How to use this calculator
- Enter potential annual rental income, annual vacancy and credit loss, other annual property income, annual operating expenses.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Operating costs should include your chosen reserve convention consistently; vacancy assumptions are not market data.
Worked example
With potential annual rental income = 30000, annual vacancy and credit loss = 1500, other annual property income = 500, annual operating expenses = 9000, net operating income is approximately 20000.
What the result means
NOI excludes loan principal, interest, depreciation and investor income tax.
Common questions
How should I interpret net operating income?
NOI excludes loan principal, interest, depreciation and investor income tax.
What should I check before using this result?
Operating costs should include your chosen reserve convention consistently; vacancy assumptions are not market data.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.