The One Big Beautiful Bill Act made the federal estate tax exemption permanent at $15 million per person and $30 million per couple. It did not create generation-skipping transfer tax exemption portability, because that has never existed. If the first spouse dies without allocating their GST exemption, it is permanently gone — no amended return, no election, no technique recreates it. The surviving spouse is left with their own against everything the family owns.
The OBBBA removed one deadline. It did not remove this one.
Key Points
- The estate tax exemption is portable. The GST exemption is not. There is no DSUE equivalent.
- The deadline is the first death, and nobody controls when that is.
- A higher exemption makes the gap more invisible, not less. Couples feel safer; the mechanics did not change.
- The cost is compounding, not a single event — exemption allocated at the first death moves assets out of the survivor’s estate for the rest of her life.
- Allocation happens on a return, not in the trust document.
- State estate tax thresholds are frequently far below federal, and arrive long before federal exposure does.
What the OBBBA Actually Did
When the One Big Beautiful Bill Act was signed into law on July 4, 2025, a lot of successful couples exhaled.
The federal estate tax exemption was made permanent at $15 million per person — $30 million for a married couple, indexed for inflation going forward. The sunset that had kept estate planning attorneys busy for years was dead. No more artificial deadline. No more scrambling to make large gifts before December 31st.
For a lot of people, that felt like the problem was solved.
It wasn’t.
The OBBBA made the elevated exemption permanent and removed the threat of reversion to roughly $7 million that had loomed since 2017.
What it did not change is how the generation-skipping transfer tax exemption works between spouses. That distinction matters more than most people realize.
The Problem the OBBBA Left Untouched
Portability exists for the estate tax. It does not exist for the GST tax. That asymmetry is the entire gap, and no version of the OBBBA touched it.
Most people know that when one spouse dies, the surviving spouse can inherit the deceased spouse’s unused estate tax exemption. That is portability — the DSUE, or Deceased Spousal Unused Exclusion, under IRC §2010(c). It has been the law since 2010 and it survived the OBBBA unchanged.
What most people do not know — and what most CPAs miss — is that GST exemption portability does not exist.
The generation-skipping transfer tax is the 40% federal tax that applies when wealth passes not just to your children but to your grandchildren or beyond. Congress created the GST exemption to let a meaningful amount of wealth transfer across multiple generations without triggering that hit at every level.
Each spouse has their own — $15 million each under current law.
And when one spouse dies without having allocated theirs, it disappears. Permanently. It does not carry over to the surviving spouse. It is not absorbed into the DSUE calculation. It is simply gone, and no amount of planning after the fact brings it back.
The OBBBA made this problem more invisible, not less. A higher exemption makes couples feel safer. It does not change the underlying mechanics.
The $12 Million Couple Who Thinks They’re Fine
Consider a married couple — a successful physician or business owner, 72 years old, with a wife eight years younger at 64. Together they have built a $12 million estate. Real estate, investment accounts, practice equity, retirement assets. By any measure they have done everything right.
They look at the $30 million combined threshold and conclude the dynasty planning conversation is not for them.
That is a reasonable instinct. It is also wrong — not because of where they are today, but because of where they will be.
At a conservative 6% annual growth rate, that $12 million estate reaches $25.6 million in 13 years.
The survivorship reality nobody accounts for
A healthy 72-year-old man today has a statistical life expectancy into his mid-eighties. If he dies at 85, his wife is 77. Women at 77 have a life expectancy of another 12 to 14 years. She realistically survives to 89 or 90.
Which means the estate continues compounding inside her taxable estate for over a decade after he is gone.
At his death, the estate is $25.6 million. Growing at 6% for the 13 years she survives him, it reaches approximately $54.6 million by the time she passes.
Where the GST Gap Becomes a Dollar Figure
And it is worth being precise about the mechanism, because it is not the one most articles describe.
At her death, estate tax comes first. She has her own $15 million exemption, and the estate tax exemption is portable — his unused amount transferred to her through the DSUE election. That gives her $30 million of estate tax shelter against a $54.6 million estate, leaving roughly $24.6 million taxable at 40%, or about $9.8 million in estate tax.
The GST exemption is where the real loss lands, and it compounds.
Had his $15 million of GST exemption been allocated at his death into a dynasty structure, that $15 million would have moved out of her taxable estate immediately and grown outside it for the thirteen years she survived him.
At 6%, $15 million becomes roughly $32 million. None of it in her estate at her death. All of it exempt from generation-skipping tax at every transfer after that.
Unallocated, that $32 million sits inside her taxable estate — exposed to estate tax at her death, and the portion that eventually reaches grandchildren exposed to a second 40% layer when it gets there.
The two paths, side by side
Path A — nothing allocated at his death. The full $54.6 million sits in her estate. Estate tax takes roughly $9.8 million. Her own $15 million of GST exemption shelters part of what remains from the generation-skipping layer. Everything above that faces a second 40% when it reaches grandchildren.
Path B — his exemption allocated at his death. Roughly $15 million funds a dynasty structure, grows to about $32 million outside her estate, and passes to grandchildren free of both estate tax and generation-skipping tax. The remainder in her estate falls under her own exemption. Estate tax at her death approaches zero, and the dynasty portion is permanently exempt.
The difference is measured in eight figures, and the entire divergence traces to a filing that either happened at his death or did not.
None of it recoverable once he is gone.
The Window That Closes at the First Death
This is the part that creates urgency — not artificially, but mechanically.
Once the first spouse dies, half the combined GST exemption is gone if it has not been allocated. There is no corrective action. No amended return. No planning technique that recreates the exemption the surviving spouse lost.
The couple with $12 million today, growing at 6%, with an eight-year age gap between them, is operating on a clock they may not realize is running.
Every year of delay is another year of appreciation compounding inside the estate instead of outside it — and another year closer to the moment when half the planning opportunity permanently closes.
The OBBBA removed one deadline. It did not remove this one.
And Check Your State Separately
The federal exemption covers most families. State estate taxes frequently do not.
Oregon’s threshold is $1 million. Washington, Massachusetts, New York, Illinois, Minnesota, and others impose their own tax at levels well below the federal amount. A family in Oregon at $12 million has a state estate tax problem a family in Nevada at the same level does not.
And exposure follows the assets, not just your residence. A California resident with property in Washington or Oregon acquired a state estate tax question along with the property.
State exposure typically arrives long before federal exposure does — which means the “we’re under $30 million, we’re fine” conclusion can be wrong on the state side while being right on the federal side.
How the Dynasty Bridge Trust™ Addresses This
Without forcing the tradeoff a completed gift requires.
There is no completed gift at funding. Assets remain in the grantor’s gross estate during life — which is what preserves the §1014 step-up and means no lifetime exemption is consumed at a locked-in valuation.
Two independent tax rules operate. The instrument satisfies the court test and control test of Treas. Reg. §301.7701-7 under IRC §7701(a)(30)(E), so the IRS classifies it as domestic. Separately, it maintains grantor-trust status under IRC §§671–677, so income is reported on the grantor’s own return. One rule determines classification; the other determines who reports income.
GST exemption is allocated at death, on Form 706 — and the first death is the deadline that matters. At the first spouse’s death, their exemption is allocated to a dynasty structure receiving assets at that time. Those assets move out of the survivor’s taxable estate and compound outside it, GST-exempt, for the rest of her life.
That is the step most plans miss. The trust instrument creates the vessel. The allocation on the return is what makes it work — which is why this is a coordination question between counsel and the family’s CPA rather than a drafting question alone.
The protection layer
The trust agreement is governed by Nevada law and registered offshore from inception, in both Belize and the Cook Islands. The Belize registration starts the offshore limitation period at day one; the Cook Islands recognizes the trust as of that original filing date and supplies the pre-committed successor trustee.
If a credible threat arises, an independent Trust Protector — an attorney exercising professional judgment, not the client — may declare an Event of Duress. Nothing fires automatically. A licensed offshore trustee that honored a foreign court order lacking local jurisdiction would face personal liability and loss of license.
Beneath the trust sits the Asset Management Limited Partnership holding real estate and business interests. Under A.R.S. §29-341, the charging order is the exclusive remedy against a limited partner’s interest, and the section contains no foreclosure provision.
For a couple with rental properties in multiple states, a practice with exposure, and no protective structure in place, that addresses three problems at once: probate, creditor exposure, and generational tax efficiency.
What a Revocable Trust Does Not Do
A basic revocable living trust solves probate. That is real and worth having.
It does not allocate GST exemption. It does not provide creditor protection during your lifetime — because you can revoke it, and a court can order that power exercised. And it does nothing about the exemption that disappears when the first spouse dies without a dynasty structure to allocate it to.
Most couples in this range have one and believe the planning is done. The probate piece is. The other two are not.
FAQs
Did the OBBBA fix the estate tax problem? It made the exemption permanent at $15 million per person, removing the sunset deadline. It did not change portability under IRC §2010(c), and it did not create GST exemption portability — which has never existed.
Is the GST exemption portable between spouses? No. The estate tax exemption is portable through the DSUE election. There is no equivalent for GST. Unallocated at the first death, that exemption is permanently lost.
What exactly is the deadline? The first spouse’s death. After that, no return, election, or planning technique recreates their GST exemption.
We have $12 million and the exemption is $30 million. Aren’t we fine? On today’s balance sheet, for federal estate tax, probably. The questions are what the estate is worth when it actually transfers, and whether you are in a state with its own estate tax — state thresholds are frequently far below the federal level.
Why does the age gap matter? Because the estate keeps compounding inside the surviving spouse’s taxable estate for as long as she survives him. An eight-year gap plus differing life expectancies can mean a decade or more of growth landing in the wrong place.
Does a revocable living trust address this? No. It solves probate. It does not allocate GST exemption and provides no creditor protection during life.
When is GST exemption allocated in a Dynasty Bridge Trust™? At death, on Form 706 — because there is no completed gift during life. The first death is the operative deadline.
Why not just make a completed gift now and allocate exemption during life? That is the SLAT approach, and it costs you two things: the §1014 step-up under Rev. Rul. 2023-2, and the valuation, which locks in at funding whether the asset rises or falls.
What This Means for You
If you and your spouse have built an estate between $8 million and $30 million, the threshold question is the wrong question.
The right question is what your estate looks like in fifteen years — and how much of that wealth survives to your children and grandchildren if nothing is allocated before the first spouse dies.
For most couples in this range, the cost of inaction is measured in seven and eight figures. Not in theory. In the actual dollars that transfer to the IRS on the back end of a problem that was solvable on the front end.
Structure before stress.
📞 For a confidential legal consultation, contact Bradley Legal Corp. at (888) 773-9399, or complete the intake questionnaire at btblegal.com.
By: Brian T. Bradley, Esq. – National Asset Protection Attorney
