Switching vs Refinancing a Mortgage in Canada

Switching vs refinancing a mortgage in Canada comes down to what you want to change. A switch moves your existing mortgage to a new lender on essentially the same terms and balance, usually at renewal, so you chase a better rate without touching the mortgage itself. A refinance replaces your mortgage with a new one — new rate, new term, new amortization, or new balance — which is how you pull out equity or restructure debt. Knowing which one you need keeps you from paying penalty charges you did not have to pay.

The core difference: same mortgage, new lender vs a new mortgage

A switch is a transfer of an existing mortgage from one lender to another. The balance, amortization schedule, payment frequency, and remaining term stay largely the same; only the lender, and often the rate, changes. A refinance is a brand-new mortgage that pays off and replaces the old one, so you can change nearly every variable — including how much you owe.

What a mortgage switch really involves

A switch — sometimes called a transfer — is the cheaper, simpler path when your only complaint is your rate. You are not asking for more money, so the lender's risk does not change much, and many lenders advertise low-fee or no-fee switches that cover part of the cost to win your business.

To keep costs low, time the switch to your renewal date. Breaking a closed mortgage mid-term can trigger a prepayment penalty, and on a fixed-rate mortgage the penalty is often the greater of three months' interest or the interest rate differential (IRD) — a figure that can be surprisingly large when rates have moved since you signed. Our guide to interest rate differential (IRD) walks through how that calculation works.

You still have to qualify with the new lender. That means income verification, a credit check, and passing the federal mortgage stress test, which uses the higher of your contract rate plus two percentage points or the published qualifying-rate floor. Confirm the current floor with OSFI or your lender. If your mortgage carries CMHC or other mortgage default insurance because your down payment was under 20%, your new lender must be approved to handle insured mortgages and the insurance usually stays with the loan.

Start with how to switch mortgage lenders in Canada for the paperwork sequence and timelines.

What a refinance really involves

Refinancing replaces your mortgage with a new one, so you can change far more than the rate. Common goals include lowering your payment by stretching the amortization, switching between fixed and variable, adding or removing a borrower, consolidating higher-interest debt, or pulling out equity for renovations or a down payment on another property.

Because a refinance pays out the old mortgage, you usually trigger a prepayment penalty unless you wait for renewal. A refinance also resets the qualification process from scratch. The new lender runs the GDS and TDS ratios to test whether your housing costs and total debts fit its limits, and applies the stress test again. If you take equity out, the loan-to-value ratio matters, and default insurance rules can apply when the loan-to-value is high.

Using a refinance to reach your equity is covered in detail in refinancing a mortgage in Canada, and you can test whether the math works with the Refinance Break-Even Calculator.

Costs and penalties: where the two paths diverge

Costs are the clearest dividing line. A switch near renewal is typically the least expensive way to change lenders: you may pay a discharge or assignment fee, and occasionally an appraisal, but many lenders waive or absorb these to attract the mortgage.

A refinance carries more line items:

• A prepayment penalty if you break the current term, which you can estimate with the Mortgage Penalty Calculator.
• Legal or notary fees to discharge the old charge and register the new one.
• A property appraisal, if the lender needs one to confirm value.
• Discharge and registration fees, which vary by province and lender.

Add it all up before you decide. If the refinance only shaves a small amount off your rate, the break-even point can be years away. If you are consolidating high-interest debt or need the equity, the math often favours refinancing.

Do you qualify? The rules apply to both

Neither option is a pass on qualification. In a lender's eyes, both a switch and a refinance are new mortgage contracts, so both run through income verification, a credit check, and the federal stress test introduced under OSFI Guideline B-20. As of the current year, the test uses the higher of your contract rate plus two percentage points or the published minimum qualifying rate; confirm the current floor with OSFI or your lender.

Lenders also look at GDS (gross debt service) and TDS (total debt service) ratios to decide how much mortgage you can carry. A refinance that increases your balance, extends your amortization, or folds in consumer debt will shift those ratios, so a deal that looks fine on paper may still need a stronger income picture. Read the Canadian mortgage stress test, explained for the full picture on how lenders apply it.

Which one fits your goal?

Match the tool to the job:

• Switch if your only goal is a lower rate, your balance and amortization are fine, and you are at or near renewal.
• Refinance if you need to access equity, consolidate debt, change the amortization, add or remove a borrower, or move between fixed and variable rates.
• Do nothing if the savings will not clear the switching costs before your next renewal.

A quick way to think about it: a switch changes who you pay; a refinance changes what you owe and how you pay it back.

A simple decision path

1. Write down why you want to change: rate only, or also cash, debt, or term structure.
2. Check your renewal date and your current mortgage contract for prepayment penalty terms.
3. Ask your current lender for its best renewal offer — that is your benchmark.
4. If the goal is rate-only, price a switch. If it is equity or restructuring, price a refinance.
5. Compare total costs, including penalty, legal, appraisal, and discharge fees, against the monthly savings.
6. Confirm qualification with the stress test before you commit.

Taking the time to price both paths before you sign usually beats accepting a renewal letter and moving on.