Cap Rate Calculator
The Cap Rate Calculator computes the capitalization rate — the single most widely used metric for evaluating commercial and residential investment property. Cap rate measures a property's income potential as a percentage of its value, independent of financing. A higher cap rate signals higher income relative to price (and typically higher risk); a lower cap rate suggests a premium-priced, lower-risk asset. Use this alongside the Rental Yield Calculator to compare investment opportunities on a like-for-like basis.
Total rent collected before any expenses
Taxes, insurance, management, maintenance — not mortgage
Cap Rate
8.00%
Net Operating Income (NOI)
$28,000.00
Annual Gross Income
$36,000.00
Expense Ratio
22.2%
How to use this calculator
- 1
Enter annual gross rental income
The total rent you collect before deducting any expenses. For a multi-unit property, sum all unit rents.
- 2
Enter annual operating expenses
Include property management fees, insurance, property taxes, maintenance and repairs, and any other recurring costs. Do not include mortgage payments or depreciation — cap rate is a pre-financing metric.
- 3
Enter the property value
Use the current market value or purchase price. Cap rate changes over time as property values move — recalculate periodically to track investment performance.
- 4
Read your cap rate and NOI
The calculator shows cap rate, net operating income (NOI), gross income, and the expense ratio. A cap rate at or above 5% is generally considered acceptable; below 3% suggests the property is priced for appreciation rather than income.
Formula
NOI (Net Operating Income) = Annual Gross Income − Annual Operating Expenses
Cap Rate = (NOI ÷ Property Value) × 100
Expense Ratio = (Annual Operating Expenses ÷ Annual Gross Income) × 100NOI is the annual income after operating expenses but before financing costs (mortgage interest, principal repayments) and income taxes. Cap rate expresses NOI as a percentage of the property's value, making it comparable across properties of different sizes and markets. Example: a property worth $350,000 with $36,000 gross income and $8,000 operating expenses has an NOI of $28,000 and a cap rate of 28,000 / 350,000 × 100 = 8.0%.
Worked Example
Annual Gross Rental Income: $36,000 Annual Operating Expenses: $8,000 Property Value: $350,000 NOI = $36,000 − $8,000 = $28,000 Cap Rate = ($28,000 ÷ $350,000) × 100 = 8.0% Expense Ratio = ($8,000 ÷ $36,000) × 100 = 22.2% An 8.0% cap rate is well above the 5% minimum threshold most investors use in secondary markets. In a primary market like New York or San Francisco, the same cap rate would be considered exceptional — properties there often trade at 3–4% cap rates due to appreciation expectations.