What Is Net Operating Income in Real Estate?

What Is Net Operating Income? 

Net operating income (NOI) is the amount of income generated by a property after subtracting all operating costs — but before accounting for income taxes, financing costs, or capital expenditures. In short, it reflects how much money your property is making from operations alone. 

Think of it as your property's “business profit” before you factor in things like loans or improvements. 

How to Calculate Net Operating Income 

To calculate NOI, you start with your gross operating income (GOI), then subtract your operating expenses: 

NOI = Gross Operating Income – Operating Expenses 

Gross Operating Income Includes: 

• Rental income (actual or projected) 
• Additional income from the property (laundry machines, parking, etc.) 
• Adjusted for vacancy rates 

Operating Expenses Include: 

• Property taxes 
• Management fees 
• Maintenance and repairs 
• Insurance 
• Utilities (if not paid by tenants) 

Capital expenditures, loan payments, and income taxes are not included when calculating net operating income. 

Why NOI Matters to Property Owners and Investors 

For real estate investors, NOI is a critical figure used to: 

• Evaluate a property's ability to generate income 
• Compare multiple rental properties or real estate investment opportunities 
• Determine capitalization rates (cap rates) 
• Assess value independently of financing 

How Capitalization Rates Use NOI 

The capitalization rate (or cap rate) is a formula that helps investors determine how quickly an investment will pay itself back: 

Cap Rate = NOI ÷ Purchase Price 

Let’s say your property has a net operating income of $50,000 and a purchase price of $625,000: 

Cap Rate = $50,000 ÷ $625,000 = 8% 

This gives you a way to compare this investment to others, based on income generated relative to cost. 

NOI vs. Cash Flow: What’s the Difference? 

It’s easy to confuse NOI with cash flow, but here’s the difference: 

• NOI focuses only on income and expenses directly tied to property operations. 
• Cash flow includes loan payments, capital expenditures, and income taxes, giving you the actual money you pocket. 

If NOI is your property’s health report, cash flow is what you actually bring home. 

Tips for Improving NOI 

Want to improve your NOI? Here are strategies property owners often use: 

• Raise rental income strategically 
• Reduce unnecessary management fees or vendor costs 
• Monitor and control utilities and routine maintenance 
• Minimize vacancy rates through proactive leasing 
• Reevaluate property taxes for possible reassessment 

Even small changes in your operating costs can lead to a noticeable increase in NOI over time. 

Final Thoughts 



Understanding and calculating net operating income is crucial whether you own a single unit or multiple commercial properties. As a property owner or real estate investor, mastering NOI helps you make smarter investment decisions, price your rentals effectively, and increase long-term profitability. 

If you're serious about growing your portfolio or maximizing income from your current rental properties, start with your NOI — it’s the number that tells the real story.