SALT deductions are federal tax write-offs for certain State And Local Taxes (SALT) paid, and the “Big Beautiful Bill” refers to a recent tax proposal that makes big changes to these deductions. In plain terms, SALT deductions let you subtract some of the taxes you pay to your state and city from your income when calculating your federal taxes. This has become a hot topic in tax reform, especially after the 2017 Tax Cuts and Jobs Act (TCJA) put a cap on how much SALT you can deduct. The new “Big Beautiful Bill” (a nickname for a 2025 tax act) revisits those rules to adjust who benefits and by how much.
Quick Facts about SALT Deductions:
- đź“Ś What SALT Means: SALT stands for state and local taxes. This includes state income taxes, local property taxes, and sales taxes that you pay.
- 📌 Federal Tax Deduction: If you itemize deductions on your federal return, you can deduct up to a certain amount of SALT paid, which reduces your taxable income. (If you take the standard deduction, you can’t deduct SALT separately.)
- 📌 TCJA’s $10k Cap: Since 2018, there’s been a $10,000 cap on the SALT deduction (the maximum you can deduct each year, whether single or married filing jointly). Before that, these taxes were fully deductible.
- đź“Ś Who Is Affected: The cap mostly affects people in high-tax states (like New York, California, New Jersey) or those with expensive property, because they often pay far above $10k in state and local taxes.
- 📌 “Big Beautiful Bill” Changes: In 2025, the House passed a bill nicknamed the One Big Beautiful Bill Act, which proposes raising the SALT deduction limit (temporarily to about $40,000) and tweaking the rules so that ultra-high earners don’t get the full benefit.
SALT Deductions 101: What They Are and How They Work
SALT deduction simply means you can write off the state and local taxes you paid when figuring out your federal taxable income. For example, if you paid $7,000 in state income tax and $3,000 in property tax this year, you have $10,000 in SALT — and you could deduct that full amount under the current cap. But if you paid $20,000 in state tax and $10,000 in property tax (total $30,000), you’re only allowed to deduct up to the cap (currently $10k), meaning $20k of your local taxes won’t reduce your federal taxable income.
This deduction exists to prevent double taxation. The idea is that you’ve already given a chunk of your money to the state or city, so the federal government shouldn’t tax you again on that same money. For decades, the federal tax code let taxpayers deduct all their state and local taxes paid. However, you only get this benefit if you itemize deductions (list your deductible expenses like SALT, mortgage interest, etc., on Schedule A) instead of taking the standard deduction; since 2017’s law doubled the standard deduction, far fewer people itemize now (mostly higher-income folks in high-tax areas).
What counts as SALT? State income taxes or sales taxes (you choose one type to deduct), plus property taxes (typically on real estate, and sometimes vehicle property tax). For most people, state income tax and local property tax make up the bulk of SALT deductions. You cannot deduct federal taxes or other fees like garbage collection or car registration fines as SALT. It’s specifically about state/local income, sales, and property taxes.
Federal Treatment of SALT Deductions: From Full Deduction to Cap
At the federal level, SALT deductions have gone from a generous tax break to a limited one in recent years. Here’s a quick history:
- Before 2018: Taxpayers who itemized could deduct unlimited state and local taxes. If you paid $25k to your state and town, you knocked $25k off your federal taxable income. This was seen as a courtesy to states and a way to avoid taxing income twice.
- 2017 – The TCJA Introduces a Cap: The Tax Cuts and Jobs Act, passed under President Trump, put a cap of $10,000 on SALT deductions (only $5,000 if married filing separately). This cap took effect for 2018 and was set to last through 2025. Congress capped SALT mainly to raise federal revenue to offset the cost of other tax cuts in the bill. It also shifted more of the tax burden to people in high-tax, high-income areas, which sparked a political outcry in those states.
- Debate and Impact: After the cap, only about 10% of taxpayers continued itemizing deductions (because the new higher standard deduction was often more beneficial). Those 10% are largely higher earners. The SALT cap hit especially hard in states like NY, NJ, CA, IL – places with high state income taxes and property values. Many middle-class families in those states found they could no longer deduct all their property taxes or state income taxes beyond $10k, potentially raising their federal tax bill. On the other hand, the majority of taxpayers nationwide weren’t using the SALT deduction at all (they took the standard deduction instead), so they didn’t feel a direct change.
- Build Back Better Proposal (2021): Fast-forward to the Biden administration – there was a big push by some lawmakers to ease the SALT cap. The House’s Build Back Better bill (which ultimately didn’t become law in that form) proposed raising the cap to $80,000 through 2030. Another idea floated in the Senate was to waive the cap entirely for taxpayers earning under $400k, while keeping it for the very rich. These efforts showed that SALT deductions were still a hot issue, though critics pointed out that raising the cap mainly helps wealthy taxpayers.
- 2025 – The “Big Beautiful Bill” Act: In 2025, with renewed focus on extending tax cuts, the House passed the One Big Beautiful Bill Act (cheekily named) which includes a compromise on SALT. Instead of eliminating the cap, it would raise the cap to $40,000 starting in 2025. However, not everyone would get that full $40k: once your income goes above around $500,000, the allowed deduction starts to phase down toward the original $10k cap. The bill also plans to index that $40k limit to grow slightly each year (about 1%), but eventually clamp it at a permanent level (in the low $40-thousands) after several years. In short, the “Big Beautiful Bill” gives a temporary SALT deduction boost for most folks who were capped, but tries to prevent multi-millionaires from getting too big a windfall.
Key point: If Congress does nothing, the current $10,000 cap will disappear after 2025 (sunset), meaning SALT deductions would go back to being unlimited in 2026. Many recent proposals, though, assume some cap will continue because completely removing it would largely benefit the top 1% and blow a hole in the budget. The debate in Washington is how high the cap should be and who should benefit.
States Strike Back: SALT Cap Workarounds
High-tax states didn’t sit quietly after the SALT cap came into play. Several state governments looked for workarounds to help their residents get back some of that federal tax break:
- Charitable Credit Workaround (Failed): A few states (like New York, New Jersey, California) tried to let taxpayers “donate” to special state charitable funds instead of paying state taxes, in return for a big state tax credit. The idea was you’d write off that payment as a charitable donation on your federal return (which isn’t capped) rather than as a state tax (which is capped). The IRS quickly shot this down with regulations – if you get a state tax credit for your “donation,” you can’t double-count it as a charity deduction. So that loophole was largely closed.
- Pass-Through Entity Tax (Successful Workaround): A more technical but effective workaround emerged for small business owners. Over 30 states passed laws allowing pass-through entities (like S-corporations, partnerships, LLCs that are taxed on owners’ returns) to pay state taxes at the business level. This works because business taxes aren’t subject to the $10k cap – for example, if a partnership pays a hefty state tax bill at the entity level, the partnership deducts it fully and the owners get a credit on their personal state returns. In the end, the state still gets its money, and the owners effectively convert what would have been a capped personal SALT deduction into a full business expense deduction. The IRS blessed this workaround in 2020, making it a popular strategy for many entrepreneurs and professionals in high-tax states.
- States Lowering Taxes? Some high-tax states complained that the SALT cap put pressure on them to cut state taxes or risk losing residents to lower-tax states. There’s been political talk about people moving from, say, New York to Florida because they can’t deduct NY’s high taxes anymore. In reality, while there’s some anecdotal evidence of migration, most people weigh many factors beyond just tax deductions. Still, the cap did intensify conversations in state capitols about competitiveness and tax rates.
In the “Big Beautiful Bill,” Congress even addressed these workarounds: the bill would disallow certain deductions if they’re basically fees paid in exchange for state tax benefits (aimed at shutting down creative end-runs around the cap). It also singles out some professional service businesses (like law or accounting firms) to prevent them from exploiting the pass-through SALT deduction too aggressively. These measures show how contentious and significant the SALT issue became at both federal and state levels.
Winners and Losers: How the SALT Cap Affects Different Taxpayers
The impact of SALT deductions (and the cap on them) isn’t one-size-fits-all. It varies a lot based on your income, where you live, and whether you own a business:
- Average Individuals & Families: If you’re a typical taxpayer who takes the standard deduction, the SALT cap doesn’t directly affect you — you weren’t deducting those taxes separately anyway. Many middle-income homeowners even in pricey areas now use the higher standard deduction instead of itemizing. However, if you own a home in a high-tax area and your property tax plus state income tax well exceed the standard deduction, you might itemize and hit the cap. For example, a family in New Jersey with $15k in property tax and $10k in state income tax ($25k total SALT) currently can only deduct $10k, so they pay federal tax on $15k of income that used to be shielded.
- Small Business Owners: For owners of pass-through businesses (like an LLC or S-Corp), state taxes on business profits flow through to personal taxes — meaning the $10k SALT cap could bite into what’s essentially a business expense. Many such business owners (think of a medical practice or a small firm) now use the pass-through entity tax workaround mentioned above. By paying the state through their business, they fully deduct those taxes as a business cost and avoid the individual cap. If a state offers this option, a savvy business owner can save thousands in federal tax; if not, those high state tax payments above $10k remain nondeductible, making doing business there more expensive.
- High Earners: Generally, the higher your income (especially if you live in a high-tax area like New York City or Silicon Valley), the more you pay in state and local taxes – so the SALT cap hits you the hardest. These taxpayers get the most benefit from raising the cap; for example, increasing the limit to $40k would let a wealthy household deduct an extra $30k of SALT, saving them over $10k on their federal taxes (at about a 35% tax rate). By contrast, someone who pays only $5k in state taxes wasn’t impacted by the cap to begin with and gains nothing from a higher limit. This is why critics often label SALT cap relief as a giveaway to the rich, while proponents (especially from high-tax states) argue it helps upper-middle-class families in expensive regions.
To illustrate, here are a few real-world SALT deduction scenarios under current law:
| Taxpayer Scenario | SALT Deduction Outcome (Under $10k Cap) |
|---|---|
| Single filer in Texas with $8,000 in property taxes (no state income tax) | Can deduct all $8,000 of those taxes (below the cap), assuming they itemize. |
| Married couple in New York paying $20,000 in state income tax + $15,000 in property tax | Limited to deducting $10,000 of that $35,000 total. The remaining $25k is not deductible, increasing their taxable income. |
| Small business owner in California with $30,000 state tax on business income, using a pass-through entity tax election | The business pays the $30k to the state and deducts it fully as a business expense. The owner isn’t subject to the $10k cap on that amount at all. |
As shown above, the SALT cap doesn’t matter for some (the Texan with lower taxes, or anyone who doesn’t itemize), but it significantly raises taxes for others (the NY couple) unless they find a workaround (the CA business owner).
Legal Battles: Why States Sued (and Lost) Over the SALT Cap
The SALT deduction cap stirred up not just political fights but also legal challenges. In 2018, four states (New York, New Jersey, Connecticut, Maryland) sued the federal government, arguing that the $10k cap was unconstitutional. They claimed it unfairly targeted certain states and interfered with states’ rights to set their own tax policies. This case, often spearheaded by New York’s officials, essentially said the federal government was punishing blue states that have higher taxes.
Outcome: The courts disagreed with the states. A federal judge dismissed the case, and in 2021 the U.S. Court of Appeals for the Second Circuit upheld that decision, firmly stating that Congress can impose a SALT deduction cap. By 2022, the Supreme Court declined to hear the case, effectively letting the cap stand. The legal reasoning was that the federal government isn’t obligated to offer any deduction for state taxes at all (it’s a legislative choice, not a constitutional right). So, while the SALT cap might be politically controversial, it wasn’t deemed illegal.
Aside from that big multi-state lawsuit, there haven’t been successful legal challenges to SALT cap rules. The IRS has broad authority to regulate tax deductions, so when it nixed the charitable credit workaround, that stood. The pass-through entity workaround was explicitly permitted by the IRS, so it’s legally solid. If Congress changes SALT rules (like in the Big Beautiful Bill), those new rules could themselves be debated politically, but they’re within Congress’s power to enact.
Pros and Cons of SALT Deductions and Caps
Like any major tax policy, the SALT deduction (and the decision to cap it) comes with pros and cons. Here’s a quick breakdown:
| Pros of Allowing More SALT Deduction | Cons of Allowing More SALT Deduction |
|---|---|
| Prevents double taxation of income by letting taxpayers subtract state/local taxes before paying federal tax. | Benefits mostly high earners – the majority of the tax break goes to wealthy individuals in high-tax states, not the middle class. |
| Eases the tax burden in high-cost states, helping residents afford living in areas with expensive public services. | Reduces federal revenue by tens of billions, which can increase the deficit or force cuts elsewhere. |
| Respects state policy choices (people aren’t overly penalized on their federal tax for their state’s higher taxes). | Effectively acts as a federal subsidy to high-tax states – taxpayers in low-tax states don’t get as much benefit, yet federal coffers shrink. |
| Encourages homeownership and local investment (property taxes and local taxes remain at least partly deductible, which can incentivize local spending). | Could prompt some states or localities to raise taxes knowing the federal deduction softens the blow, leading to potentially higher state/local spending. |
| Provides some tax planning flexibility (e.g. business owners can use workarounds to manage their tax liability). | Adds complexity – taxpayers must navigate itemizing vs. standard deduction and new workaround rules. There’s also a sense of unfairness between those who can fully deduct and those who can’t. |
In short, supporters of expanding the SALT deduction say it’s about fairness for taxpayers who already pay a lot locally, while opponents say it’s a giveaway to the rich and a budget buster.
Common Mistakes and Misconceptions to Avoid
Even seasoned taxpayers get tripped up by the SALT deduction rules. Here are some common mistakes to watch out for:
- ❌ Assuming Everyone Can Deduct SALT: Only those who itemize deductions can claim SALT. If you take the standard deduction (which most people do now), you get no extra break for state/local taxes.
- ❌ Counting the Wrong Taxes: Remember that only state and local income taxes (or sales taxes) and property taxes count toward the SALT deduction. You cannot deduct things like your federal income tax, Social Security tax, gasoline taxes, or local service fees as part of SALT.
- ❌ Overlooking the $10k Limit: It might sound obvious, but some folks forget the cap and assume all their local taxes are deductible. In reality, if you paid $12k in property tax and $8k in state income tax, you can’t deduct $20k — you’re stuck at $10k. Plan for that when budgeting your tax bill.
- ❌ Ignoring the Marriage Penalty: The $10k cap is the same whether you’re single or married filing jointly. Two unmarried people could deduct $10k each (total $20k) on separate returns, but a married couple filing together is capped at $10k total. This catches some couples by surprise.
- ❌ Not Using Workarounds (if Available): If you’re a business owner and your state offers a pass-through entity tax workaround, consider it. Many eligible business owners miss the chance to save on federal taxes simply because they didn’t elect their state’s PTE option.
- ❌ Mixing Up Credits and Deductions: A SALT deduction is not a dollar-for-dollar tax credit. For example, a $1,000 deduction might save you about $240 in tax if you’re in a 24% bracket. Some people mistakenly think $1,000 less income means $1,000 less tax – in fact, it just reduces your taxable income, not your actual tax owed by the full amount.
Key Terms and Entities in the SALT Debate
To fully grasp the SALT deduction discussion, it helps to know some of the key players and terms:
- Internal Revenue Service (IRS): The U.S. tax authority that enforces tax laws and issues guidance. The IRS set regulations that blocked certain SALT cap workarounds (like the charity credit schemes) and approved others (like pass-through entity taxes).
- U.S. Department of the Treasury: The federal department in charge of national finance and taxation policy (the IRS is part of Treasury). Treasury Secretaries (e.g. Steven Mnuchin under Trump, Janet Yellen under Biden) often weigh in on big tax issues like SALT during policy debates.
- Congress: The U.S. legislature (House and Senate) that writes tax laws. The SALT cap came from Congress in the 2017 TCJA, and any change (like the Big Beautiful Bill’s provisions) must go through Congress. Lawmakers from high-tax states formed a “SALT Caucus” to advocate for raising or repealing the cap.
- Tax Cuts and Jobs Act (TCJA): The 2017 tax reform law under President Trump that, among many changes, imposed the $10,000 SALT deduction cap (effective 2018-2025). It also raised the standard deduction and cut tax rates.
- Build Back Better (BBB) Bill: A large 2021 legislative proposal under President Biden aimed at social programs and tax changes. The House version included relief for the SALT cap (raising it to $80k) to appease certain members from high-tax states. The bill didn’t pass in that form.
- One Big Beautiful Bill Act (OBBBA) of 2025: A tax package passed by the House in 2025 (named with a wink at the phrase “big, beautiful”). It extends many of the TCJA tax cuts and adjusts SALT deductions by raising the cap to $40k (with phase-outs for very high incomes) for the late 2020s.
- Itemized Deduction: Individual expenses allowed by the IRS that can be listed to reduce taxable income (e.g., SALT, mortgage interest, charitable donations). Itemizing is only beneficial if the total of your deductible expenses exceeds the standard deduction amount.
- Standard Deduction: A fixed dollar amount you can deduct from income without listing expenses. TCJA roughly doubled this amount (for 2023, around $13,850 for singles, $27,700 for married joint filers), which is why far fewer people itemize now.
- Pass-Through Entities (PTEs): Business structures like partnerships, S-corporations, and certain LLCs where business income “passes through” to the owners’ personal tax returns (instead of the business paying corporate tax). Many small and mid-sized businesses are PTEs.
- Pass-Through Entity Tax (PTET) Workaround: A state-level tax election that allows a pass-through business to pay state tax at the entity level. This turns what would be personal state tax (subject to the SALT cap) into a business expense (fully deductible), thereby bypassing the federal cap for the owners.
- Alternative Minimum Tax (AMT): A parallel tax system designed to ensure high-income filers pay at least a minimum amount of tax. Before 2018, the AMT often disallowed SALT deductions, so many wealthy taxpayers already lost some SALT benefit. TCJA raised the AMT thresholds, so it hits far fewer people now.
- Key Policymakers: Individuals like President Donald Trump (who championed the TCJA and its SALT cap), President Joe Biden (who supported SALT cap relief efforts), and members of Congress such as Senator Bernie Sanders or Rep. Josh Gottheimer (leaders in the SALT debate) have all shaped the conversation. Additionally, state officials (governors, legislators) in high-tax states have been vocal about the cap, but ultimately it’s federal law that decides SALT deductions.
FAQ: Frequently Asked Questions about SALT Deductions
Q: What exactly is the SALT deduction cap?
A: It’s a limit on how much state and local tax you can deduct on your federal tax return. Currently, the cap is $10,000 per return (the $10k limit applies whether single or married filing jointly).
Q: Why did they cap the SALT deduction in the first place?
A: Congress capped it in 2017 to help pay for tax cuts and to prevent an unlimited tax break that mostly benefited high-income taxpayers. It was a way to raise revenue and target relief elsewhere.
Q: Does the SALT cap affect me if I don’t itemize my taxes?
A: No. If you take the standard deduction, the SALT cap doesn’t come into play at all. The cap only matters if you itemize and have more than $10k in state/local taxes to deduct.
Q: I’m not rich – does raising the SALT cap help me?
A: For most middle-income folks, not really. Raising the cap mainly helps people who are already paying above $10,000 in state and local taxes. If your SALT is below that, you’re unaffected by the cap.
Q: If I paid $8,000 in state taxes and $4,000 in property taxes, how much can I deduct?
A: You can deduct a maximum of $10,000, so in that case $10k out of your $12k total. The remaining $2k is above the cap and can’t be deducted. (If one of those taxes is sales tax instead of income tax, you’d choose whichever is higher – income or sales – plus your property tax.)
Q: Do married couples get to deduct $20k since there are two of us?
A: Unfortunately no – the $10,000 cap is per tax return for joint filers. Married filing separately gives each spouse a $5k cap. So a married couple filing together is still capped at $10k total, not double.
Q: Can I avoid the SALT cap by paying my taxes through my business?
A: Yes – if you own a pass-through business and your state has a PTE tax workaround, you can bypass the cap. But regular W-2 employees can’t use this trick.
Q: What is the “Big Beautiful Bill” in simple terms?
A: It’s a nickname for a 2025 tax law. Essentially, it extends many 2017 tax cuts and raises the SALT deduction cap from $10k to $40k (temporarily, with some income-based limits).
Q: Will the SALT deduction cap go away after 2025?
A: Yes. Under current law the $10k SALT cap expires after 2025, so SALT would be fully deductible in 2026. However, Congress might change this – for example, the Big Beautiful Bill keeps a higher cap instead.
Q: Is the SALT deduction a tax credit or just a deduction?
A: It’s a deduction. That means it reduces your taxable income, not your tax bill dollar-for-dollar. For instance, a $1,000 SALT deduction might save you around $200–$300 in actual tax, depending on your bracket.
Q: What other taxes might I confuse with SALT?
A: Don’t mix up SALT with things like federal income taxes or FICA (Social Security/Medicare taxes) – those aren’t deductible as SALT. Also, personal mortgage interest and charitable donations are separate deductions, not part of SALT.