Fully restoring the SALT deduction without any cap would cost approximately $1.2 trillion over the next decade, according to the Committee for a Responsible Federal Budget. While the Trump administration has not yet proposed complete elimination of the cap, it has already expanded it significantly through the “One Big Beautiful Bill Act,” increasing the deduction cap from $10,000 to $40,400 in 2026, with further increases through 2029 before it reverts to the original $10,000 limit in 2030. For a married couple in New York earning $500,000 annually and paying $50,000 in state and local property taxes, this expanded cap could allow them to deduct the full amount—whereas under the old $10,000 cap, they could only deduct $10,000 and would lose $40,000 in potential deductions.
The promise to “restore” the SALT deduction fully reflects a long-standing complaint from high-income taxpayers in high-tax states. However, a complete restoration—removing the cap entirely—would require spending roughly $140 billion over the next 10 years just to keep the current expansion in place, with far higher costs if the deduction were truly unlimited. This makes full restoration an expensive proposition at a time when federal deficits remain high, and it raises fundamental questions about who actually benefits from such tax changes and what tradeoffs the government would need to make elsewhere in the budget.
What Is the SALT Deduction and Why Is Trump Pushing to Expand It?
The SALT deduction allows taxpayers to deduct state and local income, sales, and property taxes from their federal taxable income. Before 2018, there was no limit on this deduction, meaning wealthy residents of high-tax states could deduct their entire state and local tax bills. The Tax Cuts and Jobs Act introduced a $10,000 annual cap on the total SALT deduction, which affected high earners in states like new York, California, New Jersey, and Connecticut most severely.
trump has positioned the expansion as relief for middle-class homeowners, but the data tells a different story. The Congressional Research Service and Tax Foundation analysis show that the vast majority of SALT deduction benefits flow to taxpayers earning more than $100,000 per year, with the largest benefits concentrated among those earning $500,000 or more. For example, a family earning $75,000 in annual income in a middle-tax state might save only $500 under the expanded cap, while a family earning $500,000 in New York could save $15,000 or more.
The Rising Cost of Expansion—From $140 Billion to $1.2 Trillion
The current expansion already carries a significant price tag. Under the Bipartisan Policy Center’s analysis, raising the SALT cap to $40,000 as of 2026, with 1% annual increases through 2029, will cost approximately $140 billion over 10 years. If the administration were to pursue true full restoration by eliminating the cap entirely, that cost would balloon to $1.2 trillion over a decade—roughly equivalent to the
Who Actually Benefits from the SALT Deduction Expansion?
The benefits of the expanded SALT deduction are heavily concentrated among high-income taxpayers in high-tax states. Residents of New York, California, New Jersey, Connecticut, Massachusetts, and Illinois—states with the highest state income and property taxes—capture a disproportionate share of the tax relief. According to Bloomberg reporting on 2026 tax refund data, taxpayers in these states saw average refunds approximately $350 higher than the prior year, with many high-income filers seeing refunds in the thousands of dollars.
The deduction begins to phase out at $500,000 modified adjusted gross income (MAGI) for married couples filing jointly, or $250,000 for married couples filing separately. This phase-out means that the ultra-wealthy cannot claim the full benefit of the expanded deduction. However, this high threshold still primarily affects the top 1-2% of earners. A middle-class homeowner in a moderate-tax state may see virtually no benefit from the expansion, while a $500,000-earning couple in Manhattan or San Francisco will see substantial tax savings.
The Temporary Nature of the Expansion—and What Happens in 2030
Perhaps the most overlooked aspect of Trump’s SALT deduction expansion is that it is not permanent. Under the current law, the SALT cap will automatically revert to the original $10,000 limit in 2030. This sunset provision creates a planning nightmare for taxpayers and policymakers alike. A high-earning couple who rely on the expanded deduction to manage their tax burden will face a sudden, significant increase in their federal tax liability in four years.
This temporary structure also means the expansion creates a false sense of relief. Taxpayers might adjust their finances or make decisions based on current deduction levels, only to face higher taxes in 2030 unless Congress acts to extend the expansion. Making the expansion permanent would require Congress to vote on it explicitly, and such a vote would likely draw attention to the true long-term cost: $1.2 trillion over a decade if the cap were eliminated entirely, or hundreds of billions more in revenue loss if expanded limits were made permanent. By making it temporary, the administration can claim tax relief while potentially avoiding the full political and fiscal scrutiny that comes with permanent tax cuts.
The Broader Tax Policy Tradeoff—Are There Better Uses for This Revenue?
The expansion of the SALT deduction represents a choice to prioritize tax relief for high earners in expensive real estate markets over other uses of government revenue. These tradeoffs are significant. The $140 billion spent over 10 years to fund the current expansion could alternatively fund substantial improvements to healthcare infrastructure, education, infrastructure repair, or deficit reduction.
For context, the entire annual budget of the National Institutes of Health is roughly $47 billion—meaning the SALT expansion costs more than three years of NIH funding. There is also a fairness question embedded in this policy. A teacher earning $65,000 annually in Kansas receives no benefit from the expanded SALT deduction, while a lawyer earning $400,000 in New York receives thousands of dollars in annual tax relief. From a tax policy perspective, this raises questions about horizontal equity—whether individuals with similar incomes should pay similar tax burdens regardless of where they live. Critics argue that the SALT deduction effectively subsidizes high-tax states, transferring wealth from taxpayers in lower-tax states to wealthier residents of high-tax jurisdictions.
Real-World Impact—What the Expansion Actually Means for Specific Taxpayers
To understand the practical impact of the SALT deduction expansion, consider two examples. A married couple in Houston earning $200,000 with $8,000 in property taxes under the original $10,000 cap would deduct the full $8,000. Under the expanded $40,400 cap, they still deduct $8,000—no change. Meanwhile, a married couple in San Francisco earning $400,000 with $35,000 in property taxes couldn’t deduct their full taxes under the old rules (limited to $10,000) but can now deduct $35,000 under the expanded cap.
That’s a $25,000 additional deduction, translating to roughly $6,500 in federal tax savings at the 26% marginal rate. According to Marketplace/NPR reporting, the average household saw refunds that were approximately $350 higher in 2026 compared to 2025 due to SALT expansion. However, this figure masks extreme variation. Some households saw refunds increase by thousands of dollars, while others saw minimal impact. The median household in the United States likely saw little benefit from this expansion, while the top 10% of earners saw substantial gains.
The Political and Fiscal Reality Ahead
As the sunset provision approaches in 2030, expect intense political pressure to extend the expansion. High-income taxpayers and real estate interests in expensive coastal states will lobby hard to make the expansion permanent. This lobbying will force Congress to confront the real fiscal cost of the policy—and likely require either significant spending cuts elsewhere or increases in other revenues to offset the cost.
The promise to “fully restore” the SALT deduction faces a simple mathematical reality: complete restoration would be unaffordable without major changes to spending or other revenues. The current expansion represents a middle ground—it provides substantial relief to high earners while maintaining enough fiscal constraint to fit within certain budget frameworks. Whether this expansion continues beyond 2030 will depend not on tax policy logic alone, but on political power and fiscal pressure. For now, taxpayers benefiting from the expansion should plan carefully for potential changes after 2029, and policymakers should understand that this temporary relief will require tough choices in just a few years.
Conclusion
Trump’s promise to restore the SALT deduction fully addresses a genuine complaint from high-income taxpayers in expensive states, but the fiscal cost of complete restoration—$1.2 trillion over a decade—makes it politically and economically unrealistic. The current expansion under the “One Big Beautiful Bill Act” raises the cap to $40,400 in 2026 with annual increases through 2029, costing roughly $140 billion over 10 years. While this provides meaningful tax relief for high earners in high-tax states, the benefits are heavily skewed toward the top 1-2% of earners, and the expansion automatically expires in 2030.
Taxpayers and policymakers should understand that this policy involves real tradeoffs. Every dollar spent expanding the SALT deduction is a dollar not available for other priorities, and the concentration of benefits among wealthy coastal residents raises fairness questions. As 2030 approaches, Congress will face a critical decision: extend the expansion and formally acknowledge its trillion-dollar cost, or allow it to expire and impose a sudden tax increase on high earners. The answer will depend less on tax policy analysis and more on political pressure and fiscal realities at that time.
