TCJA Sunset Preparedness 2025: Estate & Income Tax Strategies

Last Updated: November 28, 2025

• Key Takeaways
• Sunset Imminent: The tax bracket reversion 2026 is scheduled to occur on Jan 1, 2026, pushing top rates from 37% back to 39.6% unless Congress acts.
• Estate Tax Cliff: The estate tax exemption is at a historic high of ~$13.99M for 2025 but is set to be cut in half in 2026, creating a “Use It or Lose It” scenario.
• Income Strategy: With rates likely rising next year, 2025 is a critical year for Roth conversions and realizing income at current lower rates.
• SALT Cap Remains: The State and Local Tax (SALT) deduction cap remains at $10,000 for 2025, despite proposals to raise it.

Table of Contents

As of December 1, 2025, high-net-worth individuals and business owners are operating under the looming shadow of the "TCJA Sunset." The provisions of the Tax Cuts and Jobs Act are scheduled to expire on December 31, 2025. Without last-minute legislation, we face a tax bracket reversion in 2026 that will spike top rates back to 39.6% and halve the estate tax exemption.

Taxpayers must pivot to defensive "sunset planning," locking in the current high exemptions and lower rates before they vanish. For a detailed breakdown of filing requirements for this final TCJA year, see our guide on Strategic Filing for Form 1040 (Tax Year 2025): Navigating New Reporting Rules & Phase-Outs.

The TCJA Sunset: Preparing for 2026 Reversions

Unless Congress passes a major extension, 2025 is the final year of the current tax regime. In 2026, the brackets are scheduled to revert to the pre-2018 structure: 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%. This makes 2025 a unique window to accelerate income or convert assets at historically low rates.

SALT Cap Reality

Despite various proposals, the State and Local Tax (SALT) deduction remains capped at $10,000 for the 2025 tax year. While the cap is scheduled to expire in 2026, the standard deduction will also decrease significantly, changing the math on itemizing. For strategies on managing this limitation, refer to The 2025 SALT Cap: Itemized Deduction Strategies.

Estate & Gift Strategies: The “Use It or Lose It” Year

The estate tax exemption 2026 changes are the primary focus for wealth preservation. The 2025 exemption is approximately $13.99 million per individual ($27.98 million for couples). On January 1, 2026, this is scheduled to drop to approximately $7 million per individual. Wealthy families must use the “bonus” exemption amount in 2025 or lose it forever.

Gift Tax Exclusion Limits 2025

For 2025, the annual gift tax exclusion is $19,000 per recipient. Married couples can split gifts to transfer $38,000 per beneficiary tax-free. Utilizing this exclusion before year-end is a simple, effective way to reduce the taxable estate without using your lifetime exemption.

Case Study: The SLAT Strategy
The Thompson family (Estate value: $28M) is funding an irrevocable Spousal Lifetime Access Trust (SLAT) in 2025. By gifting $27M into the trust now, they lock in the 2025 exemption. If they waited until 2026, their exemption would drop to ~$14M (combined), leaving $14M of their wealth exposed to a 40% estate tax. Acting in 2025 saves their heirs approximately $5.6 million in taxes.

Income Tax Planning: Roth Conversions & Brackets

With tax rates likely rising, Roth conversion strategies 2025 involve paying tax now to avoid higher rates later. Converting Traditional IRA funds to Roth in 2025 allows you to pay tax at the current top rate of 37% (or lower brackets) rather than the projected 39.6% top rate in 2026.

Income Realization

Unlike previous years where deferring income was the goal, 2025 may be the year to accelerate income (bonuses, consulting fees, capital gains) to capture the current lower rates. While there are no special deductions for tips or overtime, proper reporting remains essential. Learn more about income reporting in our article: Understanding Taxable Income: Tips and Overtime Reporting.

Digital Assets

The IRS has delayed the full implementation of Form 1099-DA cost basis reporting until 2026, but gross proceeds reporting may affect 2025 filings. Ensure you have accurate records. See Crypto Tax Reporting 2025: Form 1099-DA and Digital Assets for details.

Forms & Deadlines

Preparing for the 2025 filing season requires attention to specific forms, especially for gift and estate planning:

Frequently Asked Questions

Conclusion

The "TCJA Sunset" is the defining narrative for 2025 tax planning. With the estate tax exemption cliff approaching and the tax bracket reversion 2026 likely, the focus for the remainder of 2025 must be on locking in current benefits. High-net-worth individuals should prioritize estate transfers and income realization strategies before the window closes on December 31, 2025.

Disclaimer: This article is for informational purposes only and does not constitute legal or tax advice. It reflects the legislative landscape as of December 1, 2025. Consult a qualified CPA for your specific situation.