The short answer
A capitalization rate is generally annual net operating income divided by property value or price, using a clearly defined convention. Whether a rate is attractive depends on risk, market, condition and the reliability of the income estimate.
On this page
Normalize operating income
Include realistic vacancy and operating expenses. Cap-rate NOI generally excludes financing and income taxes; state how replacement reserves and unusual items are treated so comparisons use the same basis.
Check the price of risk
A higher rate may reflect deferred work, weaker demand or uncertain income. Compare similar assets and verify the seller's assumptions before interpreting the rate as a bargain.
Worked example
$24,000 annual NOI divided by a $400,000 price equals a 6% cap rate. Debt service is assessed separately; a 6% cap rate does not mean the financed buyer receives a 6% cash return.
Calculate from one complete operating-income convention
State the property, period, actual or forecast basis and value or purchase-price date. Build effective income from supportable rent and other lawful recurring income, allowing for vacancy and collection loss. Subtract ordinary operating costs such as taxes, insurance, management, maintenance and owner-paid utilities once. Identify how replacement reserves and unusual costs are handled so the comparison is consistent.
Cap rate is annual NOI divided by the stated price or value, multiplied by 100. Financing and income taxes are reviewed separately; NOI is not gross rent, spendable cash or taxable income. The OCC commercial-real-estate handbook defines cap rate in relation to stabilized NOI and discusses valuation and underwriting. Its supervisory context is broader than a recommendation for an individual rental.
| Starting figures | NOI treatment | Result |
|---|---|---|
| $40,000 already stated as NOI; $500,000 value | Expenses already deducted; do not subtract a further $5,000 again. | $40,000 / $500,000 = 8%. |
| $40,000 effective income before $5,000 operating costs; $500,000 value | Deduct the $5,000 once to obtain $35,000 NOI. | $35,000 / $500,000 = 7%. |
Verify value and explain the differences between properties
Record the denominator's purpose and date: offer price, current supported value, assessment, automated estimate and appraisal answer different questions. Check recent comparable sales and differences in use, unit count, condition, location and income. A broker's opinion or appraisal is a scoped opinion, not a guaranteed resale price.
Compare the same NOI convention across similar properties. Lease obligations, vacancy, repair condition and current local supply can affect income reliability; a fixed term or triple-net label does not eliminate default, owner obligations or capital work. Generic city averages and low/moderate/high brackets need a dated dataset, asset definition and method. Do not treat an unsupported historical city list as current underwriting.
Test the financing and downside cash separately
Cap rate does not show debt payments, principal repayment, sale proceeds or the buyer's invested cash. Use the return explanation and cash-on-cash guide with stated periods and costs. Compare loan payments and reserves under lower rent, vacancy and higher-cost scenarios.
A cap rate above a mortgage's interest rate does not prove positive cash flow: the loan amount, amortization, actual payment, fees, reserves and other cash needs still matter. No cap-rate target or property type guarantees the best return.
Keep a calculation evidence packet
Retain the property and period, actual or forecast basis, income and cost records, vacancy assumptions, value date and supporting comparisons. Label estimates and unresolved differences before relying on the result.
Use Rentari report review to select the relevant property, period and report. Reconcile the recorded figures with supporting documents; a software report does not verify a forecast or appraise the property. Keep the operating calculation and the financed cash plan together for qualified review.
References and next steps
Use these references for the specific topic they cover. Local requirements and individual circumstances may differ.
Common questions
What is a good cap rate?
There is no universal target. Compare current similar properties, a consistent NOI and value convention, condition, income reliability and risk. A higher rate is not proof of a better investment.
Is cap rate the same as ROI?
No. Cap rate compares annual operating income with a stated price or value before financing. Return on investment and cash-on-cash measures use different cash, financing, tax and time conventions; define each before comparing.
Does debt service belong in cap-rate NOI?
Cap-rate NOI generally excludes financing. Review mortgage payments and buyer cash after financing separately, and state how reserves and unusual costs are handled.
Does a cap rate above my interest rate guarantee positive cash flow?
No. Loan size, amortization, actual debt payments, fees, vacancy, reserves and other cash requirements can still produce a shortfall. Build a financed downside cash plan.
Which type of rental is most profitable?
No property type guarantees the highest return. Use the actual price, permitted use, condition, income evidence, full costs, financing, time and risks for each candidate.
Written and maintained by the Rentari team. Examples explain a decision; they are not customer results. Found an error or an unclear step? Send a correction with this page's address and the detail to review.
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