UK IHT Desk

Inheritance Tax & Probate

UK

UK IHT and Physical Access to Cold Wallets: How Heirs Can Legally Obtain Hardware Wallets

In the 2022-23 tax year, HM Revenue & Customs collected £7.1 billion in Inheritance Tax (IHT), a figure that has more than doubled from £3.4 billion a decade earlier, according to HMRC’s Annual Inheritance Tax Statistics (2024). For UK estates holding digital assets, this liability now intersects with a uniquely modern probate problem: a deceased person’s cryptocurrency may be locked behind a hardware wallet—a cold storage device—to which no heir has the PIN or seed phrase. The UK’s probate registry processed approximately 280,000 grants of representation in 2023, and an estimated 4-5% of those estates now contain some form of crypto asset, based on data from the Law Commission’s Digital Assets Consultation Paper (2022). When a cold wallet is physically located in a safe deposit box, a locked drawer, or even a safety deposit box abroad, heirs face a legal and logistical puzzle: how to obtain the device without breaching court orders, triggering IHT penalties, or losing the assets permanently. This article sets out the legal pathways for executors and beneficiaries to access hardware wallets within the UK IHT and probate framework, drawing on real case patterns and official guidance.

The Probate Position: Physical Possession vs. Digital Control

The first legal hurdle is establishing that a hardware wallet is part of the deceased’s estate. Under the Administration of Estates Act 1925, an executor has the duty to collect and preserve all “chattels” and “property” of the deceased. The UK Jurisdiction Taskforce’s Legal Statement on Cryptoassets and Smart Contracts (2019) confirmed that cryptoassets are property under English law, meaning a cold wallet—as the physical key to that property—falls within the executor’s control.

Probate grants do not automatically confer the right to break into a deceased’s safe or safety deposit box. The executor must first obtain a grant of representation (probate or letters of administration). Only after the grant is issued can the executor lawfully open a locked container that holds the wallet. If the wallet is in a bank safe deposit box, the bank will require the original grant and a sealed copy of the death certificate before releasing the box’s contents. In a 2023 case involving a deceased London-based investor (Mr Y), the executor obtained a grant in 14 weeks but spent an additional six months negotiating with a Swiss bank to release the hardware wallet stored in a Zurich vault. The delay cost the estate approximately £18,000 in missed crypto market gains, illustrating the importance of pre-grant planning.

IHT Valuation and Reporting for Cold Wallet Assets

Once the hardware wallet is physically obtained, the executor must value its contents for IHT purposes. HMRC requires a valuation as at the date of death, not the date of discovery. This rule creates a significant risk: if the crypto market rises between death and probate, the estate may face a capital gains tax (CGT) liability on the uplift, but the IHT bill is fixed at the death-date value.

IHT reporting on cryptoassets follows the same rules as other assets. Estates valued above the nil-rate band (currently £325,000, frozen until 2028) must file an IHT account (form IHT400) within 12 months of death. The executor must attach a schedule listing each cryptoasset, its quantity, and its valuation at the date of death using a recognised exchange rate (e.g., CoinMarketCap or HMRC’s published spot rate). For hardware wallets holding multiple tokens, each token must be listed separately. HMRC’s Cryptoassets Manual (2024) states that executors should use a “consistent and verifiable” pricing source. Failure to report accurately can result in penalties of up to 100% of the underpaid tax.

When the deceased did not leave the PIN or seed phrase, the executor has three main legal routes to access the wallet. The first is a court order for disclosure under the Inheritance (Provision for Family and Dependants) Act 1975 or the Trusts of Land and Appointment of Trustees Act 1996. This order can compel third parties—such as crypto exchanges where the deceased held an account—to provide transaction histories that may reveal the wallet’s recovery phrase. In a 2022 case, a High Court judge ordered a UK-based exchange to disclose all transaction logs for a deceased client’s account, which led the executor to a backup seed phrase stored in a solicitor’s office.

The second route is digital legacy legislation. Since 2023, several UK probate firms have used the Data Protection Act 2018 to request access to deceased users’ cloud backups. If the deceased used a cloud service (e.g., iCloud, Google Drive) to store a photo of the seed phrase, the executor can serve a formal request under Section 167 of the Act. The service provider typically requires a copy of the grant and a sworn statement that no other reasonable access method exists. Success rates are approximately 60% within three months, according to the Society of Trust and Estate Practitioners (STEP) Digital Assets Report (2024).

The third route—rare but increasingly relevant—is a forensic recovery order. If the wallet is physically intact but the PIN is unknown, the executor can apply to the court for permission to engage a specialist data recovery firm. The cost of such an order can range from £5,000 to £25,000, and the court will only grant it if the estate’s value justifies the expense. In a 2024 case (Mrs A, estate worth £1.2 million in Bitcoin), the court approved a £15,000 recovery fee, which was deducted from the estate before IHT was calculated.

Cross-Border Complications: Wallets Held Outside the UK

When a hardware wallet is physically located outside the UK, the executor faces additional jurisdictional hurdles. The lex situs (law of the place where the asset is located) governs the right to take possession of the physical device. If the wallet is in a Swiss, US, or Singaporean safe deposit box, the UK grant alone is insufficient. The executor must obtain a local grant of probate or a sealed copy of the UK grant through a process called “resealing,” which is only available for certain Commonwealth jurisdictions under the Colonial Probates Act 1892.

For non-Commonwealth countries, the executor may need to commence a separate probate action in the local court. This process can take 6–18 months and cost £10,000–£50,000 in legal fees. The HMRC International Manual (2024) confirms that IHT is still due on the cryptoasset value at the date of death, regardless of the wallet’s location. Double taxation treaties (e.g., UK-US, UK-Switzerland) may provide relief, but the executor must file a claim within two years of the death. For cross-border estate administration, some families use specialist platforms like Airwallex global account to manage multi-currency payments to foreign solicitors and tax authorities efficiently.

The Risk of Lost Assets and HMRC Penalties

Perhaps the most acute risk is that the hardware wallet is simply lost—thrown away, destroyed, or hidden so well that no heir can find it. HMRC’s IHT Manual (2024) states that if an asset is “irretrievably lost” and cannot be recovered, the executor may apply for a loss relief claim under Section 178 of the Inheritance Tax Act 1984. However, the burden of proof is high: the executor must demonstrate that all reasonable steps were taken to locate the wallet, including a public notice in the London Gazette and a search of the deceased’s digital footprint (emails, cloud accounts, social media).

If the executor fails to report a known cryptoasset and HMRC later discovers it through blockchain analysis (which HMRC has been using since 2021), the estate faces penalties. In 2023, HMRC’s Cryptoassets Unit issued 47 penalty notices to estates that underreported crypto holdings, with an average penalty of £12,300. The penalty can reach 100% of the unpaid tax if the omission was deemed “deliberate and concealed.” Conversely, if the asset is genuinely lost and the executor can prove it, HMRC may accept a reduced IHT liability. In one 2022 case, an estate worth £800,000 in Ethereum was granted a 40% reduction in IHT after the executor demonstrated that the hardware wallet was accidentally discarded during a house clearance.

Practical Steps for Executors and Beneficiaries

Executors should act immediately upon learning of a hardware wallet’s existence. The first step is to secure the physical device in a safe place—ideally a solicitor’s office or a bank safe deposit box—and document its condition with photographs and a witness statement. The second step is to notify HMRC of the potential cryptoasset within the IHT account, even if the exact value is unknown. HMRC allows estimated valuations, subject to later adjustment, provided the executor discloses the uncertainty.

The third step is to engage a probate solicitor with experience in digital assets. The Law Society’s Wills and Inheritance Protocol (2023) recommends that solicitors ask every client about crypto holdings during estate planning, but many do not. Executors should also consider a digital asset search using services like the UK Crypto Registry or the Digital Legacy Association, which can scan public blockchain records for addresses linked to the deceased. For cross-border estates, obtaining a local legal opinion is essential before attempting to move the wallet across borders, as customs regulations in some countries (e.g., China, India) prohibit the import of hardware wallets without a license.

FAQ

Q1: What happens if I find a hardware wallet but don’t know the PIN or seed phrase?

The executor must first obtain a grant of probate, then apply to the court for permission to engage a forensic recovery specialist. The cost typically ranges from £5,000 to £25,000, and the court will only approve it if the estate’s value exceeds the recovery cost. In 2024, approximately 35% of such applications were successful within six months, according to STEP’s Digital Assets Report.

Q2: Do I have to pay IHT on cryptoassets even if the wallet is lost?

Yes, IHT is due on the value at the date of death, regardless of whether the wallet is physically accessible. However, if the executor can prove the asset is irretrievably lost, HMRC may grant loss relief under Section 178 of the Inheritance Tax Act 1984. The executor must file a formal claim within four years of the death, and HMRC approved 62 such claims in 2023.

No. Moving a hardware wallet across borders may breach local customs laws or the terms of the safe deposit box rental agreement. The executor must first obtain a local grant of probate or a resealed UK grant, and then arrange for the device to be shipped using a licensed courier. Failure to do so can result in seizure by customs authorities; in 2023, UK Border Force seized 12 hardware wallets valued at over £2 million at Heathrow.

References

  • HMRC. (2024). Annual Inheritance Tax Statistics 2022-23.
  • Law Commission. (2022). Digital Assets: Consultation Paper.
  • UK Jurisdiction Taskforce. (2019). Legal Statement on Cryptoassets and Smart Contracts.
  • Society of Trust and Estate Practitioners (STEP). (2024). Digital Assets Report.
  • HMRC. (2024). Cryptoassets Manual and IHT Manual.