The capitalisation rate is the standard shorthand for pricing income property, and it is routinely misread as the return an investor will earn. It measures something narrower than that.
What the figure contains
A cap rate divides net operating income by the purchase price, where net operating income is rent less running costs such as management, insurance, maintenance and property taxes.
It deliberately excludes financing, so the figure describes the property rather than the buyer. Two purchasers with different mortgages face the same cap rate on the same asset.
It also excludes income tax and any capital expenditure, which means it measures the property's operating yield at a single moment rather than an investor's outcome over time.
Low rates signal confidence, not poor value
A low cap rate means a buyer accepted a small income relative to price, which happens where the income is considered secure and likely to grow.
Prime locations with strong tenant demand consistently trade at lower cap rates, while secondary locations with uncertain demand trade higher because buyers require compensation for risk.
Reading a high cap rate as a bargain inverts the meaning. It usually indicates the market's assessment that the income is less dependable or less likely to grow.
Growth is the missing term
Total return combines the income yield with any change in value, and change in value is driven largely by growth in the income the property can command.
An asset yielding modestly today with strong rental growth ahead can outperform a higher-yielding one whose income is flat or declining.
Because the cap rate captures only the current income, it systematically favours assets with poor prospects when used as the sole comparison.
Capital expenditure eventually arrives
Roofs, systems and structural elements have finite lives, and replacing them is a capital cost that never appears in net operating income.
An older building can show an attractive cap rate precisely because deferred expenditure is not reflected in it, and the buyer inherits that obligation.
Serious analysis sets aside a reserve for these costs, which reduces effective income and narrows the apparent gap between newer and older assets.
Leverage changes the investor's figure entirely
Borrowing at a cost below the cap rate raises the return on the invested equity, and borrowing above it reduces that return, sometimes to nothing.
Because the relationship depends on rates that change while the property is held, the same asset can shift from accretive to dilutive without the property itself changing.
This is why comparing properties by cap rate and comparing investments by return are different exercises, and conflating them produces the most common error in the field.