The State and Local Tax (SALT) deduction is a federal tax benefit that allows taxpayers to deduct certain taxes paid to state and local governments from their taxable income. While it has been part of the U.S. tax system for decades, recent law changes have made it more limited—and more important to understand—than ever before.

What Is the SALT Tax Deduction?

The SALT deduction lets taxpayers who itemize their deductions subtract specific state and local taxes from their federal taxable income. By lowering taxable income, the deduction can reduce the amount of federal income tax you owe.

The types of taxes you can include under SALT are:

• State income taxes (or state sales taxes, if you choose this option instead)
• Local income taxes (such as city taxes)
• Property taxes on real estate, like your home

For example, if you pay state income tax and property tax during the year, those amounts may be eligible for deduction—subject to certain limits.

How Does the SALT Deduction Work?

The SALT deduction works by reducing your taxable income when you file your federal tax return. However, there are two key conditions:

1. You must itemize your deductions
   You can only claim SALT if you choose to itemize deductions instead of taking the standard deduction. Itemizing is beneficial when your total deductions exceed the standard deduction amount.
2. You are subject to a deduction cap
   Currently, the SALT deduction is capped at $10,000 per year per household.

This means:

• If you’re a single filer, you can deduct up to $10,000
• If you’re married filing jointly, the limit is still $10,000 total
• If married filing separately, each spouse can deduct up to $5,000

Understanding the $10,000 SALT Cap

One of the most important aspects of the SALT deduction is the cap introduced by the Tax Cuts and Jobs Act (TCJA) of 2017.

Before this law, there was no strict limit on how much you could deduct for state and local taxes. Many taxpayers—especially those in high-tax states—were able to deduct tens of thousands of dollars.

Now, even if your total state and local taxes exceed $10,000, you cannot deduct anything beyond that limit.

Example:
Let’s say you paid:

• $8,000 in state income tax
• $7,000 in property tax

Your total SALT payments = $15,000
Your deductible amount = $10,000 (due to the cap)

The remaining $5,000 cannot be deducted.

Choosing Between Income Tax and Sales Tax

When claiming the SALT deduction, you have a choice:

• Deduct state income taxes, or
• Deduct state sales taxes

You cannot deduct both.

Most taxpayers choose to deduct state income taxes. However, deducting sales tax may be beneficial if:

• You live in a state with no income tax
• You made large purchases during the year (such as a car or home renovation materials)

The IRS provides tables to estimate sales tax deductions, but you can also track actual expenses if you prefer.

Who Benefits Most from the SALT Deduction?

The SALT deduction tends to benefit certain groups more than others:

1. High-income earners
They typically pay more in state income taxes and are more likely to itemize deductions.

2. Homeowners
Property taxes can significantly increase total deductible taxes.

3. Residents of high-tax states
States like California, New York, and New Jersey often have higher income and property taxes, making it easier to reach the $10,000 cap.

Who Benefits Less?

Because of the cap and higher standard deduction, many taxpayers benefit less from SALT than they did in the past.

You may see limited or no benefit if:

• Your total deductions don’t exceed the standard deduction
• Your state taxes are relatively low
• You are a renter with no property tax payments

In fact, millions of taxpayers now take the standard deduction instead of itemizing, meaning they don’t use SALT at all.

SALT Deduction vs. Standard Deduction

To use the SALT deduction, you must itemize your deductions. This is where many taxpayers face a decision.

The standard deduction is a fixed amount you can subtract from your income without listing expenses. It has increased significantly in recent years.

You should itemize only if your total deductions—including SALT, mortgage interest, charitable donations, and medical expenses—exceed the standard deduction.

If they don’t, taking the standard deduction will result in greater tax savings.

Planning Strategies to Maximize SALT Benefits

Even with the $10,000 cap, there are ways to make the most of the SALT deduction:

1. Combine deductions strategically
You may be able to “bunch” deductible expenses into one year to exceed the standard deduction threshold.

2. Time property tax payments
In some cases, paying property taxes earlier or later can help optimize deductions.

3. Explore pass-through entity (PTE) taxes
Some states allow business owners to pay taxes at the entity level, which may bypass SALT limits.

4. Keep accurate records
Maintain documentation of all tax payments to ensure you claim the full allowable deduction.

What’s the Future of the SALT Deduction?

The current $10,000 cap is scheduled to remain in effect through 2025 unless new legislation changes it. There has been ongoing debate about whether to:

• Increase the cap
• Eliminate it entirely
• Replace it with a different system

Because of this uncertainty, taxpayers should stay informed about potential changes that could affect future filings.

Final Thoughts

The SALT tax deduction remains a valuable—but limited—tool for reducing federal taxable income. While it once offered substantial benefits to many taxpayers, the current cap has reduced its impact, especially for those in high-tax areas.

Understanding how the SALT deduction works is essential for making smart tax decisions. Whether you benefit depends on your income, location, property ownership, and overall deductions.

Before filing your taxes, take the time to evaluate whether itemizing makes sense for you and how the SALT cap affects your situation. With proper planning, you can still use this deduction effectively as part of a broader tax strategy.