The 2025 tax law temporarily raises the federal deduction for state and local taxes (SALT) from $10,000 to $40,000, a change that has drawn significant attention. Despite the increase, only a small number of taxpayers will see meaningful benefits.
Before 2017, taxpayers could deduct unlimited state and local taxes. That year, Congress capped the deduction at $10,000. The new law raises the cap for the next five years, but it will revert to $10,000 in 2030 unless lawmakers take further action.
Most taxpayers will not notice much difference because they cannot itemize enough deductions to exceed the standard deduction. High earners may see their benefits shrink due to phaseouts or the alternative minimum tax. In practice, only about 4 percent of taxpayers are likely to see significant savings, with maximum federal tax reductions of around $10,000 for those who qualify.
The SALT deduction has long sparked debate. Supporters say it prevents double taxation and provides relief for taxpayers in high-tax states, while critics argue it favors wealthier residents and may encourage higher local taxes. Lawmakers in competitive districts successfully pushed for the temporary increase, but the long-term effect on state and local budgets will likely remain limited.
For eligible taxpayers, this change offers an opportunity to plan ahead. The temporary boost can provide meaningful savings now, but stay informed about strategic matters since the benefit will eventually revert.
