California taxpayers may see a larger federal deduction for state and local taxes under the One Big Beautiful Bill Act (OBBBA). The change is real. It is not a $40,000 tax credit, and it does not guarantee a particular tax saving. The result depends on filing status, modified adjusted gross income, itemized deductions, and the taxes you actually paid.
What The OBBBA Change Does
For tax year 2025, OBBBA raised the federal SALT deduction cap to $40,000. The cap is scheduled to increase by 1% each year: $40,400 for 2026, $40,804 for 2027, $41,212 for 2028, and $41,624 for 2029. Unless Congress changes the law, the cap returns to $10,000 in 2030.
SALT is an itemized deduction, not a credit. It generally covers state and local real property taxes plus either state and local income taxes or sales taxes. You must itemize to use it, and the deduction still cannot exceed the applicable cap. Married taxpayers filing separately generally use half of the joint-return cap.
How The High-Income Phaseout Works
The higher cap is subject to a separate limitation for higher-income taxpayers. For 2025, the phaseout begins at $500,000 of modified adjusted gross income. For 2026, the threshold is scheduled to be $505,000, with the threshold increasing by 1% in later years.
The reduction is generally 30% of the modified adjusted gross income above the applicable threshold. It cannot reduce the cap below $10,000. For example, a 2026 filer with $555,000 of modified adjusted gross income would have a preliminary reduction of $15,000, leaving a $25,400 SALT cap before the rest of the return. That calculation is not a promise of a deduction or tax savings.
What This Means In California
California does not use the federal SALT cap to calculate its own taxable income. The federal cap limits the deduction on the federal return. It does not turn California income tax into a dollar-for-dollar federal benefit. California residents still need to follow California's separate rules for state itemized deductions, including the treatment of California income tax paid.
Many California taxpayers have substantial state income tax, property tax, or both. Even so, the larger federal cap may not help if you use the standard deduction, hit another federal limitation, or have too little eligible SALT to reach the cap. Your marginal federal tax rate and your full itemized-deduction picture determine the value of any additional deduction.
Business owners should also keep the California pass-through entity tax (PTE) in a separate analysis. A qualifying business may have a federal deduction for entity-level tax under the PTE rules. That is not the same as an individual's SALT cap. Eligibility, elections, payments, and California filing requirements matter.
A Practical California Example
Assume a married California couple filing jointly in 2026 pays $50,000 of eligible state and local taxes and has modified adjusted gross income below the phaseout threshold. Their federal SALT deduction is capped at $40,400. Since $40,400 of SALT alone already exceeds the $32,200 standard deduction, this couple benefits from itemizing — the incremental federal benefit is roughly $8,200 of extra deductions ($40,400 minus $32,200) multiplied by their marginal rate. It is not a $40,400 refund; it is a deduction that reduces taxable income.
A different couple with the same taxes but $555,000 of modified adjusted gross income would face the phaseout described above. Their preliminary cap would be $25,400, not $40,400. Other limitations and the final tax return can change the result.
What To Review Before Filing
Keep records for California income tax payments, property taxes, and any sales-tax deduction you plan to claim. Compare itemizing with the standard deduction using the correct tax year and filing status. If you are near the high-income threshold, model the phaseout rather than assuming the full cap applies. Business owners should separately review any PTE election with their tax adviser.
The OBBBA change is worth reviewing. The right answer is specific to your return. LaviCPA can help you compare the federal and California treatment before you file. Contact the firm if you would like a fact-specific review of your SALT and itemized-deduction position.