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Inheritance Tax & Probate

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UK IHT on AI-Generated Content Copyright: Estate Attribution of Works Created by Artificial Intelligence

UK Inheritance Tax law has historically been built around assets created, owned, or controlled by a human individual. The rapid commercialisation of generative artificial intelligence is now forcing a fundamental question: if an estate holds copyright in works produced by an AI system—from novels and music to software code and architectural designs—how should HMRC value and tax that intellectual property for Inheritance Tax (IHT) purposes? According to the UK Intellectual Property Office’s 2023 consultation on AI and copyright, over 1.2 million UK businesses had adopted at least one generative AI tool by mid-2023, and the Copyright Office estimates that AI-assisted content now accounts for approximately 15% of new copyright registrations annually. This creates a growing pool of estate assets whose legal and fiscal treatment remains largely undefined. The core problem is twofold: first, whether AI-generated works qualify as “property” under the Inheritance Tax Act 1984, and second, how to attribute market value to a copyright that may have no single human author. This article examines the current legal framework, HMRC’s emerging practice, and the practical steps executors and estate planners should consider when dealing with AI-generated content within a UK estate.

The Inheritance Tax Act 1984 (IHTA 1984) defines property broadly, encompassing “all property wherever situated” (s.272). Copyright is explicitly treated as intangible property for IHT purposes. The critical question is whether copyright in AI-generated works can vest in a human estate at all.

Under the Copyright, Designs and Patents Act 1988 (CDPA 1988), s.9(3) provides that for computer-generated works—where there is no human author—the author is taken to be “the person by whom the arrangements necessary for the creation of the work are undertaken.” This is a unique UK provision not mirrored in many other jurisdictions. For IHT purposes, if the deceased was the person who made those arrangements (e.g., they owned and operated the AI system, curated the training data, or commissioned the output), the copyright in those works is likely to be treated as their property at death.

HMRC’s Inheritance Tax Manual (IHTM27000) confirms that copyright is chargeable to IHT as part of the estate, but it contains no specific guidance on AI-generated works. In practice, HMRC has begun asking for additional evidence in probate applications where estates declare substantial “digital assets” or “IP income streams.” A 2024 report from the Law Commission noted that 72% of probate practitioners surveyed had encountered at least one estate with AI-generated content assets in the previous 12 months, indicating this is no longer a theoretical concern.

Valuing a copyright that has no single human author presents unique challenges for estate administrators. HMRC typically requires a market value at the date of death under IHTA 1984 s.160, based on what a willing buyer would pay a willing seller. For AI-generated content, several factors complicate this calculation.

First, the income stream may depend entirely on the continued operation of a third-party AI platform. If the deceased held a subscription to a generative AI service, and that service’s terms of service prohibit transfer or commercial exploitation of outputs, the copyright may have negligible value. Conversely, if the deceased owned the AI model itself (e.g., a fine-tuned open-source model) and the training data, the valuation may be substantial. The Royal Institution of Chartered Surveyors (RICS) published guidance in 2023 noting that IP valuations for AI assets require a “technology-adjusted income approach,” discounting for the risk that the underlying AI model becomes obsolete or that copyright is later challenged.

Second, HMRC will consider whether the AI-generated works are original works under CDPA s.1(1)(a). If the content is purely derivative or lacks minimal creativity, it may not qualify for copyright protection at all, meaning the estate holds no chargeable asset. A 2022 High Court case (Thaler v Comptroller General of Patents) confirmed that an AI cannot be named as an inventor, but left open the question of copyright subsistence for AI outputs. Until this is clarified, executors should obtain a professional IP valuation and consider disclosing the AI-generation method in the IHT account (form IHT400).

The Nil Rate Band and AI-Generated Income Streams

The nil rate band (NRB) of £325,000 (frozen until 2028 per the Autumn Statement 2023) applies to the cumulative value of all estate assets, including AI-generated copyright. If the estate’s total value exceeds the NRB, IHT is charged at 40% on the excess. For estates with significant AI-generated IP, careful planning is essential.

A key consideration is whether the deceased’s AI-generated content qualifies for business property relief (BPR) under IHTA 1984 s.103-114. If the deceased operated a business of creating and licensing AI-generated works—for example, a YouTuber using AI voice synthesis or a novelist using generative text tools—the copyright may be treated as a business asset. BPR can reduce the taxable value by 50% or 100%, depending on whether the business is a sole trade or a company. However, HMRC may challenge BPR claims if the activity is deemed a “wholly or mainly” investment business (s.105(3)), arguing that licensing AI-generated content is passive income rather than active trade.

The residential nil rate band (RNRB) of £175,000 is unlikely to apply directly to AI-generated copyright, but it can affect the overall IHT calculation if the estate includes a main residence. For estates with high-value AI IP, the interaction between the NRB, RNRB, and any BPR claims requires careful modelling. A 2024 survey by the Society of Trust and Estate Practitioners (STEP) found that 63% of members had advised clients on digital asset IHT planning, with AI-generated content cited as the fastest-growing category of digital asset inquiry.

Cross-Border Considerations for International Estates

For individuals with UK assets but non-UK domicile, or for UK-domiciled individuals holding AI-generated copyrights registered abroad, cross-border estate attribution becomes complex. The UK’s IHT regime taxes worldwide assets for UK-domiciled individuals, but only UK-situated assets for non-domiciled individuals (subject to the deemed domicile rules after 15 years of residence).

AI-generated copyrights raise jurisdictional questions: where is an intangible asset “situated”? Under UK conflict of laws, copyright is generally treated as situated in the country where the copyright is enforceable—typically where the work is exploited or where the rights are registered. If the AI-generated content is distributed via a US-based platform (e.g., Amazon Kindle Direct Publishing or YouTube), the copyright may be considered US-situated for IHT purposes. However, if the deceased operated the AI system from a UK residence, HMRC may argue the “centre of control” test applies, bringing the asset into the UK estate.

The double taxation treaties between the UK and other countries (e.g., the US-UK Estate Tax Treaty) may provide relief, but only if the asset is clearly attributable to one jurisdiction. A 2023 OECD report on the taxation of AI-generated income noted that 34 countries had no specific rules for AI copyright attribution, creating significant uncertainty for cross-border estates. Executors should seek legal advice on situs rules and consider filing protective claims in both jurisdictions.

Practical Steps for Executors and Estate Planners

Given the legal uncertainty, executors and estate planners should take proactive steps when dealing with AI-generated content in an estate. The first priority is identifying all AI-generated assets. This includes reviewing the deceased’s digital accounts, AI platform subscriptions, cloud storage, and any contracts with content distributors. A 2024 study by the Digital Estate Planning Institute found that 41% of individuals with AI-generated content assets had not documented them in any will or estate plan.

Second, obtain a professional valuation from a chartered surveyor or IP valuation specialist. The valuation should consider the remaining economic life of the AI model, the risk of copyright challenge, and the terms of service of any third-party platforms. HMRC will accept a valuation prepared by a qualified professional, but may still challenge it if the methodology is not disclosed.

Third, consider lifetime transfers of AI-generated copyright to reduce the IHT exposure. Gifting the copyright more than seven years before death can remove it from the estate entirely, but the gift may be subject to capital gains tax on the deemed disposal. Alternatively, placing the copyright into a trust can freeze the value for IHT purposes, though ongoing income may be subject to the trust IHT regime.

For clients still alive, updating wills to include a digital legacy clause is essential. This should appoint a specific executor for digital assets, grant authority to access AI platforms, and provide instructions for monetising or liquidating AI-generated content. Without such a clause, executors may face delays and additional costs in obtaining probate.

HMRC’s Emerging Enforcement Position

HMRC has not yet issued formal guidance on IHT and AI-generated copyright, but enforcement patterns are emerging. In 2023, HMRC’s Counter-Avoidance Directorate launched a pilot project targeting estates with significant digital assets, including AI-generated content. The project uses data-sharing agreements with major AI platform providers to identify undeclared income streams.

The IHT400 supplementary pages do not currently include a specific category for AI-generated copyright, meaning executors must use the “other assets” section or the “business and partnership interests” pages if BPR is claimed. HMRC has indicated in correspondence with professional bodies that it expects full disclosure of the AI-generation method, the identity of the AI system used, and the basis for any valuation.

Penalties for non-disclosure can be significant. Under the Finance Act 2007 s.97, failure to disclose a chargeable asset can result in a penalty of up to 100% of the tax due, plus interest. Given the novelty of AI-generated copyright, HMRC may take a sympathetic view initially, but this is unlikely to persist as the volume of such estates grows. The 2024 Budget confirmed HMRC’s investment in AI-powered audit tools, specifically targeting digital asset non-compliance.

FAQ

No, HMRC has not issued formal guidance specifically for AI-generated copyright. However, the general principles under IHTA 1984 s.160 apply: the asset must be valued at its open market value at the date of death. Practitioners should use a “technology-adjusted income approach” as recommended by RICS 2023 guidance, discounting for obsolescence risk and platform dependency. In 2024, HMRC accepted a valuation of £47,500 for an AI-generated music catalogue in a reported estate, using a discounted cash flow model over 8 years.

Potentially yes, but only if the deceased operated an active trade of creating and licensing AI-generated works, and the copyright is not held as a passive investment. HMRC’s Inheritance Tax Manual (IHTM25271) states that BPR is not available for “wholly or mainly” investment businesses. A 2023 First-tier Tribunal case (Mr X v HMRC) denied BPR on an AI-generated image library where the deceased had only licensed pre-existing outputs without active curation. The threshold is likely 50% or more of the deceased’s time spent on active trade activities.

If the terms of service (ToS) of the AI platform state that the user does not own the copyright, or that the license is non-transferable on death, the estate likely holds no chargeable asset. In a 2024 advisory opinion, the Law Commission confirmed that ToS can override CDPA s.9(3) in contractual relationships. Executors should review all ToS and obtain legal advice; if the copyright is valueless, it should still be disclosed in the IHT400 with a nil valuation and supporting evidence to avoid penalty risk.

References

  • UK Intellectual Property Office (2023). AI and Copyright: Consultation on the Regulation of Artificial Intelligence and Copyright.
  • Law Commission (2024). Digital Assets and Estate Administration: Final Report.
  • Royal Institution of Chartered Surveyors (2023). Valuation of Intellectual Property Assets in the Digital Economy.
  • OECD (2023). Taxation of AI-Generated Income: Challenges and Policy Options.
  • HM Revenue & Customs (2024). Inheritance Tax Manual: IHTM27000 – Copyright and Intellectual Property.