How is a Canadian mortgage payment calculated?

Canadian mortgage payments use semi-annual compounding, which is required by law. The effective monthly rate is calculated as: r = (1 + annualRate/200)^(1/6) - 1. Your payment is then: P × r × (1+r)^n / ((1+r)^n - 1), where P is the mortgage principal and n is the number of months. This differs from US mortgages, which compound monthly.

What is the difference between bi-weekly and accelerated bi-weekly payments?

Regular bi-weekly payments divide your annual payment by 26 (every two weeks), so you pay the same total as monthly. Accelerated bi-weekly payments are half your monthly payment paid every two weeks — because there are 26 bi-weekly periods in a year, you effectively make one extra full monthly payment per year. This alone typically saves 2–3 years on a 25-year mortgage.

Does the amortization period affect my payment?

Significantly. A $500,000 mortgage at 4.89% has a monthly payment of about $2,876 over 25 years, but only $2,606 over 30 years — a $270/month difference. However, the 30-year option costs approximately $50,000 more in total interest. Choosing a longer amortization lowers your payment but increases total cost.

How much less will I pay with a 0.5% lower rate?

On a $500,000 mortgage over 25 years, dropping from 5.0% to 4.5% saves approximately $137/month in payments — that is $1,644/year or $41,100 over the full amortization. On a $700,000 mortgage the savings are proportionally larger: roughly $191/month or $57,500 over 25 years. This is why shopping brokers vs banks matters.

What is the maximum amortization for an insured mortgage in Canada?

For insured mortgages (down payment under 20%), the maximum amortization is 25 years as of 2024. For uninsured mortgages (20%+ down payment), lenders can offer up to 30 years. Note: in late 2024, the federal government announced changes allowing 30-year amortization for first-time buyers on new construction with insured mortgages.

How do I calculate my mortgage payment if I only have the annual rate?

Convert the annual rate using Canadian semi-annual compounding: effective monthly rate r = (1 + annualRate/200)^(1/6) - 1. For example, a 4.89% annual rate gives r = (1 + 0.0489/2)^(1/6) - 1 ≈ 0.4013% per month. Then use the standard payment formula: Payment = Principal × r × (1+r)^n / ((1+r)^n - 1). Our calculator does this automatically.

Free Tool — 2026

Mortgage Payment Calculator Canada

Calculate your exact monthly, bi-weekly, or weekly mortgage payment using the correct Canadian semi-annual compounding formula. Includes CMHC insurance, amortization schedule, and payment frequency comparison.

Current best mortgage rate: 4.89% (5-year fixed, broker)

Your Payment

$3,470.19

Monthly payment

Home Price$650,000

$200K$2M

Down Payment10% — $65,000

5%50%

Interest Rate (%)

Amortization

CMHC Mortgage Insurance Required

With less than 20% down, CMHC insurance of $18,135 is added to your mortgage, bringing it to $603,135.

Mortgage Amount

$603,135

Total Interest

$437,922

Total Cost

$1,041,057

Interest % of Price

67.4%

Principal vs Interest Breakdown

57.9% principal42.1% interest

Principal

Interest

Principal — $603,135

Interest — $437,922

Amortization Schedule

Year	Annual Payments	Principal	Interest	Balance
Year 1	$41,642	$12,725	$28,917	$590,410
Year 2	$41,642	$13,355	$28,288	$577,055
Year 3	$41,642	$14,016	$27,626	$563,040
Year 4	$41,642	$14,710	$26,933	$548,330
Year 5	$41,642	$15,438	$26,205	$532,892

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How Canadian Mortgage Payments Are Calculated

Canadian mortgage law requires interest to compound semi-annually (twice per year), unlike the United States where mortgages compound monthly. This distinction matters because it changes the effective rate applied to each payment period.

The calculation starts by converting the annual rate to a monthly equivalent using semi-annual compounding:

r = (1 + annualRate / 200)^1/6 - 1

Example: 4.89% annual → r ≈ 0.4013% per month

Then the standard mortgage payment formula is applied:

Payment = P × r × (1 + r)ⁿ / ((1 + r)ⁿ - 1)

Where P = principal, n = total number of monthly payments

Because Canadian compounding is semi-annual rather than monthly, the effective rate per payment period is slightly lower than the US equivalent. On a $500,000 mortgage at 4.89% over 25 years, Canadian compounding saves approximately $3,200 in total interest compared to monthly compounding at the same stated rate.

Payment Frequency Comparison

$500,000 mortgage at 4.89%, 25-year amortization. Accelerated frequencies make one extra monthly payment equivalent per year.

Frequency	Per Payment	Payments/Year	Annual Total
Monthly	$2,876	12	$34,512
Bi-weekly	$1,321	26	$34,346
Accelerated Bi-weekly	$1,438	26	$37,388
Weekly	$660	52	$34,320
Accelerated Weekly	$719	52	$37,388

5 Ways to Lower Your Mortgage Payment

Reduce your debt-to-income ratio

Paying off car loans, credit cards, or student debt before applying lowers your TDS ratio and may qualify you for a lower rate tier. Lenders price risk — lower debt means lower rate offers.

Increase your down payment

Every extra dollar of down payment reduces your mortgage directly. Going from 10% to 20% also eliminates CMHC insurance, which can add 3.1–4.0% to your mortgage amount.

Extend your amortization

Choosing 30 years over 25 years reduces monthly payments, though total interest cost increases. Only available if your down payment is 20%+ (uninsured mortgage).

Shop for a lower rate

Mortgage brokers access wholesale rates unavailable at bank branches. The rate difference is typically 0.30–0.70%. On a $600,000 mortgage, each 0.10% saves roughly $7,000–$10,000 in total interest.

Add a co-borrower

A co-borrower with good income and credit combines with yours to qualify for a larger mortgage — and potentially a better rate tier. Both incomes count toward GDS/TDS ratios.

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