SALT Deduction: State & Local Tax Deduction Cap Explained (2026)

A Tale of Two Tax Years: Why the SALT Cap Matters

Consider a household in Bergen County, New Jersey with an adjusted gross income of $280,000. They own a home assessed at $650,000, generating annual property taxes of $16,400. They also pay $21,000 in New Jersey state income tax. Total SALT payments: $37,400.

Under the 2024 rules, that household could only deduct $10,000 of those $37,400 in taxes — leaving $27,400 on the table. At a 32% marginal rate, that is $8,768 in permanently lost tax savings every year.

In 2026, the same household can deduct up to $40,400. Their entire $37,400 in SALT is now fully deductible. At 32%, that is an $11,968 federal tax reduction — a swing of more than $8,700 compared to 2024.

This is why the SALT deduction was the most politically contentious provision of the One Big Beautiful Bill Act, and why understanding the new rules is critical for taxpayers in high-tax states. Use our Income Tax Calculator to see how the new cap affects your specific situation.

What the SALT Deduction Covers

"SALT" stands for State and Local Taxes. The deduction, claimed on Schedule A (Form 1040), covers three categories — but with a critical choice embedded within them:

1. State and Local Income Taxes

If you live in a state with an income tax, you can deduct the state and local income taxes you paid during the year on Schedule A, Line 5a. This includes:

• State income taxes withheld from your W-2 wages (Box 17)
• State estimated tax payments made during the year
• Prior-year state tax refund that you did not claim as income (complex rules apply — see IRS Publication 525)
• Local income taxes (city, county) withheld from W-2 wages (Box 19)

Important: A state tax refund you receive this year is generally taxable income if you deducted the original payment last year. This is the "tax benefit rule" under IRC §111.

2. State and Local Sales Taxes (as an alternative)

Each year, you can choose to deduct state and local sales taxes instead of income taxes. You cannot deduct both. This option benefits taxpayers in states with no income tax (Florida, Texas, Nevada, Washington, and others) or those who made major purchases subject to high sales tax.

You have two ways to calculate your deductible sales taxes: (a) track actual receipts throughout the year, or (b) use the IRS Optional Sales Tax Tables in IRS Publication 600, which calculate an estimate based on your income, state, and family size. Most taxpayers use the tables and then add actual sales tax paid on major purchases (cars, boats, home renovations) on top.

3. Real Property Taxes

You can deduct real property taxes levied by state or local governments on real estate you own. This is Schedule A, Line 5b. For homeowners, this typically means your annual property tax bill. Key rules:

• You must own the property — renters cannot deduct their landlord's property taxes
• The tax must be based on the value of the property (ad valorem), not a flat fee
• Taxes paid at closing are deductible in the year paid (the HUD-1 settlement statement shows your share)
• Property taxes on vacation homes, investment properties, and second homes count toward your SALT cap
• Special assessments for local improvements (sidewalks, sewers) generally do not qualify — they are not based on property value

The $10,000 Cap History and 2026 Changes

Before 2018, the SALT deduction was unlimited. The Tax Cuts and Jobs Act (TCJA) capped it at $10,000 per return ($5,000 for married filing separately) effective for tax years 2018–2025. The impact was dramatic: according to the Congressional Research Service (R46246), the share of taxpayers claiming a SALT deduction fell from 31% in 2017 to just 9% in 2022 — a direct result of fewer taxpayers having SALT exceeding the standard deduction.

The One Big Beautiful Bill Act, signed in 2025, raised the cap to $40,000 for 2025 and indexed it upward by 1% per year through 2029. The 2026 cap is therefore $40,400. Beginning in 2030, the cap reverts to $10,000 unless Congress extends the higher limit.

The cost of the higher SALT cap is significant: the Bipartisan Policy Center estimates the change adds approximately $140 billion to the deficit over 10 years compared to keeping the $10,000 cap in place. That explains the controversial income-based phase-out included to limit benefits for the highest earners.

2026 SALT Cap: Amounts and Phase-Out Rules

How the phase-out works: For every dollar of MAGI above $505,000, your available SALT cap is reduced by 30 cents — a steep reduction. A taxpayer with $550,000 MAGI has $45,000 of excess income above the threshold. Their cap is reduced by 30% × $45,000 = $13,500, leaving a cap of $40,400 − $13,500 = $26,900. The cap cannot fall below $10,000 regardless of income.

At approximately $605,000 MAGI, the full phase-out kicks in and the cap collapses to the $10,000 floor. High-income taxpayers in this bracket see minimal benefit from the OBBBA SALT expansion.

Taxes That Do NOT Qualify for SALT

Not every government-imposed charge is deductible as SALT. Common exclusions that trip up taxpayers:

• Federal income taxes — never deductible on your federal return
• Foreign taxes — use Form 1116 Foreign Tax Credit instead
• Transfer taxes / real estate excise tax — paid when buying or selling property; add to cost basis instead
• Homeowners association (HOA) fees — private assessments, not government taxes
• Special assessments for local improvements (new road, sewers serving your property) — not ad valorem
• Vehicle registration based on weight or horsepower — only the portion based on value qualifies
• Self-employment taxes — deducted above-the-line on Schedule 1, not as SALT
• Per-capita taxes — flat fees not based on property value

Car registration fees deserve a closer look. Many states charge a fee with a component based on the vehicle's value plus a flat fee. Only the ad valorem portion is deductible as personal property tax under SALT. Check your registration statement for the value-based breakdown.

How to Claim the SALT Deduction: Step by Step

The SALT deduction lives on Schedule A (Form 1040), Lines 5–6. Here is the exact filing process:

Step 1: Choose income taxes OR sales taxes. Tally your state and local income taxes (from W-2 Box 17, Box 19, and estimated tax payment records) and compare to your estimated sales taxes (from receipts or IRS tables). Choose whichever is higher. Enter on Schedule A, Line 5a (income taxes) or Line 5b (sales taxes).

Step 2: Add real property taxes. Sum all property tax bills paid during 2026 on your primary home, vacation home, and any other real estate. Enter on Schedule A, Line 6. If taxes were impounded in your mortgage, check your annual escrow statement — not your 1098, which only shows mortgage interest.

Step 3: Add personal property taxes. Include the ad valorem portion of vehicle registration and any other personal property taxes on Line 5c.

Step 4: Apply the $40,400 cap. Sum Lines 5a (or 5b), 5c, and 6. Enter the total on Line 5d, but cap it at $40,400 ($20,200 for MFS). Apply the phase-out calculation if your MAGI exceeds $505,000.

Step 5: Confirm itemizing beats the standard deduction. Add your total Schedule A deductions (SALT + mortgage interest + charitable donations + medical expenses). If the total exceeds $16,100 (single) or $32,200 (MFJ), itemizing saves you money. Use our standard deduction vs. itemized guide for a detailed comparison with worked examples.

SALT Deduction by State: Who Benefits Most

The geography of the SALT deduction is stark. According to the Tax Policy Center, residents of five states — New York, California, New Jersey, Connecticut, and Illinois — account for a disproportionate share of total SALT deductions claimed. Taxpayers in these states routinely pay more in combined state income and property taxes than the old $10,000 cap allowed.

Taxpayers in states with no income tax (Texas, Florida, Nevada, Tennessee, South Dakota, Wyoming, Washington) generally pay lower overall SALT, though high property taxes in Texas can still push totals well above $10,000 for homeowners in major metro areas. See our no-income-tax states guide for the full comparison.

The PTET Workaround for Business Owners

S corporation owners and partners in partnerships face a particularly frustrating SALT problem: the $10,000 (now $40,400) cap applies at the individual level, but the business generates state income tax liability that can dwarf the cap. A business owner earning $500,000 through an S-corp in a high-tax state might owe $50,000+ in state income taxes alone.

The pass-through entity tax (PTET) workaround, blessed by the IRS in Notice 2020-75, allows eligible pass-through entities to elect to pay state income tax at the entity level. Because business taxes paid at the entity level are fully deductible as business expenses on the federal return (not subject to the individual SALT cap), owners effectively bypass the cap entirely.

Nearly all high-tax states now offer PTET elections: California (AB 150), New York, New Jersey, Connecticut, Illinois, Massachusetts, and dozens of others. The mechanics vary by state — some require an annual election by a certain deadline, others allow retroactive elections. For business owners with state tax exposure above the $40,400 individual cap, the PTET remains valuable even with the higher 2026 ceiling. Consult your CPA before the election deadline; missing it costs you the entire benefit for that year.

SALT and the Marriage Penalty

One of the most criticized features of the original TCJA SALT cap was that the $10,000 limit was not doubled for married couples. A single taxpayer and a married couple both faced the same $10,000 ceiling — meaning marriage effectively cut the SALT deduction in half for two-income households with high state tax bills.

The OBBBA maintains this marriage-penalty structure. The 2026 SALT cap is $40,400 for both single and married joint filers. Married couples who would have been able to deduct $60,000–$80,000 in SALT (combining two individual deductions) under a doubled cap are still limited to $40,400 jointly. This primarily affects upper-middle-income dual-income households in high-tax states.

If you are considering whether to file jointly or separately to maximize SALT, run the numbers carefully. Filing separately means a $20,200 SALT cap per spouse — potentially $40,400 combined — but married filing separately also triggers higher tax rates, eliminates several credits, and disqualifies you from the student loan interest deduction. The math rarely favors splitting. Use our married filing jointly vs. separately guide for a full analysis.

Strategies to Maximize Your SALT Deduction

1. Prepay Fourth-Quarter State Estimated Taxes in December

If your fourth-quarter state estimated tax payment is due January 15, consider paying it in December instead. You deduct SALT in the year you pay it, so an early payment shifts the deduction into the prior year. This only works if you will itemize in that prior year — and the IRS has been clear that prepaying income taxes (not property taxes) only into the period for which they apply generally qualifies.

2. Bunch Itemized Deductions Every Other Year

If your SALT plus other itemized deductions hover near the standard deduction threshold, bunching is a powerful strategy. Concentrate deductible expenses (prepay property taxes, make two years of charitable donations in one year) into alternating years to exceed the standard deduction. In off years, take the standard deduction. See the full bunching methodology in our standard vs. itemized deductions guide.

3. Choose the Higher of Income vs. Sales Tax

Do this calculation every year — it can swing by thousands of dollars. If you purchased a car, boat, RV, or made major home improvements, your actual sales tax may significantly exceed the IRS table amount. Track large-ticket purchases throughout the year. Even in states with income taxes, the sales tax deduction can win if you made major purchases.

4. Appeal Your Property Tax Assessment

Now that the SALT cap is $40,400, you might wonder whether it still makes sense to fight your property assessment. Here is the nuance: if you are above the SALT cap, a lower assessment saves you money in property taxes paid, but that lower tax payment also reduces your SALT deduction. Below the cap, a lower assessment reduces both your tax bill and your deduction — the net savings is the reduced tax multiplied by (1 − your marginal rate). The appeal is still worth pursuing if your assessment is genuinely higher than fair market value. Our property tax appeal guide walks through the process.

SALT Under Different Scenarios: What You Can Actually Deduct

Frequently Asked Questions

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