How the blend works
Your existing rate and remaining term are mathematically blended with the lender's current rate for a new, longer term. If rates have fallen, your rate drops partway. If you are adding money, a blend-and-increase, the new funds come in at current rates, averaged with your old ones. No penalty is charged because you are staying with the lender.
When it is genuinely good
Mid-term equity take-outs are the classic case: a renovation or investment where breaking the mortgage would cost a large differential penalty. The blend avoids the penalty and keeps everything in one payment. It is also useful when rates have dropped sharply and the blend captures part of the drop at zero penalty cost.
- No prepayment penalty on the blended portion
- One mortgage, one payment, no refinance legal costs
- Fast, since you are staying with your lender
The catch
The blended rate is whatever your lender offers, and they know you are captive: the alternative is paying the penalty to leave. Blend offers are routinely a few tenths above the lender's best new-customer rates. Over a fresh five-year term, that premium can quietly exceed the penalty you avoided.
Always price the exit too
Before accepting any blend, get your exact penalty figure and a written quote from a competing lender. Three scenarios, blend, break and switch, do nothing, each costed over the same time horizon, on one page. The blend wins often enough to be worth checking, and loses often enough to make checking mandatory.
Frequently asked questions
- Do I re-qualify for a blend and extend?
- For a straight blend, usually minimally. For a blend-and-increase where you are borrowing more, yes, the new money requires qualification.
- Can I blend a variable rate mortgage?
- Most blend features apply to fixed terms. Variable holders usually lock into a fixed term instead, which is a different mechanism with its own pricing questions.
- Is the blended rate negotiable?
- Yes. The first offer is rarely the best. A competing written quote is your leverage, even if you intend to stay.