Understanding Canadian mortgage rules and costs
Canadian home financing has distinctive rules on terms, insurance and the stress test. The table summarizes the main items verified against OSFI, CMHC and provincial practice.
| Rule / cost | How it works in Canada |
|---|---|
| Term vs amortization | Term is the rate contract (often 5 years); amortization is the full repayment period (commonly 25 years) |
| Minimum down payment | 5% on the portion of price up to a set limit; 20% avoids default insurance |
| Mortgage default insurance | Required below 20% down (e.g. CMHC); protects the lender and is added to the loan |
| Stress test qualifying rate | Greater of contract rate + 2 percentage points or the minimum qualifying rate floor |
| Land transfer tax | Provincial tax on purchase; some municipalities (e.g. Toronto) add a separate LTT, with first-time buyer rebates |
- The mortgage stress test, overseen by the Office of the Superintendent of Financial Institutions (OSFI), requires lenders to qualify borrowers at the greater of their contract rate plus two percentage points or a minimum qualifying rate floor — so approval is based on a higher rate than the one actually paid.
- Mortgage default insurance is mandatory when the down payment is under 20%; the premium is typically added to the loan balance. The maximum insurable home price and the availability of 30-year amortization for certain buyers are set by federal policy.
- Land transfer taxes are levied provincially, and some cities such as Toronto add a municipal land transfer tax; first-time buyer rebates may reduce or eliminate the tax up to a limit. Confirm current rates with the province and municipality.
- Canadian fixed mortgages compound semi-annually by law; this calculator's monthly-compounding result is a close, comparable approximation rather than a lender's exact figure.
What is a Canadian mortgage calculator?
A Canadian mortgage calculator applies the standard amortization formula to find the regular payment that repays a home loan over its amortization period. Canadian mortgages separate two time horizons: the term, which is the length of the current interest-rate contract (the 5-year term is the most common), and the amortization period, which is the total time to fully repay the loan and has historically been 25 years for insured borrowers.
The calculator derives the loan from the home price minus the down payment. In Canada the minimum down payment is 5% on the portion of a home price up to a set limit, with more required above it. A down payment below 20% requires mortgage default insurance — commonly called CMHC insurance after the Canada Mortgage and Housing Corporation — which protects the lender and is added to the loan.
Because the term is shorter than the amortization, Canadian borrowers renew their mortgage several times over the life of the loan, each time at a new rate. Federal rules also require a mortgage stress test: lenders qualify borrowers at the greater of the contract rate plus two percentage points or a minimum qualifying rate floor. This calculator models a single rate over the full amortization for comparison.
How to use this Canadian mortgage calculator
- Enter the home price and your down payment in Canadian dollars. The calculator derives the loan as price minus down payment.
- Enter the annual interest rate for your term. Remember this rate is contracted only for the term (often 5 years), after which you renew at a new rate.
- Enter the amortization period in years. The common amortization is 25 years, with 30 years available to some first-time buyers and buyers of newly built homes.
- Read the regular payment, the total paid and the total interest, assuming the entered rate applied for the whole amortization.
- Budget separately for provincial (and, in some cities, municipal) land transfer taxes, plus CMHC or other default insurance if your down payment is under 20%.
The amortization formula
The regular payment M is derived from the present-value annuity formula, setting the present value of all future payments equal to the loan principal P. The monthly rate r is the annual rate divided by 12; n is the number of monthly payments (amortization years times 12). Canadian fixed-rate mortgages are legally compounded semi-annually rather than monthly, so a lender's exact payment can differ slightly; this calculator uses monthly compounding for a consistent comparison across countries.
Common mistakes
- Confusing the term with the amortization — the 5-year term is only the rate contract, not the time to repay the whole loan.
- Qualifying to the contract rate only and ignoring the stress test, which uses a higher qualifying rate.
- Forgetting land transfer tax, including a separate municipal LTT in cities like Toronto.
- Assuming a down payment under 20% avoids extra cost; it requires mortgage default insurance added to the loan.
- Overlooking renewal risk — the rate can change each time the term ends and the mortgage is renewed.
Perguntas frequentes
How does the Canadian mortgage stress test work?
The Canadian mortgage stress test requires federally regulated lenders to qualify borrowers at the greater of their contracted interest rate plus two percentage points or a minimum qualifying rate floor set by the Office of the Superintendent of Financial Institutions (OSFI). This means a borrower must show they could still afford payments at a rate higher than the one they will actually pay, which limits the maximum loan size. The test applies to both insured and uninsured mortgages at federally regulated lenders.
What is the difference between a mortgage term and amortization in Canada?
In Canada, the term is the length of time your current interest rate and mortgage contract are in effect — the 5-year term is the most common — while the amortization is the total time needed to repay the entire loan, historically 25 years. Because the term is shorter than the amortization, borrowers renew their mortgage several times, each renewal at whatever rate is available then. Planning must account for this renewal risk.
When is CMHC mortgage insurance required?
Mortgage default insurance, commonly called CMHC insurance after the Canada Mortgage and Housing Corporation, is required when a Canadian buyer's down payment is less than 20% of the home price. It protects the lender if the borrower defaults, and the premium is usually added to the mortgage balance. Insurance is available only up to a maximum insurable home price set by federal policy, and other insurers (Sagen and Canada Guaranty) also provide it.
What is the minimum down payment in Canada?
The minimum down payment in Canada is 5% on the portion of a home's price up to a federally set limit, with a higher percentage required on the portion above that limit, and 20% or more for homes above the insurable maximum. A down payment below 20% requires mortgage default insurance. Larger down payments reduce the loan, the insurance premium and total interest paid.
What is land transfer tax in Canada?
Land transfer tax is a tax buyers pay when property ownership is transferred, levied by the province and, in some cities such as Toronto, by the municipality as an additional charge. Rates are tiered by purchase price, and first-time buyers may qualify for a rebate that reduces or eliminates the tax up to a limit. Because it is a significant upfront cash cost separate from the down payment, buyers should confirm the current provincial and municipal rates.
What benchmark do Canadian mortgage rates track?
Canadian variable mortgage rates move with lenders' prime rates, which follow the Bank of Canada's policy interest rate. Fixed mortgage rates are priced off Government of Canada bond yields for the equivalent term rather than the policy rate directly. When the Bank of Canada changes its policy rate, variable-rate payments typically adjust. Calculate.Studio shows the current Bank of Canada policy rate separately with its verification date.
Referências
- Office of the Superintendent of Financial Institutions (OSFI). Minimum qualifying rate for uninsured mortgages (stress test). osfi-bsif.gc.ca.
- Canada Mortgage and Housing Corporation (CMHC). Mortgage loan insurance and down payment rules. cmhc-schl.gc.ca.
- Bank of Canada. Policy interest rate and monetary policy. bankofcanada.ca.
- Financial Consumer Agency of Canada (FCAC). Mortgages: terms, amortization and renewal. canada.ca.
- City of Toronto / provincial revenue authorities. Land transfer tax and first-time buyer rebates. toronto.ca; ontario.ca.