Canadian Mortgage Calculator Guide
The Canadian Mortgage Calculator incorporates Canadian banking conventions, notably the semi-annual compounding of fixed-rate mortgage interest required by the Canadian Interest Act, tiered down payment thresholds, and CMHC mortgage default insurance frameworks.
1. Semi-Annual Compounding in Canada
Under Section 6 of the Canadian Interest Act, interest on fixed-rate residential mortgages in Canada is compounded semi-annually, not in advance. This differs fundamentally from US mortgages which compound monthly.
Because semi-annual compounding compounds only twice a year rather than 12 times, the monthly rate and resulting payment are marginally lower than on an equivalent US loan.
2. Canadian Minimum Down Payment Requirements
In Canada, the minimum allowable down payment depends on the total purchase price of the property:
| Purchase Price Tier | Minimum Down Payment |
|---|---|
| $500,000 or less | 5% of purchase price |
| $500,001 to $1,500,000 | 5% on first $500,000 + 10% on remainder |
| $1,500,000 or more | 20% of purchase price (conventional mortgage) |
3. CMHC Mortgage Default Insurance
When the down payment is less than 20% of the purchase price, Canadian regulations require mortgage default insurance (often provided by CMHC, Sagen, or Canada Guaranty). Insurance premiums are calculated as a percentage of the total loan and are rolled into the mortgage principal:
- 5.00% to 9.99% Down Payment: 4.00% premium
- 10.00% to 14.99% Down Payment: 3.10% premium
- 15.00% to 19.99% Down Payment: 2.80% premium
- 20.00% or greater: No mortgage default insurance required
4. Mortgage Term vs. Amortization Period
In Canada, the amortization period is the total duration required to pay off the mortgage entirely (standard is 25 years). The mortgage term is the length of time your mortgage agreement, interest rate, and terms remain in effect (most commonly 3 or 5 years). At the expiration of each term, borrowers renew their mortgage at prevailing interest rates.