How the Canadian Mortgage Calculator Works
MortgageMasher uses the correct Canadian mortgage formula — semi-annual compounding as required by the Interest Act of Canada — to give you an accurate monthly payment. Simply enter your home price, down payment, interest rate and amortization period to instantly see your full mortgage picture.
01
Enter Property & Loan Details
Enter your home price and down payment — either as a dollar amount or percentage. The calculator immediately flags if CMHC insurance applies and enforces the 25-year maximum amortization for insured mortgages.
02
Set Your Rate & Terms
Enter your interest rate and choose your amortization period and payment frequency. You can also add property tax, condo fees and home insurance to see your full monthly housing cost.
03
See Your Full Picture
Instantly see your payment amount, total interest over the life of the mortgage, CMHC premium if applicable, and a side-by-side amortization comparison across multiple time periods.
Why Canadian Mortgage Math is Different
Canadian mortgages are calculated differently than mortgages in the United States or most other countries. Under the Interest Act of Canada, mortgage interest must compound semi-annually — that is, only twice per year. In the US and many other countries, mortgages compound monthly (12 times per year).
This means that a US mortgage calculator will give you a slightly wrong answer for a Canadian mortgage — even if you enter the same interest rate. The effective monthly rate for a Canadian mortgage is derived by taking the semi-annual rate and converting it to a monthly equivalent, which produces a slightly different number than simply dividing the annual rate by 12.
MortgageMasher uses the correct Canadian formula throughout all calculations, ensuring your results accurately reflect what your actual lender will charge.
Understanding Payment Frequency Options
Monthly: One payment per month, 12 payments per year. The standard option for most Canadian mortgages.
Semi-Monthly: Two payments per month, 24 payments per year. Each payment is half the monthly amount. No interest savings over monthly — you're simply splitting the payment.
Accelerated Bi-Weekly: A payment every two weeks, totalling 26 payments per year. Because 26 half-payments equals 13 full monthly payments, you effectively make one extra monthly payment per year. This can reduce a 25-year mortgage by approximately 3 years and save tens of thousands in interest — with only a modest increase in your regular payment.
Weekly: 52 payments per year. Similar to accelerated bi-weekly in effect — you make the equivalent of slightly more than 12 monthly payments per year.
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Canadian Mortgage Rules — CMHC Insurance Explained
CMHC mortgage insurance (also called mortgage default insurance) is mandatory for any home purchase in Canada where the down payment is less than 20% of the purchase price. It is administered by Canada Mortgage and Housing Corporation (CMHC), Sagen, and Canada Guaranty.
It is important to understand that CMHC insurance protects the lender — not the borrower — in the event of mortgage default. Despite this, it benefits buyers by allowing them to purchase a home with as little as 5% down, which would otherwise be unavailable from most lenders without the insurance backing.
2026 CMHC Premium Rates
| Down Payment | Loan-to-Value Ratio | CMHC Premium Rate | Example on $500,000 |
|---|
| 5% – 9.99% | 90.01% – 95% | 4.00% | $19,000 |
| 10% – 14.99% | 85.01% – 90% | 3.10% | $13,950 |
| 15% – 19.99% | 80.01% – 85% | 2.80% | $11,900 |
| 20% or more | 80% or less | No CMHC required | $0 |
The CMHC premium is added to your mortgage principal and paid off over the life of your amortization period. Provincial sales tax on the premium may also apply in some provinces and must be paid upfront.
When CMHC Insurance is Not Available
CMHC insurance is not available for homes priced at $1,000,000 or more — a 20% minimum down payment is required for all homes at this price point. Additionally, CMHC-insured mortgages are limited to a maximum 25-year amortization period. Conventional mortgages with 20% or more down can amortize over 30 years.
The First Home Savings Account (FHSA)
Introduced in 2023, the First Home Savings Account is one of the most powerful tools available to Canadians saving for their first home. Key features include:
- Annual contribution limit of $8,000, with a $40,000 lifetime maximum
- Contributions are tax-deductible — like an RRSP
- Qualifying withdrawals for a first home purchase are completely tax-free — like a TFSA
- Unused contribution room carries forward to the following year
- Can be combined with the Home Buyers' Plan (HBP) for additional RRSP withdrawals
A first-time buyer maximizing their FHSA for 5 years could accumulate $40,000 in contributions plus investment growth, all tax-free at withdrawal. This can significantly reduce the mortgage required and may help reach the 20% down payment threshold to eliminate CMHC insurance.
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Six Ways to Save Money on Your Canadian Mortgage
Small decisions at the time of purchase can save tens of thousands of dollars over the life of your mortgage. These strategies have the biggest financial impact.
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Put 20% Down to Eliminate CMHC
Saving to the 20% down payment threshold eliminates mandatory CMHC mortgage insurance entirely. On a $600,000 home, the difference between 19% and 20% down is just $6,000 more in your down payment — but it saves you approximately $14,250 in CMHC premiums added to your mortgage. If you're close to 20%, it is almost always worth waiting to save that extra amount.
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Choose Accelerated Bi-Weekly Payments
Switching from monthly to accelerated bi-weekly payments effectively adds one extra monthly payment per year. On a $500,000 mortgage at 5.25% over 25 years, accelerated bi-weekly payments can reduce your amortization by approximately 3 years and save over $30,000 in interest — with only a modest increase in your regular payment amount.
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Make Annual Lump Sum Payments
Most Canadian mortgages allow annual lump sum prepayments of 10–20% of the original mortgage balance without penalty. Even one $5,000 lump sum payment in year one can save thousands in interest and shave months off your mortgage. Tax refunds, bonuses and inheritance are natural opportunities to make meaningful lump sum payments.
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Choose a Shorter Amortization
Every year you reduce your amortization period saves significant interest. Choosing 20 years instead of 25 years on a $500,000 mortgage at 5.25% increases your monthly payment by approximately $350 but saves over $60,000 in total interest. If your budget can comfortably handle the higher payment, a shorter amortization is one of the most powerful wealth-building decisions you can make.
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Shop Aggressively at Renewal
Your mortgage is not locked to your current lender forever. At each renewal term (typically every 1–5 years) you are free to switch lenders without penalty. Rate differences of even 0.25% translate to thousands of dollars over a 5-year term. Start rate shopping at least 120 days before your renewal date.
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Pay Down High-Interest Debt First
Before increasing your mortgage down payment beyond 20%, consider whether you have other high-interest debt (credit cards at 20%+ or car loans at 7–10%). In most cases, paying off high-interest debt first delivers a higher guaranteed return than reducing a 5% mortgage. Use our Debt Payoff Calculator to see exactly which debts to tackle first.
🤝 Get the Best Rate — Work With a Licensed Mortgage Broker
MortgageMasher helps you understand your mortgage numbers. But when it comes to actually securing your mortgage, we strongly recommend working with a licensed mortgage broker rather than going directly to your bank.
Mortgage brokers are regulated professionals who are legally required to act in your best interest. They have access to rates and products from dozens of lenders — including banks, credit unions, monoline lenders and private lenders — that you cannot access directly on your own.
Access to More LendersA broker compares rates from 20–50+ lenders simultaneously. Your bank only offers their own products. More competition means better rates for you.
Typically Free to YouIn most cases, mortgage brokers are paid by the lender — not by you. You receive professional advice and rate shopping at no direct cost.
Rate Savings Add UpEven a 0.25% better rate on a $600,000 mortgage saves approximately $18,000 over a 25-year amortization. A 0.5% savings doubles that.
Provincially RegulatedMortgage brokers in Canada are licensed and regulated provincially. Look for a broker registered with your provincial mortgage regulator for full consumer protection.
MortgageMasher does not recommend specific brokers or brokerage firms and does not receive compensation for this referral. This is general advice only — not financial advice. Please conduct your own due diligence when selecting a mortgage professional.
Frequently Asked Questions — Canadian Mortgages
What is CMHC mortgage insurance and do I need it?
CMHC mortgage insurance is mandatory for any home purchase in Canada where the down payment is less than 20% of the purchase price. The premium ranges from 2.8% to 4.0% of the mortgage amount and is added to your mortgage principal. It protects the lender in case of default — not the borrower. If your down payment is 20% or more, CMHC insurance is not required and you save the entire premium amount. For homes priced at $1,000,000 or more, CMHC insurance is not available at any down payment level.
How is a Canadian mortgage calculated differently from a US mortgage?
Canadian mortgages compound interest semi-annually (twice per year) as required by the Interest Act of Canada. US mortgages compound monthly (12 times per year). This means using a standard US mortgage calculator for a Canadian mortgage will produce a slightly incorrect payment amount. MortgageMasher uses the correct Canadian semi-annual compounding formula, converting the semi-annual rate to an effective monthly rate before calculating your payment. This is the same formula your Canadian lender uses.
What is the minimum down payment in Canada in 2026?
The minimum down payment in Canada depends on the purchase price. For homes priced at $500,000 or less, the minimum is 5%. For homes between $500,000 and $999,999, the minimum is 5% on the first $500,000 and 10% on the remaining amount. For homes priced at $1,000,000 or more, the minimum is 20% and CMHC mortgage insurance is not available. These rules apply to owner-occupied properties and primary residences — investment properties have different requirements.
Is bi-weekly better than monthly mortgage payments?
Accelerated bi-weekly payments are significantly better than monthly payments for paying off your mortgage faster. With accelerated bi-weekly payments you make 26 half-payments per year — the equivalent of 13 full monthly payments instead of 12. This one extra payment per year can reduce a 25-year mortgage by approximately 3 years and save tens of thousands of dollars in interest. Standard bi-weekly payments (not accelerated) simply split the monthly payment in half and offer no additional benefit. Always choose accelerated bi-weekly over standard bi-weekly when offered the option.
What is the Canadian mortgage stress test?
The mortgage stress test requires all borrowers at federally regulated lenders in Canada to qualify at the higher of their actual contract rate plus 2%, or 5.25% — whichever is greater. For example, if your mortgage rate is 5.25%, you must prove you can afford payments at 7.25%. If your rate is 3%, you must qualify at 5.25%. The stress test is designed to ensure borrowers can handle future interest rate increases. It effectively reduces your maximum qualifying mortgage amount compared to qualifying at your actual rate.
What is the First Home Savings Account (FHSA)?
The FHSA is a registered savings account introduced in Canada in 2023 specifically for first-time home buyers. You can contribute up to $8,000 per year with a $40,000 lifetime maximum. Contributions are tax-deductible (reducing your taxable income like an RRSP), and qualifying withdrawals to purchase a first home are completely tax-free (like a TFSA). Unused contribution room carries forward one year. The FHSA can be used in combination with the Home Buyers' Plan for additional RRSP withdrawals, giving first-time buyers a powerful combination of tax advantages when saving for a home purchase.
How do I get the best mortgage rate in Canada?
The most effective way to get the best mortgage rate is to work with a licensed mortgage broker. A broker simultaneously compares rates from dozens of lenders — including banks, credit unions, and monoline lenders — that you cannot access independently. Because brokers bring volume to lenders, they often secure rates below what an individual can negotiate directly. Beyond using a broker, factors that help secure the best rate include a strong credit score (720+), a stable employment history, a low debt-to-income ratio, and a down payment of 20% or more. Start rate shopping early — ideally 3-4 months before you need to close.
What amortization period should I choose for my Canadian mortgage?
Choose the shortest amortization period where the monthly payment is comfortably within your budget — not the maximum period available. A 25-year amortization is the Canadian standard, but choosing 20 years can save tens of thousands in interest while increasing your monthly payment by roughly 15-20%. If you have an insured mortgage (under 20% down), 25 years is the maximum allowed. If you have a conventional mortgage with 20%+ down, 30-year amortization is available — but the additional interest cost is substantial and is generally only recommended when the lower payment is genuinely necessary for cash flow reasons.
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