Bitcoin Inheritance Solutions Compared

Bitcoin Inheritance: Why Key Transfer Planning Matters

An estimated 3 to 4 million BTC are permanently lost, representing roughly 16-20% of the total mined supply. A significant portion of those losses stem from holders who died without leaving accessible key material to their families. Despite this, only about 4-5% of crypto holders have a formal inheritance plan in place.

Bitcoin inheritance is fundamentally different from traditional asset transfer. Bank accounts and brokerage holdings pass through legal processes: probate courts, executor authority, beneficiary designations. Bitcoin held in self-custody bypasses all of that. If your heirs cannot reconstruct your private keys, the coins are gone. No court order can reverse a lost seed phrase.

The following comparison covers every major approach to Bitcoin inheritance: commercial services, multisig configurations, timelock-based dead man's switches, miniscript policies, legal structures, and hybrid strategies.

Inheritance Solutions at a Glance

Each approach involves a different combination of cost, technical complexity, trust assumptions, and privacy tradeoffs. The table below provides a high-level comparison.

Commercial Inheritance Services

Several companies now offer guided inheritance as part of their custody solutions. These services reduce technical complexity in exchange for recurring fees and some degree of trust in the provider.

Casa

Casa's Standard plan ($250/year) includes a 3-key multisig vault with built-in inheritance. A designated recipient initiates a transfer request, Casa notifies the account holder, and after a six-month verification period, the vault transfers if the holder does not respond. The Premium plan ($2,100/year) upgrades to a 5-key vault with hardware devices included, 1-on-1 onboarding, and 24/7 emergency support. The Private Client tier (custom pricing, US only) adds identity verification at setup and death certificate verification at transfer, removing the six-month waiting period.

Unchained

Unchained uses a 2-of-3 multisig vault where the user holds two keys and Unchained holds one. Vault storage costs $250/year. Their Personal Signature plan ($6,000 first year, $4,500/year renewal) includes concierge onboarding and a complete Inheritance Protocol document package that guides heirs through recovery. Unchained also offers concierge sessions at $750/hour for custom setups.

Nunchuk

Nunchuk's Honey Badger plan ($480/year) takes a different approach: on-chain timelocks enforced by miniscript. A dedicated inheritance key is stored on a Tapsigner card that remains dormant until a chosen activation date. The owner refreshes the timelock indefinitely while alive. When the timelock expires, Nunchuk's platform key is removed on-chain and the signing requirement drops, giving the beneficiary sole control. No KYC is required. The Premier tier ($2,100/year) supports 3-of-5 multisig with two dedicated inheritance keys.

DIY Multisig Inheritance

For holders who want full sovereignty, a self-managed multisig setup distributes keys across multiple locations and people without relying on any company.

A common 2-of-3 configuration distributes three signing devices as follows: Key A stays with the owner (home safe, with a seed backup in a bank deposit box), Key B goes to an attorney or executor (released under defined conditions), and Key C goes to the heir (with written instructions). Any two of the three keys can spend the funds.

A 3-of-5 setup offers greater redundancy: five keys distributed among family members, with no single individual able to act alone. This prioritizes resilience against multiple points of failure at the cost of more coordination overhead.

Hardware costs for a 2-of-3 setup range from $180-$240 (budget devices like Trezor Safe 3 at ~$60 each) to $400-$750 (premium devices like Coldcard Q at ~$250 each). After the initial purchase, ongoing costs are zero. For help sizing a multisig configuration, see the multisig planner tool.

Timelock and Dead Man's Switch Approaches

Bitcoin's scripting language supports native timelocks that can enforce inheritance rules without any third party. Two opcodes enable this:

• OP_CHECKLOCKTIMEVERIFY (CLTV, BIP 65): absolute timelock that prevents spending until a specific block height or timestamp
• OP_CHECKSEQUENCEVERIFY (CSV, BIP 112): relative timelock where the clock starts only after a transaction is confirmed, with a maximum of ~65,535 blocks (~15 months)

For a deeper explanation of these opcodes and their mechanics, see our Bitcoin timelocks guide.

Dead Man's Switch Pattern

The dead man's switch uses CSV-based relative timelocks. The owner creates a recovery wallet and a validly signed but timelocked transaction that sends UTXOs to that wallet. The signed transaction hex and the recovery wallet's seed phrase are given to heirs. The owner periodically moves coins to new UTXOs, which resets the timelock. If the owner stops refreshing (due to death or incapacitation), heirs broadcast the transaction after the timelock expires.

This approach is fully trustless and requires no third-party service. The tradeoffs: each time coins move, new pre-signed transactions must be created. Fee estimation for future transactions is uncertain. The entire UTXO must be spent (no partial spending with change).

Miniscript Inheritance Policies

Miniscript (BIP 379) enables composing complex spending conditions that are formally verifiable. An inheritance policy might look like: or(pk(owner_key), and(pk(heir_key), older(26000))), which means the owner can always spend, or the heir can spend after approximately six months.

Liana Wallet (by Wizardsardine) is the primary user-friendly implementation. It supports Taproot descriptors and hardware wallets like BitBox02. The software is free and open source. Nunchuk's inheritance feature also uses miniscript under the hood.

The key advantage: spending conditions are enforced on-chain by the Bitcoin network itself. No trusted third party is needed at the protocol level.

Shamir's Secret Sharing

Shamir's Secret Sharing splits a seed phrase into N shares with a K-of-N threshold. Any K shares reconstruct the full secret; fewer than K reveal nothing. A 3-of-5 split distributes five shares to different people or locations, and any three can recover the wallet.

Trezor hardware wallets support SLIP-39 (Shamir Backup) natively during device initialization. This makes it straightforward to create shares at setup time.

Important distinction: Shamir splits one secret into shares. When reassembled, the full secret exists in one place, creating a single point of failure at the moment of recovery. Multisig keeps keys separate at all times and never combines them. For high-value holdings, multisig is generally preferred over Shamir for this reason.

Legal Structures for Bitcoin Inheritance

Technical solutions handle the "how do heirs access the keys" problem. Legal structures handle the "who gets what" problem and provide a framework recognized by courts. Most comprehensive plans combine both.

Revocable Living Trust

A revocable living trust avoids probate, enabling faster and private asset transfers. The grantor retains control during their lifetime and can modify or revoke the trust at any time. Attorney costs range from $1,000-$4,000 for a basic trust to $4,000-$10,000+ in high-cost states. Ongoing trustee fees typically run 0.5-1.5% of trust assets annually.

LLC Structure

Holding Bitcoin in an LLC allows transferring membership interests to heirs instead of transferring Bitcoin on-chain, avoiding taxable events. Wyoming is the preferred state for crypto LLCs due to crypto-friendly legislation and no state income tax. Formation costs are approximately $300-$400 for the first year (filing fee, annual report, registered agent), plus $500-$2,000 for legal drafting of an operating agreement with crypto-specific provisions.

Why a Will Alone Is Insufficient

Wills go through probate, a public process that can take months to years. Crypto values can fluctuate dramatically during that delay. Private key information included in a will becomes part of the public record, creating a security risk. Most estate planning attorneys recommend using a will only as a backstop alongside a trust or technical solution, never as the primary mechanism.

Commercial Services: Detailed Comparison

Choosing the Right Approach

The right inheritance solution depends on the value of holdings, technical comfort level, and trust assumptions you are willing to make.

For holdings under $50,000: a Shamir backup (3-of-5) with clear written instructions for heirs is often sufficient. Store shares in geographically separated locations. Cost: one hardware wallet ($60-$170).

For holdings of $50,000-$500,000: a commercial service like Casa Standard ($250/year) or Nunchuk Honey Badger ($480/year) provides guided inheritance without requiring deep technical knowledge. Pair with a basic revocable trust ($1,000-$4,000) for legal clarity.

For holdings over $500,000: combine a robust technical solution (3-of-5 multisig or miniscript timelocks) with proper legal structures (revocable trust or LLC). Consider Casa Premium or Unchained Signature for concierge support. Engage an estate planning attorney familiar with digital assets.

For maximum sovereignty: Liana Wallet provides free, open-source, on-chain timelock enforcement with zero ongoing costs and no third-party dependency. The tradeoff is higher technical complexity during setup.

Regardless of approach, the inheritance plan should also cover assets held on layer 2 protocols. If you hold Bitcoin on Spark or the Lightning Network, ensure your heirs have instructions for accessing those balances as well, since L2 state may not be recoverable from an on-chain seed alone.

Frequently Asked Questions

What happens to Bitcoin when the owner dies?

If the owner held Bitcoin in self-custody and left no accessible key material, the coins are permanently inaccessible. No court, government, or company can recover them. If the owner used an exchange or custodian, heirs can go through that company's account recovery process, which typically requires a death certificate, probate documentation, and proof of beneficiary status.

How do I set up a Bitcoin dead man's switch?

The simplest approach is Liana Wallet or Nunchuk's inheritance feature, both of which use miniscript to create on-chain timelocks. You configure a recovery key that becomes active after a set period of inactivity (typically 3-12 months). While you are alive, you periodically refresh the timelock by moving your coins. If you stop refreshing, your heir's recovery key automatically becomes valid for spending.

Is multisig or Shamir's Secret Sharing better for inheritance?

Multisig is generally preferred for inheritance because keys remain separate at all times. Shamir shares must be combined to reconstruct a single secret, creating a brief window where the full key exists in one place. For a detailed comparison of multisig configurations, see our multisig setup comparison.

How much does Bitcoin inheritance planning cost?

Costs range from $0 (Liana Wallet, DIY timelocks) to several thousand dollars per year (Casa Premium at $2,100/year, Unchained Signature at $4,500-$6,000/year). A practical middle ground: Casa Standard ($250/year) or Nunchuk Honey Badger ($480/year) combined with a basic revocable trust ($1,000-$4,000 one-time attorney fee). Total first-year cost for this combination: roughly $1,250-$4,500.

Can I use a will to pass on Bitcoin?

A will alone is generally insufficient for Bitcoin inheritance. Wills go through probate (public, slow, and potentially months to years long), and any key information included becomes part of the public record. A will works best as a legal backstop that designates who receives the Bitcoin, while a separate technical mechanism (multisig, timelocks, or a commercial service) handles the actual key transfer.

Do I need a lawyer for Bitcoin inheritance planning?

For holdings above $100,000, consulting an estate planning attorney familiar with digital assets is strongly recommended. They can draft a trust that properly accounts for crypto-specific issues: key management authority, the distinction between custody and ownership, tax basis documentation, and compliance with the prudent investor rule. For smaller holdings, a commercial service with built-in inheritance (Casa, Nunchuk) may be sufficient without legal counsel.

What is the best free Bitcoin inheritance solution?

Liana Wallet is the leading free and open-source option. It uses miniscript to enforce timelock-based recovery rules on-chain, with no recurring fees and no third-party dependency. The tradeoff is that setup requires technical comfort with HD wallets, PSBTs, and hardware signing devices. For a non-technical user, a paid service with guided onboarding is a safer choice.

This tool is for informational purposes only and does not constitute financial or legal advice. Pricing is approximate and based on publicly available information as of early 2026. Service features, costs, and availability change frequently. Always verify current details with service providers and consult a qualified attorney for estate planning decisions.