MortgageMasher takes the complexity out of Canadian mortgage math. Enter your home price, down payment, and interest rate and instantly see your complete mortgage picture — including CMHC insurance if your down payment is under 20%, and a side-by-side comparison of different amortization periods.
No sign-up. No data stored. All calculations run instantly in your browser using correct Canadian mortgage formulas — including semi-annual compounding as required by the Bank Act of Canada.
Semi-annual compounding — Canadian mortgages compound interest semi-annually, not monthly like US mortgages. Our calculator uses the correct formula as governed by the Interest Act of Canada.
CMHC insurance — If your down payment is less than 20%, CMHC mortgage insurance is mandatory in Canada. We automatically calculate your premium at the correct 2026 rates and show exactly how it affects your total cost.
Amortization limits — Insured mortgages (under 20% down) are capped at 25 years. Our calculator enforces this rule automatically.
MortgageMasher is a Sharpline utility tool. Sharpline builds clean, focused financial web tools designed to give Canadians fast, accurate answers without the clutter. All Sharpline tools are free to use and supported by advertising.
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