MKS Instruments Employees and the New California SALT Deduction Boost

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'MKS Instruments employees navigating California’s high property taxes should view the new SALT deduction cap as an opportunity to revisit whether itemizing or taking the standard deduction provides the most benefit, and making that comparison now can help them plan ahead with greater clarity.' – Wesley Boudreaux, a representative of The Retirement Group, a division of Wealth Enhancement.

'MKS Instruments employees and retirees should recognize that the higher SALT deduction cap creates a chance to reevaluate household tax strategies, but the true value will depend on income thresholds, property taxes, and whether itemized deductions outweigh the standard deduction.' – Patrick Ray, a representative of The Retirement Group, a division of Wealth Enhancement.

In this article, we will discuss:

1. How the 2025 spending bill changes the SALT deduction cap for California homeowners.

2. The impact of Proposition 13, income thresholds, and itemized deductions on potential savings.

3. What MKS Instruments employees and retirees should consider when comparing itemized deductions versus the standard deduction.

With the passage of the 2025 One Big Beautiful Bill Act, the cap on state and local tax (SALT) deductions increased, positioning millions of taxpayers nationwide to see relief on their federal tax returns. With some of the largest state and local tax burdens in the nation, California homeowners—including many MKS Instruments employees—will be especially affected by the shift. Still, it's unclear how much Californians could save.

Before 2017, the entire amount of state and local taxes paid could be subtracted from a taxpayer's federal taxable income. With the 2017 Tax Cuts and Jobs Act, which set a $10,000 deduction cap, this was altered. ¹  Residents in high-tax areas like California, where taxes and property values often exceed national norms, were disproportionately impacted by the cap, creating challenges for MKS Instruments families with significant home values.

Potential Savings

Although the ceiling is not completely removed by the new 2025 legislation, it is replaced with an income-based cap that permits deductions of up to $40,000, contingent on a taxpayer's earnings. ²  The change may give many homeowners a meaningful advantage, but the benefits may differ depending on income, house value, and mortgage balance, according to Kevin Won of Wealth Enhancement's California office, which frequently works with MKS Instruments employees.

The deduction power that Californians in high-tax districts lost in 2017 could now be partially restored, according to Won. 'But under the new income thresholds, people with higher incomes might still see their SALT benefit phased out.' This is particularly relevant for MKS Instruments retirees and mid-career employees navigating compensation and property costs in high-value regions.

Redfin data shows the possible savings. Instead of the $10,000 cap, the average California homeowner can now deduct about $26,000 in SALT payments. ³  This could result in a $4,000 decrease in federal taxes at a marginal tax rate of 24%. ³  However, not every taxpayer—including those in the MKS Instruments workforce—will qualify for the entire benefit.

Unequal Application

A significant factor in the outcome is California's distinct property tax structure, which was influenced by Proposition 13. Long-term homeowners frequently pay lower property taxes than new buyers because Proposition 13 restricts annual increases in property tax assessments. According to Won, 'many Californians will not see the same percentage savings as newer buyers or residents of other states because Proposition 13 keeps long-term homeowners’ property taxes artificially low,' an important distinction for MKS Instruments employees with decades of homeownership.

The extended deduction may help around three-quarters of California homeowners, according to research. ³  But the only people who are likely to see major tax reductions are those who have large itemized deductions that surpass the standard deduction threshold. For many MKS Instruments professionals, the standard deduction might still be the better choice depending on their household situation.

Won suggested, 'It's still wise to run the numbers. To find out which approach works best, compare your new itemized deductions to the standard deduction.' MKS Instruments families approaching retirement may want to evaluate both options carefully.

Understanding the Nuances

In the end, the increased SALT cap gives Californians more flexibility, but the effects will differ greatly. 'It's a positive change, especially for upper-middle-income homeowners,' Won summed up. However, the impact may be minimal for long-term property owners or retirees with lower property taxes and smaller mortgages, a scenario that may apply to MKS Instruments retirees who have owned property for decades.

There is one important change: taxpayers 65 and older may claim an extra $6,000 tax deduction for tax years 2025–2028, regardless of whether they itemize. ⁴  Phase-outs begin at $75,000 of income for single filers and $150,000 for joint filers. ⁴  Together with the increased SALT cap modification, this senior deduction may expand older homeowners' tax relief—something MKS Instruments retirees should pay particular attention to.

Find out how California homeowners will be affected by the 2025 increase in the state and local tax (SALT) deduction cap. Typical property owners might save almost $4,000 in federal taxes under the new law, which increases the threshold from $10,000 to an income-based ceiling of up to $40,000. Discover why newer owners in high-tax districts may benefit the most, as well as how eligibility is influenced by Proposition 13, mortgage amounts, and itemized versus standard deductions, which are key considerations for many MKS Instruments employees.

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California's recent SALT deduction extension is comparable to reopening a long-blocked road lane. The 2017 limits forced traffic into fewer lanes for years, which reduced mobility and caused congestion. A portion of that lost lane has been reopened by the 2025 amendments, which permit deductions of up to $40,000, potentially reducing thousands of dollars in federal taxes. Similar to the freeway's continued speed limitations and restrictions, Proposition 13, income requirements, and itemized deduction laws limit the amount of benefit that homeowners may actually receive, making it easier for some but not for others—including many in the MKS Instruments workforce.

Sources:

1. Congress.gov. ' The SALT Cap: Overview and Analysis .' 3 Apr. 2025.

2. Bipartisan Policy Center. “ SALT Deduction Changes in the One Big Beautiful Bill Act ,” by Fredrick Hernandez, 30 July 2025.

3. Redfin News. “ Homeowners in New York, California and Other Coastal States Could Shave Thousands Off Their Annual Tax Bill with SALT Cap Increase ,' by Mark Worley, Asad Khan. 18 Sept. 2025.

4. IRS. ' One, Big, Beautiful Bill provisions: Deduction for Seniors (Sec. 70103) '. 2025.