DSCR Explained: NOI, Debt & Lender Methods

Keep periods and definitions consistent

Annual NOI divided by annual debt service and monthly NOI divided by monthly debt service give the same ratio when the inputs describe the same period. Mixing annual income with a monthly payment produces a misleading result. Include the relevant required loan payments, not just interest.

At $19,500 NOI and $15,000 annual debt service, the remaining $4,500 is an arithmetic cushion before any expenses excluded from that NOI definition. It is not necessarily spendable profit.

Why a lender may show a different DSCR

Some residential investor-loan programs calculate coverage using rent divided by PITIA: principal, interest, taxes, insurance and association dues. That is different from subtracting operating expenses to calculate NOI and then dividing by debt service. Ask the lender which income, vacancy, expense and reserve assumptions apply.

For example, $2,400 monthly rent divided by $1,800 PITIA gives approximately 1.33. That figure alone says nothing about maintenance or vacancy. OneDEAL's NOI-based model includes a capital-reserve expense; do not assume its result matches a lender's qualifying ratio.

Use coverage alongside cash needs

There is no universal loan approval hidden inside a calculator result. A lender may also consider property eligibility, appraisal, liquidity, credit, loan size and other conditions. Confirm the actual program requirements before making a financing commitment.

• Stress lower collected rent and higher expenses.
• Compare the resulting monthly cash flow with upcoming capital work.
• Review all lender definitions and terms before relying on the ratio.