Canadian Mortgage Calculator — Semi-Annual Compounding & CMHC Insurance
Canadian mortgage calculator with legally-correct semi-annual compounding, CMHC insurance premiums, and accelerated bi-weekly payment comparison. Get the right numbers for Canada.
Canadian Mortgage
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The Formula
Canadian fixed-rate mortgages are compounded semi-annually not in advance by law (Interest Act, Section 6). This differs fundamentally from US mortgages (monthly compounding), making US calculators inaccurate for Canadian mortgages. The B-20 stress test determines how much you can borrow (you qualify at the higher rate but pay the lower contract rate). Land Transfer Tax is a provincial/municipal progressive-bracket closing cost.
Variable Definitions
Stated Annual Rate
The advertised mortgage rate (e.g. 5.25%).
Effective Annual Rate
True annualized rate after semi-annual compounding.
Payments Per Year
Monthly = 12, semi-monthly = 24, bi-weekly = 26.
CMHC Insurance
Default insurance for <20% down (0.6%–4.0% of loan).
Loan-to-Value
Loan ÷ Property. >80% = insured mortgage.
Stress Test Rate
Qualifying rate = max(Contract + 2%, 5.25%).
Land Transfer Tax
Progressive provincial/municipal tax paid at closing.
How to Use This Calculator
- 1
Enter the property price and your down payment.
- 2
Select your province for a dynamic Land Transfer Tax estimate.
- 3
Pick an amortization period (max 25 years if <20% down).
- 4
Enter your quoted fixed interest rate.
- 5
Choose a payment frequency — compare Monthly vs Accelerated Bi-Weekly to see savings.
- 6
Toggle the Mortgage Stress Test to see your qualifying rate and max affordable price.
- 7
Review the Land Transfer Tax breakdown — a significant closing cost.
Common Applications
- Calculate monthly mortgage payments for a Canadian home including semi-annual compounding, land transfer tax, and provincial rules.
- Compare standard monthly payments versus accelerated bi-weekly payments to see how much interest and time you save over the amortization.
- Determine your maximum affordable home price under the Canadian mortgage stress test using the contract rate plus qualifying rate.
Canadian mortgages are compounded semi-annually (not monthly like the US), require a stress test to qualify, and may include costly Land Transfer Tax at closing
Understanding the Concept
Accelerated bi-weekly payments are the single biggest "free win" in Canadian mortgages. By paying half your monthly amount every two weeks, you make 26 half-payments = 13 full monthly payments per year — one extra principal-only payment. On a $500K mortgage at 5.25%, this saves 3–5 years and $30K–$60K+ in interest. The stress test determines how much you can borrow, not what you pay. Land Transfer Tax is a major closing cost (e.g., ~$11,500+ in Ontario on an $800K home) that first-time buyers often underestimate.
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