the penalty.
For borrowers who locked in during 2024 at rates between 4% and 5.5%, the IRD is often less punishing than it was for those who locked in during 2021-2022 at sub-3% rates. The Hamilton investor signed at 4.19%. The lender's current 3-year posted rate is 5.5%, but his discount from the posted rate when he originally signed brings the effective comparable rate closer to 3.9%. His IRD is modest. Someone who signed at 2.1% in 2021 faces a wide differential because today's rates, even after falling, remain well above that level.
This is why timing matters more than rate environment. Breaking a 2.1% mortgage to get 3.35% is expensive even when 3.35% sounds cheap. Breaking a 4.19% mortgage to get 3.35% starts to make sense.
Two Ways This Pays Off
The first payoff is immediate: monthly cash flow. Real estate investors operate on debt service coverage ratios. A $940,000 portfolio throwing off $6,500 in rental income with $3,283 in monthly interest (at 4.19%) and another $1,800 in principal, property tax, insurance, and maintenance has workable but not comfortable margins. Drop the interest to $2,621 and suddenly there's $662 more per month to either buffer against vacancy, fund capital improvements, or cover the carry cost on the next acquisition.
The second payoff is positional. Variable-rate mortgages in Canada carry a maximum three-month interest penalty on early exit. If the investor in Hamilton wants to sell one of the properties or refinance to pull equity in 18 months, the exit cost is calculable and capped. A fixed mortgage carries the IRD risk again. For someone planning to move capital around, common in portfolios with multiple properties, variable offers structural flexibility that fixed does not.
This is less relevant for a primary-residence owner planning to hold the mortgage to term. It's highly relevant for someone running a portfolio where the optimal hold period for any given property might be shorter than five years.
The Counterfactual No One Prices
Variable rates are cheaper than fixed today because the Bank of Canada's overnight rate is stable at 2.25% while bond markets are pricing geopolitical risk into longer-term yields. The 5-year Government of Canada bond yield sits near 3.3%, well above where it would be if the market expected smooth sailing. Fixed mortgage rates track bond yields. Variable rates track the BoC's policy rate plus a spread.
That setup is unusual. For most of the last 15 years, fixed was cheaper because bond markets expected rate cuts that didn't materialize, or did materialize slowly. The inversion we saw from 2023 through early 2026, where fixed was significantly cheaper than variable, was the market pricing in rapid BoC cuts. The cuts happened, but not fast enough to make variable the better bet during that window.
Now the yield curve has normalized. Variable is priced below fixed. That condition holds as long as the BoC stays at 2.25% and bond yields stay elevated. If the BoC hikes 50 basis points in response to an inflation surprise, the variable holder at 3.35% is suddenly paying 3.85%, erasing most of the advantage. If bond yields fall because geopolitical tensions ease, the fixed holder at 4.04% looks worse as new fixed rates drop into the mid-3% range.
Betting on variable today is a bet that the BoC holds or cuts and that you'll have time to lock in if they signal a hiking cycle. For a landlord with multiple properties and strong cash flow, that's a manageable risk. For someone with minimal payment buffer, less so.
When the Recommendation Flips
Three conditions make breaking to go variable a reasonable move. First, your remaining term is long enough to recoup the penalty, generally 24 months minimum unless the penalty is unusually low. Second, your contracted fixed rate is high enough that the spread between it and today's variable rate is at least 60 basis points. Below that, the savings are too thin relative to execution costs (legal fees, appraisal, discharge fees). Third, your cash flow can absorb a 100-basis-point increase in the variable rate without creating a coverage problem. If a move from 3.35% to 4.35% would push you into negative monthly cash flow, the trade is too fragile.
The recommendation flips to "stay fixed" when any of those conditions fail. It also flips if you're holding a sub-3% fixed rate from 2020, 2021 with less than two years remaining. The penalty math doesn't work and the risk of variable rising above your locked rate is real.
For the Hamilton investor: break, go variable, bank the $662 monthly, and monitor the BoC's quarterly rate announcements. For the Toronto condo owner at 2.1%: ride it out, refinance at maturity, don't pay to make your rate worse. The decision isn't about whether variable is "better" in the abstract. It's about whether the penalty is an investment or a cost.
