What Is a Cap Rate?
Cap rate (capitalization rate) is a simple formula used to estimate the return on a real estate investment, assuming you paid all cash with no mortgage. It's calculated as:
Cap Rate = Net Operating Income (NOI) ÷ Property Value
For example: a property with $30,000 in annual NOI purchased for $500,000 has a 6% cap rate.
What Does Cap Rate Tell You?
Cap rate is essentially the yield you'd earn if you owned the property free and clear. It's useful for:
- Comparing properties: A property with a 7% cap rate offers more income relative to its price than one at 4.5%.
- Valuing income properties: Lenders and appraisers use cap rates to estimate market value for commercial and multifamily properties.
- Gauging market conditions: Rising cap rates typically indicate lower prices or higher returns; falling cap rates (like in California's coastal markets) suggest strong demand and compressed yields.
What's a Good Cap Rate?
This depends heavily on location and property type. In California's top metros, cap rates of 3.5–5.5% are common for quality properties. In secondary markets or the Inland Empire, 5.5–7%+ is more achievable. In the Midwest or South, investors regularly find 7–10% cap rates.
A higher cap rate isn't always better — it often signals higher risk, older inventory, or a less desirable location.
Cap Rate vs. Cash-on-Cash Return
Many investors confuse these two metrics. Cap rate ignores financing and tells you about the property's income relative to value. Cash-on-cash return measures actual return on the cash you invested after accounting for mortgage payments.
In today's higher interest rate environment, it's possible to find a property with a 6% cap rate but only a 3% cash-on-cash return — because the debt service eats into your actual cash flow significantly.
How to Calculate NOI Accurately
NOI = Gross Rental Income – Vacancy – Operating Expenses
Operating expenses typically include: property taxes, insurance, maintenance and repairs, property management fees (8–10% of gross rent), landscaping, utilities (if owner-paid), and capital expenditure reserves.
Do not include mortgage payments in NOI. Cap rate is a pre-financing metric.
Common Mistakes
- Using pro forma (projected) rents instead of actual current rents
- Underestimating expenses — sellers often present "best case" numbers
- Applying one market's cap rate standards to a different market
Bottom Line
Cap rate is a valuable tool — but it's just one piece of the puzzle. Use it alongside cash-on-cash return, GRM, and your own cash flow projections to make fully informed investment decisions.
