A property developer classifies each property by what it is held for. Property built or bought to sell in the ordinary course of business is stock (inventory) under Section 13 of FRS 102 and is carried at the lower of cost and estimated selling price less costs to complete and sell. Property held to earn rent or for capital growth is investment property under Section 16 and is remeasured to fair value at every reporting date, with gains and losses in profit or loss.

What decides whether a developer’s property is stock or investment property?

The two definitions in the FRS 102 glossary are written around purpose. Inventories are assets held for sale in the ordinary course of business, in the process of production for such sale, or materials and supplies used in production. Investment property is property held by the owner, or by a lessee as a right of use asset, to earn rentals or for capital appreciation or both, rather than for use in supplying goods or services or for administration, or for sale in the ordinary course of business.

For a developer the phrase “sale in the ordinary course of business” does most of the work. A housebuilder’s plots, work in progress and finished homes awaiting sale are stock because selling them is the business. A block of flats the same company has decided to keep and let is investment property, even though it was built by the same site team using the same suppliers. Two identical buildings on one estate can therefore sit in different parts of the balance sheet.

The classification is made property by property, not company by company. A developer can hold stock, investment property and its own office (property, plant and equipment under Section 17) at the same time. Paragraph 16.4 also requires a mixed use building to be split between investment property and other property if the portions could be sold or leased out separately; if the fair value of the investment part cannot be measured reliably, the whole building is treated as property, plant and equipment. The investment property guide covers mixed use and group lettings in more detail.

How is development stock measured?

Paragraph 13.4 requires inventories to be measured at the lower of cost and estimated selling price less costs to complete and sell. Cost for a developer typically includes the site, construction, professional fees and directly attributable overheads. It does not move up when house prices rise: any profit is recognised only when the property is sold. If the market falls, or a scheme runs over budget, the comparison with estimated selling price less costs to complete may force a write down. The stock valuation guide explains how that test is applied item by item.

Interest on development finance is a policy choice. Paragraph 25.2 allows an entity to capitalise borrowing costs directly attributable to the acquisition, construction or production of a qualifying asset, which the glossary defines as an asset that necessarily takes a substantial period of time to get ready for its intended use or sale. If the policy is adopted it must be applied consistently to a class of qualifying assets; otherwise all borrowing costs are expensed as incurred. See capitalising borrowing costs.

How is investment property measured?

Paragraph 16.5 sets initial measurement at cost: purchase price plus directly attributable expenditure such as legal and brokerage fees, property transfer taxes and other transaction costs. For a self constructed investment property, cost is found using paragraphs 17.10 to 17.14, the same rules used for property, plant and equipment.

After that, paragraph 16.7 requires investment property to be measured at fair value at each reporting date, with changes in fair value recognised in profit or loss. There is no depreciation. Section 2A gives guidance on determining fair value, and paragraph 16.10 requires disclosure of the methods and significant assumptions used and the extent to which the valuation was made by an independent valuer with a recognised and relevant professional qualification and recent experience of the location and class of property.

The result is that a developer’s profit and loss account can contain two very different kinds of gain: realised development margin on sales, and unrealised revaluation movements on retained stock let to tenants. Users of the accounts, lenders and HMRC all read those differently, which is why the classification needs to be right.

What about property the developer uses itself?

A head office or other building the developer occupies for its own business is neither stock nor investment property. It is property, plant and equipment under Section 17, depreciated over its useful life (see property, plant and equipment under FRS 102). Paragraph 16.3A adds that property held primarily for social benefits, such as social housing held by a public benefit entity, is also property, plant and equipment rather than investment property.

What happens when the plan for a property changes?

Developers often change their minds. A slow selling scheme may be let instead; a let block may be emptied and sold off as individual units. FRS 102 does not allow the accounts to follow intentions alone. Paragraph 16.9 permits a transfer into or out of investment property only when the property meets, or ceases to meet, the definition and there is evidence of that change. Evidence usually means something has actually happened: tenants have signed leases, or development work to prepare units for sale has started.

  • Stock to investment property. Under paragraph 16.9C, when inventory becomes investment property carried at fair value, the difference between fair value at the date of transfer and the previous carrying amount is recognised in profit or loss.
  • Investment property to stock. Under paragraph 16.9A, when a property ceases to be investment property, for example because it becomes inventory, its fair value at the date of change in use becomes its deemed cost for subsequent accounting under Section 13.
  • Owner occupied to investment property. Paragraph 16.9B applies Section 17 up to the date of change and treats the difference between carrying amount and fair value like a revaluation.

How does a transfer work in numbers?

Illustration only. A developer builds four identical houses at a cost of £200,000 each. Three are sold during the year. Shortly before the year end the board decides to keep the fourth and let it, and a tenant signs a tenancy agreement. The fair value of the house at that date is £300,000.

Step Accounting entry Amount
Carrying amount in stock before transfer Lower of cost and estimated selling price less costs £200,000
Transfer to investment property (paragraph 16.9C) Investment property recognised at fair value £300,000
Difference Gain recognised in profit or loss £100,000

Without the signed tenancy, a board minute alone would be weak evidence of a change in use, and the house would stay in stock at £200,000. Deferred tax on the difference between fair value and tax base also needs considering; see deferred tax under FRS 102.

Does the tax treatment follow the accounts?

For corporation tax, section 46 of the Corporation Tax Act 2009 requires trading profits to be calculated in accordance with generally accepted accounting practice, subject to adjustments required or authorised by law. Section 156 defines trading stock as anything, whether property or otherwise, sold in the ordinary course of the trade or that would be sold once its construction was complete. So development stock is generally a trading asset and its sale produces trading profit, while a retained investment property is a capital asset whose disposal is dealt with under the chargeable gains rules.

HMRC does not simply accept the accounting label. Its Business Income Manual at BIM60030 treats the intention at the time of acquisition as central, and says that for property the acquisition happens on exchange of contracts. BIM60040 says the transaction should be examined objectively against the badges of trade, so a property recorded as an investment can still be a trading deal; see developer or investor for tax.

Specific rules apply when property moves between categories. Section 157 CTA 2009 says that when trading stock is appropriated for another purpose, the amount it would have realised on an open market sale at that time is brought in as a trading receipt. In the example above that would mean a trading profit of £100,000 when the house is moved into the let portfolio. Going the other way, section 161(1) of the Taxation of Chargeable Gains Act 1992 treats a capital asset appropriated to trading stock as sold at market value; section 161(3) allows an election instead to reduce the stock value by the gain, and for corporation tax the election must be made within two years after the end of the accounting period of the appropriation.

What mistakes come up?

  • Revaluing unsold development stock upwards because the market has risen. Stock stays at cost unless it must be written down.
  • Transferring property on the strength of a board intention with no supporting evidence of a change in use, contrary to paragraph 16.9.
  • Leaving retained, let property in stock at cost, which understates assets and omits fair value movements required by paragraph 16.7.
  • Assuming the accounting classification settles the tax position, when HMRC looks at intention and the badges of trade, and ignoring the market value rules in section 157 CTA 2009 and section 161 TCGA 1992 on appropriations.
  • Capitalising interest on some schemes and not others, when paragraph 25.2 requires a consistent policy for a class of qualifying assets.

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Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 8 October 2026. Part of Accountapedia, the Solar Protect guide to UK tax and accounting. This page is general information, not personalised advice.