Key Takeaway

Mortgage portability lets you transfer your existing mortgage rate, term, and remaining balance to a new property when you move, without breaking your current mortgage contract. This feature can save you thousands in prepayment penalties and lets you keep a favourable interest rate if current rates have risen since you locked in. Not all mortgages are portable, and lenders impose timing restrictions, qualification requirements, and may charge fees even when portability is allowed.

What Is Mortgage Portability

Portability is a feature built into many Canadian mortgages (both fixed-rate and variable-rate) that allows you to transfer your existing mortgage to a new home without paying the full prepayment penalty for breaking your term early. According to the Financial Consumer Agency of Canada, portability provisions vary widely by lender and product, so the feature must be confirmed in your mortgage contract at the time of signing (FCAC, 2026).

When you port your mortgage, you move your current interest rate, remaining term length, and outstanding principal balance to the new property. If your new home costs more than your current mortgage balance, you can typically add a second mortgage segment at current rates (called porting and increasing, or “blend and extend”). If the new home costs less, you may need to pay a penalty on the amount you cannot port.

How Portability Works

To port a mortgage in Canada, you typically must sell your existing home and close on the new property within a narrow window, often 30 to 120 days depending on the lender. You must re-qualify for the mortgage under current lending rules, including the OSFI mortgage stress test, even though you are keeping the same rate. The Canada Mortgage and Housing Corporation notes that lenders treat portability as a new mortgage application for underwriting purposes, so your income, credit, and debt ratios must meet current standards (CMHC, 2026).

The process generally involves notifying your lender as soon as you decide to move, applying to port the mortgage before your current home sale closes, and coordinating closing dates so the gap between properties stays within the lender’s allowed window. If the timing falls outside that window, portability may be denied and you will pay the full prepayment penalty.

When Portability Makes Sense

Portability offers the most value when interest rates have risen since you locked in your original mortgage. For example, if you secured a five-year fixed rate at 2.5 per cent in 2022 and current rates are 5.0 per cent in 2026, porting that mortgage saves you 2.5 percentage points in interest on the ported balance. On a 400,000 dollar balance over the remaining term, that difference can amount to tens of thousands of dollars in savings.

Portability also avoids or reduces the prepayment penalty you would otherwise pay to break a closed mortgage mid-term. For fixed-rate mortgages, that penalty is typically the greater of three months’ interest or the interest rate differential (IRD), which can reach five figures on large balances when rates have fallen or when significant time remains on the term. As covered in foundational finance texts such as Principles of Finance, the time value of money makes locking in lower rates for longer periods financially advantageous in rising-rate environments.

Read also: How to Negotiate Your Mortgage Renewal Rate in Canada

Common Restrictions and Costs

Even when your mortgage contract includes portability, lenders impose limits. You must still qualify under current credit and income rules, and the new property must meet the lender’s appraisal and insurance requirements. If you are porting and increasing (borrowing more for a higher-priced home), the new portion is advanced at current market rates, and some lenders will blend the two rates over a new term rather than keeping the original rate and term intact on the ported portion.

Some lenders charge an administrative fee (typically 200 to 500 dollars) to process a port, and legal and appraisal costs for the new property still apply. If the timing window cannot be met or the new property does not qualify, portability is denied and the full prepayment penalty is triggered. According to Ratehub, fewer than half of borrowers who plan to port their mortgage ultimately complete the process due to timing, qualification, or property issues (Ratehub, 2026).

What to Do Next

If you are planning to move during your mortgage term, review your mortgage contract now to confirm whether portability is included and understand the lender’s specific conditions and timing requirements. Contact your lender or a licensed mortgage broker as soon as you decide to move to start the portability application and coordinate closing dates. Compare the cost of porting (including any blend-and-extend rate penalty on an increased amount) against the cost of breaking your mortgage and securing a new one at current rates to confirm portability is the better financial choice for your situation.

Financial Disclaimer: This article provides general educational information about mortgage portability in Canada and is not personalized financial, lending, legal, or tax advice. Mortgage products, portability terms, prepayment penalties, and qualification rules vary by lender, province, and individual circumstances. Interest rates and mortgage stress test requirements change frequently. Consult a licensed mortgage broker or your financial institution to confirm current terms, verify portability eligibility for your specific mortgage, and receive advice tailored to your personal situation before making any mortgage or real estate decisions.