What is the federal estate-tax exemption — and what happened to the 2026 sunset?

The "use it or lose it" scramble that never hit the cliff

Through 2024 and early 2025, estate planners told high-net-worth clients the same story: the doubled federal exemption from the 2017 tax law was temporary. If Congress did nothing, the basic exclusion amount was scheduled to drop sharply after December 31, 2025 — roughly cutting the shelter in half for many families. That prospect drove years of "use it or lose it" gifting, SLATs, and other transfers meant to lock in today's higher amount before the cliff.

Congress did act. Public Law 119-21, signed July 4, 2025, amended IRC § 2010(c)(3) and raised the basic exclusion amount to $15,000,000 for calendar year 2026. The IRS now publishes that figure for estates of decedents who die in 2026 and for gifts in 2026. The half-cut sunset that dominated planning conversations did not land. What remains is a clearer — but still important — number, plus the ordinary risks every family still faces: state transfer taxes, future legislation, and portability elections that get skipped.

What the "federal estate-tax exemption" actually is

In IRS language, the figure most people call the "estate-tax exemption" is the basic exclusion amount under IRC § 2010. It is the portion of your taxable transfers — during life and at death — that is sheltered by the unified credit before federal estate or gift tax applies at rates that top out at 40%.

It is not a separate pot of cash, and it is not limited to wills. Lifetime taxable gifts reduce the amount left to shelter your estate. Generation-skipping transfer (GST) tax uses a matching lifetime GST exemption equal to the same basic exclusion amount for the year — $15,000,000 for calendar year 2026.

The IRS estate-tax page describes the mechanics: start with the gross estate (fair market value of everything you own or have certain interests in at death), subtract allowed deductions to reach the taxable estate, add back adjusted taxable gifts, compute the tax, then reduce it by the available unified credit tied to that year's basic exclusion amount.

The TCJA doubling — and the sunset that was scheduled

Before 2018, the basic exclusion amount sat near $5.5 million per person (for example, $5,490,000 for deaths in 2017). The Tax Cuts and Jobs Act of 2017 temporarily roughly doubled the statutory baseline and indexed it for inflation. The IRS historical table shows the jump: $11,180,000 for 2018, rising to $13,990,000 for 2025.

That temporary increase was always written with an expiration. Absent new legislation, the higher TCJA amount was scheduled to unwind after 2025, returning planning to a lower inflation-adjusted baseline — the famous "2026 sunset." Families near or above that lower band treated late 2025 as a hard deadline to move assets out of their estates while the higher exclusion still applied.

Understanding the sunset still matters even though it was averted: many existing trusts, gift-tax returns, and client memos were drafted against a cliff that no longer exists. Review those instruments for assumptions that no longer match current law — not because the documents are automatically wrong, but because the urgency and sizing of some strategies may have changed.

What Public Law 119-21 changed for 2026

The IRS What's New page for estate and gift tax states that Public Law 119-21 (also referred to in IRS materials as Working Families Tax Cuts / the One, Big, Beautiful Bill) was signed July 4, 2025 and amends § 2010(c)(3) by increasing the basic exclusion amount to $15,000,000 for calendar year 2026. The IRS news release on 2026 inflation adjustments (IR-2025-103) confirms the same figure for estates of decedents who die during 2026, up from $13,990,000 for 2025.

In practical terms for 2026: one person can shelter $15 million of combined taxable lifetime gifts and transfers at death; a married couple can shelter up to $30 million if both spouses' exclusions are fully available — including through a valid portability election. The IRS FAQ on large gifts made before 2026 points readers to the same statutory amendment for how the 2026 amount applies going forward.

There is no longer a scheduled automatic half-cut of the kind that defined the TCJA sunset narrative. That does not mean the number is politically immortal: a future Congress can amend § 2010 again. It does mean the specific 2026 cliff planners spent years preparing for is not the law that took effect.

How the unified exclusion works day to day

Think of one lifetime meter shared by gift tax and estate tax. Annual-exclusion gifts — $19,000 per recipient in 2026 per the IRS What's New table — do not use the meter. Direct payments of tuition to an educational organization or medical expenses to a provider, and unlimited transfers to a U.S.-citizen spouse, also sit outside the lifetime exclusion when they qualify under the Code.

Larger gifts generally require Form 709. Often no gift tax is due; instead, the gift reduces remaining exclusion that would otherwise shelter your estate. At death, the executor compares the filing threshold for the year of death against the gross estate plus adjusted taxable gifts. For 2026 that threshold is $15,000,000 — the same number as the basic exclusion amount in the IRS table.

For a shorter overview of annual exclusion, state-level taxes, and the gift categories that never count, see our Estate & Gift Taxes in 2026 guide. This article focuses on the exemption itself and the sunset story.

Portability: the election that still gets missed

When the first spouse dies, unused basic exclusion can pass to the survivor as deceased spousal unused exclusion (DSUE) — but only if the estate elects portability on a timely filed Form 706. The IRS FAQ is explicit: a return must be filed to transfer DSUE even when the estate is otherwise under the filing threshold and no tax is due.

The due date is generally nine months after death, with an automatic six-month extension available via Form 4768. Missing that window can permanently forfeit DSUE for estates that had a filing requirement; estates under the threshold may have limited relief paths (for example, procedures described in Rev. Proc. 2022-32), but those are technical and time-bounded — not a reason to skip the election casually.

For couples whose combined net worth could ever approach $15–30 million — including home equity, retirement accounts, life insurance, and business interests — portability is often the highest-ROI piece of paper in the estate. Tell your executor the election may matter even if "we're under the exemption."

What still requires attention without a 2026 cliff

State estate and inheritance taxes. Many states impose their own transfer taxes with exemptions far below the federal $15 million figure. Living under the federal threshold is not the same as living under your state's.

Illiquid wealth and concentration. A $15 million exclusion does not help if the estate owes tax (federal or state) and the only asset is a private business or a single property. Liquidity planning — insurance, buy-sell agreements, installment options — still belongs in the conversation for concentrated estates.

Future law changes. Permanence in today's Code is not a promise. Revisit large irrevocable gifts and formula clauses that assumed a 2026 drop; confirm they still match your intent under a higher, indexed exclusion.

Basis, beneficiaries, and titling. The exemption answers a transfer-tax question. It does not fix outdated beneficiary forms, jointly titled accounts that conflict with the will, or assets left outside a trust you thought was funded. Those failures show up in probate and family conflict long before Form 706 does.

Questions worth deciding with your advisors

Are we actually near the federal meter — or only near a state threshold? Run a rough inventory at fair market value, including life insurance owned by you and retirement accounts, before redesigning the plan around federal estate tax.

If we already made large "sunset" gifts, do those trusts and valuations still do the job we wanted, or should we stop further transfers and focus on portability, income tax basis, and state exposure?

Who will file Form 706 if the first spouse dies — and do they know portability may be required even when no tax is due?

Educational only: this is not tax, legal, or investment advice. Exemption amounts, filing thresholds, and elections change; confirm current-year figures on IRS.gov and with a qualified tax professional before acting.

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