Federal Estate Tax 2026: Exemption and Rate Data

The number that defined estate planning for the past eight years just changed, and almost every plan drafted before July 2025 is now calibrated to a threat that no longer exists. For 2026, the federal estate tax exemption is $15,000,000 per individual and $30,000,000 for a married couple, per the IRS inflation adjustments released in Revenue Procedure 2025-32 and the underlying statute. The cliff that planners spent two years preparing for — a January 1, 2026 reversion to roughly $7,000,000 — was eliminated weeks before it would have mattered.

This article quantifies what the current regime actually costs estates in the $5M–$25M range, the data the headline exemption number obscures, and the new expiration date most coverage has not yet absorbed.

The Featured Numbers

Source: IRS Revenue Procedure 2025-32 and IRS estate and gift tax inflation adjustments, October 2025; One Big Beautiful Bill Act, Public Law 119-21, enacted July 4, 2025.

How the 40% Rate Actually Applies

The exemption is not a deduction against a graduated schedule. Above the available exemption, the federal estate tax is a flat 40% on every dollar, under IRC §2001(c). The Haynes Boone analysis of the legislation describes it bluntly: because the exemption is so large, the estate tax now functions as a flat tax on the overage rather than a progressive structure (Haynes Boone, July 2025).

Consider an unmarried decedent with a $20,000,000 taxable estate and the full $15,000,000 exemption available. The $5,000,000 excess produces $2,000,000 in federal estate tax. Nothing below the exemption is taxed; nothing above it escapes the 40% rate. That arithmetic is the entire federal calculation, before state taxes and before any planning. The mechanics reward two things: keeping the taxable estate below the threshold, and removing future appreciation from the estate before it accrues — which is where lifetime annual gifting strategy and irrevocable trusts enter the picture.

What the exemption replaced

The $15,000,000 figure is now the statutory basic exclusion amount under IRC §2010(c)(3), permanently replacing the pre-2018 $5,000,000 base. Before OBBBA, that base was scheduled to return on January 1, 2026, inflation-adjusted to roughly $7,000,000 per person. The Tax Cuts and Jobs Act had doubled the base only through 2025. Pierce Atwood notes the new $15M amount formally supersedes the old $5M figure in the Code itself (Pierce Atwood, August 2025). The practical effect for a $5M–$25M estate is dramatic: a married couple worth $14,000,000 faced a potential taxable estate of roughly zero under 2025 law, a $0 estate under 2026 law, and would have faced exposure on the amount above a combined ~$14,000,000 had the sunset hit. The sunset did not hit.

Finluxy Estate Tax Exposure Index

The Finluxy Estate Tax Exposure Index estimates federal estate tax owed if death occurred under current 2026 law versus the scenario most planning documents were built around. Because the OBBBA eliminated the 2026 sunset, the relevant downside comparison is no longer a 2026 cliff — it is the new sunset scheduled for December 31, 2034, when the exemption is projected to fall back toward $7,000,000–$8,500,000 per person absent further legislation (Reed Corporation CPA, June 2026). The Index below uses a conservative post-2034 figure of $7,000,000 per person ($14,000,000 married) to bound the risk; the actual post-2034 amount depends on inflation and future Congressional action.

Calculation: (taxable estate − available exemption) × 40%, per IRC §2001(c). Current-law exemption $15M single / $30M married (IRS, 2026). Post-2034 scenario uses an illustrative $7M single / $14M married to bound downside risk; actual post-2034 exemption is not yet determined. Married scenarios assume full portability election. Figures exclude state estate taxes.

The Index makes the structural shift visible. Under 2026 law, a married couple worth $25,000,000 owes nothing federally — their combined $30,000,000 exemption covers the estate entirely. The same couple faces a $4,400,000 bill if the 2034 sunset arrives and they have done no planning. For the single filer at $20,000,000, exposure exists today — $2,000,000 — and roughly triples post-sunset. The gap between the two columns is the value of the planning window, and it is wider for single filers than for married couples who can stack two exemptions through portability.

Portability: The Second Exemption That Isn’t Automatic

Portability lets a surviving spouse claim the deceased spouse’s unused exemption, which is how a married couple reaches the combined $30,000,000 figure. It is not automatic. Fidelity’s guidance is explicit that the executor must file IRS Form 706 — a federal estate tax return — even when no tax is owed, specifically to preserve the unused amount (Fidelity, February 2026). Miss the filing, and the first spouse’s exemption can be lost.

One asymmetry matters for estates with grandchildren in the plan: the GST exemption, also $15,000,000 for 2026, is not portable. Pierce Atwood notes that unlike the estate and gift exemption, unused GST exemption cannot pass to a surviving spouse (Pierce Atwood, August 2025). A couple intending multigenerational transfers cannot rely on portability to rescue an unallocated GST exemption at the first death — it has to be allocated deliberately. Unallocated GST exemption can trigger a 40% GST tax stacked on top of estate or gift tax, producing effective rates that the Reed Corporation analysis puts above 60% on multigenerational transfers (Reed Corporation CPA, June 2026). The portability election mechanics deserve closer attention than most plans give them; the portability election surviving spouse benefit only exists if the return is filed on time.

Annual Gifting: The Exclusion That Sidesteps the Exemption Entirely

The annual gift tax exclusion for 2026 is $19,000 per recipient, unchanged from 2025 (IRS, October 2025). It is an exclusion from gift tax, distinct from the $15,000,000 lifetime exemption — gifts within the annual exclusion neither trigger gift tax nor consume any lifetime exemption. A married couple electing gift-splitting can transfer $38,000 per recipient per year. There is no cap on the number of recipients.

The compounding is where the real number lives. A married couple with three children and six grandchildren — nine recipients — can move $342,000 per year ($38,000 × 9) entirely outside the transfer tax system. Over a decade, holding the exclusion flat, that is $3,420,000 removed from the taxable estate without touching the exemption at all. In practice the exclusion rises with inflation, so the cumulative figure runs higher.

Source: annual gift tax exclusion of $19,000 per recipient ($38,000 split) for 2026 per IRS Revenue Procedure 2025-32. Assumes constant exclusion; actual figures rise with inflation indexing.

For estates that will breach the exemption only after years of appreciation, annual gifting is the lowest-friction tool: no trust, no valuation discount, no gift tax return for amounts within the exclusion. Its limit is throughput. $342,000 a year does not move the needle on a $25,000,000 estate growing at 6%, which is why larger estates layer in irrevocable structures. Gifting appreciated assets compounds the benefit further, since future growth on a gift of appreciated assets also leaves the estate — though it carries over the donor’s basis rather than receiving a step-up.

Trust Structures: What They Cost in Tax Terms

Three irrevocable structures dominate planning in the $5M–$25M range, each trading control for estate exclusion. None is a recommendation; each is a cost-and-mechanics question.

A spousal lifetime access trust (SLAT) freezes an asset’s value for estate tax purposes by gifting it irrevocably while preserving indirect access through a spouse-beneficiary. Reinhart’s analysis frames the SLAT as a tool to push appreciating assets — and their future growth — out of the taxable estate while the donor’s spouse retains access to distributions (Reinhart, December 2025). The cost is irrevocability and the loss of access if the beneficiary-spouse predeceases or the marriage ends. The mechanics and ongoing fees of a SLAT setup and ongoing fees structure scale with asset complexity.

A grantor retained annuity trust (GRAT) bets on appreciation outrunning the IRS §7520 hurdle rate. The grantor transfers assets, retains an annuity stream, and any growth above the hurdle passes to beneficiaries free of gift tax. When markets cooperate, the GRAT tax arbitrage mechanics transfer appreciation at near-zero transfer-tax cost; when they don’t, the assets return to the estate and the strategy simply fails without penalty. An irrevocable life insurance trust (ILIT) holds a life insurance policy outside the estate so the death benefit is not added to the taxable estate — relevant precisely because life insurance proceeds are otherwise includable. The ILIT tax and cost analysis turns on premium funding mechanics and the administrative discipline of Crummey notices.

Whether any of these is worth the setup and administrative cost depends entirely on the gap between net worth and exemption — which, for most $5M–$25M households under 2026 law, has narrowed to zero. That is the uncomfortable arithmetic behind the current advice cycle.

The Overlooked Insight

Most 2026 coverage frames the OBBBA as a tax cut for the wealthy and stops there. The dataset says something more specific: the legislation converted estate tax from a near-term certainty into a deferred, conditional risk — and in doing so, made a large share of existing trust documents potentially counterproductive. Katten’s year-end analysis flags that credit shelter and GST trusts built around the old lower exemption may now deny a basis step-up at the surviving spouse’s death, making them disadvantageous rather than protective (Katten, 2025). The same clause that saved estate tax under a $5M exemption can forfeit income-tax basis step-up under a $15M exemption.

That is the figure hiding behind the headline. For a household worth $12,000,000 with a formula-driven credit shelter trust drafted in 2015, the trust may now shelter assets from a tax the estate no longer owes — while stripping heirs of a step-up that would have erased capital gains. The estate tax exposure is $0; the unnecessary capital gains exposure could run into six or seven figures depending on embedded appreciation. Coverage focused on the exemption increase misses that the planning failure has migrated from estate tax to income tax.

What This Means for a $150k+ Household

Income of $150k+ and net worth are different axes, and the federal estate tax now engages only the upper end of the second one. A household earning $150k+ with net worth below $15,000,000 single — or $30,000,000 married with a filed portability election — owes no federal estate tax under 2026 law. For that group, the binding decisions are not estate tax avoidance but three other things: filing Form 706 to preserve a deceased spouse’s exemption even when no tax is due; reviewing any trust drafted before 2018 for formula clauses that may now sacrifice basis step-up; and weighing whether to use the elevated exemption before the December 31, 2034 sunset, which Reed Corporation models as a reversion toward $7,000,000–$8,500,000 per person (Reed Corporation CPA, June 2026).

The threshold that should drive action is roughly $7,000,000 single or $14,000,000 married — the projected post-2034 floor. A household above that line but below the current $15M/$30M exemption sits in the zone where the sunset, not current law, governs the math. Locking in the current exemption through gifting or an irrevocable trust before 2034 is a hedge against legislative reversion, and the anti-clawback regulations protect gifts made at the higher level even if the exemption later drops. Whether that hedge justifies the irrevocability and cost is the actual decision — and it turns on how confident a household is that net worth will exceed the post-sunset floor, a judgment that benefits from running the numbers with an estate attorney and CPA against a specific balance sheet rather than a segment average. The broader tradeoffs of layering structures by net worth are mapped in the estate planning cost guide, and the way complexity drives fees is detailed in the analysis of estate planning cost by complexity.