BC Mortgage Portability Guide for Realtors: Porting, Blending & Bridge Financing
Thousands of BC homeowners locked in mortgage rates of 1.5%–3% during 2020–2022. In 2025–2026, many of these owners want to move — but breaking their mortgage would cost tens of thousands in penalties and force them into today's higher rates. Mortgage portability lets them take their rate with them. As a realtor, understanding how porting works, the simultaneous closing requirement, and bridge financing keeps deals together.
Key Takeaway for Realtors
Mortgage portability allows a seller to transfer their existing rate and remaining term to a new property — but only if both transactions close within the lender's portability window (typically 30–90 days). The borrower must re-qualify at current stress test rates. If the new property costs more, a blend-and-extend combines the old rate with new money at today's rate. Bridge financing covers the gap when the new home closes before the old one. Coordinate both completion dates before your client commits.
Why Mortgage Portability Matters in 2026
The 2020–2022 period saw the lowest mortgage rates in Canadian history. Five-year fixed rates dipped below 2% at some points, and many BC homeowners locked in 5-year terms at 1.7%–2.9%. These mortgages mature between 2025 and 2027 — and homeowners facing renewal are confronting rates of 4.5%–5.5%.
For homeowners who want to move before their mortgage matures, breaking the mortgage triggers a prepayment penalty — typically the greater of 3 months' interest or the Interest Rate Differential (IRD). On a $700,000 mortgage with a 2% rate in a 5% rate environment, the IRD penalty can exceed $40,000–$60,000. That is a powerful reason to keep the mortgage intact.
IRD Penalty Example (Why Portability Matters)
$700,000
Remaining mortgage balance
$42,000
Estimated IRD penalty (break at 2% rate in 5% environment, 2 yrs remaining)
$0
Penalty if mortgage is successfully ported — savings stay with the homeowner
As a realtor, understanding portability means you can:
- →Help sellers understand their true cost of moving (breaking mortgage vs. porting)
- →Set completion dates that work within the lender's portability window
- →Advise buyers when a motivated seller's need to port creates timing constraints
- →Identify when bridge financing is needed and approximately what it will cost
- →Know when to refer clients to their mortgage broker before accepting an offer
How Mortgage Portability Works: Step by Step
Seller Lists — Notifies Lender of Intention to Port
When a homeowner decides to sell and port their mortgage, they (or their mortgage broker) notify their lender of the intention to port. The lender confirms whether the mortgage is portable and provides the portability window — usually 30 to 90 days from the sale completion date.
Buyer Found — Both Completion Dates Aligned
The sale completion date is set. The seller must now find and firm up a purchase of a new property with a completion date within the lender's portability window. Realtors must coordinate both completion dates carefully — if the purchase closes outside the window, portability is lost.
Re-Qualification Under Stress Test
The lender re-qualifies the borrower for the new property. Even though the rate is being ported, the borrower must still demonstrate they can service the debt at the stress test rate (contract rate + 2%, or 5.25%, whichever is higher). If the new property is more expensive, the additional funds are also stress-tested.
New Property Approved by Lender
The lender must approve the new property as security for the mortgage. Condos, strata units with rental restrictions, mobile/manufactured homes, and properties with title issues may not be approved. The lender also orders a new appraisal of the purchase property.
Simultaneous Closing
Both transactions complete within the portability window. The existing mortgage is discharged from the old title and re-registered on the new title. Net equity from the sale (after paying out the old mortgage balance) is applied as the down payment on the new property.
Portability Windows by Major Canadian Lender
Portability windows vary significantly by lender. Realtors working with sellers who plan to port should confirm the window early — before setting completion dates.
| Lender | Portability Window | Notes |
|---|---|---|
| RBC Royal Bank | Up to 120 days | One of the more flexible windows; sale and purchase must both be firm |
| TD Canada Trust | Up to 90 days | Fixed-rate mortgage must be portable at time of origination |
| BMO Bank of Montreal | Up to 90 days | Port and increase available; new appraisal required |
| Scotiabank | Up to 90 days | Re-qualification required; STEP product ports differently |
| CIBC | Up to 90 days | Port available for most fixed-rate products |
| National Bank | Up to 90 days | Blend-and-extend available on port-and-increase |
| Meridian Credit Union | Varies (30–120 days) | Credit union portability windows vary significantly — always confirm |
| Monoline lenders (e.g., First National, MCAP) | 30–120 days depending on product | Often competitive portability terms — check mortgage agreement |
Always Refer to the Mortgage Agreement
The lender rates in this table are general approximations. Portability terms are set in the original mortgage agreement — clients should review their mortgage documentation or contact their lender/broker to confirm the exact window and conditions. Portability is not guaranteed even with lenders that generally offer it.
Blend-and-Extend: Porting When You're Moving Up
When a homeowner ports their mortgage to a more expensive property and needs to borrow additional funds, the lender creates a blended rate — combining the original rate on the ported balance with the current market rate on the new money.
Blend-and-Extend Example
$500,000 @ 2.5%
Ported balance (original rate — 3 years remaining on term)
$250,000 @ 5.2%
New money (current 3-year fixed rate for matching term)
$750,000 @ ~3.8%
Blended rate on total mortgage (weighted average of both)
Blended rate formula: ($500K × 2.5% + $250K × 5.2%) ÷ $750K = 3.73%
Versus breaking and renewing at 5.2% on $750,000 — savings: ~$10,900/yr in interest
What Realtors Should Know About Blend-and-Extend
- →The new money portion is priced at current market rate — not the original rate. Only the ported balance keeps the original rate.
- →The term for the blended mortgage typically matches the remaining term of the original mortgage — not a new 5-year term.
- →Some lenders offer 'blend-and-extend' where the term is extended (e.g., to a new 5-year term at the blended rate), avoiding the issue of a short remaining term.
- →The borrower must qualify for the combined $750,000 mortgage under the stress test — at the blended rate + 2% (or 5.25%, whichever is higher).
- →Not all lenders offer blend-and-extend — some require the borrower to break and renew, triggering an IRD penalty. The mortgage agreement specifies which options are available.
Bridge Financing: When Closings Don't Line Up
Even with careful planning, completion dates don't always align perfectly. When a buyer needs to complete on their new home purchase before their existing home sale closes, they need bridge financing to cover the down payment gap.
When Bridge Financing Is Needed
- →New home closes May 15; existing home closes June 1 — 17-day bridge needed
- →Seller accepted a delayed completion on their sale (buyer needed extra time)
- →New home deal firm but existing home had unexpected subject removal delay
- →Builder completion date for new home is earlier than expected sale completion
How Bridge Financing Works
- →Lender advances the equity from the old home (less mortgage payoff) as a short-term loan
- →Rate: typically Prime + 2%–3% (e.g., if Prime is 4.95%, bridge rate is ~6.95%–7.95%)
- →Repaid automatically when old home sale closes — no monthly payments during bridge
- →Requires a firm (unconditional) sale contract on the old property as security
- →Administration fee typically $200–$500 plus daily interest on bridge amount
Bridge Financing Cost Example
$300,000
Bridge amount (equity in old home after mortgage payoff)
30 days
Bridge duration
7.5%
Bridge rate (Prime + 2.55%)
~$1,850
Total bridge cost (30 days interest + $350 admin fee)
Bridge Financing Requires a Firm Sale
Lenders will not approve bridge financing unless the borrower has a firm (unconditional) sale contract on the old property. A conditional sale — where subjects have not been removed — does not qualify. This is why removing subjects on the old home before requesting bridge financing is critical. If your seller client removes subjects on their purchase before removing on their sale, they may find themselves unable to access bridge financing.
When Portability Fails: Scenarios and Solutions
| Portability Failure Scenario | Why It Fails | Realtor Advisory |
|---|---|---|
| Purchaser can't re-qualify under stress test | Income decreased, higher debt load, or new property is more expensive than qualifying ratio allows | Refer to mortgage broker before listing; explore less expensive property or larger down payment |
| New property not approved by lender | Strata with rental restrictions, rural property, leasehold, mobile home, or appraisal issues | Confirm lender approval before removing subjects; get lender to assess property type early |
| Completion dates too far apart | Old home closes in January; new home purchase closes in April — outside 90-day window | Negotiate completion dates before firms; or seller rents after closing to buy within window |
| Variable-rate mortgage not portable | Some variable-rate products explicitly exclude portability in mortgage agreement | Advise seller to review mortgage agreement early; prepayment penalty may be only 3 months' interest (lower for variables) |
| Sale falls through after purchase committed | Seller's buyer backs out; now seller has two properties and must carry both | Never remove subjects on purchase before subjects removed on sale; sequence matters |
Advisory Scripts for Mortgage Portability
Seller Worried About Breaking Their Low-Rate Mortgage
“"I understand — your 2.1% rate is a real asset right now. The good news is your lender likely offers portability, which means we can take that rate with you to your new home. The key is making sure the completion dates on both properties fall within your lender's portability window — usually 30 to 90 days. I'd recommend talking to your mortgage broker or lender this week so we know exactly what the window is before we set completion dates in any deal."”
Buyer Asks Why Seller Needs a Specific Completion Date
“"The seller is porting their mortgage from their current home — they have a very low rate they want to keep. That means both closings need to happen within about 90 days of each other. The completion date we're looking at works perfectly for that — it gives them about 60 days to find their next place and close on it. It's not unusual in the current market, and it shouldn't change anything for you as a buyer."”
Seller Needs Bridge Financing (New Home Closes First)
“"Here's the situation: your new home closes June 1st and your old home closes June 20th. You'll need about $280,000 bridged for 19 days to cover your down payment. Bridge financing from your lender for that amount at current rates will cost around $1,100–$1,400 total — it's essentially a short-term loan repaid the moment your old home closes. Your mortgage broker can arrange this — it's standard and your lender should be able to confirm it quickly once your sale is firm."”
Client Asks If They Should Break Their Mortgage Instead
“"Let's run the numbers before you decide. Your prepayment penalty estimate is around $38,000 — that's your IRD. If you port, you save that $38,000 but your blended rate on the new property will be about 3.9% rather than your current 2.4%. Over the remaining 3 years, the rate difference costs you roughly $9,000 more in interest — so the port still saves you about $29,000 net. Breaking is almost never cheaper in your situation, but your mortgage broker should model it precisely."”
Realtor Checklist: Clients Porting a Mortgage
Ask early: 'Do you have a mortgage you're hoping to port?'
Confirm the lender's portability window (30–120 days depending on lender)
Ensure both completion dates fall within the portability window
Advise client to contact their mortgage broker or lender before accepting any offer
Sequence: remove subjects on sale BEFORE removing subjects on purchase
For bridge financing: confirm sale is firm before client removes subjects on purchase
Confirm new property type is acceptable to lender (no leasehold, rural, or strata restrictions)
Check that client can still re-qualify under current stress test rules
For blend-and-extend: confirm lender offers this product and understand blended rate
Document all completion date constraints in your buyer's offer to avoid future disputes
If in doubt — refer to a mortgage broker BEFORE writing the offer
Keep notes: if a port fails, having documented your advice protects you from liability
Frequently Asked Questions
Can a BC homeowner port their mortgage to a new property?▼
Yes — most Canadian fixed-rate mortgages are portable, meaning the borrower can transfer (port) their existing mortgage rate and terms to a new property when they sell and buy simultaneously. However, portability is not guaranteed: the borrower must re-qualify under current lending guidelines (including the stress test), the new property must be acceptable to the lender, and both the sale and purchase must typically close on the same day or within a specific window (often 30–90 days depending on the lender). Variable-rate mortgages are often portable but rules vary by lender.
What happens if the new home costs more than the old one — can you still port?▼
Yes — this is called a 'blend-and-extend' or 'port and increase.' The original mortgage balance is ported at the original rate, and the additional funds needed are borrowed at the current market rate. The lender blends these two rates into a single new rate for the combined amount. For example: $400,000 ported at 2.5% + $200,000 new money at 5.5% = blended rate of approximately 3.5% on $600,000. The borrower must still qualify for the total combined mortgage under current stress test rules.
What is the simultaneous closing requirement for mortgage portability?▼
Most lenders require that the sale of the old property and the purchase of the new property complete within a specific window — often the same day or within 30–90 days. If the gap is too long, the lender treats it as two separate transactions and the old mortgage must be discharged (potentially triggering a prepayment penalty). This is why completion dates on both contracts need to be carefully coordinated. Realtors representing porting clients should confirm the lender's specific portability window before setting completion dates.
What is bridge financing and when is it needed during a port?▼
Bridge financing is a short-term loan that covers the gap when a buyer needs to complete on their new home purchase before their old home sale closes. For example, if the new home closes May 15 but the old home closes May 30, the buyer needs 15 days of bridge financing to cover the down payment from the equity in their old home. Bridge loans typically carry prime + 2–3% interest for the duration of the bridge period. They are usually offered by the same lender holding the new mortgage, and require a firm sale contract on the old property as security.
Can a homeowner port their mortgage if they are buying and not selling — like buying a second property?▼
No — mortgage portability requires selling the property that the current mortgage is registered against. You cannot port a mortgage while keeping the original property. If a homeowner wants to buy a second property while keeping their first, they must obtain a new mortgage (or HELOC) on the new property and their existing mortgage remains on the original property. Porting is specifically for the scenario where the old home is sold and the proceeds and mortgage are transferred to a new home.
Track mortgage portability and completion date constraints in your CRM
Magnate360 lets you note financing conditions and completion date requirements on every listing and buyer file — so nothing falls through the cracks.