How Do You Claim the SALT Deduction in 2025? (w/Examples) + FAQs

This article reflects federal rules and selected state rules as of June 2026 and covers tax year 2025. Tax law changes fast — confirm current figures with the IRS or a licensed tax professional before you file.

Quick Answer

You claim the SALT deduction by itemizing on Schedule A (Form 1040) instead of taking the standard deduction. For tax year 2025, you can deduct up to $40,000 in combined state and local taxes ($20,000 if married filing separately) — but only if your total itemized deductions beat your standard deduction.

This is a big jump. For years, the SALT write-off was capped at just $10,000, no matter how much you actually paid your state and town. Starting with the 2025 tax year, the One Big Beautiful Bill Act (OBBBA), signed by President Donald Trump on July 4, 2025, raised that ceiling to $40,000 — four times the old limit. If you live in a high-tax state and pay real money in income and property taxes, this change can cut your federal tax bill by thousands.

But the bigger cap comes with strings, and the clock is ticking. The $40,000 limit is temporary, it shrinks for high earners, and it reverts back to $10,000 in 2030. About 9 in 10 filers now take the standard deduction, so the first real question is whether itemizing even makes sense for you — and this guide walks you through that math step by step.

Here is what you will learn:

💰 Exactly how much SALT you can deduct in 2025 and how the $40,000 cap works
📉 How the income phase-out quietly shrinks your deduction once you earn over $500,000
🧾 The step-by-step way to claim it on Schedule A, line by line
🏛️ Whether your state lets business owners skip the cap entirely with a PTET election
⚠️ The costly mistakes that make people lose the deduction or trigger an IRS notice

What the SALT Deduction Actually Is

The SALT deduction lets you subtract certain state and local taxes you paid during the year from your federal taxable income. SALT stands for “State And Local Taxes.” Lowering your taxable income lowers the federal tax you owe. It is one of the oldest itemized deductions in the tax code, and it exists so you are not taxed twice on the same dollar — once by your state and again by Washington.

Four kinds of taxes count toward your SALT total. You add them up, then apply the cap. The four are spelled out in the Schedule A instructions:

State and local income taxes — what your state and city withheld from your paychecks or you paid in estimates.
State and local property taxes — what you paid on your home, land, or other real estate.
Personal property taxes — yearly taxes based on the value of items like your car, charged by some states.
State and local general sales taxes — you may deduct these instead of income taxes, but never both.

Here is the rule that trips people up. You must choose between deducting state income taxes or state sales taxes — you cannot claim both in the same year. Most people in income-tax states deduct income taxes because the number is bigger. But if you live in a state with no income tax, such as Texas, Florida, or Washington, the sales tax option is the only one that helps you. The consequence of picking wrong is a smaller deduction and a higher tax bill, so run both numbers before you file.

A common misconception is that any tax you pay counts. It does not. Federal income tax, Social Security and Medicare tax, federal excise taxes, fees for licenses, and homeowner association dues are not deductible as SALT. If you mistakenly include them, you have overstated your deduction, and the IRS can adjust your return and charge interest and penalties. What you should do is keep a clean record — your W-2 (Box 17), your state estimated payment confirmations, and your property tax bills — so your SALT figure is accurate and defensible.

How Much SALT You Can Deduct in 2025

For tax year 2025, the SALT cap is $40,000 for most filers and $20,000 for married filing separately. This is set in the OBBBA and confirmed in the IRS 2025 Schedule A instructions. The cap then rises 1% a year — to $40,400 for 2026 — through 2029. In 2030, unless Congress acts again, it snaps back to the old $10,000 limit.

The cap is per tax return, not per person. A married couple filing jointly shares one $40,000 cap — they do not get $40,000 each. This is why some high-SALT couples briefly wonder if filing separately helps; it usually does not, because separate filers split the cap in half to $20,000 each and lose other tax breaks in the process. The consequence of misreading this is overstating your deduction by tens of thousands of dollars, which the IRS will catch and reverse.

It also matters that the cap applies after you add up all four tax types. If you paid $32,000 in state income tax and $14,000 in property tax, your true SALT is $46,000 — but you can only deduct $40,000 for 2025. The extra $6,000 is simply lost; it does not carry forward to next year. What you should do is plan the timing of optional payments (like a January property tax installment) so you are not stacking deductible taxes you cannot use.

The 2025 Income Phase-Out (the “SALT Torpedo”)

The $40,000 cap does not last for everyone. It phases down once your modified adjusted gross income (MAGI) tops $500,000 ($250,000 for separate filers). Above that line, the cap drops by 30% of every dollar of MAGI over the threshold, but it never falls below $10,000, per The Tax Adviser. MAGI is your adjusted gross income with a few items added back; for most people it is very close to their AGI.

This creates what tax pros call the “SALT torpedo.” Between $500,000 and $600,000 of MAGI, every extra dollar you earn also strips away SALT benefit, pushing your real marginal tax rate well above the stated bracket. Once MAGI hits $600,000, the cap is fully ground down to $10,000 — the same as before the law changed. The phase-out thresholds also rise 1% a year through 2029.

The consequence is sharp and easy to miss: a year-end bonus or a big capital gain can cost you far more tax than you expect, because it shrinks your deduction at the same time it raises your income. What you should do if you are near $500,000 is talk to a CPA about deferring income, timing gains, or bunching deductions before December 31 — small moves can save real money.

Which Situation Applies to You?

The SALT rules are not one-size-fits-all. Find the row that fits you, then read the section it points to.

You pay under $10,000 in total state and local taxes. The bigger cap does not change your math. You likely still take the standard deduction. Read “Should You Itemize at All?”
You pay $10,000–$40,000 in SALT and earn under $500,000. You are the prime winner from this law. You can deduct your full SALT amount if you itemize. Read “How to Claim It on Schedule A.”
Your MAGI is between $500,000 and $600,000. Your cap is shrinking. Read “The 2025 Income Phase-Out.”
Your MAGI is over $600,000. Your cap is back to $10,000. Your best lever is the PTET workaround. Read “The PTET Workaround for Business Owners.”
You own a pass-through business (S corp, partnership, LLC). You may be able to skip the cap entirely. Read “The PTET Workaround for Business Owners.”
You live in a no-income-tax state. Deduct sales tax, not income tax. Read “Does My State Follow This?”

Should You Itemize at All?

The SALT deduction only helps if you itemize, and itemizing only helps if your total itemized deductions beat the standard deduction. For tax year 2025, the standard deduction is $31,500 for married filing jointly, $23,625 for head of household, and $15,750 for single or married filing separately. You take the larger of the two — never both.

Here is the break-even logic. Add your SALT (up to the cap) to your other itemized deductions — mortgage interest, charitable gifts, and large medical costs. If that total is higher than your standard deduction, itemize. If not, take the standard deduction and skip Schedule A. The consequence of itemizing when you should not is a higher tax bill, because you gave up a bigger automatic write-off.

A common misconception is that the new $40,000 SALT cap automatically means you should itemize. Not true. If your only big deduction is $14,000 in SALT and you are married filing jointly, your itemized total of $14,000 falls far short of the $31,500 standard deduction — so itemizing would cost you. What you should do is total your itemized deductions first, compare to your standard deduction, and only then decide.

How to Claim It on Schedule A (Step by Step)

You claim SALT on Schedule A (Form 1040), the itemized-deductions form you attach to your Form 1040. It is due on the normal filing deadline — April 15, 2026, for 2025 returns, or October 15, 2026, if you file an extension. Filing late without an extension can trigger a failure-to-file penalty, so mark the date. Note that some other OBBBA deductions use the new Schedule 1-A, but the SALT deduction itself stays on Schedule A.

Work through the Taxes You Paid section, lines 5a through 5e:

Line 5a — State and local income OR sales taxes. Enter income taxes (from W-2 Box 17 plus estimates) or sales taxes, not both. Check the box if you chose sales tax.
Line 5b — State and local real estate taxes. Enter property taxes paid on your home and land during 2025.
Line 5c — State and local personal property taxes. Enter value-based taxes, such as certain car registration fees.
Line 5d — Add lines 5a through 5c. This is your true, uncapped SALT total.
Line 5e — Apply the cap. Enter the smaller of line 5d or your cap ($40,000, or $20,000 MFS, or your phased-down amount).

After line 5e, you add your other itemized deductions and carry the grand total to Form 1040, line 12. The consequence of skipping line 5e and entering your full uncapped number is an overstated return that the IRS will correct, with interest. What you should do is keep every supporting document — pay stubs, property tax receipts, and estimated-payment records — for at least three years in case of an audit.

Worked Examples With Real Numbers

Numbers make this real. Each example below shows the actual math so you can copy it for your own return. All figures use 2025 rules.

Example 1: Maria, a New Jersey teacher and her spouse (under the threshold)

Maria and her husband file jointly. They pay $18,000 in New Jersey income tax and $14,000 in property tax, for $32,000 in SALT. Their MAGI is $190,000, well under $500,000. Their cap is the full $40,000, so all $32,000 is deductible. Add $9,000 of mortgage interest, and their itemized total is $41,000 — above the $31,500 standard deduction. They itemize and deduct $41,000. Under the old $10,000 cap, they could have deducted only $19,000 total, so the new law saves them tax on roughly $22,000 of income.

Example 2: David, a Manhattan attorney in the phase-out

David files single with a MAGI of $550,000 and pays $60,000 in SALT. Because his MAGI is $50,000 over the $500,000 threshold, his cap drops by 30% × $50,000 = $15,000. His cap is $40,000 − $15,000 = $25,000. Even though he paid $60,000, he can deduct only $25,000 for 2025. This mirrors the Mercer Advisors example of a filer at $550,000.

Example 3: Priya, a tech executive above $600,000

Priya files jointly with her spouse at a MAGI of $650,000 and pays $45,000 in SALT. Her cap reduction is 30% × ($650,000 − $500,000) = $45,000 — but the cap can never fall below $10,000. So her cap is $10,000, exactly the old limit. For Priya, the OBBBA increase gives no benefit, which is why she should explore the PTET route through her business.

Scenario Tables

These three common situations show what the cap does to real filers in 2025.

Middle-income itemizer in a high-tax state

Your situation	What you can deduct
$30,000 SALT paid, MAGI $200,000, MFJ	Full $30,000 — under the $40,000 cap and under the phase-out
Itemized total beats $31,500 standard deduction	Itemize on Schedule A and capture the full benefit

High earner caught in the phase-out

Your situation	What you can deduct
$50,000 SALT paid, MAGI $550,000, single	$25,000 — cap reduced by 30% of the $50,000 excess
Same SALT, MAGI $600,000+	$10,000 — fully phased down to the old cap

Resident of a no-income-tax state

Your situation	What you can deduct
Texas filer, no state income tax	Deduct state and local sales tax instead, plus property tax
Sales tax + property tax under $40,000	Full amount, if you itemize and beat the standard deduction

The PTET Workaround for Business Owners

If you own a pass-through business — an S corporation, partnership, or multi-member LLC — you may sidestep the SALT cap entirely with a pass-through entity tax (PTET) election. The idea is simple: the business pays your state income tax at the entity level and deducts it as a business expense, which is not subject to the individual $40,000 cap. You then get a state credit for the tax the business paid. The IRS blessed this approach in Notice 2020-75, and the final OBBBA left it intact for all trades and businesses.

This matters most for high earners hit by the phase-out. Take Priya from Example 3, whose personal cap is stuck at $10,000. If her S corporation makes a PTET election and pays her state tax at the business level, that tax becomes fully deductible federally, bypassing the cap. The consequence of not electing, when you qualify, can be tens of thousands in lost deductions. What you should do is ask your CPA before your state’s PTET election deadline, which often falls during the tax year, not after it.

A major caveat: PTET rules are set by each state, and roughly 36 states offer it — but the details differ sharply. Some states require the election early in the year, some have specific forms, and some limit which owners benefit, per Plante Moran. A common misconception is that one PTET election covers every state you do business in. It does not — you may need a separate election in each state. Confirm your state’s exact rules with its department of revenue.

Does My State Follow This?

The SALT deduction is a federal deduction. It changes only your federal taxable income — it does not change what you owe your own state. Many states use their own deduction rules and do not let you deduct SALT on the state return at all. So a bigger federal SALT deduction does not automatically lower your state tax bill.

State conformity to OBBBA also varies. Some states automatically follow new federal rules (“rolling conformity”), and some lock to the federal code on a fixed date and must pass a law to adopt changes (“static conformity”). The consequence is that the same income can be taxed differently from one state to the next. What you should do is check your state department of revenue’s guidance on whether it conforms to the 2025 federal changes before assuming your state return mirrors your federal one.

If you live in a no-income-tax state — Texas, Florida, Washington, Nevada, South Dakota, Wyoming, Alaska, Tennessee, or New Hampshire — the federal SALT picture is different but still useful. You have no state income tax to deduct, so you deduct state and local sales taxes plus property taxes instead. For homeowners with high property tax bills, that combination can still approach the cap. The honest answer for these states is that the income-tax piece of SALT simply does not apply to you.

Mistakes to Avoid

Each error below has a real cost. Skip these and your return stays clean.

Deducting both income and sales tax. You may pick only one. Claiming both overstates your deduction and invites an IRS adjustment with interest.
Forgetting the cap on line 5e. Entering your full uncapped SALT inflates your return; the IRS will correct it and may add penalties.
Itemizing when the standard deduction is larger. You hand back a bigger automatic write-off and pay more tax than you had to.
Ignoring the phase-out above $500,000 MAGI. You claim a $40,000 cap you no longer qualify for, leading to an underpayment and interest.
Including non-deductible taxes. Federal tax, Social Security tax, license fees, and HOA dues are not SALT; counting them overstates your deduction.
Assuming a couple gets two caps. Married joint filers share one $40,000 cap, not $40,000 each — a costly doubling error.
Missing your state’s PTET election deadline. The election often must be made during the tax year; miss it and you lose the workaround for that year.
Tossing your records. Without W-2s, property tax receipts, and payment proof, you cannot defend the deduction in an audit.

Do’s and Don’ts

Do total all four SALT types before applying the cap, so you do not understate what you paid.
Do compare your itemized total to the standard deduction every year, because the right answer can change.
Do run both the income-tax and sales-tax options if you live near a state line or travel, since the larger one wins.
Do keep tax records for at least three years, the standard IRS audit window for most returns.
Do consult a CPA if your MAGI is near $500,000, where the phase-out and timing moves matter most.
Don’t assume the new $40,000 cap means you should itemize — check the break-even math first.
Don’t claim both income and sales taxes in the same year; the code forbids it.
Don’t ignore your state’s separate rules, since a federal SALT deduction rarely lowers state tax.
Don’t double the cap by filing separately hoping for more; you each get only half.
Don’t wait until April to consider a PTET election, because most state deadlines fall earlier.

Pros and Cons of the Higher Cap

Pro: The $40,000 cap is four times the old $10,000 limit, a major break for high-tax-state residents who itemize.
Pro: It makes itemizing worthwhile again for many middle-income homeowners, unlocking other deductions too.
Pro: The cap rises 1% a year through 2029, giving modest built-in growth.
Pro: The PTET workaround survives, so business owners can still bypass the cap entirely.
Pro: More filers now save real federal tax dollars without changing how they live or earn.
Con: The cap is temporary and reverts to $10,000 in 2030 unless Congress extends it.
Con: The phase-out above $500,000 MAGI creates a steep “torpedo” that can spike your effective tax rate.
Con: It only helps if you itemize, which most filers do not.
Con: It does not change your state tax bill, so the savings are federal-only.
Con: The yearly inflation steps and shifting thresholds make long-term planning harder.

What to Do Next

Take these steps in order to claim your 2025 SALT deduction correctly:

Add up all four SALT types — state income (or sales) tax, real estate tax, and personal property tax.
Gather your proof — W-2 Box 17, estimated-payment confirmations, and property tax receipts.
Compare itemized vs. standard — if your itemized total beats $31,500 (MFJ) or $15,750 (single), itemize.
Check your MAGI — if it is over $500,000, calculate your phased-down cap before filing.
Fill out Schedule A, lines 5a–5e, and apply the cap on line 5e.
File by April 15, 2026, or request an extension to October 15, 2026.
Call a CPA if you own a pass-through business, sit near the phase-out, or are unsure — this article is educational, not personal tax advice.

FAQs

What is the SALT deduction cap for 2025?

$40,000 for most filers and $20,000 for married filing separately, for tax year 2025. The cap rises 1% a year through 2029, then reverts to $10,000 in 2030 unless Congress extends it.

Where do I claim the SALT deduction?

On Schedule A (Form 1040), in the “Taxes You Paid” section, lines 5a through 5e. You must itemize to use it, and you attach Schedule A to your Form 1040.

Do I have to itemize to claim the SALT deduction?

Yes. The SALT deduction is only available to filers who itemize. If you take the standard deduction, you cannot claim SALT, so itemizing must beat your standard deduction to help.

Can I deduct both state income tax and sales tax?

No. You must choose one or the other in a given year. Most people in income-tax states pick income taxes; residents of no-income-tax states deduct sales taxes instead.

Does the $40,000 cap apply to each spouse?

No. Married couples filing jointly share a single $40,000 cap. Married filing separately splits it to $20,000 each, not $40,000 each.

What happens to my SALT deduction if I earn over $500,000?

It shrinks. Above $500,000 MAGI, the cap drops by 30% of the excess. At $600,000 MAGI or more, it falls to the $10,000 floor for tax year 2025.

What is MAGI for the SALT phase-out?

Modified adjusted gross income — your AGI with certain items added back. For most filers it is very close to AGI, and it determines whether the phase-out reduces your cap.

Will the higher SALT cap lower my state tax bill?

No. SALT is a federal deduction and only reduces federal taxable income. Most states use their own rules, so your state tax usually does not change.

Can business owners avoid the SALT cap?

Yes, often. Through a pass-through entity tax (PTET) election, the business pays state tax and deducts it without the cap. Rules vary by state, so check your state’s deadline.

When does the higher SALT cap expire?

After 2029. For tax year 2030, the cap reverts to $10,000 ($5,000 MFS) unless Congress passes a new law to extend the higher limit.

What taxes do not count as SALT?

Federal taxes and fees. Federal income tax, Social Security and Medicare tax, federal excise taxes, license fees, and HOA dues are not deductible as state and local taxes.

Is the SALT deduction worth it if I rent?

Sometimes. Renters have no property tax but can still deduct state income or sales taxes. Whether it helps depends on whether your itemized total beats the standard deduction.

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