A tool used to estimate the profitability of income-generating properties, the net operating income (NOI) calculation provides a critical metric for real estate investors. It determines the property’s revenue after deducting reasonable operating expenses but before deducting debt service (mortgage payments) and income taxes. For example, if a building generates $100,000 in annual rental income and incurs $30,000 in operating expenses (such as property taxes, insurance, and maintenance), the resulting NOI is $70,000.
This financial assessment allows potential buyers to accurately compare different investment opportunities and analyze the potential return on investment independent of financing decisions. Historically, this evaluation has been fundamental to real estate valuation, providing a standardized method for comparing properties across different markets and financing structures. Its use facilitates informed decision-making and risk assessment during property acquisition and management.