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Canadian mortgage calculator

Canadian mortgage affordability calculator

Estimate a maximum mortgage and purchase price using visible GDS, TDS, and stress-test assumptions.

Private inputs · Transparent assumptions

Your decision ledger

Affordability

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.

Affordability is a qualification estimate, not a spending target. Canadian lenders compare shelter costs with gross income through the gross debt service ratio, then include other debts through the total debt service ratio. Your own comfortable budget may be lower.

How the calculation works

The calculator applies editable planning limits of 39% GDS and 44% TDS, includes half of condo fees, and qualifies the mortgage at the greater of 5.25% or the contract rate plus two percentage points.

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

Worked Canadian example

Put the estimate in context

For CA$130,000 of annual household income, CA$500 of monthly debt payments, CA$450 of property tax and CA$150 of heating, the TDS limit may constrain the mortgage before the GDS limit does. Adding a CA$100,000 down payment converts the mortgage capacity into an indicative purchase price.

Before relying on it

Common mistakes

  1. 01Using net income instead of gross income.
  2. 02Leaving out car loans, lines of credit, or condo fees.
  3. 03Treating the regulatory maximum ratio as a comfortable personal budget.
  4. 04Assuming an estimate guarantees lender approval.

Clear answers

Frequently asked questions

What are GDS and TDS?

GDS compares housing costs with gross income. TDS adds recurring debt payments. Lenders also consider credit, property, documentation, and their own policies.

Is the down payment included?

Yes. It is added to the estimated maximum mortgage to show an indicative purchase price before closing costs.

Continue comparing

Related calculators

Stress testCompare a contract-rate payment with the qualifying rate and see the difference in estimated mortgage capacity.Mortgage paymentCalculate a Canadian mortgage payment, term interest, principal repaid, and an optional monthly ownership budget.Closing costsEstimate transfer tax, legal costs, title insurance, inspection, appraisal, adjustments, moving, and mortgage insurance.

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.