What Is NOI in Real Estate? A Guide for Investors

What Is NOI in Real Estate?

NOI stands for Net Operating Income.

It is a measure of the income a property generates from its normal operations after operating expenses but before debt service and certain other items.

A simplified formula is:

NOI = Operating Income − Operating Expenses

NOI is particularly important when analyzing rental and commercial real estate because it helps investors and lenders understand the property's operating performance.

How Do You Calculate NOI?

Suppose a rental property generates:

$120,000 annual rental income

and has:

• $15,000 taxes
• $8,000 insurance
• $7,000 maintenance
• $10,000 management
• $5,000 other operating expenses

Total operating expenses:

$45,000

Therefore:

$120,000 − $45,000 = $75,000 NOI

The property's NOI is approximately $75,000.

What Is Included in NOI?

Typical operating expenses may include:

• Property taxes
• Insurance
• Property management
• Repairs
• Maintenance
• Utilities paid by the property owner
• Landscaping
• Certain association expenses
• Other normal property operating expenses

The precise treatment of expenses can vary depending on the property, lender, appraisal, and underwriting methodology.

What Is NOT Included in NOI?

One of the most important things to understand is that NOI is not the same as cash flow after financing.

Debt service generally isn't deducted when calculating NOI.

For example:

NOI = $75,000

Annual mortgage payments = $50,000

Approximate cash flow before other investor-specific expenses:

$25,000

The $25,000 is not the NOI.

The NOI remains $75,000.

NOI vs. Cash Flow

This distinction causes considerable confusion among new investors.

NOI

Measures the property's operating performance.

Cash Flow

Measures what remains after financing and other applicable cash expenses.

A property can have a strong NOI but poor cash flow if it carries substantial debt.

Conversely, a property with modest NOI may produce acceptable cash flow if it has very little debt.

Why Lenders Care About NOI

NOI becomes particularly important as properties move into commercial financing.

Belsky Mortgage's current FAQ explains that larger commercial properties can be evaluated using actual rental revenues and actual expenses to determine NOI, which is then used in the debt-service calculation.

That's very different from simply looking at a borrower's salary.

The property itself becomes a major part of the credit analysis.

NOI and Property Value

NOI can also be used in a capitalization-rate calculation.

The simplified formula is:

Value = NOI ÷ Cap Rate

For example:

NOI = $100,000

Cap rate = 8%

Estimated value:

$100,000 ÷ .08 = $1,250,000

This is a simplified example and actual property valuation involves many additional factors.

But it demonstrates why NOI is so important to commercial real estate investors.

NOI and DSCR

NOI also connects directly to debt-service coverage.

For larger commercial properties, a simplified DSCR calculation may look like:

DSCR = NOI ÷ Annual Debt Service

If NOI is:

$150,000

and annual debt service is:

$120,000

then:

DSCR = 1.25

This means the property generates approximately 1.25 times the annual debt service.

Why Investors Should Track NOI Over Time

NOI isn't just a number you calculate when purchasing a property.

Track it throughout ownership.

Changes in:

• Rent
• Vacancy
• Insurance
• Taxes
• Maintenance
• Management expenses

can cause NOI to increase or decrease.

That can affect both property value and future financing opportunities.

Frequently Asked Questions

What does NOI stand for?

NOI stands for Net Operating Income.

Is NOI the same as cash flow?

No. NOI measures property operating income before debt service. Cash flow generally reflects what remains after financing and other applicable expenses.

Is mortgage interest included in NOI?

Generally, debt service is not deducted when calculating NOI.

Why is NOI important for commercial real estate?

NOI helps measure property performance and can be used in valuation and debt-service calculations.

Can NOI affect how much I can borrow?

Yes. For many commercial financing structures, NOI is an important component of loan sizing and debt-service analysis.

Final Thoughts

If you're serious about real estate investing, know your NOI.

Understanding NOI helps you:

• Evaluate properties
• Compare investments
• Estimate value
• Understand DSCR
• Evaluate financing capacity
• Track property performance

It's one of the most useful numbers in real estate investing.

Learn more about Belsky Mortgage DSCR Loans

Visit the Investor FAQ

Have a property you're evaluating? Submit your deal information through the Belsky Mortgage Quick App.