State And Local Tax SALT Deduction

The State and Local Tax (SALT) deduction has long been one of the most significant deductions available to individual taxpayers who itemize on their federal returns. This deduction generally allows you to deduct certain taxes paid to state and local governments, including income taxes, property taxes, and sales taxes. However, the Tax Cuts and Jobs Act (TCJA) of 2017 introduced a $10,000 cap on SALT deductions that remains in effect for tax years through 2025, fundamentally changing the calculus for millions of taxpayers. Understanding how the SALT deduction works, its current limitations, and strategies for maximizing its value is essential for effective tax planning.

Key Takeaways

• The SALT deduction is currently capped at $10,000 ($5,000 for married filing separately) for tax years 2018 through 2025, covering the combined total of state and local income taxes (or sales taxes) plus property taxes.
• Only itemizers benefit from the SALT deduction. With the elevated standard deduction for 2024 ($14,600 single, $29,200 married filing jointly), many taxpayers may find that itemizing no longer provides a greater benefit.
• The SALT cap is scheduled to expire after 2025 unless Congress acts to extend, modify, or make it permanent, creating significant uncertainty for long-term tax planning.
• Pass-through entity (PTE) tax elections in many states may allow business owners to effectively circumvent the SALT cap, though eligibility and rules vary significantly by state.
• High-tax state residents are disproportionately affected by the SALT cap, and careful planning around the timing and type of deductible taxes can still yield meaningful savings.

What Qualifies as a SALT Deduction?

The SALT deduction, as outlined in IRS Publication 17 and further detailed in the instructions for Schedule A (Form 1040), generally encompasses three categories of state and local taxes:

State and Local Income Taxes

Taxpayers may typically deduct state and local income taxes that were withheld from wages, estimated tax payments made during the year, and amounts paid when filing a prior-year state or local return. For 2024, this includes any state income tax payments made to your state of residence or to states where you earned income. According to the Tax Foundation’s 2024 data, state individual income tax rates range from zero (in states like Florida, Texas, and Nevada) to as high as 13.3% in California, meaning the value of this deduction varies enormously depending on where you live.

State and Local General Sales Taxes

As an alternative to deducting state and local income taxes, taxpayers may instead choose to deduct state and local general sales taxes. This option is generally more beneficial for residents of states that impose no income tax but do levy sales taxes. The IRS provides optional sales tax tables (found in the instructions for Schedule A) to simplify the calculation, though taxpayers may also use actual receipts if they maintained detailed records throughout the year.

Real Estate and Personal Property Taxes

State, local, and foreign real estate taxes assessed on property you own are typically deductible. Personal property taxes (such as annual vehicle registration fees based on the value of the vehicle) also generally qualify. However, taxes assessed for local benefits that increase the value of property (such as sidewalk assessments) are usually not deductible as SALT. Per IRS Publication 530, only the portion of real estate taxes that qualifies as a deductible tax may be included.

The $10,000 SALT Cap: How It Works

The TCJA imposed a $10,000 aggregate limit on SALT deductions beginning in tax year 2018. This cap applies to the combined total of all deductible state and local taxes, not to each category individually.

Filing Status	SALT Deduction Cap (2024)	Standard Deduction (2024)
Single	$10,000	$14,600
Married Filing Jointly	$10,000	$29,200
Married Filing Separately	$5,000	$14,600
Head of Household	$10,000	$21,900

It is worth noting that the $10,000 cap is not indexed for inflation, meaning its real value has decreased since 2018. According to analysis from the Tax Foundation, the SALT cap affected approximately 10.9 million tax returns in recent filing years, with the majority of affected taxpayers concentrated in high-tax states such as New York, New Jersey, California, Connecticut, and Illinois.

Practical Example: Impact of the SALT Cap

Consider a married couple filing jointly in 2024 who lives in New Jersey. They pay $14,000 in state income taxes and $12,000 in property taxes, for a total of $26,000 in state and local taxes. Under pre-TCJA rules, they could have deducted the full $26,000. Under the current cap, they may only deduct $10,000, losing the benefit of $16,000 in deductions. At a 24% marginal federal tax rate, this represents approximately $3,840 in additional federal tax liability compared to the pre-cap scenario.

Who Benefits Most from the SALT Deduction?

The SALT deduction generally provides the greatest benefit to taxpayers who meet several criteria:

• Reside in states with high income tax rates or high property values
• Have enough total itemized deductions to exceed the standard deduction
• Are in higher federal marginal tax brackets, where each dollar of deduction yields greater tax savings

According to the Tax Policy Center’s analysis, approximately 90% of the benefit of the SALT deduction accrues to taxpayers with incomes above $100,000, making it one of the more regressive provisions in the tax code. The Brookings Institution has similarly noted that the deduction disproportionately benefits higher-income households.

Strategies for Navigating the SALT Cap

Pass-Through Entity Tax Elections

One of the most significant developments since the SALT cap was enacted involves pass-through entity (PTE) tax elections. As of 2024, more than 30 states have enacted PTE tax regimes that allow S corporations, partnerships, and in some cases LLCs to pay state income taxes at the entity level rather than on the individual owners’ returns. Because entity-level taxes are generally treated as business deductions rather than individual SALT deductions, they typically bypass the $10,000 cap. The IRS confirmed the validity of this approach in Notice 2020-75.

For example, if a taxpayer owns a 50% interest in an S corporation that earns $400,000 in a state with a 5% income tax rate, the entity might elect to pay $20,000 in state taxes at the entity level. The taxpayer’s share ($10,000) would generally reduce their federal pass-through income as a business expense, avoiding the SALT cap entirely. However, the rules and mechanics differ substantially by state, and not all business structures or income types may qualify.

Timing of Tax Payments

Taxpayers may sometimes benefit from carefully timing their state and local tax payments. For instance, if you anticipate being in a lower tax bracket in a future year, or if the SALT cap is modified, accelerating or deferring payments could prove advantageous. However, it is important to note that the IRS addressed “prepayment” strategies in early 2018 (IRS Advisory IR-2017-210), clarifying that prepaying 2018 state income taxes in 2017 was not deductible unless the taxes had already been assessed. Property taxes that were assessed and paid early, by contrast, were generally allowed.

Choosing Between Income Tax and Sales Tax Deduction

Taxpayers in states with no income tax (such as Florida, Texas, Washington, Nevada, Wyoming, Alaska, and South Dakota) may benefit from electing the sales tax deduction instead. This election is made annually on Schedule A, and the IRS provides sales tax calculators and tables to estimate deductible amounts. In some cases, large purchases (vehicles, boats, or building materials) can significantly increase the sales tax deduction, though the total still remains subject to the $10,000 SALT cap.

Charitable Contributions to State Programs

Some states offer tax credits for contributions to certain state-sponsored programs (such as scholarship funds or conservation programs). However, the IRS finalized regulations in 2019 (T.D. 9864) requiring taxpayers to reduce their charitable deduction by the amount of any state or local tax credit received in return. If the credit is 15% or less of the contribution, a safe harbor allows the full charitable deduction. This effectively limits the ability to convert SALT payments into charitable deductions for amounts above the safe harbor threshold.

Audit Risks and Common Mistakes

While the SALT deduction is a mainstream and widely used tax benefit, there are several areas where errors can trigger IRS scrutiny:

• Exceeding the $10,000 cap: Claiming more than $10,000 in total SALT deductions (or $5,000 for married filing separately) is one of the most common errors and may generate automated IRS notices.
• Deducting non-qualifying taxes: Federal taxes, foreign income taxes claimed as a credit, and taxes paid for local benefits (such as water or sewer assessments) are generally not deductible as SALT. Misclassifying these can result in adjustments.
• Double-counting refunds: If you received a state tax refund and deducted state taxes in the prior year, the refund may need to be included as income under the tax benefit rule (reported on Schedule 1, Line 1). Failing to report taxable state refunds is a known audit trigger.
• Incorrectly claiming PTE tax benefits: As PTE tax elections are relatively new and vary by state, incorrect implementation could result in disallowed deductions at either the federal or state level.
• Mixing income and sales tax deductions: You generally cannot deduct both state income taxes and state sales taxes in the same year. Choosing one precludes the other, and claiming both is an error that will typically be flagged.

The Future of the SALT Deduction

The $10,000 SALT cap is currently scheduled to expire after December 31, 2025. If the TCJA provisions sunset as written, the unlimited SALT deduction would return for tax year 2026 and beyond. However, significant legislative uncertainty surrounds this issue.

As of early 2025, various proposals in Congress have ranged from permanently repealing the SALT cap to raising it to $20,000, $50,000, or $80,000, with some proposals including income-based phase-outs. The bipartisan SALT Caucus in the House of Representatives has pushed for relief, while fiscal hawks have pointed to the estimated revenue cost of repealing the cap, which the Joint Committee on Taxation has projected at roughly $800 billion to $1.2 trillion over ten years depending on the specific proposal.

For tax planning purposes, relying on the assumption that the cap will expire or be modified carries inherent risk. Taxpayers in high-tax states may want to consider multiple planning scenarios.

SALT Deduction by State: A Comparative View

The impact of the SALT cap varies dramatically by state. The following table illustrates the typical combined SALT burden for a hypothetical household earning $200,000 with a home valued at $500,000, based on 2024 Tax Foundation data on state income tax rates and median effective property tax rates:

State	Estimated State Income Tax	Estimated Property Tax	Total SALT	Amount Exceeding Cap
New Jersey	$11,400	$11,700	$23,100	$13,100
California	$14,200	$3,700	$17,900	$7,900
New York	$12,000	$8,550	$20,550	$10,550
Illinois	$9,900	$10,850	$20,750	$10,750
Texas	$0	$8,600	$8,600	$0
Florida	$0	$4,300	$4,300	$0

As the table illustrates, taxpayers in states like New Jersey and New York may lose the benefit of more than $10,000 in deductions annually, while taxpayers in no-income-tax states like Texas and Florida may remain under the cap entirely.

Special Considerations

Alternative Minimum Tax (AMT) Interaction

Under the AMT, SALT deductions are completely disallowed. This means that even before the TCJA cap, taxpayers subject to AMT received no benefit from SALT deductions. For 2024, the AMT exemption amounts are $85,700 for single filers and $133,300 for married filing jointly (per IRS Revenue Procedure 2023-34). Taxpayers near these thresholds may find that the SALT deduction provides limited or no incremental benefit even within the $10,000 cap.

Moving Between States

Taxpayers who relocate during the tax year may need to file part-year returns in multiple states and should carefully track which taxes are deductible and when. State taxes paid to one state on income earned in that state are generally deductible in the year paid, regardless of when you moved. However, complexities arise with estimated payments, final return payments, and property taxes on homes sold or purchased mid-year.

Foreign Property Taxes

Beginning with tax year 2018, the TCJA eliminated the deduction for foreign real property taxes. Taxes paid on property located outside the United States are generally no longer deductible as part of the SALT deduction. This change also remains in effect through 2025 and would revert if the TCJA provisions expire.

Data Sources

• IRS Publication 17 (Your Federal Income Tax for Individuals), 2024 edition, covering general rules for itemized deductions including SALT
• IRS Publication 530 (Tax Information for Homeowners), 2024 edition, detailing deductible real estate taxes
• IRS Schedule A (Form 1040) Instructions, 2024, including sales tax tables and SALT deduction guidance
• IRS Notice 2020-75, regarding the federal income tax treatment of specified income tax payments by pass-through entities
• IRS Advisory IR-2017-210, addressing prepayment of state and local taxes
• Treasury Decision (T.D.) 9864, final regulations on contributions in exchange for state and local tax credits
• IRS Revenue Procedure 2023-34, inflation adjustments for tax year 2024 including AMT exemption amounts and standard deductions
• Tax Foundation, “State Individual Income Tax Rates and Brackets for 2024” and “Property Taxes by State” (2024 data)
• Tax Policy Center, “Distribution of the SALT Deduction,” Urban-Brookings analysis
• Joint Committee on Taxation (JCT), revenue estimates related to SALT cap modification proposals (2024-2025 session)