Estate Tax Planning After OBBBA: What Family Business Owners Should Revisit Now

For most of 2024 and early 2025, family business owners were being advised to accelerate gifts, freeze values, and complete intergenerational transfers before the Tax Cuts and Jobs Act provisions sunsetted at the end of 2025. That urgency was reasonable under the prior law. The One Big Beautiful Bill Act (OBBBA), signed on July 4, 2025, changed the landscape by making the larger exemption permanent at $15 million per individual and $30 million for a married couple, while setting the top gift and estate tax rate to increase from 40% to 45% in 2026. For family business owners, the case for planning did not disappear. It shifted, and the shape of the right plan is now different for most families than it was last year.

What OBBBA Actually Changed

Three provisions of OBBBA drive most of the practical implications for family businesses. The exemption was stabilized, eliminating the looming sunset that had been driving much of 2024's acceleration behavior. That removes the "use it or lose it" element that had been pushing families toward large transfers on compressed timelines.

The top transfer tax rate moved from 40% to 45%, effective in 2026. For estates already above the exemption threshold, that rate change affects the cost of doing nothing. A family business owner whose taxable estate will ultimately exceed the exemption is looking at a higher marginal cost per dollar than would have applied previously.

Valuation-based planning mechanics (discounting for lack of marketability and lack of control, use of defective grantor trusts, intentionally mispriced sales, and similar techniques) remained available under OBBBA. The legislation declined to adopt proposals that would have restricted these tools. That is a meaningful planning-design signal.

Why Families Should Revisit Plans Already in Motion

Many family businesses engaged in significant planning between 2022 and mid-2025 in anticipation of the TCJA sunset. Some of that planning now sits in a different environment than was modeled at the time. Three areas warrant a fresh look.

First, the liquidity sequencing assumptions may be off. A family that completed a large gift of business equity in 2024 under an expected $7 million exemption at sunset may have over-gifted relative to the now-permanent $15 million exemption. The technical options for adjusting this vary by structure but are generally limited. What can be done is to recalibrate the remaining plan, including charitable component timing, trust funding strategies, and generation-skipping transfer allocation, against the new baseline.

Second, the discount positions taken in older appraisals may not match current market conditions. A family business appraised in 2022 at levels reflecting that year's market, interest rate environment, and sector trading multiples may be carrying documentation that does not reflect the 2026 environment. Where valuations are part of ongoing plans (for instance, annual gifts priced against a formula), the base valuation should be refreshed.

Third, the rate change creates planning asymmetry. A family with a taxable estate that will clearly exceed the exemption faces a higher forward cost of inaction in 2026 than it did in 2025. A family whose taxable estate sits near or below the exemption faces less urgency than before. Those two situations call for different planning calendars, and a family that was grouped with the first category under the old rules but now sits in the second category should recalibrate accordingly.

The Family Business Planning Calendar for 2026

For owners of closely held businesses, several specific planning windows are worth considering this year.

Pre-transaction gifting. Families anticipating a sale of the business in the next three to five years have a specific window in which gifts are particularly efficient. Gifting business equity before a transaction has occurred allows the gift to be priced at a value that can be defended through standard discount arguments (minority interest, lack of marketability). Once a transaction process has started, those discounts become harder to support and the gift economics become less attractive. For families considering either a strategic sale or a sponsor transaction, pre-process gifting is a specific, time-sensitive planning lever.

Grantor trust structures. The intentionally defective grantor trust remains one of the more efficient vehicles for transferring appreciating business interests. The grantor continues to pay income tax on the trust's earnings (which is itself a further non-taxable transfer to the beneficiaries), while the business appreciation accumulates outside the grantor's taxable estate. OBBBA did not curtail this structure, and the higher 45% rate makes the compounding benefits more valuable for families above the exemption.

Installment sale to grantor trust (sometimes called a sale to an IDGT). For families with significant appreciation expected, selling business interests to a grantor trust in exchange for a promissory note at the applicable federal rate can be an effective way to freeze value at current levels while capturing future appreciation outside the estate. The technique requires careful execution around seed gift sizing, note terms, and valuation discipline, but it remains a mainstream tool.

Spousal Lifetime Access Trusts. For married couples, SLATs allow each spouse to establish an irrevocable trust for the benefit of the other spouse (and descendants), using exemption in a way that retains indirect access to the transferred assets. OBBBA's permanence of the higher exemption makes SLATs more broadly useful because families are no longer squeezing the planning into a sunset window.

Business Operating Considerations

Beyond pure estate planning, the rate change has implications for how family businesses think about ownership succession more broadly.

Successor compensation and equity structures should be reviewed. If the plan is to transfer ownership gradually through management equity programs, the tax treatment of those transfers at the family level interacts with the compensation design at the business level. Phantom equity, profits interests, and actual equity grants each have different implications, and the interaction with family transfer planning is not trivial.

Buy-sell agreements deserve a look. Many closely held businesses have buy-sell agreements drafted a decade or more ago that do not reflect current estate tax realities, current market valuations, or current insurance market conditions for buy-sell funding. The rate change is a natural prompt for an updated review.

Succession liquidity planning. Where the business itself is expected to be the largest estate asset, families need to have realistic plans for meeting estate tax liability without distressing the business. That may involve life insurance structures, installment payment elections under Section 6166, or advance liquidity planning through partial recapitalizations. All of these work better when designed in advance than under time pressure.

Forward Look

Several regulatory and market developments are worth tracking through 2026. The IRS is expected to issue additional guidance on valuation discounts, particularly for family-controlled entities, and that guidance will shape planning design. State-level estate tax rules continue to diverge from federal rules, and residency strategies remain an active consideration for families in high-tax states. Finally, interest rate movements affect the attractiveness of several structures (GRATs, installment sales to grantor trusts) where the applicable federal rate governs the economics.