What Happens to Your Bitcoin When You Die?

When someone dies, what happens to their Bitcoin (CRYPTO:BTC) stored in a self-custodied wallet? Unlike traditional assets, self-custodied Bitcoin has no beneficiary form, customer service line, or institution to handle the transfer of ownership with a death certificate. This means that Bitcoin inheritance relies entirely on whether the family can access the keys—those secret codes that control the wallet.

If the keys are lost, the coins remain permanently locked on the blockchain. In 2020, blockchain data firm Chainalysis estimated that about 3.7 million BTC appear to be lost, valued at around $315 billion as of October 4, 2026. So what should Bitcoin holders consider to ensure that their assets reach their loved ones when they pass?

Bitcoin Held at a Broker Passes Like Stock, but Self-Custody Does Not

Bitcoin held through a brokerage account, a spot Bitcoin ETF, or a regulated custodian is treated similarly to traditional stocks for inheritance. The executor of the estate—the person responsible for settling the estate—will handle the necessary paperwork with the firm holding the coins.

In contrast, self-custodied Bitcoin functions more like cash hidden in a safe that only one person can open. The key to this safe is a seed phrase, consisting of 12 or 24 common words generated when you set up the wallet. Whoever has this seed phrase can recreate the wallet on a new device and access the coins.

It’s critical to avoid writing the seed phrase directly in a will. Wills often become public records during probate—the legal process of settling an estate. Once the will is public, anyone can read it and access the seed phrase, potentially emptying the wallet before heirs can claim the Bitcoin.

A Letter of Instruction Can Point Heirs to the Keys Without Exposing Them

A smarter way to handle this situation is to keep evidence of the Bitcoin’s existence separate from the keys. The will or trust can refer to the Bitcoin in general terms without including any sensitive information that an outsider could misuse.

A letter of instruction can clarify which wallets exist and where the seed phrases are stored, such as in a safe-deposit box or a locked drawer. This way, the words themselves aren’t written out and remain protected. Including clear steps for opening the wallet is also helpful, especially since many executors may not be familiar with how cryptocurrency works.

Additionally, the executor must know Bitcoin exists in the first place. Unlike traditional investments, self-custodied Bitcoin doesn’t send monthly statements or leave a paper trail. Most estate issues stem from overlooked forms, outdated beneficiary information, or accounts family members didn’t know about, and cryptocurrency adds another layer: tracking down wallets. A free resource like the Die With a Plan guide can provide a comprehensive checklist.

Inherited Bitcoin Can Get a Stepped-Up Cost Basis in the U.S.

From a tax perspective, inherited Bitcoin can actually work in favor of heirs. The IRS considers Bitcoin to be property, and when property is inherited, it usually receives a “stepped-up cost basis.” This means the starting value resets to its fair market value on the date of the owner’s death.

For instance, if someone bought 1 BTC for $10,000 and died when it was worth $85,000, the heir would inherit it at that $85,000 value. If the heir then sells it for $90,000, they would face a taxable gain of only $5,000 instead of $80,000.

Of course, these tax rules can vary by country and state, and larger estates may be subject to estate taxes. Consulting an estate attorney can help families navigate these details.

Will Your Bitcoin Inheritance Reach Your Family?

Bitcoin stored at a broker or in an ETF can be passed down to heirs much like other investments. However, self-custodied Bitcoin can only be inherited if the keys are discoverable. Without access to those keys, the coins remain locked away on the blockchain indefinitely.

Creating a plan is essential, but it also requires regular updates. If a Bitcoin owner transfers coins to a new wallet, opens a brokerage account, or changes devices, they need to ensure the letter of instruction reflects the current information.

If the executor knows about the Bitcoin and keeps the letter up to date, the heirs can claim it with the help of a lawyer. Conversely, if the executor is unaware that the Bitcoin exists, the coins could remain unclaimed forever.

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