What the SALT deduction is

The SALT deduction lets you subtract state and local taxes you paid from your federal taxable income. SALT stands for state, local, and territorial taxes. The deduction covers four types of taxes: income tax (or sales tax, if you choose), property tax, and local taxes like city income tax or school district levies. You can only claim this deduction if you itemize deductions on your federal return instead of taking the standard deduction.

The federal government created this deduction because it recognizes that you pay taxes to multiple levels of government. Without it, your federal tax would be calculated on income that already went to your state and local governments. The deduction reduces the "double taxation" effect — though it does not eliminate it entirely.

There is a $10,000 annual cap on the total SALT deduction per taxpayer. This means even if you paid $15,000 in state income tax and $8,000 in property tax, you can only deduct $10,000 combined. Married couples filing jointly can deduct up to $10,000 total, not $10,000 each. This cap has been in place since 2018 and is scheduled to expire at the end of 2025, though Congress may extend it.

Key Takeaways

  • The SALT deduction covers state income tax (or sales tax), property tax, and local taxes, but is capped at $10,000 per year for all filers.
  • You can only use the SALT deduction if you itemize deductions; most taxpayers use the standard deduction instead and get no benefit from SALT.
  • If you live in a high-tax state or own property with high property taxes, you are more likely to benefit from itemizing and claiming SALT.
  • The $10,000 cap applies per taxpayer, so a married couple filing jointly cannot deduct $10,000 each — they share one $10,000 limit.

How SALT fits into itemizing versus the standard deduction

To use the SALT deduction, you must itemize deductions on Schedule A of Form 1040. Itemizing means you list out specific deductions — SALT, mortgage interest, charitable donations, and a few others — and add them up. You then compare that total to the standard deduction. If your itemized deductions exceed the standard deduction, you itemize. If not, you take the standard deduction instead.

The standard deduction for 2024 is $14,600 for single filers and $29,200 for married couples filing jointly. These amounts increase slightly each year. Most taxpayers find that the standard deduction is larger than their itemized deductions, so they never benefit from SALT. You need enough other deductions — typically mortgage interest or substantial charitable donations — to push your itemized total above the standard deduction threshold.

This is why SALT primarily helps people in high-tax states who own homes with significant mortgages. A homeowner in New York or California paying $8,000 in state income tax and $6,000 in property tax might reach $14,000 in itemized deductions when combined with mortgage interest, making itemization worthwhile. A renter in a low-tax state with $5,000 in state income tax would not.

Which taxes count toward SALT and which do not

The SALT deduction covers four categories. First, state and local income tax — the tax withheld from your paycheck or paid when you file your state return. Second, property tax on real estate you own, whether a home, rental property, or land. Third, sales tax, but only if you choose it instead of income tax (you cannot deduct both). Fourth, local taxes like city income tax, school district taxes, or county taxes.

What does not count: federal income tax, federal excise taxes, gasoline tax, vehicle registration fees, utility taxes, or business taxes if you are self-employed. Self-employed people cannot deduct their self-employment tax (FICA) as SALT. If you own a business and pay state business income tax, that counts. If you pay state unemployment insurance or workers' compensation, those do not count as SALT.

The sales tax option is rarely used because most people pay more in income tax than sales tax. However, if you live in a state with no income tax (like Texas or Florida) but high sales tax, you can deduct the sales tax instead. You would use IRS tables or track your actual sales tax receipts; most people use the tables because tracking is tedious.

How the $10,000 cap changes your deduction

The $10,000 annual limit is a hard ceiling. If you paid $12,000 in state income tax and $9,000 in property tax, your total SALT before the cap is $21,000. You can only deduct $10,000. The remaining $11,000 is lost; you cannot carry it forward to next year or use it in any other way.

For married couples filing jointly, the cap is still $10,000 total, not $10,000 each. If you and your spouse file separately, each of you gets a $5,000 cap. Filing separately is almost never advantageous for other reasons, so most couples file jointly and share the $10,000 limit.

The cap hits hardest in high-tax states. A homeowner in New Jersey paying $8,000 in state income tax and $7,000 in property tax would want to deduct $15,000 but can only deduct $10,000. Someone in a low-tax state paying $3,000 in income tax and $2,000 in property tax faces no practical cap because their total is already under $10,000.

When SALT deduction saves you money versus when it does not

The SALT deduction saves you money only if two conditions are met: you itemize deductions, and you are in a tax bracket where the deduction reduces your taxable income. The second part is automatic — if you itemize, the deduction reduces your taxable income. The first part is the real gate.

Example: You are single, earn $70,000, paid $6,000 in state income tax, and $5,000 in property tax. Your SALT deduction would be $10,000 (capped). Your other deductions are $500 in charitable donations. Your total itemized deductions are $10,500. The standard deduction for 2024 is $14,600. Since $10,500 is less than $14,600, you take the standard deduction instead. The SALT deduction gives you zero tax benefit because you do not itemize.

Different example: You are married, earn $150,000, paid $8,000 in state income tax, $7,000 in property tax, and have a $400,000 mortgage with $12,000 in annual interest. Your SALT deduction is $10,000 (capped). Your mortgage interest deduction is $12,000. Your total itemized deductions are $22,000. The standard deduction for married couples is $29,200. You still take the standard deduction because $22,000 is less than $29,200. Again, SALT gives you no benefit.

Third example: You are married, earn $200,000, paid $8,000 in state income tax, $9,000 in property tax, and have $15,000 in mortgage interest. Your SALT deduction is $10,000 (capped). Your mortgage interest is $15,000. Your charitable donations are $6,000. Your total itemized deductions are $31,000. This exceeds the $29,200 standard deduction, so you itemize. The SALT deduction is part of what makes itemizing worthwhile.

How to claim SALT on your tax return

To claim SALT, you file Schedule A (Form 1040) with your federal return. Schedule A is the form where you list all itemized deductions. Line 5 of Schedule A is labeled "State and local taxes." You enter your SALT deduction there, up to the $10,000 cap. You do not need to attach receipts to your return, but you should keep them for your records in case the IRS asks.

Before you fill out Schedule A, calculate your total itemized deductions and compare it to the standard deduction for your filing status. If your itemized total is lower, do not file Schedule A at all — just take the standard deduction. If your itemized total is higher, file Schedule A and claim SALT as part of it.

If you use tax software, the program will ask you about state and local taxes paid and will calculate whether you should itemize or take the standard deduction. If you work with a tax preparer, bring documentation of your state income tax (your state return or pay stubs showing withholding), property tax (your property tax bill), and any other local taxes. The preparer will determine whether SALT helps your situation.

The SALT cap expiration and what might change

The $10,000 SALT cap was set to expire at the end of 2025 under the Tax Cuts and Jobs Act of 2017. This means that unless Congress extends the cap, it will disappear on January 1, 2026, and there will be no limit on SALT deductions. However, Congress has extended tax provisions before, and it may do so again. The outcome depends on future legislation, which is not yet certain.

If the cap expires, people in high-tax states would be able to deduct all their SALT without the $10,000 limit. This would increase the tax benefit for high-income earners in states like New York, California, and New Jersey. If Congress extends the cap, the $10,000 limit continues. If Congress raises the cap to $15,000 or another amount, the benefit would be somewhere in between.

For now, plan based on the current $10,000 cap. If you are considering a major purchase like a home or a move to a different state, the SALT cap is one factor to consider, but it should not be the only one. Tax planning is only one part of a larger financial decision.

Frequently Asked Questions

Can I deduct both state income tax and sales tax?

No. You choose one or the other, not both. Most people deduct state income tax because it is usually larger. You would only choose sales tax if you live in a state with no income tax or very low income tax but high sales tax. You cannot deduct both in the same year.

Does the SALT deduction reduce my federal tax dollar-for-dollar?

No. The deduction reduces your taxable income, and your tax savings depend on your tax bracket. If you are in the 24% federal tax bracket and deduct $10,000 in SALT, you save $2,400 in federal tax. If you are in the 12% bracket, you save $1,200. The deduction itself is the same; the tax savings vary by your bracket.

What if I paid estimated taxes to my state — does that count?

Yes. State estimated tax payments count toward SALT. You deduct the total state income tax you paid during the year, whether it came from withholding, estimated payments, or a payment with your state return. Keep records of all state tax payments.

Can I deduct property tax on a rental property I own?

Yes, but there is a complication. Property tax on a rental property is a business expense, not a personal deduction. You deduct it on Schedule E (rental income and expenses), not on Schedule A. The $10,000 SALT cap applies only to personal SALT deductions on Schedule A, not to business property tax on Schedule E. Consult a tax preparer if you own rental property.

If I am married and file separately, do I each get $10,000?

No. If you file separately, each spouse gets a $5,000 SALT cap. Filing separately is almost never worth it because you lose other tax benefits. Married couples should almost always file jointly, which gives you one $10,000 cap to share.