What DSCR measures
DSCR compares recurring cash flow with required principal and interest payments. A ratio above 1.00 means operating income exceeds debt service. A ratio below 1.00 means the borrower would need other cash sources to make scheduled payments, before considering reserves or one-time events.
For real estate, the numerator is usually net operating income, or NOI, before debt service and income taxes. For business lending, lenders may use EBITDA or adjusted cash flow. The exact underwriting definition matters because add-backs, vacancy, management fees, and reserves can change the result.
- Commercial real estate lenders use DSCR for acquisition and refinance sizing.
- Small business lenders use it to test operating cash flow against debt.
- Borrowers use it to understand how rent, expenses, and rates affect loan capacity.
How to calculate DSCR
The formula is: DSCR = net operating income / annual debt service. Annual debt service is the total principal and interest due over a year. If monthly payment is known, annual debt service = monthly payment x 12.
Example: a rental property produces 180,000 dollars of gross income and has 60,000 dollars of operating expenses, so NOI is 120,000 dollars. The loan payment is 8,000 dollars per month, or 96,000 dollars per year. DSCR = 120,000 / 96,000 = 1.25. That means the property generates 1.25 dollars of NOI for each dollar of debt service.
How lenders interpret DSCR
Many lenders set a minimum DSCR such as 1.20 or 1.25, but requirements vary by property type, market, borrower strength, loan term, interest rate, and whether the rate is fixed or floating. A riskier asset may need more coverage than a stabilized property with long leases.
DSCR can also size maximum loan proceeds. If a lender requires 1.25 DSCR and underwritten NOI is 120,000 dollars, the maximum allowed annual debt service is 120,000 / 1.25 = 96,000 dollars. The loan amount then depends on interest rate, amortization period, fees, and any loan-to-value cap.
- Higher NOI increases DSCR.
- Higher interest rates or shorter amortization lower DSCR.
- Underwritten expenses and vacancy assumptions can be as important as rent.
Common DSCR mistakes
Do not use gross rent as the numerator. Operating expenses, vacancy, taxes, insurance, repairs, utilities paid by the owner, and management costs must be considered before debt service. Ignoring them can make a weak loan look financeable.
Also avoid mixing monthly and annual figures. Monthly NOI divided by annual debt service will understate DSCR, while annual NOI divided by monthly debt service will overstate it. Keep both numerator and denominator on the same time basis.
Frequently asked questions
Is a DSCR of 1.25 good?
A 1.25 DSCR is a common underwriting target, but good depends on the lender, asset, lease stability, interest rate risk, and market conditions.
Does DSCR include taxes?
Property taxes are usually included as operating expenses in real estate NOI. Income taxes are generally not included in NOI.
Can DSCR be negative?
Yes. If NOI or operating cash flow is negative, DSCR is negative and the asset cannot cover debt service from operations.
Why can two lenders calculate different DSCRs?
They may use different vacancy assumptions, expense adjustments, reserve requirements, management fees, or definitions of eligible cash flow.