Crypto and Digital Assets: The Inheritance Tax Problem Most Wills Don't Cover
Cryptocurrency, NFTs and other digital assets form part of your taxable estate for Inheritance Tax just like any other asset — but without the right information, executors may never even find them. How to plan properly.
A modern estate planning gap
Most wills and estate plans were designed around a world of bank accounts, property, and share portfolios — all assets with a paper trail, a customer service department, and a way for an executor to prove entitlement and gain access. Cryptocurrency and other digital assets often have none of these things, particularly when held in a self-custody wallet secured purely by a private key or seed phrase that only the owner knows. This creates a genuine, and increasingly common, estate planning gap.
The tax position is actually the simpler part
Cryptocurrency held at death is included in your estate for Inheritance Tax purposes at its market value on the date of death, subject to the normal nil-rate band, residence nil-rate band (where applicable), and the standard 40% rate above the available allowances — conceptually no different to how listed shares or other investments are treated.
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- Valuation volatility — cryptocurrency prices can move very significantly even within the timeframe of an estate administration, so executors need a clear, defensible valuation methodology and date.
- Capital Gains Tax on lifetime gifts — gifting crypto to anyone other than a spouse or civil partner during your lifetime is generally treated as a disposal for Capital Gains Tax purposes at that point, separate from and in addition to the later Inheritance Tax question of whether the gift falls outside your estate after seven years.
The access problem: the real risk
This is where digital assets diverge sharply from traditional assets, and where most poor planning causes genuine, irreversible loss rather than just a tax inefficiency.
If cryptocurrency is held in a private, self-custody wallet, access depends entirely on knowing the private key or seed phrase. There is no central registry, no customer service line, and no legal process that can recover access if this information is lost — a fundamental design feature of how these systems work, not a bug or an oversight. If the deceased didn't leave secure, accessible instructions, the assets can be permanently and irretrievably lost, regardless of how carefully the rest of the estate was planned or how much Inheritance Tax was correctly calculated on paper.
By contrast, crypto held on a centralised exchange is generally more like a conventional investment account — the exchange holds records of the account, and typically has its own (though often lengthy and document-heavy) process for verifying an executor's entitlement and releasing the assets to the estate.
| Storage type | Executor access difficulty |
|---|---|
| Centralised exchange account | Moderate — exchange has records and a formal release process |
| Self-custody wallet (seed phrase/private key) | High — no recovery mechanism if information is lost |
| Hardware wallet with recorded recovery phrase (securely stored) | Moderate — depends entirely on the security and accessibility of the stored recovery information |
Why you should never put a seed phrase in your will
A will becomes a public document once probate is granted — anyone can obtain a copy from the Probate Registry. Writing a seed phrase or private key directly into the will itself would effectively publish the keys to your crypto assets for anyone to see and potentially steal, well before (and after) your executors even get round to using them. This is a serious, avoidable security risk.
Instead, most estate planning advisers recommend:
- A separate, secure letter of wishes, referenced by the will but not forming part of the public probate document, containing (or pointing to) the access information.
- A dedicated secure digital asset storage solution — some specifically designed for this purpose — that releases access information to a nominated person only after verified proof of death.
- Clear instructions to executors about what digital assets exist and where to look, even if the sensitive access details themselves are stored separately and securely.
Practical steps for anyone holding meaningful crypto or digital assets
- Keep a clear, private (not public) record of what digital assets you hold and roughly where — exchange accounts, wallet types, associated devices — so executors know what to look for.
- Never record seed phrases or private keys in your will. Use a secure, separate mechanism instead.
- Consider a specialist digital asset estate planning service or solicitor experienced in this specific area, rather than assuming a generic will-writing service has this covered.
- Review and update the arrangement periodically, particularly if you move assets between wallets or exchanges, since an out-of-date record is nearly as risky as no record at all.
- Discuss lifetime gifting carefully with a tax adviser if you're considering it, given the combined Capital Gains Tax and Inheritance Tax implications working alongside each other, not in isolation.
The Inheritance Tax treatment of crypto is conceptually straightforward. The genuine risk — permanent, irreversible loss of the underlying asset because no one else can access it — is the part that demands real, deliberate planning, and it's a gap that a huge number of otherwise carefully prepared wills simply don't address.
Frequently asked questions
Is cryptocurrency subject to Inheritance Tax in the UK?
Yes. Cryptocurrency held at death forms part of your estate for Inheritance Tax purposes in the same way as cash, shares, or property, valued at its market value on the date of death, and is subject to the normal Inheritance Tax rules, allowances and the standard 40% rate above the available nil-rate bands.
What's the biggest practical risk with inheriting crypto assets, beyond the tax itself?
The most common and serious risk is simply that the assets are never found or accessed at all — cryptocurrency held in a private wallet secured by a seed phrase or private key has no central registry or customer service line to contact; if the deceased didn't leave clear, secure instructions for accessing the wallet, the assets can be permanently and irretrievably lost, regardless of how much Inheritance Tax planning was otherwise done.
Should I record my crypto wallet passwords and seed phrases in my will?
No — a will becomes a public document once probate is granted, so recording sensitive access information like seed phrases or private keys directly in the will itself creates a serious security risk. Instead, most advisers recommend a separate, secure letter of wishes or dedicated secure storage solution, referenced in the will but not disclosing the sensitive details within it.
Do executors have to report crypto assets to HMRC as part of probate?
Yes — executors are required to identify and value all estate assets, including cryptocurrency and other digital assets, as part of the probate and Inheritance Tax reporting process, and should take professional advice on obtaining a reliable valuation at the date of death given the potential volatility of crypto asset prices.
How is cryptocurrency valued for Inheritance Tax purposes?
Generally at its market value in pounds sterling on the date of death, similar in principle to how listed shares are valued — given the volatility of many cryptocurrencies, executors should keep clear records of the specific valuation methodology and source used, since HMRC can query valuations as part of the probate process.
Does gifting crypto during your lifetime work the same way as gifting other assets for IHT purposes?
In principle, yes — a gift of cryptocurrency can be a potentially exempt transfer, falling outside your estate if you survive seven years, subject to the same general gifting rules that apply to other assets. However, gifting also triggers a separate Capital Gains Tax question at the point of the gift, since transferring crypto to someone other than a spouse or civil partner is generally treated as a disposal for CGT purposes, distinct from the later Inheritance Tax position on death.
What happens to crypto held on an exchange rather than in a private wallet?
Crypto held on a centralised exchange (rather than in a self-custody private wallet) generally has a more conventional process for executors to deal with, similar in principle to accessing a bank or investment account, since the exchange itself holds records of the account and typically has its own process for verifying and releasing assets to an estate — though executors should still expect this to require specific documentation and can take time.
Should I use a specialist digital asset estate planning service?
Given how easily crypto and other digital assets can be permanently lost without proper planning, and the genuine complexity around securely recording access information, many people with significant digital asset holdings do use specialist services or solicitors experienced specifically in digital asset estate planning, rather than relying solely on a generic will-writing service unfamiliar with the practical access issues involved.
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