By Travis Bannert, Realtor and Mortgage Broker
Payment shock is the jump in your monthly mortgage payment when you renew at a higher rate than the one you have now. You do not need to wait for your lender’s letter to size it up: take your current balance and remaining amortization, run the payment at a rate 1, 2 and 3 points above today’s, and you will know within a few dollars what is coming — and how much room you have to do something about it. This post walks through that worksheet with one fully worked example.
Why renewal payments are rising now
Many Edmonton mortgages renewing in late 2026 and through 2027 were taken or last renewed when rates were lower, so even a well-priced new term can land well above the old payment. The direction of rates is also no longer one-way: Bank of Canada, October 28, 2026: the policy rate was raised from 2.25% to 2.50%, and big-bank prime moved from 4.45% to 4.70% effective October 29, 2026. The Bank’s next decision is December 9, 2026 — inside the early-renewal window for anyone maturing in the first months of 2027. None of that tells you what your renewal quote will be; it tells you guessing is not a plan.
The worksheet: your numbers in four steps
Step 1: Find your balance at maturity — not today’s balance. Your lender’s app or annual statement projects it; that is the amount being renewed.
Step 2: Find your remaining amortization at maturity. If you renew into the same amortization, payments follow the schedule you are already on.
Step 3: Run the payment at three rates: your current rate, your current rate plus 1 point, and plus 2 points. Any mortgage calculator does this — or use the Mortgage Renewal Check at https://nextdoormortgages.com/mortgage-renewal-check/ and compare the scenarios side by side.
Step 4: Subtract your current payment from each scenario. That difference, times 12, is the annual budget decision you are actually making — and it is the number to shop against, because on a large balance, a quarter-point difference in the renewal rate is worth real money every month for five years.
One worked example (illustrative rates only)
The rates below are round-number examples to show the size of the effect — they are not quoted market rates. Balance at renewal: $400,000. Remaining amortization: 20 years. Canadian mortgage, semi-annual compounding.
At 2.50%: $2,117 per month
At 3.50%: $2,315 per month — about $198 more
At 4.50%: $2,522 per month — about $405 more than the 2.50% scenario
At 5.50%: $2,738 per month — about $621 more
Read it this way: on this balance and amortization, each full percentage point of rate adds roughly $200 a month. On a $200,000 balance it is roughly half that; on $600,000, roughly half again more. Run your own balance through the same three scenarios and the shock stops being a surprise.
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Your options when the number is bigger than your budget
Extend the amortization. If you qualify, stretching back out (for example to 25 or 30 years) lowers the payment at the cost of more interest over time. It is a legitimate shock absorber when cash flow is the problem.
Shop the renewal. Your current lender’s first offer is a starting point. A switch to a new lender at maturity is normally penalty-free, and for insured mortgages a straight switch can often be done without re-passing the stress test — our complete renewal guide on this site explains the exemption. Even a quarter point matters at the sizes above.
Use prepayment room before maturity. Lump sums made during your current term reduce the balance being renewed, which reduces every scenario in the worksheet.
Reconsider the term length. A shorter or longer term changes both the rate offered and how soon you face this exercise again. There is no universally right answer — there is a right answer for your plans.
Do nothing is also a choice — a bad one. If you let a mortgage auto-renew or drift onto a short open term by default, you pay for convenience. Decide on purpose instead.
Start 120 days out, not 12 days
Lenders typically open early renewal about 120 days before maturity, and that window is when all of the options above are still available. Bank of Canada, October 28, 2026 context matters here: with the next decision on December 9, 2026, borrowers maturing early in 2027 will see at least one more rate announcement inside their window — another reason to have your worksheet done before offers start arriving. Bring your balance, your remaining amortization and your current rate to the Mortgage Renewal Check: https://nextdoormortgages.com/mortgage-renewal-check/ — or call 780-720-8240 and we will run the three scenarios on your real numbers together.
Frequently asked questions
What is mortgage payment shock at renewal?
It is the increase in your monthly payment when you renew at a higher rate than your current term. On a $400,000 balance with 20 years of amortization remaining, each additional percentage point of rate adds roughly $200 a month (illustrative example, semi-annual compounding).
How can I calculate my renewal payment before my lender contacts me?
Take your projected balance at maturity and your remaining amortization, then calculate the payment at your current rate, plus 1 point, and plus 2 points. Comparing those three numbers tells you the size of the decision and how much a better rate is worth.
Can I extend my amortization at renewal to lower the payment?
Often, yes, if you qualify — extending to a longer amortization lowers the monthly payment but increases total interest over the life of the mortgage. It is one of the standard tools for absorbing payment shock, and a broker can show you both the monthly and lifetime cost.
Does switching lenders at renewal mean passing the stress test again?
Not always. Since November 21, 2024, insured borrowers doing a straight switch to a new lender at renewal — same balance, same amortization — are exempt from the federal stress test. Uninsured and more complex changes are assessed case by case.
Want me to walk you through it? Call 780-720-8240 or use the Mortgage Renewal Check and I will call you.