In This Guide
- When Form 706 Is Required
- Filing Deadline and Extensions
- Bitcoin Valuation: Date of Death vs. Alternate Valuation Date
- Schedule B vs. Schedule F: Where Does Bitcoin Go?
- Valuing Bitcoin Across Multiple Wallets and Exchanges
- Cost Basis Documentation and Form 8949 Crossover
- The Discovery Problem: Self-Custody and Disclosure
- Penalties for Undervaluation
- Qualified Appraisals for Large Crypto Holdings
- Portability and the DSUE Amount
- Paying Estate Tax When the Estate Is Bitcoin-Heavy
- State Estate Tax Returns
- Case Study: The Morrison Estate
When Form 706 Is Required
Under the One Big Beautiful Bill Act (OBBBA), which took effect January 1, 2026, the federal estate tax exemption is $15,000,000 per person. The annual gift tax exclusion is $19,000 per donee. If a decedent's gross estate — including all Bitcoin holdings at fair market value on the date of death — exceeds $15 million, the executor must file IRS Form 706, United States Estate (and Generation-Skipping Transfer) Tax Return.
But here is the detail that catches many executors off guard: Form 706 is also required when the estate falls below the exemption threshold if the surviving spouse wants to elect portability of the deceased spouse's unused exclusion (DSUE) amount. There is no other mechanism to claim it. If the executor does not file Form 706, the DSUE is forfeited — permanently.
For a Bitcoin holder whose estate is worth $10 million today, that might seem academic. But Bitcoin's price volatility means a $10 million estate could be worth $25 million by the time the surviving spouse dies. Filing Form 706 to lock in the decedent's unused $15 million exemption — giving the surviving couple an effective $30 million combined exemption — is one of the highest-value administrative acts an executor can perform. We cover this in depth in our portability election guide.
2026 Key Numbers
Federal estate tax exemption: $15,000,000 per person (OBBBA) · Top estate tax rate: 40% · Annual gift exclusion: $19,000 per donee · BTC price (approx.): $74,000 · BTC needed to exceed exemption: ~203 BTC (before other assets)
Filing Deadline and Extensions
Form 706 is due nine months after the date of death. If the decedent died on March 1, 2026, the return is due December 1, 2026. The executor may request an automatic six-month extension by filing Form 4768, Application for Extension of Time to File a Return and/or Pay U.S. Estate (and Generation-Skipping Transfer) Taxes, before the original due date.
Two critical points for Bitcoin estates:
- The extension to file is not an extension to pay. Estimated estate tax is still due at the nine-month mark. Underpayment accrues interest from that date. For an estate that needs to liquidate Bitcoin to pay the tax — and may be waiting for favorable market conditions — this creates real tension between tax optimization and compliance.
- The alternate valuation date election (§2032) requires filing Form 706 on time. If the return is filed late — even one day — the executor loses the ability to elect the alternate valuation date. Given Bitcoin's volatility, this election alone can save hundreds of thousands or millions in estate tax. More on this below.
The portability election also requires a timely filed return, though the IRS has provided relief under Rev. Proc. 2022-32 for late portability elections within certain timeframes. Do not rely on this. File on time.
Bitcoin Valuation: Date of Death vs. Alternate Valuation Date
The default rule is straightforward: all estate assets are valued at their fair market value on the date of death. For Bitcoin, this means the price at the moment of death — or, more practically, the daily closing price on the date of death from a recognized exchange.
The IRS has not issued formal guidance on which exchange price constitutes "fair market value" for Bitcoin on a specific date. In practice, executors use a composite of major exchange prices (Coinbase, Kraken, Bitstamp) or a recognized index like the CoinDesk Bitcoin Price Index (XBX). The key is consistency and documentation. Pick a methodology, document it, and apply it uniformly across all holdings.
The Alternate Valuation Date Under §2032
Section 2032 of the Internal Revenue Code allows the executor to elect to value all estate assets as of the date six months after death, rather than the date of death. This is the alternate valuation date, and for Bitcoin estates, it can be transformative.
But §2032 comes with two hard prerequisites that both must be met:
- The election must decrease the gross value of the estate. If Bitcoin's price rose in the six months after death, the alternate valuation date is unavailable.
- The election must decrease the amount of estate tax due. This is usually satisfied automatically when the first condition is met, but not always — particularly when the estate qualifies for large deductions that would eliminate the tax regardless of valuation.
The election is all-or-nothing. You cannot cherry-pick — using date-of-death values for assets that appreciated and alternate values for assets that declined. Every asset in the estate is revalued.
There is a critical secondary effect: the alternate valuation date also resets the stepped-up basis for inherited assets. If you elect the alternate valuation date and Bitcoin dropped 15% in those six months, the heirs inherit the Bitcoin with a lower cost basis. This means more capital gains tax when they eventually sell. The executor must weigh the immediate estate tax savings against the long-term income tax cost to the beneficiaries.
Critical Warning
If any Bitcoin is sold, distributed, or otherwise disposed of during the six-month alternate valuation period, those specific assets are valued at their disposition date — not the six-month date. The executor must track every transaction during this window.
Schedule B vs. Schedule F: Where Does Bitcoin Go?
Form 706 uses a series of lettered schedules (A through I) to categorize different asset types. The question for Bitcoin: is it reported on Schedule B (Stocks and Bonds) or Schedule F (Other Miscellaneous Property Not Reportable Under Any Other Schedule)?
The IRS treats cryptocurrency as property — not currency, not a security. In IRS Notice 2014-21 and subsequent guidance, virtual currency is classified as property for federal tax purposes. This places it squarely on Schedule F.
Some practitioners report exchange-held Bitcoin on Schedule B, reasoning that exchange balances function more like brokerage accounts. This is defensible but not technically correct under current guidance. The conservative and recommended approach:
- Exchange-held Bitcoin (Coinbase, Kraken, etc.): Schedule F, with a description that identifies the exchange, account number (last four digits), and quantity of BTC held.
- Self-custody Bitcoin (hardware wallets, multisig): Schedule F, with a description identifying the wallet type and quantity. Do not include private keys, seed phrases, or full addresses on the return.
- Lightning Network balances: Schedule F, identified separately with the channel capacity and balance at date of death.
- Bitcoin held in a trust: May not appear on the decedent's Form 706 at all if the trust is an irrevocable non-grantor trust. Revocable trusts are included on the decedent's return.
Each line item on Schedule F requires: a description of the property, the fair market value at the applicable valuation date, and (if applicable) the alternate value. List each wallet or exchange account as a separate line item — do not aggregate all Bitcoin into a single entry. The IRS wants specificity.
Valuing Bitcoin Across Multiple Wallets and Exchanges
A decedent who held Bitcoin across five different locations — two exchanges, two hardware wallets, and a Lightning node — presents a valuation challenge that has no parallel in traditional estate administration. There is no central brokerage statement. There is no DTCC. The executor must independently verify the balance of each location.
Exchange-Held Bitcoin
Exchanges are the easiest. The executor obtains death certificates, provides them to the exchange's compliance team, and requests an account statement as of the date of death (and, if applicable, the alternate valuation date). Most major exchanges (Coinbase, Kraken, Gemini) have established processes for estate claims, though they can take 30-90 days.
The exchange statement will show the exact BTC balance and typically the USD value as of the requested date, using the exchange's own spot price. This is your primary documentation. Keep the original statements — the IRS may request them on examination.
Hardware Wallet and Self-Custody Bitcoin
This is where Bitcoin estates diverge from everything else. The executor must:
- Locate the wallets. This requires either a comprehensive estate plan that documents wallet locations and access procedures, or a forensic search of the decedent's devices, papers, and digital accounts.
- Access the wallets. Hardware wallets require the device plus the PIN. If the PIN is unavailable, the seed phrase can restore the wallet on a new device. If neither is available, the Bitcoin may be permanently inaccessible — but it is still part of the gross estate if the executor knows it exists.
- Document the balance. Screenshot the wallet balance on the date of death (if you have access by then) or use blockchain explorer records for the known addresses. The blockchain is a public ledger — if you know the addresses, you can prove the balance at any point in time via block height.
- Establish fair market value. Apply the same pricing methodology used for exchange-held Bitcoin. Consistency across all holdings is essential.
Lightning Network Balances
Lightning Network balances present a unique challenge. Funds locked in Lightning channels are not visible on the base-layer blockchain until the channel is closed. The executor must access the Lightning node software (or its backups) to determine channel balances. If the decedent ran a routing node, there may be both local and remote balances across dozens of channels. Only the local balance is the decedent's property.
Document the Lightning balance separately. Close all channels to the on-chain wallet before distributing — attempting to transfer a running Lightning node to heirs is operationally risky and creates valuation ambiguity.
Bitcoin Tax Strategy
Mining Creates the Most Powerful Tax Deductions in Bitcoin
If the decedent held Bitcoin acquired through mining operations, the tax basis and depreciation schedules add another layer of complexity to Form 706. Mining infrastructure — ASICs, electrical systems, hosting contracts — may also be includable estate assets. Understanding the intersection of mining tax treatment and estate tax is critical.
Explore Bitcoin Mining Tax Strategy →Cost Basis Documentation and Form 8949 Crossover
Form 706 reports fair market value at death — not cost basis. However, cost basis documentation matters for two reasons:
- The stepped-up basis. Under IRC §1014, inherited property receives a basis equal to its fair market value at death (or the alternate valuation date, if elected). This means the Form 706 valuation becomes the cost basis for the heirs. Getting the Form 706 value right is not just an estate tax issue — it is an income tax issue for every future sale.
- Pre-death transactions. If the decedent made gifts of Bitcoin during life, the executor needs historical cost basis to determine whether any gift tax was due and to calculate the adjusted basis for gifted property. This intersects with Form 8949 reporting for the decedent's final income tax return (Form 1040 for the year of death).
The executor should compile a complete transaction history for all Bitcoin holdings. Exchange records, blockchain transaction logs, and any purchase receipts should be organized chronologically. This serves both the estate tax return and the final income tax return, and it provides the heirs with documentation they will need when they eventually sell.
The Discovery Problem: Self-Custody and Disclosure
Here is the uncomfortable reality that some executors — and some beneficiaries — would rather not confront: the IRS may have no independent way to know that the decedent held self-custody Bitcoin.
Exchange-held Bitcoin generates 1099 forms. The IRS receives copies. There is a paper trail. But Bitcoin held on a Ledger Nano in a safe deposit box, secured by a seed phrase written on a steel plate in a fireproof safe? The IRS has no visibility into that.
This creates a temptation that the executor must resist absolutely. The obligation to report is clear:
- IRC §6018 requires the executor to report the entire gross estate on Form 706.
- The executor signs under penalties of perjury.
- Willful omission of known assets is tax fraud — a federal crime carrying up to five years in prison and a $250,000 fine, in addition to the tax, interest, and civil penalties.
- Beneficiaries who receive unreported Bitcoin and later sell it on an exchange will create a paper trail that can trigger an IRS examination of the estate return.
The IRS audit risk for Bitcoin estates is growing. The IRS has hired cryptocurrency specialists. Blockchain analytics firms (Chainalysis, TRM Labs) contract with the government. Exchange data is increasingly shared via John Doe summonses. The fact that the IRS cannot see self-custody Bitcoin today does not mean they will not trace it tomorrow — and the statute of limitations on fraud is unlimited.
Executor Liability
An executor who knowingly omits Bitcoin from Form 706 is personally liable for the resulting tax, interest, and penalties — even if the beneficiaries pressured them to do so. The executor's fiduciary duty runs to the estate and its creditors (including the IRS), not to the wishes of individual beneficiaries. Report everything.
Penalties for Undervaluation
Even when Bitcoin is reported, undervaluation carries severe consequences. The IRS imposes accuracy-related penalties under IRC §6662:
- 20% penalty on any underpayment attributable to a "substantial estate or gift tax valuation understatement" — defined as a reported value that is 65% or less of the correct value.
- 40% penalty for a "gross valuation misstatement" — a reported value that is 40% or less of the correct value.
For Bitcoin, the most common valuation dispute is not outright fraud — it is using a stale or cherry-picked price. If the decedent died at 2:00 PM Eastern on a day when Bitcoin traded between $71,000 and $76,000, and the executor reports a value of $71,000 when the daily volume-weighted average was $74,200, the IRS may challenge the methodology.
The defense is documentation. Use a recognized pricing index, document the methodology in a memo attached to the return, and apply it consistently. If the total crypto holding exceeds $5 million, strongly consider a qualified appraisal.
Qualified Appraisals for Large Crypto Holdings
While the IRS does not explicitly require a qualified appraisal for cryptocurrency on Form 706 (unlike, say, closely held business interests or real estate), the regulations under §7517 and the general valuation rules make a qualified appraisal the strongest possible defense against an IRS challenge.
A qualified appraisal for Bitcoin should include:
- Identification of all wallets and exchange accounts, with balances as of the valuation date
- The pricing methodology used (composite exchange rate, specific index, volume-weighted average)
- Consideration of liquidity discounts for extremely large holdings — selling 300 BTC in a single day would move the market. A 2-5% liquidity discount may be defensible for holdings above a certain threshold, though this area is legally untested for Bitcoin
- Blockchain verification of balances via block explorer screenshots or independently verified transaction records
- The appraiser's qualifications — they should have demonstrable expertise in cryptocurrency markets, not just general appraisal credentials
The appraisal fee is deductible as an estate administration expense on Schedule J of Form 706.
Portability and the DSUE Amount
Portability allows the surviving spouse to use the deceased spouse's unused estate tax exemption — the Deceased Spousal Unused Exclusion (DSUE) amount. Under OBBBA, with a $15 million per-person exemption, a married couple can potentially shield $30 million from estate tax through portability.
To elect portability, the executor must:
- File a complete and timely Form 706, even if the estate is below the filing threshold.
- Check Box 5 on Page 1 of Form 706, which elects to transfer the DSUE to the surviving spouse.
- Complete all required schedules. The IRS requires a complete return — you cannot file a stripped-down Form 706 with just the portability election. Every asset must be listed and valued.
For Bitcoin estates, portability is especially important because of price volatility. A surviving spouse holding 200 BTC may be well under the exemption today and well over it in five years. The DSUE provides an insurance policy against future appreciation — and it costs nothing but the time to file the return.
Our surviving spouse portability guide walks through the complete strategy for married Bitcoin holders.
DSUE Calculation Example
Decedent's applicable exclusion amount: $15,000,000. Taxable estate (after deductions): $8,200,000. DSUE transferred to surviving spouse: $15,000,000 − $8,200,000 = $6,800,000. The surviving spouse now has an effective exemption of $15,000,000 + $6,800,000 = $21,800,000.
Paying Estate Tax When the Estate Is Bitcoin-Heavy
When the estate owes federal estate tax and the primary asset is Bitcoin, the executor faces a practical problem: the IRS does not accept Bitcoin. Estate tax must be paid in U.S. dollars. This creates three options, each with its own complications.
Option 1: Sell Bitcoin to Pay the Tax
The most straightforward approach. The executor liquidates enough Bitcoin to cover the estate tax liability, plus a buffer for market movement between the sale and payment.
Because inherited Bitcoin receives a stepped-up basis to the date-of-death value, selling shortly after death typically generates minimal capital gain (or loss, if the price dropped). The executor should document the sale price and calculate any gain or loss for the estate's income tax return (Form 1041).
Timing matters. If the executor is considering the alternate valuation date election, selling Bitcoin during the six-month window complicates the valuation — those sold units are valued at their sale price, not the six-month date price.
Option 2: §6161 Extension for Reasonable Cause
Under IRC §6161, the IRS may grant an extension of up to 12 months (renewable for additional 12-month periods, up to 10 years total in hardship cases) to pay the estate tax if the executor can demonstrate "reasonable cause." For a Bitcoin-heavy estate, reasonable cause might include:
- Bitcoin price is temporarily depressed relative to the date-of-death valuation, and immediate liquidation would realize a loss that harms the beneficiaries
- Self-custody Bitcoin is in a complex multisig arrangement that requires time to access
- Exchange accounts are frozen pending the estate claim process
The extension to pay accrues interest at the federal short-term rate plus 3% (currently approximately 7-8%). It is not a free pass — it is a loan from the government at a moderate interest rate.
Option 3: §6166 Installment Payments
Section 6166 allows estates where a closely held business constitutes more than 35% of the adjusted gross estate to pay the estate tax attributable to that business interest in installments over up to 14 years (4-year deferral, then 10 annual payments), with interest on the deferred amount at a favorable 2% rate on the first $1.89 million of tax (2026 figure).
Can Bitcoin qualify as a "closely held business interest" under §6166? In most cases, no. Simply holding Bitcoin as an investment is not a business. However, if the decedent operated a Bitcoin mining business, a Lightning routing node as a business, or a Bitcoin-focused trading operation structured as a business entity, the business interest (including the Bitcoin held within it) may qualify. This is a highly fact-specific determination that requires experienced tax counsel.
Bitcoin Mining and Estate Tax: A Unique Intersection
Bitcoin mining operations can qualify as closely held businesses under §6166, unlocking installment payment options unavailable to passive Bitcoin holders. Mining also generates significant depreciation deductions that reduce the taxable estate during life. Understanding these advantages is critical for estate planning.
Get the Mining Tax Strategy Guide →State Estate Tax Returns
The federal Form 706 is only part of the picture. Twelve states and the District of Columbia impose their own estate taxes, often with exemption thresholds far below the federal level:
| State | 2026 Exemption | Top Rate |
|---|---|---|
| Massachusetts | $2,000,000 | 16% |
| Oregon | $1,000,000 | 16% |
| New York | ~$7,160,000 | 16% |
| Washington | ~$2,193,000 | 20% |
| Connecticut | $15,000,000 | 12% |
| Hawaii | $5,490,000 | 20% |
| Illinois | $4,000,000 | 16% |
| Maine | ~$6,800,000 | 12% |
| Maryland | $5,000,000 | 16% |
| Minnesota | ~$3,000,000 | 16% |
| Rhode Island | ~$1,774,583 | 16% |
| Vermont | $5,000,000 | 16% |
| District of Columbia | ~$4,710,800 | 16% |
A Bitcoin holder domiciled in Oregon with 100 BTC ($7.4 million) would owe no federal estate tax but would face Oregon estate tax on approximately $6.4 million above the state exemption. The state return is a separate filing with its own deadlines, forms, and valuation rules — though most states piggyback on the federal Form 706 valuations.
State portability rules also vary. Most states that impose an estate tax do not offer portability. Oregon, for example, has no portability provision. This means state estate tax planning requires different strategies — typically irrevocable trusts funded at or near the state exemption amount. See our comprehensive estate planning guide for state-specific strategies.
Case Study: The Morrison Estate
Let us walk through a realistic Form 706 filing for a Bitcoin estate, schedule by schedule.
The Facts
James Morrison, age 62, died on September 15, 2025, domiciled in Washington state. He is survived by his wife, Catherine. At death, James held:
- Coinbase account: 120.00000000 BTC
- Kraken account: 85.00000000 BTC
- Ledger Nano X #1 (home safe): 55.00000000 BTC
- Coldcard Mk4 (bank safe deposit box): 30.00000000 BTC
- Lightning node (Umbrel, home server): 10.00000000 BTC across 47 channels
- Other assets: Primary residence ($850,000), brokerage account ($320,000), checking/savings ($95,000), life insurance payable to Catherine ($500,000)
Total BTC: 300.00000000
Step 1: Establishing Date-of-Death Value
On September 15, 2025, Bitcoin traded at approximately $74,000 per BTC. The executor (Catherine, serving as personal representative) used the CoinDesk XBX index closing price of $74,012.47.
Bitcoin valuation at date of death: 300 BTC × $74,012.47 = $22,203,741
Total gross estate:
- Bitcoin: $22,203,741
- Residence: $850,000
- Brokerage: $320,000
- Cash: $95,000
- Life insurance (included because payable to estate — an error in the original designation): $500,000
Gross estate: $23,968,741
Step 2: Form 706 Schedules
Part 1 — Decedent and Executor (Page 1): Basic identifying information. Catherine listed as executor. Estate's EIN obtained from Form SS-4.
Schedule A — Real Estate: Primary residence, $850,000. Supported by a comparable market analysis from a licensed appraiser.
Schedule B — Stocks and Bonds: Brokerage account holdings — individual stock and bond positions, $320,000 total. Bitcoin is not listed here.
Schedule C — Mortgages, Notes, and Cash: Checking and savings, $95,000.
Schedule D — Insurance on the Decedent's Life: $500,000 life insurance policy. Because the policy was payable to the estate (rather than to Catherine directly or to an irrevocable life insurance trust), it is includable. A costly error — this could have been excluded entirely with proper beneficiary designation.
Schedule F — Other Miscellaneous Property: This is where the Bitcoin lives.
| Item | Description | Date-of-Death Value | Alternate Value |
|---|---|---|---|
| 1 | 120.00000000 Bitcoin (BTC), held at Coinbase, Inc., account ending ×4821. Valued at CoinDesk XBX closing price 9/15/2025. | $8,881,496 | $7,549,272 |
| 2 | 85.00000000 Bitcoin (BTC), held at Payward, Inc. d/b/a Kraken, account ending ×7293. Valued at CoinDesk XBX closing price 9/15/2025. | $6,291,060 | $5,347,401 |
| 3 | 55.00000000 Bitcoin (BTC), self-custody, Ledger Nano X hardware wallet. Blockchain addresses documented in Exhibit F-1. Valued at CoinDesk XBX closing price 9/15/2025. | $4,070,686 | $3,460,083 |
| 4 | 30.00000000 Bitcoin (BTC), self-custody, Coldcard Mk4 hardware wallet, safe deposit box, First National Bank, Seattle, WA. Blockchain addresses documented in Exhibit F-1. Valued at CoinDesk XBX closing price 9/15/2025. | $2,220,374 | $1,887,318 |
| 5 | 10.00000000 Bitcoin (BTC), Lightning Network channels (47 channels, Umbrel node). Channels closed to on-chain wallet post-death. Valued at CoinDesk XBX closing price 9/15/2025. | $740,125 | $629,106 |
Total Schedule F (Bitcoin): $22,203,741 (date of death) / $18,873,180 (alternate valuation date)
Step 3: The Alternate Valuation Date Decision
Six months after James's death — March 15, 2026 — Bitcoin was trading at approximately $62,911, a decline of roughly 15% from the date-of-death price. Catherine's estate attorney and CPA ran both calculations:
Scenario A: Date-of-Death Valuation
- Gross estate: $23,968,741
- Less: marital deduction (Schedule M, property passing to Catherine): $850,000 (residence) + $320,000 (brokerage) + $95,000 (cash) = $1,265,000
- Less: administration expenses (Schedule J): $185,000
- Taxable estate: $22,518,741
- Less: applicable exclusion ($15,000,000)
- Estate tax on $7,518,741 at 40%: $3,007,496
Scenario B: Alternate Valuation Date
- Gross estate (Bitcoin at alternate value + other assets unchanged): $20,638,180
- Less: marital deduction: $1,265,000
- Less: administration expenses: $185,000
- Taxable estate: $19,188,180
- Less: applicable exclusion ($15,000,000)
- Estate tax on $4,188,180 at 40%: $1,675,272
Estate tax savings from alternate valuation date: $3,007,496 − $1,675,272 = $1,332,224
Both prerequisites for §2032 are met: the gross estate decreased, and the estate tax decreased. Catherine elected the alternate valuation date.
Step 4: The Portability Election
Even though Catherine already benefits from the marital deduction on assets passing directly to her, the executor also elected portability (Box 5, Page 1 of Form 706). The DSUE calculation:
- James's applicable exclusion: $15,000,000
- James's taxable estate (after alternate valuation): $19,188,180
- DSUE: $0 (the taxable estate exceeded the exclusion, so there is no unused exclusion to port)
In this case, portability yields nothing because the taxable estate already exceeded the exemption. But had the estate been smaller — or had more assets passed outright to Catherine via the marital deduction — the DSUE would have been valuable. The filing cost was already incurred, so checking the box was prudent regardless.
Step 5: Paying the Tax
The estate owed $1,675,272 in federal estate tax. Catherine sold 27 BTC on Coinbase at an average price of $63,400 (roughly the market price in the weeks following the alternate valuation date), generating $1,711,800 in proceeds. Because the stepped-up basis was the alternate valuation date price, the small gain ($63,400 sale price vs. ~$62,911 alternate value) generated minimal income tax on the estate's Form 1041.
Washington state estate tax added another obligation. Washington's exemption is approximately $2,193,000, with a top rate of 20%. The Morrison estate owed an additional estimated $2,480,000 in Washington estate tax — a significant amount that required selling another 39 BTC.
Total BTC liquidated for tax payments: approximately 66 BTC out of 300. Catherine retained 234 BTC.
What the Morrison Estate Did Right
- James maintained a detailed estate planning checklist that documented every wallet, exchange account, and Lightning channel, with access instructions stored in a sealed letter with his estate attorney
- Catherine filed Form 706 within the nine-month deadline, preserving the alternate valuation date election
- A qualified cryptocurrency appraiser documented the valuation methodology
- Each Bitcoin holding was listed as a separate Schedule F line item with full descriptions
- Lightning channels were closed promptly to eliminate ongoing operational risk
What Could Have Been Better
- The life insurance beneficiary designation should have named Catherine directly (or an ILIT), not the estate — this added $500,000 to the gross estate unnecessarily
- No lifetime gifting strategy had been implemented — annual gifts of BTC to Catherine, children, or an irrevocable trust during James's lifetime would have reduced the taxable estate
- Washington estate tax planning (e.g., a credit shelter trust funded at the state exemption amount) was never implemented
- A GRAT or CRT funded with Bitcoin during a low-price period could have transferred significant value out of the estate before death
Filing Form 706 for a Bitcoin Estate: The Complete Checklist
Based on everything above, here is the operational checklist for executors:
- Obtain the EIN. File Form SS-4 immediately after appointment as executor.
- Locate all Bitcoin. Search devices, papers, exchanges, email accounts. Use the decedent's estate plan documentation. Check for hardware wallets, seed phrase backups, exchange accounts, Lightning nodes, mining operations, and DeFi positions.
- Freeze exchange accounts. Contact each exchange with death certificates and letters testamentary. Request account statements as of the date of death.
- Document self-custody balances. Screenshot wallet balances. Record blockchain addresses and verify balances via block explorer at the date-of-death block height.
- Close Lightning channels. Move all Lightning funds on-chain. Document channel balances before closing.
- Establish valuation methodology. Select a pricing index or composite methodology. Document it in a memo. Apply it consistently.
- Consider a qualified appraisal. For holdings over $5 million, this is strongly recommended.
- Calculate both date-of-death and alternate valuation date values. Run both tax scenarios before the filing deadline.
- Prepare all Form 706 schedules. Bitcoin on Schedule F. Each wallet/exchange as a separate line item.
- Elect portability if married. Check Box 5 on Page 1.
- Determine payment strategy. Sell BTC, request §6161 extension, or qualify for §6166 installments.
- File state estate tax returns. Check the decedent's state of domicile and any state where real property is located.
- File Form 706 by the deadline. Nine months after death. File Form 4768 for a six-month extension if needed — but file it before the original deadline.
- Retain all documentation. Exchange statements, blockchain records, appraisals, pricing data, and the valuation memo. The IRS has three years to examine (six years if gross income is understated by more than 25%; unlimited for fraud).
The Bottom Line
Filing Form 706 for a Bitcoin estate is not fundamentally different from any other estate tax return — it is just harder in every dimension. The assets are harder to locate, harder to value, harder to document, and harder to liquidate for tax payment. The executor's margin for error is thinner because Bitcoin's volatility amplifies every mistake.
The alternate valuation date election alone saved the Morrison estate over $1.3 million. Proper documentation on Schedule F prevented an IRS challenge. Timely filing preserved both the alternate valuation date and the portability election.
None of this happens by accident. It happens because the decedent created a comprehensive estate plan during life, and the executor followed a disciplined process after death. If you hold significant Bitcoin and have not documented your holdings, access procedures, and estate plan — your executor will be filing Form 706 in the dark. Do not make them do that.