If you've spent any time learning about real estate investing, you've probably heard investors talk about capitalization rate, more commonly referred to as cap rate. It's one of the most frequently cited metrics in real estate, and many investors use it as a quick shorthand for determining whether a property is a good deal. You'll hear statements like, “That property is trading at a 7% cap rate,” or, “I don't buy anything under an 8 cap.” For newer investors, it can sound like capitalization rate is the ultimate measure of a property's quality.

The reality is a little more complicated. Cap rate is certainly an important metric, but honestly I don't really use it regularly when analyzing and managing investment properties. When it comes to measuring returns, I place much more emphasis on cash-on-cash return. Understanding why requires first understanding what cap rate is, how it is calculated, and what it was originally designed to measure.

What Is Capitalization Rate?

At its core, capitalization rate is a measure of the income a property generates relative to its value. It is designed to help investors evaluate the profitability of an investment property without taking financing into account. Without financing is the key phrase there.

The cap rate formula is straightforward: Cap Rate = Net Operating Income (NOI) ÷ Property Value

The resulting number is expressed as a percentage. For example, if a property generates $15,000 in annual net operating income and is worth $250,000, the cap rate would be 6%.

What makes cap rate useful is that it creates a standardized way to compare properties. By removing financing from the equation, investors can evaluate two different properties on a more equal footing. No interest rate or down payment to worry about. Whether one investor pays cash and another finances the purchase with a mortgage, the cap rate remains the same because it focuses solely on the property's operating performance.

To understand cap rate more fully, though, we need to understand net operating income.

Understanding Net Operating Income

Net operating income, or NOI, is the amount of money a property generates after operating expenses have been paid. It starts with the property's gross rental income and subtracts expenses such as property taxes, insurance, maintenance, repairs, management fees, and expected vacancy costs.

One important detail often confuses newer investors: Mortgage payments are not included when calculating NOI. Specifically, you don't consider principal or interest payments as operating expenses for this calculation. This distinction is intentional because cap rate means to evaluate the property itself rather than the financing strategy used to purchase it.

Let's look at a simple example. Imagine a rental property generates $2,000 per month in rent. After accounting for taxes, insurance, maintenance, and other operating expenses, the property produces $1,200 per month in net operating income. Annualized, that works out to $14,400 per year. If the property was purchased for $240,000, the cap rate would be calculated as:

$14,400 ÷ $240,000 = 6%

This means the property generates a 6% return based on its purchase price before considering financing.

How Investors Use Capitalization Rate

One of the reasons cap rate remains so popular is because it allows investors to quickly compare opportunities. If you are evaluating multiple properties in the same market, cap rate can provide a useful snapshot of relative value. Generally speaking, higher cap rates indicate higher potential returns, while lower cap rates suggest lower returns but potentially lower risk.

For example, a newer apartment complex in a highly desirable neighborhood may trade at a lower cap rate because investors are willing to accept lower returns in exchange for perceived stability. On the other hand, a property in a less desirable area may trade at a higher cap rate because investors demand a greater return to compensate for additional risk.

This is why cap rates are often discussed in the context of entire markets. Investors may compare cap rates across cities, neighborhoods, or property types to determine where and what types of opportunities exist. In that sense, cap rate serves as a valuation tool as much as a return metric.

However, while cap rate is excellent for comparing properties, it becomes less useful in my opinion when evaluating the actual performance of your personal investment.

The Limitation of Cap Rate

The biggest weakness of the cap rate metric is that it assumes the investor purchased the property entirely with cash. In the real world, most investors don't buy properties that way.

I certainly don't.

Like many real estate investors, I use financing because leverage allows me to control larger assets with less upfront capital. This is why. When leverage enters the equation, the relationship between cap rate and actual returns begins to break down.

Imagine two investors purchasing the exact same $250,000 property. The first investor pays cash. The second investor puts 20% down (the standard amount for an investment property) and finances the remainder. Both investors own a property with the exact same cap rate because the property's operating performance hasn't changed. However, their actual returns on invested capital may be dramatically different because the amount of money they personally invested is dramatically different.

The cash investor may have invested $250,000. The leveraged investor may have invested only $50,000 plus closing costs. Yet cap rate treats both situations identically.

As investors, we are not simply evaluating properties. We are evaluating how efficiently our invested capital is working. That's where cash-on-cash return becomes much more valuable.

Why I Prefer Cash-on-Cash Return

Cash-on-cash return (CoC) measures the return generated on the actual cash invested into a property. Instead of focusing on the property's total value, it focuses on the investor's capital.

The formula is: Cash-on-Cash Return = Annual Cash Flow ÷ Total Cash Invested

This calculation includes financing, which immediately makes it more relevant for most real-world investors.

Suppose I purchase a $250,000 rental property with a 20% down payment. Including closing costs, I invest $60,000 of my own money. After paying all operating expenses and mortgage payments, the property generates $6,000 per year in positive cash flow.

My cash-on-cash return would be: $6,000 ÷ $60,000 = 10%

This tells me that my invested capital is earning 10% annually. That's the information I care most about when deciding where to allocate my money. I'm not investing based on hypothetical returns generated by an all-cash purchase. I am investing based on the actual dollars leaving my bank account.

For that reason, cash-on-cash return is by far my favorite metric when evaluating rental properties. It provides a much clearer picture of real-world performance and allows me to compare investment opportunities based on how effectively they use my capital. Here is a more detailed breakdown of how to calculate CoC return.

How I Actually Use Capitalization Rate

Despite my preference for cash-on-cash return, I still may use cap rate from time to time. And I definitely still believe all investors should know what it is and what it means. Because it is a huge part of the real estate parlance. Despite CoC being perhaps a better metric, lots of real estate agents and other investors will still talk about cap rate. And you need to know what they are referring to.

The original design of the cap rate metric is to determine property value in its most stripped down sense. This comes particularly in handy when discussing forced appreciation. And forced appreciation is one of the reasons real estate investing is so powerful when it comes to wealth building.

Many people think appreciation is simply the result of waiting for the market to rise. While market appreciation certainly exists, it is largely outside of our control. Forced appreciation, on the other hand, occurs when we actively improve the performance of an investment property.

An investment property is not just a building, it's a business

When you increase revenue, reduce expenses, improve occupancy, or otherwise optimize operations, you increase the profitability of that business. As profitability rises, value rises as well. This relationship can be quantified using cap rate.

By rearranging the cap rate formula, we get:

Property Value = NOI ÷ Market Cap Rate

Suppose a property currently generates $15,000 in annual NOI, and comparable properties in the market trade at a 7% cap rate. The property's estimated value would be roughly $214,000.

Now imagine you improve management, increase rents, and reduce expenses, raising annual NOI to $20,000. Applying the same market cap rate, the property's estimated value jumps to approximately $286,000.

In this example, you created more than $70,000 in value not because the market changed, but because you improved the business. That's the beauty of forced appreciation and one of the most compelling aspects of real estate investing.

The Bottom Line

Cap rate is an essential real estate investing metric due to its popularity in the language of real estate if nothing else. And in fairness, it can provide a useful way to compare properties, evaluate markets, and estimate property values when you know how to use it. Every real estate investor should understand how it works and when it should be applied.

That said, I think investors overemphasize cap rate as a measure of investment performance. Because it ignores financing, it frequently fails to reflect the returns that investors actually experience. For investors who use leverage, which is most of us, cash-on-cash return often provides a much more meaningful measure of success.

Ultimately, I use both metrics, but for different purposes. Cap rate helps me understand the property value in the context of the property as a business. Cash-on-cash return helps me understand how effectively my invested capital is working. That's why when I'm deciding whether an investment deserves my money, cash-on-cash return is usually the metric that gets my attention first.

For more resources on starting or optimizing your real estate portfolio, check out these posts:

• Real Estate Investing: Why the Tortoise Beats the Hare
• How To Actually Buy A Real Estate Investment Property
• Real Estate Depreciation: The Powerful Yet Misunderstood Tool for Investors
• How Real Estate Gave Me More Freedom in Medicine

What do you think? Had you heard of capitalization rate? Do you use it as a metric when evaluating investment real estate properties? If so, how do you use it? Do you think it's the best metric to use? Let me know in the comments below!