Mortgage switch vs refinance: which is cheaper, and which one do you actually need?

Switch vs refinance: the short answer

A mortgage switch is almost always the cheaper transaction. You move the same mortgage — same balance, same remaining amortization, no new money — to a new lender at renewal, and many lenders will cover the basic legal and valuation costs to win the business. A refinance breaks and rewrites the mortgage, typically to increase the principal or change the amortization. It costs more and it is underwritten more strictly.

So the question is not really “which is cheaper.” The switch is cheaper. The question is whether a switch can do what you need. If you need money out of the property, or a longer amortization, or a different set of borrowers on title, a switch cannot do it — and no amount of shopping will change that.

Here is the awkward part. “Transfer”, “switch”, “refinance” and “renewal” are used loosely in conversation, in marketing and sometimes by lender staff. The four words describe four different transactions with different costs and different qualifying rules, and knowing which one you are in is worth real money.

The qualifying difference is bigger than the cost difference

This is the part people underestimate. Since 21 November 2024, OSFI has stated that it does not expect lenders to apply the minimum qualifying rate to uninsured straight switches at renewal. Insured borrowers have been exempt at renewal since January 2024, and in December 2024 the federal government confirmed the exemption extends to insurable mortgages that originated at a federally regulated financial institution.

A refinance has no such exemption. It is stress-tested at the minimum qualifying rate every single time. For a borrower whose ratios are tight, that is not a cost difference — it is the difference between an approval and a decline.

Which produces a specific and common trap. Someone decides to switch lenders and, while they are at it, adds $15,000 to the balance for a kitchen, or stretches the amortization back out to lower the payment. Either change ends the straight switch. The file is now a refinance, the minimum qualifying rate applies, and a transaction that would have sailed through is suddenly in question. Our Ontario stress test guide sets out all four conditions that cancel the exemption.

One caveat I will not let you skip: the exemption removes a calculation, not an underwriting process. Income verification, credit review and property assessment all still happen, and the new lender's own ratio limits still apply.

What each one actually costs

A switch at maturity is the cheapest meaningful change you can make to a mortgage. There is no prepayment penalty, because the term has ended. Discharge and registration costs exist, and many lenders will absorb the basic legal and valuation expense to acquire the business — though this is a lender-by-lender offer, not an entitlement, and it is usually capped. If your mortgage is registered as a collateral charge, the picture changes; our collateral charge guide explains why.A refinance mid-term starts with a prepayment penalty: usually the higher of three months' interest or the interest rate differential. That can be a substantial figure, and bank and monoline methods of computing the IRD can differ by thousands on identical facts. Work it out before you plan anything else — the penalty guide walks through FCAC's method. Then add full legal work, a likely appraisal, discharge and registration, and any cashback clawback.A refinance at maturity is the underrated middle path. You avoid the penalty entirely because the term has ended, and you still get the new money and the restructured amortization. If your need is not urgent and your maturity date is within sight, waiting is frequently the single most profitable decision available to you. Nobody at your bank is incentivised to point that out.

Where a broker changes the outcome

I compare more than thirty Canadian lenders on a single application, including monoline lenders that do not have branches and only reach borrowers through brokers. That matters more on a refinance than on a switch, because refinance appetite varies sharply between institutions — on amortization, on acceptable debt, on self-employed income, on property type. A decline at one lender on a refinance is routinely an approval at another with no change to the file.

I also spent years at CIBC and Scotiabank, on the side of the desk where these decisions get made. I know which questions a credit adjudicator is going to ask about a file before it goes in, which is usually the difference between a clean approval and a conditional one.

Last reviewed October 2026. The definitions, the straight-switch exemption and the stress test treatment described here are current as at this review, drawing on OSFI guidance and the federal confirmation of December 2024. OSFI reviews the qualifying rate buffer and floor at least annually. Lender-specific items — loan-to-value ceilings, who pays switch costs, amortization limits — vary by lender and change without notice.