What Is a Cap Rate and Why Real Estate Investors Use It

Cap Rate Is One of the First Numbers Every Real Estate Investor Learns — Here’s What It Actually Means

If you spend any time evaluating multifamily real estate deals, you’ll encounter the term cap rate within the first five minutes. Sponsors reference it when presenting acquisitions. Brokers use it to price properties. Investors cite it when comparing markets. Cap rate real estate analysis is fundamental to how the entire industry thinks about value.

But what does a cap rate actually tell you — and what doesn’t it tell you? This post explains cap rates clearly, with real examples, so you can use them confidently as part of your deal evaluation process.

The Cap Rate Formula

The capitalization rate — cap rate — is a simple ratio that measures a property’s income relative to its value. The formula is:

Cap Rate = Net Operating Income (NOI) ÷ Property Value

For example, if a 100-unit apartment community generates $800,000 in net operating income annually and sells for $10,000,000, the cap rate is:

$800,000 ÷ $10,000,000 = 8.0% cap rate

That’s it. The cap rate simply expresses how much income a property produces relative to its price — as a percentage. Consequently, you can use it to quickly compare properties of different sizes, in different markets, and at different price points on an apples-to-apples basis.

What Is Net Operating Income (NOI)?

Since cap rate depends entirely on NOI, understanding what goes into that number is essential. Net operating income is the property’s total income minus its operating expenses — before debt service, depreciation, and capital expenditures.

NOI includes:

Gross rental income — all rent collected from tenants
Other income — pet fees, parking, laundry, storage, late fees
Less vacancy and credit loss — an allowance for units that are empty or tenants who don’t pay
Less operating expenses — property management fees, maintenance, insurance, property taxes, utilities, and other recurring costs

Importantly, NOI does not include mortgage payments. The cap rate is a property-level metric — it measures the asset’s performance independent of how it’s financed. This is precisely what makes it so useful for comparing deals across different capital structures.

For a deeper look at NOI and how sponsors use it to drive value, see our upcoming post on net operating income in multifamily investing.

How to Use Cap Rate When Evaluating a Deal

Cap rates serve several practical purposes in deal evaluation. Here are the most important ways passive investors use them:

1. Assessing the Purchase Price

When a sponsor acquires a property, the purchase cap rate tells you what you’re paying relative to current income. A property purchased at a 6.5% cap rate generates $6.50 of NOI for every $100 of purchase price. A property purchased at a 5.0% cap rate generates $5.00 for every $100.

Generally, lower cap rates indicate higher prices relative to income — which typically reflects either a higher-quality asset, a more competitive market, or both. Higher cap rates indicate more income relative to price, which can mean better current cash flow but also potentially more risk or a less desirable asset.

2. Comparing Markets

Cap rates vary significantly by market. In highly competitive coastal markets like Los Angeles or New York, multifamily cap rates often compress to 4–5% because investors accept lower current yields in exchange for strong appreciation potential. In secondary and tertiary markets across the Sun Belt and Mountain West, cap rates frequently range from 5.5–7.5%, reflecting higher current yields and different risk-return profiles.

As a passive investor, understanding the cap rate environment in a deal’s target market helps you contextualize the sponsor’s acquisition price and exit assumptions. A sponsor buying at a 6.0% cap rate in a market where comparable properties trade at 5.5% is getting a relative discount. A sponsor buying at 5.5% in a 6.5% cap rate market is paying a premium that requires a specific justification.

3. Projecting Value at Exit

This is where cap rate analysis becomes especially powerful — and where passive investors need to pay close attention. Since property value equals NOI divided by cap rate, a sponsor can increase the property’s value in two ways: grow the NOI, or sell at a lower cap rate than they bought at.

Most value-add business plans focus primarily on growing NOI — through renovations, rent increases, and expense management. However, many proformas also assume the property will sell at a lower cap rate than the purchase cap rate, a phenomenon called cap rate compression. That compression can add millions of dollars to the projected exit value — but it’s not guaranteed.

For example, consider a property with the following trajectory:

Purchased at a 6.5% cap rate with $800,000 NOI → $12.3M value
After value-add, NOI grows to $1,100,000
If sold at the same 6.5% cap rate: $16.9M value — solid appreciation driven by NOI growth
If sold at a 5.5% cap rate: $20.0M value — significantly more, but dependent on market conditions

When reviewing a sponsor’s proforma, always identify what exit cap rate they’re assuming and whether that assumption is realistic given current market conditions. A deal that only works at a substantially compressed exit cap rate carries more risk than one that performs well even if cap rates stay flat or expand slightly.

Cap Rate vs. Cash-on-Cash Return: What’s the Difference?

New investors sometimes confuse cap rate with cash-on-cash return. They measure related but different things.

The cap rate measures property-level income relative to value — ignoring financing entirely. It’s a tool for evaluating the asset itself.

The cash-on-cash return measures the actual cash you receive as an investor relative to your equity contribution — after accounting for debt service. It reflects the impact of leverage on your personal return.

Here’s a simple example using the same property:

Property value: $10,000,000
NOI: $700,000
Cap rate: 7.0%
Senior debt: $7,000,000 at 5.5% interest → annual debt service of approximately $475,000
Cash flow after debt service: $225,000
LP equity contributed: $3,000,000
Cash-on-cash return to equity: $225,000 ÷ $3,000,000 = 7.5%

In this case, leverage actually improved the cash-on-cash return above the cap rate — because the borrowing cost (5.5%) was lower than the cap rate (7.0%). This is called positive leverage, and it’s one of the reasons debt amplifies returns in real estate when used correctly.

However, if interest rates rise and the borrowing cost exceeds the cap rate, leverage becomes negative — meaning debt service consumes more cash than the yield differential supports, and cash-on-cash returns fall below the cap rate. This dynamic is one of the primary reasons rising interest rates create stress for heavily leveraged multifamily deals.

What Cap Rate Doesn’t Tell You

Cap rate is a powerful tool, but it has meaningful limitations that every investor should understand:

It’s a snapshot, not a trajectory. The cap rate reflects current NOI — not stabilized NOI after renovations or lease-up. A value-add property acquired at a 5.5% cap rate on current income might reach a 7.5% cap rate on stabilized income after the business plan executes. That stabilized cap rate — sometimes called the “going-in cap rate on stabilized NOI” — is often more relevant than the day-one cap rate.
It doesn’t account for capital expenditures. A property with deferred maintenance may show strong NOI today but require significant capital investment that isn’t reflected in the cap rate.
It doesn’t reflect financing. Two deals with identical cap rates can have very different LP returns depending on their debt structure, leverage level, and interest rate.
It depends entirely on the quality of the NOI figure. If a sponsor uses an inflated NOI — by understating vacancy, excluding certain expenses, or projecting above-market rents — the resulting cap rate will be artificially low, making the purchase price look more attractive than it actually is.

As a result, always ask the sponsor how they calculated the NOI used in their cap rate analysis — and specifically whether it reflects current actual income or projected stabilized income.

Cap Rates in Today’s Market

Cap rates move inversely with property values and in rough correlation with interest rates. When interest rates rise — as they did sharply in 2022 and 2023 — cap rates tend to expand (meaning values fall) as buyers demand higher yields to compensate for higher borrowing costs. When rates fall, cap rates often compress as capital flows back into real estate.

Understanding where cap rates stand in your target market relative to historical norms helps you evaluate whether a deal is acquiring at a reasonable price or at the peak of a cycle. At High Country Capital Partners, we evaluate every acquisition against current market cap rates and underwrite exit scenarios conservatively — assuming cap rates stay flat or expand slightly rather than projecting compression.

How High Country Capital Partners Uses Cap Rate Analysis

At High Country Capital Partners, cap rate analysis is one of several tools we use to evaluate acquisitions — alongside NOI growth potential, comparable rent analysis, and stress-tested exit scenarios. We focus on deals where the value-add business plan drives meaningful NOI growth, so our projected returns don’t depend on cap rate compression to be compelling.

We share our underwriting assumptions transparently with every investor before they commit capital, including our purchase cap rate, our stabilized cap rate projection, and our exit cap rate assumption. If you’d like to understand how we evaluate deals in detail, browse our portfolio, review our FAQ, or join our investor list to be notified when new opportunities arise.

Keep Learning

Cap rate is one of several key metrics passive investors use to evaluate multifamily deals. These posts cover the others:

And when you’re ready to explore a real investment opportunity, we’d love to connect. Reach out to the HCCP team — no pressure, just a straightforward conversation about whether passive multifamily investing is the right fit for your goals.