Net Operating Income (NOI) Calculator
Find a rental property's net operating income.
Enter your values
Enter the gross monthly rent in $.
Enter the other monthly income (parking, laundry) in $.
Enter the vacancy rate in %.
Enter the annual operating expenses in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Effective gross income
- $52,452.00
- Operating expenses
- $14,000.00
- Net operating income
- $38,452.00
- NOI margin
- 73.31%
Quick answer
Net operating income is a property's income after operating expenses and vacancy, but before mortgage payments, capital expenditures, and taxes on the owner's return.
NOI = effective gross income - operating expenses
At a glance
| What it does | Find a rental property's net operating income. |
|---|---|
| Category | Real Estate |
| Inputs needed | Gross monthly rent, Other monthly income (parking, laundry), Vacancy rate, Annual operating expenses |
| Main output | Effective gross income |
| Formula | NOI = effective gross income - operating expenses |
| Cost | Free — no sign-up, no download |
How to use the Net Operating Income (NOI) Calculator
- 1Enter gross monthly rent and any other property income.
- 2Apply a realistic vacancy rate.
- 3Subtract all annual operating expenses (taxes, insurance, maintenance, management) — but not debt service.
Inputs explained
- Gross monthly rent($)
- Enter the gross monthly rent in $.
- Other monthly income (parking, laundry)($)
- Enter the other monthly income (parking, laundry) in $.
- Vacancy rate(%)
- Enter the vacancy rate in %.
- Annual operating expenses($)
- Enter the annual operating expenses in $.
Worked example
Using the values the calculator loads with:
Inputs
- Gross monthly rent4500 $
- Other monthly income (parking, laundry)150 $
- Vacancy rate6 %
- Annual operating expenses14000 $
Results
- Effective gross income$52,452.00
- Operating expenses$14,000.00
- Net operating income$38,452.00
- NOI margin73.31%
Frequently asked questions
Does NOI include mortgage payments?
No — NOI is calculated before debt service, so it can be compared across properties regardless of financing.
What expenses are excluded from NOI?
Mortgage principal and interest, capital expenditures, and income taxes are excluded from operating expenses.
What do I need to enter into the Net Operating Income (NOI) Calculator?
Just 4 values: gross monthly rent, other monthly income (parking, laundry), vacancy rate, annual operating expenses. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Net Operating Income (NOI) Calculator work out the answer?
Net operating income is a property's income after operating expenses and vacancy, but before mortgage payments, capital expenditures, and taxes on the owner's return. It applies the formula NOI = effective gross income - operating expenses and shows the working so you can check each step by hand.
Is the Net Operating Income (NOI) Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.