What is Cap Rate? How to Calculate
The capitalization rate (cap rate) is a metric used to evaluate the return potential of an income-producing real estate investment. It represents the ratio of a property's net operating income (NOI) to its current market value or purchase price. A higher cap rate means a higher return on investment relative to the price, while a lower cap rate means a lower return but often indicates a more desirable or stable market.
Cap Rate = Net Operating Income / Property Value x 100
Example: A property with $12,000 annual NOI and a value of $150,000 has a cap rate of 8%.
Cap rate is the most widely used metric for comparing rental investment properties because it normalizes for price differences. You can compare a $100,000 property in one market to a $500,000 property in another by looking at cap rates. It strips out financing (unlike cash-on-cash return) and gives you a pure measure of the property's income performance relative to its value.
How to calculate cap rate
The calculation requires two numbers: net operating income and property value.
Step 1: Calculate NOI
NOI = Gross Rental Income - Operating Expenses. Operating expenses include property taxes, insurance, property management (typically 8-10% of rent), maintenance/repairs (budget 5-10% of rent), vacancy allowance (typically 5-8%), and any HOA fees. Operating expenses do NOT include mortgage payments -- cap rate is a financing-independent metric.
Step 2: Divide by property value
Use the purchase price for your investment or current market value for an existing holding. Multiply by 100 to express as a percentage.
Full example
| Item | Annual Amount |
|---|---|
| Gross rent (12 x $1,400) | $16,800 |
| Vacancy allowance (5%) | -$840 |
| Property taxes | -$3,200 |
| Insurance | -$1,200 |
| Management (8%) | -$1,344 |
| Maintenance (5%) | -$840 |
| NOI | $9,376 |
| Purchase price | $130,000 |
| Cap Rate | 7.2% |
What's a good cap rate?
There's no universal "good" cap rate. It depends entirely on the market, property class, and your investment goals:
- 4-5%: Typical for Class A properties in major metros (new construction, prime locations). Low return but stable appreciation.
- 6-8%: The sweet spot for most single-family rental investors. Solid cash flow with reasonable property quality.
- 8-10%: Higher returns, often in secondary or tertiary markets. May involve older properties or less desirable locations.
- 10%+: High-yield but higher risk. Common in distressed areas, rough neighborhoods, or properties needing significant work.
Cap rate and property valuation
Cap rate also works in reverse for property valuation. If you know the NOI and the prevailing cap rate in a market, you can estimate property value: Value = NOI / Cap Rate. A property generating $10,000 NOI in a 7% cap rate market is worth approximately $142,857. This is how commercial appraisers and buy-and-hold investors value income properties.
Cap rate limitations
Cap rate doesn't account for financing (leverage can significantly change actual returns), appreciation potential, future rent growth, or capital expenditures (major repairs like roof replacement or HVAC). It's a snapshot metric, not a complete investment analysis. Use it alongside other metrics like cash-on-cash return and gross rent multiplier for a more complete picture.