Estate tax is the focus of this guide. Inherited crypto that no one can access raises a hard question: can an estate be taxed on it? The IRS material cited here doesn’t address lost keys specifically. Below I give the sources I could confirm, including how estates are valued and the one IRS memo on worthless crypto, and label the rest as my reasoning. The practical takeaway is encouraging: the steps that help most happen before and soon after death.
Estate tax: What the Gross Estate Includes
The IRS describes the gross estate as an accounting of everything you own or have certain interests in at the date of death, valued at fair market value, which it defines as the price at which property would change hands between a willing buyer and a willing seller, not a forced-sale price.
A Form 706 is required for 2026 deaths if the gross estate plus adjusted taxable gifts and the specific gift tax exemption exceeds $15,000,000, and the return is due nine months after death, with an automatic six-month extension available by filing Form 4768. The extension is for filing, not paying (IRS: Frequently asked questions on estate taxes). The page doesn’t discuss crypto or lost access.
The Alternate Valuation Date
Under 26 U.S.C. § 2032, an executor may elect to value the estate six months after death instead of at the date of death. Property distributed or sold within those six months is valued on the date it was disposed of.
The election is allowed only if it lowers both the gross estate and the combined estate and generation-skipping transfer tax, it is made on the estate tax return, and it cannot be revoked (Cornell LII). SmartAsset adds that it generally matters only for estates above the 2026 federal exemption of $15 million per individual.
The same source notes a trade-off: a lower value also lowers the cost basis heirs inherit, which can raise their capital gains if they sell later (SmartAsset).
Inherited Crypto Access: An Example With Assumed Numbers
Assume an estate worth $20,000,000 at death that falls to $18,000,000 six months later, with a $15,000,000 exemption. SmartAsset describes the federal estate tax rate as a flat 40% above the exemption, so I use that. Tax on the date-of-death value is ($20,000,000 − $15,000,000) × 40% = $2,000,000. Tax on the alternate value is ($18,000,000 − $15,000,000) × 40% = $1,200,000. The difference is $800,000.
The trade-off is that heirs’ basis drops by $2,000,000. If they later sold and paid an assumed 20% on that extra gain, it would add $400,000 of tax, so the net effect in this simple illustration is $800,000 − $400,000 = $400,000. This ignores deductions and every other factor.
| Item (assumed) | Date of death | Alternate date |
|---|---|---|
| Estate value | $20,000,000 | $18,000,000 |
| Estate tax at 40% over $15M | $2,000,000 | $1,200,000 |
Is Lost Crypto “Worthless”? What the IRS Said
In Chief Counsel Advice 202302011, the IRS looked at a taxpayer who bought crypto units at $1.00 each in 2022 that were worth less than one cent by year-end but still traded on an exchange.
The IRS concluded there was no deductible loss: the units still had value above zero and could be sold, exchanged or transferred, they were not abandoned, and a decline in value alone is not a loss, which needs a closed transaction or an identifiable event under Treas. Reg. § 1.165-1 (IRS). That memo concerned a token that could still be traded, and it does not address lost keys.
My Reasoning, Not a Rule
This section is my own reasoning. In my view, the safer assumption is that a valuation looks at what an asset is worth, not who can reach it, since the IRS definition above speaks of what a willing buyer would pay. I can’t confirm that from a source for lost keys.
How to Get Started With Inherited Crypto Access
- Keep records of the wallet address and purchase history. That is my suggestion, since any later position would depend on them.
- Write down how access was lost and when. My suggestion, because a record made at the time is easier to rely on.
- Ask an estate attorney about the alternate valuation election if prices fell after death, and about the basis trade-off described above.
- Calendar the deadlines. Nine months for Form 706, with a six-month filing extension available, and the extension doesn’t extend payment (IRS).
- Plan ahead. I’d keep an access plan for your own crypto so your heirs aren’t in this position. That is my view.
Inherited Crypto Access: Questions Answered
Does the alternate valuation date help? Only if it lowers both the gross estate and the estate tax, according to the source above, and for estates above the exemption.
Can lost crypto be deducted as worthless? The IRS memo above says a token that can still be sold is not worthless. I found nothing on lost keys.
Do most estates owe federal estate tax? The IRS page sets the 2026 Form 706 threshold at $15,000,000.
My Take on Inherited Crypto Access
- In my view, the most valuable step is an access plan made while the owner is alive, because it removes the question entirely.
- In my suggestion, if you are an executor facing this, document everything and ask the attorney about valuation before the deadline.
Sources
- IRS: Frequently asked questions on estate taxes
- SmartAsset: Alternate valuation date
- IRS: Chief Counsel Advice 202302011
- Cornell LII: 26 U.S.C. § 2032
This article offers general information and my own opinions, not financial, tax, or legal advice. The figures in worked examples are assumed. Laws, tax rules, and products change and can differ by location, so check current official sources and talk to a qualified professional about your own situation.
Related reading: Inherited Crypto Cost Basis: Date-of-Death Value Explained and How to Leave Crypto to Your Kids Without Losing It.