What Is Cap Rate in Commercial Real Estate?
The capitalization rate is the single most important metric in commercial real estate investing. Here's what it means, how to calculate it, and why it matters for every acquisition decision.
Cap rate, defined
The capitalization rate — universally called “cap rate” — is the ratio of a property’s annual net operating income (NOI) to its purchase price or current market value. It’s expressed as a percentage and represents the unleveraged annual return you’d earn if you bought the property entirely with cash.
Cap rate is the language of commercial real estate pricing. When a broker says a property is “trading at a 7 cap,” they mean the NOI divided by the price equals 7%. It’s how buyers, sellers, lenders, and appraisers communicate value across every asset class — industrial, retail, office, and multifamily.
What makes cap rate uniquely useful is that it strips out financing. Two investors can look at the same property with completely different loan structures and still agree on the cap rate. It levels the playing field for comparing properties across markets, sizes, and capital structures.
However, cap rate has limits. It’s a snapshot metric — it tells you about today’s income relative to today’s price, but says nothing about future rent growth, capital expenditures, or lease rollover risk. Smart investors use cap rate as a starting point, not the final word.
How to calculate cap rate
Cap Rate = NOI ÷ Purchase Price
Start with net operating income (NOI) — the property’s annual gross rental revenue minus operating expenses (property taxes, insurance, CAM, management fees, and repairs/reserves). NOI does not include debt service, capital expenditures, or income taxes.
Divide NOI by the purchase price (or current market value for existing holdings). The result is the cap rate. A property generating $350,000 in NOI priced at $5,000,000 has a cap rate of 7.0%.
You can also reverse the formula to determine value: if you know the market cap rate and the NOI, divide NOI by cap rate to estimate the property’s value. This is how appraisers use the income approach to valuation.
Example: cap rate in a real deal
Sample inputs
- Purchase price
- $6,500,000
- Building SF
- 45,000
- Gross revenue
- $585,000
- Operating expenses
- $117,000
- NOI
- $468,000
- Cap rate
- 7.2%
This 45,000 SF industrial warehouse generates $585,000 in annual gross rent from three NNN tenants. After subtracting $117,000 in operating expenses (taxes, insurance, and common area maintenance), the NOI is $468,000.
Dividing $468,000 by the $6,500,000 purchase price yields a 7.2% cap rate. In the current market, industrial properties in secondary markets typically trade between 6.5% and 8.0%, so this deal is priced within the expected range. Whether it’s a good deal depends on the tenant quality, lease term remaining, and re-leasing prospects — factors that cap rate alone doesn’t capture.
Why cap rate matters for investors
Cap rate is how you compare apples to apples in commercial real estate. A 50,000 SF warehouse in Houston and a 12,000 SF retail center in Nashville may have nothing in common except one thing: you can evaluate both using cap rate to understand the unleveraged return relative to price.
It’s also a proxy for risk. Lower cap rates (4–6%) typically indicate stable, well-located properties with strong tenants and long lease terms — think credit-rated NNN deals in primary markets. Higher cap rates (8–10%+) suggest more risk: shorter lease terms, weaker tenant credit, secondary locations, or deferred maintenance. The premium compensates you for taking on that risk.
For acquisition underwriting, cap rate helps you determine whether a deal is priced fairly relative to the market. If comparable sales in a submarket are closing at 6.5% cap rates and you’re looking at a property priced at a 5.5% cap, you need a strong thesis for why that premium is justified.
Cap rate also directly impacts your exit strategy. If you buy at a 7% cap and sell at a 6.5% cap (cap rate compression), you capture significant appreciation even without any NOI growth. Conversely, if cap rates expand during your hold period, you could lose value even as income increases.
Common mistakes with cap rate
Using gross income instead of NOI
Cap rate uses net operating income — after expenses. Using gross revenue will give you an artificially low (better-looking) cap rate that doesn't reflect reality.
Including debt service in the calculation
Cap rate is an unleveraged metric. Debt service, mortgage payments, and financing costs should never be part of the NOI used in cap rate calculations.
Comparing cap rates across asset classes
A 7% cap on an industrial warehouse means something very different than a 7% cap on a Class B office building. Risk profiles, lease structures, and growth prospects vary dramatically by asset class.
Ignoring lease rollover risk
A property with a high cap rate and 18 months of remaining lease term is a fundamentally different risk profile than the same cap rate with 8 years remaining. Cap rate doesn't capture this distinction.
Treating cap rate as a complete analysis
Cap rate is one metric. A complete underwriting analysis considers DSCR, cash-on-cash return, IRR, lease structure, tenant credit, capital expenditure requirements, and market fundamentals.
Frequently asked questions
What is a cap rate in simple terms?
Cap rate is the annual return a commercial property generates relative to its purchase price, before accounting for financing. It's calculated by dividing the property's net operating income (NOI) by the purchase price. A 7% cap rate means the property produces income equal to 7% of its purchase price each year.
What is a good cap rate for commercial real estate?
There's no universal 'good' cap rate — it depends on asset class, location, tenant quality, and market conditions. Stabilized Class A properties in primary markets typically trade at 4–6%, while value-add properties in secondary markets may trade at 7–10%. Higher cap rates generally indicate higher risk and higher potential returns.
Is a higher or lower cap rate better?
It depends on your investment strategy. Lower cap rates indicate more stable, lower-risk properties with predictable income. Higher cap rates offer more yield but typically come with more risk — shorter leases, weaker tenants, or properties requiring capital investment. Neither is inherently better; it's about matching risk to your return requirements.
Does cap rate include mortgage payments?
No. Cap rate is calculated using NOI (income minus operating expenses) divided by purchase price. It does not include debt service, mortgage payments, or any financing costs. This makes cap rate useful for comparing properties regardless of how they're financed.
How does cap rate relate to property value?
Cap rate and property value are inversely related. If NOI stays constant and cap rates compress (go down), property value increases. If cap rates expand (go up), property value decreases. This is why investors track cap rate trends — changes in market cap rates directly impact the value of every commercial property.
Can I use cap rate for residential properties?
Cap rate is primarily used for commercial real estate — office, retail, industrial, and multifamily (5+ units). For single-family residential, investors more commonly use gross rent multiplier or cash-on-cash return. However, the concept applies to any income-producing property.
Final thoughts
Cap rate is the foundation of commercial real estate analysis. It’s simple to calculate, universally understood, and immediately useful for comparing investment opportunities. But it’s a starting point — not a conclusion. The best investors use cap rate as one input in a comprehensive underwriting process that considers lease structure, tenant quality, capital needs, and market dynamics.
DealWise AI calculates cap rate automatically as part of its deal analysis workflow — along with DSCR and multi-year cash flow projections. If you’re still running these numbers in spreadsheets, there’s a faster way.
Related guides
Exit cap rate
The assumption most of the return rests on, and how far 50 basis points moves it.
What is NOI?
Understanding net operating income and how it drives cap rate.
What is a good cap rate?
Current cap rate benchmarks by asset class and market.
Cap rate vs NOI explained
How these two metrics work together in deal analysis.
How to calculate cap rate
The step-by-step walkthrough, from gathering inputs to interpreting the result.
Cap rate formula, example and calculator
Three worked deals and the reverse formula for valuation.
Commercial real estate metrics
Every CRE metric explained in one guide.
Cap rate is one number. Underwriting is the rest of them.
DealWise AI derives NOI from your actual rent roll — lease by lease, with escalations, reimbursements and rollover — then reports the going-in cap rate, DSCR and multi-year cash flow. Free to start.