Blend-and-Extend at Mortgage Renewal
Blend-and-extend lets you blend your existing contract rate with today's market rate for the remaining months, then extend into a new term — without paying a full break penalty.
Reviewed by Scott Dillingham · Licensed Mortgage Agent (Ontario, Level 2) · Updated May 22, 2026
Will anyone renew this file?
Blend-and-extend lets you blend your existing contract rate with today's market rate for the remaining months, then extend into a new term — without paying a full break penalty. It's offered by most Big 6 banks when you're mid-term or approaching renewal with a large rate gap.
Key Takeaways
- • Best when you're mid-term with a high contract rate and a large IRD penalty to break.
- • The new rate is a weighted average — not automatically the lowest market rate.
- • You stay with the same lender; switching may still win if the rate gap is large enough.
- • Always compare blend-and-extend vs. waiting for renewal vs. broker switch.
How the blended rate is calculated
Banks typically blend: (remaining months × current rate + new term months × market rate) ÷ total months. The exact formula varies by lender. Use our calculator to model scenarios before you call retention.
When it makes sense
- IRD penalty would exceed $10,000+ if you broke today
- You want to lock today's lower rates without switching lenders
- You're happy with prepayment terms and don't need to shop the full market
See also: early renewal, IRD penalties, and lender pages (RBC, TD).
Run blend-and-extend calculator — Model your current rate, market rate, and months remaining to estimate a blended payment.
Related Guides
Blend-and-Extend Calculator
Model a blended rate vs. breaking and re-qualifying.
Prepayment Penalty Calculator
Estimate IRD or 3-month interest before breaking early.
IRD vs. 3-Month Interest Penalty
Breaking a mortgage early — how both penalty methods are calculated.
Early Mortgage Renewal
Renewing before maturity — penalties, timing, and when it pays.
Switch vs. Stay Calculator
Compare staying with your lender vs. switching, net of fees.
Switching Lenders at Renewal
How to change lenders at renewal — prescribed-MQR exempt on uninsured straight switches; overlays remain.
Will anyone renew this file?
No credit pull. Free. Brokers who handle these files every week.