For homeowners in high-tax states, one of the most consequential — and most confusing — pieces of the 2025 tax overhaul is the SALT deduction cap increase. Since 2018, the federal deduction for state and local taxes was frozen at a flat $10,000, regardless of how much someone actually paid in property and state income tax. That cap has now nearly quadrupled — but with a catch that trips up a lot of higher earners. This guide breaks down exactly how much you can deduct in 2026, who the income phase-out actually affects, and how long this window of relief is expected to last.
SALT Deduction Cap Increase 2026 – What Homeowners Need to Know
📑 Table of Contents
📊 What Changed: $10,000 to $40,400
| Filing Status | Old Cap (2018–2024) | 2025 Cap | 2026 Cap |
|---|---|---|---|
| Single / MFJ / Head of Household | $10,000 | $40,000 | $40,400 |
| Married Filing Separately | $5,000 | $20,000 | $20,200 |
The 2017 Tax Cuts and Jobs Act (TCJA) first introduced the $10,000 SALT cap in 2018, hitting homeowners in high-tax, high-property-value states (like New York, New Jersey, California, and Illinois) especially hard. The One Big Beautiful Bill Act (OBBBA), signed July 2025, raised that cap to $40,000 starting in 2025, with a built-in 1% annual increase for 2026 through 2029 — bringing the 2026 figure to $40,400 (TurboTax, confirmed across multiple 2026 tax guides).
🧾 What Counts as SALT
The SALT deduction bundles together several types of state and local taxes, available only to taxpayers who itemize on Schedule A instead of taking the standard deduction:
- State and local income taxes — or, if you elect it instead, state and local general sales taxes (you must choose one or the other, not both).
- Real property taxes — on your primary residence, a vacation home, or other real estate you own.
- Personal property taxes — such as annual vehicle registration taxes based on value, in states that charge them.
Taxes that don't qualify include federal taxes, most licensing fees, and taxes tied to a business or rental activity (those are deducted separately as business expenses, not personal SALT).
📉 The Income Phase-Out Explained
This is the part that catches many higher-income homeowners off guard: the new, larger cap isn't available in full to everyone. Once your Modified Adjusted Gross Income (MAGI) exceeds $505,000 in 2026 ($252,500 for Married Filing Separately), the cap is reduced by 30 cents for every dollar of MAGI above that threshold — but it never drops below the old $10,000 floor ($5,000 for MFS). At roughly $605,000–$606,000 MAGI, the phase-out is complete and the cap simply reverts to the pre-OBBBA $10,000 level.
🧾 Worked Examples
| Scenario | 2026 MAGI | SALT Cap Available |
|---|---|---|
| Middle-income homeowner | $150,000 | Full $40,400 (no phase-out) |
| Upper-middle-income dual-earner couple | $550,000 | $40,400 − (30% × $45,000) = $26,900 |
| High earner | $650,000 | $10,000 (fully phased out to the floor) |
For the $550,000 example: MAGI exceeds the $505,000 threshold by $45,000, so the cap is reduced by 30% × $45,000 = $13,500, leaving $40,400 − $13,500 = $26,900 in allowable SALT deduction — still more than double the old $10,000 cap, just not the full amount.
📅 The Full 2025–2030 Timeline
| Year | Cap (Single/MFJ) | Phase-Out Starts At |
|---|---|---|
| 2025 | $40,000 | $500,000 MAGI |
| 2026 | $40,400 | $505,000 MAGI |
| 2027–2029 | Rises ~1%/year | Rises ~1%/year |
| 2030 onward | Reverts to $10,000 | No phase-out (flat cap for all incomes) |
This is a genuinely temporary provision — unless Congress passes another extension before 2030, the cap snaps back to the original $10,000 TCJA level, and the income-based phase-out disappears entirely along with it (TurboTax). This five-year window makes near-term tax planning — like the timing of large property tax prepayments — unusually relevant for the next few years.
⚠️ The AMT Trap
Even if you clear the regular SALT phase-out, the Alternative Minimum Tax (AMT) is a separate, parallel tax calculation that can claw back much of the benefit. On Form 6251, your entire SALT deduction is added back to income when computing AMT — meaning high earners who owe AMT may see little to no real-world benefit from the higher SALT cap, since the AMT calculation ignores SALT deductions altogether. If you're near the phase-out range, it's worth running both a regular and AMT calculation before assuming you'll capture the full benefit.
🤔 Should You Itemize in 2026?
With the SALT cap so much higher, more taxpayers than in recent years may find itemizing worthwhile again. Compare your total itemized deductions (SALT + mortgage interest + charitable giving + other eligible items) against the 2026 standard deduction:
| Filing Status | 2026 Standard Deduction |
|---|---|
| Single / MFS | $16,100 |
| Married Filing Jointly | $32,200 |
| Head of Household | $24,150 |
If your property taxes alone already approach or exceed $10,000–$15,000 — common in high-tax states — combined with mortgage interest and charitable giving, itemizing under the new $40,400 cap is very likely to beat the standard deduction for many homeowners who previously found itemizing pointless under the old $10,000 cap.
❓ Frequently Asked Questions
$40,400 for single, married filing jointly, and head of household filers ($20,200 for married filing separately) — up from $40,000 in 2025 due to a built-in 1% annual increase running through 2029.
Taxpayers with 2026 MAGI above $505,000 ($252,500 for married filing separately). The cap reduces by 30 cents for every dollar above that threshold, reaching the old $10,000 floor at roughly $605,000–$606,000 MAGI.
State and local income taxes (or sales taxes, if elected instead), real property taxes on homes you own, and certain personal property taxes like value-based vehicle registration fees. Federal taxes and most business-related taxes don't count.
No. The increased cap and the income phase-out both apply only from 2025 through 2029. Starting in 2030, the cap is scheduled to revert to the original $10,000 ($5,000 MFS) TCJA level with no phase-out, unless Congress passes a further extension.
Yes. The Alternative Minimum Tax adds your entire SALT deduction back to income when calculating AMT liability. High earners who owe AMT may see reduced or no net benefit from the higher SALT cap, even if their MAGI is below the regular phase-out threshold.
It depends on your total itemized deductions versus the 2026 standard deduction ($16,100 single, $32,200 MFJ, $24,150 HoH). Homeowners with significant property taxes and mortgage interest are more likely to benefit from itemizing under the new $40,400 cap than they were under the old $10,000 limit.
Estimate your federal tax refund including the new SALT cap and other OBBBA changes.
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📚 References
This article is compiled from official IRS guidance and leading tax publications, current as of publication:
- IRS Newsroom — Tax Law Updates
- TurboTax — Quadrupling the SALT Deduction: What the New Rules Mean for You
- Anchin — SALT Deduction Cap Under OBBBA: Impact on High Earners
- Levy — SALT Deduction 2026: Cap, Phaseouts and Rules
- QuinetCalc Tax Refund Estimator — updated for 2026 SALT figures
This article is for general informational purposes only and does not constitute tax advice. SALT rules involve complex income phase-outs and AMT interactions — consult a licensed CPA or the official IRS.gov guidance before making filing or tax-planning decisions.
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