Porting vs Breaking Your Mortgage When Moving in Vancouver (2026)

Last spring a couple sat across from me, keys to their first condo in hand, ready to move up to a townhouse for the kids. They had done everything right. Pre-approved at a new bank, down payment sorted, a list of three places they loved. Then I asked the question nobody had asked them yet: what’s the penalty to get out of your current mortgage?

Blank looks. They had no idea their mortgage even had a penalty, let alone how much.

This is one of the most expensive blind spots I see in Vancouver. People focus on the new purchase and forget that the loan on the home they’re selling has rules attached. Sometimes you carry that loan with you to the new place. Sometimes you pay to walk away from it. Getting this wrong can cost more than the movers, the lawyer, and the inspection combined.

Here’s how it actually works, in plain terms.

What porting a mortgage really means

Porting means you take your existing mortgage — same rate, same remaining balance, same maturity date — and move it to the home you’re buying. You don’t break the contract, so there’s no penalty. On paper it sounds simple. In practice there are three things that trip people up.

You still have to re-qualify

Carrying your old rate doesn’t mean the lender skips the paperwork. When you port, the bank re-underwrites you as if it were a brand new application. That means today’s qualifying rules, including the federal stress test, which requires you to prove you could handle payments at a rate higher than your contract rate. If your income changed, you took on a car loan, or the new home is more expensive, you might not qualify for the full amount even though you’ve been paying the same mortgage for years. A buyer told me last year she assumed porting was automatic because she’d never missed a payment. The lender still ran her through the full process. If you want to understand what lenders look at, our guide to mortgage pre-approval in Vancouver walks through it.

Buying up usually means a blended rate

If the new home costs more, you’ll need to borrow more than your current balance. The lender doesn’t give you the extra money at your old rate. Instead they “blend” — they combine your existing rate on the old balance with today’s rate on the new money, and you end up with one weighted average rate. The bigger the top-up and the further today’s rates sit from your contract rate, the more the blend pulls your overall rate up or down. Some lenders also offer “blend and extend,” which resets you to a fresh full term at a blended rate. Ask exactly which version your lender uses, because it changes your payment and your maturity date.

Timing windows are strict

Almost no one’s sale and purchase close on the same day. Lenders give you a window to bridge that gap — commonly somewhere between 30 and 120 days, depending on the institution. If you sell in March and don’t buy until August, you may blow past the window and lose the port entirely, which can trigger the very penalty you were trying to avoid. Confirm your lender’s exact number in days before you list, not after.

How break penalties are calculated

If you don’t port — or can’t — you break the mortgage and pay a penalty. How that penalty is calculated depends entirely on whether your rate is fixed or variable, and the difference can be enormous.

Variable-rate mortgages: three months’ interest

If you’re on a variable rate, the penalty is almost always three months’ interest on your outstanding balance. It’s straightforward to estimate. Take your balance, apply roughly a quarter of your annual interest, and that’s your ballpark. On a typical Vancouver balance this often lands in the low thousands. Predictable, and usually the cheaper of the two penalty types.

Fixed-rate mortgages: the greater of two numbers

Fixed-rate penalties are where people get hurt. The penalty is the greater of:

1. Three months’ interest, or
2. The interest rate differential, known as the IRD.

The IRD is the lender’s way of recovering the interest they expected to earn over the rest of your term. In rough terms, they compare your contract rate to what they could charge a new borrower today for a term matching the time you have left, then multiply that gap by your balance and the years remaining. When today’s rates are lower than the rate you signed at, that gap is positive and the IRD can be large. When rates have risen since you signed, the IRD shrinks or disappears and you usually just pay three months’ interest.

Two things make fixed IRD penalties unpredictable. First, big banks often calculate IRD against their posted rates rather than the discounted rate you actually pay, which inflates the number. Second, the math is sensitive to how much term you have left — break it with three years remaining and the penalty is far bigger than breaking it with six months to go. The federal government’s mortgage prepayment penalty information through the Financial Consumer Agency of Canada explains the disclosure your lender must provide.

The only reliable way to know your fixed penalty is to call your lender and ask for the exact figure in writing. Don’t estimate an IRD yourself — the inputs vary too much between institutions.

When porting saves money and when breaking is cheaper

Here’s the part most articles skip. Porting is not automatically the smart move, and neither is breaking. It depends on where rates sit relative to your contract.

Porting tends to win when your contract rate is lower than today’s rates. You signed at a good rate, rates have since climbed, and carrying that old rate forward is worth protecting. You avoid the penalty and you keep cheap money. With the Bank of Canada policy rate sitting at 2.25% through mid-2026, plenty of homeowners who locked in during the higher-rate stretch are now in this position in reverse — worth checking your own contract rate against current offers.

Breaking tends to win when today’s rates are meaningfully lower than your contract rate. Yes, you pay a penalty, but if you refinance into a much lower rate for a long term, the interest you save can more than cover it. This is exactly the situation where a fixed IRD penalty is largest — and ironically, sometimes still worth paying, because the rate savings over the remaining years outweigh the one-time hit.

The honest answer is you have to run both numbers. A good mortgage broker will model porting (with the blended rate) against breaking (penalty plus a new lower rate) over the same time horizon and show you the total cost of each. Don’t let anyone tell you one is always better. I’ve seen it go both ways in the same month for two different clients.

How to plan a move around your mortgage

The clients who handle this well do the same three things, in this order, before they list.

First, dig out your mortgage commitment and find two facts: is the mortgage portable, and how many days is the porting window. Some products — especially certain no-frills or “rate special” mortgages — are not portable at all, and you only find out by reading the fine print or asking directly.

Second, call your lender and request your exact break penalty in writing, dated. It changes as rates move, so a number from three months ago is stale. Get a current one.

Third, take both figures to a mortgage broker and ask them to compare porting versus breaking over the same term. Do this before you make an offer, not after — once you’re firm on a purchase, your negotiating room disappears and you’re stuck with whatever the timing forces.

If you’re early in the planning and not sure how much you can carry on the new place, start with our Vancouver mortgage pre-approval guide, and when you’re closer to closing, the closing costs calculator will help you see the full cash-to-close picture including any penalty.

Key Takeaways

• Porting moves your existing rate and balance to a new home with no penalty, but you must re-qualify under current rules — including the stress test — and meet your lender’s timing window.
• Buying a more expensive home usually means a blended rate: your old rate on the old balance, today’s rate on the new money, combined into one weighted rate.
• Variable-rate break penalties are almost always three months’ interest — small and predictable.
• Fixed-rate break penalties are the greater of three months’ interest or the interest rate differential (IRD), which can be large when rates have fallen since you signed.
• Porting wins when your rate beats today’s market; breaking can win when today’s rates are far lower, even after the penalty.
• Get your exact penalty in writing and compare both options with a broker before you list or make an offer.

Frequently Asked Questions

Can I port my mortgage to a new home in BC?

Most lenders allow porting if your mortgage is portable and you still qualify under current rules, but you must re-qualify at today’s stress-tested rates and meet the lender’s timing window between the sale and the purchase. Check your mortgage agreement, because some products are not portable at all.

How is a fixed-rate mortgage break penalty calculated?

On a fixed-rate mortgage the penalty is usually the greater of three months’ interest or the interest rate differential (IRD). IRD compares your contract rate to the lender’s current rate for the remaining term, so larger penalties happen when rates have fallen since you signed.

What is the penalty for breaking a variable-rate mortgage?

Most variable-rate mortgages charge a penalty equal to three months’ interest on your outstanding balance. This is usually much smaller and easier to predict than a fixed-rate IRD penalty.

Is porting always cheaper than breaking my mortgage?

No. Porting avoids a penalty but locks you into your old rate, which may be higher than today’s rates. If current rates are well below your contract rate, breaking and refinancing can sometimes save more over the term even after the penalty. Run both numbers before deciding.

How much time do I get to port a mortgage between selling and buying?

Porting windows vary by lender, commonly ranging from about 30 to 120 days between the sale of your old home and the purchase of the new one. If the gap is longer than your lender allows, the port can fail and you may face a penalty, so confirm the exact window early.

Sources

• Financial Consumer Agency of Canada — mortgages and prepayment penalties
• Bank of Canada — policy interest rate
• Canada Mortgage and Housing Corporation (CMHC)
• BC Financial Services Authority — mortgage broker regulation

Work with Rain City Properties

A move-up purchase or a downsizing sale almost always involves an existing mortgage, and the difference between handling it well and badly can be thousands of dollars. I’m glad to look at your situation early, point you to a broker who’ll model both options honestly, and time the sale and purchase so your porting window actually works. The earlier we start, the more room you have to make the smart choice instead of the forced one.

Contact Greyden Douglas directly at (604) 218-2289 or book a call to discuss your Vancouver real estate goals.