TCJA Sunset Averted: The 2017 Tax Cuts Are Now Permanent

Part of our 2025 Tax Law Changes guide — the complete breakdown of the One Big Beautiful Bill Act.

For most of the last several years, tax planning has been shadowed by a single date: December 31, 2025. That was when most of the individual provisions of the 2017 Tax Cuts and Jobs Act (TCJA) were scheduled to expire, snapping rates, deductions, and exemptions back to their pre-2018 levels. The 2025 One Big Beautiful Bill Act removed that cliff.

What was set to expire

Absent legislation, on January 1, 2026 the top individual rate would have returned toward 39.6%, the standard deduction would have been roughly cut in half, personal exemptions would have returned, the Section 199A qualified business income deduction would have vanished, and the estate and gift tax exemption would have dropped by about half.

What is now permanent

• The seven-bracket rate schedule topping out at 37%.
• The near-doubled standard deduction (indexed).
• The suspension of personal exemptions and the higher Child Tax Credit.
• The Section 199A pass-through deduction.
• The higher estate and gift tax exemption.

Why “permanent” still deserves an asterisk

Permanent in tax law means “until Congress changes it again.” Rates are stable for now, but several of the newest provisions layered on by the 2025 law are explicitly temporary. The practical takeaway: the doomsday 2026 modeling many firms prepared is off the table, but multi-year projections should separate the permanent base from the temporary add-ons.

Planning implications

Strategies that were built around the sunset — rushing lifetime gifts before 2026, accelerating income into low-rate years, or Roth conversions timed to the cliff — should be revisited. The urgency changes when the rates are not scheduled to rise.

This article is educational and current as of its publication date. Federal tax provisions — including dollar thresholds, phase-outs, and effective dates — change frequently and many items described here are temporary. Confirm the current statute, IRS guidance, and your client’s facts before relying on any point below. This is not legal or tax advice.