Can You Deduct State Income Taxes On Federal Return? + FAQs

Yes, you can deduct state income taxes on your federal return, but only if you itemize deductions and stay within the $10,000 SALT cap.

According to a 2022 IRS analysis, only about 10% of U.S. taxpayers now itemize their deductions – down from roughly 31% in 2017 – meaning most filers don’t get to write off state taxes under current rules. If you’re wondering whether you can claim this tax break and how to maximize it, keep reading. This comprehensive guide breaks down everything you need to know in plain English, from federal rules to state-by-state quirks.

According to a 2023 Tax Foundation study, over 90% of Americans now take the standard deduction instead of itemizing – leaving billions in potential state tax write-offs on the table. Below, we’ll delve into how the state and local tax (SALT) deduction works, who benefits, and how to avoid costly mistakes. Read on to learn:

💡 The exact rules for deducting state taxes – When you can claim state income (or sales) taxes on Schedule A, and why itemizing is the only path to this deduction.
🤑 How to maximize your tax savings – Strategies for deciding between the standard deduction and itemizing, plus tips to get the most out of the $10,000 SALT limit.
⚖️ Pros vs. cons of writing off state taxes – A clear breakdown of the benefits (lower federal tax bills, avoiding double-taxation) and drawbacks (caps, complexity, mainly helping high earners).
🌎 Why your state matters – High-tax vs. no-tax states, and how special state rules or “SALT cap workarounds” can make a huge difference in what you can deduct federally.
🚩 Mistakes that trigger IRS red flags – Common errors to avoid (like deducting state taxes when you shouldn’t, or forgetting the SALT cap) and how to stay on the safe side of tax law.

Let’s explore how you can deduct state income taxes on a federal return – and ensure you do it correctly and advantageously.

How to Write Off State Taxes: The Federal Rules You Must Know

Deducting state income taxes on your federal return isn’t automatic – it’s a special perk tied to itemizing your deductions. Here are the key federal rules and conditions you must understand:

Itemize vs. Standard: The Only Way to Deduct State Taxes

First, know that you cannot deduct state or local taxes if you take the standard deduction. The IRS gives every taxpayer a choice each year: take a flat standard deduction (a fixed amount that reduces your income) or itemize deductions (list out actual deductible expenses like taxes, mortgage interest, charity, etc.). You can only pick one method, whichever gives you the bigger tax break.

Standard deduction amounts (2023): $13,850 for single filers, $27,700 for married joint filers (slightly higher for age 65+ or blind). Most people take this easy one-line deduction because it’s generous and simple.
Itemized deductions: If you have enough deductible expenses (including state taxes) to exceed the standard amount, you itemize on Schedule A. This lets you subtract things like state income taxes, property taxes, mortgage interest, and charitable donations from your taxable income. Itemizing can save you more money but comes with more documentation and complexity.

The catch: Only itemized returns can claim the state tax deduction. If you choose the standard deduction, you forfeit any write-off for state and local taxes paid. This is why so few taxpayers deduct state taxes – nearly 90% stick with the standard deduction, especially after recent tax law changes raised it and capped the SALT write-off.

Example: Jane is a single filer who paid $5,000 in state income tax and $4,000 in property tax in 2023. Her total itemizable deductions (including those taxes) are around $9,000. The standard deduction for a single filer is $13,850 – much higher – so Jane will take the standard deduction and get no benefit from the $9,000 in taxes she paid. Only if Jane’s itemized expenses exceed $13,850 (say she also had a big mortgage or medical bills) would itemizing – and thus deducting state taxes – make sense.

Bottom line: You need to itemize on Schedule A to deduct state income taxes. Crunch the numbers to see if your deductible expenses exceed the standard amount. If not, you’re better off taking the standard deduction and skipping the SALT deduction entirely.

The $10,000 SALT Cap: Why High-Tax Bills Get Cut Off

Even if you itemize, there’s a hard limit on how much state and local tax you can deduct. The 2017 Tax Cuts and Jobs Act imposed a $10,000 cap on the SALT deduction (that’s short for “State And Local Taxes”). This SALT cap is in effect from 2018 through 2025 and significantly curtails this tax break, especially for people in high-tax states.

Key points about the SALT cap:

Maximum deduction = $10,000 for the sum of all state and local income taxes, sales taxes, property taxes, and certain personal property taxes you pay in a year. (If you’re married filing separately, it’s $5,000 each.) You cannot deduct beyond this threshold, no matter how much you actually paid.

The cap is not indexed for inflation, so $10,000 today is effectively a smaller benefit each year as costs rise. It also doesn’t double for joint filers – $10k is the limit per tax return, whether single or married filing jointly. (This is sometimes called a “marriage penalty” in the deduction.)

What if you paid more? Many taxpayers in states like New York, California, New Jersey, etc. pay far above $10k when you add state income + property taxes. Unfortunately, any amount above $10k is not deductible. For example, if you paid $7,000 state income tax and $6,000 property tax ($13k total), you can only deduct $10,000. The remaining $3k is on you – essentially, you’re being taxed on income that went to pay those extra state/local taxes.

The cap combines all types of SALT taxes. If you have multiple properties or multiple taxes, it’s the total that matters. You can’t take $10k for income tax and another $10k for property tax – it’s $10k combined. This often means homeowners in high-tax areas hit the limit with property tax alone, leaving their state income tax effectively non-deductible.

Example: John and Maria (married filing jointly) live in New Jersey. In 2024 they pay $8,000 in NJ state income tax and $9,000 in property taxes on their home, totaling $17,000. Even if they itemize, they can deduct at most $10,000 of those taxes. The extra $7,000 in taxes paid yields no federal deduction. In contrast, their friends in a lower-tax state who paid $4,000 state tax and $5,000 property tax ($9k total) could deduct the full $9,000 since it’s under the cap.

Important: The SALT cap is set to expire after 2025. If Congress does nothing, the deduction would revert to being unlimited (as it was pre-2018) starting in 2026. However, lawmakers could extend the cap or adjust it. There’s been intense debate – officials in high-tax states want the cap lifted, while others argue removing the cap mainly benefits wealthy taxpayers. For now, through tax year 2025, assume the $10,000 limit applies each year. Keep an eye out for changes in the law as 2026 approaches, because a return to unlimited SALT deductions could dramatically change your tax strategy (suddenly millions more might itemize again).

What Taxes Count (and Don’t Count) Toward SALT

Not every payment to your state or locality is deductible. The IRS only allows certain taxes to count under the “state and local tax” deduction. Here’s what qualifies:

State and local income taxes: This includes state income taxes withheld from your paychecks, estimated state tax payments, and any state/local income taxes you paid for a prior year (if you paid a balance due or late bill in the current year). Local income taxes (like New York City or Philadelphia wage taxes) count too. Essentially, any tax on your earnings paid to a state, city, county, etc. is part of SALT.

State and local general sales taxes: If you live in a state with no income tax, or if you made big purchases, you have a choice – you can deduct sales taxes you paid instead of income taxes. The IRS lets you pick whichever is higher. You can use actual receipts or an IRS table (which estimates sales tax based on your income and state rates, plus you can add large purchases like a vehicle or boat).
- You cannot deduct both income and sales tax – it’s one or the other. People in states like Florida, Texas, or Nevada (with no income tax) typically opt for the sales tax deduction. Those in income-tax states usually deduct the income tax because it’s larger than what they’d pay in sales tax. The election is made on Schedule A (just check a box for sales tax if choosing that over income tax).

Real estate property taxes: Any state, county, or city tax assessed on the value of real property you own (your home, land, etc.) is deductible. This is often a big one – property taxes can be thousands per year. Note that if you escrow your taxes in your mortgage, you can only deduct the amount actually paid to the taxing authority in that year (not necessarily what you sent to escrow). Also, if you paid any special assessments for local improvements (new sewer lines, etc.), those might not be deductible unless they’re for maintenance – generally only the taxes for the general public welfare are deductible, not fees for specific property benefits.

Personal property taxes: Some states charge annual taxes on personal property like vehicles, boats, or other valuables (often based on value, like a car’s ad valorem tax or vehicle registration fee that’s value-based). Those value-based personal property taxes are deductible too. Typically, it must be a yearly tax (even if collected biannually) based on the item’s value. For instance, an annual car tax in Virginia or California’s vehicle license fee portion can be included in SALT.

Foreign income taxes (optional): If you paid income tax to a foreign country, you usually take a foreign tax credit instead on your federal return. But you can choose to deduct foreign income taxes as an itemized deduction (this would count under SALT, though foreign taxes are separate on Schedule A). Generally, taking the credit is more beneficial for most, so deducting foreign taxes on Schedule A is less common.

And here’s what doesn’t count for the deduction:

Federal income taxes: You cannot deduct your federal taxes or any taxes paid to the U.S. government (this deduction only covers state/local taxes).

Payroll taxes: Social Security and Medicare taxes taken out of your paycheck are federal payroll taxes – not deductible. Same for federal unemployment taxes or railroad retirement taxes.

Estate, inheritance, or gift taxes: Taxes on inheriting money or gifting assets are not deductible.

Excise and specific use taxes: For example, gasoline taxes, hotel occupancy taxes, utility taxes, or sales taxes on specific items like alcohol/cigarettes are not separately deductible (they’re not “general” sales taxes and often factored into the price of goods).

Property transfer taxes or HOA fees: If you paid a one-time tax when buying a house (transfer or stamp tax) or yearly homeowner association dues, those are personal expenses, not deductible taxes.

Assessments for local benefits: If you were charged a special assessment for, say, a new sidewalk or sewer hookup in your neighborhood (a tax that benefits only property owners in a specific area), that’s generally not deductible unless it was for maintenance or repairs. Only taxes that fund general public services count.

State fees and licenses: Car registration fees based on weight or flat amount (not value), driver’s license fees, hunting licenses, etc., are not income or property taxes and can’t be deducted.

In short, the SALT deduction primarily covers broad-based taxes on income, sales, and property. If you paid it to state or local government and it’s not one of the excluded categories, it likely qualifies – up to the $10k cap.

From Unlimited to Capped: A Brief History of the SALT Deduction

To appreciate the current rules, it helps to know how we got here. The deduction for state and local taxes has existed for over 100 years – since the federal income tax began in 1913, taxpayers have been allowed to deduct state and local taxes paid. The idea was to prevent double taxation of the same income and to give states some leeway to tax their residents without overburdening them (since the federal government would effectively subsidize part of the state tax through deductibility).

For most of that history, the SALT deduction was unlimited – if you paid it to state or local government, you could write it off, no matter the amount. That’s why, prior to 2018, many high-income folks in high-tax states were deducting $20k, $30k, even $50k+ of state and local taxes on their federal returns, significantly reducing their IRS bills.

There were a few catches in earlier years (for instance, the Alternative Minimum Tax disallowed state tax deductions, so some wealthy taxpayers lost it under that system, and a now-repealed provision called the Pease limitation trimmed some deductions for very high earners). But generally, SALT was a major tax benefit enjoyed broadly – about 30% of households used the SALT deduction before 2018.

The big change: In late 2017, Congress passed the Tax Cuts and Jobs Act (TCJA), a sweeping tax reform. To help offset the cost of other tax cuts (and arguably for political reasons), the TCJA capped the SALT deduction at $10,000 starting in 2018. This was a shock to taxpayers in states like New York, California, New Jersey, Illinois, and others with high income and property taxes. Suddenly, no matter how high your state tax bills, you could only deduct up to $10k.

The effect was immediate and dramatic:

The percentage of tax filers who itemize deductions plummeted. In 2017, about 31% of filers itemized. By 2019–2020, after TCJA, only roughly 9–10% did. Millions who used to deduct state taxes found it no longer worthwhile to itemize because the new higher standard deduction plus the SALT cap made their potential itemized total smaller.

The SALT deduction went from a widely used benefit to a niche item mostly for higher-income, higher-tax-paying individuals. The federal government’s revenue from individual taxes increased in high-tax regions because those taxpayers lost a portion of their write-offs.

High-tax states felt pressure: some argue the cap was targeting “blue” states that tend to have higher taxes and public spending. In fact, four states (NY, NJ, CT, MD) sued the federal government claiming the SALT cap was unconstitutional (more on that later). While that effort failed in court, it underscored the contentious nature of the change.

Planning strategies changed. For example, people could no longer deduct pre-paid future state taxes beyond the cap (the IRS also issued rules disallowing creative workarounds like recharacterizing taxes as charitable donations – those schemes were shut down). The focus shifted to other deductions or credits to manage tax bills.

The SALT cap is scheduled to expire in 2026, but there’s no guarantee. Lawmakers might extend the cap or replace it with something else. If it does expire, we could see a resurgence of itemizing among middle and upper-middle-class taxpayers who currently don’t benefit from SALT due to the cap. For now, though, the $10k limit is the law, and anyone deducting state taxes must live within it.

State-by-State Differences: Why Your Location Matters

While the federal rules for deducting state taxes apply to everyone, your state of residence can dramatically affect how valuable (or usable) this deduction is for you. Here’s how living in a high-tax vs. low-tax state changes the picture, and some unique state-created strategies that can help certain taxpayers:

High-Tax vs. No-Tax States – Who Benefits More?

If you live in a high-tax state, you’re likely paying a lot in state income taxes and property taxes. States like California, New York, New Jersey, Illinois, Connecticut, Massachusetts (and several others) have above-average income tax rates and often pricey real estate taxes. Before the SALT cap, residents in these states typically had very large deductions – which the federal government essentially subsidized. Post-2018, these folks are the ones most constrained by the $10k cap:

High-tax state residents often max out the $10k cap easily. For example, a California couple with a $200,000 income might pay ~$15,000 in state income tax. If they own a home, their property tax might be another $7,000. That’s $22k of state/local taxes – but only $10k is deductible. They lose credit for more than half of what they paid.

In some cases, property tax alone hits the cap. Certain areas (think suburban New Jersey, New York, Connecticut) have property taxes that can exceed $10,000 annually on a single-family home. If you’re in that boat, the state income taxes you pay on top of it provide zero additional federal deduction. It can feel like double taxation – you pay your state, and then you pay federal tax on money that went to the state as well.

These high-tax states often saw the majority of their taxpayers itemizing pre-2018. Now, only the higher-income minority in those states still itemize. If you’re a moderate earner in a high-tax state, the standard deduction might now be more beneficial unless you also have other big deductions (like large mortgage interest or charitable contributions) to stack on top of your taxes.

On the flip side, low-tax or no-income-tax state residents have a different scenario:

No state income tax? Then you’re not paying anything in state income levy – which sounds great, but it means there’s no state income tax to deduct. Instead, you can choose to deduct state sales taxes. States with no income tax include Florida, Texas, Nevada, Washington, South Dakota, Alaska, Wyoming, and others (nine states in total have no broad income tax on wages). If you live there, your SALT deduction will consist of property taxes and either sales taxes or some smaller local taxes.

Sales tax deduction in action: The IRS provides tables for each state’s typical sales tax based on income and family size, plus you can add major purchases (a car, boat, RV, home renovations, etc.) for the year. If you made a big-ticket purchase and saved receipts, you might deduct more sales tax than the table amount. For instance, a Florida retiree might have a modest sales tax deduction (say $3,000) unless they bought a new car – paying, for example, $2,000 in sales tax on that car, which they can add to push the total higher. Still, in many cases, people in no-tax states may have less than $10k total between sales tax and property tax, meaning they don’t hit the cap.

Low-tax states: Even states with income tax but low rates (or low property values) might not get anywhere near the $10k cap. If you live in, say, Arizona or Indiana, your taxes might be a few thousand dollars. You’ll be able to deduct all of it if you itemize, but the question is whether it’s enough to justify itemizing. If your combined SALT and other deductions don’t exceed the standard deduction, you won’t itemize at all.

Irony for low-tax state filers: Many people in low-tax states take the standard deduction because their itemizables are too low, meaning they effectively get no benefit from SALT either (but primarily because they don’t need it). In contrast, people in high-tax states may want the deduction badly but are capped.

Winners and losers: In general, the relative value of the SALT deduction is highest for those who pay between $1 and $10k of state/local taxes and can itemize. Those in high-tax locales paying far above $10k get a partial benefit (up to the cap) but can feel shortchanged. Those in very low-tax situations might not need the deduction at all because the standard deduction covers them.

One more state-dependent factor: Some states have local jurisdictions (cities, counties) with their own income taxes (e.g., New York City, many Ohio cities, etc.). These local income taxes are deductible as part of SALT. So a New York City resident paying city tax in addition to NY state tax might hit $10k even faster than someone upstate. Always tally all state and local income taxes you pay – city, county, school district – they all count toward SALT.

(Note: A few states, such as Alabama, Iowa, Missouri, Montana, and Oregon, actually allow you to deduct your federal income tax on your state return – the reverse of SALT. This can lower your state taxable income. However, no matter what state you live in, you cannot deduct federal taxes on your federal return. The only interplay is the SALT deduction of state/local taxes on the federal side.)

SALT Workarounds: How States Help Some Taxpayers Bypass the Cap

The $10,000 cap frustrated many taxpayers and state governments, but clever accountants and lawmakers have devised some workarounds – primarily benefiting business owners:

1. Pass-Through Entity (PTE) Taxes: Starting around 2018–2020, numerous states created an optional pass-through entity tax as a workaround for owners of S-corporations, partnerships, and LLCs. Here’s how it works: Instead of the individual paying state income tax on their business earnings (and being limited to deducting $10k), the business entity itself pays a state tax on the income. That state tax paid by the business is fully deductible as a business expense on the federal return (business expenses aren’t subject to the $10k SALT cap). The state then gives the owner a credit or exclusion so they don’t get double-taxed. In essence, it shifts the tax deduction from the individual Schedule A (capped) to the business return (uncapped).

pgsqlCopy- This workaround was blessed by the IRS in late 2020 (IRS Notice 2020-75 confirmed that these entity-level taxes are deductible). 
- As of 2025, more than 30 states have implemented some version of a PTE tax workaround. For example, California, New York, Illinois, New Jersey, and others jumped on board.
- If you’re a small business owner or partner, *and* your state offers this, it can be a game-changer. You could potentially deduct tens of thousands in state taxes through your business, bypassing the individual $10k cap. 
- **Important:** This only applies to income from pass-through businesses. Your W-2 wage income or other personal income tax still hits the SALT cap. So it’s a niche benefit for business owners, not a fix for everyone.

2. Charitable Contribution Credits (blocked): Early on, some high-tax states attempted a different loophole: set up state-run charitable funds to which taxpayers could “donate” money in lieu of paying state taxes – and receive a near dollar-for-dollar state tax credit. The idea was you’d deduct the payment as a charitable donation (which wasn’t capped like SALT, aside from percentage-of-income limits) rather than a tax. For instance, you donate $20,000 to a state charitable fund for education, the state gives you $20,000 credit against your state taxes. You satisfy your state tax obligation and try to write off the $20k as a charity on your federal return.

pgsqlCopy- The IRS swiftly shut this down. Regulations now require that if you get a state tax credit in return for a charitable gift, you have to subtract that credit from the deductible amount. In effect, you can’t double-dip and turn taxes into charity. Thus, the “donation instead of tax” trick won’t fly (except for a small allowance if the credit is under 15% of the donation, which is a minor exception primarily for existing state charity credit programs).

3. Bunching and timing strategies: While not state-specific, individuals use timing to maximize deductions. For example, if your state allows, you might pay two years’ worth of property taxes in one calendar year to bunch deductions and itemize that year, then take standard the next year. However, the SALT cap limits the benefit of bunching – if two years of taxes exceed $10k (which they likely will if one year was already near $10k), you’re still capped at $10k for that year.

Bunching can help if in one year your SALT is normally far below $10k; by doubling up, you use more of the cap and potentially break over the standard deduction threshold. This strategy is more relevant to charitable contributions nowadays (since SALT is capped) but can still be considered for property tax if, say, your usual property tax is $5k and you could pay next year’s $5k in December to deduct $10k this year (hitting the cap and possibly making itemizing worthwhile, then take standard next year). Always verify that an early payment is allowed and will be recognized as paid for the tax year.

In summary, where you live and what you do for a living can influence how much of your state taxes you can deduct federally. High-tax state residents get some relief but often not on the full amount they pay. Business owners may have special avenues to navigate around the cap. And if you’re in a low-tax area, you might find the SALT deduction a moot point because the standard deduction covers you anyway.

Pros and Cons of Deducting State Income Taxes

Is deducting state and local taxes on your federal return truly beneficial for you? Consider these pros and cons:

Pros of Claiming State Tax Deductions	Cons of Claiming State Tax Deductions
Lowers your federal taxable income: Every dollar of state tax you deduct reduces the income that’s subject to federal tax (up to the SALT cap), potentially saving you money.	Capped at $10,000: You might pay far more in state taxes, but you can only deduct up to $10k ($5k if married filing separately). Any amount above that provides no federal tax benefit.
Prevents double taxation (to a point): Deducting state taxes means you’re not paying federal tax on money that went to state tax. It offers partial relief from being taxed twice on the same income.	Only for itemizers (most people can’t use it): If you take the standard deduction (which ~90% of taxpayers do), you get zero benefit from your state tax payments. You have to forego a simpler, often larger standard deduction to utilize SALT.
Can encourage home ownership and local investment: Property taxes are deductible under SALT. Homeowners in high-tax areas at least get to write off part of those hefty property bills (subject to the cap).	Complex and record-intensive: Itemizing requires keeping track of tax payments, forms (like 1098 from your mortgage for property taxes paid through escrow, or receipts for sales tax). It complicates your return compared to the one-line standard deduction.
Big benefit for high earners in high-tax states (under the cap): If you’re a high-income filer who itemizes, the SALT deduction can significantly cut your federal tax. For example, deducting a full $10k saves you $2,400 if you’re in the 24% tax bracket.	Primarily helps higher-income households: Critics note that the state tax deduction mostly benefits those with larger incomes and bigger tax bills. Lower-income taxpayers often don’t itemize at all, so this deduction doesn’t help them, yet they still pay state taxes.

As you can see, the SALT deduction is a double-edged sword. It can reduce tax liability for those who qualify, but recent changes limit its scope and have made it irrelevant for many filers. Weigh these pros and cons in the context of your own tax situation – sometimes taking the simple standard deduction (and not deducting state taxes) leaves you better off if your itemized deductions would be capped or only slightly above the standard amount.

Real-Life Examples: Three Common Taxpayer Scenarios

To illustrate how deducting state taxes works out in practice, let’s look at three typical scenarios. These examples show when the state tax write-off provides value and when it doesn’t:

Taxpayer Scenario	SALT Deduction Outcome
Standard Deduction Filer: A single renter with modest income in a medium-tax state. She pays $3,000 in state income tax and has no property tax (no home). Other deductions (charity, etc.) are minimal, totaling $1,000.	Does not itemize – no state tax deduction. Her total potential itemized deductions (~$4,000) are far below the $13,850 standard deduction. She claims the standard deduction and cannot deduct her $3,000 state tax. However, she likely pays less federal tax overall by using the larger standard deduction.
Itemizing Under the Cap: A married couple in a state with moderate taxes. They pay $6,000 in state income tax and $3,000 in property tax ($9,000 total). They also have $5,000 in mortgage interest and $2,000 in charitable donations.	Itemize – deduct full $9,000 of SALT. Their total itemized deductions are $9k (taxes) + $5k (interest) + $2k (charity) = $16,000. This exceeds their $27,700 standard deduction? No, it doesn’t – actually, $16k is below $27,700, so in this scenario they wouldn’t itemize after all. Let’s adjust: assume they had $15,000 in mortgage interest instead.* Then itemized = $9k + $15k + $2k = $26k, still just under $27,700. One more tweak: $9k SALT + $15k interest + $4k charity = $28k, now above standard.* In that case, they itemize and deduct the full $9,000 of state/local taxes since it’s below the cap. They benefit from all their taxes paid by writing them off federally, saving maybe ~$2,000 in tax (if in 22% bracket).
High-Tax Cap Reached: A high-income homeowner in a high-tax state. He pays $12,000 in state income tax and $10,000 in property tax ($22,000 total). He also gives some to charity and has mortgage interest, but those are icing on the cake.	Itemize – but capped at $10,000 SALT. No matter what, he can only deduct $10k of the $22k paid. Say he also has $8k mortgage interest and $5k charity; his itemized deductions sum to $10k (capped SALT) + $8k + $5k = $23k. If he’s married, that might barely exceed the $27,700 standard deduction – actually it doesn’t, so if married he might not itemize despite huge taxes! If single, $23k itemized vs $13,850 standard would make itemizing worthwhile. Either way, he loses out on deducting $12k of taxes he paid due to the cap. His federal tax savings on the SALT portion are limited (e.g., $10k deduction saves maybe $3,500 at his higher bracket, whereas pre-cap he could’ve saved ~$7-8k).

The above scenarios highlight a few realities: Many taxpayers with low-to-moderate state taxes won’t itemize at all under today’s rules (Scenario 1). Those who do itemize often have other deductions boosting them over the standard deduction threshold (Scenario 2). And in high-tax cases, the $10k cap means you might pay a lot more to your state than you can ever deduct federally (Scenario 3). Always evaluate both standard and itemized routes each year, because changes in income, homeownership, or law could flip which is better for you.

Tax Law Showdown: SALT Deduction in the Courts and Congress

The state tax deduction has not only been a financial issue but a legal and political one. Here’s a quick summary of the battles fought over SALT and what the future might hold:

States vs. Federal Government – The Lawsuit: In 2018, shortly after the $10k SALT cap was enacted, four states (New York, New Jersey, Connecticut, and Maryland) sued the U.S. Treasury, claiming the cap was unconstitutional. They argued that the federal government was unfairly targeting certain states and that the Constitution implicitly required a meaningful SALT deduction (citing the 16th Amendment and principles of state sovereignty).
- The case, often referred to as New York v. Yellen (initially v. Mnuchin under the prior Treasury Secretary), ultimately failed. In 2021, the U.S. Court of Appeals for the Second Circuit upheld the dismissal of the case, stating that Congress has the power to impose such a cap and it did not coercively violate states’ rights. The U.S. Supreme Court declined to review the case in 2022, effectively letting the SALT cap stand. Translation: the $10,000 cap is lawful and here to stay unless changed by legislation – states can’t overturn it through the courts.

The Political Debate: The SALT deduction has become a hot potato in Congress. Lawmakers from high-tax states (both Democrat and some Republican representatives) frequently push to repeal or raise the cap. For instance, there have been proposals to increase the cap to $20k or even $80k, or eliminate it entirely before 2025. Opponents of repeal argue that doing so mainly benefits wealthy taxpayers and would cost the federal treasury billions.
- Proponents claim the cap unfairly punishes people in certain states and amounts to double taxation. As a compromise, in late 2021 the House of Representatives passed a bill to raise the cap to $80,000 through 2030, but it didn’t become law. In 2023 and 2024, SALT relief continues to be a bargaining chip in tax discussions, but no changes have passed as of this writing.

Post-2025 Uncertainty: If nothing is done, the SALT cap sunsets after 2025, along with many other TCJA provisions. That would mean for 2026 onward, state and local taxes would once again be fully deductible (and the standard deduction would shrink back down, since TCJA’s doubling of it also ends). This could dramatically shift tax planning – potentially millions more would itemize again if SALT is uncapped.
- It would particularly benefit upper-middle and high-income filers in high-tax areas. However, Congress may choose to extend the current rules. Some analysts expect at least a temporary extension of the cap as a revenue measure. It’s truly up in the air – taxpayers and tax pros alike will be watching closely as 2025 nears.

Alternative Minimum Tax (AMT): It’s worth noting that even before the SALT cap, the value of the state tax deduction was somewhat illusory for very high earners because the Alternative Minimum Tax disallowed SALT deductions. TCJA raised the AMT exemption so fewer people get hit by AMT now. But if you’re subject to AMT, your state tax deduction is added back and doesn’t actually reduce your AMT tax. Under current law, relatively few folks trigger AMT, but if you do, keep in mind SALT might not help you in that scenario. (For most, the $10k cap is now the limiting factor rather than AMT.)

In summary, the SALT deduction remains a contentious topic. Legal challenges have failed, but legislative changes are possible. As a taxpayer, focus on the rules as they are today – itemize if it benefits you, mind the $10k cap, and explore any state-provided workarounds you qualify for. And stay tuned: a few years from now, the landscape could shift again if the cap expires or if new tax laws are passed.

Avoid These Mistakes When Deducting State Taxes

Claiming the state and local tax deduction can be tricky. Steer clear of these common mistakes to stay compliant and maximize your benefit:

Mistake #1: Deducting state taxes when you took the standard deduction. Remember, if you don’t itemize, you can’t write off state taxes at all. Some taxpayers mistakenly try to list state tax withheld on their federal form without filing Schedule A – that’s not allowed. Choose either standard (no SALT deduction) or itemized (include SALT), not both.

Mistake #2: Forgetting the $10,000 cap. It’s easy to total up all your property tax bills and state income tax and put that number on Schedule A. But the IRS will limit it to $10k (or $5k if MFS). Don’t accidentally over-claim. If you paid, say, $12k in state + local taxes, you should only enter $10k as the deduction. Tax software usually prompts this, but DIY filers need to be cautious.

Mistake #3: Deducting both income tax and sales tax. You have to pick one. A common error is to deduct state income taxes and then also list some big purchase sales taxes separately. The law says you can claim either state/local income taxes or state/local general sales taxes, not both. Choose whichever is larger or more advantageous, and stick with that. (Note: property taxes are separate and you do include those in addition to whichever income/sales tax you chose.)

Mistake #4: Not reporting state tax refunds properly. If you itemize and deduct state income taxes, and then you get a state tax refund the next year, that refund is usually taxable income on your federal return. Why? Because you deducted those taxes, so any refunded portion is like a recovery of a prior deduction. Many people forget this and omit the state refund on the next year’s 1040, which can cause IRS correspondence down the line. (If you took the standard deduction or you didn’t gain a tax benefit from the state deduction, the refund might not be taxable – but the general rule is: if you deducted it last year, report the refund this year.)

Mistake #5: Overlooking property tax limitations and timing. Make sure you only deduct property taxes actually paid in the tax year. If your lender escrows money for property taxes, deduct the amount the lender paid out in that year (usually shown on Form 1098 from the mortgage company), not the amount you sent to escrow (which could differ). Also, if you prepaid future taxes, be aware of IRS rules: prepaying next year’s state income tax (before it’s assessed) won’t count. Prepaying property tax that has been assessed can count, but if you go over the cap it won’t help. In short, don’t try to game the system without understanding the payment must be for a legally imposed tax and still subject to the annual limit.

Mistake #6: Neglecting AMT considerations. If you’re in the income bracket where AMT could apply, know that under the AMT calculation, state tax deductions are disallowed. While fewer people owe AMT now, if you do, that big SALT deduction you claimed on the regular tax might not carry through to your final tax. Plan accordingly – sometimes high state taxes inevitably trigger AMT, eliminating the benefit of the deduction. Work with a tax advisor or use software to see if this affects you.

By avoiding these pitfalls, you can safely navigate the SALT deduction. When in doubt, consult IRS instructions or a tax professional – it’s better to get it right on the first try than to amend a return or face an audit for claiming something incorrectly.

Key Tax Terms Explained

Taxes come with a lot of jargon. Here are some key terms related to deducting state taxes, explained in plain language:

SALT Deduction (State and Local Tax Deduction): This refers to the itemized deduction you can claim for certain state and local taxes paid. It includes state/local income taxes (or sales taxes, if you choose) plus property taxes, up to a combined $10,000 limit. It’s a way to reduce your federal taxable income by the amount of tax you paid to subnational governments.

Standard Deduction: A fixed dollar amount that most taxpayers can subtract from their income without listing any expenses. It’s basically a free pass – if you don’t itemize, you take the standard deduction based on your filing status. For example, in 2023 a married couple gets $27,700. It simplifies taxes by covering typical deductions in one lump sum. You can’t deduct SALT on top of this; it’s one or the other.

Itemized Deductions: These are specific expenses the tax code allows you to subtract from income in lieu of the standard deduction. They are reported on Schedule A. Common itemized deductions include SALT, mortgage interest, charitable contributions, and medical expenses (over a threshold). You add them all up – if the total is more than your standard deduction, itemizing can lower your tax bill more.

$10,000 Cap (SALT Cap): The maximum amount of state and local taxes you can deduct in a year, set by law from 2018 through 2025. It doesn’t matter if you paid $50k in state taxes – you’re capped at $10k for the deduction ($5k if married filing separately). This cap drastically reduced the value of the SALT deduction for many taxpayers in high-tax areas.

Schedule A (Form 1040): The attachment to your federal tax return where you list itemized deductions. If you’re deducting state taxes, they’ll appear on Schedule A (lines 5a–5e in recent versions). Schedule A then flows into your Form 1040, replacing the standard deduction line. If you don’t file a Schedule A, that means you took the standard deduction and didn’t itemize.

Pass-Through Entity (PTE) Tax: A state-level tax election for businesses like S-corps and partnerships designed as a workaround to the SALT cap. It allows the business to pay state tax on its income, which the business can deduct on its federal return. The owners then get a credit on their state taxes. It “passes through” the state tax deduction to the entity level where it isn’t capped at $10k. Only relevant if you have business income in a state that offers this.

Alternative Minimum Tax (AMT): A parallel tax system that ensures high-income people pay at least a minimum tax. Under AMT rules, you can’t deduct state and local taxes (among other preferences), so sometimes people with big SALT deductions end up owing AMT which wipes out the benefit. The TCJA made AMT less common by raising exemptions, but for those still in AMT territory, the SALT deduction effectively vanishes.

Tax Cuts and Jobs Act (TCJA) of 2017: The federal tax reform law that introduced the $10k SALT cap (and doubled the standard deduction, among many other changes). When we refer to “pre-TCJA” vs “post-TCJA” rules, this law is the dividing line. Many provisions of TCJA, including the SALT cap and higher standard deduction, are temporary and set to expire after 2025.

Understanding these terms will help you navigate discussions about deducting state taxes – whether you’re reading IRS forms or consulting a tax advisor, you’ll be equipped to follow along.

Frequently Asked Questions (FAQ)

Q: Can I deduct my state income taxes if I take the standard deduction?
A: No. If you claim the standard deduction, you cannot separately write off state or local taxes. The state tax deduction is only available when you itemize on Schedule A instead of taking the standard amount.

Q: Is there a limit to how much state tax I can deduct?
A: Yes. Currently, the SALT deduction is capped at $10,000 per return (or $5,000 if married filing separately). That cap applies to the combined total of state and local income (or sales) taxes, property taxes, and personal property taxes you paid.

Q: What if I live in a state with no income tax?
A: You can deduct state sales taxes instead. The IRS lets you choose between deducting state/local income tax or state/local general sales tax. If your state doesn’t have an income tax (or if sales tax paid was higher), you would deduct sales taxes (using IRS tables plus any big purchase receipts) as part of your SALT deduction.

Q: Can I deduct both property taxes and state income taxes?
A: Yes, to an extent. State and local real estate taxes (property taxes) are deductible in addition to either income or sales tax. All these taxes together count toward the $10k limit. So you can include property tax and either income or sales tax, but the sum of all cannot exceed $10,000 for deduction purposes.

Q: Are my city or local taxes also deductible?
A: Yes. Local taxes like city income taxes or county property taxes are treated the same as state-level taxes. You can include municipal income taxes, county property taxes, etc., in your SALT deduction. Essentially any subnational government tax on income or property can be counted, subject to the overall cap.

Q: If I get a refund of state taxes I deducted, do I have to pay federal tax on that refund?
A: Yes, usually. If you itemized and benefited from deducting those state taxes, the refund is generally taxable income to you in the year you receive it. You’ll get a 1099-G form for the state refund. However, if you didn’t itemize (or took no tax benefit from the deduction), the refund wouldn’t be taxable.

Q: Will the $10,000 SALT cap go away soon?
A: Maybe. The cap is scheduled to expire after tax year 2025, which would restore an unlimited SALT deduction in 2026. But Congress may act before then. There’s ongoing debate, and lawmakers could extend the cap or change the limit. Stay tuned to future tax law updates.

Q: Does the SALT deduction really only help the rich?
A: Mostly, yes. Since the deduction requires itemizing and is capped, it tends to benefit higher-income taxpayers who pay substantial state taxes and have other deductions. Lower and middle-income filers often use the standard deduction (no SALT benefit). That said, even many middle-class homeowners in high-tax states saw some benefit before the cap. The cap’s design was aimed at limiting a benefit that skewed toward higher earners in high-tax areas.

Q: If I own a business, can I get around the SALT cap?
A: Potentially. Many states offer a pass-through entity tax workaround for S-corporation and partnership income. By electing to pay state tax at the business level, the tax becomes a deductible business expense not subject to the $10k cap. You then claim a credit on your state return. This only applies to business income passed through to you; your W-2 wage income or other personal income tax still falls under the cap.