Cap rate, defined: net operating income divided by price, expressed as a percentage. It is the unlevered return an all-cash buyer captures before financing, and it is the number every income property is priced against.
In plain words. A building producing $100,000 of net income, priced at $1.25 million, trades at an eight percent cap rate. The cap is the yield on the income, before any debt, before any tax. It is the price-to-earnings multiple of real estate, expressed as a yield instead of a multiple.
Why it matters. Every comparison in commercial real estate runs through the cap. Low cap means the market pays more per dollar of income, usually because that income is safer, growing, or both. High cap means the market demands more return for more risk. When an owner hears "the market is at a five and this is a six-and-a-half," they are hearing a pricing judgment about the building.
Where it goes wrong. The cap in a listing is only as real as the income behind it. A pro forma cap built on optimistic rents, zero bad debt, and a management fee the owner does not actually pay is a phantom. The only cap that prices a property is the one on verified trailing income. A cap that will not survive a loan maturity is not a cap; it is a hope with a numerator.
The quotable line. A cap rate is the price-to-earnings ratio of a building, and like any multiple, it is only as good as the earnings underneath it.
The floor that caps the downside. Every Southern California commercial value carries a land-value floor: what the dirt is worth if the building were not there. The income approach prices the operation; the land floor prices the worst honest case. An owner who knows both numbers knows the range the market actually lives in.
Run your own building's cap on verified income at https://williamscap.ai/tools/cap-rate-calculator, and get the white-glove version, with comps and the land floor, at https://williamscap.ai/services/broker-opinion-of-value within two business days. This is education, not investment advice.
Quick answers
What is a cap rate in simple terms?
Cap rate equals net operating income divided by price. It shows the return an all-cash buyer earns before financing — a building with $100,000 net income at $1.25 million is an 8% cap.
Is a higher cap rate better?
Not by itself. A lower cap usually means a safer or faster-growing income stream; a higher cap is the market demanding more return for more risk. The right cap fairly prices the actual risk.
What is a good cap rate for commercial real estate in Southern California?
There is no single good number — caps vary by asset class, tenancy, and submarket, and they move. The defensible approach is comparing recent closed sales of truly comparable properties, not chasing one headline number.
See the value your property supports right now
(213) 880-8107 | Francisco.Williams@williamscap.ai
Get your number in two business daysNo one can promise to stop, postpone, or prevent a foreclosure — including us. Francisco Williams, CA DRE #01979442, NMLS #1858674 — KW Commercial Beverly Hills / Williams Capital Advisors. This article is educational and not legal, tax, or financial advice.