Breaking a mortgage in Canada before the term ends — whether to refinance, sell, or switch lenders — almost always triggers a prepayment penalty. For closed fixed-rate mortgages, these penalties can be shockingly large. Understanding how penalties are calculated before you sign a mortgage is one of the most important financial decisions you'll make as a Canadian homeowner.
When Are Prepayment Penalties Triggered?
A prepayment penalty applies when you exceed your lender's annual prepayment privileges. Common triggering events include:
- Selling your home before the term ends (and not porting your mortgage)
- Refinancing to access equity or get a lower rate mid-term
- Paying off the mortgage in full before term end
- Making a lump-sum payment above your allowed annual prepayment limit
Penalties do NOT apply at renewal (when you wait for the maturity date), or when you stay within your annual prepayment privileges (typically 10-20% of original balance per year).
Two Types of Penalties: 3-Month Interest vs. IRD
For closed mortgages in Canada, the prepayment penalty is always the greater of:
- 3 months' interest on the outstanding balance at your contract rate
- Interest Rate Differential (IRD) — the difference between your rate and the lender's current rate for the remaining term, applied to your balance over the remaining time
3-Month Interest Calculation
This is straightforward: Outstanding balance × annual rate ÷ 4.
3-month interest = $450,000 × 0.0489 ÷ 4 = $5,501
IRD Calculation
IRD is more complex and typically produces a much larger number when rates have fallen since you locked in. The formula: (Your rate − Lender's current comparable rate) × Balance × Remaining months ÷ 12.
IRD = (4.89% − 3.79%) × $450,000 × 2.5 = $12,375
Penalty = greater of $5,501 and $12,375 = $12,375
Variable vs. Fixed: Penalty Difference
| Mortgage Type | Penalty | Typical Amount |
|---|---|---|
| Variable / Adjustable Rate | 3 months' interest only | $4,000 – $8,000 |
| Fixed Rate (monoline lender) | Greater of 3-month interest or IRD (fair formula) | $3,000 – $15,000 |
| Fixed Rate (major bank) | Greater of 3-month interest or IRD (posted rate formula) | $100 – $40,000+ |
| Open Mortgage | None | $0 |
How to Minimize or Avoid Penalties
- Wait until maturity: The safest and free option — just wait for your term to end before switching or paying out.
- Use prepayment privileges: Most mortgages allow 10-20% annual lump-sum payments. Use these consistently to reduce your balance (and therefore any future penalty).
- Port your mortgage: If you're selling to buy another home, porting your mortgage to the new property avoids the penalty entirely.
- Choose a monoline lender: Their IRD formula is fairer — penalties are typically much lower than at major banks.
- Choose variable: Variable rate mortgages have a maximum 3-month interest penalty, regardless of when you break.
- Choose a shorter term: A 2-year fixed has maximum 24 months of IRD exposure vs. 60 months for a 5-year.
- Blend and extend: Instead of breaking your mortgage, ask about blending your current rate with a new rate — avoids the full penalty.
Prepayment Privileges: What's Allowed Without Penalty
Most Canadian mortgages include annual prepayment privileges that let you pay down extra principal without penalty. Typical allowances:
| Lender Type | Lump Sum Allowed | Payment Increase Allowed |
|---|---|---|
| Major banks | 10-20% of original balance/year | 10-20% of original payment/year |
| Monoline lenders | 15-20% of original balance/year | 15-20% of original payment/year |
| Credit unions | Varies — often 10-20% | Varies |
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Get KOHO Free — Use Code 45ET55JSYAFrequently Asked Questions
Rarely, but sometimes. If you're refinancing with the same lender, they may waive or reduce the penalty to keep your business. It never hurts to ask — especially if you have a strong relationship or are a long-standing customer.
If the mortgage was on a rental or investment property, the penalty may be deductible as a financing expense. For your principal residence, it is not deductible. Consult a tax professional for your specific situation.
Call your lender and ask for a prepayment penalty quote for today's date. Get it in writing. You can also use our IRD Penalty Calculator for an estimate, but your lender's official calculation is authoritative.
No. Paying out a mortgage, even with a penalty, does not negatively impact your credit score. In fact, paying off a debt is generally neutral to positive for your credit profile.