Estate Planning for Digital Assets & Cold Wallets: A 2026 Guide

Digital assets combine ordinary succession questions with an unusual operational constraint: legal authority is not enough if the fiduciary cannot identify or access the asset. A defensible plan therefore separates ownership, authority, access, valuation and tax records instead of treating a seed phrase as the estate plan.

The Property (Digital Assets etc) Act 2025 has been in force in England and Wales since 2 December 2025. It confirms only that a thing is not prevented from being an object of personal property rights merely because it is neither a thing in possession nor a thing in action. It does not determine ownership, custody, executor access, probate procedure or tax treatment.

A digital asset estate plan should identify each wallet and account, preserve acquisition and transfer evidence, define lawful fiduciary authority, and provide a tested but secure access process. US broker reporting on Form 1099-DA does not replace those records. The applicable return depends on whether a transaction occurred before death, while the estate held the asset, or after distribution to a beneficiary.

Prerequisites

Before changing custody or succession arrangements, establish the facts that qualified advisers need to review.

Asset inventory: Record each wallet, account, asset, legal owner and custody arrangement.
Evidence record: Preserve acquisition dates, adjusted basis, transfers and supportable date of death valuations.
Legal review: Confirm the will, trust, entity documents, service contracts and fiduciary powers in each relevant jurisdiction.
Access protocol: Document how an authorised fiduciary can obtain access without placing live credentials in the will or general asset schedule.
Tax perimeter: Identify the decedent, estate and beneficiary filing jurisdictions. US connected individuals should also review potential Section 877A exposure before expatriation.

Step-by-Step Instructions

1. Conduct a Wallet by Wallet Inventory

What to do: Document every public address, exchange account, decentralised finance position and cold wallet. Separate legal ownership from technical control. Record acquisition date, adjusted basis, transfers, current value, valuation source and the evidence location for each position.

Why: TD 10000 generally treats units in separate wallets or accounts as separate holdings for US basis identification and allocation. Revenue Procedure 2024-28 provided a transition safe harbour for allocating previously universal basis records to wallets or accounts as of 1 January 2025. These are taxpayer basis rules, not a rule that every wallet reports to the IRS.

Qualifying US brokers generally began gross proceeds reporting for 2025 sales on Form 1099-DA, with 2025 statements furnished in early 2026. Mandatory broker basis reporting generally begins for dispositions on or after 1 January 2026 of qualifying covered digital assets, principally assets acquired on or after that date in an account for which the broker provides custodial services. Assets transferred from self custody can lack broker reported basis. Missing records can therefore create basis substantiation and valuation disputes, but there is no automatic rule treating every estate position as having no basis.

Illustrative estate inventory:

Record	Relevant details	Evidence to preserve
Self custody wallet	Public address, asset, quantity and legal owner	Acquisition records, transaction history and secure access reference
Custodial account	Institution, account owner and assets	Statements, contracts and deceased customer procedure
Decentralised position	Protocol, network, address and legal owner	Transaction hashes, contracts and valuation method
Entity owned wallet	Entity, authorised signers and assets	Governing documents, resolutions and custody records

The inventory should never contain an unencrypted seed phrase or private key. Review frequency and access controls should reflect the portfolio and the governing documents rather than a universal timetable.

2. Establish the Technical Custody Protocol

What to do: Choose a custody arrangement that the legal owner and authorised fiduciary can operate. Options include a single signature wallet with a separately protected recovery process, a multisig arrangement, secret sharing, or a contractual custodian. No one model is a universal fiduciary requirement.

Why: A single lost credential can make self custodied assets inaccessible. A more complex arrangement can also fail if signers, devices, software or instructions are unavailable. The plan should therefore test both unauthorised access risk and recovery risk.

Illustrative two of three arrangement:

One signer is available to the owner for authorised transactions.
A second signer is controlled under a documented fiduciary or professional custody arrangement.
A third signer is held independently as a recovery route.

The governing documents must identify who can direct each signer and what evidence activates succession authority. The illustration is not a recommendation to use a named provider or to give an executor immediate signing power. Counsel should confirm that the arrangement matches legal ownership and applicable fiduciary duties.

3. Align Legal Ownership and Succession Authority

What to do: Record whether each asset is owned personally, by a trust, by a foundation or by a company. Do not transfer an asset to a wrapper merely because it is digital. A transfer can change tax, reporting, fiduciary and creditor consequences.

Why: Cryptographic control and legal ownership are separate questions. The contract with an exchange or custodian can also determine what evidence a personal representative must provide.

The jurisdictional boundaries are precise:

England and Wales: The Property (Digital Assets etc) Act 2025, in force since 2 December 2025, states that a thing is not prevented from being an object of personal property rights merely because it is neither a thing in possession nor a thing in action. The Act does not classify every digital thing as property and does not create crypto probate procedures. Whether a grant is needed for a particular act depends on ordinary succession law, title, contracts and the institution's procedure.
United States: IRS Notice 2014-21 treats convertible virtual currency as property for federal income tax purposes. That notice does not establish probate access or state fiduciary authority. Federal returns and state succession mechanics must be analysed separately.
Other jurisdictions: Situs, governing law, succession authority and custody contracts remain fact specific. A structure should not be described as cleaner or more tax efficient without advice addressing those facts.

A useful annex to a will, trust or entity record can identify wallets, legal owners, signers, valuation evidence and the location of access instructions. The annex should not expose live credentials.

4. Define the US Tax Filing Perimeter

What to do: Distinguish the decedent's final individual return, the estate's income tax return, any estate tax return and the beneficiary's later returns. Preserve evidence showing who owned an asset and when any disposal occurred.

Why: There is no special federal digital asset executor return. The personal representative generally reports the decedent's income through death on the final Form 1040. A domestic estate generally files Form 1041 if it has at least USD 600 of gross income for the tax year or a nonresident alien beneficiary. Form 706 applies only when its filing test is met or an election such as portability makes filing appropriate.

Mere inheritance or movement to an estate controlled wallet is not automatically a sale on Form 8949. A pre death disposal belongs on the decedent's return. A post death sale by the estate is generally reported through Form 1041 and Schedule D, with Form 8949 where required. A sale after distribution belongs on the beneficiary's return.

Section 1014 generally provides fair market value basis at death, subject to exceptions. An alternate valuation election under Section 2032 and the estate tax basis consistency rules can change the relevant value. This is not a universal promise of a basis increase.

For a covered expatriate, Section 877A can apply a separate deemed sale on the day before expatriation. Our analysis of covered expatriate status addresses that regime without assuming one universal tax rate.

5. Test Access and Liquidity Separately

What to do: Create a controlled recovery exercise that does not disclose production credentials. Confirm that authorised people can locate the inventory, prove authority to each custodian, assemble the required signers and identify the records needed for valuation and filing.

Why: An automated inactivity trigger is not proof of death or legal authority. It can also release credentials after illness, travel or operational error. Any technical trigger should therefore sit behind the legal process and the custody contract rather than replace them.

Liquidity planning should begin only after the likely filing and payment obligations are identified. Credit, sale and in specie distribution each create different legal and tax consequences. No lender or staged distribution should be presented as a standard estate solution.

Custodian Review Questions

Institutional custody is one option, not a legal requirement at a stated portfolio value. Product scope, insurance, regulatory status and deceased customer procedures change over time. Obtain current contractual answers to these questions:

Who is the legal account holder and who has authority after death or incapacity?
What evidence must a personal representative provide?
Can the custodian report acquisition basis for assets transferred from self custody?
What assets, networks and transactions fall outside its reporting?
What happens if a signer, device, service or supported network becomes unavailable?
What insurance exclusions and liability limits apply?

Legal authority, technical access and tax evidence are separate controls. A plan is incomplete until all three can be demonstrated.

Common Mistakes to Avoid

Treating access as ownership: Possession of a credential does not establish authority to transfer the asset.
Treating Form 1099-DA as a complete ledger: A broker statement can omit basis, particularly for 2025 transactions or assets transferred from self custody.
Conflating basis rules with transaction visibility: Wallet or account basis records do not mean every self custody or peer to peer transaction is broker reported.
Relying on TD 10021: Congress disapproved the decentralised finance broker rule through Public Law 119-5 on 10 April 2025. It has no force or effect, and Treasury removed its text from the Code of Federal Regulations effective 11 July 2025.
Assuming one return reports every asset: Filing follows ownership and transaction timing.
Moving assets before reviewing consequences: Trust, company and cross border transfers can create tax and reporting consequences rather than remove them.

Expected Results

A completed plan should give the personal representative a supportable asset inventory, a route to establish legal authority, a secure access process and records for the returns that actually apply. It cannot guarantee access, tax savings or acceptance by a custodian.

Next Steps

Have succession counsel, tax advisers and custody specialists review the same inventory. Resolve inconsistencies between legal ownership, account contracts, signer authority and tax records before testing recovery.

FAQ Section

Does inheritance itself require Form 8949? No. Mere inheritance or movement into an estate controlled wallet is not automatically a sale. A pre death disposal belongs on the decedent's final return. A post death sale by the estate is generally reported through Form 1041 and Schedule D, with Form 8949 where required. A sale after distribution belongs on the beneficiary's return.

What basis applies to inherited digital assets? Section 1014 generally uses fair market value at death, subject to statutory exceptions. An alternate valuation election under Section 2032 and the basis consistency rules can affect the amount. Fiduciaries should retain the valuation method and supporting market data.

Does Form 1099-DA report every wallet and basis amount? No. Qualifying brokers generally report gross proceeds for covered 2025 sales. Mandatory broker basis reporting generally begins for qualifying covered digital assets acquired on or after 1 January 2026. A broker can lack reportable basis for assets moved from self custody, and self custody itself does not issue a Form 1099-DA.

What did the Property (Digital Assets etc) Act 2025 change? It removed one potential obstacle to recognising a thing as an object of personal property rights in England and Wales. It did not classify every digital asset as property or establish ownership, probate, custody, private key or tax rules.

Must every executor obtain a grant before accessing digital assets? The 2025 Act creates no such universal rule. The answer depends on ordinary succession law, legal title, the relevant contract, the institution's procedure and the act the fiduciary proposes to take.

How does Section 877A interact with cold wallets? Digital assets can fall within the general mark to market regime when their owner is a covered expatriate, subject to the statute's classifications and exceptions. Custody in a cold wallet does not itself change that analysis. See our covered expatriate guide for the current tests.

Primary Sources

The analysis is informational and does not replace legal or tax advice based on the governing documents and complete facts.