Utilizing the Estate and GST Exemption: Maximizing Multigenerational Wealth Transfer

Following the enactment of the One Big Beautiful Bill Act, the federal basic exclusion from estate tax has been permanently set at $15 million per individual (as of 2026), indexed annually for inflation. This represents a fundamental shift in estate planning, providing wealthy families with both certainty and substantial planning capacity for the foreseeable future. Understanding how to utilize this exemption strategically, particularly when combined with generation-skipping transfer (GST) tax planning, separates adequate estate plans from truly powerful multigenerational wealth transfer structures.

Understanding the Basic Exclusion Amount

The basic exclusion amount functions as a unified credit applicable to both lifetime gifts and taxable transfers at death. Any U.S. citizen or resident may transfer up to $15 million without incurring federal gift or estate tax. For married couples, this creates a combined $30 million exemption.

The exemption operates on a dollar-for-dollar basis with respect to lifetime giving. Every dollar consumed by lifetime gifts reduces the exemption available at death. A donor who makes $15 million in lifetime gifts to irrevocable trusts will have zero exemption remaining to shelter assets at death. This unified structure creates a fundamental choice: Utilize the exemption during life through strategic gifting, or preserve it for transfers at death. For families with substantial wealth, the answer increasingly favors lifetime gifting.

It is also important to note that Illinois imposes its own estate tax, with an estate tax limit of only $4 million, significantly lower than the federal threshold. Implementing lifetime gifting strategies can not only maximize use of the federal exemption but also help reduce Illinois estate tax exposure for larger estates.

Getting the Growth Out

When assets are transferred to irrevocable trusts during a donor’s lifetime, all future appreciation occurs outside the donor’s taxable estate. This represents the primary value of lifetime giving compared to testamentary transfers.

Consider a $15 million gift to an irrevocable trust. The transfer consumes the entire basic exclusion amount, generating no gift tax. What happens over 30 years?

At a 3% annual return, the $15 million grows to approximately $36.4 million. At a 5% return, it reaches approximately $64.8 million. At an 8% return, achievable through diversified equity exposure, the initial gift grows to approximately $150.9 million. The estate tax saved (at the present 40% rate) on the 8% scenario exceeds $54 million on the appreciation alone.

These projections illustrate a fundamental principle: The longer the time horizon and higher the expected returns, the more valuable lifetime gifting becomes. Donors who transfer appreciating assets early maximize the compounding value of the gift outside their taxable estates.

Generation-Skipping Transfer Tax Planning

The federal transfer tax system also includes a generation-skipping transfer (GST) tax that imposes an additional 40% tax on transfers to grandchildren or more remote descendants. Like the basic exclusion amount, the GST exemption stands at $15 million per individual ($30 million for married couples), indexed annually for inflation.

When GST exemption is properly allocated to trusts, those trust assets (including all appreciation) remain exempt from both estate tax and GST tax as they pass through subsequent generations. In states like Illinois, which permit perpetual trusts, this creates truly dynastic wealth structures that could avoid imposition of gift, estate, or GST tax forever.

The difference between allocating and failing to allocate GST exemption becomes starkly apparent across generations. Consider the same $15 million gift, growing at 4% annually over 30 years to approximately $48.7 million.

Without GST exemption allocated to the trust, when the first generation dies and assets pass to grandchildren, the 40% GST tax applies to the entire trust value, generating approximately $19.5 million in tax and leaving only $29.2 million for descendants. With proper GST allocation at the time of the original gift, the entire $48.7 million passes tax-free to grandchildren. This single allocation decision preserved nearly $19.5 million for the family.

The contrast becomes even more dramatic across multiple generations. Without applying GST exemption, every generational transfer triggers imposition of estate tax, creating unnecessary and significant erosion of wealth. With proper allocation of GST exemption, trust assets can grow on an estate tax-free basis across generations.

Strategic Implementation

Effectively deploying these exemptions requires careful planning.  First, making taxable gifts earlier maximizes the opportunity to remove growth from exposure to estate tax.  Families should make lifetime gifting a priority. Every year of delay represents a lost opportunity to remove growth from the taxable estate. 

Second, asset selection matters enormously. Individuals or married couples should transfer high-growth-potential assets (such as concentrated equity positions, closely held business interests, and emerging market real estate) to remove the greatest future appreciation from the taxable estate.

Third, the allocation of GST exemption must be timely and deliberate. GST exemption should be allocated on timely filed gift tax returns to avoid complications.

Last, do not overlook the opportunity for the application of discounts in valuing gifts of business interests. Properly structured gifts of minority interests in family entities may qualify for meaningful valuation discounts, effectively leveraging the maximum use of the exemptions.

Conclusion

The permanent $15 million basic exclusion amount, combined with equivalent GST exemption, provides unprecedented opportunity for tax-efficient wealth transfer. When properly deployed through lifetime gifts to irrevocable trusts, these exemptions can remove tens or hundreds of millions from the transfer tax system through appreciation removal. The question is not whether to deploy these exemptions, but when and how to do so most effectively.

Questions about how the new estate tax exclusion and GST exemption impacts your tax strategy? Reach out to Stephen Pratt, Robert Romanoff, or another member of LP’s Trusts & Estates Group.