Crypto Estate Planning Solutions Compared

Crypto Estate Planning Overview

An estimated 3 to 4 million BTC are permanently lost, and the rate of coins aging into "ancient" status (10+ years untouched) now exceeds the rate of new issuance. Only about 17% of crypto holders have documented any inheritance instructions. The result: billions of dollars in digital assets become inaccessible every year because holders die, become incapacitated, or simply lose access without a recovery plan.

Unlike traditional bank accounts, cryptocurrency has no "forgot password" flow and no institution that can override access controls. Self-custody means the holder is solely responsible for ensuring that keys survive them. Estate planning for crypto requires solving two problems simultaneously: preventing unauthorized access during the holder's lifetime, and guaranteeing authorized access after death.

The following table summarizes the major approaches to crypto estate planning, from fully managed custodial services to raw cryptographic schemes.

For a product-focused comparison of specific inheritance services, see our Bitcoin inheritance solutions comparison.

Collaborative Custody Inheritance Services

Collaborative custody providers like Casa and Unchained hold one key in a multisig arrangement while the user holds the rest. This structure allows the provider to assist with inheritance transfers without ever having unilateral access to funds.

Casa

Casa includes inheritance on all membership tiers. The Standard plan ($250/year) uses a 2-of-3 multisig vault, while the Premium plan ($2,100/year) uses a 3-of-5 vault with dedicated hardware devices. When a beneficiary submits a claim, a 6-month waiting period begins during which the account holder can deny the claim. If unchallenged, Casa assists in transferring access. The Private Client tier adds verified identity documentation and includes a 75-minute consultation with an estate attorney.

One concern with Casa's model: the company generates and encrypts the mobile decryption key, which theoretically gives Casa access to both the mobile key and their own server key. Beneficiaries must also create a Casa account upfront, which prevents the use of professional trustees or minor beneficiaries.

Unchained

Unchained uses 2-of-3 collaborative multisig where the client holds 2 keys and Unchained holds 1. Upon the holder's death, Unchained walks executors or beneficiaries through the transfer process. A key feature is transfer-on-death (TOD) beneficiary designations for vaults, which bypass state probate. Standard vaults cost $250/year. The Inheritance Boot Camp ($4,000 first year, $4,500/year renewal) includes advisory meetings, estate gap analysis, and trust vault setup. Note that Unchained is currently unavailable in New York, New Jersey, South Dakota, and North Carolina.

Multisig Time-Locked Inheritance

Time-locked inheritance combines OP_CHECKSEQUENCEVERIFY (CSV) or OP_CHECKLOCKTIMEVERIFY (CLTV) with multisig spending policies. The owner's key can always spend. A recovery key held by heirs becomes valid only after a specified period of inactivity. The owner periodically moves Bitcoin to reset the timer, and if they stop (due to death or incapacitation), the timelock expires and the heir's key activates.

This approach is enabled by Miniscript, a structured language for composing Bitcoin spending policies. A typical inheritance policy might read: "2-of-3 multisig normally, but after 52,560 blocks (~1 year), a single recovery key can spend." Miniscript has been supported in Bitcoin Core since version 25.0.

Liana Wallet

Liana is an open-source Bitcoin wallet built specifically around Miniscript spending policies. It implements inheritance via an owner key plus a CSV-timelocked recovery key. Liana is free with no monthly fees and no third party holding keys. The wallet descriptor is portable to any Miniscript-compatible software, which means heirs are not locked into Liana to recover funds. The wallet tracks timelocks and alerts the owner when a refresh deadline approaches.

Nunchuk Honey Badger

Nunchuk offers autonomous on-chain inheritance through its Honey Badger subscription (approximately $430-$480/year). It uses a 2-of-4 multisig with Miniscript-based timelocks. The owner sets a timelock of 1-2 years plus an optional buffer period of 7-30 days. After the timelock expires, Nunchuk's platform key is automatically removed from the spending policy, giving the beneficiary sole control. Nunchuk launched this autonomous on-chain inheritance feature (Nunchuk 2.0) in November 2025.

The main tradeoff of timelocked schemes is operational discipline: the owner must periodically execute a refresh transaction to reset the timer. Failure to refresh for reasons other than death (extended travel, hospitalization, forgotten wallet) could give heirs premature access. For a deeper look at timelock mechanics, see our guide on Bitcoin timelocks: CLTV and CSV.

Shamir's Secret Sharing for Heirs

Shamir's Secret Sharing (SSS) splits a secret into N shares where any K shares (the threshold) can reconstruct the original, but fewer than K shares reveal nothing about the secret. The SLIP-0039 standard, formalized in 2017, standardizes this scheme for cryptocurrency seed phrase backups. Each share is encoded as a list of 20 words.

Common inheritance configurations include 2-of-3 (owner, spouse, attorney: any two can recover) and 3-of-5 (distributed across owner, spouse, attorney, safe deposit box, and a trusted friend for higher redundancy). Trezor Safe 5, Safe 3, and Model T all support native Shamir Backup, and as of mid-2024, Shamir backup is the default method for the Trezor Safe family. Recovery is supported by third-party wallets including Electrum and BlueWallet.

SSS protects the backup, not the spending policy. Once shares are combined, the holder has full, unrestricted access. There are no time-based protections and no way to revoke a share without generating an entirely new set. Heirs must also understand how to use shares to reconstruct a seed and recover funds, which imposes a technical knowledge requirement. For details on configuring Shamir backups, see our research on Shamir's Secret Sharing for Bitcoin backup.

Social Recovery Wallets

Social recovery wallets use smart contracts to enable a group of designated guardians to collectively restore access. A primary key handles daily transactions, while a set of trusted guardians (typically 3 or more) can authorize wallet recovery by majority vote. Argent, the most prominent implementation, allows users to designate friends, family members, hardware wallets, or Argent's own service as guardians. Recovery involves a 36-hour security window during which the owner can cancel, after which majority guardian approval grants access to a new device.

For inheritance, guardians can be pre-designated family members who collectively recover the wallet after the holder's death. However, social recovery was designed for account recovery, not inheritance. Guardians must remain trustworthy, available, and technically capable for decades. Losing contact with a majority of guardians makes recovery impossible. Social recovery is also limited to Ethereum and EVM chains: it does not work for Bitcoin. The approach carries smart contract risk and incurs gas costs for on-chain recovery operations.

Dead Man's Switch Protocols

A dead man's switch releases encrypted information (such as seed phrases or private keys) to designated recipients after a period of inactivity. The holder must periodically "check in" to prevent the release.

Sarcophagus is a decentralized dead man's switch built on Ethereum and Arweave. Users encrypt their secrets and store them permanently on Arweave, setting a resurrection window that they must periodically re-wrap. Third-party node operators called Archaeologists are paid in SARCO tokens to maintain the network and execute resurrections when timelocks expire. The model has significant fragility: if SARCO token value collapses, the incentive structure for Archaeologists breaks. The protocol received a C audit rating, and its active usage and network health in 2026 remain uncertain.

Simpler alternatives exist. Google Inactive Account Manager is a free dead man's switch that can notify up to 10 contacts after 3, 6, 12, or 18 months of account inactivity. Holders can store an encrypted seed phrase in their Google account for release to designated contacts. However, Google holds the encryption keys (not zero-knowledge), and the service was not designed for cryptocurrency. Kresus launched a crypto inheritance service in July 2026 at $99.99/year that names a beneficiary and releases holdings after a predefined inactivity period.

The core failure mode of all dead man's switch protocols is the tension between security and liveness: too short an inactivity window risks premature release (if the holder is simply traveling or hospitalized), while too long a window delays access for legitimate heirs.

Legal Crypto Trusts

A legal trust can hold digital assets just like any other property, but operational access is the critical challenge. The Revised Uniform Fiduciary Access to Digital Assets Act (RUFADAA), drafted by the Uniform Law Commission in 2015, governs a fiduciary's authority to manage digital assets and has been adopted by 47+ states. However, RUFADAA does not automatically grant trustees access to private keys or exchange accounts. Without explicit account-level authorization in the trust instrument, a trustee may be legally empowered but operationally locked out.

Wyoming leads in crypto-specific trust law. Its 2021 Digital Asset Statutory Trust Act explicitly recognizes cryptocurrency as trust property with clear custodial rules. Wyoming allows self-settled trusts (where the settler can also be the beneficiary), imposes no state income or capital gains tax, and offers strong privacy protections. South Dakota, Nevada, and Delaware also have favorable digital asset trust frameworks.

A well-drafted crypto trust should explicitly list digital asset holdings, specify how private keys are stored, name a digital executor or crypto-savvy trustee, and include operational instructions for accessing wallets. Setup costs typically range from $2,000 to $10,000+ depending on legal complexity. Trusts are most effective when combined with a technical solution (multisig, SSS, or collaborative custody) that gives the trustee operational access. For comprehensive planning guidance, see our Bitcoin inheritance planning guide.

Detailed Feature Comparison

The following table compares specific products across cost, key structure, Bitcoin support, and whether they require ongoing maintenance from the holder.

Avoiding Single Points of Failure

The most common cause of crypto inheritance failure is a single point of failure: one seed phrase in a safe, one hardware wallet with one PIN, one person who knows the password. Effective estate planning eliminates every single point of failure across three dimensions:

• Key redundancy: no single device, document, or person should be sufficient to access or lose the funds. Multisig and Shamir splitting address this directly.
• Knowledge transfer: heirs must know that crypto exists, where to find recovery materials, and how to use them. A letter of instruction stored with estate documents (but separate from keys) is essential.
• Institutional independence: the plan should survive the failure of any single company. If a custody provider shuts down, can heirs still recover? Liana's portable wallet descriptors and Trezor's SLIP-39 shares are examples of company-independent designs.

The strongest approaches layer multiple solutions: a legal trust defines who inherits, a multisig or Shamir scheme protects the keys, and a letter of instruction bridges the knowledge gap. For additional context on multisig configurations, see our multisig wallets explained guide.

The Legal Landscape for Digital Asset Inheritance

US estate law is evolving to accommodate digital assets, but gaps remain. RUFADAA provides the legal foundation in most states, establishing that fiduciaries can access digital accounts. However, the law distinguishes between digital assets (the content) and the accounts that hold them, and terms of service for exchanges and wallets can override fiduciary access rights.

The federal estate tax exemption was permanently set at $15 million per individual ($30 million for married couples) starting January 1, 2026, under the One Big Beautiful Bill Act signed in July 2025. This is significant for crypto holders with large positions, as the previous exemption was scheduled to drop to roughly $7 million. Separately, the GENIUS Act, signed into law on July 18, 2025, establishes a regulatory framework for USD-backed payment stablecoins, providing legal clarity for stablecoins held in estates.

For Bitcoin holders using cold storage, the most practical approach is to pair a legal framework (trust or will with digital asset provisions) with a technical access mechanism (multisig, Shamir shares, or a collaborative custody service). Neither legal authority alone nor technical access alone is sufficient: both are required.

How to Choose an Estate Planning Approach

If you hold under $50,000 in crypto and want simplicity: a Trezor with Shamir Backup (2-of-3 shares distributed to trusted parties) combined with a letter of instruction is the most cost-effective option. There are no recurring fees, and the SLIP-39 standard ensures shares are portable across compatible wallets.

If you hold $50,000 to $500,000 and want managed assistance: Casa Standard ($250/year) or Unchained ($250/year) provides collaborative custody with built-in inheritance workflows. The provider handles the operational complexity while the multisig structure prevents any single party from accessing funds.

If you hold $500,000+ or need maximum sovereignty: Liana Wallet (free) or Nunchuk Honey Badger (~$480/year) provides on-chain timelocked inheritance with no custodial dependency. Combine with a Wyoming digital asset trust and a crypto-savvy estate attorney for full legal coverage.

If you hold assets across multiple chains including Ethereum: consider social recovery via Argent or a similar ERC-4337 smart wallet for EVM-based assets, plus a Bitcoin-specific solution for BTC holdings. Layer 2 solutions like Spark can simplify the Bitcoin side by enabling faster, lower-cost transfers when heirs eventually move inherited funds.

Frequently Asked Questions

What happens to my Bitcoin when I die?

Without a plan, your Bitcoin becomes permanently inaccessible. Unlike bank accounts, there is no institution that can reset access or transfer funds to heirs. If private keys are lost, the Bitcoin remains on-chain forever but can never be spent. An estimated 3 to 4 million BTC are already permanently lost, much of it from early holders who died or lost access without backup plans.

Can I put Bitcoin in a trust?

Yes. Most US states recognize cryptocurrency as property that can be held in a trust under RUFADAA, which has been adopted by 47+ states. The trust document must explicitly address digital assets and provide operational instructions for key access. Wyoming's Digital Asset Statutory Trust Act (2021) is the most crypto-specific framework, explicitly recognizing cryptocurrency as trust property. A trust provides legal authority, but you still need a technical mechanism (multisig, Shamir shares, or a custody service) so the trustee can actually access the funds.

What is the best Bitcoin inheritance solution?

There is no single best solution. Casa and Unchained are the simplest for non-technical users, combining multisig security with managed inheritance workflows. Liana Wallet and Nunchuk provide on-chain sovereignty with no company dependency but require the owner to periodically refresh timelocks. Shamir's Secret Sharing is the most cost-effective (no recurring fees) but relies on share holders to safeguard their pieces. The right choice depends on your holdings size, technical comfort, and whether you prioritize convenience or sovereignty.

How does a crypto dead man's switch work?

A dead man's switch requires the holder to periodically "check in" (via a transaction, a login, or an explicit confirmation). If the holder fails to check in within a preset window, the system assumes they are dead or incapacitated and releases encrypted information to designated beneficiaries. Products like Sarcophagus and Kresus implement this model. The main risk is premature triggering if the holder is simply unavailable, which is why most implementations use inactivity windows of 6 months or longer.

Is Shamir's Secret Sharing safe for Bitcoin inheritance?

SSS is cryptographically sound: below the threshold, shares reveal zero information about the secret. The SLIP-0039 standard is well-tested and supported natively by Trezor devices. However, SSS only protects the backup, not the spending policy. Once shares are combined, the holder has unrestricted access with no time-based protections. The main risks are operational: share holders losing their shares, shares being stored insecurely, or heirs not knowing how to use them. Pairing SSS with a letter of instruction and ideally a multisig spending policy provides stronger protection.

Do I need a lawyer for crypto estate planning?

For significant holdings, yes. A lawyer ensures your digital assets are properly covered under your will or trust, that fiduciary access is explicitly granted, and that the plan complies with your state's laws. However, legal authority without operational access is useless. The lawyer handles the legal side; you still need a technical solution (multisig, Shamir, or a custody service) so your executor or trustee can actually move the funds. For holdings under $50,000, a Shamir backup with a clear letter of instruction may be sufficient without a lawyer.

Can heirs access a hardware wallet without the PIN?

No. If the PIN is lost and no seed phrase backup exists, the funds are inaccessible. Most hardware wallets wipe after a set number of incorrect PIN attempts (e.g., 16 for Trezor). Heirs need either the seed phrase, Shamir shares, or access to a multisig quorum to recover funds. The hardware device itself is not sufficient without the corresponding recovery material.

This tool is for informational purposes only and does not constitute financial, legal, or tax advice. Estate planning laws vary by jurisdiction. Data is approximate and based on publicly available information as of mid-2026. Product pricing, features, and availability change frequently. Consult a qualified estate planning attorney and financial advisor before making inheritance decisions involving digital assets.