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Canadian mortgage guide

How Canadian mortgages differ from US mortgages.

Canadian mortgages are governed by different rules than their American counterparts, and two in particular have a significant mathematical impact on your payment: the compounding convention and CMHC mortgage default insurance. Using a US-style calculator for a Canadian mortgage will produce an incorrect payment , often by $5–$20 per month on a typical mortgage, and more on larger loans.

1. Semi-annual compounding: the Interest Act requirement

Under the Interest Act (R.S.C. 1985, c. I-15), Section 6, Canadian mortgage rates must be expressed as a nominal rate compounded no more frequently than semi-annually (twice per year). This is mandatory for residential mortgages in Canada, regardless of how the lender quotes the rate informally.

In the United States, mortgage rates are compounded monthly by convention. A 5.5% rate in Canada is not the same as a 5.5% rate in the US; they produce different monthly payments.

To calculate the correct Canadian monthly payment, the nominal semi-annually compounded rate must first be converted to an equivalent monthly rate:

For example, a quoted rate of 5.5%:

• Semi-annual rate = 5.5% ÷ 2 = 2.75% = 0.0275
• Monthly rate = (1 + 0.0275)^1/6 − 1 ≈ 0.4534% per month
• Effective annual rate ≈ 5.576% (higher than the nominal 5.5%)

If a US-style calculator were used, it would compute the monthly payment using 5.5% ÷ 12 = 0.4583% per month — slightly higher than the Canadian equivalent, producing a slightly inflated payment. On a C$600,000 mortgage the difference is roughly C$10–20/month.

2. CMHC Mortgage Default Insurance

The Canada Mortgage and Housing Corporation (CMHC)administers mandatory mortgage default insurance for high-ratio mortgages. Those with a down payment of less than 20% of the purchase price. Two private insurers (Sagen and Canada Guaranty) offer equivalent products.

The insurance protects the lender if the borrower defaults. Despite the borrower paying the premium, the beneficiary is the financial institution, though the insurance does allow lenders to offer lower rates on insured mortgages than they might otherwise provide for high-LTV loans.

CMHC premium rates (2024)

The premium is added to the mortgage principal and repaid over the full amortization period — it is not paid as a lump sum at closing (though PST is due at closing in provinces that charge it: Ontario, Quebec, Saskatchewan, Manitoba). Adding the premium to the mortgage means it also accrues interest, so the true cost of CMHC insurance is somewhat higher than the headline premium percentage.

Minimum down payment rules in Canada

• Homes priced up to C$500,000: Minimum down payment is 5% of the purchase price.
• Homes priced C$500,001–C$999,999: Minimum is 5% of the first C$500,000 plus 10% of the amount above C$500,000. For a C$750,000 home: (5% × C$500,000) + (10% × C$250,000) = C$25,000 + C$25,000 = C$50,000 minimum (6.67%).
• Homes priced C$1,000,000 or more: CMHC insurance is not available. A minimum 20% down payment is required.

Term vs. amortization: a distinctly Canadian concept

In the United States, a "30-year fixed mortgage" is exactly that: a single loan with a fixed rate for 30 years. In Canada, mortgages work differently: you choose both an amortization period(the total repayment schedule, typically 25–30 years) and a mortgage term (the period for which the rate is locked, typically 1–5 years).

At the end of each term, the outstanding balance is renewed , either with the same lender at the prevailing rate or with a new lender. Most Canadians renew every 5 years throughout their amortization period. This means your interest costs over the life of the mortgage depend not just on today’s rate but on all future renewal rates — an inherent uncertainty.

Common Canadian mortgage terms:

• 1-year fixed: Shortest commitment; higher risk if rates rise; useful if you expect rates to fall
• 3-year fixed: Medium commitment; popular in uncertain rate environments
• 5-year fixed: Most popular in Canada; balances predictability and flexibility
• Variable rate: Fluctuates with the Bank of Canada prime rate; typically starts lower but involves risk

Accelerated payment frequencies

One of the most effective ways to reduce your total mortgage cost in Canada is to choose an accelerated bi-weekly or accelerated weekly payment schedule.

An accelerated bi-weekly payment = monthly payment ÷ 2, paid every two weeks. Because there are 26 two-week periods in a year (not 24, as with semi-monthly), you effectively make one extra monthly payment per year. On a typical C$500,000 mortgage at 5.5% over 25 years, this can reduce your amortization by 3–4 years and save over C$60,000 in interest.

Regular bi-weekly (non-accelerated) = (Monthly payment × 12) ÷ 26. This produces the same annual total as monthly payments and does not accelerate payoff.

The First Home Savings Account (FHSA)

Introduced in 2023, the FHSA is a registered account that allows first-time home buyers to contribute up to C$8,000 per year (lifetime limit C$40,000). Contributions are tax-deductible (like an RRSP) and qualifying withdrawals are tax-free (like a TFSA). This makes the FHSA one of the most powerful savings vehicles available to Canadian first-time buyers.

The RRSP Home Buyers’ Plan (HBP) remains available alongside the FHSA: first-time buyers can withdraw up to C$35,000 from their RRSP tax-free (as of 2024), to be repaid over 15 years.

Land transfer tax and other closing costs

Unlike US closing costs, Canadian purchasers face land transfer tax (LTT): a one-time tax paid at closing. Most provinces charge LTT; Ontario and British Columbia have the highest rates (1.5–2%+ on higher-value properties). Toronto charges a second, municipal LTT on top of Ontario’s provincial LTT, making total LTT potentially 3.5–4% for Toronto buyers. First-time home buyers receive rebates in several provinces.

Additional closing costs include legal/notary fees (C$1,500–$3,000), home inspection ($400–$600), title insurance (~$300), and CMHC PST in applicable provinces. Budget 1.5%–4% of the purchase price for total closing costs beyond the down payment.

Worked example

Purchase price: C$650,000. Down payment: 10% = C$65,000. Rate: 5.5%(nominal, semi-annually compounded). Amortization: 25 years. Term: 5 years.

• Mortgage before CMHC: C$585,000
• CMHC premium (10% down = 3.10% rate): C$585,000 × 3.10% = C$18,135
• Total insured mortgage: C$585,000 + C$18,135 = C$603,135
• Effective monthly rate: (1 + 0.0275)^1/6 − 1 ≈ 0.4534% per month
• Monthly payment ≈ C$3,680
• Balance at end of 5-year term ≈ C$527,000
• Total interest over 25 years ≈ C$500,000
• Accelerated bi-weekly (C$1,840/2 weeks) reduces amortization by approximately 3 years and saves ~C$55,000 in interest

Disclaimer

This calculator is for educational and planning purposes only. Actual mortgage payments, CMHC premiums, and eligibility depend on your credit profile, lender policies, and current CMHC rules. Consult a licensed mortgage broker or financial advisor before making borrowing decisions.