Cap Rate: The Complete Investor's Guide
Capitalization rate (cap rate) is the most widely used metric for evaluating income-producing real estate. It measures a property's annual return based on its net operating income relative to its value, independent of financing. Cap rate lets you compare properties of different sizes, prices, and locations on an apples-to-apples basis. Every rental investor, commercial buyer, and property appraiser uses cap rate as a fundamental valuation tool.
The cap rate formula
Cap Rate = Net Operating Income (NOI) ÷ Property Value (or Purchase Price)
Example: A property generates $18,000 in annual NOI and is priced at $225,000.
Cap Rate = $18,000 ÷ $225,000 = 8.0%
This means the property returns 8% of its value annually through operating income, before any financing costs. It is the return you would earn if you bought the property with all cash.
Calculating NOI
NOI = Gross Rental Income − Vacancy Allowance − Operating Expenses
Operating expenses include property taxes, insurance, maintenance, property management, and reserves for capital expenditures. They do not include mortgage payments. Cap rate is a financing-neutral metric.
What is a "good" cap rate?
| Cap Rate | Interpretation | Typical Markets |
|---|---|---|
| 3-5% | Low yield, high appreciation potential | San Francisco, New York, Los Angeles |
| 5-7% | Balanced yield and appreciation | Denver, Austin, Nashville, Charlotte |
| 7-9% | Strong cash flow, moderate appreciation | Memphis, Indianapolis, Cleveland, Birmingham |
| 9-12% | High yield, lower appreciation or higher risk | Detroit, St. Louis, some rural markets |
| 12%+ | Very high yield, usually high risk | War zones, distressed areas |
There is no universally "good" cap rate. It depends on your investment goals. Cash flow investors target 7%+ cap rates. Appreciation investors accept 4-5% cap rates in growing markets. The right cap rate is the one that achieves your return targets.
Cap rate as a valuation tool
Cap rate can also be used to estimate property value:
Property Value = NOI ÷ Cap Rate
If a property generates $24,000 NOI and the market cap rate for similar properties is 7%:
Value = $24,000 ÷ 0.07 = $342,857
This is how commercial properties are valued — by their income, not by comparable sales. Increasing NOI (through higher rents or lower expenses) directly increases property value at the same cap rate.
Cap rate vs. cash-on-cash return
Cap rate measures unlevered return (no mortgage). Cash-on-cash return measures levered return (with mortgage). They answer different questions:
- Cap rate: "What return does this property generate on its total value?"
- Cash-on-cash: "What return do I earn on the cash I actually invested?"
Leverage (mortgage) amplifies returns. A property with an 8% cap rate might produce a 12% cash-on-cash return with 75% leverage, because your cash investment is smaller than the total property value. See our rental analysis guide for how both metrics work together.
Limitations of cap rate
Ignores financing. Two investors buying the same property with different loan terms will have different actual returns, but the same cap rate.
Ignores appreciation. A 5% cap rate property in Austin may generate 30%+ total returns through appreciation, while a 10% cap rate property in a stagnant market generates only 10%.
Point-in-time snapshot. Cap rate reflects current income and price. It does not account for future rent growth, expense increases, or value changes.
Requires accurate NOI. Garbage in, garbage out. If your income or expense estimates are wrong, the cap rate is meaningless.
Related articles
- Cash-on-Cash Return: How to Calculate
- Rental Property Analysis: Step by Step
- Real Estate ROI Guide
- How to Buy a Rental Property
- Best Rental Markets in 2026