Blend-and-extend vs break vs wait
By Andrew · Sources: FCAC's blend example, TD, RBC, and CIBC's Alberta standard terms. Your lender's worksheet overrides the illustration.
A blend feels like a favour because nobody says the word penalty. The cost is the cheap months you stop living in. The arithmetic is short. The decision is which clock you are willing to restart.
The choice in one paragraph
A blend-and-extend keeps you with the same lender, mixes the rate you have left with a rate that lender will offer today, and starts a new longer term now, usually without a prepayment penalty. Waiting until maturity keeps the old rate for the months that are left, and breaking the contract trades a penalty for the right to take a different lender's rate.
FCAC calls the blend an early renewal. The lender has to tell you how the new rate is calculated. You may still pay an administration fee. A blend-to-term uses the mixed rate only until the original maturity date. A blend-and-extend uses it for a new, longer term. Neither one changes the amortization. The payment can fall when today's rate is below yours. It rises when today's rate is above yours, which is the case for a lot of mortgages written before 2022. The renewal playbook is the calendar around that maturity date. This page is the arithmetic for leaving it early.
The weighted-rate formula FCAC publishes
FCAC labels its method as a simplified illustration, not every lender's contract. Multiply the current rate by the months left. Multiply today's rate for the new term by the months being added. Add those two products. Divide by the number of months in the new term.
FCAC's own figures: balance $200,000, 22 years of amortization left, contract rate 5.5%, 24 months left, today's 5-year rate 4%, payments monthly. Step 1 is 5.5% × 24 = 132. Step 2 is 60 − 24 = 36. Step 3 is 4% × 36 = 144. Step 4 is 132 + 144 = 276. Step 5 is 276 / 60 = 4.6. The blended rate in the illustration is 4.6% for the next 60 months. You can check the division on a phone. You cannot check, from the illustration alone, whether your bank uses months, a present-value blend, or a posted rate as the "today" input.
The same weights on a file that is not FCAC's: $400,000 owing, 20 years of amortization left, a labelled example contract rate of 3.19% with 24 months to go. The 3.19% is an example standing in for a rate signed when mortgages were cheaper. It is not a row in the scrape. The new-rate input is the rounded 5-year fixed median from the reported-rate file, 4.35%, insured status not stated (N = 40), as of October 18, 2026. That median is self-reported by Canadian borrowers online. It is not the rate your bank will type into a blend. (3.19% × 24 + 4.35% × 36) / 60 = 3.886%, which rounds to 3.89% for the payment math below.
What the three paths cost on that file
Waiting keeps $2,257 a month for 24 months on $400,000 at 3.19%. Interest in that slice is about $24,627, and the balance falls to about $370,468. The illustration then renews at 4.35% for 36 months. That payment is $2,476, interest in the second slice is about $45,648, and interest over 60 months is about $70,275. This assumes 4.35% is still available at maturity. A hold is how you pin that down: rate holds.
Blending now at 3.89% for 60 months costs $2,401 a month, about $144 more than the current payment, and about $71,049 of interest. Against waiting, that is about $773 more. You spent it to give up 24 months at 3.19%. The blend is the bargain in FCAC's story, where 5.5% falls to 4%. It is not the bargain on this file, where the old rate is the low one.
Breaking is the third path. Because 4.35% is above 3.19%, a simple interest-rate differential here is zero, so the charge is three months' interest: $400,000 × 3.19% × 3/12 = $3,190. That is the penalty calculator. RBC's present-value step, and CIBC's Alberta terms that can add the original discount on top of three months' interest, can come out higher. Interest at the new rate for 60 months is about $79,777. Penalty plus that interest, minus waiting, is about $12,692. Breaking does not win on these inputs.
| Your situation | What to price first | Why |
|---|---|---|
| You can wait until the maturity date | A rate hold that starts on that date | The months left at the old rate are still yours. A blend spends them now. |
| You must sell, and the new house needs a mortgage | A port, then a blend only on any increase | Porting can keep the old rate on the amount you move. The increase is the part that gets today's rate. |
| You want a lower payment and rates have fallen | Blend-and-extend against the penalty plus a new loan | FCAC's illustration is this case. If your old rate is the cheap one, the blend is usually the expensive way to feel busy. |
| The penalty is three months' interest and another lender is much cheaper | Break, then the net over the new term | Divide the penalty and any unrefunded costs by the monthly saving. If you will not keep the new mortgage that long, do not break it. |
| You need to borrow more | Call it a refinance | A larger balance can bring the stress test, a new charge, and a new insurance premium. It is not a pure blend. |
| The lender will only blend off a posted rate | Ask for the rate a new customer would get, in writing | A blend against the shelf can cost more than waiting, even when the formula looks fair. |
Run the three quotes you were actually given through the renewal offer checker. It places one rate on the distribution at real mortgage rates. It does not blend. Insured and uninsured shelves are here and here. Five-year rows are on fixed and variable. The rounded variable median is 3.55% (N = 129). Compare a blend with a variable only if the commitment says the new term is variable.
Which lenders will do it
FCAC says lenders may allow an early blend, and that some institutions offer it. It is not a right, and this page will not invent a list of every bank that says yes. The pages that do describe a blend, or an early renewal that can avoid a penalty, are narrower than the slogan.
TD lets you renew up to 120 days before maturity without a prepayment charge. Earlier than that, a charge can apply. A blend eight months out is not the 120-day renewal. TD also blends on a port when you need more money: the old balance keeps its rate, the extra funds take a current rate, and you get one blended rate. That moves a house. It does not reprice a mortgage you are staying in. RBC publishes the same port blend for a larger loan, and ordinary prepayment rules when the new loan is smaller. The port page is not a promise that every RBC borrower can blend in place.
CIBC's Alberta terms (April 2026) blend on a port only when the new loan is larger. More than 12 months left, the second rate is that day's similar fixed term. Twelve months or less, it is the 6-month fixed. The same size keeps the old rate. A Variable Flex mortgage is not ported at the old rate. Those terms do not describe an in-place blend for someone who is not selling. Ask for the formula, the fee, and the start date. Monolines and credit unions are outside these pages. The question is the same, and the published penalty methods are in the Big Five comparison and the lender-type guide.
When the blend is the right tool
Use it when you have to end the term and the blend is cheaper than the penalty plus the replacement loan. A sale you cannot port is the clean case. So is a divorce or a job transfer with a real closing date. Price the penalty from the lender's worksheet, not from a guess, and price the replacement rate from a written commitment. If the blend's extra interest over the new term is smaller than that penalty, the blend is doing a job.
Leave it when the old rate is below anything you can get today and nobody is forcing you to move. The worked example is that file: about $773 of extra interest to start the blend now, against a wait that keeps 3.19% for 24 months and only then pays 4.35%. The mortgage calculator will show the higher payment. It will not show the months you gave up unless you run both paths. The fixed versus variable guide is the next decision, after you have decided to be in a new term at all.
Sources
The 4.6% figure is FCAC's, reproduced so the steps can be checked. The second example uses a labelled 3.19% contract rate and the reported 5-year fixed median as the new-rate input. It is not a blend any bank has offered.
- FCAC, breaking your mortgage, including the five-step blend illustration.
- FCAC, blend-to-term and blend-and-extend. The amortization does not change.
- TD, early renewal from 120 days out and prepayment charges on an earlier renewal.
- RBC, porting and blending an increase.
- CIBC Alberta standard charge terms, port blends when the new loan is larger.
- FCAC, how a prepayment penalty is built, and CMHC on premiums if the balance grows.
A note on the paid guide
The explanation on this page is free. The $29 PDF is a separate guide we write and sell. You can use the calculators and the rate tables without buying it.
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Questions
Is the blended rate just the average of the two rates?
Only if the two pieces of time are equal. FCAC weights each rate by the months it covers. In its example, 24 months at 5.5% and 36 months at 4% produce 4.6%, not 4.75%. A lender can use a different weighting, or a present-value blend. Ask which one is on the worksheet.
Does a blend-and-extend avoid the prepayment penalty?
FCAC says you do not pay a prepayment penalty on this option, and that an administration fee is possible. TD says a renewal inside 120 days of maturity can avoid a charge, and that an earlier renewal may not. Get the fee in writing. A port that keeps the old rate on the same balance is a different way to avoid the charge, and it only applies when you are moving.
Will a blend lower my payment?
It lowers the payment when the new rate is below your contract rate. It raises the payment when the new rate is higher, which is the usual case for a mortgage signed at a low rate. On the labelled example, the blend payment is higher than the payment at 3.19% because the reported median used as the new rate is higher than 3.19%.
Does the blend change how many years I have left?
FCAC says no. The term changes. The amortization does not, unless you and the lender agree to stretch it as a separate change. Stretching the amortization lowers the payment and increases the interest. Price that change on its own line.
Can I blend and then switch lenders next year?
You can, and you will likely pay a penalty on the new term. The point of the blend was to avoid a penalty by staying. Leaving a year later spends the penalty you postponed, on a longer remaining term. If you already know you want a different lender, price the break today rather than blending first.
What if I need to borrow more at the same time?
That is a refinance, or a port increase, not a plain blend. The extra money is priced at a current rate. The stress test can apply. An insured increase can trigger a new premium, and the sales tax on that premium is cash in Ontario, Quebec, and Saskatchewan. A line of credit added in the same paperwork can turn the registration into a collateral charge.
Are the rates in the worked example today's bank rates?
The 3.19% is a labelled example of an older contract. The new-rate input is the rounded 5-year fixed median self-reported by Canadian borrowers online, not a special from a bank's website and not a blend quote. FCAC's 5.5% and 4% are FCAC's teaching numbers. Your lender's two inputs will be different.