SALT Deduction Cap: The $10,000 State and Local Tax Limit Explained

The SALT deduction cap is one of the most debated provisions of the 2017 Tax Cuts and Jobs Act. Before the TCJA, taxpayers who itemized could deduct the full amount of their state and local taxes — income tax, property tax, sales tax — with no ceiling. Starting in 2018, the law capped that deduction at $10,000 ($5,000 for married filing separately). For taxpayers in high-tax states, the cap means thousands of dollars in lost deductions every year.

Key Takeaways

• The SALT deduction covers state/local income tax (or sales tax), property tax, and personal property tax.
• The TCJA caps the combined SALT deduction at $10,000 ($5,000 MFS) through 2025.
• The cap primarily affects itemizers in high-tax states like California, New York, New Jersey, and Connecticut.
• Pass-through entity tax (PTET) elections in 30+ states can bypass the cap for business owners.
• The SALT cap is scheduled to expire after 2025 unless Congress extends it.

What Taxes Does SALT Include?

The state and local tax deduction covers three categories of taxes you pay to state, county, and municipal governments:

1. State and Local Income Taxes

The withholding on your paycheck, estimated tax payments, and any balance due on your state income tax return. This is the largest SALT component for most wage earners and high-income filers.

Or, alternatively:

1a. State and Local Sales Taxes

You can elect to deduct sales taxes instead of income taxes (but not both). This benefits taxpayers in states with no income tax — like Texas, Florida, Washington, and Nevada — who pay significant sales tax. The IRS provides optional sales tax tables or you can track actual receipts.

2. Real Property Taxes

Property taxes on your home, land, and other real estate you own. Assessed annually by your county or municipality.

3. Personal Property Taxes

Taxes assessed on the value of personal property such as vehicles, boats, or other tangible assets. Not all states impose these.

What SALT Does NOT Include

• Foreign taxes (claimed separately via the foreign tax credit)
• Fees, assessments, and charges for specific services (trash collection, water, sewer)
• Transfer taxes or mortgage recording taxes
• Estate or inheritance taxes
• Taxes paid on business property (those go on Schedule C or other business forms)

The $10,000 Cap

The cap applies to the combined total of all SALT categories. If you pay $8,000 in property tax and $12,000 in state income tax, your total SALT is $20,000 — but you can only deduct $10,000.

Before the TCJA, that same taxpayer would have deducted the full $20,000, saving an additional $2,400 to $3,960 depending on their marginal rate.

Who Is Affected Most?

The SALT cap disproportionately affects taxpayers who:

• Live in high-tax states: California, New York, New Jersey, Connecticut, Illinois, and Maryland filers are among the hardest hit
• Own expensive homes: Higher property values mean higher property tax bills
• Have high incomes: Higher earnings mean more state income tax
• Itemize deductions: The cap only matters if you itemize on Schedule A

A Concrete Example

Maria lives in New Jersey, earns $200,000, and owns a home assessed at $600,000.

Tax	Amount
NJ state income tax	~$12,400
Property tax (NJ average ~2.2%)	~$13,200
Total SALT	$25,600
Deductible under TCJA	$10,000
Lost deduction	$15,600

At a 32% federal bracket, Maria loses roughly $4,990 in federal tax savings every year because of the cap.

Impact by State

States where the average SALT exceeds $10,000 per household:

Workarounds and Strategies

1. Pass-Through Entity Tax (PTET) Election

The most effective workaround for business owners. Over 30 states now allow S corporations, partnerships, and LLCs taxed as pass-through entities to elect to pay state income tax at the entity level instead of the individual level.

How it works:

1. The business entity pays state income tax directly
2. The entity deducts the tax payment as a business expense (not subject to the $10,000 cap)
3. The owner receives a state tax credit on their personal return

The IRS confirmed in Notice 2020-75 that entity-level state taxes are deductible by the entity without limitation. This effectively sidesteps the SALT cap for pass-through business income.

Available in: California, New York, New Jersey, Connecticut, Illinois, Maryland, Georgia, and 25+ other states. Check your state’s Department of Revenue for details.

Who benefits: Self-employed individuals, S corporation shareholders, partners in partnerships, and LLC members. W-2 employees cannot use this workaround. Couples filing jointly should evaluate whether the PTET election benefits their combined return.

2. Timing Strategies

If the SALT cap sunsets in 2026, consider deferring property tax payments from late 2025 to early 2026, when they would be fully deductible. However, some jurisdictions require timely payment to avoid penalties, so check your local rules.

Similarly, if you make estimated state tax payments, consider timing the payments to maximize deductions in the year where they provide the most benefit.

3. Income Tax vs. Sales Tax Election

If you live in a no-income-tax state, elect the sales tax deduction. Large purchases (cars, boats, building materials) can push your sales tax deduction close to or beyond the $10,000 cap — but you capture value from the election that income-tax-state residents cannot.

4. Charitable Contributions Instead of SALT

Since the SALT deduction is capped but charitable deductions are not (up to 60% of AGI for cash), some taxpayers redirect funds from additional state tax payments toward charitable giving. Charitable bunching with a donor-advised fund can amplify this approach.

5. Relocating or Establishing Residency

Some high-income taxpayers have relocated from high-tax states to no-income-tax states (Florida, Texas, Nevada, Wyoming). While extreme, this eliminates state income tax entirely — far more impactful than any SALT workaround.

The SALT Cap and the Standard Deduction

The TCJA simultaneously raised the standard deduction and capped SALT. This combination pushed millions of former itemizers onto the standard deduction:

If your total itemized deductions (SALT + mortgage interest + charitable + medical) do not exceed the standard deduction, the SALT cap has no practical effect on you because you would take the standard deduction anyway.

What Happens When the TCJA Sunsets

The $10,000 SALT cap is part of the TCJA’s individual provisions that are scheduled to expire after 2025. If Congress does not act:

• The SALT cap disappears: Taxpayers can deduct unlimited state and local taxes starting in 2026
• The standard deduction drops: Reverting to approximately half of current levels (though personal exemptions return)
• More taxpayers itemize again: With a lower standard deduction and unlimited SALT, itemizing becomes beneficial for many more filers
• Tax rates increase: Higher marginal rates make each dollar of SALT deduction more valuable

For high-tax-state filers, the TCJA sunset could actually improve their tax situation even though rates go up, because the uncapped SALT deduction may more than offset the rate increase.

Planning for Either Outcome

Since Congress may extend, modify, or let the SALT cap expire, smart planning means:

• Keep records of all state and local taxes paid
• Evaluate the PTET election annually if you own a business
• Consider the timing of property tax and estimated tax payments around the 2025/2026 boundary
• Model your tax liability under both scenarios

How sharper.tax Helps

When you upload your tax return to sharper.tax, our platform calculates your total SALT exposure and shows exactly how the $10,000 cap affects your federal tax liability. We identify whether you would benefit from itemizing versus the standard deduction, flag PTET eligibility for business owners, and model how the TCJA sunset would change your numbers. Instead of generic advice, you get analysis based on your actual return data.

Related Guides

• Schedule A Itemized Deductions — line-by-line walkthrough of the form where SALT is reported
• Standard Deduction vs. Itemizing — how to decide which filing method saves you more
• TCJA Sunset: 2026 Tax Changes — what happens to the SALT cap and other provisions after 2025
• State Income Tax Guide — how each state taxes income and where SALT hits hardest
• Property Tax Calculator — estimate your property tax bill and its impact on your SALT total
• Charitable Giving Strategies — use uncapped charitable deductions to offset lost SALT value

Sources

• IRS: State and Local Tax Deduction (Schedule A)
• IRS Notice 2020-75: Pass-Through Entity Tax Deductibility
• IRS: Optional State Sales Tax Tables
• Tax Foundation: SALT Deduction Analysis

The information above is educational and not tax advice.