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Loading...Loading...Net operating income (NOI) is the total revenue a rental or investment property brings in minus its operating costs. Investors and lenders use NOI to figure out how profitable a property is before taxes and debt service.
Net operating income, or NOI, is a way to figure out how much money a property that makes money makes from its daily activities. You could say it's the financial heartbeat of your property. It cuts through the noise of tax situations and financing decisions to answer one simple question: is this property making money by itself?
The formula is easy to understand. You get your NOI by taking all the money the property makes and subtracting the costs of running it. Rent is the main source of income for most properties, but you could also include money from pet fees, parking fees, laundry facilities, storage rentals, or other services. On the expense side, the owner pays for property taxes, insurance premiums, repairs, property management costs, and utilities.
What doesn't go in is just as important as what does. How much do you pay for your mortgage? Not included. Big projects that cost a lot of money, like putting on a new roof or fixing the plumbing? Those don't count either. Taxes on income and depreciation are also not included. The reason is simple: NOI is meant to measure the property itself, not the owner's finances or how they paid for it.
Why do you care about this? NOI is one of the first numbers you'll want to look at if you're thinking about buying a rental property. It helps you find out if a property can really pay for itself. Your lender will also look closely at NOI if you are applying for a loan for an investment property. It's a big part of their decision about whether or not to give you money.
Calculating NOI comes down to two pieces: total income and total operating expenses. Let’s walk through both.
Your total income starts with rent. If you own a four-unit building and each unit rents for $1,200 a month, your gross rental income is $57,600 a year. But you’d also add in anything else the property earns. Maybe you charge $50 per month for covered parking spots and have eight tenants using them. That’s another $4,800 annually. A coin-operated laundry room might bring in $1,800 a year. So your total potential income in this example is $64,200.
Now, here’s the part that trips people up. You can’t just assume every unit stays rented every month. Even in a relatively healthy rental market, you should expect some gaps. For our example, let’s assume a 5% vacancy rate, which brings your effective gross income down to $60,990.
Next, you subtract operating expenses. For a four-unit property, those might look something like this in a given year: property taxes at $4,800, insurance at $2,400, property management fees at $6,099 (roughly 10% of effective gross income), maintenance and repairs at $3,600, utilities the owner covers at $2,100, and miscellaneous costs like landscaping and pest control at $900. That’s $19,899 in total operating expenses.
So your NOI would be $60,990 minus $19,899, which comes to $41,091 per year. That’s the number that tells you, and your lender, whether this property is pulling its weight financially.
Getting your NOI right depends on knowing exactly what belongs in the calculation and what doesn’t. Mixing these up is one of the most common mistakes new investors make.
Rental income is the foundation, but the IRS considers several other types of receipts as taxable rental income, and most of these also count toward your NOI. That includes late fees, application fees, parking revenue, laundry income, storage fees, and any services you provide to tenants for a charge. If a tenant pays one of your expenses directly, say they cover a utility bill, that counts as income too.
These are the recurring costs of keeping a property up and running. The IRS lists common deductible rental expenses that overlap heavily with what counts against NOI: property taxes, insurance, maintenance and repairs, property management, utilities paid by the owner, landscaping, pest control, and legal or accounting fees related to the property.
AmeriSave works with plenty of borrowers who own or want to own investment properties, and one thing our team sees come up a lot is confusion about property management fees. Whether you manage the property yourself or hire a company, most investors account for management costs at 8% to 12% of collected rent when calculating NOI.
This is where NOI differs from your actual cash flow or profit. The following items are excluded from NOI: mortgage principal and interest payments, capital expenditures (like a new roof, HVAC system, or full renovation), income taxes, depreciation and amortization. The logic behind these exclusions is that NOI measures the property’s earning power independent of how you financed it or how the tax code treats it. Two investors can own the exact same building, one with a big mortgage and one who paid cash, and the NOI stays identical.
NOI isn’t just an academic exercise. It’s the building block for some of the most important decisions in real estate investing.
Comparing properties. Because NOI strips out financing, you can line up two different properties and see which one performs better operationally. A duplex in the Midwest earning $28,000 in NOI and a triplex on the coast earning $42,000 in NOI are suddenly comparable, even though they’re in completely different markets with different price points.
Qualifying for a loan. Lenders use NOI to calculate something called the debt service coverage ratio, or DSCR. That’s your NOI divided by your annual mortgage payments. Most lenders want to see a DSCR of at least 1.2 to 1.25, meaning the property earns 20% to 25% more than what the loan payments require. If you’re applying for an investment property loan through AmeriSave, your NOI is going to be a central part of that conversation.
Estimating property value. The income capitalization approach, one of the standard methods appraisers and investors use, calculates a property’s value by dividing NOI by the cap rate. If your property has an NOI of $41,091 and similar properties in the area are trading at a 7% cap rate, the estimated value would be $41,091 divided by 0.07, or roughly $587,014.
You may have heard the term "cap rate" if you've ever looked at investment properties. It means capitalization rate, and it's just NOI shown as a percentage of the property's market value or purchase price.
The formula for cap rate is NOI divided by property value. So, a building with a market value of $625,000 and a NOI of $50,000 per year has a cap rate of 8%. The cap rate for another building with the same NOI but a market value of $1,000,000 is 5%.
What does that mean to you? Higher cap rates usually mean higher possible returns, but they also come with more risk. Lower cap rates usually mean that the property is in a good location and is more stable and well-established. Neither one is automatically better. Your goals, how much risk you're willing to take, and how long you have to wait all play a role.
You can also use the formula in the opposite way to guess how much a property might be worth. To get an estimated value, you divide the NOI by the going cap rate for similar properties in that area. That's why raising rents or cutting costs to improve NOI can directly raise the value of your property.
Let’s say you’re considering buying a small apartment building with six units. Each unit rents for $975 per month. You’ve done your homework and here’s what the numbers look like.
Gross rental income: 6 units at $975 per month equals $70,200 per year. Additional income from laundry and a small storage area adds $3,000 annually. That’s a potential gross income of $73,200.
You build in a vacancy allowance. Fannie Mae’s selling guide notes that lenders typically apply a 25% expense factor when calculating net rental income from properties, which accounts for vacancies, maintenance, and other costs. For this example, let’s use a more conservative 7% vacancy rate based on recent national data from the Census Bureau. That reduces your effective gross income to $68,076.
Annual operating expenses break down as follows: property taxes $6,300, insurance $3,100, property management at 10% of collected rent equals $6,808, repairs and maintenance $4,200, common area utilities $2,600, landscaping and snow removal $1,500, and miscellaneous $800. Total operating expenses come to $25,308.
Your NOI: $68,076 minus $25,308 equals $42,768.
Now you can take that one step further. If the asking price for this building is $550,000, your cap rate would be $42,768 divided by $550,000, or about 7.8%. Whether that’s a good deal depends on what other properties in the area are selling for, but it gives you a concrete starting point for your analysis.
AmeriSave’s loan officers can help you run through numbers like these when you’re exploring investment property financing options.
I’ve been in the mortgage industry long enough to see the same errors come up over and over. Here are the ones that cause the most trouble.
Forgetting vacancy allowance. Even great properties sit empty sometimes. Tenants move out. Leases don’t always renew. If you plug zero vacancy into your NOI, you’re painting an unrealistic picture.
Including mortgage payments. This is probably the most frequent mistake. Your loan payment is not an operating expense. Lumping it in with insurance and property taxes will give you a number that’s not NOI at all.
Mixing up repairs and capital expenditures. Fixing a leaky faucet? That’s maintenance, and it counts against NOI. Replacing the entire plumbing system? That’s a capital expense, and it stays out. The line between the two isn’t always obvious, so when in doubt, ask your accountant.
Relying on the seller’s numbers. Look, sellers want to make their property look as profitable as possible. Always verify the income and expenses independently. Check actual rent rolls, utility bills, tax assessments, and insurance quotes for yourself.
NOI isn't set in stone once you own a property. You can either raise your income or lower your costs. Most investors who do well work on both sides.
To make more money, you could raise rents to match what other landlords are charging, add amenities that cost money, like covered parking or laundry in the unit, keep good tenants happy to cut down on turnover, or turn unused space into storage that you can rent out. It also makes a big difference when vacancies are shorter. Even if you cut the time between tenants from 30 days to 15 days, it still adds up.
To save money, check your insurance coverage (you might be paying too much), negotiate property management fees, make energy-efficient upgrades that lower your utility bills, and take care of small repairs before they turn into big ones. Getting the right financing structure from a lender like AmeriSave won't directly change your NOI, but it can help your cash flow and give you more money to make improvements to your property that will.
Net operating income is a quick way to learn a lot about a property. It shows if a rental property makes enough money to pay for itself, helps you compare deals in different markets, and is directly used by lenders to decide whether to approve your investment property loan application. It's not the only number that matters, but it's the one that most other numbers are based on. If you're ready to start crunching the numbers on an investment property, AmeriSave can help you get started with a prequalification and show you all the ways you can finance it.
NOI is the difference between total property income and total operating costs. Total income is the money that comes in from rent, parking fees, laundry, and any other property-related income, minus any losses from empty units. Property taxes, insurance, management fees, maintenance, and utilities that the owner pays are all part of operating costs. Excluding mortgage payments, capital expenditures, and income taxes. The NOI would be $45,000 for a property that makes $70,000 a year in rent and has $25,000 in operating costs. When you're looking at an investment property, AmeriSave's mortgage calculator can help you compare the NOI to the possible loan payments.
No, NOI looks at how well a property is doing before taking into account mortgage payments, capital expenses, and income taxes. Profit, or net income, is what you get after you take away all of those extra costs. A property can have a strong NOI of $50,000 a year but still have negative cash flow after paying off a $48,000 mortgage each year. When looking at a property, NOI and profit are used for different things. Look into different types of loans for investment properties to see how your NOI affects the total cost of your loan.
Lenders use NOI to figure out the debt service coverage ratio (DSCR), which tells them if a property makes enough money to pay its loan payments. A DSCR of 1.2 or higher is required by most lenders. This means that the property's NOI is at least 120% of the annual debt service. The DSCR of a property with $60,000 in NOI and $45,000 in annual loan payments is 1.33, which is good. AmeriSave can help you get prequalified and explain how the NOI of your property affects your ability to get a loan.
No, and this is the most common mistake people make about NOI. Payments on the principal and interest on a mortgage are not operating costs; they are financing costs. NOI is meant to look at how well the property is running without taking into account how it was bought. Two investors who own the same property but have different types of loans would come up with the same NOI. Check out AmeriSave's mortgage rates to see how the current cost of borrowing compares to your property's expected NOI.
There isn't one "good" NOI that works for all properties; it depends on how much the property is worth and where you live. Instead, investors usually look at the cap rate, which is the NOI divided by the price of the property. Cap rates for residential investment properties are usually between 5% and 10%. Rates are higher in secondary markets and lower in major cities. The cap rate for a property worth $400,000 with a $32,000 NOI is 8%. The learning center at AmeriSave has tools to help you figure out if a property is a good investment.
Vacancy lowers your effective income, which lowers NOI. A 7% vacancy allowance lowers the effective income of a property that could rent for $80,000 a year by $5,600. Vacancies that are higher than expected can turn a good investment into a loss. The AmeriSave team can help you get prequalified and take into account local vacancy trends when you look at your investment.
NOI is a real estate term that looks at how well a property is doing at the operating level. EBITDA (earnings before interest, taxes, depreciation, and amortization) is a more general business measure that includes costs that aren't related to property and are at the corporate level. When it comes to a single rental property, the two numbers are usually about the same. But for bigger real estate companies that manage multiple assets, EBITDA includes costs that NOI does not. If you're thinking about buying a house, check AmeriSave's current mortgage rates to get the full picture of your investment.
Yes. You can boost NOI by bringing rents up to market levels, adding income streams like paid parking or storage, and keeping tenants longer to lower vacancy rates. On the cost side, you can lower your costs by negotiating your insurance premiums, making your utilities more efficient, and shopping around for property management fees. Every little bit helps. If you cut your yearly costs by $3,000 on a property with a 7% cap rate, the value of the property goes up by about $42,857. If your NOI goes up, look into AmeriSave's refinance options to see if they can help you get better loan terms.
The income capitalization approach finds the value of a property by dividing NOI by the market cap rate. If properties like yours sell for a 6.5% cap rate and your property makes $52,000 a year in NOI, the estimated value is $52,000 divided by 0.065, which is about $800,000. Appraisers, investors, and lenders all use this method to value income-producing real estate. The learning center at AmeriSave can help you learn more about the basics of investing in real estate.
Yes. Property taxes are a cost of doing business that lowers your NOI. But income taxes are not included. This difference is important because property taxes are based on the property itself, no matter who owns it, while income taxes are based on the owner's own tax situation. If the property is worth $500,000 and the local tax rate is 1.2%, the property taxes would be $6,000 a year. This amount is taken off when calculating NOI. Use AmeriSave's prequalification tool to include taxes and NOI in your investment planning.
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