Selling Before Your Mortgage Term Ends in BC: The Penalty, Porting and Blend-and-Extend
Most move-up sellers in the Tri-Cities are partway through a mortgage term. Before you list, you need to know what leaving that mortgage will cost, and whether taking it with you or blending it is cheaper. Here is how each option works, with one example homeowner run through all three.
Quick Answer
Selling mid-term usually means one of three things: you pay a prepayment penalty, you port your existing mortgage to the next home, or you blend and extend. Which costs least depends on your rate compared with today's rates, how much time is left on your term, and whether your next mortgage is bigger than your current one. On a closed mortgage the penalty is usually the higher of three months' interest or the interest rate differential (IRD). Get your lender's written penalty figure before you list, not after you accept an offer.
Why this matters more for move-up sellers
Most move-up sellers took out or renewed their mortgage in the last few years. If you sell before the term ends, the lender doesn't simply hand over the discharge. The cost of leaving comes out of your sale proceeds at completion, and that changes the down payment you can put on the next home.
That is why this belongs in the plan before you list. Step 1 of the Move-Up Protocol is mapping your real equity, and the mortgage exit cost is one of the few line items that can move that number by five figures.
The example homeowner
To keep the three options comparable, here is one illustrative Tri-Cities homeowner. These numbers are invented to show how the math works; they are not anyone's real mortgage and not a lender quote.
| Item | Example |
|---|---|
| Mortgage balance today | $520,000 |
| Current rate | 5.29% fixed (5-year term) |
| Time left on the term | 30 months |
| Lender's current rate for a similar remaining term | 3.89% |
| Mortgage needed on the next home | $800,000 |
Option 1: Pay the prepayment penalty
If you have a closed mortgage and break it before the term ends, you normally pay a prepayment penalty. The Financial Consumer Agency of Canada (FCAC) says this fee "can cost thousands of dollars." Open mortgages carry no prepayment penalty.
According to the FCAC, the penalty is typically the higher of two numbers:
- Three months' interest on the remaining balance.
- The interest rate differential (IRD): roughly, the interest the lender loses because it has to re-lend your money at today's lower rate for the rest of your term.
Lenders typically use the IRD when your mortgage rate is higher than the current rate and you signed your contract less than five years ago. Your contract sets the exact method.
The example homeowner's penalty:
| Method | Calculation | Result |
|---|---|---|
| Three months' interest | $520,000 × 5.29% ÷ 4 | $6,877 |
| Interest rate differential (simplified) | $520,000 × (5.29% − 3.89%) × 30 ÷ 12 | $18,200 |
| Penalty charged (the higher) | $18,200 plus any administration fee |
Two things can make the real IRD different from this simple version. First, the comparison rate: the FCAC explains that some lenders compare against their posted rate minus the discount you originally received, and that choice can make the penalty larger. Second, the exact months remaining and your current balance on the payout date. I go through why the method varies between lenders in why I almost always recommend a mortgage broker.
When your rate is at or below today's rates, the IRD is small or zero, so three months' interest is what you typically pay. A second illustration: a $450,000 balance at 3.95% gives $450,000 × 3.95% ÷ 4 = about $4,444.
Ways to shrink the penalty (all listed by the FCAC):
- Use your annual prepayment privileges, so the penalty is calculated on a smaller balance.
- Make a lump-sum prepayment before you break the mortgage. Some lenders restrict prepayments close to the break date, so ask early.
- If the penalty is large and your timeline allows, wait until the term ends.
- Port the mortgage instead of breaking it (Option 2).
Option 2: Port the mortgage
Porting means taking your existing interest rate, terms and conditions with you to your new home, as the FCAC puts it, so you don't break the contract and sign a new one. The FCAC doesn't set a deadline for buying the next home. Lenders set their own porting window and conditions, so ask for them in writing.
Most move-ups need a bigger mortgage. When that happens, lenders commonly keep your ported rate on the existing balance and price the extra money at a current rate, which produces a blended rate on the larger total. Methods vary, so ask your lender or broker exactly how they do it.
The example homeowner ports:
| Piece | Amount | Rate |
|---|---|---|
| Ported balance | $520,000 | 5.29% |
| New money for the bigger home | $280,000 | 3.89% |
| Simple blended rate on $800,000 | ($520,000 × 5.29% + $280,000 × 3.89%) ÷ $800,000 | 4.80% |
No penalty is paid. But compare it with breaking the mortgage and borrowing the full $800,000 at 3.89%. Keeping 5.29% on $520,000 for the remaining 30 months costs about $520,000 × 1.40% × 2.5 = $18,200 in extra interest, which is the same as the IRD in Option 1. That is not a coincidence: the IRD is essentially the lender charging you up front for the interest it would lose.
So in this example, porting and paying the penalty land in roughly the same place. What tips the decision is everything the simple math leaves out:
- Your lender's real IRD method. If it uses posted rates and produces a penalty well above the interest you'd actually save, porting usually wins.
- Fees on porting, on a new mortgage, and the discharge fee.
- The term you end up locked into on the blended amount.
- Whether you want a different lender or product. Porting keeps you with the lender you have.
Porting matters most when your rate is better than what you could get today. Then you keep the cheaper rate and avoid a penalty at the same time. The Bank of Canada raised its overnight rate target by 25 basis points to 2.50% on October 28, 2026, and the major banks' prime rate moves to 4.70% on October 29, which moves variable and prime-based borrowing. Fixed rates are priced separately. I'm not predicting where rates go next.
One catch: you still have to qualify for the new mortgage amount. See the stress test guide for what that means for a move-up.
Option 3: Blend and extend
The FCAC describes blend-and-extend as extending your mortgage before the term ends. You don't pay a prepayment penalty, though you may pay administrative fees. The lender blends your old interest rate with the new term's rate, and it must tell you how it calculates the result.
The example homeowner blends and extends into a new 60-month term offered at 3.89%:
| Part of the new 60-month term | Months | Rate |
|---|---|---|
| Months left on the old term | 30 | 5.29% |
| Months added | 30 | 3.89% |
| Blended rate | (5.29 × 30 + 3.89 × 30) ÷ 60 | 4.59% for 60 months |
Blend-and-extend is mainly a tool for refinancing or renewing early on the same property. For a move-up seller it is most useful as a comparison when the penalty looks large: ask what the blended rate would be and how long it locks you in. When you are buying a bigger home, lenders often combine porting with a blend on the new money, which is the Option 2 math above.
The three options side by side
| Pay the penalty | Port | Blend and extend | |
|---|---|---|---|
| What happens | Mortgage is paid off and discharged at your sale | Your rate and terms move to the new home | Existing mortgage extended at a blended rate |
| Cost | Penalty comes out of sale proceeds | Typically fees; blended rate on any added funds | No prepayment penalty per FCAC; possible administrative fees |
| Example homeowner | $18,200 penalty, then 3.89% on $800,000 | No penalty; about 4.80% blended on $800,000 | About 4.59% for a new 60-month term |
| Works best when | Penalty is small, or you want a new lender or product | Your rate is better than today's offers, or the IRD method is harsh | You keep the same mortgage and want to adjust the term |
| Watch for | The penalty shrinking your down payment | The porting window; qualifying for the bigger amount | A longer lock-in; the lender's blending method |
How to build it into your move-up plan
- Ask your lender for a written penalty estimate before you list, for a sale date about 60 to 90 days out.
- Ask three porting questions: Is my mortgage portable? How long is the porting window? How is new money priced and blended?
- Subtract the exit cost from your net proceeds. Use the seller net proceeds calculator and the net-proceeds breakdown to see the full picture.
- Talk to a mortgage broker early. A broker can compare the penalty, porting and blending numbers across lenders before you commit. Here's why I almost always recommend one.
- Line up your dates. The discharge, your sale completion and your purchase completion all have to fit together, and a porting window adds a deadline. See Sell First or Buy First? and, if there will be a gap, bridge financing.
Frequently asked questions
Can I sell my house in BC if I'm in the middle of a mortgage term?
Yes. A closed mortgage can be paid off and discharged when you sell, usually with a prepayment penalty. You may also be able to port the mortgage to your next home or blend and extend instead. Your contract sets the details, so ask your lender for a written payout figure before you list.
How is the prepayment penalty calculated?
According to the Financial Consumer Agency of Canada, it is typically the higher of three months' interest on the remaining balance or the interest rate differential (IRD). Lenders typically use the IRD when your rate is higher than the current rate and you signed less than five years ago. In this article's example, a $520,000 balance at 5.29% with 30 months left and a 3.89% comparison rate gives three months' interest of $6,877 and a simplified IRD of $18,200, so the penalty would be $18,200 plus any fee.
Why can the IRD be so much bigger than three months' interest?
The IRD covers the whole remaining term, not three months. It grows with the gap between your rate and today's rate, the size of your balance and the months left. Some lenders also compare against posted rates minus your original discount, which can make it larger again.
Does an open mortgage have a penalty?
No. Open mortgages have no prepayment penalty, although they usually carry higher rates than closed mortgages.
What is the difference between porting and blend-and-extend?
Porting moves your existing rate, terms and conditions to a new property. Blend-and-extend keeps the same mortgage and combines your old rate with a new rate over a longer term. When a move-up needs a bigger mortgage, lenders often combine the two: the ported balance keeps its rate and the new money is priced at today's rate.
Can I port my mortgage if the new home costs more?
Often yes, but the extra amount is usually priced at a current rate, so you end up with a blended rate on the larger total, and you must qualify for that total. In the example here, porting $520,000 at 5.29% and adding $280,000 at 3.89% works out to about 4.80% on $800,000.
How long do I have to buy after I sell if I want to port?
It depends on your lender. The FCAC doesn't set a deadline, so ask your lender for the porting window and its conditions in writing before you list.
Is porting always cheaper than paying the penalty?
Not always. In the simple example in this article, the extra interest from keeping a higher rate roughly equals the IRD. Porting tends to win when your rate is below today's rates or when your lender's IRD method produces a penalty larger than the interest you would save. Fees, the term you lock into and whether you want a different lender also matter.
Does the penalty come out of my sale proceeds?
Typically yes. It is paid when the mortgage is discharged at completion, from your sale funds, which is why it reduces the money available for your next down payment.
Does a mortgage penalty affect bridge financing?
It can. Bridge lenders size a bridge from your firm sale price less your existing mortgage payout and selling costs, so a large penalty reduces the equity available to bridge.
Sources & Methodology
Penalty, porting and blend-and-extend descriptions come from the Financial Consumer Agency of Canada. Rate context comes from the Bank of Canada and bank announcements. All dollar examples are Craig Johnston's own illustrative arithmetic, checked by calculation, and are not lender quotes.
- Financial Consumer Agency of Canada — Breaking your mortgage contract. canada.ca/en/financial-consumer-agency/services/mortgages/break-mortgage-contract.html — prepayment penalties, open mortgages, blend-and-extend. Checked October 28, 2026.
- Financial Consumer Agency of Canada — Mortgage fees: Prepayment penalties. canada.ca/en/financial-consumer-agency/services/mortgages/reduce-prepayment-penalties.html — three months' interest vs. IRD, posted and discounted rates, porting, ways to reduce penalties. Checked October 28, 2026.
- Bank of Canada — Interest rate announcement, October 28, 2026. bankofcanada.ca/2026/10/fad-press-release-2026-10-28 — overnight rate target raised to 2.50%.
- Bank prime-rate announcements, October 28, 2026. BMO (newswire.ca) and CIBC announced prime of 4.70%, effective October 29, 2026.
- Craig Johnston, REALTOR® (BCFSA Licence #187645). 47+ year Tri-Cities resident, Top 1% Team at Greater Vancouver REALTORS®, 2023–2025, working with move-up sellers who are mid-term on their mortgages.
Methodology: the IRD shown is simplified (rate difference × balance × months remaining ÷ 12) and the blends are simple weighted averages. Lenders use their own rate tables and formulas. Last reviewed October 28, 2026. General information only; not mortgage, legal or tax advice.
Signed: Craig Johnston, REALTOR® (BCFSA Licence #187645) · Royal LePage Elite West · The Tri-Cities Move-Up Specialist
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