What the One Big Beautiful Bill Act means for high-income Californians and how to make the most of it before 2030.
If you own a home in California, pay state income taxes, and have been frustrated by the $10,000 cap on your federal SALT deduction for the past seven years, your wait is over. Starting with the 2025 tax year, the federal cap on state and local tax deductions has quadrupled to $40,000, making this one of the most impactful tax changes for Californians since 2018.
But this window is temporary. The higher cap is set to revert back to $10,000 in 2030, which means you have five tax years to take full advantage. Here is what you need to know, and how to make sure you are not leaving money on the table.
What Is SALT and What Changed?
SALT stands for State and Local Taxes, the federal deduction that lets itemizers reduce taxable income by the amount paid in state income taxes and property taxes. Before 2018, there was no cap. The Tax Cuts and Jobs Act introduced a $10,000 limit that hit Californians hard.
Now, the One Big Beautiful Bill Act, signed July 4, 2025, has raised that cap to $40,000 for the 2025 tax year, with 1% annual increases through 2029 before reverting to $10,000 in 2030. This change is retroactive to January 1, 2025.
Key Numbers at a Glance
- 2025 SALT cap: $40,000 for single, head of household, and married filing jointly
- Married filing separately: $20,000
- Phase-out begins at: $500,000 MAGI
- Cap reverts to: $10,000 in 2030
- 2025 standard deduction: $15,750 for single filers and $31,500 for married filing jointly
Who Benefits Most?
The biggest beneficiaries are California homeowners with significant property tax bills, professionals earning $200,000 or more, business owners, and dual-income households whose combined SALT payments far exceeded the old $10,000 cap. If you already itemize due to mortgage interest or charitable giving, the larger SALT deduction can add meaningful savings.
For example, a married couple paying $24,000 in state income taxes and $16,000 in property taxes has $40,000 in total SALT. Under the old cap, they could only deduct $10,000. Under the new cap, they may deduct the full $40,000, potentially saving $10,500 or more in federal taxes at a 35% bracket.
Step 1: Confirm Itemizing Makes Sense
The SALT deduction is only available if you itemize on Schedule A. For 2025, the standard deduction is $15,750 for single filers or $31,500 for married filing jointly. Your total deductions, including SALT, mortgage interest, charitable contributions, and eligible medical expenses, must exceed those thresholds.
For many California homeowners with a mortgage and meaningful charitable giving, the higher SALT cap now makes itemizing much more attractive.
Step 2: Add Up All Eligible SALT Payments
Your total SALT deduction can include:
- California state income tax withheld from your paycheck
- Quarterly estimated state tax payments made during the year
- Property taxes paid on your primary residence, vacation home, or land
- Local income taxes, if applicable
- Vehicle License Fee (VLF), the value-based portion that qualifies as personal property tax under SALT
Important: You can only deduct taxes actually paid during the tax year. If you paid your January 2026 property tax bill in January 2026, that payment applies toward your 2026 deduction, not 2025. Timing matters.
Step 3: Watch for the High-Income Phase-Out
Once your modified adjusted gross income exceeds $500,000, your SALT deduction begins to phase out between $500,000 and $600,000. If your income falls near this range, it may be worth discussing strategies such as delaying income recognition or Roth conversions, timing business income and expenses, and coordinating year-end investment decisions to avoid unnecessary capital gains.
Step 4: Maximize the Deduction With Strategic Timing
Because the higher SALT cap expires in 2030, consider these strategies to make the most of the current window:
- Prepay property taxes: Paying your 2026 installment before December 31, 2025 may capture an additional deduction, but payments must be assessed and paid, not merely estimated.
- Bunch charitable contributions: Pairing a large gift, such as a Donor Advised Fund contribution, with a high-SALT year can widen the margin above the standard deduction and make itemizing more valuable.
- Review withholding and estimated payments: A catch-up state tax payment before year-end may make sense while the $40,000 cap is in effect.
Step 5: Business Owners Should Consider the Pass-Through Entity Election
California offers a valuable workaround for S-corp, partnership, and LLC owners through the Pass-Through Entity tax election. The business pays state taxes at the entity level and deducts them on the federal business return, outside of the SALT cap.
For business owners who would still hit the cap at $40,000, the PTE election can unlock substantial additional federal deductions and is worth discussing with a qualified tax advisor.
The Bottom Line
The $40,000 SALT deduction is the most meaningful federal tax relief California homeowners have seen in nearly a decade, but the benefit is not automatic. It requires itemizing, careful timing, and coordination across your full financial picture.
With the cap reverting in 2030, the time to act is now. At Channel Wealth, we work alongside your CPA and tax advisors to help ensure your financial plan captures every opportunity available.
Ready to Review Your Tax Strategy?
Schedule a complimentary conversation with a Channel Wealth advisor to discuss how the new SALT rules apply to your specific situation. Call 805-898-0893 or visit channelwealth.com/contact.
This article is intended for informational purposes only and should not be construed as tax or legal advice. Tax laws are subject to change and individual circumstances vary. Please consult a qualified tax professional regarding your specific situation. Channel Wealth, LLC is a Registered Investment Advisor with the U.S. Securities and Exchange Commission.