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Canadian mortgage calculator

Canadian mortgage stress-test calculator

Compare a contract-rate payment with the qualifying rate and see the difference in estimated mortgage capacity.

Private inputs · Transparent assumptions

Your decision ledger

Stress test

Change the assumptions below. Your inputs and results remain in this browser and are not sent to RateReset.

  1. 01Facts
  2. 02Change
  3. 03Compare

Enter your values to see results.

How to use this result

Start with the decision, then inspect the assumptions.

The mortgage stress test asks whether a borrower can support payments at a rate above the contract rate. This calculator keeps the threshold in one dated configuration so a policy update does not require formulas to be changed throughout the product.

How the calculation works

The qualifying rate is the greater of the configured minimum qualifying rate and the user-entered contract rate plus the configured buffer. The same monthly housing capacity is converted into principal at both rates.

For the full notation, rate conversion, rounding approach, and limitations, see the calculation methodology.

Worked Canadian example

Put the estimate in context

With CA$3,500 available for principal and interest, a 4.50% contract rate supports more principal than the 6.50% qualifying rate. The difference is a qualification effect, not an extra amount the borrower pays at the contract rate.

Before relying on it

Common mistakes

  1. 01Assuming qualification occurs at the advertised contract rate.
  2. 02Hardcoding a threshold without its effective and review dates.
  3. 03Ignoring property taxes, heating, condo fees, and other debts.
  4. 04Treating a stress-test result as mortgage approval.

Clear answers

Frequently asked questions

What rate does the calculator use?

It uses the greater of the configured benchmark and the contract rate plus the configured buffer. The assumptions panel identifies the version and review date.

Does passing guarantee approval?

No. Lenders assess income, debts, credit, property, mortgage type, and documentation.

Continue comparing

Related calculators

AffordabilityEstimate a maximum mortgage and purchase price using visible GDS, TDS, and stress-test assumptions.Mortgage paymentCalculate a Canadian mortgage payment, term interest, principal repaid, and an optional monthly ownership budget.Rent vs buyCompare estimated housing cash flow and net worth under user-defined renting and buying assumptions.

Official references

Sources used

Full source registry

Estimates are for educational purposes and may differ from lender calculations, contractual terms, taxes, fees, or regulatory requirements. Read the full disclaimer.

Last reviewed July 26, 2026. Content is marked for financial and compliance editorial review before material policy changes are published.