Mortgages the Canadian Way Core

Almost everything written online about mortgages is American. The Canadian system works differently in one structural way that determines how much risk you are actually carrying.

Term vs amortization — the distinction that defines Canadian housing

Two numbers describe every Canadian mortgage, and conflating them is the source of most confusion:

• Amortization — the total time to pay the loan off completely. Typically 25 years, sometimes 30 for uninsured mortgages.
• Term — the length of your current contract with the lender, at the current rate. Typically 5 years, though 1 to 10 are available.

So a standard Canadian mortgage is a 5-year term inside a 25-year amortization. When the term ends, the remaining balance does not come due — but the contract does. You renew, at whatever rates exist on that day, five or six more times over the life of the loan.

Fixed vs variable, and the stress test

Within a term you choose fixed (the rate is locked for the term) or variable (the rate moves with your lender's prime rate, which follows the Bank of Canada's policy rate).

Historically, variable has cost less on average, because you are being paid a small premium for accepting uncertainty. But "on average" conceals the risk: variable-rate borrowers in 2022 and 2023 experienced some of the fastest payment increases in Canadian history. Some variable products have fixed payments where a rate rise silently increases the interest portion — and in extreme cases the payment stops covering the interest at all, a state called negative amortization, where the balance grows.

Every borrower must also pass the mortgage stress test. You must qualify at the greater of your contract rate plus 2%, or 5.25% — not at the rate you will actually pay. A borrower offered 4.5% must prove they could afford 6.5%. It reduces how much you can borrow and is frequently resented, but it is the reason Canadian mortgage delinquency rates stayed low through a sharp rate cycle.

Insured vs uninsured, and what CMHC actually does

A down payment below 20% of the purchase price makes the mortgage high-ratio and requires mortgage default insurance, from CMHC or a private insurer.

The most misunderstood fact in Canadian home buying: this insurance protects the lender, not you. You pay the premium; the lender is the beneficiary. If you default, the insurer pays the lender and then pursues you for the shortfall.

The premium is normally added to the mortgage balance, so you borrow it and pay interest on it for the full amortization. A $19,000 premium financed at 4.5% over 25 years costs well over $30,000 in total. In most provinces provincial sales tax on the premium must also be paid in cash at closing.

There is a genuine counter-argument, though. Waiting three years to save from 10% to 20% in a rising market can cost more in price appreciation than the premium would have. There is no universally correct answer — but the premium is a real, quantifiable cost that should appear in the comparison rather than being waved away.

Renewal risk and payment shock

Renewal risk stopped being theoretical in Canada. Buyers who locked in near-record-low rates around 2020 and 2021 renewed into a materially higher rate environment, and the payment increases were substantial.

The defences are unglamorous and effective. Stress-test yourself beyond the regulatory requirement: if the payment at contract rate plus 3% would be unaffordable, borrow less. Use the term structure deliberately — a 5-year fixed pushes the risk further out and is why most Canadians choose it. And when rates are low, use prepayment privileges rather than upgrading your lifestyle, because principal repaid at a low rate is principal you never renew at a high one.

Prepayment privileges

Most Canadian mortgages allow, each year without penalty:

• A lump-sum prepayment of 10% to 20% of the original principal.
• A payment increase of 10% to 20% above the scheduled amount.
• Switching to accelerated bi-weekly payments — half the monthly payment every two weeks, which produces 26 half-payments a year, equal to 13 monthly payments instead of 12.

That last one is nearly free and quietly powerful: the extra payment goes entirely to principal and typically shortens a 25-year amortization by around three years. Because every prepaid dollar goes straight to principal, prepayments made early are worth far more than the same dollars later — the diagram above shows why.

Rent vs buy, presented honestly

A common rule of thumb is the 5% rule: multiply the property value by 5% and divide by 12 to estimate the monthly unrecoverable cost of owning. If that exceeds the rent on a comparable place, renting is cheaper on a pure cash-flow basis.

The rule's honest limitations, which the people quoting it usually skip:

• The 3% cost-of-capital component was calibrated in a low-rate era. With mortgage rates near 4.5%, the true figure is higher, which shifts the rule further toward renting than most versions admit.
• It ignores price appreciation entirely — in either direction. It is a cost comparison, not a wealth comparison.
• It ignores the forced-saving effect, which is not trivial. A mortgage payment compels principal repayment every month; a renter must voluntarily invest the difference, and most do not. Owning has historically built wealth for many Canadians partly because it removes the choice.
• It ignores security of tenure, the ability to renovate, and the risk of eviction — real values that do not appear in any spreadsheet.
• Canadian principal residences are exempt from capital gains tax on sale, a significant advantage no rule of thumb captures.

The defensible conclusion: renting is not throwing money away, and buying is not automatically an investment. Both are ways of paying for shelter, with different cost structures and different risks. Run the actual numbers for your actual city, and count the forced-saving effect honestly — including whether you would genuinely invest the difference.

Common questions

What is the difference between a mortgage term and amortization in Canada?

The amortization is the total time to repay the loan — usually 25 years. The term is the length of your current contract at the current rate — usually 5 years. At the end of each term you renew at whatever rates then exist, which is why Canadians face renewal risk that Americans with a 30-year fixed mortgage do not.

Do I have to pay CMHC insurance?

Only if your down payment is less than 20% of the purchase price. The premium ranges from 2.80% to 4.00% of the loan depending on how much you put down, is normally added to the mortgage balance so you pay interest on it for the full amortization, and it insures the lender against your default — not you. In most provinces the sales tax on the premium must be paid in cash at closing.

Is it better to rent or buy in Canada?

Neither is automatically better. The 5% rule estimates the unrecoverable monthly cost of owning as 5% of the property value divided by twelve — roughly 1% property tax, 1% maintenance and 3% cost of capital. Compare that to rent on a similar place. But the rule ignores price changes, the tax-free gain on a principal residence, and the forced-saving effect of a mortgage, which is a genuine advantage for people who would not otherwise invest the difference.