Self-custody has one built-in tragedy: bitcoin secured so well that your own family cannot reach it. Billions of dollars are already stranded in wallets whose owners died without a plan. This guide is about making sure your bitcoin outlives you — without weakening its security while you are alive.
We are not attorneys, and this is not legal advice. Estate law varies by state; use this guide to prepare for a conversation with an estate planning attorney, not to replace one.
The core problem
Everything that makes bitcoin hard to steal makes it hard to inherit. A bank account has a legal recovery path; a seed phrase has none. Your plan has to bridge two worlds: the legal one (wills, trusts, probate) and the cryptographic one (keys, passphrases, devices). Most people plan one and forget the other.
What your heirs will actually need
- Knowledge that the bitcoin exists — an astonishing number of estates never find out
- Access to the seed phrase (and passphrase, if any)
- Instructions simple enough for a stressed non-expert to follow, or the name of a person they can trust to help
- Legal authority to inherit it — the will or trust side
The letter-and-location pattern
The simplest robust setup we know: a sealed letter for your executor or heirs that explains what exists and who can help — but contains no secrets — plus your seed backup stored securely as usual. The letter says, in effect: “I own bitcoin. It is stored on a hardware wallet. The backup is in [location or custody arrangement]. Contact [trusted person / attorney] for help. Do not type the recovery words into any website or share them with anyone who contacts you offering help.” That last sentence will one day save your family from the scavengers who prey on the recently bereaved.
What never goes in the will
A will becomes a public document in probate. Seed phrases, passphrases, and PINs must never appear in it — the will conveys ownership, a separate private channel conveys access. Your attorney has handled this split before; it is the same pattern as safe combinations.
Passphrases and multisig: handle with care
A passphrase-protected wallet where the passphrase exists only in your head dies with you. If you use one, its inheritance path needs explicit design — typically the passphrase stored with an attorney or in a separate sealed arrangement from the seed. Multisig can genuinely shine for inheritance (a 2-of-3 where an heir and an attorney together can recover), but only with professional setup and documentation. Collaborative custody services built on multisig — Unchained, Casa, and similar — exist for exactly this and are worth their fees for larger holdings.
Test the plan while you are alive
A recovery drill is the only proof a plan works: could your spouse or executor, using only what they would actually have, get to the coins? Walk through it together once. Every stranded-bitcoin story is a plan that was never tested.
Review triggers
Revisit the plan on: marriage, divorce, births, deaths, moves, meaningful changes in holdings, or any change to your wallet setup. Our printable estate planning checklist turns this into a one-page annual ritual.