DSCR is the metric lenders use to decide whether to finance your rental property. It answers one question: does the property earn enough income to cover the mortgage? Understanding what your number means, and what lenders require, is essential before making any offer on an investment property.
Calculate yours instantly with the free DSCR Calculator.
What DSCR Means
Debt Service Coverage Ratio is calculated as:
DSCR = Net Operating Income / Annual Mortgage Payments
Net Operating Income (NOI) is your gross rental income minus vacancy allowance minus all operating expenses, excluding the mortgage. For a full walkthrough of how to calculate NOI and the other core metrics, see How to Analyze a Rental Property in Canada. Operating expenses include property tax, insurance, maintenance, and property management fees.
Annual mortgage payments are your total principal and interest payments for the year, not including property tax or insurance if those are separate from your mortgage payment.
What the Number Means
- DSCR above 1.25: The property generates 25% more income than needed to cover the mortgage. Most lenders consider this strong for investment property financing.
- DSCR between 1.10 and 1.25: Borderline. Some lenders will approve, others will not. CMHC programs for multi-family properties typically require a minimum of 1.10x, though thresholds vary by program and property type. Confirm requirements with your lender or mortgage broker.
- DSCR between 1.0 and 1.10: The property barely covers its debt. Most conventional lenders will decline. Some alternative lenders may approve at higher rates.
- DSCR below 1.0: The property does not generate enough income to cover the mortgage. This does not mean the deal is automatically bad, but it means you cannot finance it as a standard investment property with most lenders.
Canadian Lender Requirements
Most major Canadian banks and credit unions require a minimum DSCR of 1.20x to 1.25x for investment property financing. This threshold applies to the property on its own merits, separate from your personal income qualification.
Some lenders use a rental offset approach instead of a pure DSCR test, applying a percentage of rental income (typically 50 to 80%) to offset your qualifying mortgage payment. The methodology varies by lender, which is one reason working with a mortgage broker who specializes in investment properties is valuable.
A Real Example
Duplex in Hamilton. Two units at $2,100 each, total monthly rent $4,200.
Annual gross income: $50,400
Vacancy allowance (5%): $2,520
Effective gross income: $47,880
Operating expenses (property tax $7,200, insurance $2,400, maintenance $5,500): $15,100
NOI: $32,780
Mortgage: $560,000 at 4.5%, 25 years
Monthly payment: approximately $3,062
Annual debt service: $36,744
DSCR: $32,780 / $36,744 = 0.89x
Below 1.0. This deal does not qualify for standard investment property financing at these numbers. The investor either needs a lower purchase price, higher rents, or a larger down payment to reduce the mortgage.
How to Improve a Low DSCR
Three levers improve DSCR:
- Lower the mortgage. A larger down payment reduces annual debt service and improves DSCR directly. Going from 20% to 30% down on a $700,000 property reduces the mortgage by $70,000 and annual debt service by approximately $4,600, improving DSCR by roughly 0.12 to 0.15 points.
- Increase NOI. Higher rents or lower operating expenses both improve NOI. Adding a unit, finishing a basement suite, or reducing property management costs all increase DSCR.
- Negotiate a lower purchase price. A lower price reduces the mortgage, which reduces debt service. A 10% price reduction on a $700,000 property improves DSCR by approximately 0.08 to 0.10 points. To understand how DSCR fits alongside cap rate and cash-on-cash return in a full deal analysis, see Cap Rate, Cash-on-Cash, DSCR — What's the Difference.
DSCR at the Stress Test Rate
One important nuance: lenders qualify the mortgage at the stress test rate, not your contract rate. Under OSFI rules, that is the higher of your rate plus 2% or 5.25%.
If your contract rate is 4.5%, your qualifying rate is 6.5%. Your DSCR calculation should use the stress test payment, not the actual payment, to understand whether the deal will qualify. For a deeper look at renewal risk and how rate changes affect your cash flow, see What Happens to Your Cash Flow at Renewal.
Use the Stress Test Calculator to find your qualifying payment, then use that number in your DSCR calculation for a realistic view of lender qualification.
This post is for informational purposes only and does not constitute financial, legal, mortgage, or tax advice. All figures are illustrative estimates based on example inputs. Actual results depend on your specific circumstances. Consult a qualified professional before making any investment decision.
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