What is NOI Calculator?
The NOI Calculator helps investors measure a property's operating profitability.
When to Use This Calculator
- Underwriting a rental property purchase before you calculate cap rate or DSCR
- Comparing the true income-producing potential of two properties independent of financing
- Building next year's operating budget for a property you already own
- Checking whether a proposed rent increase or expense cut meaningfully moves the property's income
- Valuing a property using the income approach (NOI ÷ market cap rate)
- Reporting a property's operating performance to a lender, partner, or appraiser
Steps:
- Enter gross rental income.
- Input other income and operating expenses.
- View NOI.
Formula
NOI = Gross Rental Income + Other Income − Operating Expenses
Operating Expenses include: property management, insurance, taxes, repairs, utilities, HOA fees, vacancy allowance
Example: $60,000 Rent + $5,000 Other − $25,000 Expenses = $40,000 NOI
NOI is used to calculate Cap Rate, DSCR, and Cash-on-Cash Return.
Use Cases
- Property analysis
- Valuation
- Investment comparison
Key Benefits
- Get accurate noi calculator results instantly
- Save time with noi calculator calculations
- Make informed decisions with clear data
- Free on any device no downloads
Pro Tips
- Double-check inputs for accuracy
- Run multiple scenarios
- Combine with other tools
Common Mistakes to Avoid
- Using inaccurate inputs
- Ignoring key factors
- Misinterpreting outputs
Key Terms Explained
- Input: Values you provide
- Output: Results computed
- Formula: Method used
- Result: Calculated answer
Related Concepts
- Cap Rate: Once you know a property's NOI, dividing it by the purchase price (or market cap rate) gives you the property's return or implied value. Use our cap rate calculator to take the next step after calculating NOI.
- Debt Service Coverage Ratio (DSCR): Lenders divide NOI by your annual mortgage payment to determine whether a property qualifies for financing. Check whether your NOI clears a lender's minimum with our DSCR calculator.
- Cash Flow vs NOI: NOI is calculated before the mortgage payment, while cash flow is what remains after it — the two numbers tell different stories about the same property. Our rental property calculator shows both side by side.
- Operating Expense Ratio: The share of income consumed by operating expenses is a useful sanity check on your NOI calculation — unusually high or low expense ratios compared to similar properties are worth investigating. Our cash flow forecast calculator can help project these expenses forward.
- Property Valuation: Because Property Value = NOI ÷ Cap Rate, small changes in NOI can meaningfully move a property's estimated value — which is why raising NOI (through rent increases or expense control) is one of the most direct ways to build value in an income property.
Example
With $60K rental income, $5K other income, and $25K expenses, NOI is $40K.
Interpreting Your Results
Net operating income is a property's total income minus its operating expenses — but deliberately before mortgage payments, income taxes, or depreciation, which makes it a pure measure of how the property itself performs, independent of how it's financed or who owns it. This is exactly why NOI is the number lenders and appraisers use to value income property (Property Value = NOI ÷ Cap Rate) instead of net cash flow after debt service. A rising NOI year over year is the clearest sign a property is being managed well and is worth more; a flat or falling NOI despite rent increases usually means operating expenses are creeping up faster than income. When comparing two properties, always compare NOI, not gross rent — a property with higher rent but much higher operating expenses can have lower NOI, and therefore lower real value, than one with modest rent and tight expense control.