Bernard StoneThe Tax Cuts and Jobs Act (TCJA) of 2017 more than doubled the federal estate tax exemption to $13.99 million per person in 2025—but that elevated threshold was designed to expire on December 31, 2025. Congress moved to address the sunset through budget reconciliation legislation in 2025. Regardless of the legislative outcome, understanding the TCJA's mechanics and acting before the rules solidify protects your estate under any scenario.
What the TCJA Did for Estate Planning (2018–2025)
When President Trump signed the Tax Cuts and Jobs Act into law on December 22, 2017, it fundamentally reshaped the federal estate tax landscape. The legislation nearly doubled the unified federal estate and gift tax exemption—from approximately $5.49 million per person in 2017 to $11.18 million per person starting January 1, 2018 [Tax Cuts and Jobs Act, Pub. L. No. 115-97, § 11061 (2017)].
Indexed for inflation each year, the exemption climbed steadily:
| Year | Per-Person Exemption | Married Couple (with portability) |
|---|---|---|
| 2018 | $11.18 million | $22.36 million |
| 2020 | $11.58 million | $23.16 million |
| 2022 | $12.06 million | $24.12 million |
| 2024 | $13.61 million | $27.22 million |
| 2025 | $13.99 million | $27.98 million |
[Source: IRS Revenue Procedures 2018-18 through 2024-40]
The generation-skipping transfer (GST) tax exemption—which governs wealth transfers to grandchildren and more distant descendants—mirrored the estate tax exemption exactly. For married couples filing an estate tax return electing portability, the surviving spouse could inherit the deceased spouse's unused exclusion (DSUE), a strategy that became significantly more powerful under TCJA's elevated amounts. The annual gift tax exclusion, which rose to $19,000 per recipient in 2025, was not part of the TCJA's sunset provisions and remained unaffected.
The TCJA Sunset Provision: What Was Set to Change
The TCJA's estate tax provisions contained an explicit sunset clause. Under Section 11061 of the Act, the doubled exemption was set to expire on December 31, 2025, automatically reverting to pre-2018 levels adjusted for inflation from the 2010 baseline of $5 million.
The projected post-sunset exemption: approximately $7 million per person, or $14 million for a married couple using portability [Tax Policy Center, 2025 analysis]. That figure represents a reduction of nearly 50 percent from the 2025 limit.
For a single person with a $15 million taxable estate, the difference is stark. Under the 2025 TCJA rules, zero federal estate tax. Under post-sunset rules, approximately $8 million falls into the taxable range—generating a federal estate tax bill of up to $3.2 million at the 40 percent top rate.
The Anti-Clawback Rule: Gifts Made Under TCJA Are Protected
One of the most misunderstood aspects of the TCJA sunset concerns gifts already made. Many families worried: if they gifted $10 million during the TCJA window, would the IRS "claw back" that exemption when the threshold dropped?
The Treasury Department resolved this concern definitively. Under Treasury Reg. § 20.2010-1(c), individuals who made gifts between 2018 and 2025 that exceeded the post-sunset exemption amount will not face additional estate tax at death. The IRS locks in the higher exemption for completed gifts.
"The final anti-clawback regulations give taxpayers the certainty they need to act," says an estate planning attorney with the American College of Trust and Estate Counsel (ACTEC). "Gifts made under the elevated TCJA exemption are permanently sheltered—even if the exemption later drops. The window for large lifetime transfers is real, and the protection is explicit in federal regulation."
This anti-clawback protection makes the period leading up to any exemption reduction strategically significant. Irrevocable transfers completed under the TCJA rules are grandfathered in regardless of future legislative changes to the exemption amount.
À retenir: The anti-clawback rule means that acting before a lower exemption takes effect is permanent. Gifts cannot be undone—but neither can their shelter from estate tax.
Who the Estate Tax Changes Actually Affect
The TCJA sunset draws a clear exposure line: households with taxable estates above approximately $7 million per person—or $14 million per couple—face direct federal estate tax risk under post-sunset rules. But the real exposure is often invisible until a full estate inventory is completed.
Consider James and Patricia, a couple in their late 60s in Chicago. Their estate includes a paid-off home worth $2.8 million, an investment portfolio of $6.5 million, defined benefit pension assets, and a 30 percent stake in a family distribution business independently appraised at $12 million. Their combined estate value: approximately $21 million. Under 2025 TCJA rules, portability shelters everything. Under post-sunset rules, roughly $7 million would be taxable—a $2.8 million federal estate tax bill their children would need to fund, potentially forcing a sale of the business interest.
The IRS's aggressive estate valuation approach in high-profile cases illustrates how quickly exposure can compound when asset values are contested at death.
Groups facing meaningful exposure under lower exemptions include:
- Owners of family businesses where enterprise value alone approaches or exceeds the exemption
- Couples in high-cost real estate markets where appreciated property pushes combined net worth past threshold
- Surviving spouses who held a large Deceased Spousal Unused Exclusion (DSUE) based on the prior higher exemption
- Individuals with significant pre-tax retirement assets (401(k), IRA) that will be included in the taxable estate
The roughly 40,000 estates that filed federal estate tax returns annually before the TCJA was enacted are projected to roughly triple in number under post-sunset rules [Joint Committee on Taxation, 2018 revenue estimates].
Proactive Strategies for 2026 and Beyond
Sound estate planning strategies work regardless of the legislative outcome. The following approaches reduce estate tax exposure under both current and post-sunset exemption levels. Working with a qualified CPA and estate attorney before year-end is especially critical given the volume of rule changes arriving simultaneously in 2026.
Spousal Lifetime Access Trusts (SLATs)
A Spousal Lifetime Access Trust (SLAT) allows one spouse to gift assets into an irrevocable trust that benefits the other spouse during their lifetime. The transfer uses the lifetime gift tax exemption—locking in the higher amount while permanently removing those assets from the taxable estate. The anti-clawback protection applies to properly structured SLATs completed before any exemption reduction.
Critical caveat: Both spouses cannot create reciprocal SLATs simultaneously without triggering IRS step-transaction doctrine that collapses both trusts. Proper structure requires staggered timing and differentiated asset classes.
Irrevocable Life Insurance Trusts (ILITs)
An Irrevocable Life Insurance Trust (ILIT) removes life insurance death benefits from the taxable estate. A $5 million policy held inside an ILIT passes estate-tax free to beneficiaries. For high-net-worth families, this provides liquidity at death without forcing the sale of illiquid assets—such as a family business or investment real estate—to pay estate taxes.
Grantor Retained Annuity Trusts (GRATs)
A Grantor Retained Annuity Trust (GRAT) transfers future appreciation out of the taxable estate at minimal gift tax cost. The grantor retains an annuity payment for a set term; any growth exceeding the IRS Section 7520 hurdle rate passes gift-tax free to remainder beneficiaries. GRATs work best in environments where asset appreciation is likely to outpace the hurdle rate.
Annual Exclusion Gifting
The annual exclusion—$19,000 per recipient in 2025—requires no exemption usage and is entirely independent of the TCJA sunset. A couple with three adult children and six grandchildren can transfer $342,000 per year, completely tax-free, through disciplined exclusion gifting alone. Over 10 years, that compounds to $3.42 million removed from the taxable estate.
State Estate Taxes: A Separate Exposure Often Overlooked
Twelve states and the District of Columbia impose their own estate taxes entirely independent of federal law—and the TCJA sunset does not change these state rules. Massachusetts and Oregon apply estate taxes to estates starting at just $1 million, a threshold neither state has indexed for inflation in decades.
States with estate taxes as of 2025: Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, New York, Oregon, Rhode Island, Vermont, Washington, and D.C.
New York's estate tax contains a particularly aggressive "cliff provision": estates that exceed the state exemption by more than 5 percent lose the exemption entirely and pay tax on the full estate value, not just the excess [New York Tax Law § 952]. New York's exemption for 2025 is $6.94 million—meaning even families well under the federal TCJA threshold may face meaningful New York estate tax.
Multi-state planning—for families with real estate in high-tax states or business interests in multiple jurisdictions—requires a coordinated analysis of both federal and state exposure simultaneously.
Reviewing Estate Documents in 2026: The Non-Tax Essentials
Even families below the estate tax threshold benefit from a thorough estate plan review. A will drafted in 2012—before the TCJA, before the SECURE Act 2.0, before significant market appreciation—likely contains funding formulas that are now mathematically misaligned with current asset values. Formula clauses that divide assets "up to the maximum estate tax exemption" can produce unintended distributions if the threshold shifts.
Retirement account beneficiary designations deserve immediate attention. Inherited IRAs now carry strict 10-year distribution requirements under the SECURE Act 2.0, and failing to update outdated designations—especially those naming a revocable trust as beneficiary—can force accelerated taxable distributions and eliminate stretch IRA strategies entirely.
2026 estate document review checklist:
- Revocable living trust: verify funding formulas and successor trustee succession provisions
- Pour-over will: confirm it aligns with the current trust structure and asset projections
- Durable power of attorney: healthcare and financial instruments; review agent designations for relevance
- Beneficiary designations: retirement accounts and life insurance supersede the will entirely—review annually
- Business succession agreements: confirm buy-sell provisions, valuation methodology, and funding mechanisms are current
Frequently Asked Questions
Will gifts made during 2018–2025 be subject to estate tax if the exemption drops?
No. Treasury Reg. § 20.2010-1(c) provides explicit anti-clawback protection. Gifts made under the elevated TCJA exemption will not be recaptured in your taxable estate at death, even if the exemption amount is lower at that time. This protection was confirmed by IRS final regulations in 2019 and remains definitive federal guidance.
Does the annual gift tax exclusion change with the TCJA sunset?
No. The annual exclusion ($19,000 per recipient in 2025) is indexed separately for inflation under IRC § 2503(b) and is entirely unrelated to the TCJA's sunset provisions. It continues regardless of what happens to the lifetime exemption.
Can a surviving spouse still use portability after the exemption drops?
Yes. Portability—the ability to transfer a deceased spouse's unused exclusion (DSUE) to the surviving spouse—continues post-sunset. However, the underlying exemption available for transfer reflects the lower post-sunset amount unless the first spouse's death occurred while the higher TCJA limits were in effect.
How does the TCJA sunset affect generation-skipping trusts?
The Generation-Skipping Transfer (GST) tax exemption mirrors the unified credit exemption and will decline in parallel with the estate and gift tax exemption. Dynasty trusts funded before the sunset date lock in the higher exemption amount for multi-generational transfers, making early funding particularly valuable.
When should I consult an estate planning attorney about these changes?
Immediately, if your estate—including retirement accounts, life insurance, real estate, and business interests—approaches or exceeds $7 million per person. Estate planning strategies, particularly irrevocable trusts, typically require 6–12 months to implement correctly. Waiting for complete legislative certainty may eliminate the ability to act within the optimal planning window.
Disclaimer: The information on this page is provided for informational purposes only and does not constitute legal, tax, or financial advice. Estate and tax laws are complex, change frequently, and vary by individual circumstance. Consult a qualified estate planning attorney and tax professional for advice specific to your situation.
