When to Refinance or Break Your Mortgage in Canada (The Penalty Math)

First: renewal or mid-term?

In Canada, “refinancing” splits into two very different events:

At renewal (end of term): your term is up, you owe the remaining balance, and you can move it anywhere penalty-free. This is the easy win — lenders count on inertia, so the first renewal letter is rarely their best rate. Shop 3–4 lenders or a broker 4–6 months before your renewal date.

Mid-term (breaking the mortgage): you pay a prepayment penalty to exit early — either to grab a much lower rate, access equity, or consolidate debt. This is where the math matters.

The penalty: the number that decides everything

• Variable rate: ~3 months’ interest. On a $400,000 balance at 5%, roughly $4,900. Often worth paying for a meaningfully better rate.
• Fixed rate: the greater of 3 months’ interest or the IRD — the rate gap between your contract and the lender’s current rate for your remaining term, applied to your balance. Big-bank posted-rate IRD formulas inflate this notoriously. Get the exact figure from your lender; it’s free to ask and it’s the whole decision.

The break-even math

Net benefit = interest saved over the comparison period − penalty − costs (legal ~$800–$1,500, appraisal ~$300–$500, discharge fees)

Example: $400,000 balance, 2 years left on a 6.3% fixed term, offered 4.5% elsewhere. Rough interest saving over 2 years: ~$13,500. If the IRD penalty is $14,000 plus $1,500 in costs — you lose. If it’s a variable-style penalty of $4,900 — you pocket ~$7,000. The refinance calculator runs the savings side; put your lender’s penalty quote in as the “closing costs.”

Ways to shrink the penalty

1. Blend-and-extend: blend your old rate with the new one, no penalty. Compare the blended rate against the true market rate — sometimes the “penalty” is just hidden in the blend.
2. Prepay first. Most mortgages allow 10–20% annual prepayments. Maxing that before breaking reduces the balance the penalty is calculated on.
3. Time it near renewal. 6 months from term end? Waiting often beats paying.
4. Port instead. Moving homes? Porting your mortgage to the new property avoids breaking it entirely.

Good reasons to break anyway

• Rate savings that clearly exceed the penalty (run the math, don’t guess)
• Consolidating 20%+ credit card debt into a ~5% mortgage — see our consolidation guide for the cautions
• Accessing equity for a genuinely productive use (renovation that adds value, not consumption)

The bottom line

At renewal: always shop — it’s free money. Mid-term: the penalty is the decision, so get the real quote before doing anything else. The refinance calculator plus your lender’s penalty figure gives you the answer in five minutes.