The One Big Beautiful Bill (OBBB) signed by President Trump includes a federal cap on the state and local tax (SALT). Until 2024, SALT was capped at $10,000 under the 2017 Tax Cuts and Jobs Act (TCJA), but the OBBB increased it to $40,000. The cap will rise by 1% each year through 2029, and barring any moves by Congress, it will revert to $10,000 in 2030. That means high-earning taxpayers and taxpayers in high-tax states have a short window to make the most of the extra $30,000 deduction.
What Is the SALT Deduction?
SALT stands for state and local taxes. The SALT deduction allows taxpayers who itemize their taxes to claim a deduction for some state and local taxes from their federal taxable income, including:
- State and local income taxes
- Property taxes
For many households, just property taxes alone can exceed $10,000, so the old cap blocked them from deducting the full amount. The new $40,000 cap opens the door for a much larger write-off.
MAGI Matters
Whether or not you can claim the SALT deduction depends on your modified adjusted gross income (MAGI). If your income is on the higher side, you might not qualify for the full SALT deduction. Once your MAGI exceeds certain limits, the deduction starts to reduce. So, if you’re in a higher tax bracket, it makes sense to do the math ahead of time.
How This Affects Estimated Taxes
If you typically owe quarterly estimated taxes, you might want to adjust the timing. Making your fourth-quarter state income tax payment before December 31 ensures those amounts are included in your 2025 SALT deduction. For some people, that could mean paying more of their state taxes before the end of the year or increasing withholding at work. The $40,000 cap makes these strategies more worthwhile than they’ve been since 2018.
Ways to Capitalize on the $40,000 SALT Deduction
Here are a few smart ways to make the most of the new deduction:
- Prepay property taxes: If your local government allows it, think about paying part of your 2026 property tax bill before the end of 2025. Doing so lets you take the deduction right away instead of waiting. Just be sure to check that your county allows prepayments.
- Review State Tax Withholding: If you usually owe a hefty state tax bill when you file, you could increase your withholding at work or send in extra estimated payments during the year. With the new SALT cap, these payments are now more likely to make a difference on your return.
- To Itemize or Not to Itemize: The SALT deduction only helps if you itemize instead of taking the standard deduction, so do the math to see if itemizing is the right move for you. Add up your SALT, mortgage interest, charitable giving, and medical expenses. If the total beats the standard deduction, itemizing will save you more.
- Time Other Deductions: Some deductions, like medical costs, are unpredictable. But others, such as charitable donations, can be timed. If you’re on the border where itemizing makes sense, shifting more of those expenses into 2025 can push your total high enough to take full advantage of the new SALT cap.
If you’re unsure about whether or not you should itemize your taxes, or if you could benefit from the new SALT cap, consult a tax professional who can help you make sense of it all.
