Breaking a Fixed Mortgage Early: Penalties, Porting and Blend-and-Extend

by Alex Dunbar

Aerial view of a Walnut Grove arterial road with condo buildings and family homes in Langley

You're 2 years into a 5-year fixed mortgage, and life changed. Maybe you need more space, maybe you're moving for work, maybe rates moved and you're wondering if you should jump. Here's the thing nobody tells you when you sign: the cost of getting out of that fixed term can be thousands of dollars, and the number depends on a formula most people never see until they ask.

I'd rather you see that number now than find out the week you list your house. I've done a few videos on mortgage renewal on my YouTube channel, but renewal doesn't answer the bigger question: what if you can't wait until renewal? That's what this post is for. My post on Canada's mortgage renewal crunch covers the renewal side.

The Short Version

When you break a closed fixed-rate mortgage, your penalty is usually the higher of 3 months' interest or the interest rate differential (IRD). The IRD is the one that hurts, and it's often much bigger than you'd expect. Before you pay it, ask your lender about 2 ways around it: porting your mortgage to a new home, or a blend-and-extend. Both can cut or remove the penalty, but neither is free and neither fits everyone.

When You Actually Pay a Prepayment Penalty

According to the Financial Consumer Agency of Canada (FCAC), a penalty can apply if you pay more than your allowed extra amount, break your contract, switch to another lender before your term ends or pay off the whole mortgage early, and that includes selling your home. Lenders sometimes call it a "prepayment charge" or a "breakage cost." Same thing.

An open mortgage lets you prepay without a penalty. Most people in a fixed term are in a closed mortgage, so assume the penalty applies to you until your lender tells you otherwise in writing.

The trigger you're most likely to miss is the sale. You might think selling just pays off the mortgage and you're done, but mid-term on a closed fixed rate, selling is breaking the contract.

3 Months' Interest vs the Interest Rate Differential

FCAC says the penalty on a fixed-rate mortgage is usually the higher of 2 numbers.

The first is 3 months' interest on what you still owe. It's simple, and on its own it's usually the smaller of the two.

The second is the IRD. FCAC explains that your lender works out the total interest left on your current term at 2 different rates, and the gap between those 2 totals is the IRD. In plain terms, the lender is charging you for the interest it loses by re-lending your money at today's lower rate for the rest of your term.

FCAC also notes that lenders usually use the IRD when your rate is above the current rate and you signed less than 5 years ago. So the IRD tends to bite hardest when rates have dropped since you signed, which is exactly when you'd most want to break and refinance.

FCAC's Own Illustrative Example

FCAC uses round, illustrative numbers to show the difference. Picture a $200,000 balance at 6%, with 36 months left in the term, and a current posted rate of 4%. On those numbers, 3 months' interest works out to about $3,000, and the IRD comes to about $12,000. Since the penalty is the higher of the two, you'd pay $12,000.

Those aren't today's rates and they aren't your mortgage. The point is the gap: the IRD in that example is 4 times the 3-month figure.

Why Posted vs Discounted Rates Change Your IRD

This is the part that catches people off guard, and it's why 2 neighbours with similar mortgages can get very different penalty quotes.

FCAC explains that lenders advertise "posted" rates, and the rate you actually signed for may be lower. That lower rate is called a discounted rate. When a lender calculates the IRD, the first rate it uses can be either the posted rate when you signed or your discounted contract rate. The second rate can be either the current posted rate for a similar term or that current posted rate minus the discount you originally got.

Here's why that matters, using made-up round numbers to show the method only. Say you signed at a discounted 5%, and the lender compares that against a current posted rate of 4% minus your original 1-point discount, so 3%. Your rate gap is 2 points instead of 1, and the IRD roughly doubles. The bigger the discount you got up front, the more this method can push your penalty up.

You can't change the method after you sign, but you can find out which one your lender uses before you make a move.

What Your Lender Has to Tell You

You don't have to guess. FCAC's Code of Conduct on mortgage prepayment information says federally regulated lenders give you prepayment information every year, including how the charge is calculated. If you're prepaying and the IRD is used, the lender has to tell you the balance owed, your annual interest rate, the comparison rate used and the remaining term used in the calculation. You can also ask for a written statement of your prepayment charge, accurate as of the date it's produced.

My pick: get that written statement before you sign a listing agreement or write an offer on your next place. A phone estimate is a start. A written number is what you plan around.

Tools & Resources

Run your own numbers before you call your lender.

Mortgage Calculator Refinance ROI Calculator Qualification Calculator Neighbourhood Quiz

Porting: Taking Your Mortgage With You

Row of new three-storey townhomes on a sunny street in Langley City

If you're selling and buying, porting is the first thing to ask about. FCAC describes it simply: when you buy a new home, ask whether you can keep your existing rate and terms, which avoids breaking the contract.

Pros: you can avoid the penalty, and you keep a rate you might like more than today's.

Cons: not every mortgage is portable, and the rules vary by lender. If your next home costs more, you'll likely need extra financing on top, and the lender decides how that new money is priced. Timing matters too, because your sale and purchase have to line up closely enough to satisfy the lender's conditions.

Porting is a strong fit if you're moving within the Lower Mainland, say from a Surrey townhouse to a detached house in Langley, and you're buying around the same time you sell. It's a weaker fit if there's a long gap between selling and buying, or if you're moving to rent for a while. If you're juggling both sides, my guide to buying and selling at the same time walks through your options.

Blend-and-Extend: Resetting Without Breaking

Large stone detached home with a long paver driveway lit at dusk in Panorama Ridge, Surrey

FCAC lists blend-and-extend as an early renewal option. Your lender lets you extend your mortgage before your term ends, you don't pay a prepayment penalty and your old rate gets blended with the new term's rate. You may still pay administration fees, and FCAC says your lender must tell you how it calculates your new rate.

FCAC's simplified example: you're at 5.5% with 24 months left, and the lender's current 5-year rate is 4%. The math is 5.5 × 24 = 132, then 4 × 36 = 144 for the extra months, then (132 + 144) ÷ 60 = 4.6. You'd get 4.6% for the next 60 months. To see what a rate like that does to your payment, plug it into my mortgage calculator.

Pros: no penalty, a lower rate than you have now if rates have dropped, and you stay with a lender you already know.

Cons: you're locked in for a new full term, and the blended rate is usually higher than a fresh rate you might find elsewhere. It also does nothing if you need to sell and move lenders.

The Other Fees on Top of the Penalty

The penalty is the headline, but FCAC's page on breaking your mortgage lists more costs to check: administration fees, appraisal fees, reinvestment fees, a mortgage discharge fee and paying back any cash back you got when you took the mortgage out. Ask about each one so your total cost isn't a surprise.

FCAC also suggests 2 ways to shrink a penalty before you break: use your yearly prepayment privileges in full, since a lower balance means a lower penalty, and if you can, wait until the end of your term, when prepaying is penalty-free.

So Should You Break, Port or Blend?

Here's how I'd lean, with your situation deciding the call.

If you're selling and buying again soon, ask about porting first. It's the option most likely to save you the full penalty.

If you're staying put and rates have dropped, compare a blend-and-extend against the full cost of breaking and switching lenders, all fees included. FCAC's own advice is to make sure the savings from breaking still hold once every fee is counted.

If you're selling and not buying, or your mortgage isn't portable, the penalty is likely coming. Get the written statement, build it into your sale numbers and price your home knowing what you'll actually walk away with. My Refinance ROI Calculator can help you test whether breaking early pays for itself.

Who This Is Not For

If you're in an open mortgage, most of this doesn't apply, because you can prepay without a penalty. If you're on a variable-rate mortgage, your penalty may be calculated differently, so check your contract or ask your lender rather than leaning on the IRD examples here. And if your term ends in the next few months, you're probably better off waiting and shopping your renewal; my mortgage renewal videos on YouTube are the better place to start.

FAQ

How do I calculate my mortgage penalty in Canada?

Your lender calculates it, usually as the higher of 3 months' interest or the IRD. You can ask for a written statement of your prepayment charge, and if the IRD is used, your lender has to tell you the comparison rate and remaining term behind it.

Why is my interest rate differential so high?

Usually because rates have dropped since you signed, you have a lot of time left in your term or your lender compares your rate against a posted rate minus your original discount. Any of those widens the gap.

Can I avoid the penalty if I sell my house?

Sometimes. If your mortgage is portable and you're buying another home, porting can avoid breaking the contract. Ask your lender before you list.

Is blend-and-extend a good deal?

It can be if you're staying in your home and want a lower rate without paying a penalty. The trade-off is a new full term at a blended rate that may be higher than a fresh rate elsewhere.

Can I lower my mortgage penalty before I break?

FCAC suggests 2 ways: use your yearly prepayment privileges in full, since a lower balance means a lower penalty, and wait until the end of your term if you can, when prepaying is penalty-free.

What fees come with breaking a mortgage besides the penalty?

FCAC lists administration fees, appraisal fees, reinvestment fees, a mortgage discharge fee and paying back any cash back you got when you took the mortgage out.