The capitalisation rate

The rule

The capitalisation rate is the property world's price to earnings ratio, inverted. Where a stock trades at a multiple of its earnings, a building trades at a yield on its income, and the two are the same statement written from opposite ends.

Its value is that it strips out everything specific to the buyer. Two people bidding on the same tower floor will finance it differently, pay different fees, and face different tax. The cap rate ignores all of that and asks one question: what does this building produce, relative to what it costs? That is why it is the number surveyors, funds and lenders use to compare assets, and why it is the wrong number for deciding whether a particular purchase is good for you.

What has to be true for the number to mean anything

Net operating income is doing all the work, and it is the part most often reported dishonestly.

It is the achieved rent, not the asking rent. It is after the service charge, which in Dubai is the single largest running cost and varies enormously between a well run building and a badly run one. It is after management, after a maintenance reserve, after insurance, and after an allowance for the weeks the unit is empty between tenants. It is before any mortgage payment, because the mortgage belongs to you rather than to the building.

Miss any one of those deductions and the rate you calculate is not comparable to anyone else's. Miss all of them and you have computed the gross rental yield and given it a better name.

The three numbers, and what each one answers

They are frequently used as synonyms. They are not.

Read down that column and the cap rate's position is clear: it is one step better than a gross yield and two steps short of an answer. It is also only the first of the three terms that make up a return, which the decomposition sets out in full. The step from cap rate to net rental yield is the acquisition cost, which in Dubai is the four percent transfer fee plus agency, trustee and registration. The step from there to cash on cash return is the mortgage.

The part that gets people hurt

Rearrange the definition and the cap rate stops being a measure and becomes a price.

Value equals net operating income divided by the cap rate. Income in the numerator, and a rate in the denominator that is set by the market rather than by the building. When money is cheap, buyers accept lower rates, and the same income supports a higher price. When rates rise, buyers demand more, and the same income supports less.

That relationship is real, and it is also the source of the most common bad argument in property research: that cap rates look attractive against government bond yields. The Fed model is why that particular comparison does less work than it appears to.

The arithmetic is unforgiving and it is not symmetrical in the way people expect. A move from six percent to seven, which sounds small, takes fourteen percent off the value of a building whose rent has not changed by a single dirham. A leveraged buyer at eighty percent loan to value has lost most of their equity in that move without anything at all happening to the asset.

This is the risk that does not appear anywhere in a rental yield calculation, and it is why a purchase should survive a rate that is one to two percentage points worse than the one you bought at.

Where the market rate comes from

There is no published cap rate for a Dubai community. It is inferred, from recorded transactions, by dividing plausible net income by the price the sale actually printed at.

That inference is only as good as the transaction data behind it, which is the argument for working from Dubai Land Department records rather than from listings, and for demanding enough sales before you believe a figure. A cap rate calculated from three sales in a quiet quarter is a number about three buildings, not about a market. The same discipline the price per square foot framework applies to valuation applies here.

What to do with it

Use it to rank. It is genuinely good at telling you that one building is priced more richly than another, and at telling you what a seller is implicitly assuming about rent.

Then stop using it, and switch to the numbers that describe your position rather than the building's: net yield on everything you paid, cash on cash if you borrowed, and break-even occupancy for how much can go wrong before the asset starts costing you money. A property can have an attractive cap rate and a break-even occupancy of ninety two percent, and the second number is the one that will decide how you feel about owning it.

The arithmetic

Where it breaks

• The denominator is the price alone. Every acquisition cost sits outside it, so a cap rate is always flattering next to the net yield on what you actually paid, by roughly the share those costs add to the purchase.
• It is defined on net operating income. A listing quoting a cap rate calculated on gross rent is quoting a gross yield wearing a more professional name, and the gap between the two is the entire running cost of the building.
• A cap rate is not a return. It carries no capital growth, no leverage and no tax, so two buildings at the same rate can be completely different investments once those three are put back in.
• Rates compress when money is cheap and expand when it is not. A building bought at a low rate and sold at a higher one loses value even though its rent never fell, which is the arithmetic behind most institutional property losses.
• A cap rate taken off an asking price is a hypothesis about what a seller wants. Only a rate computed from a recorded sale price is evidence of what the market paid.

When to use it

When ranking income producing properties against each other, and when testing what an asking price is assuming about the rent it needs to support. Not when working out what your own money will earn, which is cash on cash.

Sources

1. Dubai Land Department
2. Aswath Damodaran, valuation data and teaching materials
3. BIS residential property price statistics

Last reviewed 27 August 2026. Commercial relationship disclosure: the author works in Dubai real estate brokerage. See the disclosure standards. Disclosure standards.