Is the SALT Cap Increase Permanent? (w/Examples) + FAQs

This article reflects federal rules as of June 2026 and covers tax year 2025 (the return you file in 2026), with 2026 figures noted for planning. Tax law changes — confirm current figures before you file.

Quick Answer

No. The $40,000 SALT deduction cap created by the One Big Beautiful Bill Act is temporary, not permanent. It applies for tax years 2025 through 2029, grows 1% each year, then snaps back to the old $10,000 cap in 2030 — unless Congress acts again before then.

For years, the federal deduction for state and local taxes was locked at $10,000, and that ceiling cost homeowners in high-tax states real money every April. Now the cap is four times higher for tax year 2025, but the relief comes with an expiration date and an income trap that can quietly erase the benefit for higher earners.

The stakes are simple: this is a five-year window. According to the Bipartisan Policy Center, the SALT cap changes will raise nearly $1 trillion from fiscal years 2025 through 2034 — and most of that revenue comes from the cap snapping back to $10,000 in 2030. If you live in a high-tax state, plan around the calendar, not just the number.

Here is what you will learn:

📅 Exactly when the $40,000 cap starts, grows, and expires, and why “permanent” is wrong.
💸 How the hidden income phase-out above $500,000 can cost you a 45.5% marginal rate.
🏠 Worked dollar examples for a New Jersey couple, a California phase-out case, and a retiree.
🗺️ Whether your state lets you deduct these taxes too, plus the PTET workaround for business owners.
✅ The exact form, line, and next steps to claim the bigger deduction for tax year 2025.

This article is educational and is not a substitute for advice from a licensed tax professional about your specific situation. If your income sits near $500,000, you own a pass-through business, or you live in a high-tax state with a PTET election to make, a CPA or tax attorney can save you far more than the fee.

What the SALT Deduction Actually Is

The SALT deduction is the federal write-off for state and local taxes you pay during the year. It lets you subtract certain state and local taxes from your federal taxable income when you itemize deductions on Schedule A of Form 1040. You only get it if your total itemized deductions beat your standard deduction.

Two main kinds of taxes count toward SALT. The first is either your state and local income taxes or your state and local general sales taxes — you pick one, not both. The second is your property taxes, mostly the real estate tax on your home.

Here is the consequence of the cap: even if you pay $60,000 in combined state income and property taxes, the law limits how much you can deduct. Before 2025, that limit was $10,000, so $50,000 of real tax bills gave you no federal benefit at all. That is the squeeze the new law loosens — for now.

A common misconception is that everyone gets this deduction. You do not. As the Bipartisan Policy Center notes, the higher standard deduction means SALT mostly helps higher-earning households who itemize. If your standard deduction is larger than all your itemized deductions combined, the SALT cap never touches you.

What you should do: add up your 2025 state income tax, local taxes, and property tax. If that total plus your other itemized deductions (like mortgage interest and charitable gifts) tops your standard deduction, itemizing is now worth a second look.

The Core Question: Permanent or Temporary?

The $40,000 cap is temporary. The One Big Beautiful Bill Act (OBBBA), signed by President Trump on July 4, 2025, sets the higher cap for a fixed five-year window and writes its own expiration into the statute.

Here is the timeline in plain terms, confirmed by the Bipartisan Policy Center explainer:

For tax year 2025, the cap is $40,000 ($20,000 if married filing separately).
For tax years 2026 through 2029, the cap grows 1% each year. So 2026 is about $40,400.
Beginning in 2030, the cap reverts to $10,000 with no income limits — the same ceiling the 2017 Tax Cuts and Jobs Act set.

So why do some headlines call it “permanent”? Because OBBBA did make several TCJA pieces permanent, and a few outlets blurred the SALT change in with them. That is wrong. The SALT cap increase has a hard sunset after 2029, and the Bipartisan Policy Center flags the “snapback to the $10,000 limit in 2030” directly.

The consequence of believing the “permanent” myth is bad multi-year planning. If you assume $40,000 forever, you might delay a large deductible payment to 2030 — the exact year the cap collapses back to $10,000. A reader who plans around a permanent cap that does not exist can lose tens of thousands in deductions.

What you should do: treat 2025 through 2029 as a use-it-or-lose-it window. Where you have control over timing — a fourth-quarter state estimated payment, a property tax installment — lean toward paying inside the window rather than waiting until 2030.

The Hidden Phase-Out for High Earners

The bigger cap is not for everyone equally. OBBBA adds an income-based phase-out that shrinks the $40,000 cap for high earners, and it creates one of the nastiest marginal-rate traps in the tax code.

Here is the rule, per HCVT’s OBBBA alert. The phase-out starts when your modified adjusted gross income (MAGI) — your adjusted gross income with a few items added back — passes $500,000 ($250,000 if married filing separately) for tax year 2025. Above that line, your cap drops by 30 cents for every $1 of income over the threshold.

The cap never falls below $10,000. So once MAGI hits $600,000 ($300,000 if married filing separately), the phase-out is complete and you are back to a $10,000 cap. Both the $500,000 threshold and the $40,000 cap rise 1% per year through 2029.

Why the 45.5% “SALT Torpedo” Happens

Between $500,000 and $600,000 of MAGI, every extra dollar you earn does two bad things at once. It gets taxed at your regular rate, and it also strips away 30 cents of SALT deduction. Losing that 30 cents of deduction at the 35% bracket costs an extra 10.5 cents of tax on top.

So your effective marginal rate on that slice of income climbs from 35% to about 45.5%. This is the “SALT torpedo.” Earning more inside this band can feel like running uphill, because a chunk of every raise or bonus is eaten by the vanishing deduction.

What you should do about it: if you are inside this $500,000 to $600,000 band, talk to a CPA about timing income. Shifting a bonus, deferring a Roth conversion, or boosting pre-tax 401(k) contributions can pull your MAGI back under the threshold and rescue thousands in deductions.

Worked Examples With Real Dollars

Numbers make this real. These examples use tax year 2025 figures and assume each taxpayer itemizes.

Example 1 — The New Jersey couple under the threshold. Maria and Tom file jointly with $200,000 MAGI. They pay $18,000 in state income tax and $16,000 in property tax, for $34,000 of SALT. Under the old $10,000 cap, they could deduct only $10,000. For tax year 2025, their MAGI is well under $500,000, so they get the full $40,000 cap and deduct all $34,000. That is $24,000 more in deductions. At their 24% bracket, that saves roughly $5,760 in federal tax.

Example 2 — The California phase-out case. David and Priya file jointly with $520,000 MAGI. Their MAGI is $20,000 over the $500,000 threshold. The phase-out cuts their cap by 30% of $20,000, or $6,000. So their cap is $40,000 − $6,000 = $34,000, confirmed by the HCVT example. They pay more than $34,000 in SALT, so they deduct $34,000 — still far better than $10,000.

Example 3 — The high-income couple who gets nothing extra. James and Lena file jointly with $620,000 MAGI. Because their MAGI tops $600,000, the phase-out is complete and their cap is floored at $10,000. They pay $50,000 in SALT but deduct only $10,000 — exactly what they got before OBBBA. The bigger cap gives them no benefit at all.

Which Situation Applies to You?

The right move depends on your income and where you live. Find your row.

MAGI under $500,000 in a high-tax state. You are the biggest winner. The full $40,000 cap likely makes itemizing beat the standard deduction. Focus on the timing window before 2030.
MAGI between $500,000 and $600,000. You are in the SALT torpedo. Read the phase-out section twice and look at income-timing moves with a pro.
MAGI above $600,000. Your cap is stuck at $10,000. The PTET workaround for business income is your main remaining lever.
You take the standard deduction. The SALT cap does not affect you at all unless your itemized total now beats your standard deduction — recheck that math for 2025.
You own a pass-through business. The state PTET election may move state tax off your personal return entirely, sidestepping the cap. See the PTET section.

Does Your State Follow This Rule?

Start with the federal point: the SALT cap is a federal rule. It limits what you deduct on your federal return only. Your state does not impose the SALT cap on your state return, because states do not let you deduct their own taxes from their own tax base in the first place.

So the question “does my state conform?” works differently for SALT than for other OBBBA deductions. The bigger cap simply does not change your state income tax. What it changes is your federal bill, and the Bipartisan Policy Center found the benefit concentrates in California, Connecticut, Maryland, New York, Illinois, Minnesota, and New Jersey — the high-tax states where residents pay the most SALT.

The consequence is geographic. A homeowner in Texas or Florida, which have no state income tax, often cannot reach even the old $10,000 cap with property tax alone, so the increase may mean little. A homeowner in New York or New Jersey, paying $30,000-plus in combined taxes, can capture the full benefit.

What you should do: confirm your state still uses the federal itemize-or-standard choice for its own return. Some states force you to itemize on the state return only if you itemized federally, so a federal switch to itemizing can have a small state ripple. Check your state tax agency’s guidance before you file.

The PTET Workaround for Business Owners

The pass-through entity tax (PTET) is a state-level workaround that survived OBBBA untouched. It lets a partnership or S corporation pay state income tax at the entity level, where it is a fully deductible business expense not subject to the SALT cap.

Here is how it helps, per the HCVT alert: instead of the owner paying state tax personally and hitting the $40,000 federal cap, the business pays it and deducts it in full before profit flows to the owner. This converts otherwise capped state tax into an uncapped federal deduction. For an owner above the $600,000 phase-out, where the personal cap is just $10,000, this is often the single biggest SALT play available.

The catch: this only works for pass-through business income, the election rules and deadlines vary by state, and some state PTET regimes were scheduled to sunset on December 31, 2025, unless extended, per HCVT. Wages and W-2 income do not qualify.

What you should do: if you own a partnership or S corp in a state with a PTET regime, ask your CPA whether the election still makes sense and whether your state’s program is still active for 2025 and 2026. The election usually must be made by a state deadline, and missing it forfeits the deduction for the year.

Old Cap vs. New Cap

Feature	Old Rule (TCJA, through 2024)	New Rule (OBBBA, 2025–2029)
Maximum deduction	$10,000 ($5,000 if MFS)	$40,000 in 2025 ($20,000 if MFS), +1% yearly
Income phase-out	None	30% above $500,000 MAGI ($250,000 MFS)
Floor for high earners	$10,000 for everyone	$10,000 once MAGI tops $600,000
Expiration	Was set to expire end of 2025	Reverts to $10,000 in 2030
Must you itemize?	Yes	Yes

Three Common Scenarios

Scenario A — Upper-middle-income homeowner in a high-tax state.

Your Move	What It Means for Your Taxes
Itemize for 2025 and deduct full SALT up to $40,000	You capture up to $30,000 more in deductions than the old cap allowed, often worth thousands in tax savings
Keep taking the standard deduction without checking	You may leave a large deduction on the table because your itemized total now beats the standard amount

Scenario B — Earner inside the $500,000–$600,000 phase-out band.

Your Move	What It Means for Your Taxes
Time income to stay under $500,000 MAGI	You keep the full $40,000 cap and dodge the 45.5% torpedo on that income slice
Trigger a large bonus or Roth conversion that lifts MAGI	Every extra dollar shrinks your cap by 30 cents, raising your effective marginal rate

Scenario C — Pass-through business owner above $600,000 MAGI.

Your Move	What It Means for Your Taxes
Make a timely state PTET election	State business tax becomes a full federal deduction, bypassing your $10,000 personal cap
Pay state tax personally and rely on Schedule A	Your deduction is floored at $10,000 and the bigger cap gives you no benefit

Mistakes to Avoid

Believing the cap is permanent. It sunsets after 2029, so multi-year plans built on a forever-$40,000 cap can backfire when the cap drops to $10,000 in 2030.
Forgetting the phase-out. Assuming a full $40,000 at $560,000 MAGI overstates your deduction and can lead to an underpayment and penalty.
Deducting both income and sales tax. You may deduct state income tax or state general sales tax, not both — claiming both overstates your deduction.
Itemizing when the standard deduction is bigger. If your itemized total is below the standard deduction, itemizing for SALT costs you money.
Ignoring married-filing-separately limits. The cap is only $20,000 per spouse and the phase-out starts at $250,000 — couples who split filing can lose deduction room.
Missing the state PTET deadline. PTET elections have firm state deadlines; miss one and the workaround is gone for that year.
Counting federal income tax as SALT. Only state and local taxes qualify; federal income tax never counts toward the deduction.

Do’s and Don’ts

Do anchor every plan to a tax year, because the cap and the threshold both change each year through 2029.
Do run the itemize-versus-standard math fresh for 2025, since the bigger cap flips the answer for many filers.
Do track your MAGI if you are near $500,000, because crossing it quietly cuts your deduction.
Do ask about a PTET election if you own a pass-through, since it can rescue deductions the cap blocks.
Do keep receipts for property tax and state tax payments, because the IRS can ask you to prove every dollar.
Don’t assume your high-tax state changes its own return because of this federal cap — it does not.
Don’t wait until 2030 to make large deductible payments you can make now, because the window closes.
Don’t forget sales tax is an option if you live in a no-income-tax state, since it may be your only SALT.
Don’t rely on a blog headline calling the change “permanent” — read the statute’s sunset.
Don’t ignore the AMT entirely, though the phase-out makes its effect on SALT limited for most filers.

Pros and Cons of the New SALT Cap

Pro: The cap quadruples for 2025, freeing large deductions for high-tax-state homeowners who were stuck at $10,000.
Pro: It makes itemizing worthwhile again for many upper-middle-income filers.
Pro: The PTET workaround stays intact, helping business owners above the phase-out.
Pro: The cap nudges up 1% a year, giving a small inflation cushion through 2029.
Pro: Most filers escape AMT interference because the phase-out limits the overlap.
Con: It is temporary and reverts to $10,000 in 2030, complicating long-range planning.
Con: The phase-out creates a punishing 45.5% marginal rate between $500,000 and $600,000.
Con: High earners above $600,000 get no benefit at all.
Con: It only helps people who itemize, leaving standard-deduction filers out.
Con: Married-filing-separately couples face halved caps and thresholds.

What to Do Next

Add up your 2025 state income (or sales) tax plus property tax to find your total SALT.
Compare your full itemized total against your 2025 standard deduction, and itemize only if it wins.
Estimate your MAGI; if it is between $500,000 and $600,000, apply the 30% phase-out before you claim a number.
Gather your property tax bills and state tax payment records to back up the deduction.
Claim the deduction on Schedule A, line 5, and carry the total to Form 1040 by the April 15, 2026 deadline for tax year 2025.
If you own a pass-through business or sit in the phase-out band, call a CPA now, well before any state PTET election deadline.

FAQs

Is the SALT cap increase permanent?

No. The $40,000 cap is temporary. It runs for tax years 2025 through 2029, rising 1% a year, then reverts to the prior $10,000 cap in 2030 under the One Big Beautiful Bill Act.

How much is the SALT deduction cap for 2025?

$40,000 for most filers ($20,000 if married filing separately) for tax year 2025. The cap rises about 1% per year, reaching roughly $40,400 for tax year 2026.

When does the new SALT cap expire?

After tax year 2029. Beginning in 2030, the cap snaps back to $10,000 for everyone, with no income limits, unless Congress passes a new law before then.

At what income does the SALT cap phase out?

$500,000 MAGI ($250,000 if married filing separately) for tax year 2025. Above that, the cap drops 30 cents per dollar until it floors at $10,000 around $600,000 MAGI.

Do I have to itemize to claim the SALT deduction?

Yes. You must itemize on Schedule A. If your standard deduction is larger than your total itemized deductions, you cannot benefit from the higher SALT cap.

Does my state follow the new federal SALT cap?

No. The SALT cap is a federal limit on your federal return only. It does not change your state income tax, since states do not let you deduct their own taxes against their own base.

What is the SALT torpedo?

A spike in your marginal rate. Between $500,000 and $600,000 MAGI, each extra dollar loses 30 cents of deduction, pushing your effective rate to about 45.5% on that income.

Can married couples filing separately use the higher cap?

Yes, but it is halved. Each spouse gets a $20,000 cap for 2025, and the phase-out starts at $250,000 MAGI instead of $500,000.

Does the PTET workaround still work after OBBBA?

Yes. OBBBA left the pass-through entity tax workaround unchanged. Owners of partnerships and S corps can still shift state tax to the entity for a full federal deduction, subject to state rules.

Can I deduct both state income tax and sales tax?

No. You choose one — state and local income tax or general sales tax — plus your property tax. You cannot claim income and sales tax in the same year.

What form do I use to claim the SALT deduction?

Schedule A (Form 1040). Report state and local taxes on line 5, then carry your total itemized deductions to Form 1040 by the April 15, 2026 filing deadline for tax year 2025.

Will the cap really drop back to $10,000 in 2030?

Yes, under current law. SALT remains politically contested, so Congress may revisit it, but as written today the cap reverts to $10,000 in 2030 with no income limits.

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

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