How to Calculate Cap Rate for Commercial Properties
How to Calculate Cap Rate for Commercial Properties
Cereus Real Estate | August 26, 2026
Cap rate, short for capitalization rate, is one of the most widely used metrics in commercial real estate. Investors use it to evaluate the potential return of an income-producing property, compare different investment opportunities, and assess whether a property may be priced appropriately relative to its income.
While the cap rate formula is simple, understanding what goes into the calculation - and what the resulting percentage actually tells you - is essential when evaluating commercial real estate.
What Is a Cap Rate?
A capitalization rate measures the relationship between a property's Net Operating Income (NOI) and its current market value or purchase price.
The basic formula is:
Cap Rate = Net Operating Income ÷ Property Value × 100
For example, if a commercial property generates $100,000 in annual NOI and is valued at $1,500,000:
$100,000 ÷ $1,500,000 × 100 = 6.67%
The property's cap rate is approximately 6.67%.
A higher cap rate generally indicates a higher potential return relative to the property's price, but it may also reflect greater perceived risk. A lower cap rate can indicate a higher property valuation, stronger tenant quality, better location, longer lease terms, or lower perceived risk.
Step 1: Calculate the Property's Gross Income
The first step is determining how much income the property generates.
For commercial properties, this may include:
Base rental income
Additional rent
Tenant reimbursements
Parking income
Storage income
Other property-related income
Suppose a medical office building generates $180,000 in annual rental income.
That amount represents the property's gross income before operating expenses.
Step 2: Subtract Operating Expenses
Next, determine the property's annual operating expenses.
These can include:
Property taxes
Insurance
Repairs and maintenance
Property management
Utilities paid by the owner
Landscaping
Janitorial services
Administrative expenses
Other recurring operating costs
For example:
Gross income: $180,000
Operating expenses: $40,000
The property's NOI would be:
$180,000 − $40,000 = $140,000
Therefore, the property's annual NOI is $140,000.
What Is Not Included in NOI?
NOI generally does not include financing costs such as:
Mortgage principal payments
Mortgage interest
Investor income taxes
Depreciation
Capital expenditures
This is important because cap rate is designed to evaluate the property's operating performance before considering how the property is financed.
Step 3: Determine the Property Value
Once you know the NOI, you need the property's purchase price or current market value.
For example, assume the commercial property is being purchased for:
$2,000,000
Using the NOI of $140,000:
Cap Rate = $140,000 ÷ $2,000,000 × 100
Cap Rate = 7%
The property therefore has a 7% cap rate.
A Simple Commercial Property Cap Rate Example
Consider a hypothetical medical office property:
MetricAmountAnnual Rental Income$250,000Operating Expenses$50,000Net Operating Income$200,000Purchase Price$2,500,000Cap Rate8%
The calculation is:
$200,000 ÷ $2,500,000 × 100 = 8%
This means the property's annual NOI represents an 8% return on the property's purchase price before financing and taxes.
How to Calculate Property Value Using Cap Rate
The formula can also be reversed.
If you know the property's NOI and the market cap rate, you can estimate its value:
Property Value = NOI ÷ Cap Rate
For example, suppose a commercial property generates $300,000 in annual NOI and comparable properties are trading at a 6% cap rate.
$300,000 ÷ 0.06 = $5,000,000
The estimated property value would be approximately $5 million.
This approach is commonly referred to as the income capitalization approach to valuation.
Why Cap Rate Matters for Commercial Real Estate Investors
Cap rate can help investors compare properties with different prices and income levels.
For example:
Property A: $2 million value and $120,000 NOI → 6% cap rate
Property B: $2 million value and $140,000 NOI → 7% cap rate
Based strictly on cap rate, Property B generates more NOI relative to its purchase price.
However, investors should not automatically assume that the property with the higher cap rate is the better investment.
Does a Higher Cap Rate Always Mean a Better Investment?
No.
Cap rate should be evaluated alongside the property's risk profile and overall investment strategy.
A higher cap rate may be associated with:
Shorter lease terms
Greater vacancy risk
Lower-quality tenants
Older buildings
Less desirable locations
Higher maintenance requirements
Greater uncertainty around future income
A lower cap rate may reflect characteristics such as:
Strong tenant credit
Long-term leases
Attractive locations
Newer or well-maintained properties
Stable occupancy
Predictable rental income
For example, a fully occupied medical office building with financially strong healthcare tenants and long-term leases may trade at a different cap rate than a property with significant vacancy and near-term lease expirations.
The right question isn't simply, "What is the highest cap rate?"
Instead, investors should ask:
"Does the cap rate adequately compensate me for the risk associated with the property?"
Cap Rate vs. Cash-on-Cash Return
Cap rate and cash-on-cash return are different metrics.
Cap rate measures the property's NOI relative to its value or purchase price, without considering financing.
Cash-on-cash return measures the investor's annual cash flow relative to the amount of cash the investor actually contributed.
For example, financing can significantly change an investor's cash-on-cash return even though the property's cap rate remains unchanged.
Understanding both metrics can provide a more complete picture of a commercial real estate investment.
Cap Rate vs. ROI
Cap rate should also not be confused with total return on investment.
Cap rate generally focuses on the property's current operating income.
Total investment return may also include:
Property appreciation
Principal paydown
Refinancing proceeds
Tax benefits
Sale proceeds
Distributions
Other investment-specific factors
As a result, a property with a lower cap rate could potentially produce a competitive overall return if it has strong long-term growth potential.
What Is a Good Cap Rate for Commercial Real Estate?
There is no single cap rate that is considered "good" for every commercial property.
Cap rates can vary based on:
Property type
Geographic market
Location
Tenant quality
Lease duration
Occupancy
Property condition
Interest rates
Market conditions
Perceived investment risk
For this reason, investors should compare a property's cap rate with similar properties in the same market and asset class, rather than relying on a universal benchmark.
Common Mistakes When Calculating Cap Rate
1. Using Gross Income Instead of NOI
Cap rate should be based on Net Operating Income, not simply gross rental income.
2. Forgetting Operating Expenses
Underestimating expenses can artificially inflate NOI and make the cap rate appear higher than it actually is.
3. Including Mortgage Payments
Mortgage payments are financing expenses and generally aren't included in NOI for a standard cap rate calculation.
4. Comparing Completely Different Properties
A 7% cap rate on one property may represent a very different risk profile than a 7% cap rate on another property.
5. Looking at Cap Rate in Isolation
Cap rate is an important metric, but it should be considered alongside lease terms, tenant strength, location, property condition, projected income, financing, and the broader investment strategy.
The Bottom Line
Calculating cap rate for a commercial property is straightforward:
Cap Rate = NOI ÷ Property Value × 100
The challenge is making sure the NOI and property value accurately reflect the investment.
Cap rate can be a valuable starting point for evaluating commercial real estate, but it shouldn't be the only factor used to make an investment decision. A property's tenant quality, lease structure, location, operating expenses, income stability, and long-term potential can all have a meaningful impact on the investment's risk and return.
For investors evaluating income-producing commercial real estate, understanding cap rate is an important step toward making more informed comparisons and assessing potential opportunities.
Daniel Shin, MD
