Every commercial mortgage application in Canada eventually comes down to one question: can the property support the debt? The metric lenders use to answer that question is the debt service coverage ratio — DSCR.
But DSCR is not a universal number. Different lenders calculate it differently, stress test it differently, and require different minimums. A property that comfortably qualifies at a credit union may fall short at a bank. A deal that fails conventional underwriting may qualify under CMHC. And a deal that fails everywhere else can often be structured with a private lender who does not use DSCR at all.
Understanding how each lender type calculates and applies DSCR is one of the most practical skills a commercial real estate investor can develop. It determines which deals are financeable, how much you can borrow, and which lender to approach first.
What Is DSCR in Commercial Real Estate?
DSCR — Debt Service Coverage Ratio — measures how well a property’s income covers its mortgage payments. The formula is:
DSCR = Net Operating Income (NOI) ÷ Annual Debt Service
Where:
- Net Operating Income (NOI) = Gross rental income − Vacancy allowance − Operating expenses (but before mortgage payments)
- Annual debt service = Total mortgage principal and interest payments for the year
Example:
-
Annual gross rent: $360,000
-
Vacancy allowance (5%): −$18,000
-
Operating expenses: −$120,000
-
NOI: $222,000
-
Annual mortgage payments (P&I): $180,000
-
DSCR: $222,000 ÷ $180,000 = 1.23x
A DSCR of 1.23x means the property generates 23% more income than its annual mortgage payment. Lenders require DSCR above 1.0x because they want a buffer — the property needs to do more than barely cover its debt.
What “enough buffer” means varies dramatically by lender type.
DSCR Requirements by Lender Type
Big 5 Banks: 1.25–1.30x
Canada’s major chartered banks — TD, RBC, BMO, Scotiabank, CIBC, and National Bank — apply the most conservative DSCR requirements. Their commercial mortgage underwriting typically requires:
- Minimum DSCR: 1.25x to 1.30x on the actual loan at the contract rate
- Often stress-tested at a higher rate (contract rate + 1–2%, or a minimum floor rate)
- Most banks want DSCR calculated on stabilized income — current actual rents or market rents, not projections
- Vacancy allowances are typically 5–10% applied by the lender regardless of actual occupancy
Big banks also run secondary underwriting tests alongside DSCR:
- Debt yield: Annual NOI ÷ Loan amount. Banks typically want debt yield of 7–8%+ for most asset types
- LTV limits: Most bank commercial loans cap at 65–70% LTV regardless of DSCR
- Global DSC: For larger borrowers, the bank evaluates the entire borrower’s portfolio-level debt coverage, not just the subject property
The practical implication: a property must be quite healthy — strong occupancy, market rents, lean operating costs — to meet bank DSCR thresholds. Banks are also the strictest about income normalization, often “haircut-ting” income items they consider above-market or non-recurring.
Credit Unions: 1.20–1.25x
Credit unions occupy a middle ground between chartered banks and alternative lenders. They are provincially regulated, which means their underwriting can vary significantly by institution. Many of Canada’s larger commercial credit unions — Meridian, Vancity, Coast Capital, Servus, Access Credit Union — are meaningful commercial lenders with competitive rates and more flexibility than the Big 5.
- Minimum DSCR: 1.20x to 1.25x at contract rate
- Some credit unions apply a modest stress rate (50–100 bps above contract), others underwrite at contract rate only
- More willing to use actual stabilized occupancy rather than a forced vacancy deduction
- Often more flexible on management fee and expense normalization
- LTV limits: typically 65–75% for commercial, up to 80% for multi-family
- Regional lending: Most credit unions focus on their geographic province or region
Credit unions are often the best institutional option for well-performing properties in their coverage area, particularly for smaller and mid-sized borrowers who may not fit the risk appetite of chartered banks.
CMHC Multi-Family (Insured): 1.10x
CMHC insured programs for multi-family residential (apartment buildings, affordable housing, retirement homes) use the most borrower-friendly DSCR thresholds among institutional lenders. This is by design — CMHC’s mandate includes facilitating rental housing supply.
CMHC MLI (standard multi-family):
- Minimum DSCR: 1.10x at the qualifying interest rate
- CMHC uses an interest rate for underwriting purposes (often slightly above contract rate to provide some stress testing)
- NOI calculation uses market vacancy (typically 3–5% for markets with low vacancy, higher in weaker markets)
- Operating expense ratio norms are applied — CMHC may substitute market norms if actuals are too high or too low
CMHC MLI Select:
- MLI Select rewards affordability, accessibility, and energy efficiency commitments with lower insurance premiums and more flexible underwriting
- Minimum DSCR for higher-tier MLI Select: as low as 1.00x at the qualifying rate in some program tiers
- Maximum LTV: up to 85% (compared to 75–80% for standard insured)
The combination of lower DSCR requirements and higher LTV makes CMHC MLI Select one of the most powerful financing tools available to Canadian multi-family investors. The tradeoff is the program’s requirements around affordability, accessibility, or energy performance commitments.
CMHC Conventional (Non-Insured): 1.00x
CMHC also guarantees some non-insured commercial mortgage programs. Conventional CMHC underwriting uses:
- Minimum DSCR: 1.00x at the qualifying rate — the property must break even on debt service
- Lower maximum LTV compared to insured programs
- Full CMHC underwriting review and approval required
This threshold reflects CMHC’s unique mandate and insurance model. Conventional lenders without CMHC backstop would not accept 1.00x DSCR because there is no buffer for vacancies, rent reductions, or expense increases.
Private Lenders: 1.00x or No Requirement
Private commercial lenders have the most flexible DSCR standards by far. Their underwriting is fundamentally asset-based rather than income-based.
- Formal DSCR requirement: 1.00x or none in many cases
- Private lenders look first at the quality of the asset, the LTV, and the borrower’s exit strategy
- For income-producing properties, they want to see that the property is at least cash-flow neutral
- For transitional or vacant properties, private lenders focus entirely on the asset value and the borrower’s plan
- LTV is the primary underwriting metric — typically 65–75% of as-is value
The practical implication: if your deal generates insufficient income to meet bank or credit union DSCR thresholds — perhaps because you are buying at below-market rents, the property has a major vacancy, or you are in lease-up — a private lender can provide financing that a conventional lender cannot. The price is a higher rate (typically 8–12%) and shorter term.
How Each Lender Calculates DSCR Differently
The minimum DSCR number is only part of the story. How lenders calculate the inputs matters as much as the threshold.
Gross Income: Actual vs. Stabilized vs. Market
| Lender | Income Basis |
|---|---|
| Big 5 banks | Stabilized actual rents; may normalize to market if above-market leases present |
| Credit unions | Generally actual rents from rent roll |
| CMHC insured | Market rents per CMHC appraisal norms |
| Private lenders | Actual rents or as-is rents only |
Vacancy Allowance
| Lender | Vacancy Applied |
|---|---|
| Big 5 banks | 5–10% regardless of actual occupancy |
| Credit unions | 5% typical, sometimes actual if below 5% |
| CMHC | Market vacancy per asset class and geography |
| Private | Actual vacancy or minimal haircut |
A bank applying 5% vacancy to a 98%-occupied building is creating a lower effective income for underwriting than the property actually achieves. This matters significantly on the margins.
Management Fee Assumption
Lenders typically assume a management fee even if the owner self-manages. This prevents borrowers from inflating NOI by not accounting for management costs.
| Lender | Management Fee Assumption |
|---|---|
| Big 5 banks | 3–5% of EGI, regardless of actuals |
| Credit unions | 3–5% typical |
| CMHC | Per appraisal and program norms |
| Private | May accept self-management with no imputed cost |
Stress Testing DSCR
This is where banks and credit unions diverge most significantly from private lenders.
Banks do not just check whether you can afford the mortgage at today’s rate — they check whether you could afford it if rates rose.
Bank stress test approach:
- For floating rate commercial loans: underwrite at current rate + 200 basis points
- For fixed rate loans: typically underwrite at contract rate but require 1.25–1.30x, embedding a buffer
Credit union stress test:
- Varies by institution; some underwrite at contract rate + 100 bps, others at contract rate
- Some credit unions specifically underwrite to their posted rate rather than the negotiated rate
CMHC qualifying rate:
- CMHC publishes a qualifying interest rate for its programs, typically above the contract rate
- The qualifying rate embeds a built-in stress margin
Private lenders:
- Rarely stress test DSCR
- Focus on the LTV buffer rather than the income coverage buffer
Comparison: Same Property, Different DSCR Outcomes
Here is how the same property might be underwritten differently across lender types:
Property: 12-unit apartment building
- Gross rents: $168,000/year
- Operating expenses: $56,000 (excluding mortgage)
- Actual vacancy: 2%
| Lender | Income Used | Vacancy | Effective NOI | Loan Request | Annual DS | DSCR | Decision |
|---|---|---|---|---|---|---|---|
| Big 5 bank | $168,000 | 5% = $8,400 | $103,600 | $1.5M | $95,400 | 1.09x | Decline |
| Credit union | $168,000 | 2% = $3,360 | $108,640 | $1.5M | $95,400 | 1.14x | Conditional |
| CMHC insured | Market rents | Market vacancy | $112,000 | $1.5M | $93,200 | 1.20x | Approve |
| Private lender | $168,000 | 2% = $3,360 | $108,640 | $1.2M | $81,600 | 1.33x | Approve |
Note: Different lenders may also use different amortization periods and interest rates, affecting debt service.
The same property, same rents, same performance — but four different DSCR outcomes depending on the lender’s calculation methodology.
DSCR vs. Debt Yield vs. LTV: Which Matters Most to Which Lender?
Different lenders weight these three metrics very differently:
| Metric | Big 5 Banks | Credit Unions | CMHC | Private |
|---|---|---|---|---|
| DSCR | Primary metric | Primary metric | Primary metric | Secondary |
| LTV | Hard cap at 65–70% | Cap at 65–75% | Up to 85% (insured) | Primary metric |
| Debt yield | Secondary metric (7–8% floor) | Less common | Not primary | Rarely used |
| Sponsor quality | Important | Important | Moderate | Critical |
Debt yield = Annual NOI ÷ Loan amount. Unlike DSCR, it is not affected by the interest rate or amortization period, making it a more stable measure. Banks increasingly use debt yield alongside DSCR to stress-test deals independent of rate assumptions.
A property with NOI of $200,000 and a $2.5M loan request has a debt yield of 8% — barely meeting most bank minimums. If the lender cuts the loan to $2.2M, debt yield rises to 9.1%. Banks use this logic to size loans downward from LTV-based maximums when debt yield is insufficient.
How to Improve Your DSCR Before Applying
If your property’s current DSCR does not meet a lender’s minimum, there are several approaches:
Increase Gross Income
- Raise below-market rents to market levels before applying — and document the higher rents for at least 3 months
- Complete value-add improvements that justify rent increases
- Lease vacant units before closing
Reduce Operating Expenses
- Refinance or pay off other property debt that appears in the expense load
- Implement energy efficiency improvements to reduce utility costs
- Challenge property tax assessments if above market
Request a Lower Loan Amount
- A smaller loan means lower annual debt service and a higher DSCR
- Sometimes the answer is a larger down payment, not a different lender
Extend the Amortization
- A 30-year amortization has lower monthly payments than a 25-year amortization
- On a $2M loan at 5.5%, extending from 25 to 30 years saves approximately $5,400 annually in debt service — which may be enough to clear the DSCR threshold
Switch Lender Types
- If you are $50,000 short on NOI to meet a bank DSCR requirement, a credit union or CMHC program may qualify you based on different income normalization methodology
- A commercial mortgage broker can run your numbers across multiple lender types simultaneously and identify which options qualify
Working with an experienced commercial mortgage broker in Canada gives you access to the full range of lender types and their specific DSCR calculations — and can often find a qualifying path that you would not discover on your own. For properties specifically serving the multi-family sector, understanding multi-family financing options is essential, as CMHC programs can significantly expand what is financeable.
Frequently Asked Questions
What DSCR do I need for a commercial mortgage in Canada?
How is DSCR calculated for a commercial property?
What DSCR does CMHC require for insured multi-family mortgages?
Do private lenders use DSCR for commercial properties?
What is debt yield and how does it differ from DSCR?
Can I use projected income to qualify for a commercial mortgage?
How does stress testing affect commercial DSCR qualification?
What is the best lender type for a property with borderline DSCR?
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Consult a licensed mortgage professional before making any financing decisions.
Written by
LendCity
Published
March 15, 2026
Reading time
12 min read
DSCR
Debt Service Coverage Ratio - a metric that compares a property's [net operating income](/glossary/noi) to its mortgage payments. A DSCR of 1.25 means the property generates 25% more income than needed to cover the debt. Lenders typically require a minimum DSCR of 1.0 to 1.25 for investment property loans. See also [Cap Rate](/glossary/cap-rate) and [Cash Flow](/glossary/cash-flow).
Debt Service Coverage Ratio
The Debt Service Coverage Ratio (DSCR) measures a property's annual [net operating income](/glossary/noi) divided by its total annual mortgage payments, indicating whether rental income can cover debt obligations. Canadian lenders typically require a DSCR of 1.1 to 1.3 or higher for investment properties, meaning the property must generate 10-30% more income than needed to service the debt. See also [DSCR Loan](/glossary/dscr-loan) and [Cash Flow](/glossary/cash-flow).
Commercial Mortgage
Financing for commercial properties like retail, office, or multifamily buildings with 5+ units, with different qualification criteria than residential mortgages.
NOI
Net Operating Income - the total income a property generates minus all operating expenses, but before mortgage payments and income taxes. Calculated as gross rental income minus [vacancies](/glossary/vacancy-rate), property taxes, insurance, maintenance, and property management fees. NOI is used to calculate both [Cap Rate](/glossary/cap-rate) and [DSCR](/glossary/dscr).
Underwriting
The process lenders use to evaluate the risk of a mortgage application, including reviewing credit, income, assets, and property value to determine loan approval.
LTV
Loan-to-Value ratio - the mortgage amount expressed as a percentage of the property's appraised value or purchase price (whichever is lower). An 80% LTV means you're borrowing 80% and putting 20% [down](/glossary/down-payment). Lower LTV generally means better [interest rates](/glossary/interest-rate) and terms. See also [Equity](/glossary/equity) and [Leverage](/glossary/leverage).
CMHC
CMHC (Canada Mortgage and Housing Corporation) is a federal Crown corporation that provides mortgage loan insurance to lenders when borrowers have less than a 20% down payment, enabling Canadians to purchase homes with as little as 5% down. For real estate investors, CMHC insurance is available on owner-occupied properties of up to four units, but is generally not available for non-owner-occupied investment properties, meaning investors typically need at least 20% down and must seek conventional financing.
Net Operating Income
Net Operating Income (NOI) is a multifamily property's total annual revenue minus all operating expenses, but excluding debt service, capital expenditures, and income taxes. Calculated as gross rental income minus vacancy losses, property taxes, insurance, utilities, maintenance, and property management fees. NOI is the critical metric lenders use to assess a property's debt service capacity.
Vacancy Rate
The percentage of rental units that are unoccupied over a given period. A critical factor in [cash flow](/glossary/cash-flow) analysis, typically estimated at 4-8% for conservative projections. Vacancy directly reduces [NOI](/glossary/noi).
Interest Rate
The cost of borrowing money, expressed as a percentage. It determines how much you pay on top of the principal borrowed. Interest rates directly affect monthly payments, [cash flow](/glossary/cash-flow), and [DSCR](/glossary/dscr). See also [Amortization](/glossary/amortization).
Amortization
The period over which a mortgage is scheduled to be fully paid off through regular payments of principal and [interest](/glossary/interest-rate). In Canada, common amortization periods are 25 or 30 years, though the mortgage term (when you renegotiate) is typically 1-5 years. A longer amortization lowers monthly payments, improving [cash flow](/glossary/cash-flow) but increasing total interest paid.
Cash Flow
The money left over after collecting rent and paying all expenses including mortgage, taxes, insurance, maintenance, and property management. Positive cash flow is the primary goal of buy-and-hold investors. See also [NOI](/glossary/noi), [Cash-on-Cash Return](/glossary/cash-on-cash-return), and [Vacancy Rate](/glossary/vacancy-rate).
Mortgage Broker
A licensed professional who shops multiple lenders to find the best mortgage rates and terms for borrowers. Unlike banks, brokers have access to dozens of lending options.
Hover over terms to see definitions. View the full glossary for all terms.