STRATEGY PAPERNEW

2026 SALT Cap for Homebuyers: $40,400 Limit Explained

The tax change that shifts your rent-vs-buy math.
Last reviewed March 2026 · DwellQ Research8 SOURCES

Key Findings

012026 SALT cap: $40,400 per household (up from $10,000), with 1% annual increases through 2029
02Phase-out begins at $500,000 MAGI: limit drops $0.30 per dollar of excess income, floor of $10,000
03NJ homebuyer at $150K MAGI saves ~$2,064/year more than under the old cap (~$62K over 30yr mortgage)
04High earners ($650K+ MAGI) may see zero additional benefit—phase-out pushes limit to $10,000 floor
05Severe-impact states: NY, NJ, CA, CT, IL; minimal-impact states: FL, TX, NV, WY
06Cap reverts to $10,000 in 2030 unless Congress extends—model both scenarios for long-term planning

What Changed in 2026

The SALT deduction cap increased from $10,000 to $40,400 for the 2026 tax year, with annual 1% increases through 2029. This is a temporary expansion of the Trump-era TCJA cap that’s been in place since 2017. The SALT deduction bundles property tax and state income tax into one limit. Critical detail: unless Congress extends it, the cap reverts to $10,000 in 2030. This matters for long-term financial planning—if you’re buying with a 30-year mortgage, your tax benefit may shrink significantly in four years.

The Phase-Out for Higher Earners

The base $40,400 limit phases out for households above $500,000 modified adjusted gross income (MAGI). For every dollar over $500,000, the SALT limit drops by $0.30, with a floor of $10,000. A household with $600,000 MAGI loses $30,000 from the base cap ($100,000 excess × $0.30), bringing their limit to $10,400. A household at $650,000 MAGI hits the phase-out hard: $150,000 excess × $0.30 = $45,000 reduction, pushing the limit to the $10,000 floor—identical to the old cap. This is why higher earners in expensive states sometimes see no SALT cap relief at all.

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Concrete Example: New Jersey Homebuyer

A homebuyer at $150,000 MAGI purchasing a $600,000 home in NJ: annual property tax at 2.2% is $13,200; NJ state income tax ~$5,400. Total SALT deduction: $18,600 (well under the $40,400 limit). At the 24% federal bracket, that’s ~$4,464/year in tax savings. Under the old $10,000 cap, property tax consumed the entire allowance with zero state income tax deduction, yielding only $2,400/year. The new cap produces $2,064/year in additional savings—about $62,000 in present value over a 30-year mortgage at 4% discount rate.

High Earner Scenario: Manhattan ($650K MAGI)

Combined property tax and state income tax: ~$85,000/year. But at $650,000 MAGI, the phase-out pushes the SALT limit down to the $10,000 floor—identical to the old cap. Federal tax savings at 35% bracket: ~$3,500/year, same as before. The new cap provides zero additional benefit for this high earner. This is a critical nuance: the $40,400 headline number does not help everyone equally. Your actual SALT deduction depends on your exact income, property location, state tax bracket, and filing status.

Which States Feel the Pain Most

Tier 1 (Severe Impact): New York, New Jersey, California, Connecticut, Illinois—all have high combined property taxes and state income taxes that easily exceeded the old $10,000 limit. The new $40,400 cap provides significant relief for middle-income homeowners in these states. Tier 2 (Moderate Impact): Maryland, Massachusetts, Vermont, New Hampshire—combinations of state income tax and property tax can exceed the old cap. Tier 3 (Minimal Impact): Florida, Texas, Nevada, Wyoming—no state income tax means property tax is the only SALT concern, and it rarely approaches $40,400.

The 2030 Cliff and What to Do About It

The SALT cap increase is temporary. Unless Congress acts, it reverts to $10,000 in 2030. Real estate advocacy groups (NAR, NAHB) are lobbying for extension but no certainty exists. If you’re buying now with a 30-year mortgage, the tax benefit you calculate today may shrink significantly in four years. This is why modeling multiple scenarios—including ‘what if the cap goes back to $10K’—is prudent. DwellQ’s Q+ tax modeling accounts for the SALT cap automatically, running your specific income, state, and property details through current 2026 tax rules.

Impact by State

Estimated annual tax savings at 24% marginal rate · MAGI under $500K
StateTotal SALTOld CapNew CapSavings
New York$22K+$10K$22K$2,880/yr
New Jersey$20K+$10K$20K$2,400/yr
California$18K+$10K$18K$1,920/yr
Connecticut$16K$10K$16K$1,440/yr
Illinois$14.5K$10K$14.5K$1,080/yr
Florida$5.5K$5.5K$5.5K$0
Texas$9K$9K$9K$0
THE BOTTOM LINE
The $40,400 SALT cap helps middle-income homeowners in high-tax states significantly—but higher earners hit the phase-out quickly, and the expansion sunsets in 2030. Don’t assume it helps you equally. Run your specific numbers: your state, your property price, your income. DwellQ’s Q+ platform models all of this automatically.

Frequently Asked Questions

Does the $40,400 SALT cap apply to everyone?+
The base limit is $40,400, but it phases out for households above $500,000 MAGI. At $600K MAGI, your limit drops to $10,400. At $650K+, it floors at $10,000—the same as the old cap. Run your specific income scenario to see your actual limit.
What happens when the SALT cap expires in 2030?+
Unless Congress passes an extension, the cap reverts to $10,000 per household—the same limit from 2017–2025. This means your federal tax benefits could drop significantly. If you’re buying now, factor this into your long-term financial plan.
Does the SALT cap matter in states with no income tax?+
Less so. In Florida, Texas, Nevada, and Wyoming, property tax is your only SALT deduction. Most homeowners in these states have total SALT well below $40,400, so the cap increase provides little additional benefit.
Can I split SALT deductions across spouses?+
No. The $40,400 limit is per household, not per individual. You cannot split deductions, double-deduct in different years, or deduct property taxes above the cap through any workaround.
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RELATED ANALYSIS
How the 2025 SALT Cap Changes Affect Rent vs BuyTax Implications of Buying vs RentingBest Cities for First-Time Buyers in 2026
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METHODOLOGY
DwellQ research uses a net worth comparison framework. Both paths—buying (building equity minus all ownership costs) and renting (investing the down payment plus monthly surplus)—are modeled month-by-month over the full holding period. Assumptions are documented, sensitivity-tested, and sourced from publicly available data. This is scenario analysis, not financial advice.
SOURCES & REFERENCES
  1. One Big Beautiful Bill Act, H.R. 1, 119th Congress (2025). SALT Cap Provisions.
  2. IRS. Publication 5307: Tax Reform Basics for Individuals and Families.[irs.gov]
  3. Tax Foundation. SALT Deduction: Overview and Analysis of Cap Proposals.[taxfoundation.org]
  4. Congressional Budget Office. Effects of SALT Deduction Cap on Federal Revenue.[cbo.gov]
  5. National Association of Realtors. SALT Cap Impact on Homeownership Costs.[nar.realtor]
  6. Zillow Research. Median Home Values by State and Metro.[zillow.com/research]
  7. Federal Reserve Bank of St. Louis. FRED: State and Local Tax Revenue Data.[fred.stlouisfed.org]
  8. Joint Center for Housing Studies, Harvard. The State of the Nation’s Housing, 2024.[jchs.harvard.edu]