Mortgage Prepayment Penalties Canada

What triggers a penalty, how much it costs, and how to legally reduce or avoid prepayment charges.

What Triggers a Prepayment Penalty?

A prepayment penalty applies when you pay off more of your mortgage than your contract allows during a term. The most common scenarios that trigger a penalty are:

• Breaking your mortgage before the term ends (selling, refinancing, switching lenders)
• Paying down more than your annual prepayment privilege in a single year
• Paying off the entire mortgage balance early (for example, from an inheritance)

Most Canadian mortgages include prepayment privileges of 15–20% per year — meaning you can prepay up to that percentage of the original mortgage amount annually without any penalty. Only amounts above this threshold trigger a charge.

The Two Penalty Formulas

Mortgage Type	Penalty Formula	Who Uses This
Variable rate	3 months interest on current balance	All variable-rate mortgages
Fixed rate — monoline	Greater of: 3 months interest OR IRD (using bond yields)	First National, MCAP, Merix, etc.
Fixed rate — Big Six bank	Greater of: 3 months interest OR IRD (using posted rates)	RBC, TD, BMO, CIBC, Scotiabank, NBC

Understanding the IRD (Interest Rate Differential)

The IRD is what makes fixed-rate bank penalties so expensive. The formula is approximately:

IRD = Mortgage Balance × (Contract Rate – Comparison Rate) × Remaining Months / 12

For Big Six banks, the comparison rate is derived from their posted rates — not actual market rates. Since posted rates are always significantly higher than actual rates (often 1.5–2% higher), the differential is artificially inflated, resulting in very large penalties.

Example: $500,000 balance, 3 years left on a 5-year term, contract rate 4.74%:

• Bank comparison rate (posted-based 3-year): 3.24% (example)
• IRD = $500,000 × (4.74% – 3.24%) × 36/12 = $500,000 × 1.5% × 3 = $22,500
• 3 months interest = $500,000 × 4.74%/12 × 3 = $5,925
• Penalty = greater of two = $22,500

The same scenario with a monoline lender using bond-based IRD might produce a penalty of $8,000–$12,000 instead.

How to Reduce or Avoid Penalties

• Use your annual prepayment privilege first: Before breaking your mortgage, make your full annual lump-sum prepayment (typically 15–20%) to reduce the outstanding balance and therefore the penalty calculation base
• Wait for the term to end: Timing your refinance or sale to coincide with your renewal date eliminates penalties entirely
• Choose a variable-rate mortgage: The 3-month interest penalty on a variable is almost always much smaller than a fixed-rate IRD
• Choose a monoline lender: Their bond-rate IRD calculation produces significantly fairer (lower) penalties than big bank posted-rate IRD
• Port your mortgage: If buying a new home, porting your existing mortgage to the new property avoids the penalty entirely
• Blend and extend: Some lenders allow you to extend your term at a blended rate with no penalty

Open vs Closed Mortgages

Open mortgages allow full repayment at any time without penalty — but carry significantly higher interest rates (typically 1–2% above closed rates). They are useful for borrowers who are certain they will pay off or sell within months. Closed mortgages have lower rates but carry the penalties described above. Most Canadian borrowers choose closed mortgages and manage around the penalty rules.

Penalty Disclosure Requirements

Federally regulated lenders in Canada are required to disclose their prepayment penalty calculation method in your mortgage documents and to provide an estimate of the penalty on request. Always request a penalty calculation in writing before deciding whether to break your mortgage. The actual penalty at time of breaking may differ slightly from estimates due to rate changes, but lenders must use the methodology disclosed in your contract.