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Noi

By Momin Ali Agha3/12/2026

What is NOI & Why Does It Matter?

Net Operating Income (NOI) is a critical metric for real estate investors, as it represents the income generated by a rental property after deducting operating expenses. NOI is essential for evaluating a property's profitability, making informed investment decisions, and comparing the performance of different properties. By calculating NOI, landlords and investors can assess the financial health of their rental properties and identify areas for improvement.

How to Calculate NOI (The Formula)

The NOI formula is:

NOI = Gross Operating Income - Operating Expenses

Where:

  • Gross Operating Income = Rental income + Other income (e.g., parking, laundry)
  • Operating Expenses = Property taxes + Insurance + Maintenance + Repairs + Utilities + Property management fees + Other expenses

Step-by-Step Practical Example

Let's calculate the NOI for a rental property:

  • Gross Operating Income: $120,000 (rental income) + $5,000 (other income) = $125,000
  • Operating Expenses:
    • Property taxes: $15,000
    • Insurance: $3,000
    • Maintenance: $8,000
    • Repairs: $2,000
    • Utilities: $4,000
    • Property management fees: $6,000
    • Other expenses: $1,000 Total Operating Expenses: $39,000
  • NOI: $125,000 (Gross Operating Income) - $39,000 (Operating Expenses) = $86,000

What is a "Good" NOI? (Industry Benchmarks)

A good NOI depends on various factors, including the property type, location, and market conditions. However, here are some general guidelines:

  • For residential properties, a NOI of 50-70% of gross operating income is considered good.
  • For commercial properties, a NOI of 60-80% of gross operating income is considered good.
  • Aim for a minimum NOI of 20-30% to ensure a decent return on investment.

Common Mistakes to Avoid

When calculating NOI, avoid these common mistakes:

  • Failing to account for all operating expenses: Make sure to include all expenses, including property management fees and other miscellaneous expenses.
  • Using inaccurate or outdated expense data: Regularly review and update your expense data to ensure accuracy.
  • Not considering capital expenditures: While not included in NOI calculations, capital expenditures (e.g., renovations, upgrades) can significantly impact a property's profitability.

Frequently Asked Questions (FAQ)

Q: What is the difference between NOI and cash flow?

A: NOI represents the income generated by a property after deducting operating expenses, while cash flow represents the actual cash available for distribution after deducting all expenses, including debt service and capital expenditures.

Q: How does NOI affect property value?

A: NOI is a key factor in determining a property's value. A higher NOI generally translates to a higher property value.

Q: Can NOI be negative?

A: Yes, NOI can be negative if operating expenses exceed gross operating income. This can occur if a property is underperforming or if expenses are not properly managed.

Q: How often should I calculate NOI?

A: Calculate NOI regularly, ideally quarterly or annually, to monitor a property's financial performance and make informed investment decisions.

About the Author: Momin Ali Agha

Momin is the founder of Best Rent Management, building free tools for the real estate investment community. With a focus on financial precision and accessibility, he aims to simplify complex property metrics for everyone.

Learn more about the vision →