Quick Answer: Calculate capitalization rate from rental income, vacancy, operating expenses, and property value.
How This Calculator Works
Cap rate estimates unlevered real estate yield by dividing net operating income by property value. It does not include financing costs or taxes.
Worked Scenario: Scenario: Screening a Rental Property
An investor wants to compare a property's income yield before adding mortgage financing.
Scenario Inputs
- Property value: USD 500,000
- Monthly rent: USD 4,200
- Vacancy: 5%
Outcome: The cap rate shows unlevered income yield and can be compared with market expectations and property risk.
Formula and Methodology
Gross rent = Monthly rent * 12
Vacancy loss = Gross rent * vacancy rate
NOI = Gross rent - vacancy loss - operating expenses
Cap rate = NOI / property value * 100
Variables
- NOI: Net operating income before debt service
- Cap rate: NOI divided by property value
Assumptions
- Debt service, income tax, depreciation, and appreciation are excluded.
- Operating expenses should include property-level recurring costs.
Limitations
- Cap rate does not measure cash-on-cash return after financing.
- Property quality, tenant risk, location, and repairs can justify different cap rates.
Cap rate is a first screen, not a full investment decision
Cap rate helps investors compare income-producing properties before financing. It is useful because it separates property income from loan structure.
A cap rate can look attractive while the actual investment is weak if repairs, vacancy, tenant risk, or financing costs are underestimated.
Key Takeaways
- Use NOI before debt service.
- Compare cap rates only across similar properties and markets.
- Pair cap rate with cash-on-cash return and repair reserves.
Building better NOI
Net operating income should be built from realistic rents, vacancy, property taxes, insurance, repairs, management, utilities paid by owner, and recurring property costs.
One-time optimism in NOI can overstate property value because every extra dollar of assumed NOI is capitalized into price.
- Use actual trailing expenses when available.
- Stress-test vacancy.
- Separate debt service from operating expenses.
NOI quality drives the valuation
A cap rate is only as reliable as the NOI. Strong investors spend more time verifying income and expenses than debating whether the cap rate looks high.
Sources and Verification Notes
- U.S. Small Business Administration: Business planning context (https://www.sba.gov/counseling/plan-your-business/)
- Consumer.gov: Budget worksheet (https://consumer.gov/content/make-budget-worksheet)
Related Calculators and Guides
- Cash-on-cash return calculator: Measure return after financing.
- Gross rent multiplier calculator: Screen price against rent quickly.
Practical FAQs
Is mortgage payment included in cap rate?
No. Cap rate is usually unlevered and excludes debt service.
What is a good cap rate?
It depends on location, risk, property type, growth, financing market, and tenant quality.
Can a high cap rate be risky?
Yes. High cap rates can signal higher risk, weaker locations, lower growth, or expected repairs.