Mortgage Refinance Savings Calculator
Find out exactly how much you could save by refinancing your mortgage to a lower rate. Includes break-even analysis and prepayment penalty consideration.
Calculate Your Refinance Savings
Lenders typically charge 3 months' interest or IRD (Interest Rate Differential), whichever is greater.
What Is Mortgage Refinancing?
Mortgage refinancing means replacing your existing mortgage with a new one — typically at a lower interest rate, with different terms, or to access home equity. In Canada, refinancing is most commonly done at the end of a mortgage term (when your rate renews), but it can also be done mid-term if the savings justify the prepayment penalty.
When Does Refinancing Make Sense in Canada?
Refinancing makes financial sense when your interest savings over the remaining amortization period exceed the cost of breaking your current mortgage. As a general guideline, refinancing is worth exploring when:
- Your current rate is 0.5% or more above today's best available rates
- You have significant remaining amortization (10+ years) to maximize savings
- Your prepayment penalty is less than 12–18 months of interest savings
- You want to consolidate high-interest debt using your home equity
- You need to change your mortgage terms (e.g., extend amortization to lower monthly payments)
Understanding the Prepayment Penalty
Breaking a fixed-rate mortgage in Canada typically triggers one of two penalties: three months' interest, or the Interest Rate Differential (IRD), whichever is greater. The IRD is calculated based on the difference between your contract rate and your lender's current rate for the remainder of your term.
Variable-rate mortgages typically only carry a three-month interest penalty, which makes them significantly cheaper to break. This is one key reason variable-rate holders often have more flexibility to refinance when rates drop.
How the Break-Even Calculation Works
The break-even point is the number of months you must stay in your new mortgage before the cumulative savings exceed your penalty cost. For example:
Example Scenario
Current mortgage: $500,000 at 6.5% | New rate: 5.0% | Monthly saving: ~$445 | Penalty: $8,000
Break-even: $8,000 ÷ $445 = 18 months
If you plan to keep this mortgage for 3+ years, refinancing makes financial sense.
Frequently Asked Questions
Can I refinance my mortgage before my term ends in Canada?
Yes. You can break a closed mortgage at any time, but you will be charged a prepayment penalty. Open mortgages allow refinancing without penalty but come with higher rates. Most Canadians refinance at renewal to avoid the penalty entirely.
Does refinancing affect my credit score in Canada?
Refinancing involves a hard credit inquiry, which may temporarily reduce your score by a few points. However, the long-term impact of lower monthly payments and reduced debt generally improves your credit health.
Can I get a lower rate if I have a high-ratio mortgage (less than 20% equity)?
You cannot refinance to borrow more than 80% of your home's value without CMHC insurance. If your equity is below 20%, your refinancing options are more limited. Building equity first may give you access to better rates and more flexible terms.
How often can you refinance in Canada?
There is no legal limit on how often you can refinance, but each refinance may trigger a penalty and legal costs. Most homeowners refinance at the end of their mortgage term (every 1–5 years) to avoid break penalties.
When Does Refinancing Make Sense in Canada?
Refinancing your Canadian mortgage means breaking your existing mortgage and replacing it with a new one — typically to access a lower interest rate, change your amortization, or tap into your home equity. The key question is always: do the savings outweigh the cost to break?
The most important number is your break-even point: how many months of lower payments it takes to recover your prepayment penalty and legal fees. If you plan to stay in your home past the break-even, refinancing makes financial sense. If you're selling soon, it likely does not.
For fixed-rate mortgages, the penalty is the greater of 3 months' interest or the IRD (Interest Rate Differential). When rates have dropped significantly, the IRD can be very large — sometimes $10,000–$30,000+. Variable-rate penalties are typically just 3 months' interest, making variable-rate holders much cheaper to break early.
Top Reasons Canadians Refinance
Lower interest rate
Even a 0.5% rate drop can save thousands over a 5-year term. Use this calculator to find your exact savings.
Access home equity
Refinancing up to 80% LTV gives you cash for renovations, education, investments, or debt consolidation.
Shorten amortization
Refinance to a shorter amortization and pay off your home years faster while paying significantly less total interest.
Switch lender type
Move from a private or B lender to an A lender (major bank or credit union) for much lower rates after improving your credit.
Frequently Asked Questions
What is an IRD penalty in Canada?
An IRD (Interest Rate Differential) penalty is charged when you break a fixed-rate mortgage early. It is the difference between your contracted rate and the lender's current rate for a comparable term, multiplied by your remaining principal and time left. It can be very large when market rates have fallen.
How much does it cost to break a mortgage in Canada?
Fixed-rate mortgage penalties are the greater of 3 months' interest or the IRD — typically $3,000–$25,000+ depending on the lender and rate environment. Variable-rate mortgage penalties are usually just 3 months' interest, typically $2,000–$6,000.
Is it worth refinancing to save 0.5%?
It depends on your remaining term, mortgage balance, and penalty. On a $500,000 mortgage with 3 years left, a 0.5% rate drop saves about $7,500 in interest — often worth it if your penalty is under $5,000. Use this calculator to compare your specific numbers.
Can I refinance without a penalty at renewal?
Yes. At the end of your mortgage term, you can switch lenders, renegotiate rates, or change your terms without any prepayment penalty. Renewal is the ideal time to shop for the best rate.
Compare Refinance Rates Now
See live rates from 30+ Canadian lenders — finding a lower rate is the first step to refinancing.