The big tax question for anyone buying, building or refurbishing property to sell is whether the profit is trading income or a capital gain. HMRC decides that on the facts, not on what you say you intended, using the badges of trade and specific anti avoidance rules for UK property. The difference changes the tax rate, the reliefs available and how the profit is reported. Tax investigation insurance pays your accountant’s fees if HMRC challenges your treatment.

Is it trading or investment?

HMRC’s Business Income Manual (BIM60040) asks “Do the facts suggest a ‘deal’ or an investment?” and tells officers to judge this objectively, even where it conflicts with what the taxpayer says they intended. BIM60025 lists factors HMRC weighs for property:

  • previous transactions of a similar kind;
  • how the deal was organised;
  • loan funding;
  • the character of the property;
  • how long it was held, or whether a sale was arranged in advance.

The manual stresses that “no one factor is determinant”. Our guide to the badges of trade covers the general tests.

What are the anti avoidance rules for UK property?

Part 8ZB of the Corporation Tax Act 2010 and Part 9A of the Income Tax Act 2007 treat a profit on disposing of UK property as trading profit if any of these conditions applies:

  • the property was acquired mainly to realise a profit on disposal;
  • something deriving its value from the property, such as shares, was acquired with that main purpose;
  • the property is held as trading stock;
  • the property was developed mainly to realise a profit on disposal.

HMRC says the rules do not catch genuine long term investment, such as buy to let held for rental income.

Why does the classification change the tax?

  • Trading: profits are subject to Income Tax and National Insurance for individuals, or Corporation Tax for companies, and the property is stock rather than a capital asset.
  • Investment: gains are subject to Capital Gains Tax, at 18% or 24% for individuals in 2026/27 on residential property, with the 60 day reporting rule for UK residential sales. See Capital Gains Tax rates.

VAT can also apply to developers, for example on new build sales, conversions or where an option to tax has been made.

What might HMRC check?

  • the history of your property transactions and how each was funded;
  • whether gains reported as capital should have been trading income;
  • costs claimed, and whether improvement costs were treated correctly;
  • whether a company structure was used appropriately.

Solar Protect cover responds to full and aspect enquiries into Income Tax and Corporation Tax returns and VAT compliance checks.

Tax investigation insurance pays your accountant’s fees if HMRC opens a check after your cover starts. Solar Protect cover pays up to £100,000 with no excess. It never pays tax, interest or penalties. Read how our cover works or get a quote today.

Reviewed by Christine Anderson, Broker, Solar Protect. Last reviewed 7 October 2026. Sources: HMRC Business Income Manual BIM60025, BIM60040 and BIM60555; Corporation Tax Act 2010 Part 8ZB; Income Tax Act 2007 Part 9A. Cover is subject to the policy terms, conditions and exclusions. This guide is general information, not personalised tax advice.