Breaking your mortgage is worth it when the interest you save over the remaining term is greater than the penalty you pay to break. That is the whole framework. Everything else is just filling in the numbers.
Pekoe Mortgages is licensed in Ontario under FSRA Licence #13321 and in Alberta under RECA. We work with borrowers across both provinces who face this exact decision.
What Does “Breaking” Your Mortgage Mean?
Breaking your mortgage means paying it out before the end of your term. Every lender charges a penalty for this, because you are walking away from a contract.
The penalty is either three months’ interest (common for variable-rate mortgages) or the Interest Rate Differential (IRD), whichever is greater for fixed-rate mortgages. IRD penalties can be substantially larger. For a full explanation of how penalties are calculated, read our post on how mortgage penalties are calculated.
The question this post answers is not how the penalty is calculated. It is whether the penalty is worth paying.
The Break-Even Rule
Breaking your mortgage pencils out when the interest you save over your remaining term exceeds the penalty. If the savings are larger than the cost, breaking makes financial sense. If the penalty is larger, staying put (or exploring alternatives) is the better move.
The calculation is straightforward in principle: get your exact penalty from your lender, estimate the interest you would save at the new lower rate over the months remaining, and subtract the penalty. A positive number means breaking is worth considering. The tricky part is getting accurate inputs, particularly the IRD penalty, which varies by lender and by how their posted-rate spread is calculated.
The break-even rule for breaking your mortgage: savings over the remaining term must exceed the penalty to break.
How to Run the Break-Even Math
Follow these four steps:
1. Get your exact penalty in writing. Call your lender and ask for the penalty as of a specific date. Do not estimate it. Variable penalties are usually predictable; IRD penalties on fixed mortgages are not. 2. Find the rate gap. Subtract the new rate from your current rate. This is your monthly saving per dollar of balance. 3. Estimate the interest saved over the remaining term. Multiply your balance by the rate gap, then by the number of years remaining. This is a simplified estimate. 4. Subtract the penalty. If the result is positive, breaking may be worth it. If negative, it is not.
Illustrative Worked Example
*This example is illustrative only. It uses simplified math and does not account for amortization, lender-specific IRD methods, or fees. Have a broker run your exact numbers.*
| Input | Value |
|---|---|
| Remaining balance | $300,000 |
| Current rate | 5.00% |
| New rate available | 3.50% |
| Rate gap | 1.50% |
| Remaining term | 3 years |
| Simplified interest saved | $13,500 |
| Illustrative IRD penalty | $9,000 |
| Net benefit (savings minus penalty) | $4,500 |
In this scenario, breaking pencils out: $13,500 in estimated savings minus a $9,000 penalty leaves a net benefit of $4,500.
Note that amortization means your balance declines over 3 years, so actual interest saved would be somewhat lower than the simplified figure. The real number requires your exact amortization schedule and your lender’s specific penalty methodology. A broker will work through both.
The break-even math is always specific to your balance, your rate gap, and your lender’s penalty calculation.
What Pushes the Decision Each Way
A few factors decide whether breaking is worth it. The table shows which way each one points.
| Factor | Leans toward breaking | Leans toward staying |
|---|---|---|
| Rate gap | Large (your rate well above market) | Small |
| Time left in term | Long (more months to save) | Short (near maturity) |
| Penalty type | Three months’ interest (variable) | Large IRD (fixed) |
| Plans for the home | Staying long term | Selling or moving soon |
When Breaking Usually Makes Sense
Breaking tends to make sense when three factors align: a large rate gap, a long remaining term, and a small penalty.
A variable-rate mortgage often carries a penalty of just three months’ interest, which can be relatively modest. If rates have fallen and you have two or more years left in your term, the savings can clear that penalty quickly. A long remaining term gives you more months to recoup the cost.
A large rate gap amplifies every month of savings. A 1.5% drop on a $300,000 balance is $4,500 per year in interest before amortization is factored in. A 0.25% drop on the same balance saves only $750 per year, which is a much slower payback on a $9,000 penalty.
When It Usually Does Not
Breaking rarely makes sense when you are close to maturity, when the rate gap is small, or when you are facing a large IRD penalty on a fixed mortgage.
If you have six months or less remaining, the interest savings over that short window will almost never exceed even a modest penalty. Waiting until renewal costs nothing and gets you a clean start with any lender. We have written about this directly in our post on what to do when a high penalty makes refinancing difficult.
A large IRD penalty on a fixed-rate mortgage is the most common reason breaking does not work out. Some lenders calculate IRD using posted rates, which inflates the penalty significantly. The penalty on a 5-year fixed can reach tens of thousands of dollars, easily wiping out years of rate savings.
Alternatives to Breaking
If the math does not work, there are three paths worth considering before you walk away from your term.
Blend-and-extend lets you mix your current rate with a new lower rate without breaking the mortgage. Your lender blends the two rates over a new term. The effective rate is not as low as a full refinance, but there is no penalty.
Waiting for your renewal date costs nothing and is often the right answer. If you have less than a year remaining, waiting preserves your penalty-free start. If you plan to switch lenders at renewal, a broker can help you prepare months in advance.
Porting is relevant if you are moving. Many fixed-rate mortgages allow you to transfer your existing rate to a new property, which avoids the penalty entirely if the timing and purchase price align.
A Broker Runs Your Real Numbers, Not Estimates
The framework above tells you whether breaking is worth it in principle. Getting the right answer for your specific mortgage requires your exact penalty from your lender, your actual amortization schedule, and a comparison of current rates across multiple lenders.
A broker has no product bias. We get your exact penalty in writing, run the real break-even calculation against live market rates, and tell you honestly whether breaking makes sense or whether a blend-and-extend or a wait-for-renewal strategy serves you better.
Check today’s live rates at pekoe.ca/rates, updated daily. You can also get a pre-approval certificate in seconds.
The break-even on breaking your mortgage is specific to your numbers, not a general rule of thumb.
Frequently Asked Questions
How do I know if breaking my mortgage is worth it?
Compare the total interest you would save over your remaining term at the lower rate against the penalty your lender will charge to break. If the savings are larger than the penalty, breaking pencils out. Have a broker pull your exact penalty and run the comparison with current market rates before deciding.
How much does it cost to break a mortgage in Canada?
The cost depends on your mortgage type. Variable-rate mortgages typically carry a penalty of three months’ interest, which on a $300,000 balance at 5% works out to roughly $3,750. Fixed-rate mortgage penalties are based on the IRD and can be significantly higher, sometimes $10,000 to $20,000 or more on larger balances, so ask your lender for the exact figure.
Is it worth breaking a fixed mortgage when rates drop?
It can be, but the IRD penalty on fixed mortgages is the main obstacle. Some lenders calculate IRD using their posted rates rather than contract rates, which inflates the penalty. Run the break-even math against your exact penalty before assuming the rate drop makes breaking worthwhile.
Can I avoid the penalty by waiting for my renewal date?
Yes. If you are within 12 months of maturity, waiting is often the better financial decision. You pay no penalty, you can shop for a new rate immediately, and you are free to switch lenders at renewal without restriction.
Should I get a broker to calculate this?
Yes. The break-even calculation looks simple, but the IRD penalty varies by lender and by how posted versus contract rates are applied. A broker pulls your actual penalty from your lender, compares it against live market rates, and gives you a specific answer at no cost.
Run Your Break-Even Before You Decide
Breaking your mortgage can save thousands, or it can cost you thousands more than you expected. The only way to know is to run the numbers against your actual penalty and your actual rate gap.
At Pekoe Mortgages, we run this analysis for borrowers across Ontario and Alberta with no obligation. If your renewal is coming up and you are weighing your options, the Renewal Negotiation Playbook is a step-by-step course that walks you through exactly how to negotiate your rate, when to switch, and how to avoid leaving money on the table.