Cap Rate (Capitalisation Rate)
The capitalisation rate (cap rate) is a property's net operating income (NOI) expressed as a percentage of its capital value or price: cap rate equals NOI divided by value. It is used to value income-producing property and compare returns and risk across assets. A lower cap rate implies a higher value for the same NOI, and vice versa.
What is cap rate?
Cap rate expresses the relationship between a property's income and its price: the annual NOI a scheme generates, divided by what it is worth. Rearranged, the same formula gives implied value: NOI divided by cap rate. Because the market sets the cap rate through comparable transactions, cap rate is really a statement about how the market is pricing risk and growth prospects for that type of asset, in that location, at that moment, not a fixed property characteristic.
A higher cap rate means the market wants a bigger income return for the risk it is taking on, which pushes the implied value down for the same NOI. A lower cap rate means the market is prepared to accept a smaller income return, usually because it sees lower risk or stronger growth prospects, which pushes the implied value up for the same NOI.
Why cap rate matters for PBSA and BTR operators
Cap rate is the figure valuers, investors and lenders actually use to price a scheme, refinance a loan, or benchmark portfolio performance, so an operator's NOI only translates into a defensible valuation if the cap rate applied is understood and current. Cap rates move with interest rates, capital availability and sector sentiment, independent of anything happening inside the scheme itself, so the same NOI can be worth materially more or less from one review to the next purely because the market has re-priced risk.
This matters most at moments an operator does not control the timing of: a lender's periodic revaluation, an investor exit, or a refinancing window. Understanding where cap rates for comparable PBSA or BTR stock currently sit is part of reading the market correctly, alongside managing the NOI itself.
How is cap rate calculated?
The formula runs both ways: cap rate from NOI and value, or implied value from NOI and cap rate.
| Input | Value |
|---|---|
| Net Operating Income (NOI) | £1,300,000 |
| Cap rate | 6.0% |
| Implied value (NOI ÷ cap rate) | ≈ £21.7 million |
Because value and cap rate move inversely for the same NOI, small movements in the market cap rate move the implied valuation significantly:
| Cap rate | Implied value for £1,300,000 NOI |
|---|---|
| 5.0% (cap rate compression) | £26.0 million |
| 6.0% (base case) | £21.7 million |
| 7.0% (cap rate expansion) | £18.6 million |
A one-percentage-point fall in cap rate here, with NOI completely unchanged, adds over £4 million to the implied value. This is what "yield shift" refers to in market commentary: cap rate compression describes cap rates falling and values rising; cap rate expansion describes the reverse. Neither has anything to do with the scheme's own performance.
How does cap rate differ from yield, GDV and IRR?
Cap rate and net yield (specifically net initial yield) are calculated the same way, income divided by property value, and are commonly used interchangeably for stabilised, income-producing property. UK institutional valuation practice tends to use "yield" or "net initial yield" as the everyday term; "cap rate" is the more international, and particularly US, label for the same underlying figure.
Cap rate is not the same as GDV (gross development value). GDV is a forward-looking appraisal figure used to value a scheme that does not yet exist or is not yet stabilised, typically derived from projected income and a comparable yield. Cap rate, by contrast, is applied to an actual, current NOI on completed, income-producing stock, and is used continuously to check how the market is pricing that stock, not just once at the appraisal stage of a development.
Cap rate is also not a projected return in the way IRR is. Cap rate is a pro-forma, point-in-time snapshot as of a single valuation date; IRR models cash flows across a multi-year holding period, including an assumed exit value, to give a projected annualised return. A scheme can have an attractive cap rate today and a poor IRR over a five-year hold, or vice versa, because the two measures answer different questions.
Key takeaways
- Cap rate = NOI ÷ property value; implied value = NOI ÷ cap rate. It is set by the market, not by the property itself.
- A lower cap rate means a higher implied value and lower perceived risk for the same NOI; a higher cap rate means the opposite.
- Cap rate compression (cap rates falling) increases values for unchanged NOI; cap rate expansion (cap rates rising) reduces them. This "yield shift" happens independently of a scheme's own performance.
- Cap rate and net initial yield use the same formula and are often used interchangeably; UK practice tends to say "yield," international and US practice tends to say "cap rate."
- Cap rate is a point-in-time snapshot, unlike IRR, and is not the same as GDV, which is a forward-looking development appraisal figure.
How Cloudfox Helps With Cap Rate
A cap-rate-based valuation is only as trustworthy as the NOI behind it, and NOI depends on void, concession and ancillary income data being captured accurately and on time, not reconciled retrospectively. Cloudfox configures the finance stack, Xero, ApprovalMax and Syft, so operators have a property-level P&L that produces a defensible NOI figure at any point in the year, and can be confident in the valuation a lender, investor or buyer will apply a market cap rate to. Find out more at cloudfox.it/finance-stack.
Frequently Asked Questions About Cap Rate
Is cap rate the same as yield?
Cap rate and net initial yield are calculated the same way, income divided by property value, and are commonly used interchangeably for stabilised, income-producing property. The difference is mostly one of convention: UK institutional practice tends to say "yield" or "net initial yield," while "cap rate" is the more common term internationally and in US commercial real estate.
Is a lower cap rate always better?
Not automatically. A lower cap rate means the market is pricing an asset at a higher value and lower perceived risk for a given NOI, which is good news for a current owner's valuation, but it also means a buyer is paying more for the same income, so future returns are lower unless income growth follows.
What do cap rate compression and cap rate expansion mean?
Cap rate compression means market cap rates are falling relative to historical levels, which increases property values for a given NOI. Cap rate expansion means cap rates are rising, which reduces property values for a given NOI. Both describe the market re-pricing risk, independent of any change in the property's own income.
Is cap rate a projected return like IRR?
No. Cap rate is a pro-forma, point-in-time snapshot of implied return as of a single valuation date. IRR models cash flows and an assumed exit value across a multi-year holding period to produce a projected annualised return. The two measure different things and can point in different directions for the same asset.
How is cap rate different from GDV?
GDV (gross development value) is a forward-looking appraisal figure for a scheme that is not yet complete or stabilised, usually built from projected income and a comparable yield. Cap rate is applied to the actual NOI of a completed, income-producing property and is used on an ongoing basis, not just once during a development appraisal.