Estate Planning Considerations for Illinois Residents Following Federal Tax Law Adjustments

The enactment of the One Big Beautiful Bill Act (OBBBA) on July 4, 2025, has permanently established a federal estate tax exemption of $15 million per person, indexed for inflation. While this shift reduces federal tax obligations for many, Illinois residents must continue to account for the state-level estate tax, which remains at a significantly lower threshold. Kravets Law Group is currently advising families to distinguish between federal and state mandates to ensure their long-term estate plans remain effective and compliant.

The divergence between federal and state estate tax policies creates a distinct planning environment for Illinois residents. While the federal exemption has been stabilized at a higher level, the state maintains a $4 million exemption threshold that is not indexed for inflation. Because Illinois utilizes a cliff tax structure, estates exceeding this state-level threshold face taxation on the total value rather than only the amount exceeding the exemption. This creates a scenario where families may avoid federal tax entirely while remaining subject to substantial state-level obligations. Consequently, the permanence of the federal exemption does not eliminate the necessity for local estate planning, as the state-level tax continues to impact a broader segment of the population, including those with significant real estate or business holdings.

Furthermore, the lack of portability for the Illinois exemption requires specific legal strategies to ensure both spouses can utilize their individual tax-free allowances. Without proactive adjustments to estate documents, families risk losing the value of these exemptions upon the death of the first spouse. Given that state laws are subject to legislative changes, the current landscape necessitates a review of existing trusts and ownership structures. Practitioners note that historical planning strategies may no longer be sufficient under the current regulatory framework. By focusing on state-specific rules rather than relying solely on federal updates, families can better manage their assets and mitigate potential tax liabilities that may arise due to the ongoing disparity between federal and state tax exemptions.