- What a Bypass Trust Is (and What It Isn't)
- How It Shelters Bitcoin From Estate Tax at Both Deaths
- 2026 Exemption Amounts: Current Law
- Funding the Bypass Trust With Bitcoin vs. Cash
- Trustee Considerations for Volatile Assets
- Bypass Trust vs. portability election
- Bypass Trust vs. dynasty trust
- Bitcoin Appreciation Inside the Bypass Trust: The Math
- Step-Up Basis: What You Lose With a Bypass Trust
- Community Property States: Bypass Trust Complications
- How to Structure Trustee Authority Over Volatile Bitcoin
- FAQ: 8 Questions Married Bitcoin Holders Ask
For married Bitcoin holders with meaningful wealth, no estate planning tool is more powerful — or more misunderstood — than the bypass trust. Also called a credit shelter trust, B trust, or family trust, it is the original solution to a problem that predates Bitcoin by decades: how do you use both spouses' estate tax exemptions when everything is owned jointly?
Bitcoin makes this question more urgent than it has ever been. An asset that can compound aggressively over decades, held by spouses who may live decades apart in age, creates estate tax exposure that simple portabBitcoin Irrevocable Life Insurance Trusty elections cannot fully address. The bypass trust is the structural solution — but only if it's executed correctly and with a clear-eyed understanding of its tradeoffs.
This guide goes deep on the mechanics, the Bitcoin-specific math, and the planning decisions that determine whether a bypass trust is the right choice for your situation.
What a Bypass Trust Is (and What It Isn't)
A bypass trust is an irrevocable trust created at the death of the first spouse. Its defining feature: assets placed in the bypass trust at the first death are permanently excluded from both spouses' taxable estates. The trust "bypasses" the surviving spouse's estate — and therefore bypasses estate tax at the second death.
The term "credit shelter trust" reflects the mechanism: the trust shelters assets within the first spouse's estate tax exemption (the "unified credit"). Instead of passing those assets to the surviving spouse (where they'd be estate-tax-free under the marital deduction but added to the survivor's taxable estate), the assets are directed into the trust and the first spouse's exemption is applied against them.
Bypass trust: Describes the function — assets bypass the surviving spouse's taxable estate.
Credit shelter trust: Describes the mechanism — the first spouse's unified credit shelters the assets.
B Trust: From the old "A-B trust" structure — the A trust receives assets above the exemption (marital trust), the B trust receives assets up to the exemption (bypass trust).
Family trust: Common informal name, especially when the surviving spouse and children are all beneficiaries.
What a bypass trust is not: it is not a revocable living trust (which provides no estate tax benefit). It is not a dynasty trust, though the two share structural similarities. It is not a grantor trust, though it can be drafted to include grantor trust features. And it is not a QTIP trust, which qualifies for the marital deduction and is therefore included in the surviving spouse's estate.
The critical feature for Bitcoin holders: all appreciation inside the bypass trust after it's funded occurs permanently outside both taxable estates. If the trust receives Bitcoin worth $3M and that Bitcoin appreciates to $30M over the next twenty years, the $27M of appreciation is sheltered from estate tax at both deaths.
Never include seed phrases, private keys, or Bitcoin wallet recovery information in the bypass trust document, will, or any instrument that may become public record. Trust documents can be reviewed in certain court proceedings and may be accessible to more parties than intended. The trust should reference a separately maintained custody protocol — held in a secure, private location — without disclosing the actual keys or recovery information. multi-signature custody arrangements designed for inheritance are strongly preferred over single-key hot wallet solutions.
How It Shelters Bitcoin From Estate Tax at Both Deaths
The bypass trust creates permanent estate tax shelter in two steps:
Step One — At the first death: Spouse A's will (or revocable trust) directs assets up to the applicable exemption amount into the bypass trust. These assets are included in Spouse A's gross estate and "use" Spouse A's estate tax exemption. If the exemption is sufficient, no estate tax is owed. The bypass trust is now funded and irrevocable.
Step Two — At the second death: The assets in the bypass trust have appreciated — potentially dramatically, if funded with Bitcoin. Those assets are distributed to the final beneficiaries (typically children or grandchildren) without being included in Spouse B's taxable estate. Only the assets Spouse B owned directly are subject to estate tax at their death.
The result: the bypass trust's Bitcoin — both the original value and all subsequent appreciation — completely escapes estate tax at the second death. This is not a deferral. The appreciation is permanently removed from the transfer tax system.
The math speaks for itself. For Bitcoin families with long time horizons, the bypass trust can shelter tens of millions in appreciation from estate tax. The question isn't whether it's powerful — it's whether the tradeoffs are acceptable for your specific situation.
2026 Exemption Amounts: Current Law
The bypass trust is sized by the applicable estate tax exemption at the time of the first spouse's death. The exemption determines how much can go into the trust without triggering estate tax. Understanding the current and potential future exemption amounts is essential for sizing the bypass trust correctly.
As of 2026, the estate tax exemption is inflation-indexed under current law. The 2017 Tax Cuts and Jobs Act substantially increased the exemption. The One Big Beautiful Bill Act, signed into law in 2025, made that increase permanent at approximately $15 million per individual. Estate plans drafted before 2026 should be reviewed to confirm they reflect current law.
A well-drafted bypass trust doesn't fix a dollar amount for funding — it uses formula clauses that automatically fund the bypass trust with the maximum amount shielded by the available exemption, whatever that turns out to be at the date of death. This way the trust captures the full exemption benefit regardless of whether exemptions are higher or lower than expected. If Congress sets a lower exemption, the trust receives a smaller amount; if exemptions remain high, the trust receives more.
The practical implication: if exemptions are currently elevated and there is risk of them declining, funding a bypass trust now (while the exemption is large) may shelter more Bitcoin from the estate tax system than waiting and using portability in a lower-exemption environment.
For married couples in 2026, the strategic calculus favors using irrevocable planning structures aggressively now if you believe exemptions may decline. A bypass trust funded at today's higher exemption locks in that shelter permanently. Portability does the same, but only for the fixed dollar amount of the deceased spouse's unused exemption — it doesn't shelter future appreciation.
Funding the Bypass Trust With Bitcoin vs. Cash
The decision of which assets fund the bypass trust is as important as the decision to create one. For Bitcoin families, the asset selection question has significant consequences.
Why Bitcoin Is the Ideal Bypass Trust Asset
The bypass trust's core benefit is sheltering future appreciation from estate tax. An asset that appreciates significantly over time is the ideal bypass trust asset — because every dollar of appreciation inside the trust is permanently tax-free from an estate tax perspective.
Cash and bonds in a bypass trust grow slowly. The estate tax shelter is modest because the appreciation is modest. Bitcoin in a bypass trust, with its historical propensity for significant long-term appreciation, generates dramatically more estate tax shelter per dollar of exemption used.
Consider: $5M of cash in a bypass trust at 4% annual growth becomes ~$11M over twenty years. $5M of Bitcoin in a bypass trust has historically produced multiples beyond that. The difference in estate tax shelter is not marginal — it can be the difference between an effective estate plan and an inadequate one.
The Basis Trade-Off
The counterargument: Bitcoin in a bypass trust doesn't receive a step-up at the second death. Cash and securities do receive a step-up if held by the surviving spouse. So funding the bypass trust with Bitcoin "costs" the heirs the capital gains they would have avoided on a stepped-up Bitcoin position.
This trade-off resolves differently depending on the estate's size:
- Large, taxable estate: Estate tax (40%) is the dominant concern. Capital gains (up to ~23.8% including net investment income tax) is secondary. Fund the bypass trust with Bitcoin to eliminate the larger tax.
- Moderate estate under exemption: Estate tax is not a concern. Capital gains at death can be eliminated entirely via the step-up. Fund the bypass trust with lower-appreciation assets; keep Bitcoin with the surviving spouse for the second step-up.
- Mixed estate straddling the exemption: This is where competent estate planning earns its fee. The answer depends on projections of Bitcoin's value, the ages of both spouses, likely exemption changes, and state estate tax rules.
Practical Funding Challenges
Funding a bypass trust with Bitcoin requires transferring custody of the Bitcoin to the trust's custodial structure. This is not merely a paper transfer. The trust needs:
- A separate Bitcoin custody arrangement in the trust's name (or held by a qualified custodian for the trust)
- A trustee with the authority and technical competence to manage Bitcoin
- Clear trustee instructions regarding custody protocol, key management, and security
- No seed phrases or private keys embedded in trust documents
For hardware wallet held Bitcoin, the estate attorney and trustee need to plan the mechanics of trust funding carefully. Bitcoin transferred into a bypass trust cannot be casually moved back out — the trust is irrevocable.
Trustee Considerations for Volatile Assets
Selecting the right trustee for a bypass trust holding Bitcoin requires thinking through scenarios that most traditional estate attorneys haven't faced. Bitcoin introduces volatility, custody complexity, and technical requirements that surpass those of any other trust asset class.
What a Bitcoin Trustee Must Be Able to Do
- Custody and security: The trustee must be able to securely hold Bitcoin — either through a qualified custodian (Fidelity Digital Assets, Coinbase Custody, etc.) or through direct key management with hardware wallets and multi-sig arrangements
- Make hold/sell decisions: Trust documents should specify investment standards for volatile assets; prudent investor standards require the trustee to consider whether continuing to hold concentrated Bitcoin positions meets their fiduciary duty
- Handle distributions: If beneficiaries receive Bitcoin distributions in-kind, the trustee must be able to execute Bitcoin transfers; if distributions are in dollars, the trustee must be able to sell Bitcoin and distribute cash
- Tax reporting: The trust requires annual Form 1041 income tax returns; Bitcoin transactions within the trust generate capital gains that must be tracked and reported
Individual Trustee vs. Corporate Trustee
For Bitcoin bypass trusts, the trustee choice deserves careful thought:
| Trustee Type | Advantages | Disadvantages |
|---|---|---|
| Family member (individual) | Low cost, family knowledge, flexible | Fiduciary liability exposure, may lack Bitcoin expertise, mortality risk |
| Close friend / advisor | Trust, flexibility, personal knowledge of family | Same fiduciary exposure, not professionally equipped for complex estates |
| Traditional corporate trustee (bank/trust co.) | Professionalism, continuity, legal expertise | Often uncomfortable with Bitcoin, may not custody digital assets, high fees |
| Digital-asset-forward trust company | Understands Bitcoin, can custody digital assets, professional continuity | Higher fees, fewer options, newer firms with shorter track records |
| Co-trustee structure | Combine family knowledge with professional oversight | Requires coordination, potential for disagreement |
The Prudent Investor Standard and Bitcoin
Trustees are bound by the prudent investor standard — they must manage trust assets as a prudent person would, considering risk, return, and the purposes of the trust. For a bypass trust concentrated in Bitcoin, the trustee must carefully document their reasoning for maintaining a concentrated position. This means having a written investment policy — a core element of sound bitcoin family office governance — that acknowledges Bitcoin's volatility, the rationale for holding it (long-term appreciation potential, inflation hedge characteristics, trust's long time horizon), and the distribution and liquidity strategy.
Bypass Trust vs. Portability Election: The Direct Comparison
The choice between a bypass trust and the portability election is the central strategic decision for married Bitcoin holders. Both tools use the first spouse's estate tax exemption — but they work completely differently and produce different outcomes.
| Feature | Bypass Trust | Portability Election |
|---|---|---|
| Shelters future appreciation | ✓ Yes — all appreciation inside trust is out of both estates | ✗ No — DSUE is a fixed dollar amount; appreciation in surviving spouse's estate is fully taxable |
| Step-up at second death | ✗ No — trust assets don't get a second step-up | ✓ Yes — surviving spouse's assets get a full step-up |
| Remarriage risk | ✓ Immune — assets are already out of surviving spouse's estate | ✗ Vulnerable — DSUE erased if surviving spouse remarries and new spouse dies first |
| Creditor protection | ✓ Can be structured for strong creditor protection | ✗ None — assets held by surviving spouse are exposed to creditors |
| Surviving spouse's access | Limited to trust terms (income, principal for health/education/support) | Full — surviving spouse owns assets outright |
| Administration burden | Ongoing — annual trust returns, trustee duties | Low — just file Form 706 once |
| Upfront cost | $5,000–$20,000+ for trust drafting | $1,500–$5,000 for Form 706 preparation |
| Best for | Large Bitcoin holdings, long time horizons, taxable estate certainty | Smaller estates, maximum flexibility, basis optimization priority |
For Bitcoin families with substantial holdings and a long-term view, the bypass trust generally wins on the math — because the appreciation shelter dominates the step-up advantage over time. But every situation is different, and the right choice depends on specific numbers, estate size, ages, and goals.
Bypass Trust vs. Dynasty Trust: What's the Difference?
The bypass trust and the dynasty trust are related — a dynasty trust is essentially a bypass trust extended for multiple generations. Understanding the distinction helps families choose the right tool for their time horizon and objectives.
Bypass Trust
A bypass trust is typically designed to last the surviving spouse's lifetime. At the second death, the trust terminates and distributes assets to children or other named beneficiaries. The trust shelters one generation of estate tax — it removes the first spouse's assets from the second spouse's estate, but the assets are fully included in the children's estates when they eventually die.
Dynasty Trust
A dynasty trust is structured to continue for multiple generations — potentially in perpetuity in states that have abolished the rule against perpetuities (South Dakota, Nevada, Alaska, etc.). Assets in a dynasty trust are never included in any beneficiary's taxable estate, regardless of how many generations pass. The estate tax shelter is permanent across the entire family line.
Bypass trust: Best when the primary goal is sheltering wealth from estate tax at the second death while providing meaningful benefit to the surviving spouse. Simpler administration, terminates on a defined schedule, children receive assets outright eventually.
Dynasty trust: Best when the goal is complete guide to Bitcoin wealth transfer wealth preservation across three or more generations. Bitcoin's appreciation potential makes dynasty trusts extraordinarily powerful — but they require giving up control for a very long time and require choosing the right trust situs state.
Many Bitcoin families use a hybrid approach: a bypass trust for the surviving spouse's lifetime with provisions that allow the trustee to extend the trust or convert it to a dynasty-like structure if estate tax exposure remains at the second death. This flexibility requires careful drafting but provides options that neither structure alone provides.
Bitcoin Appreciation Inside the Bypass Trust: The Estate Tax Math
The most compelling argument for funding a bypass trust with Bitcoin is the appreciation math. Let's work through concrete scenarios to illustrate the potential estate tax savings.
Scenario: Married Couple, Age 55, $5M Bitcoin
Assume a married couple holds 50 BTC valued at $5M at the time of the first spouse's death. The surviving spouse is 55 and may live another 25–30 years. Assume the applicable exemption at the first death is $X per person (we use $X to represent the current law without predicting specific amounts, given legislative uncertainty).
If the bypass trust is funded with $X of Bitcoin at the first death, all appreciation above $X on that Bitcoin occurs completely outside the taxable estate system. The surviving spouse's estate at death may be significantly smaller — even if Bitcoin's total value has multiplied many times — because the portion in the bypass trust is permanently sheltered.
These are illustrative numbers — not a prediction of Bitcoin's price. The point is the structure: the percentage of estate tax saved scales directly with Bitcoin's appreciation inside the trust. A traditional asset with 5% annual growth produces modest savings. An asset with Bitcoin's historical appreciation trajectory produces dramatically more.
The Multiplier Effect of Early Planning
The earlier the bypass trust is funded, the more appreciation it shelters. A bypass trust funded with Bitcoin when both spouses are young captures decades of potential appreciation outside the taxable estate. Waiting until the first spouse's health declines may still work, but procrastination compresses the window for tax-free appreciation.
Step-Up Basis: What You Lose With a Bypass Trust
The bypass trust's Achilles' heel is the basis story. Understanding this trade-off is essential for making an informed decision.
The Step-Up at Each Death
Under current law, assets included in a decedent's gross estate receive a step-up in cost basis to fair market value on the date of death. This step-up eliminates embedded capital gains accumulated during the decedent's lifetime. It is one of the most valuable features of the U.S. tax code for holders of appreciated assets.
Bitcoin held in the bypass trust is included in the first spouse's estate — it steps up at the first death. This is good. But at the second death, the bypass trust's Bitcoin is not included in the surviving spouse's estate — so it receives no second step-up.
If Bitcoin appreciates significantly between the two deaths, the heirs inherit the bypass trust's Bitcoin with a basis equal to its value at the first death. All appreciation from that first-death value to the eventual sale price is subject to capital gains tax when the heirs sell. There is no step-up to wipe that out.
How to Weigh the Trade-Off
The question is always: what's worse — estate tax at 40% on the full value, or capital gains tax (up to ~23.8%) on the appreciation?
For large, clearly taxable estates, estate tax is worse. Fund the bypass trust with Bitcoin and accept the capital gains exposure — you're trading 23.8% capital gains for 40% estate tax avoidance. That's a positive exchange.
For estates near or under the exemption threshold, the calculus is less clear. There may not be estate tax exposure at all. In that case, losing the step-up basis in a bypass trust costs capital gains with no estate tax benefit in exchange. Portability — which preserves the step-up — may be superior.
Some families use a technique called "swapping" assets with a bypass trust: if the trust document grants a grantor-trust power (specifically, the power to reacquire trust assets by substituting assets of equivalent value), the grantor can swap the highly-appreciated Bitcoin out of the trust for cash of equal value during their lifetime. The Bitcoin returns to the surviving spouse's estate, where it will receive a step-up at death. The trust now holds cash instead. This is a legitimate planning technique but requires careful drafting and execution.
Community Property States: Bypass Trust Complications
Bypass trusts work differently in community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Bitcoin family office in Texas, Washington, Wisconsin, and opt-in Alaska). The double step-up in basis available in community property states creates a tension with the bypass Bitcoin Trust Type Selector tool that requires careful analysis.
The Double Step-Up Advantage
In community property states, both halves of community property receive a step-up in basis at the first spouse's death. This is unique to community property law — in common-law states, only the deceased spouse's half steps up. For Bitcoin with large embedded gains, this double step-up can eliminate enormous capital gains tax exposure entirely.
If community property Bitcoin steps up to full fair market value at the first death, the heirs inherit it with a basis equal to that value regardless of what happens with a bypass trust. The capital gains concern that makes bypass trusts less attractive in some scenarios is substantially reduced.
Community Property and Bypass Trust Funding
In community property states, only the deceased spouse's half of community property is included in their estate and can be directed to the bypass trust. The surviving spouse already owns their half outright — it goes nowhere near the bypass trust. This limits how much Bitcoin can be sheltered in the trust at the first death.
If the couple holds 20 BTC as community property, only 10 BTC (the deceased spouse's half) can be directed to the bypass trust. The other 10 BTC stays with the surviving spouse. This halves the potential appreciation shelter compared to a common-law state couple with the same holdings.
Community Property Planning Solutions
Some couples in community property states use prenuptial agreements or postnuptial agreements to characterize specific assets (including Bitcoin) as separate property rather than community property. Separate property is fully owned by one spouse and can be fully directed to the bypass trust. This requires careful legal work and a clear understanding of each state's specific rules. Not every asset is eligible for such characterization, and the timing of such agreements matters.
Additionally, some community property states offer a "community property agreement" that can give all community property a double step-up while also allowing specific assets to be characterized separately. Estate attorneys familiar with your specific state's law are essential.
How to Structure Trustee Authority Over Volatile Bitcoin
The trust document is where theory meets operational reality. For a bypass trust holding Bitcoin, the trustee powers section requires special attention. Standard boilerplate trust language — drafted for traditional financial assets — is inadequate for Bitcoin.
Essential Trustee Powers for Bitcoin
The bypass trust document should explicitly grant the trustee authority to:
- Hold digital assets: Explicitly authorize holding Bitcoin and other digital assets — some older trust documents don't contemplate non-traditional assets
- Use qualified custodians: Authorize the trustee to engage regulated digital asset custodians (listing specific types, not specific companies)
- Execute transactions: Authority to buy, sell, exchange, or otherwise dispose of Bitcoin
- Hold private keys: If the trust holds Bitcoin directly (not through a custodian), authority to hold and manage cryptographic keys, with clear succession protocols
- Multi-signature arrangements: Explicit authority to use multi-signature custody structures, including designating co-signers and managing key recovery
- Distribute in kind: Authority to distribute Bitcoin directly to beneficiaries without first converting to cash
Investment Policy for Volatile Assets
The trustee's prudent investor obligations require a documented approach to Bitcoin's volatility. The trust document can — and should — provide guidance. Specific provisions might include:
- Authorization to maintain a concentrated Bitcoin position (overriding default diversification requirements) given the trust's specific investment purpose
- A Bitcoin Bitcoin allocation strategies for HNW investors floor (e.g., "maintain at least X% of trust assets in Bitcoin") that limits the trustee's ability to sell off the trust's core holding
- A rebalancing protocol that specifies when and how Bitcoin can be partially liquidated
- Liquidity provisions ensuring the trust can fund distributions without forced sales at inopportune times
Successor Trustee Planning
Bitcoin custody and management requires specific competencies. Your first-choice trustee may have them; their successor may not. Trust documents should include clear provisions for how a successor trustee takes over custody, what happens to hardware wallets and keys, and whether the trustee can engage professional custody services if they are unable to manage Bitcoin directly.
When a trustee change occurs, the trust's Bitcoin custody must transfer seamlessly. Build this into the plan: use institutional custodians where the custody relationship is with the trust (not a specific individual), maintain a detailed custody protocol in a secure location referenced by the trust document, and ensure successor trustees are identified and briefed before they are needed. The worst time to figure this out is during a trustee transition under time pressure.
Bitcoin Mining: The Most Powerful Tax Strategy Available
A bypass trust shelters Bitcoin from estate tax. Bitcoin mining can dramatically reduce the income tax you pay on your estate while you're still here. Depreciation deductions, operating expense offsets, and bonus depreciation make mining one of the most effective tax reduction strategies available to high-income Bitcoin holders.
Explore the Mining Tax Strategy →FAQ: 8 Questions Married Bitcoin Holders Ask About Bypass Trusts
Yes, but with limitations. Bypass trusts typically allow distributions to the surviving spouse for health, education, maintenance, and support (HEMS standard). The surviving spouse can be a beneficiary — they just can't have unlimited control over the trust, or it will be included in their estate. The trustee makes distribution decisions based on the trust terms. Some bypass trusts also give the surviving spouse a limited power of appointment, allowing them to redirect trust assets at their death among a defined class of beneficiaries.
If Bitcoin's value declines after funding the bypass trust, the trust holds assets worth less than the exemption that was "used" to shelter them. This is an inefficient use of the exemption in hindsight — you could have sheltered more, or chosen a different asset. However, no actual harm is done. The trust's assets may recover, and the structure remains intact. For this reason, some planners recommend diversifying bypass trust assets rather than concentrating entirely in Bitcoin — though the appreciation shelter argument goes the other way. The right approach depends on your specific circumstances and risk tolerance.
Yes. A bypass trust is a separate taxpayer and files an annual Form 1041 (U.S. Income Tax Return for Estates and Trusts). Any income generated by trust assets — including capital gains from Bitcoin sales — is reported on this return. If the trust distributes income to beneficiaries, they receive a K-1 and report their share on their personal returns. Bitcoin transactions within the trust must be tracked carefully for tax reporting. This is one of the administrative burdens that makes the bypass trust more complex to maintain than a simple portability election.
The traditional bypass trust is created at death via the first spouse's will or revocable living trust. However, some families use intervivos irrevocable trusts — trusts created during both spouses' lifetimes — to shelter assets now. A spousal lifetime access trust (SLAT) is one such structure, allowing the non-grantor spouse to access the trust while the grantor spouse removes the assets from their estate. SLATs and bypass trusts serve related but distinct functions. Work with an estate attorney to determine which structure fits your situation.
Twelve states and the District of Columbia have separate state estate taxes, often with lower exemptions than the federal threshold. Massachusetts, for example, historically taxed estates over $1M. If you live in a state with an estate tax, your bypass trust may shelter assets from both federal and state estate tax — doubling the planning benefit. Conversely, some states don't recognize the federal DSUE, making bypass trusts more important for residents of those states (portability's value is limited if your state ignores it). Check your state's specific estate tax rules with a local estate attorney.
Yes — a bypass trust can hold spot Bitcoin ETF shares (like IBIT, FBTC, etc.) just as it can hold any publicly traded securities. The estate tax shelter mechanics are identical. The trade-offs: ETF shares are easier to custody and transfer, carry lower operational risk, but also charge ongoing fees. Direct Bitcoin in the trust provides full self-custody benefits and no management fee drag — but requires technical competence. For families who prefer ETF exposure, a bypass trust holding Bitcoin ETF shares is a workable and simpler alternative.
At the surviving spouse's death, the bypass trust continues or terminates based on its terms. Most bypass trusts distribute assets to children or other named beneficiaries at the surviving spouse's death. Those beneficiaries receive the Bitcoin (or its cash equivalent) without the bypass trust assets being included in the survivor's taxable estate. The heirs receive the Bitcoin with a cost basis ed at the first death — no second step-up. From that point, if they hold the Bitcoin and it appreciates further, they'll have capital gains when they eventually sell.
If your combined estate is currently below the applicable exemption threshold, you don't face immediate estate tax exposure — and a bypass trust's primary benefit isn't relevant today. However, if you hold significant Bitcoin and expect it to appreciate substantially, you may have a taxable estate in the future. Planning now, when legal costs are lower and the structure can be set up thoughtfully, is almost always better than planning under time pressure after a spouse's health declines. At a Bitcoin family office minimum requirements, ensure your wills include bypass trust provisions that activate only if the estate exceeds the available exemption at death.
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