If you are moving into commercial lending as a broker — or trying to understand how a business loan application gets assessed — DSCR is the single most important number you need to understand. It determines whether a commercial loan gets approved or declined more than almost any other metric.
DSCR stands for Debt Service Coverage Ratio. It measures whether a business generates enough income to cover its debt repayments — and it is used by virtually every commercial lender in Australia to assess serviceability on business loans, commercial property loans, and development finance.
The formula is straightforward:
Where:
A DSCR of 1.0x means the business generates exactly enough income to cover its debt repayments — no buffer. A DSCR of 1.5x means the business generates 50% more income than it needs to service its debt.
Most Australian commercial lenders require a minimum DSCR of 1.2x to 1.5x depending on the lender, the loan type, and the security offered. Here is the general landscape:
A DSCR below 1.0x means the business cannot cover its debt from income alone. Most lenders will not proceed without additional security or a guarantor. Understanding this before lodging an application saves time, protects your client relationship, and protects your trail income from a clawback.
A business owner wants to purchase a commercial property for $1.2M. The proposed loan is $840,000 (70% LVR) at 6.8% interest over 20 years — annual debt service of approximately $76,400.
The property generates $92,000 per year in net rental income (after outgoings but before debt service).
DSCR = $92,000 ÷ $76,400 = 1.20x
This is at the minimum threshold for most lenders. A broker presenting this deal would need to be strategic about which lender to approach and how the application notes frame the income.
Lenders assess net operating income — after operating expenses but before debt service. Using revenue figures without deducting operating costs overstates the DSCR and leads to declined applications or embarrassing resubmissions.
Total Debt Service includes all existing business debt repayments, not just the proposed new loan. A business with $800,000 in existing equipment finance repayments needs a much higher NOI to achieve an acceptable DSCR on a new commercial loan.
Most lenders assess serviceability at an assessment rate — typically 1–2% above the actual rate. A deal that passes DSCR at the contract rate may fail at the assessment rate. Always check both.
Residential lending serviceability focuses on the borrower's personal income and expenses assessed against the proposed repayment at the lender's floor rate plus the 3% APRA buffer. It is primarily a personal income test.
Commercial DSCR is a business income test. It does not look at the borrower's personal income in isolation — it looks at whether the business or investment property generates enough cash to service the debt. This is why a high-income professional can be declined for a commercial loan if the underlying business does not generate sufficient NOI, and why a business with modest owner income can be approved if the cash flow is strong.
Understanding DSCR before you approach a lender is not optional — it is the difference between a deal that gets approved and one that wastes everyone's time. Before lodging any commercial application:
The Commercial Finance Masterclass covers DSCR, commercial loan structures, reading P&L statements, lender policy, development finance, private credit, and deal construction — 43 modules, self-paced, $97 one-time access.
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