Mortgage Renewal Calculator (Canada)
Compare your renewal offer against a switch to a new lender and see the real cost difference after rate changes, penalties, discharge fees, appraisal costs, legal costs, cashback clawbacks, and other switching friction. This page is built to answer the decision question clearly: is it smarter to accept the bank’s offer, negotiate harder, or move the mortgage elsewhere?
See the Canadian renewal formula, model boundaries and official sources Closed by default. Open for the exact calculation sequence and limits. Method v4.1
Calculation sequence
- Convert each quoted annual rate to its payment-period rate using Canadian semi-annual compounding.
- Calculate the scheduled payment and simulate principal and interest through the selected term.
- Add stay-side retention loss to the stay path and net switching friction to the switch path.
- Subtract switch cost from stay cost. A positive result means switching is cheaper over the term.
- Use the payment difference to estimate how many months it takes to recover switching friction.
i = (1 + j / 2)^(2 / m) - 1
Payment = B × i(1 + i)^n / ((1 + i)^n - 1)
Net advantage = Stay cost - Switch cost
Included and excluded
Included: scheduled principal and interest, selected payment frequency, penalty, discharge, legal, appraisal, other costs, stay-side loss, new-lender incentive, decision buffer, and break-even timing.
Excluded: approval probability, credit score, property taxes, insurance, variable-rate changes during the term, collateral-charge complexity, product-feature value, blend-and-extend math, and any fee not entered by the user.
Important limitation: this is a planning comparison using constant rates over the selected term. Your lender’s exact payment can differ because of contract-specific rounding, timing, compounding disclosure, or product rules.
What the default comparison proves before you calculate
The example uses the same values already loaded into the form. It is static, crawlable, and independently checked against the model.
The decision buffer changes the strength label, not the underlying dollar difference.
Build the decision from quotes and costs you can verify
Use the actual renewal offer, a competing quote that applies to your file, and every switching cost that will not be covered. The result separates headline-rate savings from the friction required to obtain them.
Renewal inputs
The decision buffer affects the verdict strength only. It never changes the calculated savings.
Where the renewal advantage is created or lost
Trace the rate benefit, each switching cost, both term totals, the decision buffer, and the recovery point.
| Component | Amount | Decision note |
|---|
Two visual checks the table cannot show as quickly
One chart compares the complete term outcomes; the other tests whether raw rate savings are large enough to absorb switching friction.
Which option actually costs less?
Lower is better. Both bars use the same scale and include the relevant path costs.
The lower complete term cost is the decision winner.
Does the rate advantage survive the friction?
Raw interest savings must exceed net switching friction before the switch creates value.
The gap between these bars is the surviving rate advantage.
How to use the comparison without fooling yourself
Accuracy depends more on quote quality and complete switching costs than on entering many assumptions.
Start at the renewal date
Enter the balance expected at renewal, the remaining amortization, and one term used for both paths.
Use quotes, not advertisements
Add your written renewal offer and a competing rate that is genuinely available to your mortgage profile.
Price every switch step
Include penalty, discharge, legal, appraisal, setup, administration, and any uncovered product friction.
Read the net decision first
Use the killer number and recovery runway before comparing payment amounts or headline rates.
If payment frequency is part of your negotiation, compare monthly, bi-weekly, and accelerated bi-weekly outcomes with the Bi-Weekly vs Monthly Mortgage Calculator Canada before treating a different schedule as automatic savings.
What your renewal result actually means
The verdict is intentionally stricter than a simple positive-versus-negative dollar test.
If switching wins clearly
The lower rate recovers its switching friction early enough and leaves savings above your decision buffer. That makes the competing quote useful both as a switch option and as negotiation leverage.
If the result is marginal
The math may favour switching, but the advantage is sensitive to one missed fee, a weaker final quote, or a lender incentive that is not fully usable.
If staying wins
The rate gap is too small, the term is too short, or switching friction is too heavy. A lower advertised rate is not enough to create a better renewal outcome.
How to choose between accepting, negotiating, and switching
Treat the competing offer as evidence. The best action depends on how much of the advantage survives verification.
Accept only after testing the offer
Staying can be rational when the switch cannot recover its friction. It does not prove the first renewal letter is competitive, so use the competing quote to negotiate before signing.
Switch only on the final numbers
Confirm the payout statement, uncovered transfer costs, property eligibility, rate hold, and lender incentive in writing. Recalculate if any number changes.
If the result is close, isolate the recovery question with the Mortgage Break-Even Calculator Canada. If the renewed payment is close to your limit, stress-test the payment before treating either offer as comfortable.
Three renewal scenarios that look similar but end differently
The rate gap alone cannot separate these cases. Balance, term, friction, and recovery timing do.
Lower rate, expensive move
A borrower sees a clear rate discount, but discharge, legal work, and an early-break penalty consume most of the interest savings. Staying and negotiating is stronger than moving for a thin gain.
Moderate gap, large balance
The competing rate is only modestly lower, but the remaining balance is large and the lender covers most transfer costs. The switch produces meaningful savings over a five-year term.
Math wins, margin does not
Switching is cheaper on paper, but only by a small amount after the decision buffer. One revised fee can flip the result, so the borrower uses the quote to negotiate instead.
Common mistakes that manufacture fake renewal savings
Each mistake creates a number that looks precise while omitting part of the real decision.
- Comparing rates instead of term costs.A smaller percentage does not reveal how much interest is actually saved.
- Leaving switching costs at zero without proof.FCAC specifically flags setup, discharge, registration, transfer, appraisal, and administration costs.
- Mixing different amortizations.A lower payment created by extending amortization is not the same decision as a straight switch.
- Treating an advertised rate as an approved quote.Property type, insurance status, loan-to-value, and borrower profile can change availability.
How the Canadian renewal calculation works
The model compares identical balances, amortization, term, and payment frequency so the lender path is the meaningful difference.
Convert the quoted rate
The annual rate is converted to the selected payment-period rate using semi-annual compounding, then used to calculate scheduled payments.
Simulate each term
Every scheduled payment is split into interest and principal until the selected term ends or the balance reaches zero.
Apply path-specific friction
Stay-side loss is added only to staying. Penalty and transfer costs are added only to switching, then reduced by the new lender incentive.
Test the surviving advantage
The complete term costs determine the dollar winner. The decision buffer and break-even timing determine whether that win is strong or fragile.
Mortgage renewal calculator Canada: should you accept your bank’s offer or switch lenders?
The renewal letter is a starting point, not proof that staying is cheaper.
Mortgage renewal is one of the easiest moments to lose money quietly. Many borrowers compare a renewal offer with a headline market rate and assume the lower rate must be better. The real question is different: which option costs less after the complete switching process is included?
A lower rate can still lose when the remaining balance is small, the new term is short, or switching costs are heavy. A modest rate improvement can create a real advantage when the balance remains large and the new lender covers legal or transfer costs. That is why the same rate gap can produce different decisions for two borrowers.
FCAC advises borrowers to identify setup, discharge, registration, transfer, appraisal, and administration costs and to ask whether the new lender will cover them. It also recommends using competing offers when negotiating with the current lender. Those steps are built directly into this comparison rather than left as generic advice.
The strongest choice is the one that remains clearly better after every quote and cost is verified. If the switch only wins before friction, it is not a real win. If it still wins after friction and recovers those costs early in the term, the result becomes useful evidence for either moving or negotiating harder.
Questions that change the renewal decision
No. The lower rate only wins if it offsets all switching friction and still creates meaningful net savings.
Common ones include prepayment penalty, discharge fee, legal cost, appraisal or setup cost, administration fees, and any incentive that is not actually available to offset them.
A meaningful term-cost advantage, manageable switching friction, and a short enough break-even period relative to the selected term make the switch more compelling.
That is often not a strong practical win. Small mathematical savings can disappear if the quote changes, the friction is underestimated, or the execution becomes more expensive.