Cap Rate Calculator
Calculate a property’s capitalization rate to evaluate real estate investment returns.
What Is a Cap Rate?
The capitalization rate, or cap rate, measures the expected rate of return on a rental property based on its net operating income (NOI) and current market value or purchase price. It is expressed as a percentage and helps investors quickly assess a property's income-generating potential relative to its cost.
Cap rate is a standard metric in commercial and residential real estate investing. It allows for a direct comparison between different properties regardless of their purchase price, making it useful for initial screening and portfolio analysis.
How the Cap Rate Is Calculated
The formula is straightforward:
Cap Rate = Net Operating Income (NOI) ÷ Current Property Value (or Purchase Price)
Net Operating Income is the annual income generated by the property after deducting all operating expenses, but before mortgage payments, income taxes, and depreciation. Operating expenses include property management fees, insurance, property taxes, repairs, maintenance, and utilities paid by the owner.
Current Property Value is typically the purchase price or the most recent appraised market value of the property.
For example, if a property generates $50,000 in NOI per year and is valued at $625,000, the cap rate is 8% ($50,000 ÷ $625,000 = 0.08).
How to Use This Calculator
- Enter the Net Operating Income (NOI) — the annual income after all operating expenses are paid.
- Enter the Current Property Value — the purchase price or appraised market value.
- Click Calculate — the tool will instantly display the cap rate as a percentage.
You can adjust either input to see how changes in income or property value affect the return rate. This is useful for modeling different purchase scenarios or evaluating the impact of expense reductions.
Interpreting the Result
A higher cap rate generally indicates a higher potential return, but it also often signals higher risk. Properties in less desirable locations or with older infrastructure tend to have higher cap rates because investors demand a premium for taking on additional risk.
A lower cap rate typically suggests a lower return but may reflect a more stable, lower-risk investment in a prime location with strong tenant demand.
Cap rates vary significantly by market, property type, and economic conditions. There is no single "good" cap rate — the appropriate rate depends on your investment strategy, risk tolerance, and the specific market you are analyzing.
Common Mistakes When Using Cap Rate
- Using gross income instead of net operating income. Cap rate must be calculated using NOI, not gross rental income. Failing to subtract operating expenses inflates the result and gives a misleading picture of return.
- Ignoring vacancy and collection losses. NOI should account for realistic vacancy rates and potential rent collection issues. Overly optimistic NOI estimates lead to cap rates that are not achievable.
- Comparing cap rates across different markets without context. Cap rates are location-specific. A 6% cap rate in one city may be considered high, while in another it may be average or low.
- Using cap rate as the sole decision metric. Cap rate does not account for financing costs, tax implications, appreciation potential, or the investor's personal financial situation. It is a screening tool, not a complete investment analysis.
Limitations of Cap Rate
Cap rate is a snapshot metric. It does not reflect future changes in income, expenses, or property value. It also ignores the time value of money and the impact of leverage. For properties with significant deferred maintenance or unstable income streams, cap rate may not accurately represent true investment risk.
For a more comprehensive analysis, investors often combine cap rate with other metrics such as cash-on-cash return, internal rate of return (IRR), and net present value (NPV).
Practical Use Cases
- Comparing multiple investment properties to identify which offers the best return relative to price.
- Evaluating a potential sale price — if you know the NOI and target cap rate, you can estimate a reasonable purchase price.
- Assessing market trends — tracking cap rate changes over time in a specific area can indicate shifting market conditions.
- Quick feasibility checks — before committing to a full underwriting process, cap rate helps determine if a property is worth further analysis.
Frequently Asked Questions
What is a good cap rate for rental property?
There is no universal answer. In stable, high-demand urban markets, cap rates often range from 4% to 6%. In secondary or tertiary markets, 7% to 10% or higher is common. The "good" cap rate depends on your risk tolerance, investment goals, and the specific property type.
Does cap rate include mortgage payments?
No. Cap rate is calculated using net operating income, which excludes debt service (mortgage payments). This makes it a property-level metric independent of how the property is financed. To evaluate leveraged returns, use cash-on-cash return instead.
Can cap rate be negative?
Yes. If operating expenses exceed the income generated, NOI becomes negative, resulting in a negative cap rate. This indicates the property is not generating enough income to cover its operating costs, which is generally a red flag for investors.
How is cap rate different from ROI?
Cap rate measures the return on the property's total value (unlevered), while ROI (return on investment) typically measures the return on the actual cash invested, including financing. Cap rate is property-focused; ROI is investor-focused.
Should I use purchase price or market value for cap rate?
Use the current market value or the price you expect to pay. If you are evaluating a potential acquisition, use the purchase price. If you are analyzing a property you already own, use the current appraised value for a more accurate picture of current performance.