11/21/2025
OBBBA Update #4: Increased Deduction for Certain State and Local Taxes
As the year draws to a close, we would like to dedicate some posts to new and updated tax deductions that can be found in the “One Big Beautiful Bill Act” (OBBBA). The next deduction we would like to discuss is the State and Local Tax Deduction. The following are a few notes regarding changes to this deduction:
• For taxpayers that itemize, the limitation on the state and local tax deduction has been increased to $40,000 for 2025. It was previously $10,000.
• In 2026, the deduction limitation will be $40,400
• In 2027 through 2029, the deduction limitation will increase by 1% of the limitation in the prior tax year.
• Tax years after 2029 will revert to the $10,000 limitation
• The OBBBA also implemented a phasedown of this deduction. The phasedown is 30% of the taxpayer’s modified gross income that is in excess of a “threshold amount”. The threshold amount is $500,000 in 2025, and will increase by 1% of the previous taxable year in subsequent years. The phasedown will not reduce the deduction to below $10,000.