Abandonment Losses: Claiming Tax Relief on Failed Investments

What Is an Abandonment Loss?

An abandonment loss arises when a capital asset — most commonly shares in a subsidiary or an investment — becomes completely worthless and is formally abandoned. Unlike an ordinary disposal, there is no sale proceeds. Instead, the company claims that the asset has a negligible value, triggering a deemed disposal at nil consideration under Section 24 TCGA 1992.

This is particularly relevant for limited company directors who have set up subsidiaries, made equity investments in other businesses, or held shares in companies that have since failed. If the investment has gone to zero, you may be sitting on an unclaimed capital loss.

The Two Main Routes to a Claim

• Negligible Value Claim (S24(2) TCGA 1992): You elect for a deemed disposal and reacquisition at nil value. The asset does not need to be physically abandoned — it simply must be worth nothing. HMRC publishes a list of shares officially accepted as having negligible value, which can speed up the process.
• Actual Abandonment: Where shares or an asset are formally given up with no consideration received, an abandonment loss crystallises at the point of abandonment. This requires clear evidence that the asset was intentionally relinquished.

Shares in Subsidiaries: The Key Conditions

For losses on shares in subsidiary companies, there is an important restriction. Substantial Shareholding Exemption (SSE) under Schedule 7AC TCGA 1992 can exempt gains on qualifying disposals — but it can also block losses. If SSE applies to the shareholding, any loss on disposal (including abandonment) is similarly disallowed. Always check whether SSE applies before assuming a loss is available.

Where SSE does not apply, the parent company can claim the capital loss in the normal way. The loss is set against capital gains in the same accounting period. If there are insufficient gains, the loss is carried forward indefinitely against future capital gains.

What Evidence Does HMRC Expect?

HMRC will scrutinise abandonment loss claims carefully. To support your claim, you should gather the following:

• Evidence that the subsidiary or investee company has ceased trading or entered insolvency (e.g., Companies House dissolution notice, liquidator's report)
• Board minutes documenting the decision to abandon the investment
• A written statement confirming no consideration was received
• Historic cost of the investment, supported by share purchase agreements or capital contribution records
• Confirmation that SSE does not apply, with reasoning

How to Make the Claim

The claim is made in your Corporation Tax return (CT600) for the accounting period in which the abandonment or negligible value election is made. Capital losses are reported in the supplementary CT600 pages. If you are making a negligible value claim, you can backdate it to an earlier accounting period (subject to a two-year time limit) if the shares were already worthless at that earlier date — this can be valuable if it creates a loss in a period where gains were available.

For large claims, consider including a white space disclosure in your CT600 explaining the basis of the claim. This demonstrates transparency and can reduce the risk of a lengthy HMRC enquiry.

Planning Points for Directors

• Review your company's balance sheet annually for investments in dormant or failed entities — losses can go unclaimed for years.
• If a subsidiary is being wound up, time the formal abandonment or liquidation to a period where your company has capital gains to offset.
• Intercompany loans written off may also give rise to a separate loan relationship debit — take advice on whether the loan and share loss can both be claimed.

Get Professional Advice

Abandonment loss claims involve detailed analysis of SSE, the nature of the asset, and timing elections. An error can result in a disallowed claim or an HMRC enquiry. Speak to a qualified tax adviser before filing, and ensure your CT600 accurately reflects the position.