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Canadian semi-annual compounding — usecos
OSFI compliant · CMHC rules · Stress test
Methodology: OSFI B-20 · CMHC premium tables · Canadian semi-annual compounding
A mortgage calculator helps you estimate your monthly mortgage payments based on the home price, down payment, interest rate, and amortization period. It uses Canadian semi-annual compounding to give you accurate results.
Understanding your monthly payment is the first step to homeownership. This calculator also shows you CMHC insurance costs, the OSFI stress test impact, and how extra payments can save you thousands in interest.
I built this because bank mortgage calculators hide the math. They show you a number but not how they got there. Canadian mortgages use semi-annual compounding — not the simple monthly division US calculators use — and most free tools get this wrong.
This calculator uses the same formula OSFI-regulated lenders use: (1 + rate/200)^(2/12) − 1. Every line of the amortization schedule is visible. No black box. No data stored. Built by a Canadian developer who wanted a transparent alternative.
I built this because bank mortgage calculators hide the math. They show you a number but not how they got there. Canadian mortgages use semi-annual compounding — not the simple monthly division US calculators use — and most free tools get this wrong.
This calculator uses the same formula OSFI-regulated lenders use: (1 + rate/200)^(2/12) − 1. Every line of the amortization schedule is visible. No black box. No data stored. Built by a Canadian developer who wanted a transparent alternative.
Sources: OSFI Guideline B-20 · CMHC premium tables · FCAC mortgage guidelines
Monthly Payment
$0.00
25 year amortization
Judgment Grade
✅ Safe Buy
Affordable terms — your mortgage looks manageable
💡 You'll pay $297,925.98 in interest over the life of the mortgage
✅ Income required: $86,205.00/year (GDS 39%)
📊 First 5 years: 11.49% of payments build equity, rest is interest
LOAN
$400,000.00
INTEREST
$297,925.98
TOTAL COST
$697,925.98
DOWN PAYMENT
$100,000.00
Adjust Amortization
25 Years
Total Interest
$297,925.98
How much can you afford?
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