Fixed scenario
The fixed rate and calculated monthly payment remain unchanged through the selected term.
Rate-risk comparison
Variable vs Fixed Mortgage Calculator Canada
Compare a fixed mortgage with your own annual variable-rate path, including changing-payment and fixed-payment variable structures, term interest, principal, payment range, and balance at renewal.
User-defined rate pathVariable or fixed-payment VRMTrigger-rate estimateNegative amortization warning
Calculation inputs
Compare fixed certainty with a variable-rate path
Enter your own annual variable-rate scenario and compare payment behavior, term interest, principal reduction, and renewal balance.
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Variable-rate path by mortgage year
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How the calculation works
Understand the formula before relying on the result
Variable rate path
Each entered annual variable rate applies for one mortgage year. The path is a scenario supplied by the user, not a rate forecast.
Payment structures
Variable-payment mode recalculates payment when the annual rate changes. Fixed-payment mode keeps the initial payment and shifts the principal portion.
Trigger and negative amortization
When fixed payment no longer covers interest, principal becomes negative and the balance can grow. The calculator flags that condition.
Interpret the result
Lowest initial payment is not the decision
Term interest, payment volatility, balance at renewal, penalty, flexibility, and personal risk tolerance all matter.
A rate path should include downside
Testing only declining rates understates risk; a useful comparison includes at least one adverse scenario.
Fixed payment does not mean fixed economics
The cash payment may stay stable while amortization extends and renewal balance increases.
Term result is not lifetime result
Both options normally renew, so future rates and balances continue to affect total ownership cost.
Common mistakes
- Treating today's rate spread as the full comparison.
- Using a single expected variable rate for all years.
- Ignoring fixed-payment variable negative amortization.
- Comparing products with different penalties and privileges as if identical.
- Choosing based on forecasts without considering budget tolerance.
What lenders review
- Product type and whether payments change with prime.
- Discount or premium relative to lender prime.
- Trigger-rate and trigger-point provisions.
- Conversion rights, penalties, portability, and prepayment privileges.
- Qualification rate and borrower capacity under higher payments.
Planning tips
- Run falling, stable, and rising variable-rate paths.
- Budget using the highest modeled payment, not the first payment.
- Compare balance at term alongside interest.
- Review the penalty formula if a move or refinance is possible.
- Choose the risk profile that remains sustainable if the forecast is wrong.
Connected HopeWell knowledge
Connect the variable vs fixed calculator to the mortgage decision
Use the result alongside HopeWell's guide chapters, glossary definitions, real underwriting case studies, service pages, and related calculators.
Calculation pathway
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Continue into qualification, purchase costs, equity, refinancing, HELOC planning, and mortgage comparison using the connected calculators below.
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Frequently asked questions
Questions about this calculation
Does the Bank of Canada set variable mortgage rates?
The policy rate influences lender funding and prime rates, but each lender sets its own prime rate and mortgage pricing.
What is a fixed-payment variable mortgage?
The payment initially stays constant while the interest and principal shares change as rates move. Some products can reach trigger conditions.
What is the trigger rate?
It is approximately the rate at which the scheduled payment is consumed by interest, leaving no regular principal reduction.
Can a variable mortgage balance increase?
Yes. In a fixed-payment structure, sufficiently high rates can cause negative amortization depending on product terms.
Does the calculator predict rates?
No. The user supplies the rate path so multiple scenarios can be tested.