The 2025 SALT deduction cap changes instituted as part of the One Big Beautiful Bill Act (OBBBA), signed into law by President Trump on July 4, 2025, could soon reshape how much you can deduct from your federal taxes.
Introduced by House Republicans, one of the bill’s provisions phases out and eventually removes the current $10,000 cap on state and local tax (SALT) deductions. The changes to the SALT deduction cap, originally passed as part of the 2017 tax reforms, could significantly impact higher-income taxpayers relying heavily on SALT deductions as part of their tax mitigation strategy.
Let’s explore what you need to know about these changes and how effective financial planning can help you prepare and adjust your tax strategies to preserve more of your income.
Key Highlights of the SALT Cap Changes
- The SALT deduction cap increases to $40,000 in 2025 ($20,000 for married filing separately) but phases out above certain income thresholds.
- A 30% phaseout begins at $500,000 modified adjusted gross income (MAGI) for joint filers and fully reverts to the $10,000 cap at $600,000 MAGI.
- The expanded deduction and its phaseout limits will be increased 1% per year through 2029, but the deduction reverts back to a flat $10,000 cap in 2030.
- High-income earners under the phaseout thresholds, especially in high-tax states, are best positioned to benefit from the increased deduction.
- Itemized deductions may become more attractive than the standard deduction for eligible taxpayers.
- Strategic planning — especially around income timing and charitable giving — is essential to maximize the SALT deduction before it phases out.
What Is the SALT Deduction?
The SALT deduction lets taxpayers deduct certain state and local taxes, like property or state income taxes, from their federal taxable income. Historically, it’s been among the most valuable (if overlooked) tax deductions for higher-income earners in high-tax states. Currently capped at $10,000, the significant changes in the OBBBA increase the cap to $40,000, but with phaseout provisions for certain individuals.1
What the new SALT cap bill includes
The 2025 SALT deduction cap bill introduces a new income-based structure to replace the flat $10,000 limit established under the 2017 Tax Cuts and Jobs Act (TCJA). Beginning in 2025, the deduction cap increases to $40,000 (or $20,000 for married filing separately). However, the benefit begins to phase out for taxpayers with a modified adjusted gross income (MAGI) of more than $500,000, being reduced by 30% for each dollar above the threshold. Once a taxpayer’s MAGI reaches $600,000, the SALT deduction reverts to the original $10,000 cap.2 Also, the cap will revert to $10,000 in 2030 after yearly 1% increases in 2027, 2028 and 2029.
| Tax Year | Original SALT Cap | Proposed OBBBA Cap |
|---|---|---|
| 2024 | $10,000 | $10,000 |
| 2025 | $10,000 | $40,000 (married filing separately: $20,000) |
| 2026+ | $10,000 | $40,400*, increased 1% per year |
*Phased out for MAGI of more than $500,000 ($250,000 for married filing separately); reduced to $10,000 at $600,000 MAGI ($300,000 for married filing separately)
Timeline for implementation and phaseout
The updated SALT deduction limitation starts on January 1, 2025, and offers temporary relief for high earners — but not across the board. As we noted above, taxpayers with MAGI under $500,000 (or $250,000 if married filing separately) can claim the full $40,000 deduction. The benefit phases out at 30% for each dollar above the $500,000 MAGI mark until it hits the $10,000 floor for those earning $600,000 or more. The cap will add a 1% annual increase each year in 2027, 2028 and 2029 before reverting to the $10,000 limit in 2030.
Unlike the original TCJA SALT cap, which was set to expire in 2026,3 the OBBBA made the SALT cap permanent. Once the increased SALT deduction reverts back to $10,000 in 2030, this cap will remain. This makes taking advantage of the next five years important when navigating around the phaseout zone for HNW and UHNW filers who could see deductions shrink rapidly with even modest income increases.
How this change affects itemized vs. standard deductions
The new SALT cap structure could make itemizing more appealing for high-income earners who previously defaulted to the standard deduction. Those who fall below the $500,000 MAGI threshold could now deduct up to $40,000 in SALT payments next year, creating more value in combining those deductions with mortgage interest and charitable contributions. That’s not a negligible amount! However, those phased into the cap must carefully evaluate whether itemizing still results in greater tax savings.
This change reinforces the need for strategic tax planning for many high earners. Timing income, deferring bonuses or managing capital gains may help taxpayers stay under key thresholds and capture more value.
Who Benefits From the New SALT Deduction Cap?
The updated SALT deduction cap offers targeted relief but isn’t equal. The primary beneficiaries under this new framework are high-income earners, especially those in high-tax states, who fall just below the income phaseout thresholds — but whom does that include?
High earners below the MAGI phaseout
The biggest winners in this scenario are taxpayers whose MAGI falls under $500,000. They can take full advantage of this SALT deduction cap. And for individuals in high-tax states like California, New York or New Jersey, the expanded limit offers meaningful relief and more incentive to itemize deductions. This also creates new opportunities for multi-year planning across several income brackets.
Pilots and specialized professionals
Like with other specialized professionals, the OBBBA’s tax impact on airline pilots offers new incentives. Pilots are among those who stand to benefit from the new SALT deduction cap, especially if their earnings fluctuate annually. Those who manage their compensation timing can effectively stay under the threshold and enjoy the full deduction.
Small business owners and entrepreneurs
The OBBBA business tax changes are significant, too. Business owners in pass-through entities who report income on their individual returns can benefit, especially if they can manage their reported MAGI through retirement contributions, distribution timing or income deferral.
Offsets and Limitations of the SALT Deduction Cap
The updated SALT deduction cap increases potential savings for many, but it’s not without caveats (especially for high earners). Once a taxpayer’s MAGI exceeds $500,000, the deduction begins phasing out rapidly. By $600,000, the full benefit is lost and the SALT deduction reverts back to the original $10,000 cap. That phaseout can create a steep “benefit cliff,” where even modest income increases dramatically reduce deductibility.
Additionally, the new cap doesn’t change other tax thresholds like the alternative minimum tax (AMT), further eroding the value of state and local tax deductions for certain filers. For many high-income households, strategic planning around income timing and deduction bunching remain essential to maximize their benefits under the SALT deduction limitation.
SALT Cap Phaseout and Future Outlook
While the 2025 legislation expands the SALT deduction cap for most taxpayers, that relief won’t last indefinitely. The cap is indexed for inflation through 2029 but will revert to $10,000 in 2030 under the current law. This built-in sunset provision effectively phases out the enhanced deduction over time, complicating long-term tax planning for HNW and UHNW households.
Looking ahead, future legislative changes might once again reshape SALT deduction policy. Given the shifting political landscape and its budgetary impact, view the current structure as temporary and plan accordingly: use flexible, forward-looking strategies that account for the SALT cap’s eventual phaseout.
FAQs About the SALT Deduction Cap
What taxes are included in the SALT deduction cap?
The SALT deduction includes state and local income taxes, real estate taxes and sales taxes. Taxpayers can choose to deduct either income or sales tax (whichever is higher) but not both. These amounts are grouped under the same cap, meaning all eligible state and local taxes must fall within the deduction limit for any given year.
Can I still deduct property taxes under the SALT cap?
Yes. Property taxes remain deductible but count toward your overall SALT deduction limit. For example, if you paid $12,000 in property taxes but the cap is $10,000, only $10,000 is deductible unless you qualify for the higher limits starting in 2025. Under the updated SALT deduction limitation, filers below the MAGI threshold could deduct more, including full property tax amounts.
Can married couples deduct more than single filers under the SALT cap?
No. Starting in 2025, the updated SALT cap allows married couples filing jointly and single filers to deduct up to $40,000 in state and local taxes. Those that are married and filing separately are limited to $20,000 each..
What happens to the SALT deduction cap after 2025?
Beginning in 2026, the SALT deduction cap increases significantly but begins phasing out at a MAGI of $500,000. In addition, the deduction cap will increase by 1% in 2026 through 2029. Starting in 2030, the deduction limit drops back to $10,000. This drop makes the expanded window temporary and underscores the need to plan to capitalize on it while it lasts.
What This Means for Your Tax Strategy
The new SALT deduction cap means opportunities and challenges for those with high incomes and complex federal and state tax obligations. Evaluating your deductions just got a lot more nuanced, and tax-efficient charitable planning just became even more critical. Assessing income thresholds will likely become a part of your strategic plan to maximize these benefits while they last.
