When evaluating a commercial real estate investment, one of the first numbers investors often look at is the capitalization rate, or cap rate.
Cap rate provides a quick way to compare the income a property generates with its value or purchase price. It can help investors assess potential returns, compare opportunities and understand how the market is pricing risk.
But while the formula itself is simple, calculating a meaningful cap rate requires a closer look at the property’s income, operating expenses, leases and overall risk profile.
Here is how cap rates work, how to calculate one and what the result can and, cannot tell you about a commercial property.
What Is a Cap Rate in Commercial Real Estate?
A capitalization rate measures a property’s annual net operating income (NOI) relative to its purchase price or market value.
The basic formula is:
Cap Rate = Net Operating Income ÷ Property Value × 100
For example, consider a commercial property valued at $2,000,000 that generates $120,000 in annual NOI.
$120,000 ÷ $2,000,000 = 0.06
The property’s cap rate would therefore be 6%.
Put simply, the cap rate represents the property’s unlevered annual income return based on its current value, before considering financing costs, income taxes or changes in the property’s value.
Step 1: Calculate the Property’s Gross Income
Before calculating NOI, start by determining the income generated by the property.
Depending on the asset, income could include:
- Base rent paid by tenants
- Additional rent or operating cost recoveries
- Parking income
- Storage income
- Signage or other ancillary income
For a multi-tenant property, this means reviewing the rent roll and understanding what each tenant is actually obligated to pay under their lease.
It is also important to distinguish between contract rent and market rent. A property may currently generate significant income because of leases signed several years ago, but those rental rates may be above or below what could realistically be achieved in today’s market.
Step 2: Determine Operating Expenses
Next, identify the expenses required to operate the property.
Depending on the property and its lease structure, expenses may include:
- Property taxes
- Property insurance
- Utilities paid by the landlord
- Repairs and maintenance
- Property management
- Landscaping and snow removal
- Common area expenses
- Other recurring operating costs
Some of these expenses may be recoverable from tenants under net or additional-rent lease structures. Others may remain the landlord’s responsibility.
Financing costs, such as mortgage principal and interest payments, are generally not included when calculating NOI. Capital expenditures and income taxes are also typically excluded.
Step 3: Calculate Net Operating Income
Once income and operating expenses are established, NOI can be calculated:
NOI = Effective Gross Income − Operating Expenses
Consider a property generating $250,000 in effective annual income with $85,000 in operating expenses.
$250,000 − $85,000 = $165,000 NOI
If the property is being purchased for $2,750,000:
$165,000 ÷ $2,750,000 = 6%
The going-in cap rate is therefore 6%.
This calculation is straightforward. Determining whether the $165,000 NOI is sustainable is where commercial real estate analysis becomes more nuanced.
What Is a Good Cap Rate for Commercial Property?
There is no universal “good” cap rate for commercial real estate.
A cap rate reflects both return and perceived risk. Generally, lower-risk properties may trade at lower cap rates, while properties carrying greater uncertainty or requiring a higher return may trade at higher cap rates.
For example, an investor may view a fully leased property with strong tenants and long-term leases differently from a property with significant vacancy and several leases approaching expiry, even if the buildings are otherwise similar.
Factors that can influence cap rates include:
- Property type
- Location
- Tenant quality and covenant
- Remaining lease terms
- Vacancy
- Rental rates relative to market
- Building age and condition
- Required capital expenditures
- Redevelopment potential
- Financing conditions
- Investor demand
- Broader economic conditions
This is why comparing a property’s cap rate to an arbitrary benchmark can be misleading. The more useful comparison is often with recent transactions involving genuinely comparable properties in the same market.
How to Calculate Cap Rate on a Mixed-Use Property
Mixed-use properties can require additional analysis because different portions of the building may have very different income and risk characteristics.
Consider a building with retail space at grade and residential apartments above.
The residential units may have relatively consistent occupancy but different lease structures and expense considerations than the commercial component. Meanwhile, the retail tenant may occupy a significant percentage of the building’s rentable area and income but have a lease expiring in two years.
The overall cap rate can still be calculated using:
Total Property NOI ÷ Property Value
However, an investor should also examine the components contributing to that NOI.
Questions might include:
- How much NOI comes from the residential versus commercial space?
- Are current residential and commercial rents consistent with market rates?
- When do the commercial leases expire?
- What expenses can be recovered from commercial tenants?
- Are there upcoming vacancies or renewal negotiations?
- Are there different capital requirements for each portion of the building?
Two mixed-use buildings generating identical NOI can therefore represent very different investment opportunities.
Why Lease Expirations Matter When Looking at Cap Rate
A cap rate is based primarily on the property’s current income, but an investor is buying its future income stream.
Suppose a property produces $200,000 in NOI and is offered for $3,000,000.
That equates to approximately a 6.67% cap rate.
On the surface, that may appear attractive relative to another property trading at 6%.
But what if a tenant responsible for 40% of the property’s rental income has a lease expiring within 12 months?
The buyer now has to consider:
- The likelihood of renewal
- Whether the tenant is currently paying above or below market rent
- Potential downtime between tenants
- Leasing commissions
- Tenant improvement allowances
- Renovation requirements
- The availability of replacement tenants
The mathematical cap rate hasn’t changed, but the risk associated with that income has.
This is one reason cap rate should never be considered in isolation.
Cap Rate vs. Return on Investment
Cap rate and return on investment (ROI) are related concepts, but they are not interchangeable.
Cap rate evaluates the property’s operating income relative to its value without incorporating the investor’s specific financing structure.
ROI can account for factors such as:
- The investor’s initial equity
- Mortgage financing
- Debt service
- Capital improvements
- Sale proceeds
- Appreciation or depreciation
- Holding period
Two investors could therefore acquire the same property at the same cap rate but experience different returns depending on how the acquisition is financed and how the property performs over time.
How Do Interest Rates Affect Commercial Real Estate Cap Rates?
Interest rates and cap rates are not directly linked by a fixed formula, but financing conditions can influence how investors value commercial properties.
When borrowing becomes more expensive, investors may require greater returns to justify an acquisition. Higher debt costs can also reduce the amount buyers are able or willing to pay while maintaining their target returns.
Over time, these pressures can contribute to changes in property pricing and cap rates.
The relationship isn’t always immediate, however. Property fundamentals, investor demand, available capital, lease quality and expectations for future income can all influence pricing.
For this reason, changes in interest rates should be considered alongside broader commercial real estate market conditions rather than viewed as an isolated predictor of cap rates.
Can You Use Cap Rate to Determine Commercial Property Value?
Cap rate can also be used to estimate value when a property’s NOI and an appropriate market capitalization rate are known.
The formula becomes:
Property Value = NOI ÷ Cap Rate
If a property generates $150,000 in sustainable annual NOI and comparable properties suggest a market cap rate of 6.25%:
$150,000 ÷ 0.0625 = $2,400,000
This suggests an indicated value of approximately $2.4 million using the income approach.
However, the result is only as reliable as the assumptions behind it.
If the NOI doesn’t accurately reflect normalized property performance, or the selected cap rate isn’t supported by relevant market evidence, the resulting value can be misleading.
Commercial property valuation may therefore consider several factors in addition to capitalization rates, including comparable sales, lease structures, property condition, location and future potential.
For a broader discussion of these factors, see our guide to How to Value a Commercial Property in Ontario.
Why Market Context Matters
Perhaps the biggest limitation of cap rates is that the calculation itself doesn’t tell you what cap rate the market will accept.
That requires market evidence.
A 6% cap rate may represent aggressive pricing for one asset and an attractive opportunity for another. Even properties within the same asset class can trade differently based on location, tenancy, building quality and future income expectations.
Local market knowledge becomes particularly important in markets such as Kingston and Eastern Ontario, where transaction volumes for specific asset types may be smaller than in major metropolitan markets.
Understanding recent comparable transactions, active listings, leasing conditions and investor expectations can provide important context when interpreting a property’s cap rate.
The Bottom Line
Calculating a commercial property’s cap rate is relatively simple:
Cap Rate = NOI ÷ Property Value
Understanding what that number actually means requires considerably more analysis.
The quality and durability of the NOI, tenant profile, lease expirations, market rents, building condition, financing environment and local investment market can all influence how buyers perceive a property’s risk and ultimately what they are willing to pay.
For property owners, investors and prospective purchasers, cap rate is best viewed as one tool within a broader commercial real estate analysis, not a standalone measure of whether a property is a good investment or what it is worth.
If you are evaluating the potential sale, purchase or value of a commercial property in Kingston or Eastern Ontario, Rockwell Commercial Real Estate can provide market insight based on current leasing conditions, comparable transactions and local investment activity.
Information provided above is for general educational and informational purposes only.
