You can switch mortgage lenders at any point during your mortgage term — but breaking a fixed-rate mortgage before renewal typically comes with a prepayment penalty. Whether it’s “too late” depends on how much the penalty costs versus how much you save by switching.
When switching costs nothing: at renewal
The safest and cheapest time to switch lenders is at the end of your mortgage term — your renewal date. No prepayment penalty applies. Your lender must notify you of your renewal terms at least 21 days before maturity (federally regulated lenders).
What many Canadians miss: Your lender sends a renewal offer, but you’re not obligated to accept it. You can shop around and take your mortgage to another lender — or a mortgage broker can shop it for you. The new lender often covers your legal costs for a switch at renewal.
Breaking your mortgage mid-term: the penalty
If you want to switch lenders before your renewal date, your current lender will charge a prepayment penalty. For fixed-rate mortgages, this is typically calculated as the greater of:
- Three months’ interest, or
- Interest Rate Differential (IRD)
The IRD is the difference between your current rate and the rate the lender can re-lend the money at for the remaining term, multiplied by the outstanding balance and remaining term. IRDs can be substantial — often $5,000–$25,000 or more on a typical mortgage.
Variable-rate mortgages typically charge only three months’ interest — a much more predictable and lower penalty.
How to calculate if switching is worth it
To determine if breaking and switching is worth it:
- Get the exact penalty from your current lender (call them or check online)
- Calculate your monthly savings at the new (lower) rate
- Divide penalty by monthly savings = break-even months
Example: Current mortgage: $450,000 at 5.8%, 3 years left on 5-year term New rate available: 4.9% Monthly savings: ~$240/month Penalty: $9,600 Break-even: 40 months (3.3 years)
If you plan to keep the mortgage for more than 40 months, switching saves money. If you might sell or pay out the mortgage sooner, it probably doesn’t.
Blend and extend: the middle-ground option
Before paying a full penalty to switch lenders, ask your current lender about a blend and extend. This is an option at many Canadian lenders (especially the Big Six banks) where the lender blends your existing rate with their current rate, producing a new weighted average rate — then extends the term.
How it works:
- Current rate: 5.8% with 24 months remaining
- Current market rate: 4.8% for a new 5-year term
- Blended rate offered: approximately 5.3% for a new 5-year term
You get a lower rate immediately, the lender avoids losing you, and you avoid the full IRD penalty. The blended rate is not as good as the full market rate, but you pay no penalty.
The catch: You’re locked in with the same lender for another full term. If rates fall further, you’re stuck again. Compare the blended offer to the break-and-switch math before deciding.
The costs of switching at renewal
Switching at renewal is low-cost, but not always zero:
| Cost | Typical Amount | Who Pays |
|---|---|---|
| Discharge fee (current lender) | $200–$350 | You (sometimes new lender covers) |
| Assignment/legal costs | $0–$1,000 | Usually new lender covers at renewal switch |
| Appraisal (if required) | $300–$500 | Usually new lender covers |
| Title insurance | $200–$400 | You |
| Mortgage broker fee | $0 | Broker paid by lender |
In practice: Most lenders offer to cover discharge fees and legal costs to attract a switch at renewal. This makes renewal the ideal time to shop — you bear almost no costs.
When switching mid-term makes sense
- Interest rates have fallen significantly since you locked in
- Your penalty is small (variable-rate mortgage or fewer months remaining)
- You’re consolidating into a refinance (adding a HELOC, changing amortization, changing payment structure)
- Your lender is being uncompetitive and won’t negotiate on renewal terms
- You’re selling and can’t port the mortgage (the property doesn’t qualify)
Transferring your mortgage (porting)
If you’re selling one home and buying another, you may be able to port your mortgage — transfer your existing rate and terms to the new property without a penalty. Portability is a feature of many Canadian mortgages (check your mortgage agreement).
Porting is subject to approval on the new property and must usually be completed within 60–120 days of your sale.
The mortgage renewal negotiation most Canadians miss
At renewal, you have the most leverage. Most lenders send a low-effort renewal offer — not their best rate. Do not simply sign and return. Steps:
- Check posted rates at competitors (big banks, credit unions, online lenders like nesto, True North Mortgage)
- Bring a competing offer to your current lender and ask them to match
- If they won’t match, switch — the new lender typically covers the switch costs
Switching at renewal is costless to you in most cases. Don’t leave free money on the table.
Frequently asked questions
Can I switch lenders without penalty? Yes — at your renewal date. You can also switch penalty-free if your mortgage agreement includes a clause waiving the penalty (rare), or if you’re in an open mortgage (which typically has a higher rate in exchange for flexibility).
My fixed mortgage has 18 months left — is it worth breaking? At 18 months remaining, the IRD calculation typically produces a lower penalty than at 36+ months remaining. Get the actual penalty quoted by your lender, calculate the monthly savings at the new rate, and determine the break-even. At 18 months, the window to recoup the penalty is short — it’s often worth waiting for renewal instead.
Does switching lenders affect my credit score? The new lender will perform a hard credit inquiry as part of their approval process, which may temporarily reduce your score by 5–10 points. If multiple lenders check within a short window (14–45 days depending on the model), they’re typically counted as one inquiry. Long-term, a lower-rate mortgage that improves your debt service ratio is credit-neutral or slightly positive.
Can I switch from variable to fixed mid-term without penalty? Many variable-rate mortgages allow conversion to a fixed rate mid-term without penalty. The new fixed rate is whatever the lender is currently offering for the remaining term length. This is not “switching lenders” — it’s a conversion within the same lender. Check your mortgage agreement for conversion options.
Should I use a mortgage broker when switching? Brokers are especially valuable for mid-term switches because they can compare multiple lenders’ penalties (some lenders calculate IRD more generously than others) and know which lenders are offering the best incentives to take on a switch. Brokers are paid by the lender, not you — there’s no reason not to use one when switching.
How does the stress test apply if I switch lenders? If you switch lenders at renewal without changing the mortgage amount or amortization, you are exempt from the mortgage stress test (as of the 2024 federal rule change). You only need to re-qualify at the stress test rate if you refinance (increase the mortgage amount). This makes switching at renewal significantly easier than it was before 2024.