How to Report Bitcoin on IRS Form 706: The Complete Estate Tax Return Guide

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Does the Estate Need to File Form 706?

Form 706 — the United States Estate (and Generation-Skipping Transfer) Tax Return — is required for every decedent whose gross estate plus adjusted taxable gifts exceeds the applicable exclusion amount for the year of death. For estates of decedents dying in 2026, the federal estate tax exemption is approximately $15 million per person, indexed for inflation from the Tax Cuts and Jobs Act baseline.

This means that most Bitcoin estates will not owe federal estate tax. But the filing question is more nuanced than it appears — and the answer is almost never "don't file."

The Gross Estate Includes All Bitcoin at Fair Market Value

When calculating whether a Form 706 filing is required, the executor must include in the gross estate all Bitcoin owned or controlled by the decedent at death — including Bitcoin held in self-custody hardware wallets, exchange accounts, multi-signature arrangements where the decedent held a controlling key, and Bitcoin held in the decedent's name inside certain trust structures. Bitcoin held in irrevocable trusts properly structured to remove the asset from the estate is generally excluded, but this depends heavily on the specific trust terms and the decedent's retained interests. For a full picture of how Bitcoin is structured inside estate plans, see our Bitcoin estate planning guide.

The gross estate includes all Bitcoin regardless of whether the heirs can currently access it. A decedent whose private keys are unknown to the family still has those Bitcoin included in the gross estate at fair market value — though there are arguments for reduced valuation when access is genuinely impossible, which we address in Section 6.

Why File Form 706 Even Below the Threshold?

The most important reason to file Form 706 even when no estate tax is owed: making the portability election. Under current law, a surviving spouse can claim the deceased spouse's unused exemption (DSUE) — but only if the estate files Form 706 and makes a timely portability election. Without the election, the unused exemption is permanently lost.

For a Bitcoin-heavy estate where the decedent has significant unused exemption, failing to file Form 706 and elect portability can cost the surviving spouse millions of dollars in additional estate tax exposure — particularly if Bitcoin appreciates substantially before the survivor's death. The portability election is available regardless of the estate's gross value; even a $500,000 estate can and often should file to preserve portability.

State estate tax filing requirements may also apply. Approximately 12 states and the District of Columbia impose state estate taxes, often with significantly lower exemptions — some as low as $1 million. States with their own estate tax may require a state estate tax return even for estates that don't trigger federal filing requirements. Executors must evaluate both federal and state obligations independently.

Use our Bitcoin estate tax calculator to estimate total federal and state estate tax exposure for a Bitcoin-heavy estate.

Filing Deadlines

Form 706 is due nine months from the date of death, with an automatic six-month extension available by filing Form 4768 before the nine-month deadline. The extension extends the time to file, not the time to pay — any estate tax owed is still due within nine months. For the portability election, the estate must file Form 706 within the normal filing period (including extensions).

How the IRS Treats Bitcoin for Estate Tax Purposes

The IRS treats Bitcoin as property, not currency. This foundational classification — established in IRS Notice 2014-21 and consistently maintained in subsequent guidance — has profound implications for estate tax reporting.

IRS Notice 2014-21: The Foundation

Notice 2014-21, issued in March 2014, established that virtual currency is treated as property for U.S. federal tax purposes. This means general tax principles applicable to property transactions apply to cryptocurrency transactions. For estate tax purposes, the consequence is straightforward: Bitcoin is a property asset that must be reported at its fair market value on the date of death, just like stocks, bonds, real estate, and other property held in the gross estate.

The Notice confirmed that general federal tax principles — not any currency-specific rules — govern virtual currency. Bitcoin is not treated as foreign currency. It is not subject to foreign currency reporting rules under Section 988. It is simply property, with all the estate tax consequences that follow from that classification.

Revenue Ruling 2023-14: Crypto Income Is Taxable When Received

Revenue Ruling 2023-14 addressed the income tax treatment of staking rewards, confirming that cryptocurrency received as staking rewards constitutes gross income at the time of receipt, measured at fair market value. While this ruling addresses income tax rather than estate tax, it has implications for estate administrations that include staking wallets or validators — staking rewards accruing after death may constitute income in respect of a decedent (IRD) rather than receiving a step-up in basis. We address this complication in Section 6.

Fair Market Value Standard

For estate tax purposes, fair market value is defined as the price at which the property would change hands between a willing buyer and a willing seller, neither being under any compulsion to buy or sell, and both having reasonable knowledge of relevant facts. Applied to Bitcoin, this means the price a hypothetical market participant would pay on the open market on the date of death — not the price the estate actually receives when selling the Bitcoin months later.

This standard matters enormously for large Bitcoin positions. A holder of several thousand Bitcoin cannot realistically sell that entire position in a single transaction at the spot price without causing significant market impact. Some practitioners argue for a liquidity or blockage discount to fair market value for very large positions, similar to the discounts applied to concentrated stock positions. The IRS has not formally addressed blockage discounts for cryptocurrency, and this remains a contested area. Estates with very large Bitcoin holdings should work with a qualified appraiser to document the valuation methodology.

Valuing Bitcoin for Form 706: The Critical Date-of-Death FMV Rules

Getting the Bitcoin valuation right is the most technically demanding part of a Form 706 with cryptocurrency assets. A poorly documented valuation is an invitation for IRS scrutiny — and a potentially expensive one.

The Daily Average Method

The standard approach for valuing publicly traded cryptocurrency on the date of death is the daily average of the high and low trading prices on a reputable exchange. This mirrors the methodology used for publicly traded stocks under Treasury Regulation § 20.2031-2(b), which averages the high and low quoted selling prices on the valuation date.

For Bitcoin specifically, the executor should:

1. Identify the date of death (not the date the death certificate was issued)
2. Obtain the published daily high and low trading price for Bitcoin on that date from a major exchange
3. Calculate the average: (High + Low) ÷ 2
4. Multiply by the quantity of Bitcoin held at time of death
5. Document the source, including screenshots with timestamps and any downloaded price history in CSV format

If the decedent dies on a weekend or holiday when the market was open (Bitcoin trades 24/7), the valuation date is still the date of death. Bitcoin does not have market holidays — this actually simplifies the valuation compared to stocks, where weekend deaths require interpolation between Friday and Monday prices.

Which Exchange to Use

There is no IRS-mandated exchange for cryptocurrency valuations. The standard is that the exchange must be reputable, have sufficient liquidity, and provide transparent price data. Common choices include Coinbase, Kraken, and Gemini, all of which publish historical daily price data accessible to the public. CoinMarketCap and CoinGecko aggregate prices across multiple exchanges and can serve as a reference, though some practitioners prefer to use a single major exchange for consistency.

The executor should use the same exchange or data source consistently across all Bitcoin positions in the estate and document the choice in the estate's records. Using the exchange where the decedent actually held Bitcoin (if exchange-held) is a defensible and practical choice.

The Alternate Valuation Date

Under IRC Section 2032, the executor may elect to value the gross estate at the alternate valuation date — six months after the date of death, or the date of distribution or disposition if earlier — if using the alternate date would both reduce the gross estate value and reduce the estate tax liability. The alternate valuation date election is all-or-nothing: the executor cannot elect it for Bitcoin while using the date-of-death value for other assets.

If Bitcoin declined significantly in the six months following the decedent's death, the alternate valuation date election could substantially reduce estate tax liability for taxable estates. However, it also reduces the step-up in basis for income tax purposes — a tradeoff that requires careful analysis. If no estate tax is owed anyway (because the gross estate is below the exemption), the alternate valuation date election is generally not available.

Documentation Requirements

Qualified Appraisals for Large Holdings

For Bitcoin holdings that represent a large portion of the gross estate — generally any position that, if mis-valued, would affect the estate tax by more than a modest amount — retaining a qualified appraiser is strongly recommended. A qualified appraisal provides a defensible, documented valuation methodology that substantially reduces IRS audit risk and, if an audit occurs, demonstrates the estate's good-faith compliance effort.

A qualified appraiser for Bitcoin must meet the IRS standards under Treasury Regulations § 1.170A-17: they must be certified or licensed by a recognized professional organization, must have demonstrated verifiable education and experience in valuing digital assets, must be independent from the estate, and must sign and date the appraisal. The appraisal must be conducted no earlier than 60 days before the date of death and no later than the due date of Form 706 (including extensions).

Where Bitcoin Goes on Form 706

Bitcoin is reported on Schedule B — Stocks, Bonds and Other Intangible Personal Property Not Requiring Real Estate Appraisal. Despite its name, Schedule B is the catch-all schedule for intangible personal property that can be valued without a real estate appraisal — and cryptocurrency squarely fits this category.

Description Format

Column A of Schedule B requires a description of each asset. For Bitcoin, the description should include:

• The asset name and ticker symbol: "Bitcoin (BTC)"
• The quantity held in decimal form: "2.50000000 BTC"
• The custody location: "Coinbase account, account ending in XXXX" or "Hardware wallet — Ledger Nano X, self-custody"
• The wallet address or account identifier if listing multiple wallets separately
• The date-of-death unit value: "$90,000 per BTC"

An example entry might read: "Bitcoin (BTC) — 2.50000000 BTC held at Coinbase (account ending 4821); date-of-death FMV $90,000 per BTC; total $225,000."

How to List Multiple Wallets and Exchange Accounts

Each separately identifiable custody location should be listed as a separate line item on Schedule B. If the decedent held Bitcoin across three hardware wallets and two exchange accounts, each should appear as its own entry with its own balance. This granularity:

• Makes it clear to the IRS that the estate has identified and inventoried all Bitcoin positions
• Creates a clear record for the executor's duty to account to beneficiaries
• Prevents the IRS from arguing that additional undisclosed positions exist
• Simplifies future income tax reporting as positions are distributed or liquidated

If the decedent held multiple denominations on the same exchange (e.g., Bitcoin, Ethereum, and Litecoin), each cryptocurrency should appear as its own line item. Ethereum, Litecoin, and other cryptocurrencies are also reported on Schedule B using the same methodology.

Self-Custody vs. Exchange-Held Bitcoin

Exchange-held Bitcoin — Bitcoin held in a custodial account on Coinbase, Kraken, Gemini, or another platform — is relatively straightforward to document. The exchange will typically provide a statement of assets as of the date of death upon request by the executor with appropriate documentation (death certificate, letters testamentary).

Self-custody Bitcoin presents greater documentation challenges. The executor must independently verify the balance of each wallet address as of the date of death using a blockchain explorer (Mempool.space, Blockstream.info, or similar). The block height closest in time to the moment of death should be noted. If the exact time of death is uncertain, the executor should document the range of possible balances and the methodology used.

For estates with significant self-custody Bitcoin, working with a Bitcoin-specialized estate attorney or forensic accountant is advisable. Our guide to what happens to Bitcoin after death covers the practical process of locating and documenting self-custody positions in detail.

Bitcoin Reporting Across Tax Forms: Form 706 vs Form 709 vs Form 1040

Bitcoin may appear on multiple IRS forms depending on the transaction and taxpayer involved. Understanding which form governs which event is essential for avoiding double-counting, missed filing obligations, and cross-form inconsistencies that trigger IRS scrutiny.

Note that a single Bitcoin inheritance triggers obligations across all three forms: Form 706 for the estate, Form 1040 for the decedent's final year (and Form 1041 for the estate's ongoing income), and potentially Form 709 if the decedent made reportable gifts in prior years. For a comprehensive look at how Form 1099-DA interacts with estate administration, see our guide on Bitcoin Form 1099-DA and estate planning.

The Step-Up in Basis: The Biggest Estate Tax Benefit

For most Bitcoin estates — particularly those below the estate tax exemption threshold — the most significant tax benefit at death is not an estate tax issue at all. It is the step-up in cost basis under IRC Section 1014.

How the Step-Up Works for Bitcoin

Under Section 1014, property acquired from a decedent receives a new cost basis equal to its fair market value on the date of death. For Bitcoin, this means the embedded capital gain that accrued during the decedent's lifetime is permanently eliminated — not deferred, but eliminated.

Consider a Bitcoin holder who purchased 10 BTC in 2015 for $300 per coin, giving them a total cost basis of $3,000. By 2026, those 10 BTC are worth $900,000. If the holder sells during life, they recognize a $897,000 capital gain, triggering approximately $134,550 in federal capital gains tax at the 15% long-term rate (potentially more at higher income levels). If instead the holder dies and leaves the Bitcoin to their heirs, the heirs receive a stepped-up basis of $900,000. They can sell immediately and owe zero capital gains tax on any appreciation that accrued during the decedent's lifetime.

This is not a loophole. It is a deliberate feature of the estate tax system, designed to prevent double taxation of the same appreciation through both estate tax and capital gains tax. For estates that owe estate tax, the step-up offsets part of the estate tax burden. For estates below the exemption — the vast majority of Bitcoin estates — the step-up is a pure benefit with no offsetting cost.

For a deeper analysis of how to structure holdings to maximize the step-up benefit, see our dedicated guide on Bitcoin step-up in basis at death.

Planning Implications: The Buy-and-Hold Advantage

The step-up in basis creates a powerful incentive to hold appreciated Bitcoin rather than selling it during life. Every dollar of appreciation that occurs before death and is passed to heirs avoids capital gains tax entirely — a benefit that compounds with the size of the position and the degree of appreciation.

For Bitcoin holders with very large, very low-basis positions, this creates a strategic tension: realizing gains during life generates immediate tax liability, while holding for the step-up eliminates that liability but concentrates the tax burden in the estate at death (if the estate is taxable). The optimal strategy depends on the individual's net worth, expected Bitcoin appreciation, estate tax exposure, and planning horizon.

Partial Step-Up: Joint Tenancy and Community Property

The step-up rules are more complex when Bitcoin is held jointly. Property held in community property states receives a full step-up on both halves — both the decedent's share and the surviving spouse's share receive a new basis at death. This is a substantial benefit unique to community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin).

Property held in joint tenancy with right of survivorship (JTWROS) — common for exchange accounts titled in both spouses' names — receives only a partial step-up. The decedent's fractional interest (typically 50%) receives a step-up, while the surviving joint tenant's pre-existing basis is unaffected. This is significantly less favorable than community property treatment and is one reason estate planners often recommend converting JTWROS holdings to community property characterization where possible.

Bitcoin-Specific Complications on Form 706

Bitcoin creates a category of complications that have no direct analog in traditional estate administration. These are not hypothetical edge cases — they arise regularly in Bitcoin estates, and the IRS guidance that applies is thin, evolving, or nonexistent.

Lost or Inaccessible Bitcoin

Perhaps the most common complication: Bitcoin that the estate cannot access because the private keys or seed phrases are lost, destroyed, or unknown. The question of whether lost Bitcoin must be included in the gross estate at full fair market value, reduced value, or zero value is legally unsettled.

The general rule is that an asset must be included in the gross estate if the decedent owned it at death, even if the estate cannot locate or access it. This suggests that lost Bitcoin — Bitcoin that exists on the blockchain in an address associated with the decedent but for which the private key cannot be found — is technically includable at full fair market value. Some practitioners take a more aggressive position: that Bitcoin for which access is provably impossible is effectively worthless (like a stock certificate that was destroyed and cannot be reissued), supporting a zero or reduced valuation. This position requires a qualified appraisal and robust documentation, and it invites IRS scrutiny.

Estates taking a reduced valuation position for inaccessible Bitcoin should: (1) document exhaustive recovery efforts, including attempts to use all known seed phrases and hardware wallets, engagement of professional blockchain recovery services, and thorough search of the decedent's records; (2) retain a qualified appraiser to support the reduced value; and (3) consult with a Bitcoin-qualified tax attorney before taking this position on the return.

Unreported Bitcoin Discovered After Death

Executors sometimes discover Bitcoin holdings after the initial estate inventory — a second hardware wallet, an exchange account in a less common jurisdiction, or a paper wallet found years after death. If Form 706 has already been filed, the executor must file a supplemental or amended return to include the newly discovered Bitcoin. Failure to report known assets on Form 706 is a serious matter that can result in civil penalties and, in egregious cases, criminal exposure.

Executors should conduct a thorough search for digital assets before filing — including checking the decedent's email for exchange account notifications, reviewing password manager contents, examining hardware wallets found in the home, and consulting with the decedent's financial advisors and CPA for any accounts they were aware of. Our guide on Bitcoin estate planning includes a checklist for locating and inventorying digital assets during administration.

Bitcoin Held in Trusts

Bitcoin held in a revocable living trust is included in the decedent's gross estate for estate tax purposes — the revocable trust does not remove the asset from the estate. Bitcoin in an irrevocable trust may or may not be included depending on whether the decedent retained any interests that would cause inclusion under IRC Sections 2036, 2037, or 2038.

Bitcoin in an irrevocable life insurance trust (ILIT) that was never directly owned by the decedent is generally excluded. Bitcoin transferred to an irrevocable grantor trust where the decedent retained a prohibited interest (such as a power of amendment or the ability to receive trust income) may be fully includable despite the irrevocable form. This is a fact-intensive analysis that requires review of the trust document by a qualified estate attorney.

Hard Fork Coins

Hard forks — events that create new cryptocurrencies from an existing chain — are treated by the IRS as ordinary income when the recipient has dominion and control over the new coins. For estate purposes, hard fork coins received after death during the estate administration period are income of the estate (reported on Form 1041), not part of the decedent's gross estate. Hard fork coins received before death are part of the gross estate if the decedent held them at death.

Bitcoin Cash (BCH), Bitcoin SV (BSV), and other Bitcoin hard fork coins that the decedent received and held prior to death must be inventoried separately from Bitcoin and reported on Schedule B at their date-of-death fair market value. The decedent's failure to report these coins during life (a common situation, as many holders were unaware of their tax obligations) creates its own complications in the estate administration but does not change the estate tax reporting obligation.

Staking Rewards Accruing at Death

Revenue Ruling 2023-14 confirmed that staking rewards are taxable as ordinary income when received. For estate purposes, staking rewards that accrue and are credited to the decedent's account after the date of death — but before the estate distributes the assets — are income of the estate, not assets of the gross estate. They are reported on Form 1041 rather than Form 706.

However, the right to receive future staking rewards from coins in a staking position at death is an asset of the gross estate — it has a present value that may be includable. This is an evolving area with no clear IRS guidance specific to staking in the estate context. Executors with staking positions should consult with a cryptocurrency tax specialist.

Gift Tax Portability and Bitcoin: DSUE Election

The portability election — specifically, the election to allow the surviving spouse to use the deceased spouse's unused exemption (DSUE) — is one of the most valuable elections available in estate tax law, and it is particularly valuable in Bitcoin estates.

What Portability Means

When a person dies without having used their full federal estate tax exemption (~$15 million in 2026), any unused exemption can be "ported" to the surviving spouse — but only if the estate timely files Form 706 and makes the portability election. The surviving spouse can then use the DSUE amount to shelter additional wealth from estate tax at their own death or from gift tax during life.

For a Bitcoin-heavy family where Spouse A dies with a relatively modest estate — say, $3 million of Bitcoin — and Spouse B has a large Bitcoin position that is expected to grow significantly, the DSUE election could save millions of dollars. Without the election, Spouse A's unused ~$10.99 million of exemption is permanently forfeited. With the election, Spouse B adds that exemption to their own $15 million, giving them up to $30 million of combined sheltering capacity.

How to Make the DSUE Election

The portability election is made by filing a timely Form 706, even if no estate tax is owed. The executor checks the portability election box on the return (Part 6 of Form 706) and reports the DSUE amount. The IRS will then acknowledge the DSUE amount available to the surviving spouse.

The election must be made within the normal filing period, including extensions. There is a simplified procedure (Revenue Procedure 2022-32) that allows late portability elections up to five years after the decedent's death, but this procedure has conditions and is not available in all circumstances. It is always better to make the election timely.

Why Bitcoin Makes Portability Even More Important

Bitcoin's volatility creates a specific dynamic that makes portability particularly valuable. If Bitcoin appreciates significantly between Spouse A's death and Spouse B's death, the surviving spouse's estate could substantially exceed the single-person exemption even if it was modest at the time of Spouse A's death. The DSUE election captures Spouse A's unused exemption at the current exemption level and locks it in for the survivor's benefit — providing a buffer against future Bitcoin appreciation driving the surviving spouse's estate into taxable territory.

Additionally, if the estate tax exemption changes through future legislation, the DSUE amount locked in for the surviving spouse is preserved at the higher level used at Spouse A's death, not reduced by subsequent law changes. The One Big Beautiful Bill Act (2025) made permanent the elevated TCJA exemption, but this "exemption banking" feature remains a significant planning benefit.

See our comprehensive guide on working with a Bitcoin estate planning attorney for more detail on incorporating the DSUE election into a broader Bitcoin wealth transfer strategy.

Working With a Bitcoin-Qualified Estate Attorney and CPA

The single biggest mistake executors make with Bitcoin estates: hiring a traditional estate attorney or CPA who does not specialize in cryptocurrency and expecting them to handle the Bitcoin components competently. This is not a criticism of general estate practitioners — it is a recognition that Bitcoin creates a genuinely novel set of technical, legal, and tax issues that require specialized expertise.

What a General Estate Attorney Often Gets Wrong

Common errors made by generalist practitioners in Bitcoin estates include:

• Incorrect valuation methodology — using spot price rather than the high/low average, using an unofficial source, or failing to document the methodology adequately
• Incorrect Schedule assignment — placing Bitcoin on Schedule F (Other Miscellaneous Property) rather than Schedule B, or omitting it from the return entirely because the practitioner didn't know it was there
• Missing positions — failing to identify all exchange accounts, wallets, or other custody locations through inadequate asset inventory
• Incorrect treatment of hard fork coins — including post-death hard fork coins in the gross estate rather than treating them as estate income
• Missing the DSUE election — advising the client not to file Form 706 because no estate tax is owed, without recognizing the portability benefit
• Incomplete step-up documentation — failing to document the date-of-death FMV for each position in a way that protects the heirs' basis claim on future income tax returns

What to Look for in a Bitcoin Estate Attorney and CPA

When evaluating practitioners to assist with a Bitcoin estate, look for:

• Demonstrated cryptocurrency tax experience — ask for examples of prior cryptocurrency estate returns they have prepared or reviewed, not just general estate tax experience
• Familiarity with IRS Notice 2014-21 and Revenue Ruling 2023-14 — these are the foundational authorities; a practitioner who is unaware of them is not current
• Understanding of self-custody mechanics — they don't need to operate a hardware wallet, but they must understand the difference between self-custody and exchange custody, and the implications for estate administration
• Relationships with qualified appraisers — for significant Bitcoin positions, a qualified appraisal is often necessary; the attorney should know who to engage
• Willingness to coordinate with specialists — Bitcoin estate administration often requires a team: estate attorney, CPA, financial advisor, and potentially a forensic blockchain analyst or digital asset custodian

Questions to Ask Before Hiring

Use these questions to evaluate whether a practitioner is actually qualified to handle the Bitcoin components of the estate:

1. Have you previously prepared or reviewed a Form 706 that included Bitcoin or other cryptocurrency? How many?
2. What methodology do you use to establish the date-of-death fair market value for Bitcoin?
3. Which exchange or data source do you use for historical Bitcoin price data?
4. How do you handle Bitcoin held in self-custody wallets that the estate cannot yet access?
5. Are you familiar with the IRS treatment of hard fork coins and staking rewards in the estate context?
6. Do you know when a qualified appraisal is required versus recommended for cryptocurrency?
7. Who would you bring in for blockchain forensics if we needed to locate undisclosed positions?

A practitioner who cannot answer these questions fluently is not the right choice for a Bitcoin estate — regardless of their broader estate tax credentials. The cost of an incorrect Form 706 — penalties, interest, and IRS examination costs — far exceeds the cost of engaging a specialist.

Putting It All Together: A Form 706 Workflow for Bitcoin Estates

For practitioners working through a Bitcoin estate for the first time, the following workflow captures the key Bitcoin-specific steps alongside the standard Form 706 process:

1. Asset inventory — Identify all Bitcoin positions: exchange accounts, hardware wallets, paper wallets, multi-signature arrangements, Bitcoin in trusts. Obtain account statements and blockchain records as of date of death.
2. Valuation — Calculate date-of-death FMV using the high/low average method for each position. Document the methodology and data source. Retain a qualified appraiser for large or contested positions.
3. Evaluate alternate valuation date — If Bitcoin declined post-death and the estate is taxable, evaluate whether the alternate valuation date election reduces tax liability net of its effect on the step-up in basis.
4. Prepare Schedule B — List each Bitcoin position separately with description, quantity, unit FMV, and total FMV. Distinguish exchange-held from self-custody positions.
5. Hard fork and staking analysis — Identify any hard fork coins or staking positions. Determine which are includable in the gross estate and which are estate income.
6. Portability analysis — Evaluate whether a DSUE election is available and beneficial. If so, file Form 706 timely even if no estate tax is owed.
7. Step-up documentation — Create and retain a basis schedule showing each Bitcoin position's date-of-death FMV, which becomes each heir's starting basis. Distribute this documentation to heirs and their advisors.
8. Coordinate Form 1041 — Any post-death income from staking, mining, or hard fork coins is estate income. Coordinate with the estate's Form 1041 preparer to ensure consistent treatment.
9. File and retain records — File Form 706 with full supporting documentation. Retain all records for at least six years. Distribute step-up basis documentation to heirs immediately after filing.

Bitcoin estates are more administratively complex than traditional estates — but they are not unmanageable. The framework is established, the IRS authorities are clear on the foundational questions, and the gray areas, while real, are navigable with qualified counsel. The executor's job is to assemble the right team, document the methodology, and file a complete and accurate return.

For a broader overview of Bitcoin wealth transfer mechanics, including how Form 706 fits into a larger estate plan, see our Bitcoin estate planning guide. To understand the full landscape of Bitcoin inheritance planning beyond the tax return, our guide on what happens to Bitcoin after death covers the practical, legal, and technical dimensions of Bitcoin succession in full.