Cap rates are one of the first numbers investors look at when comparing commercial real estate. They’re useful because they connect a property’s income to its price and give you a quick way to compare opportunities.
But a cap rate doesn’t tell you whether a property is a good investment.
That distinction matters.
In NNN real estate, two properties can have different cap rates because of differences in tenant credit, lease term, location, rent growth, building quality, market conditions and other risks. A higher cap rate may provide more current income relative to price, but it can also reflect risks the market expects you to take.
After more than 40 years in commercial real estate, I’ve learned not to ask whether a cap rate is simply high or low.
I want to know why it is high or low.
That question tells you much more about the investment.
What Is a Cap Rate?
A capitalization rate, usually called a cap rate, expresses the relationship between a property’s net operating income and its value or purchase price.
The basic formula is:
Cap Rate = Net Operating Income ÷ Property Value
The Federal Reserve’s commercial real estate guidance explains that many market participants and analysts use the direct capitalization, or “cap rate,” technique to relate a property’s value to the net operating income it generates. The guidance further explains that the direct capitalization method estimates property value by dividing stabilized annual income by a capitalization rate.
For example, suppose an NNN property generates $300,000 in annual net operating income and sells for $5 million.
$300,000 ÷ $5,000,000 = 6%
The property therefore has a 6% cap rate based on those figures.
You can also rearrange the formula:
Property Value = Net Operating Income ÷ Cap Rate
If the property generates $300,000 in NOI and the applicable market cap rate is 6%, the indicated value would be:
$300,000 ÷ 0.06 = $5,000,000
That relationship between income and value is one reason cap rates matter so much in commercial real estate.
What Does a Cap Rate Actually Tell You?
At its simplest, the cap rate gives you a measure of a property’s current unleveraged income yield relative to its price.
It does not include your mortgage financing, and it isn’t the same as your total return.
That’s important.
A cap rate doesn’t tell you what your cash-on-cash return will be after debt service. It doesn’t predict appreciation. It doesn’t tell you how much money you’ll make when you eventually sell.
It also doesn’t independently tell you whether the tenant will continue paying rent.
What it does give you is a useful starting point for comparing income-producing real estate.
Fannie Mae’s Multifamily Guide defines its underwritten capitalization rate as the ratio of underwritten net cash flow to underwriting value. Fannie Mae also requires capitalization-rate analysis to consider market conditions and property-specific characteristics rather than treating the cap rate as a stand-alone number.
Think of the cap rate as a measurement tool, not an investment verdict.
Why Do Higher and Lower Cap Rates Matter?
All else being equal, a higher cap rate means you’re paying less for each dollar of current NOI. A lower cap rate means you’re paying more.
But in real estate, all else is rarely equal.
Consider two hypothetical NNN properties:
| Factor | Property A | Property B |
|---|---|---|
| Purchase Price | $5,000,000 | $4,285,714 |
| Annual NOI | $300,000 | $300,000 |
| Cap Rate | 6.00% | 7.00% |
| Initial Income per $1M Invested | $60,000 | $70,000 |
At first glance, Property B looks more attractive. You receive more current income for the same amount of invested capital.
Now suppose Property A has a financially strong corporate guarantor, 15 years remaining on its lease, scheduled rent increases and a well-located building with multiple potential future users.
Property B has seven years remaining, flat rent, a weaker guarantor and a specialized building that could be difficult to release.
Now the comparison looks different.
The additional 1% of initial yield may be compensation for taking additional risk.
It still could be a good investment.
But you need to understand what you’re being paid to accept.
Higher yield isn’t free money. Find the risk attached to it.
What Determines an NNN Property’s Cap Rate?
There is no single factor that determines an appropriate cap rate.
Market participants consider multiple characteristics when pricing a property, including:
Tenant and Guarantor Credit
A financially strong tenant or guarantor may reduce perceived income risk and contribute to a lower cap rate.
But verify the entity behind the lease.
A national brand on the building doesn’t necessarily mean the national parent company guarantees the lease.
For public companies, investors can use the SEC’s EDGAR database to review company filings and financial disclosures.
Remaining Lease Term
A property with 15 or 20 years remaining on a lease may be priced differently from one with three or five years remaining.
The shorter the lease gets, the closer the investor gets to a decision point: renewal, renegotiation, vacancy or reletting.
That uncertainty can affect value.
Rent Increases
Contractual rent increases can affect expected future income.
Flat rent for 15 years and regular rent increases over the same period create different economic outcomes, even when both properties start at the same cap rate.
But there’s another side to this.
Aggressive rent increases can eventually push contractual rent above market.
Rent growth is valuable when the real estate can support it.
Location
A strong location can reduce some of the risk associated with future vacancy.
Traffic, visibility, access, demographics, surrounding development, zoning and demand from alternative users all matter.
Remember, the lease has an expiration date.
The land doesn’t.
Building Adaptability
A standard retail building that can accommodate several types of tenants may have a different residual risk profile from a highly specialized property built for one particular operator.
I always want to know:
Who else could use this building if the current tenant leaves?
Market Conditions and Required Returns
Cap rates also reflect broader capital-market conditions and investor return requirements.
Federal Reserve guidance notes that analysts selecting cap rates consider current market requirements for returns on comparable properties and differences involving property location, building characteristics, rental arrangements and financing.
That’s another reason a cap rate shouldn’t be evaluated in isolation.
The number exists within a market.
How Cap Rates Affect Property Value
Because value, NOI and cap rate are mathematically connected, changes in the cap rate used by the market can have a significant effect on indicated property value.
Suppose a property generates $300,000 in NOI:
| Cap Rate | Indicated Value |
|---|---|
| 5.00% | $6,000,000 |
| 5.50% | $5,454,545 |
| 6.00% | $5,000,000 |
| 6.50% | $4,615,385 |
| 7.00% | $4,285,714 |
The income hasn’t changed.
The valuation has.
That’s why exit cap rate assumptions deserve attention when you’re underwriting a long-term investment.
If you buy at a 5.5% cap rate and eventually sell into a market where comparable properties trade at 6.5%, a higher NOI may help offset the valuation effect, but it may not eliminate it.
Nobody knows exactly where cap rates will be when you sell.
Neither do I.
Good underwriting doesn’t pretend we know the future. It asks what happens if our assumptions are wrong.
Cap Rate Compression vs. Cap Rate Expansion
You’ll often hear two terms in commercial real estate.
Cap rate compression means cap rates decline. Assuming NOI stays constant, a lower cap rate results in a higher indicated property value.
Cap rate expansion means cap rates rise. Assuming NOI stays constant, a higher cap rate results in a lower indicated property value.
Using the same $300,000 NOI example:
If the market moves from a 6% cap rate to 5%, the indicated value moves from $5 million to $6 million.
If it moves from 6% to 7%, the indicated value falls from $5 million to approximately $4.29 million.
Those are substantial differences.
That’s why I’m cautious when an investment thesis depends heavily on future cap rate compression.
You can analyze today’s income, lease and real estate.
You can’t control the market’s required return when you eventually sell.
Does a Lower Cap Rate Mean Lower Risk?
Sometimes a lower cap rate reflects characteristics investors perceive as lower risk, such as strong tenant credit, a long lease or a desirable location.
But don’t turn that relationship into a rule.
A low cap rate isn’t proof of safety.
You can still overpay for a strong tenant. A property can still have above-market rent. The building can still be poorly located. The lease can still contain unfavorable provisions.
Likewise, a higher-cap-rate property isn’t automatically a bad investment.
It may offer an attractive risk-adjusted return if you understand the risks and believe the price compensates you for them.
Price matters. Risk matters. The relationship between the two matters most.
Cap Rate vs. Cash-on-Cash Return
These terms are sometimes confused.
Cap rate compares property NOI with property value without incorporating the investor’s financing structure.
Cash-on-cash return generally compares annual pre-tax cash flow after debt service with the investor’s actual cash invested.
Suppose two investors buy identical properties but use different amounts of debt.
The property’s cap rate can be the same for both investors.
Their cash-on-cash returns can differ significantly.
That distinction becomes especially important when comparing leveraged and all-cash acquisitions.
Cap Rate vs. Interest Rate
A cap rate is also not an interest rate.
Interest rates affect borrowing costs. Cap rates relate property income to value.
The two can interact because changes in financing costs and required investor returns can influence commercial real estate pricing, but they aren’t interchangeable.
The Federal Reserve has historically evaluated cap rates alongside Treasury yields when assessing commercial real estate valuation conditions, illustrating the relationship between property yields and broader capital-market returns.
But property-specific fundamentals still matter.
Tenant credit, lease structure, location and future income expectations don’t disappear because interest rates move.
How I Use Cap Rates When Evaluating an NNN Property
I use cap rate as one piece of a larger underwriting framework.
My process looks more like this:
- Confirm the NOI. Make sure the income used in the calculation reflects the actual lease economics and landlord obligations.
- Verify the tenant and guarantor. Understand who is legally responsible for paying the rent.
- Review the lease. Look at remaining term, escalations, options, expense obligations and termination provisions.
- Compare rent with the market. Determine whether the contractual income appears sustainable.
- Evaluate the underlying real estate. Analyze location, building adaptability and potential alternative users.
- Compare similar transactions. Understand how the market is pricing properties with comparable characteristics.
- Stress-test the exit. Ask what happens to value if the future cap rate is higher than today’s rate.
Only then does the headline cap rate have enough context to be useful.
Key Cap Rate Terms
Capitalization rate (cap rate): The ratio between a property’s NOI and its value or purchase price.
Net operating income (NOI): Property income remaining after applicable operating expenses and before financing costs and certain other items. The exact calculation should be verified for the property being analyzed.
Going-in cap rate: The capitalization rate based on the income associated with the property at acquisition.
Exit cap rate: The assumed capitalization rate used to estimate property value at a future sale.
Cap rate compression: A decline in capitalization rates.
Cap rate expansion: An increase in capitalization rates.
Cash-on-cash return: A measure comparing annual cash flow with the amount of cash invested.
Key Takeaways
- Cap rates connect a property’s net operating income with its value.
- A higher cap rate means more current NOI relative to price, but may also reflect additional perceived risk.
- A lower cap rate isn’t automatically safer or better.
- Tenant credit, lease term, rent growth, location and building characteristics can all affect how investors price NNN properties.
- Cap rate changes can materially affect property value even when NOI remains unchanged.
- Cap rate isn’t the same as cash-on-cash return or an interest rate.
- Investors should verify the NOI before relying on the calculated cap rate.
- The most useful question isn’t simply “What is the cap rate?” It’s “Why is the market pricing this property at that cap rate?”
The Bottom Line
Cap rates matter because they help us connect income, price and market expectations.
But I don’t believe investors should buy a property because the cap rate looks attractive on a marketing package.
The number needs context.
Who is paying the rent? Who guarantees it? How long does the lease run? Is the rent sustainable? What are your landlord obligations? How strong is the location? Who could occupy the property next? And what happens to your investment if the market requires a higher return when you sell?
Those questions turn a cap rate from a marketing number into an underwriting tool.
I don’t want the highest cap rate. I want to understand whether the return I’m receiving adequately compensates me for the risks I’m taking.
That distinction has protected investors far more reliably than chasing yield.