State and local taxes are deductible on your federal return, but only if you itemize

You can deduct state income taxes, state sales taxes, and local property taxes on your federal tax return — but only if you choose to itemize deductions instead of taking the standard deduction. Most people do not itemize because the standard deduction is larger. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. If your state and local taxes plus other deductible expenses do not add up to more than that, itemizing saves you nothing.

The catch is the SALT cap: you can deduct no more than $10,000 per year in state and local taxes combined, regardless of how much you actually paid. This limit applies whether you are single or married filing jointly. If you live in a high-tax state like California, New York, or New Jersey, this cap may mean you cannot deduct all the state tax you owe.

The SALT cap has been in place since 2018 and is set to expire at the end of 2025 unless Congress extends it. After that date, the limit may change or disappear, but for now, $10,000 is the maximum you can claim.

Key Takeaways

  • State income tax and local property tax are deductible on your federal return only if you itemize deductions, which most people do not do.
  • The $10,000 annual cap on state and local tax deductions applies to all filers and covers income tax, sales tax, and property tax combined.
  • You should itemize only if your total deductible expenses (state taxes, property taxes, mortgage interest, charitable donations) exceed the standard deduction for your filing status.
  • The SALT cap is scheduled to expire at the end of 2025, after which the deduction rules may change.

When itemizing makes sense versus taking the standard deduction

Itemizing is worth doing only if your deductible expenses total more than the standard deduction. For 2024, that means your state taxes, property taxes, mortgage interest, and charitable donations combined must exceed $14,600 (single) or $29,200 (married filing jointly). If they do not, the standard deduction gives you a larger tax break with no paperwork.

High-income earners and homeowners in expensive states are most likely to itemize. If you own a home with a large mortgage, live in a state with high income tax, and make charitable donations, adding those up may push you over the standard deduction threshold. If you rent, have no mortgage interest to deduct, and live in a low-tax state, itemizing almost certainly does not help you.

You choose one or the other on your tax return — you cannot take the standard deduction and also itemize. The IRS will accept whichever method gives you the larger deduction.

What counts as state and local taxes you can deduct

State income tax is deductible if you paid it. You can deduct either the tax you actually paid or the standard deduction for your state, whichever is higher — but you must choose one method and stick with it for the year. Most people deduct what they actually paid.

Local property tax on real estate is deductible. This includes taxes on your home, rental property, or land. It does not include homeowners insurance, HOA fees, or mortgage payments themselves — only the property tax bill from your county or municipality.

State and local sales tax is deductible, but only if you choose to deduct sales tax instead of state income tax. You cannot deduct both. Most people deduct income tax because it is usually larger, but if you live in a state with no income tax (like Texas, Florida, or Nevada) and high sales tax, you would deduct sales tax instead. The IRS publishes a table of average sales tax deductions by state and income level, or you can track your actual receipts.

You cannot deduct federal income tax, federal payroll tax, or state unemployment insurance. You also cannot deduct vehicle registration fees, business taxes, or penalties.

How the $10,000 SALT cap works in practice

The $10,000 limit is a hard ceiling. If you paid $15,000 in state income tax and $8,000 in property tax, you can deduct only $10,000 total, not $23,000. The IRS does not let you choose which taxes to count — you add them all together and cap the total at $10,000.

For married couples filing jointly, the cap is still $10,000, not $10,000 per person. If both spouses earned income in high-tax states, they still cannot deduct more than $10,000 combined.

If you own property in multiple states, all state and local taxes on all that property count toward the same $10,000 cap. You cannot deduct $10,000 from one state and $10,000 from another.

State tax deductions for people who do not own homes

Renters can still deduct state income tax and local taxes if they itemize, but they have no property tax to add to the deduction. This means renters need other deductible expenses — charitable donations, mortgage interest on a second property, or state sales tax — to reach the standard deduction threshold and make itemizing worthwhile.

For most renters, the standard deduction is larger than state income tax alone, so itemizing does not help. A renter in New York who paid $5,000 in state income tax would be better off taking the $14,600 standard deduction (if single) than itemizing just the $5,000 in state tax.

What happens to the SALT cap after 2025

The $10,000 SALT cap was part of the 2017 Tax Cuts and Jobs Act and is currently set to expire on December 31, 2025. After that date, the deduction rules will change unless Congress votes to extend the cap.

If the cap expires, the deduction limit may increase, disappear entirely, or be replaced with a different rule. Congress has not yet decided what will happen. Until there is a new law, assume the $10,000 cap applies to your 2024 and 2025 tax returns.

If you are planning major financial decisions — like buying a home in a high-tax state — it is worth checking the current status of the SALT cap, but do not count on it changing. Tax law changes are unpredictable, and the cap could be extended as-is.

How to report state tax deductions on your federal return

If you itemize, you report state and local taxes on Schedule A (Form 1040), which is the itemized deductions form. Line 5 is for state income tax, and line 6 is for property taxes. You add them together, explore the $10,000 cap, and enter the result on your Form 1040.

If you use tax software, it will walk you through the questions and calculate the cap automatically. If you file by hand or with a tax preparer, make sure they know the total of all your state and local taxes so they can explore the limit correctly.

You will need documentation: your state tax return showing how much you paid, your property tax bill from your county assessor, and receipts for any sales tax you deducted. Keep these records for at least three years in case the IRS asks questions.

Frequently Asked Questions

Can I deduct state taxes if I take the standard deduction?

No. The standard deduction and itemized deductions are mutually exclusive. You choose one or the other. If you take the standard deduction, you cannot also deduct state taxes. The IRS will accept whichever method gives you the larger deduction.

Does the $10,000 SALT cap explore to me if I am married filing separately?

Yes. If you file separately from your spouse, the $10,000 cap still applies to each of you individually. You cannot split the cap or combine it with your spouse's return. Most married couples file jointly and share the $10,000 limit.

What if I paid estimated state taxes during the year?

Estimated state taxes count toward your deduction the same way as taxes withheld from your paycheck. Add up all state taxes you paid during the year — withheld, estimated, or paid with your return — and that is your deductible amount, subject to the $10,000 cap.

Can I deduct state taxes I paid in a previous year?

You deduct state taxes in the year you paid them, not the year they were owed. If you paid 2023 state taxes in April 2024, that payment counts on your 2024 return. This matters if you made a large payment in January that covered taxes from the previous year.

Does the SALT cap affect my state tax return?

No. The $10,000 cap is a federal rule only. It does not change how much state tax you owe or how you report it to your state. Your state tax return is separate and unaffected by the federal deduction limit.