Breaking your mortgage before the term ends is one of the most expensive financial decisions Canadians make — and one of the least understood. Prepayment penalties can cost thousands or even tens of thousands of dollars, but breaking your mortgage can sometimes save you money overall.
How prepayment penalties work
When you sign a mortgage, you commit to a term (usually 5 years). Breaking that commitment early means compensating the lender for the interest income they will lose.
Variable-rate mortgage penalty
3 months of interest on the remaining balance.
Example: $400,000 balance × 5.50% ÷ 12 × 3 = $5,500
Fixed-rate mortgage penalty
The greater of:
- 3 months of interest, OR
- The Interest Rate Differential (IRD)
The IRD is almost always higher, often dramatically so.
Understanding the Interest Rate Differential (IRD)
The IRD compensates the lender for the difference between your mortgage rate and the rate they could lend at today for the remaining term.
IRD formula
IRD = Outstanding balance × (Your rate − Current comparison rate) × Remaining term
Example
| Detail | Value |
|---|---|
| Outstanding balance | $400,000 |
| Your mortgage rate | 5.50% |
| Current rate for remaining term | 4.00% |
| Rate differential | 1.50% |
| Remaining term | 3 years |
| IRD penalty | $400,000 × 1.50% × 3 = $18,000 |
Compare to 3 months interest: $400,000 × 5.50% ÷ 12 × 3 = $5,500
The penalty is the greater of the two: $18,000.
Warning: Posted rate vs discount rate
Big banks often use their posted rate (not your actual rate) in the IRD calculation, making the penalty even higher. Monoline lenders typically use your actual contract rate. This can mean thousands of dollars in difference.
| Lender Type | IRD Calculation Method | Typical Penalty |
|---|---|---|
| Big banks | Based on posted rate | Higher |
| Monoline lenders | Based on contract rate | Lower |
| Credit unions | Varies | Moderate |
When breaking your mortgage makes sense
Scenario 1: Refinancing to a lower rate
If the interest savings over the remaining term exceed the penalty, it is worth breaking.
Example:
| Detail | Value |
|---|---|
| Current rate | 6.00% |
| New rate | 4.50% |
| Balance | $400,000 |
| Remaining term | 3 years |
| Monthly savings | $360 |
| Total savings over 3 years | $12,960 |
| Penalty | $8,000 |
| Net benefit | $4,960 |
Scenario 2: Selling your home
You have no choice but to break the mortgage (unless you port — see below).
Scenario 3: Divorce or separation
Refinancing to remove one person from the mortgage typically requires breaking.
Scenario 4: Debt consolidation
If you are paying 19%+ on credit card debt, rolling it into your mortgage (even with a penalty) can save significant money.
Scenario 5: Switching from variable to fixed (or vice versa)
If rates are moving and you want payment certainty.
How to minimize or avoid penalties
1. Port your mortgage
If you are moving, many lenders let you transfer your mortgage to the new property with no penalty. Same rate, same terms.
2. Blend and extend
Your lender may blend your current rate with a new rate and extend the term — avoiding a full penalty. The rate is a weighted average.
3. Use prepayment privileges
Most mortgages allow you to prepay 10%–20% of the original balance annually without penalty. Make these payments to reduce the balance before breaking.
4. Wait until renewal
If you are close to the end of your term, the penalty decreases. It may be cheaper to wait.
5. Negotiate before signing
When getting a new mortgage:
- Choose a lender that calculates IRD on your contract rate (not posted rate)
- Look for 3-month interest penalty caps
- Ensure portability and blend-and-extend options
- Read the prepayment section of the mortgage commitment carefully
Steps to take
- Call your lender — Ask for the exact penalty amount in writing
- Calculate your savings — Use our mortgage calculator to compare your current payment vs the new rate
- Factor in all costs — Penalty + legal fees + appraisal + any discharge fees
- Compare net savings — If total savings exceed total costs, breaking makes sense
- Consider alternatives — Porting, blend-and-extend, or waiting for renewal
Bottom line
Mortgage penalties are steep — especially for fixed-rate mortgages with big banks. Always get the exact penalty amount in writing before making a decision. The math is straightforward: if your savings exceed the penalty and costs, break the mortgage. If not, wait for renewal or use prepayment privileges to minimize interest in the meantime.
Step-by-step: how to break your mortgage early in Canada
- Call your lender and ask for a payout statement — this shows the exact penalty, legal discharge fees, and any other charges
- Calculate the net savings: Compare total interest at your current rate vs total interest at the new rate for the remaining term
- Shop for new mortgage rates (mortgage broker, online lenders) before calling your lender
- Ask about blend-and-extend: Some lenders waive the penalty if you extend with them at a blended rate
- Check portability: If you are selling, porting the mortgage to the new property avoids the penalty entirely
- Engage a real estate lawyer to handle the discharge and new mortgage registration ($800–$1,500 in legal fees)
Frequently asked questions
Does breaking a mortgage affect my credit score? The mortgage itself does not negatively affect your credit when broken. The new mortgage application involves a hard credit inquiry (−5 to −10 points temporarily). Paying the penalty does not create a negative credit event. Your credit score is unaffected by switching lenders as long as both mortgages are paid on time during the transition.
What is a collateral charge mortgage and why does it matter when breaking? Some lenders (TD, ING-turned-Simplii, some credit unions) register mortgages as collateral charges rather than standard charges. Collateral charges are harder to transfer to a new lender — you typically must discharge and re-register (higher legal costs of $1,000–$1,500) rather than using a simple assignment ($300–$500). Ask your lender how your mortgage is registered before assuming a simple switch is possible.
Related Reading
- Blend and Extend Mortgage Canada: How It Works and When It Beats Breaking (2026)
- When to Break Your Mortgage in Canada: The Break-Even Calculation (2026)
- How to Negotiate Your Mortgage Rate in Canada 2026
- Paying Off Your Mortgage Early in Canada — Strategies to become mortgage-free sooner
- Cash-Out Refinance in Canada — Access your home equity through refinancing
- Mortgage Renewal vs Refinance — Which option is right at your term end