2019: How to Calculate the Cap Rate Calculator for Your Investments


First of all, a common way of calculating this return on an investment is by using the Cap Rate (short for capitalization rate, commonly called the Cap Rate or CAP). Defined by Investopedia as “the rate of return on a real estate investment property based on the income that the property is expected to generate,” the Cap Rate estimates an investor’s annual return on their investment. What’s more, Investopedia provides the following formula for calculating Cap Rate, which is typically used for commercial real estate Cap Rate calculations:


Capitalization Rate = Net Operating Income (NOI) / Current Market Value

First of all, you must know the Net Operating Income (NOI). In effect, NOI shows investment property’s total positive generated income. Specifically, NOI is what’s you have after paying Operating Expenses (variable costs and fixed costs) from Gross Income. For example, here is a formula:

NOI = Gross Income – Operating Expenses

How to Find Cap Rate with NOI

As stated above Cap Rate is an estimate of your annual return on a specific investment (ROI). The main reason for using the Cap Rate calculation is that it helps you determine a real estate investment’s profitability. Basically, Cap Rate shows how an asset’s NOI relates to the property’s value.

As seen in the example above, one of the most important figures you need to determine Cap Rate is an asset’s operating expenses. Some examples of operating expenses include taxes, insurance, property management costs, and maintenance costs. Once you’ve totaled your operating expenses, you can then calculate the Cap Rate.

For example, maybe you want to purchase an apartment complex. Each month, the residents pay rent to live on the property. At the same time, each month, you’ll be responsible for the complex’s operating expenses. In this specific example, the property’s NOI would be the rents paid by tenants minus the apartment complex’s expenses.

At the end of the month (or year), it’s helpful to know how much money you’ll have after paying all the expenses. In a very simplified way, that is the most important number you need to know. Once you’ve invested in the property, what will the profit be? As a result, using NOI to find the Cap Rate is an effective ‘back of the napkin’ calculation for finding an asset’s profitability.

A Practical Example: Cap Rate NOI Calculator

If you know a property’s NOI, then you can then calculate the Cap Rate from the NOI. In order to clarify this, we offer a practical example below of the Cap Rate formula in action. To explain, if you purchase a building at the Current Market Value of $1M and this investment creates $100,000 of annual NOI, then this formula is true:

$100,000 / $1,000,000 = 0.10 (10%)

In this example, the Cap Rate is 10%. In other words, you pay one-tenth of the property value’s total cost with that year’s NOI.

Cap Rate: an Indication of Property Value

Basically, Cap Rate is the percentage of annual return you could expect to receive on a cash purchase. At the same time, this extremely simple formula doesn’t account for other things. In general, when you compare two or more investment properties, a lower Cap Rate points to higher property values. What’s more, the opposite is also true – higher Cap Rates often indicate lower property values. In order to help you understand this, below are two equations:


Calculations Example: Office Buildings

If the NOI is not published for a certain property, a licensed commercial real estate agent can help you find that information.

In order to help you understand ROI in a more concrete way, let’s use office buildings. For example, to calculate office building Cap Rates, use the NOI of comparable office properties along with the recent selling prices of commercial properties. Also, if you know a property’s income, this lets you determine its value more accurately.

For instance, office buildings in Houston’s upscale Uptown Galleria submarket lease for much more than offices located in the nearby Southwest Freeway office submarket.

Yet be aware that NOI’s aren’t always published. If you can’t find the NOI for a property isn’t published, then a commercial real estate agent can help you uncover that information. Additionally, you can get sales data on comparable properties from reports provided by a local agent. What’s more, investors like you can get sales data from the local tax office.

After accounting for an office building’s expenses, you then arrive at a solid comparison between similar properties. In the end, this comparison of properties will show discrepancies in property costs (either real or perceived). As The Balance says, “When two properties seem just alike and one costs more, it could be because it is generating more income or has lower expenses.”

Is There an Ideal Cap Rate?

Twenty years ago, investors could expect a 10% Cap Rate for commercial investments. However, these days that number is more or less a dream. Since 2002, the average Cap Rate for multifamily properties in both major and minor markets have steadily fallen. For example, in 2002, Cap Rates hovered around 8%. Yet by Q3 2018, rates had declined to around 5%.

Reasons to Use Cap Rate

Without a doubt, there are other ways to value potential investments like the price per unit, Gross rent multiplier (GRM), and the 1% rule. However, Cap Rate is frequently a quick, easy way to estimate value with advantages over other methods. Apart from being widely used metric, in general, Cap Rate:

  • includes revenue and expenses
  • reflects supply and demand for a certain type of asset in a specific at a given time.
  • reflects the asset grade
  • may be connected to the debt’s interest rate

Reasons Not to Use Cap Rate

As we’ve seen above, Cap Rate is a simple and useful calculation. Specifically, it lets you quickly size up a commercial real estate property. However, in some scenarios, the Cap Rate isn’t as useful.

For example, if the property’s NOI is either irregular or complex (or both), Cap Rate probably isn’t be the best option. In that case, using a discounted cash flow (DCF) analysis would better account for these complexities and irregularities. So although the Cap Rate gives you a quick ‘back-of-the-napkin’ calculation, it may not represent the property as accurately as other calculations.

Is Cap Rate Different from ROI?

Yes. In general, Cap Rate is useful for comparing properties. On the other hand, ROI (return on investment) is useful for analyzing individual properties. The ROI is the overall rate of return on a property including debt and cash invested.

Unlike Cap Rate, ROI takes the debt on the property into consideration. Specifically, ROI accounts for your out-of-pocket costs (down payment, closing costs, improvements, and other costs of purchasing the property). Overall, 10% is a good ROI for investment properties. Be aware that can seem larger if you mortgage a property. Below is the formula for calculating ROI:

ROI = Annual Return / Total Investment x 100

This formula represents your ROI as a property’s annual cash flow divided by the equity you have in the property.

Real-world Example

Imagine you plan to purchase a property for $250,000 and the annual return is $35,000. Using the formula, here’s how to calculate ROI:

$35,000 / $250,000 x 100 = 14%

In this scenario, you would have a 14% ROI on your investment property making it a solid investment. At the same time, if you’re searching for the highest return, it is beneficial to also consider the ROI of other nearby properties.


Updated for 2019: Whenever an investor is looking to purchase a commercial property, they want to know its potential income. Regardless of whether it’s an office space, commercial retail space, or an apartment complex, having a solid idea about the investment’s return is crucial. Futhermore, this is especially true when comparing similar properties. As a result, we’ve updated this ‘Calculate the Cap Rate’ page for 2019. Moreover, we’d added the above calculator for commercial real estate investors like you to use.

Calculating Cap Rate & NOI as a Guide to Office Building Investment

In conclusion, determining the value of an office building for investment purposes might seem complicated. However, by calculating the Cap Rate and NOI, you can obtain a fairly accurate value.

Want to Know More? Let CXRE Help!

If you still have questions about Cap Rate and want to know more, contact one of CXRE’s commercial real estate experts today. We’d be happy to help you understand so that you can maximize your investment potential.

Share This

CXRE » Commercial Real Estate Investment » Updated for 2019: Calculate the Cap Rate and NOI of an Office Building