For seven years, homeowners in California, New York, New Jersey, Illinois, and Connecticut watched a single tax rule cost them thousands of dollars every year.
The Tax Cuts and Jobs Act of 2017 capped the State and Local Tax (SALT) deduction at $10,000 — regardless of what you actually paid in state income taxes and property taxes combined.
A New Jersey homeowner paying $18,000 in property taxes and $14,000 in state income taxes could deduct only $10,000 of their $32,000 SALT bill. The other $22,000 produced zero federal tax benefit.
That changed on July 4, 2025, when the One Big Beautiful Bill Act (OBBBA) quadrupled the SALT cap to $40,000 for 2025. For 2026, it rises to $40,400 — with annual 1% increases through 2029.
This single change may be the most valuable tax development in your financial life since 2017 — if you know how to use it. For how this fits into your complete financial picture, see our personal financial planning framework.
What Is the SALT Deduction and How Did It Change?
Quick Answer: The SALT deduction lets itemizers subtract certain taxes paid to state and local governments from federal taxable income — including state income taxes (or sales taxes in no-income-tax states) and property taxes. The OBBBA raised the annual cap from $10,000 to $40,000 for 2025, $40,400 for 2026, with 1% annual increases through 2029. In 2030, the cap reverts to $10,000 unless Congress acts before then.
| Tax Year | SALT Cap (Single & Joint) | SALT Cap (Married Filing Separately) | Phase-Out Starts at MAGI |
|---|---|---|---|
| 2018–2024 (TCJA) | $10,000 | $5,000 | No phase-out |
| 2025 (OBBBA) | $40,000 | $20,000 | $500,000 |
| 2026 | $40,400 | $20,200 | $505,000 |
| 2027 | $40,804 | $20,402 | $510,050 |
| 2029 | $41,624 | $20,812 | $520,302 |
| 2030+ (Reversion) | $10,000 | $5,000 | No phase-out |
Who Benefits Most from the SALT Cap Increase?
Quick Answer: The SALT cap increase provides the greatest benefit to homeowners in high-tax states — primarily California, New York, New Jersey, and Illinois — who pay more than $10,000 in combined state income taxes and property taxes and have MAGI below $500,000 ($505,000 in 2026). Renters in states with no income tax benefit least. The change is most impactful for middle and upper-middle income homeowners who itemize or now should consider itemizing.
Real Example — New Jersey Married Homeowners
Married couple in New Jersey, combined income $200,000, MAGI $190,000:
- State income taxes paid: $18,000
- Property taxes paid: $14,000
- Total SALT: $32,000
Under old TCJA cap (2024): SALT deductible = $10,000. Deduction lost = $22,000.
Under new OBBBA cap (2025/2026): SALT deductible = $32,000 (full amount, under the $40,000 cap). Additional deduction gained = $22,000. At 24% tax bracket: additional federal tax savings = $5,280 per year.
That is $5,280 of real money returned — purely from understanding and claiming a deduction you were already entitled to but previously capped out of using.
The MAGI Phase-Out — When the Deduction Shrinks
Quick Answer: The expanded SALT deduction phases out for high earners. In 2026, the phase-out begins at MAGI of $505,000 for single filers and joint filers. The deduction is reduced by 30 cents for every dollar of MAGI above the threshold. The deduction has a floor equal to the original $10,000 TCJA cap — it cannot drop below $10,000 regardless of income. Filers with MAGI above approximately $605,000 in 2026 effectively remain at the $10,000 cap.
Phase-Out Calculation Example — 2026
Single filer, MAGI $555,000, $35,000 SALT paid:
- MAGI over threshold: $555,000 − $505,000 = $50,000
- Phase-out reduction: $50,000 × 30% = $15,000
- Adjusted cap: $40,400 − $15,000 = $25,400
- SALT deductible: lesser of $35,000 or $25,400 = $25,400
- Still significantly better than the previous $10,000 cap
Additional 2026 note for 37% bracket filers: According to Fidelity, the value of itemized deductions for those in the 37% federal tax bracket will be capped at 35 cents per dollar deducted in 2026 — slightly reducing but not eliminating the SALT benefit at the very highest income levels.
Should You Now Itemize Your Deductions?
Quick Answer: In 2026, you should itemize if your total itemized deductions — SALT plus mortgage interest, charitable contributions, and other eligible expenses — exceed the standard deduction ($16,100 for single, $32,200 for joint filers in 2026). For many homeowners in high-tax states who previously could not benefit from itemizing under the $10,000 cap, the expanded SALT cap now makes itemizing clearly superior. Compare your specific numbers before deciding.
| Your Situation | Recommendation | Reason |
|---|---|---|
| Homeowner in CA, NY, NJ, IL with significant property taxes and state income tax | Itemize | SALT alone may approach or exceed $16,100 standard deduction |
| Homeowner with large mortgage interest plus high SALT payments | Itemize | Combined deductions likely far exceed standard deduction |
| Renter in low-tax state (TX, FL, WA) with no state income tax | Standard | SALT limited to property taxes if renting; likely below threshold |
| MAGI above $605,000 single or joint in 2026 | Evaluate carefully | At full phase-out — SALT reverts to $10,000; compare all itemized deductions to standard |
The 2030 Reversion — Plan Now While the Window Is Open
Quick Answer: The SALT cap expansion is temporary. It reverts from $40,000+ back to $10,000 starting in the 2030 tax year unless Congress passes new legislation before then. This creates a five-year planning window from 2025 through 2029. Homeowners in high-tax states should use this window to maximize SALT-related deductions, consider property tax payment timing strategies, and evaluate business entity structures that may provide additional state tax deduction benefits.
This temporary window creates specific planning opportunities:
- Property tax timing: California property taxes are due in two installments. Paying the February installment in December instead of delaying to April shifts a deduction into the earlier tax year, potentially maximizing the year with the higher SALT benefit.
- Pass-Through Entity (PTE) tax election: Business owners operating as S-corporations or partnerships should evaluate whether California, New York, New Jersey, or Illinois PTE tax elections still provide additional savings alongside the expanded federal SALT cap.
- Charitable bunching: Combining two years of charitable contributions into one year — paired with the expanded SALT cap — can maximize total itemized deductions significantly above the standard deduction in alternating years.
For the companion guide covering the other major OBBBA tax change, see our complete OBBBA overtime tax deduction 2026 guide. For how both changes fit into your personal finance glossary understanding, visit our personal finance glossary.
Trusted Sources:
- TurboTax — Quadrupling the SALT Deduction: New Rules for 2026 — turbotax.intuit.com
- Fidelity — What Is the SALT Deduction 2026 — fidelity.com
- H&R Block — OBBBA SALT Deduction Changes for Homeowners — hrblock.com
- SmartAsset — SALT Deduction Changes Explained 2025-2026 — smartasset.com
- IRS.gov — Standard Deduction and Itemized Deductions 2026
Disclaimer: This article provides general educational information about the SALT deduction cap based on OBBBA provisions current as of April 2026. Tax laws may change. This is NOT tax advice. The decision to itemize depends on your complete individual tax situation. Consult a qualified tax professional, CPA, or enrolled agent for personalized guidance. Verify current rules at IRS.gov.
