Mortgage Penalties Explained: How to Avoid Paying Thousands

Life changes — you sell, you refinance, or rates drop and you want out of your term. But breaking a closed mortgage early in Canada usually comes with a prepayment penalty, and for fixed-rate borrowers it can be far larger than expected. This guide explains how mortgage penalties are calculated, why they vary so much, and how to avoid paying thousands.

Key takeaways

• Breaking a closed mortgage before the term ends usually triggers a prepayment penalty.
• Fixed-rate penalties are typically the greater of three months' interest or the Interest Rate Differential (IRD).
• Variable-rate penalties are usually just three months' interest — often much smaller.
• Open mortgages and prepayment privileges let you pay down without penalty.
• HOMEH gives eligible buyers the industry's highest Cashback Rebate — money that can far outweigh a penalty. Sellers list for 1%, or free when they also buy with HOMEH within 6 months, or $395 + HST with a Mere Posting.

What is a mortgage penalty?

A mortgage penalty — formally a prepayment charge — is a fee your lender charges when you pay off or break a closed mortgage before the end of its term. You might trigger one by selling without porting your mortgage, refinancing to a new lender, or paying off the balance entirely.

The penalty exists because your lender priced your loan expecting to earn interest for the full term. Breaking early cuts that short, so the charge compensates for the lost interest. For the bigger picture, see how mortgages work in Canada; and if you're choosing your mortgage now, our guide to open vs closed mortgages explains who's exposed to penalties and who isn't.

The two ways penalties are calculated

Canadian lenders generally use one of two methods. Which one applies depends mostly on whether your rate is fixed or variable.

For variable mortgages, the penalty is almost always a straightforward three months' interest on your balance. For fixed mortgages, the lender takes the greater of three months' interest or the Interest Rate Differential — and that's where the costly surprises happen.

Understanding the IRD

The Interest Rate Differential (IRD) is a calculation based on the difference between your original mortgage rate and the rate the lender could charge today for the time left on your term. In plain terms: if rates have fallen since you signed, your lender stands to earn less re-lending the money, so the IRD makes up that gap.

This is why fixed-rate penalties can be so large. When rates have dropped meaningfully and you have a long time left in your term, the IRD can run to many thousands of dollars — far more than three months' interest. The exact figure depends on your lender's specific formula, so always ask for a written quote before acting.

Why IRD can shock fixed-rate borrowers

Three months' interest is easy to estimate. The IRD is not — it swings with how much rates have moved and how long is left in your term. Two borrowers with the same balance can face very different IRD penalties.

How to reduce or avoid a penalty

You have more options than you might think. A few can eliminate the penalty entirely or shrink it significantly:

• Use your prepayment privileges first. Most closed mortgages let you pay down a set amount each year penalty-free — apply that before calculating the charge on the rest.
• Port your mortgage. Carrying your existing mortgage to a new home can avoid breaking it; see how to port your mortgage.
• Time it around renewal. There's no penalty for changing lenders at the end of your term — read our mortgage renewal guide.
• Choose variable or open if you expect to break early — their penalties are smaller or non-existent.
• Always get the exact figure in writing from your lender before you commit.

When breaking your mortgage still pays off

A penalty isn't always a reason to stay put. If breaking your mortgage lets you lock in a much lower rate, the long-term interest savings can exceed the penalty. The only way to know is to compare the penalty against your projected savings.

Run both sides of the math before deciding — our guide on whether you should refinance walks through it, and the HOMEH refinance calculator helps you compare the numbers for your situation.

Cashback that can dwarf a penalty

Worried about a penalty when you buy or sell? HOMEH gives eligible buyers the industry's highest Cashback Rebate — often far more than any prepayment charge. Sellers list for 1%, or free when they also buy with HOMEH within 6 months, or $395 + HST with a Mere Posting. Estimate yours with the HOMEH cashback calculator.