How to Calculate N O I
What is N O I?
Calculates Net Operating Income subtracting operating expenses from gross rental income. Key metric for property evaluation.
Formula
NOI = Gross Rental Income - Operating Expenses
- NOI
- Gross Rental Income - Operating Expenses — Gross Rental Income - Operating Expenses
Step-by-Step Guide
- 1NOI = Gross Rental Income - Operating Expenses
- 2Gross Income = (rent per unit × units × occupancy %) + other income
- 3Operating Expenses = property taxes, insurance, utilities, maintenance, property management, etc.
- 4NOI excludes debt service, capital expenditures, income taxes
Worked Examples
Input
Revenue $20k, expenses $10k
Result
NOI $10k
Common Mistakes to Avoid
- ✕Including debt service (only operating expenses)
- ✕Overestimating income (use realistic occupancy)
- ✕Underestimating maintenance and reserves
Frequently Asked Questions
What's NOT included in NOI?
Debt service (mortgage payments), income taxes, capital expenditures, non-operating income/expenses.
What operating expenses typical?
Rule of thumb: 30-40% of gross income; varies by property type and age.
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