When a person who held cryptocurrency dies, the assets do not value themselves. A fiduciary has to find them, secure the keys, fix a fair market value as of the date of death, and account for it on the estate's return. The work is harder than it sounds, because a volatile, thinly traded token has no single price waiting to be read.
Estate planning for digital assets is one set of problems; estate administration is another. Our earlier pieces on self-custodied crypto and on holding digital assets in trust addressed the planning side — how an owner arranges custody and succession before death so that what they hold can be reached and passed on. This article picks up after death, where the executor or administrator inherits the consequences of whatever planning was or was not done, and has to identify, secure, value, and account for cryptocurrency under rules written largely for stocks, bonds, and bank accounts.
The fiduciary's task divides into a handful of distinct duties. The first is custody: locating the assets and bringing the private keys under the estate's control before they are lost or taken. The second is valuation: arriving at a defensible date-of-death fair market value for assets that may trade on several venues at once, or barely trade at all. The third is tax: the federal estate tax, the separate New York estate tax, the stepped-up basis the heirs receive, and the income tax that follows if the fiduciary sells during administration. Running underneath all of it is price risk, because the value can move sharply between the day of death and the day of distribution.
It is general information, not legal or tax advice. How a particular estate must value its holdings, what it owes, and what its heirs receive depend on the specific assets, the facts of the death, and the law in force, and those questions belong to counsel and a tax adviser working from the actual records. The discussion that follows describes the shape of the problem from a New York perspective; it does not set out current figures, thresholds, or rates, because those change and any number stated here would soon be wrong.
The fiduciary's first duty is to find and secure the assets
Before an executor can value cryptocurrency, the executor has to locate it, and that is not a given. A traditional estate leaves a paper trail — statements, checkbooks, deeds — but self-custodied crypto may exist only as keys held on a device, written on paper, or split across hardware the family did not know to look for. The fiduciary's duty to marshal the estate's assets includes a duty to investigate diligently: to review the decedent's records and devices, to follow evidence of exchange accounts and wallets, and to do so without delay, because keys that are lost are not recoverable and assets left exposed can be moved by someone else.
Securing what is found is a duty in its own right. A private key is the asset, in the practical sense that whoever controls the key controls the coins, and a fiduciary who leaves keys where others can reach them has not safeguarded the estate. The careful course is to bring the keys under the estate's exclusive control promptly — moving assets to custody the fiduciary alone holds, documenting every step, and treating the access credentials with the same care a fiduciary would give cash or bearer instruments. Assets held at a custodial exchange present a different problem: the fiduciary has to satisfy the exchange's process for establishing authority before the platform will release anything, which takes documentation and time.
All of this has to be recorded as it happens. A fiduciary accounts to the beneficiaries and, where required, to the Surrogate's Court, and the account has to show what was found, when it was secured, and what it was worth. Cryptocurrency makes contemporaneous recordkeeping essential rather than optional, because the assets move on a public ledger that does not forget, and a fiduciary who cannot explain a transfer invites a beneficiary to ask why it was made. The discipline that protects the estate is the same discipline that protects the fiduciary: find it, secure it, and write down what was done at the moment it was done.
Date of death value, and why a volatile token resists it
Estate tax is assessed on the fair market value of the assets as of the date of death, and that single phrase carries most of the difficulty. For a publicly traded stock, the date of death value is close to mechanical: the markets quote a price, and a settled convention reads it. Cryptocurrency offers no such comfort. A given token may trade on many venues at once, at prices that differ across them at the same instant, around the clock, with no closing bell that fixes an official figure. The fiduciary has to construct a fair market value rather than look one up, and has to be able to defend the method used.
The harder the asset is to value, the more the method matters. A widely traded coin with deep markets can be valued by a consistent, documented approach — a defined source or set of sources, read at a defined point — applied the same way for every holding and recorded in full. Thinly traded or illiquid tokens are the real problem. A token with little volume, a quote on only one or two venues, or no active market at all has no price that a thin market can be trusted to report, and a single large position may not be salable at the quoted figure without moving the market against the seller. The number a fiduciary chooses for such an asset is a judgment, and it has to be a defensible one.
Where the asset is significant, illiquid, or hard to price, a qualified appraisal is the prudent course. An appraisal by a qualified, independent professional, prepared on a sound and stated methodology, gives the estate a supportable basis for the value it reports and a record to stand behind if the figure is later questioned. It is not a formality; it is the difference between a number the fiduciary can explain and a number the fiduciary merely asserted. The cost of an appraisal is small against the exposure a fiduciary takes on by reporting a value that cannot be supported.
A fiduciary has to construct a fair market value for crypto rather than look one up — and for a thinly traded token, the number chosen is a judgment that has to be defensible.
Stepped-up basis and what the heirs actually receive
The date of death value does more than fix the estate tax. Under the general rule for inherited property, an asset takes a new income tax basis equal to its fair market value at death — the stepped-up basis — and that rule applies to cryptocurrency as it applies to other property an estate holds. The practical meaning is large. An heir who receives a coin the decedent bought years earlier does not inherit the decedent's original cost; the heir's basis resets to the value at death, so the appreciation that accrued during the decedent's life is not carried forward to be taxed in the heir's hands when the heir later sells.
This is precisely why the date of death valuation matters to the beneficiaries and not only to the taxing authorities. A well-supported value at death becomes the heir's basis going forward, and a low or poorly documented value can hand an heir a larger taxable gain later, when the heir sells and measures the proceeds against that basis. The same appraisal that supports the estate's reported value supports the heir's basis, which is one more reason to get the valuation right and to keep the records that prove it. The figure travels with the asset into the next generation.
The step-up is a general rule with conditions and exceptions, and it should not be treated as automatic for every asset in every estate. How basis is determined for a particular holding — and whether any special rule applies to it — depends on the facts and on the tax law in force, which is a question for a tax adviser working from the actual records rather than a point to assume from a general description. What the fiduciary can take from this is the connection: the value fixed for estate purposes is, as a rule, the value the heir starts from, so the valuation work serves two masters at once.
The value fixed at death is, as a general rule, the basis the heir starts from — so a poorly supported date-of-death figure can become a larger taxable gain a generation later.
The federal estate tax and the separate New York estate tax
Cryptocurrency is property in the estate, and as property it counts toward the estate's value for transfer-tax purposes. There is a federal estate tax, assessed on the value of what the decedent owned at death above an exemption amount, and the digital assets the estate holds are included in that computation at their date of death fair market value alongside everything else. The crypto estate tax question, in other words, is not a separate regime; it is the ordinary estate tax applied to an asset class that happens to be difficult to value, which is why the valuation work in the preceding sections is the foundation for everything here.
New York imposes its own estate tax, separate from the federal one, and an estate can owe New York estate tax whether or not it owes anything to the federal government. The two systems use different exemption levels and operate independently, so a fiduciary cannot reason from the federal result to the state one. New York's tax also contains a feature that rewards attention: a so-called cliff, under which an estate that exceeds the state exemption by more than a defined margin can lose the benefit of the exemption and be taxed on a much larger share of its value than an estate just under the line. The existence of that cliff is a planning and administration fact worth knowing, even though its precise terms are not stated here.
Figures, thresholds, and rates are deliberately left out of this article, because they change and any number printed today would mislead a reader tomorrow. The federal exemption moves, the New York exemption moves, and the margins that define the New York cliff are set by law that is periodically revised. A fiduciary should determine the applicable numbers for the year of the death with counsel and a tax adviser, rather than relying on figures remembered from a prior matter or read in a general piece. The point to carry forward is structural: two estate taxes can apply, they apply independently, and crypto is counted in both at its date of death value.
Selling during administration, price risk, and the duty to manage it
An estate is rarely settled in a day, and during the months an administration takes, the cryptocurrency keeps moving in price. That interval creates a problem the fiduciary cannot ignore. Holdings valued at one figure on the date of death may be worth a great deal more or less by the time the estate is ready to distribute, and the fiduciary owes the beneficiaries a duty of prudence in deciding whether to hold a volatile asset, sell it, or convert it. There is no single correct answer, but there is a wrong posture: ignoring the question. A fiduciary who lets a concentrated, volatile position ride without a considered reason has not exercised the care the role demands.
Selling has its own tax consequences. When a fiduciary sells an asset during administration, the estate generally recognizes gain or loss measured against the basis the asset took at death — the same stepped-up basis the heirs would otherwise receive. Because that basis is the date of death value, a sale soon after death often produces little gain, while a sale after a sharp rise can produce a taxable gain to the estate that the fiduciary has to report and account for. Conversely, a decline can produce a loss. The decision to sell is therefore both a prudence question and a tax question, and the two should be considered together rather than in sequence.
Managing this well comes back to documentation and counsel. A fiduciary who decides to sell, to hold, or to convert should record the reasoning, take advice where the stakes warrant it, and keep the transaction records the estate will need for its income tax filing and its account to the beneficiaries. The recurring lesson of crypto in estate administration is that the public ledger preserves everything and excuses nothing: the fiduciary who documents each decision as it is made, values each asset on a method that can be defended, and reasons about price risk deliberately is the fiduciary who can answer for the estate when asked. That is the whole of the duty, applied to an asset the old rules did not anticipate.
The public ledger preserves everything and excuses nothing — the fiduciary who documents each decision as it is made is the one who can answer for the estate.