Here’s a call I get almost every week in Winnipeg: “Ted, we found a bigger place — but we’ve still got three years left on our mortgage at a rate we’ll never see again. Are we going to get hammered with a penalty?”
It’s a fair worry. A huge number of Manitoba homeowners are sitting on five-year fixed rates of 2% or less that they locked in back in 2021. Now the kids need more room, or a job change means a move across town, and the fear is that touching that mortgage means kissing the rate goodbye and paying a fat penalty on the way out.
The good news: in most move-up situations there’s a way to keep your low rate and avoid a penalty entirely. But to know whether that’s the right move, you need to understand the two paths — porting and breaking — and the math behind each. Let’s walk through it.
First, what actually happens to your mortgage when you move?
When you sell your home and buy another, you have three basic options:
1. Port it. Porting means you take your existing mortgage — same rate, same remaining term, same balance — and move it over to the new property. Your 2.1% doesn’t change. You just re-attach it to a different address.
2. Port and increase (also called “blend and extend”). This is the most common scenario I see, because most people who are moving are buying up. You keep your existing balance at your old low rate, and the extra money you need for the bigger home is added at today’s rate. The two rates get blended into one.
3. Break it. You pay off the old mortgage completely, pay a prepayment penalty, and start a brand-new mortgage — possibly with a different lender. This is the option people fear, but sometimes it’s the right one.
The important thing to know: porting keeps you with your current lender. If you want to move your mortgage to a different lender when you buy, that counts as breaking — and that’s when a penalty comes into play.
How mortgage penalties are actually calculated
If you do break a fixed-rate mortgage in Canada, the penalty is the greater of two calculations:
Three months’ interest. Exactly what it sounds like — three months of interest on your current balance. On a $400,000 balance at 2.1%, that’s roughly:
$400,000 × 2.1% × 3/12 = about $2,100
The Interest Rate Differential (IRD). This one is designed to compensate the lender for the interest they’ll miss out on. Very roughly, it’s the gap between your rate and the lender’s comparison rate for your remaining term, applied to your balance over the time you have left. Be aware that the Big banks calculate IRD using their posted rates minus your original discount — a method that can inflate the penalty well beyond what a monoline or credit union would charge using their actual rates.
Here’s the part that’s genuinely good news for a lot of 2021-era borrowers: IRD only bites when your rate is higher than today’s comparison rate. If you locked in at 2.1% and comparable rates today are near 3.9%, the “differential” runs in your favour — so the IRD calculation comes out to essentially nothing, and your penalty defaults to the smaller three-months’-interest figure. Breaking a rock-bottom rate is often far cheaper than people assume.
(The flip side: if you renewed at a higher rate more recently and rates have since fallen, your IRD could be substantial. This is exactly why you should never guess — always get a payout statement from your lender for the exact number.)
A real Winnipeg move-up example
Let’s make this concrete. Say you’ve got a bungalow in River Heights and you’re moving up to a $550,000 home. Your numbers:
• Current mortgage balance: $400,000
• Your rate: 2.1% fixed, with about 2 years left
• New money needed: $150,000
Option A — Break and start fresh. You’d pay a penalty (in this case roughly $2,100, since your low rate means the IRD is a non-issue), then finance the full $550,000 at today’s rate — call it 3.94%. Simple, but you’ve thrown away your 2.1% on the whole balance.
Option B — Port and increase (blend and extend). You keep your $400,000 at 2.1% and add the new $150,000 at 3.94%. Blended together:
($400,000 × 2.1%) + ($150,000 × 3.94%) = $8,400 + $5,910 = $14,310
$14,310 ÷ $550,000 = a blended rate of about 2.60%
A blended 2.60% versus 3.94% on the entire $550,000 is a difference of roughly $7,000 in interest in the first year alone — and there’s no prepayment penalty, just a small porting admin fee (typically $100–$300). For most move-up buyers, porting-and-increasing is the clear winner.
The fine print on porting
Porting is powerful, but it comes with conditions worth knowing before you fall in love with a new listing:
You have to re-qualify. Porting isn’t automatic. You’ll need to pass the mortgage stress test and prove your income all over again, just like a new application. If your income has dropped or your debts have grown since you first qualified, that’s the piece to sort out early.
There’s a time window. Most lenders give you somewhere between 30 and 120 days to close on the new home after selling the old one. Move outside that window and you may lose the ability to port.
Same lender only. You can only port to a mortgage with your current lender. If a different lender is offering a much better deal on your new purchase, you’ll have to weigh those savings against the penalty to break.
Use your prepayment privilege first. If you do end up breaking, making your annual lump-sum prepayment beforehand shrinks the balance the penalty is calculated on — a simple way to trim the cost.
The bottom line
Moving doesn’t have to mean giving up the best mortgage rate you’ll ever have. In the great majority of Winnipeg move-up situations, porting-and-increasing lets you carry your low rate forward and only pay today’s rate on the new money — no penalty required. But the right answer depends on your exact numbers: your balance, your rate, your remaining term, and how much more you’re borrowing.
Before you list your home or make an offer on the next one, let’s run your actual numbers side by side so you know exactly what porting versus breaking would cost you. It takes about ten minutes and it can save you thousands.
Call me at 204-890-2446 or email ted@tedvailas.com, and we’ll map out the smartest way to bring your mortgage along for the move.
Rates and figures used above are illustrative examples current as of July 2026 and will vary by lender and by your individual situation. Always request a payout statement from your lender for your exact penalty.