Salt Deduction Calculation Example

Estimate your state and local tax (SALT) deduction based on your 2024 tax situation

Comprehensive Guide to SALT Deduction Calculation (2024)

The State and Local Tax (SALT) deduction allows taxpayers to deduct certain state and local taxes from their federal taxable income. This deduction can significantly reduce your tax burden, but it’s subject to important limitations. This guide explains everything you need to know about calculating your SALT deduction for the 2024 tax year.

What Qualifies for the SALT Deduction?

The SALT deduction encompasses several types of taxes paid to state and local governments:

• State and local income taxes – Includes withheld amounts from paychecks or estimated tax payments
• Real estate property taxes – Based on assessed value of your home or other real property
• Personal property taxes – Such as vehicle registration fees based on value
• State and local sales taxes – Either actual amounts paid or IRS standard deduction amounts

The $10,000 SALT Deduction Cap

Under the Tax Cuts and Jobs Act (TCJA) of 2017, the SALT deduction is limited to $10,000 per year for tax years 2018 through 2025. This cap applies to:

• Single filers and married couples filing separately: $10,000 maximum
• Married couples filing jointly: $10,000 maximum (not $20,000)
• Heads of household: $10,000 maximum

IRS Official Guidance:

The IRS provides detailed information about the SALT deduction limitation in Publication 5307 (Tax Reform Basics for Individuals and Families).

Calculating Your SALT Deduction Step-by-Step

1. Gather your tax documents – Collect W-2s, 1099s, property tax statements, and sales tax receipts
2. Sum your state income taxes – Add withheld amounts from paychecks plus any estimated payments
3. Add local income taxes – Include city or county income taxes if applicable in your jurisdiction
4. Include property taxes – Use the actual amount paid (not necessarily the assessed value)
5. Choose sales tax method – Decide between actual expenses or IRS standard deduction
6. Add other qualifying taxes – Include personal property taxes or foreign real property taxes
7. Apply the $10,000 cap – Your total deduction cannot exceed this amount

Sales Tax Deduction: Actual vs. Standard

Taxpayers have two options for claiming sales tax deductions:

Option	Description	Best For
Standard Sales Tax Deduction	IRS-provided amounts based on income, family size, and state	Most taxpayers (simpler, often higher)
Actual Sales Tax Deduction	Track and sum all sales tax paid during the year	High spenders on major purchases (vehicles, boats, etc.)

The IRS provides sales tax deduction tables in Publication 600 that show standard amounts by state and income level.

State-by-State SALT Impact Analysis

The SALT deduction cap affects taxpayers differently depending on their state’s tax structure. High-tax states see the most significant impact:

State	Avg Property Tax	Avg Income Tax	% Over SALT Cap
California	$4,100	$7,500	64%
New York	$8,200	$5,800	140%
New Jersey	$8,700	$4,200	129%
Texas	$3,800	$0	0%
Florida	$2,100	$0	0%

Source: Tax Policy Center (Urban Institute & Brookings Institution)

Strategies to Maximize Your SALT Deduction

• Bunching deductions – Alternate between standard and itemized deductions yearly
• Prepay property taxes – Pay January’s property tax bill in December when beneficial
• Charitable contributions – Increase giving to offset reduced SALT deductions
• Business deductions – Self-employed individuals can deduct SALT on Schedule C
• State-specific workarounds – Some states offer pass-through entity taxes as workarounds

Common SALT Deduction Mistakes to Avoid

1. Double-counting sales tax – Can’t claim both standard and actual sales tax
2. Including non-deductible taxes – License fees, federal taxes, and some local taxes don’t qualify
3. Forgetting the cap – Many taxpayers still claim amounts over $10,000
4. Incorrect property tax timing – Deduct only for the year actually paid
5. Missing documentation – Always keep receipts and tax statements

Future of the SALT Deduction

The current $10,000 cap is set to expire after 2025 unless Congress extends it. Several proposals have been discussed:

• Full repeal – Return to unlimited SALT deductions (unlikely)
• Higher cap – Increase to $15,000 or $20,000
• Marriage penalty fix – Double cap for joint filers to $20,000
• State-specific adjustments – Higher caps for high-tax states

The Build Back Better Act proposed increasing the cap to $80,000 through 2030, but this provision was ultimately removed from the final legislation.

Alternative Minimum Tax (AMT) Considerations

For high-income taxpayers, the SALT deduction may be limited or eliminated by the Alternative Minimum Tax (AMT). The AMT disallows state and local tax deductions when calculating alternative minimum taxable income. Taxpayers subject to AMT should:

• Calculate both regular tax and AMT liability
• Consider deferring state tax payments if subject to AMT
• Consult with a tax professional for optimization strategies

IRS AMT Resources:

Learn more about how AMT interacts with SALT deductions in IRS Tax Topic 556 (Alternative Minimum Tax).

State Workarounds to the SALT Cap

Several states have implemented workarounds to help taxpayers bypass the SALT deduction cap:

• Pass-Through Entity Taxes (PTET) – Businesses pay state tax at entity level, providing owners with federal deduction
• Charitable Fund Programs – Some states offer tax credits for donations to state-run charitable funds
• Employer-Side Payroll Taxes – Certain states allow employers to pay state taxes on behalf of employees

As of 2024, over 30 states have implemented some form of SALT cap workaround. The most common is the PTET approach, which has been approved by the IRS in Notice 2020-75.

Recordkeeping Requirements

Proper documentation is essential for claiming SALT deductions. The IRS requires:

• Form 1098 for mortgage interest and property taxes
• W-2 forms showing state tax withholding
• Receipts for sales tax deductions (if using actual method)
• Bank records for estimated tax payments
• Property tax bills and payment confirmations

Digital records are acceptable if they’re clear and legible. The IRS recommends keeping tax records for at least 3 years from the filing date, but 6 years is better for substantial deductions.

How the SALT Deduction Affects Homeownership

The SALT cap has had significant impacts on the housing market, particularly in high-tax states:

• Reduced incentive for homeownership – Higher property taxes provide less tax benefit
• Shift to renting – Some high-income earners choose to rent rather than buy
• Property value impacts – Homes in high-tax areas may see slower appreciation
• Mortgage interest deduction changes – Combined with lower mortgage limits, reduces homeownership benefits

A Brookings Institution study found that the SALT cap has contributed to increased housing inequality between high-tax and low-tax states.

SALT Deduction for Renters

While homeowners typically benefit more from SALT deductions, renters can also claim certain deductions:

• State and local income taxes – Same as homeowners
• Sales taxes – Either standard or actual amounts
• Personal property taxes – Such as vehicle registration fees

Renters cannot deduct rent payments as property taxes, but some states offer renter tax credits that may provide similar benefits.

International Considerations

U.S. citizens living abroad or owning foreign property should be aware of:

• Foreign real property taxes – Generally deductible under SALT rules
• Foreign income taxes – Claim as foreign tax credit instead of SALT deduction
• Tax treaties – May affect how foreign taxes are treated
• FBAR requirements – Foreign bank accounts over $10,000 must be reported

The IRS provides guidance on foreign tax issues in Publication 514 (Foreign Tax Credit for Individuals).

Professional Tax Help for SALT Deductions

Given the complexity of SALT deductions, especially for high-income taxpayers or those with multiple properties, professional tax advice can be valuable. Consider consulting a tax professional if:

• Your total SALT deductions exceed $10,000
• You own property in multiple states
• You’re subject to Alternative Minimum Tax
• You have complex state tax situations (e.g., non-resident returns)
• You’re considering state-specific SALT workarounds

A qualified tax professional can help optimize your deductions while ensuring compliance with all IRS rules and state-specific regulations.