Commercial Mortgage Calculator Canada

How is a commercial mortgage payment calculated in Canada?

Commercial mortgage payments in Canada follow the same fundamental amortization formula as residential mortgages, but with one critical difference: the Interest Act (RSC, 1985, c. I-15) requires semi-annual compounding for fixed-rate mortgages. This means the nominal annual rate is compounded twice per year, not twelve times. The effective monthly rate is lower than simple division by 12 would suggest, which slightly reduces the payment compared to monthly compounding.

The formula converts the nominal annual rate to an effective annual rate using EAR = (1 + r/2)^2 - 1, then derives the monthly rate as r_monthly = (1 + EAR)^(1/12) - 1. The monthly payment is then calculated as: Payment = (r_monthly * Principal) / (1 - (1 + r_monthly)^(-n)), where n is the total number of monthly payments over the amortization period.

For example, a $1,500,000 commercial mortgage at a 5.5% nominal rate amortized over 25 years uses an effective annual rate of 5.576% and a monthly rate of approximately 0.4532%. The resulting monthly payment is $9,176. Under simple monthly compounding (dividing 5.5% by 12), the payment would be $9,207, a difference of $31 per month or $372 per year. Over 25 years, the semi-annual compounding convention saves the borrower approximately $9,300 in interest.

Commercial mortgages in Canada have a split structure: the amortization period (typically 25 years, but up to 40 years for CMHC-insured properties) determines the payment size, while the term (1 to 10 years) determines when you must renew. At term renewal, the outstanding balance is refinanced at the prevailing market rate. This structure means commercial mortgage borrowers face renewal risk that residential borrowers with fully amortizing products do not.

What is DSCR and why does it matter for commercial mortgages?

The Debt Service Coverage Ratio (DSCR) is the single most important qualification metric for commercial mortgages. It measures the property's ability to generate enough income to cover debt payments. The formula is simple: DSCR = Net Operating Income (NOI) / Annual Debt Service. A DSCR of 1.20 means the property generates 20% more income than needed to cover mortgage payments.

Conventional commercial mortgage lenders in Canada typically require a minimum DSCR of 1.20x to 1.30x. This provides a cushion for vacancy, unexpected repairs, and economic downturns. CMHC-insured multifamily mortgages are more lenient, with the MLI Select program accepting a DSCR floor of 1.10x for properties that meet energy efficiency or accessibility standards.

Net Operating Income (NOI) is calculated as: gross rental income minus vacancy allowance (typically 3% to 5%) minus operating expenses (property taxes, insurance, maintenance, management fees, utilities paid by owner). NOI does not include debt service, depreciation, or income taxes. Lenders will verify your NOI using at least two years of operating statements and may apply their own vacancy and expense assumptions.

If your DSCR falls below the lender's requirement, you have three options: increase the down payment to reduce the loan amount (and therefore debt service), negotiate a longer amortization to lower the monthly payment, or improve the NOI by increasing rents or reducing expenses. This calculator shows the maximum loan amount that satisfies your target DSCR, so you can quickly see how much you need to adjust.

LTV limits: conventional vs CMHC-insured commercial mortgages

Loan-to-Value (LTV) ratio is the second key qualification metric. It represents the mortgage amount as a percentage of the property's appraised value. Commercial LTV limits are more restrictive than residential limits because commercial properties carry more risk.

Conventional commercial mortgages from banks, credit unions, and private lenders cap LTV at 75%. This means the borrower must provide a minimum 25% down payment. Larger down payments (30% to 35%) often secure better rates because the lender's exposure is reduced. For riskier property types like vacant land, development sites, or single-purpose properties (hotels, gas stations), LTV limits may drop to 50% to 65%.

CMHC-insured commercial mortgages for multi-unit residential properties (5+ units) allow LTV up to 85%, reducing the required down payment to 15%. The CMHC MLI Select program can push LTV even higher (up to 95% for the residential portion) for properties that meet energy efficiency, accessibility, or affordability criteria. CMHC insurance comes with a premium that depends on the amortization period and the LTV ratio.

CMHC-insured commercial mortgages also offer lower interest rates (typically 0.5% to 1.5% below conventional) and longer amortization periods (up to 40 years standard, up to 50 years under MLI Select). The tradeoff is a more rigorous application process, CMHC insurance premiums, and restrictions on property type (only multi-unit residential qualifies).

What are current commercial mortgage rates in Canada?

Commercial mortgage rates in Canada depend on the loan type (conventional vs CMHC-insured), the property type, the borrower's profile, and prevailing market conditions. As of early 2026, CMHC-insured commercial mortgage rates range from 3.25% to 4.25%, while conventional rates sit between 4.50% and 7.95%.

CMHC-insured rates are lower because the government guarantee reduces the lender's risk. Conventional rates are higher because the lender bears the full credit risk. Within the conventional category, rates vary significantly by property type: well-leased multi-tenant office or retail buildings command lower rates than single-tenant, special-purpose, or development properties.

The Bank of Canada overnight rate influences all commercial mortgage rates. When the overnight rate falls, commercial rates typically follow with a lag of 2 to 4 weeks. Variable-rate commercial mortgages are priced as prime + spread and adjust immediately. Fixed-rate commercial mortgages are priced off Government of Canada bond yields plus a spread.

To secure the best commercial mortgage rate: provide a larger down payment (30%+ vs the minimum 25%), demonstrate strong NOI with a DSCR above 1.30x, have the property professionally appraised, provide 2+ years of audited financial statements, and get quotes from at least three lenders including a CMHC-approved lender, a bank, and a credit union.

Worked example: $2M commercial property

Consider a $2,000,000 multi-unit apartment building generating $160,000 in annual Net Operating Income. The buyer puts $500,000 down (25%) and finances $1,500,000 at 5.5% over a 25-year amortization.

Using Canadian semi-annual compounding, the monthly payment is $9,176. Annual debt service is $110,112. The DSCR is $160,000 / $110,112 = 1.45x, which exceeds the typical 1.20x requirement. The LTV is 75%, which qualifies for conventional financing.

Total interest paid over the full 25-year amortization is $1,252,762. Total cost (principal + interest) is $2,752,762. In the first year, $62,449 goes to interest and $47,663 goes to principal. By year 10, the split shifts: $47,126 in interest and $63,986 in principal. The remaining balance after 10 years is approximately $1,137,916.

Now consider the same property with CMHC insurance at 4.0% and 35-year amortization. The down payment drops to $300,000 (15%), making the loan $1,700,000. The monthly payment is $6,866. Annual debt service is $82,392. The DSCR improves to 1.94x. Total interest is $1,183,128 over 35 years, but the lower monthly payment frees up $2,310/month in cash flow compared to the conventional scenario.

What property types qualify for commercial mortgages?

Commercial mortgages cover a wide range of income-producing properties. Each property type has different LTV limits, rate premiums, and qualification requirements based on the perceived risk.

• ✓Multi-unit residential (5+ units): The most favourable financing. Eligible for CMHC insurance with LTV up to 85%, amortization up to 40 years, and the lowest rates. Vacancy rates for well-located apartment buildings are typically 2-4%.
• ✓Retail and strip malls: Conventional financing at 65-75% LTV. Lenders evaluate the tenant mix, lease terms, and location. Single-tenant retail carries more risk than multi-tenant.
• ✓Office buildings: 65-75% LTV conventional. Lenders focus on occupancy rates, lease duration, and tenant creditworthiness. Class A office buildings in major cities get the best terms.
• ✓Industrial and warehouse: 65-75% LTV. Industrial properties often have lower operating costs and strong demand, making them attractive to lenders. Purpose-built facilities may face stricter terms.
• ✓Mixed-use (commercial/residential): The residential portion may qualify for CMHC insurance if it represents the majority of the building. The commercial portion is financed at conventional terms.
• ✓Development and land: 50-65% LTV with higher rates and shorter terms. Lenders require detailed pro formas, building permits, and pre-sale or pre-lease commitments.

How to get the best commercial mortgage rate in Canada

Commercial mortgage rates are negotiable. The difference between a 5.0% and a 6.0% rate on a $1,500,000 mortgage over 25 years is approximately $100,000 in total interest. These strategies help you secure the most competitive terms.

• ✓Explore CMHC insurance for multi-unit residential. The premium pays for itself through lower rates and higher LTV. A CMHC-insured mortgage at 4.0% costs significantly less than a conventional mortgage at 5.5%, even after accounting for the insurance premium.
• ✓Provide 30%+ down payment for conventional deals. Moving from 25% to 30% down often reduces the rate by 0.25% to 0.50% because the lender's loss exposure decreases. On a $1.5M mortgage, that saves $3,750 to $7,500 per year.
• ✓Get the property professionally appraised before applying. A strong appraisal supports a higher property value, which improves your LTV ratio. The cost ($2,000 to $5,000) is a small investment relative to the rate savings.
• ✓Prepare 2+ years of audited financial statements. Lenders want to see consistent NOI trends. Properties with stable or growing NOI get better terms than those with volatile income.
• ✓Compare at least three lenders: a CMHC-approved lender, a major bank, and a credit union or alternative lender. Each has different risk appetites and pricing models. Credit unions like Desjardins and Vancity often offer competitive commercial terms.
• ✓Negotiate the term length strategically. Shorter terms (1-3 years) typically have lower rates but expose you to renewal risk sooner. Longer terms (5-10 years) lock in the rate but cost more. Match the term to your investment horizon.
• ✓Consider an interest-only period for value-add properties. Some lenders offer 1-2 years of interest-only payments during renovations, which preserves cash flow while you increase the property's NOI.