DSCR

DSCR, or debt service coverage ratio, measures the ability of an investment or a prospective borrower to generate enough income to meet debt obligations. In property, a DSCR of 1 or greater is generally consistent with a cashflow-neutral or positive scenario before tax. A value of 1.00 means income matches expenses and debt repayments. Less than 1.00, such as 0.89, means income is less than expenses and debt repayments. More than 1.00, such as 1.25, means income is comfortably more than expenses and debt repayments.

DSCR is calculated as net operating income divided by annual debt service. In simple terms, DSCR = NOI / annual debt service = (Annual Rent - expenses) / annual debt service. This makes it a direct way to compare the income produced by a property with the expected expenses of the property and the annual debt repayment required on the mortgage.

For commercial property and companies, where the main source of income is commercial activities, DSCR is a critical indicator used by banks when assessing a loan. In residential investing, lenders tend to focus more on a borrower's overall income and expenses and apply buffered interest rates that are typically 2 or 3% above current rates when assessing serviceability. Even so, DSCR remains a useful indicator for retail residential property investors because it uses your declared income, expenses, available deposit, and other loan criteria to provide an indication, not a guarantee, of your ability to service a property.

Unlike rental yield and some loan terms, DSCR can vary significantly across purchase scenarios because a larger deposit reduces the loan and therefore reduces annual debt service. For example, a million-dollar property that rents for $800 per week may have a DSCR of 0.55 if purchased with a 5% deposit, which is 95% LVR, or 10.42 if purchased with a 95% deposit, which is 5% LVR. Once DSCR moves much above about 1.75, often around the 30% LVR mark depending on rental yield, it becomes less meaningful as a risk-management metric because the property is largely unleveraged.

Our analyser uses DSCR as one of the principal metrics for all membership tiers. Premium and Professional members can stress-test scenarios such as rental income loss, rate increases, and reserving money for expenses to see how DSCR changes in a worst-case scenario. The app uses both whole-of-portfolio and single-asset DSCR to indicate whether a property can support its own loan. A stressed DSCR of 1.10 or above is likely to provide a reasonable buffer because total income is enough to cushion unexpected life events, repairs, vacancies, or rate increases. Between 1.10 and 0.75 is quite normal, while below 0.75 is generally viewed as risky and may attract additional scrutiny. Approval may still occur depending on borrower income, expenses, overall financial position, and lender policies.

Ambrose, B. W., and Sanders, A. B. (2003), Commercial Mortgage-Backed Securities: Prepayment and Default, Journal of Real Estate Finance and Economics; Australian Prudential Regulation Authority, Prudential Practice Guide APG 223 (Residential Mortgage Lending); Reserve Bank of Australia, Financial Stability Reviews; Corporate Finance Institute, DSCR Guide.