A Net Operating Income (NOI) calculator is a tool used to calculate the income generated by an income-producing property after operating expenses are deducted, but before financing costs, taxes, and depreciation.
It is commonly used in real estate investing to evaluate the profitability of properties such as rental apartments, commercial buildings, and office spaces.
Basic formula:
Net Operating Income (NOI) = Gross Operating Income − Operating Expenses
Components:
1. Gross Operating Income (GOI)
The total income a property generates, including:
- Rent collected
- Parking fees
- Laundry income
- Service fees
- Other property income
(Usually adjusted for vacancy and credit losses.)
2. Operating Expenses
The costs required to operate and maintain the property, such as:
- Property management fees
- Repairs and maintenance
- Insurance
- Property taxes
- Utilities paid by the owner
- Cleaning and landscaping
- Maintenance contracts
Not included in NOI:
- Mortgage payments
- Loan interest
- Income taxes
- Depreciation
- Owner expenses
Example:
A rental property earns:
- Annual rent income: $120,000
- Other income: $5,000
- Vacancy loss: $5,000
Gross Operating Income = $120,000
Operating expenses:
- Maintenance: $10,000
- Insurance: $3,000
- Property management: $12,000
- Taxes and utilities: $15,000
Total expenses = $40,000
NOI = $120,000 − $40,000 = $80,000
Why use an NOI calculator?
It helps investors:
- Measure property profitability
- Compare investment opportunities
- Calculate capitalization rate (cap rate) Cap Rate=Property ValueNOI
- Estimate a property’s value based on income potential
In short, a Net Operating Income Calculator shows how much profit a property produces from its operations before debt and taxes are considered.