What is Cap Rate in Real Estate?
Cap rate (capitalization rate) is a real estate metric that expresses a property's annual net operating income as a percentage of its market value — used by investors to compare properties and estimate expected returns.
Cap rate (short for capitalization rate) is one of the most fundamental metrics in real estate investing. It measures the relationship between a property's net operating income (NOI) and its current market value, expressed as a percentage. Cap rate tells an investor how much annual income a property generates relative to what they're paying for it — providing a quick way to compare properties and evaluate expected returns.
The Cap Rate Formula
$$\text{Cap Rate} = \frac{\text{Net Operating Income (NOI)}}{\text{Current Market Value}} \times 100$$
Net Operating Income (NOI) = Total rental income − Operating expenses (not including mortgage payments, taxes on gains, or capital expenditures)
Operating expenses typically include:
- Property management fees
- Property taxes
- Insurance
- Repairs and maintenance
- Vacancy allowance
Example: A property worth $500,000 generates $40,000 in annual gross rent. After $10,000 in operating expenses, the NOI is $30,000.
$$\text{Cap Rate} = \frac{$30,000}{$500,000} = 6%$$
This property has a 6% cap rate.
What Is a Good Cap Rate?
Cap rate expectations vary dramatically by property type, location, and market conditions:
| Property/Market Type | Typical Cap Rate Range |
|---|---|
| Class A urban multifamily (NYC, SF) | 3–4.5% |
| Suburban or smaller-market multifamily | 5–7% |
| Commercial – retail/office | 5–8% |
| Industrial/warehouse | 4–6% |
| Value-add or distressed properties | 8–12%+ |
Lower cap rate = lower risk, lower return. Trophy properties in prime urban markets trade at 3–4% cap rates because demand is high and appreciation potential is strong.
Higher cap rate = more income relative to price, but typically more risk. Higher cap rate properties may be in weaker markets, have older stock, or require active management.
There is no universally "good" cap rate — what matters is whether the cap rate is appropriate for the risk profile and your investment goals.
Cap Rate as a Valuation Tool
Working the formula in reverse is powerful for real estate valuation:
$$\text{Property Value} = \frac{\text{NOI}}{\text{Cap Rate}}$$
If comparable properties in a market trade at a 6% cap rate, and a property has a $45,000 NOI:
$$\text{Value} = \frac{$45,000}{0.06} = $750,000$$
This is the income approach to property valuation — widely used by commercial real estate appraisers and investors.
Cap Rate vs. Cash-on-Cash Return
Cap rate and cash-on-cash return are related but different metrics that investors often confuse:
| Metric | What It Measures | Financing Included? |
|---|---|---|
| Cap rate | Property income vs. total value | No (all-cash basis) |
| Cash-on-cash return | Cash income vs. cash invested | Yes (accounts for financing) |
Cap rate ignores financing — it evaluates the property as if bought in cash. Cash-on-cash measures actual returns on the investor's equity, which is lower when debt service is included. Real estate investing practitioners use both metrics depending on context.
Cap Rate Limitations
- Does not account for appreciation — A property in a high-appreciation market may have a low cap rate but deliver strong total returns
- Point-in-time snapshot — Cap rate reflects current income, not future rent increases
- NOI can be manipulated — Overstated income or understated expenses distort the cap rate; always verify actual financials
- Doesn't capture financing efficiency — Two properties with the same cap rate can have very different cash-on-cash returns depending on leverage used
Cap rate is best used as a screening and comparison tool, not as the sole basis for investment decisions.