Trump Tax Cuts Extension 2026: TCJA Provisions, What Changed, and Your Take-Home Pay

The Tax Cuts and Jobs Act of 2017 was the most significant overhaul of the US tax code in three decades. For individuals, many of its provisions were set with a sunset clause — expiring after December 31, 2025 — creating what tax professionals called the 'TCJA cliff.' Without legislative action, individual tax rates, the standard deduction, the SALT cap, the pass-through deduction, and the estate tax exemption would all revert to pre-2017 levels in 2026. The political stakes were enormous.

The 'One Big Beautiful Bill' — the 2025 reconciliation legislation — extended the core TCJA individual provisions, averting the cliff for most taxpayers. This guide explains what was in the TCJA, what the extension preserves, where changes were made, and what it all means for your 2026 take-home pay. Whether you're an employee, business owner, or high-net-worth individual planning your estate, the TCJA extension has material implications.

What Was the TCJA and Why Did It Matter

The Tax Cuts and Jobs Act (Public Law 115-97) was signed by President Trump on December 22, 2017. For individuals and pass-through businesses, most provisions were temporary, set to expire after December 31, 2025. For corporations, the TCJA provisions were permanent — including the flat 21% corporate income tax rate (down from 35%).

Key TCJA individual provisions that were set to expire:

• Lower individual tax rates: TCJA reduced the top rate from 39.6% to 37% and reduced rates across most other brackets. Without extension, rates would revert to pre-2017 levels.
• Higher standard deduction: TCJA roughly doubled the standard deduction. Without extension, it would revert to approximately half the 2025 amount.
• $10,000 SALT cap: TCJA capped the deduction for state and local taxes at $10,000. Without extension, this cap would disappear — benefiting high-tax state residents who itemise.
• Section 199A deduction: A 20% deduction on qualified business income (QBI) for pass-through businesses. Without extension, this deduction disappears entirely.
• Doubled estate tax exemption: TCJA doubled the basic exclusion amount. Without extension, it would roughly halve from ~$14M to ~$7M per person.
• Child tax credit: TCJA increased the child tax credit from $1,000 to $2,000 and expanded refundability.

What the 2026 Extension Preserves: Key Provisions

The reconciliation bill extended the following core TCJA provisions for individual taxpayers:

The extension largely maintains the tax landscape that US taxpayers have known since 2018, providing certainty for financial planning decisions that had been in limbo as the TCJA sunset approached.

Individual Tax Rate Changes Under TCJA Extension

The TCJA restructured individual tax brackets, and the extension maintains this structure with annual inflation adjustments. For 2026, the estimated brackets for single filers are:

Under pre-TCJA rates, a high earner at $500,000 income would have faced a 39.6% marginal rate. Under the extended TCJA, they face 35%. The tax saving on income above $418,000 is 4.6 cents per dollar — meaningful for high earners, but the TCJA's biggest tax cuts were for middle-income earners who benefited most from the bracket restructuring and expanded standard deduction.

Standard Deduction vs Itemising in 2026

One of the TCJA's most impactful changes was the near-doubling of the standard deduction, which dramatically reduced the number of Americans who benefit from itemising. The TCJA extension maintains this structure:

• The standard deduction for 2026 is $16,100 (single) and $32,200 (married filing jointly), inflation-indexed annually under OBBBA.
• To benefit from itemising, your total itemised deductions (mortgage interest, state/local taxes up to $10,000, charitable contributions, medical expenses above 7.5% AGI threshold) must exceed the standard deduction amount.
• Under the original TCJA, approximately 90% of filers now claim the standard deduction — up from about 70% pre-TCJA.

High-value itemised deductions include:

• Mortgage interest: On loans up to $750,000 (TCJA limit, maintained). Pre-TCJA was $1M.
• State and local taxes (SALT): Raised to ~$40,400 for 2026 under OBBBA (single and MFJ; $10,000 for MFS unchanged) — expires after 2029, reverts to $10,000 in 2030.
• Charitable contributions: Up to 60% of AGI for cash donations (TCJA increased from 50%).
• Medical expenses: Above 7.5% of AGI.

SALT Cap: Raised to ~$40,400 for 2026 (Through 2029)

The State and Local Tax (SALT) deduction cap was raised by OBBBA from $10,000 to approximately $40,400 for 2026 (for single and married filing jointly; $10,000 for married filing separately — unchanged). The cap increases by approximately 1% per year through 2029, then reverts to $10,000 in 2030 unless Congress acts again.

Impact of the SALT increase on high-tax-state residents:

• A New York City resident paying $25,000 in state and local taxes can now deduct the full $25,000 federally — no more cap until the amount exceeds ~$40,400.
• At a 35% marginal rate, the full deductibility of $25,000 vs. the prior $10,000 cap translates to approximately $5,250 in additional federal tax savings.
• For California residents in the 37% bracket paying $40,000+ in state tax, the near-full deductibility is significant — California's 13.3% top rate generates large SALT amounts that are now mostly deductible.

The SALT increase is temporary: it expires after 2029. The 2030 cliff creates the same planning dynamic that the original 2026 sunset created — residents of high-tax states face another potential $10,000 reversion. Congress will likely face pressure to extend the higher cap before 2030.

Note: taxpayers who do not itemise (those taking the standard deduction) are unaffected by the SALT cap change.

Pass-Through Business Deduction (Section 199A) Extended

Section 199A — the 20% deduction on Qualified Business Income (QBI) for pass-through businesses — is one of the most valuable provisions in the TCJA for business owners, and the extension preserves it.

Who benefits from Section 199A:

• Sole proprietors, freelancers, and self-employed individuals with a Schedule C business.
• Partners in partnerships with pass-through income.
• S corporation shareholders receiving pass-through income.
• Rental real estate owners who meet safe harbor conditions under Rev. Proc. 2019-38.

How it works: If you have $200,000 of qualified business income, you can deduct $40,000 (20%) — reducing your federal taxable income by $40,000. At the 24% marginal rate, this saves $9,600 in federal tax.

Limitations and phase-outs:

• For Specified Service Trades or Businesses (SSTBs) — lawyers, doctors, consultants, financial advisors — the deduction phases out once taxable income exceeds $201,750 (single) or $403,500 (MFJ) in 2026 (per Rev. Proc. 2025-32, inflation-indexed annually).
• The deduction is also limited to 50% of W-2 wages paid by the business, or 25% of W-2 wages plus 2.5% of qualified property — preventing sole proprietors with high income but no employees from claiming unlimited deductions.

What This Means for Your 2026 Paycheck

For most salaried employees, the TCJA extension means no change in withholding or take-home pay relative to 2025 — the same rates, same standard deduction, same AMT thresholds. The extension was designed to preserve continuity rather than create new tax changes.

However, there are important nuances:

• Inflation adjustments continue: Even with the TCJA extended, all dollar amounts are adjusted annually for inflation. The 2026 brackets, standard deduction, and other thresholds will be slightly higher than 2025 due to inflation indexing.
• High earners in high-tax states: The SALT cap was raised to ~$40,400 for 2026 — a significant improvement for most CA, NY, and NJ residents. However, the cap phases out for high earners above $500K MAGI (30¢ per dollar), so those above ~$633K MAGI (MFJ) still face near-zero effective SALT deductibility.
• Business owners: The 199A deduction continuation is a significant win — potentially worth tens of thousands of dollars annually for successful self-employed individuals and pass-through business owners.
• Estate planning: The $15M per person exemption (portability preserved) is now permanent under OBBBA — no reversion is scheduled. Only the very largest estates face federal estate tax.

The TCJA extension removes the largest source of tax uncertainty for 2026 planning. The focus for most individuals now shifts back to income management, retirement contributions, and state-level tax optimisation rather than navigating TCJA cliff scenarios.