2026 SALT Cap for Homebuyers: $40,400 Limit Explained
Key Findings
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.
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. Be careful how far you carry that forward: undiscounted over thirty years it looks like $61,920, but discounted at 4% it is about $35,691 — and if the cap sunsets on schedule in 2030, the benefit is four years long and worth roughly $7,492 in present value. Model it as a four-year benefit unless Congress extends.
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 the statutory SALT schedule. One detail worth knowing: because a tax year’s deduction reaches you when you file the following spring, the engine treats simulation year one as the tax year AFTER the current calendar year — a run started in 2026 applies the 2027 cap of $40,804 to its first year, and steps one year up the schedule for each year after that.
What It Actually Does to Break-Even
A lower after-tax cost of ownership pulls the break-even month forward, but by less than the headline savings suggest. In the high-tax states the expanded cap shortens break-even by roughly 6–16 months, with the largest effect in New York City and northern New Jersey (12–16 months) and effectively none in Texas, Florida, or Washington, where total SALT never reached the old $10,000 limit in the first place. There is a second-order effect worth naming: a bigger cap pushes more owners over the standard deduction and into itemizing at all, which is what turns the mortgage-interest deduction from a theoretical benefit into a real one. Even so, this is a timing adjustment, not a reversal — appreciation, opportunity cost on the down payment, and selling costs remain the dominant variables in the rent-vs-buy verdict, and a SALT change that moves break-even by a year does not move a decision that was not already close.
Impact by State
Frequently Asked Questions
- One Big Beautiful Bill Act, H.R. 1, 119th Congress (2025). SALT Cap Provisions.
- IRS. Publication 5307: Tax Reform Basics for Individuals and Families.[irs.gov ↗]
- Tax Foundation. SALT Deduction: Overview and Analysis of Cap Proposals.[taxfoundation.org ↗]
- Congressional Budget Office. Effects of SALT Deduction Cap on Federal Revenue.[cbo.gov ↗]
- National Association of Realtors. SALT Cap Impact on Homeownership Costs.[nar.realtor ↗]
- Zillow Research. Median Home Values by State and Metro.[zillow.com/research ↗]
- Federal Reserve Bank of St. Louis. FRED: State and Local Tax Revenue Data.[fred.stlouisfed.org ↗]
- Joint Center for Housing Studies, Harvard. The State of the Nation’s Housing, 2024.[jchs.harvard.edu ↗]
- Bipartisan Policy Center. How Does the 2025 Tax Law Change the SALT Deduction?[bipartisanpolicy.org ↗]
- Joint Committee on Taxation. Distributional Analysis of SALT Provisions.[jct.gov ↗]
- IRS. Publication 936: Home Mortgage Interest Deduction.[irs.gov ↗]