Quick answer
- A mortgage prepayment penalty in Canada is the fee a lender charges when you pay off, refinance, or switch a closed mortgage before the end of its term.
- For a closed variable-rate mortgage, the penalty is three months' interest on the outstanding balance.
- For a closed fixed-rate mortgage, the penalty is the greater of three months' interest or the Interest Rate Differential (IRD) — the interest the lender would lose by re-lending the money at today's rate.
- Big-6 banks typically calculate IRD using their posted rates, which can produce penalties three to ten times larger than the three-month method used by most monoline lenders.
- The only way to know your exact amount is to request a written payout statement from your lender; the figure on an online calculator is an estimate, not a binding quote.
The day you ask ‘how much will this cost me?’
Many homeowners learn what a prepayment penalty is the day they call their lender. They are thinking about refinancing, moving for a new job, or paying off a chunk of their mortgage. The number that comes back — sometimes five figures — is rarely the one they expected.
A closed mortgage is one where you have agreed to keep the loan with your lender for a set term, often three or five years. Breaking your mortgage means ending that agreement early, whether by paying it off, switching lenders, or refinancing. The penalty is what the lender charges to cover the interest income they are losing. Our mortgage glossary covers each term in plain English.
The penalty is real, but not fixed in stone. Understanding how it is calculated, and what your options are, is the first step toward deciding whether breaking your mortgage makes sense for you.
Pick your path
Use this checklist to jump to the section most relevant to your situation:
The two ways Canadian lenders calculate your penalty
Three months' interest is the simpler calculation. Your lender multiplies your outstanding balance by your contract interest rate, then takes one-quarter of that figure. On a $400,000 balance at a 5% rate, three months' interest is approximately $5,000.
The Interest Rate Differential (IRD) only applies to fixed-rate mortgages. It estimates the interest the lender would lose by re-lending the money at today's rate for the time left on your term. The math has two inputs: your original rate (or your discounted rate at signing) and a comparison rate the lender uses today. For fixed-rate mortgages, the lender charges whichever is larger — three months' interest or the IRD.
Open mortgages do not carry penalties at all, but their higher interest rates usually outweigh the flexibility for borrowers staying put. You can model different scenarios using the Pegasus prepayment penalty calculator.
| Your mortgage type | Penalty method | Typical size | Lender pattern |
|---|---|---|---|
| Closed fixed-rate | Greater of 3 months' interest OR IRD (Interest Rate Differential) | Often the largest | Big-6 banks use posted-rate IRD; monolines typically use discounted-rate IRD |
| Closed variable-rate | 3 months' interest only | Smaller, predictable | Most lenders treat variable-rate penalties uniformly |
| Open (fixed or variable) | No penalty for any prepayment | None | Higher contract rate is the trade-off for flexibility |
A worked example: a $450,000 fixed-rate mortgage at year three of five
Suppose you signed a five-year fixed-rate mortgage three years ago for $500,000. Today your balance is $450,000, with two years left on your term, and you want to refinance at a lower rate. The figures below are illustrative — your actual penalty depends on your contract.
The three-months'-interest calculation is straightforward. If your contract rate is 5.20%, three months' interest on $450,000 is approximately $5,850.
The IRD calculation depends on whose comparison rate is used. Suppose your lender's two-year comparison rate today is 4.20%. The rate gap is 1.00%. Applied to your $450,000 balance over two years remaining, the IRD is roughly $9,000.
Lender choice matters. A monoline lender — a mortgage company without retail branches — typically uses its discounted rate as the comparison rate. A Big-6 bank typically uses its posted rate, the advertised rate before your original discount. The Big-6 IRD can climb to roughly $18,400 or more on the same balance.
Same mortgage, same balance, same remaining term — three different penalty figures. Try your own numbers in the Pegasus mortgage refinance calculator.
Why your friend's penalty was $3,000 and yours is $18,000
If two homeowners with similar mortgages land on wildly different penalty figures, the difference is rarely about negotiation — it is structural. Big-6 banks calculate the IRD using posted rates, which are usually higher than the rates they actually offer borrowers. That artificial rate gap inflates the IRD.
Monoline lenders, which sell mortgages primarily through brokers, typically use their discounted contract rates. The IRD shrinks accordingly, often producing a penalty closer to the three-months'-interest floor.
Neither approach is hidden — both are spelled out in the mortgage contract. The Financial Consumer Agency of Canada requires federally regulated lenders to disclose the penalty calculation in plain language and provide a toll-free line for an exact quote.
What changes is what you know at origination. According to Razi Khan, Founder and Mortgage Broker at Pegasus, choosing a lender means weighing not just today's rate but the cost of flexibility if life changes.
Your step-by-step roadmap to a real number
Estimates from online calculators are useful starting points. Your actual penalty comes from your lender in writing. Here is how to get there:
- 1Find your contractLocate your mortgage contract or commitment letter. Confirm whether your rate is fixed or variable and whether the mortgage is closed or open.
- 2Note your numbersNote your outstanding balance and the months remaining on your current term. Both figures appear on your most recent mortgage statement.
- 3Request a written payout statementCall your lender. Federally regulated lenders are required to provide a free, non-binding payout statement showing the exact penalty as of the quote date, plus any administrative fees.
- 4Cross-check with a calculatorRun the same numbers through the Pegasus prepayment penalty calculator. If your written quote is materially higher than the estimate, ask your lender to walk you through their calculation.
- 5Ask about prepayment privilegesMost closed mortgages allow you to pay down 10% to 20% of the original principal each year without penalty. Using your privilege before breaking can reduce the balance the penalty is calculated against.
- 6Ask about porting or blend-and-extendIf you are moving, porting your existing rate and term to a new property may eliminate the penalty entirely. If you are refinancing, ask about blend-and-extend. In Quebec, mortgage discharge and re-registration require a notary, which adds cost and time.
Should you actually break? The break-even test
Suppose your penalty quote is $12,000 and refinancing would drop your monthly interest cost by $300. The break-even is 40 months. If you plan to stay in your home longer than that, the refinance typically pays off. If your time horizon is shorter, waiting until renewal is usually cheaper.
Two caveats. Include all costs in the penalty figure — discharge fees, legal fees, any cash-back clawback. And remember that life events can override the math. Selling for a job move, consolidating high-interest debt, or stabilising payments after a separation are decisions where the break-even is a guide, not a verdict. The Pegasus mortgage refinance guide walks through the full comparison.
| Penalty cost | Save $150 / mo | Save $300 / mo | Save $500 / mo |
|---|---|---|---|
| Penalty $5,000 |
34 mo 2 yr 10 mo Worth it |
17 mo 1 yr 5 mo Strong |
10 mo 10 mo Strong |
| Penalty $12,000 |
80 mo 6 yr 8 mo Too long |
40 mo 3 yr 4 mo Borderline |
24 mo 2 yr 0 mo Worth it |
| Penalty $20,000 |
134 mo 11 yr 2 mo Too long |
67 mo 5 yr 7 mo Too long |
40 mo 3 yr 4 mo Borderline |
Common mistakes Canadian homeowners make with prepayment penalties
Many costly errors happen before the payout statement arrives. Watch for these:
- Trusting a verbal quote. Phone estimates are rough. The only figure that matters is the written payout statement.
- Assuming all lenders calculate the same way. Big-6 banks and monoline lenders use different reference rates for the IRD. The gap can be thousands of dollars.
- Forgetting unused prepayment privileges. A lump-sum payment before breaking can shrink the balance the penalty is calculated against, sometimes by $1,000 to $3,000.
- Comparing the penalty only to monthly savings. Compare against total interest savings over the new term, not just one month.
- Ignoring portability. If you are moving, porting your existing rate and term to a new property may eliminate the penalty entirely.
- Skipping blend-and-extend. Some lenders offer to combine your current rate with a new rate for additional funds — often without breakage.
- Signing the discharge before reviewing alternatives. Once the mortgage is paid out, the lender's flexibility disappears. Pegasus's guide on how to avoid an expensive penalty for breaking your mortgage covers each tactic in detail.
Frequently asked questions
How much is the prepayment penalty on a $500,000 mortgage in Canada?
How is the interest rate differential (IRD) calculated on a Canadian mortgage?
Why is my mortgage prepayment penalty so high?
Is it worth breaking my mortgage to get a lower interest rate?
Can I negotiate or reduce my mortgage prepayment penalty?
Do I have to pay a prepayment penalty when I sell my house?
Do all Canadian lenders calculate the mortgage penalty the same way?
Is a mortgage prepayment penalty tax deductible in Canada?
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About the author
Razi Khan
Founder, CEO & Licensed Mortgage Broker · Pegasus Mortgage Lending · Toronto, Ontario · FSRA Lic # 11479
Razi Khan is the Founder, CEO, and a licensed Mortgage Broker at Pegasus Mortgage Lending Center Inc., based in Toronto. With over 20 years of experience in the Canadian mortgage industry, Razi has personally guided more than 3,000 clients through some of the most complex and high-stakes financial decisions of their lives — from first-time purchases in the GTA to refinancing strategies, alternative lending solutions, and cross-border mortgages for Canadians buying in the United States.
Razi founded Pegasus in October 2008, launching the brokerage at the height of a global financial crisis. He works across the full spectrum of borrower profiles, with particular expertise in complex files including self-employed borrowers, credit-challenged clients, and investors building multi-property portfolios.
Learn more about Razi Khan →Sources & References
- Financial Consumer Agency of Canada — Mortgage prepayment penalties
- Department of Finance Canada — Canadian Mortgage Charter (2023)
- RBC Royal Bank — Mortgage Prepayment Charge Calculator
- TD Canada Trust — Mortgage Prepayment Calculator
- CIBC — Mortgage Prepayment Charge Calculator
- WOWA — Mortgage Penalty Calculator 2026
- Ratehub — Mortgage Penalty Calculator Canada
- Interest Act (R.S.C., 1985, c. I-15)