When Does the SALT Cap Revert to $10,000? (w/Examples) + FAQs

This article reflects federal rules as of June 2026 and covers tax years 2025 through 2030. Tax law changes — confirm current figures before you file. This guide is educational and is not a substitute for advice from a licensed tax professional for your specific situation.

Quick Answer

The SALT deduction cap reverts to $10,000 on January 1, 2030. Under the One Big Beautiful Bill Act, the cap is $40,000 for tax years 2025 through 2029 (rising 1% each year), then drops back to the old $10,000 limit ($5,000 if married filing separately) for tax year 2030 and after.

For now, you get a bigger break. Starting with your 2025 return, you can deduct up to $40,000 of state and local taxes if you itemize, which is four times the old $10,000 limit that capped your deduction from 2018 through 2024. That higher number holds, with small yearly bumps, only through 2029 — and then it falls off a cliff back to $10,000 in 2030.

The clock matters because this is a temporary window, and the date is already in the law. Roughly 90% of taxpayers now claim the standard deduction rather than itemize, but high-tax-state homeowners who itemize stand to save thousands a year while the $40,000 cap lasts — and to lose most of that benefit the moment 2030 arrives.

💸 The exact year the $40,000 cap turns back into $10,000, so you can plan before the deadline.
📉 How the income phase-out shrinks your deduction once your MAGI passes $500,000.
🧮 Fully worked dollar examples showing what you save now versus after 2030.
🗺️ Whether your state’s PTET workaround can rescue your deduction after the cap reverts.
⚠️ The costly mistakes — AMT traps, the married-filing-separately penalty, and missed elections — that erase your savings.

What the SALT Cap Is and Why $10,000 Matters

The SALT deduction lets you subtract certain state and local taxes from your federal taxable income, but only if you itemize on Schedule A of Form 1040. “SALT” stands for State And Local Taxes. The deduction covers three buckets of taxes you already pay: state and local income taxes (or sales taxes — you pick one, not both), real estate property taxes on homes and land, and personal property taxes on items like cars and boats, as the IRS explains for Schedule A.

The “cap” is a hard dollar limit on how much of those taxes you can deduct. Before 2018, there was no cap at all — if you itemized, your state and local taxes were generally 100% deductible. That changed with the 2017 Tax Cuts and Jobs Act (TCJA), which set the cap at $10,000 ($5,000 for married filing separately) for tax years 2018 through 2024. The consequence was real money: a New Jersey homeowner paying $30,000 in property and state income taxes could deduct only $10,000 and lost the federal benefit on the other $20,000.

That $10,000 number matters because it is the floor the law returns to. The current $40,000 cap is the exception, not the rule. The $10,000 cap was scheduled to expire after 2025, but instead of letting it vanish, Congress used the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, to temporarily raise it — and then to reinstate the same $10,000 limit starting in 2030.

A common misconception is that the SALT deduction lets you deduct any tax you pay your state. It does not. You cannot deduct federal income tax, gas taxes, utility taxes, or special local assessments for sidewalks and sewers, and you cannot deduct both income tax and sales tax in the same year. Knowing what counts prevents you from overstating Schedule A and drawing IRS scrutiny.

What you should do: pull last year’s Schedule A and add up your property tax plus state income tax. If that total is well above $10,000, the timing of the 2030 reversion affects you directly, and the rest of this guide is built for your situation.

The Exact Timeline: 2025 Through 2030

The reversion is not a surprise hidden in fine print — it is a fixed calendar written into the statute. Here is the year-by-year path the cap follows under the OBBBA, as summarized by Thomson Reuters tax analysts.

Tax Years 2025–2029: The $40,000 Window

For tax year 2025, the cap is $40,000 for single, head of household, qualifying surviving spouse, and married-filing-jointly filers, and $20,000 for married filing separately. The cap then grows by 1% each year through 2029, so it is roughly $40,400 in 2026, about $40,804 in 2027, and so on, as H&R Block summarizes the schedule. The income phase-out threshold also rises 1% per year over the same period.

The consequence of this window is a five-year planning runway. A homeowner in a high-tax state can deduct four times what they could in 2024, which can mean thousands of dollars in annual federal tax savings. The misconception to avoid is treating the 1% bumps as meaningful — they are tiny, so do not build a plan around the cap “growing” much. What you should do is treat 2025 through 2029 as a use-it-or-lose-it benefit and front-load deductible payments where the rules allow.

Tax Year 2030: Back to $10,000

For tax year 2030, the cap reverts permanently to $10,000 ($5,000 for married filing separately), exactly the TCJA-era limit, as Creative Planning notes on the sunset. “Permanently” here means there is no further scheduled increase written into current law — it stays at $10,000 unless Congress passes a new bill.

The consequence is a sharp cliff, not a gentle slope: a filer deducting $40,000 in 2029 can deduct only $10,000 in 2030, losing the federal benefit on $30,000 of taxes. The misconception is that the cap “phases down” gradually into 2030 — it does not; the drop happens all at once on January 1, 2030. What you should do is plan any large, controllable deductible payments (like a prepaid, already-assessed property tax bill) for a year you are inside the $40,000 window rather than after it closes.

How the Income Phase-Out Shrinks Your Cap

The $40,000 cap is not the same for everyone — high earners get less. Once your modified adjusted gross income (MAGI) crosses a threshold, your cap shrinks by 30 cents for every dollar of income above the line, until it bottoms out at the old $10,000 floor, as Doeren Mayhew details with worked math.

For tax year 2025, the phase-out starts at $500,000 MAGI ($250,000 if married filing separately). The cap drops by 30% of the excess over $500,000, and by the time MAGI reaches $600,000, the cap has fallen all the way back to $10,000. So a household earning $600,000 or more in 2025 is effectively already living under the post-2030 cap, even before the reversion.

The consequence is a brutal “SALT torpedo” — a band of income between $500,000 and $600,000 where each extra dollar earned can cost you both income tax and lost deduction, pushing your effective marginal rate sharply higher, a risk KLR flags as a hidden phaseout. A common misconception is that the phase-out wipes out your deduction entirely — it does not; it never falls below $10,000, the same amount you would get anyway. What you should do is manage your MAGI: pretax retirement and HSA contributions can pull you back under $500,000 and rescue thousands in deductions.

Worked Examples: What You Save Now vs. After 2030

Here is the math, step by step, so you can copy it for your own return. Assume each taxpayer itemizes and is in the 35% federal bracket.

Example 1 — Full $40,000 Deduction (under the threshold)

David, single, lives in Illinois with $42,000 of combined state income and property taxes and a MAGI of $300,000.

2025 deduction: capped at $40,000.
Extra deductible vs. the old cap: $40,000 − $10,000 = $30,000.
Tax saved vs. 2030 rules: 35% × $30,000 = $10,500 per year.
In 2030, his cap is $10,000, so that $10,500 annual savings disappears.

Example 2 — Phased-Down Deduction (high earner)

Maria, single, lives in New Jersey with $45,000 of SALT and a MAGI of $550,000 in 2025.

Excess over $500,000 threshold: $550,000 − $500,000 = $50,000.
Cap reduction: 30% × $50,000 = $15,000.
Her 2025 cap: $40,000 − $15,000 = $25,000.
Extra deductible vs. old cap: $25,000 − $10,000 = $15,000.
Tax saved: 35% × $15,000 = $5,250 per year — still real money, but half of David’s.

Example 3 — Past the Phase-Out (no benefit left)

The Chen family, married filing jointly in California, $80,000 of SALT and a MAGI of $620,000 in 2025.

MAGI exceeds $600,000, so the cap is fully phased down to $10,000.
Their 2025 deduction equals the post-2030 amount — the reversion changes nothing for them.
For the Chens, a PTET workaround (below) is the only path to a larger deduction.

Which Situation Applies to You?

The right move depends on who you are. Find your row before reading further.

You take the standard deduction: The SALT cap may not affect you at all — for 2025 the standard deduction is $15,750 single and $31,500 married filing jointly, per Doeren Mayhew. Itemize only if your SALT plus mortgage interest and charity beat that.
You itemize, MAGI under $500,000: You likely capture the full or near-full $40,000 cap. Front-load deductible payments before 2030.
You itemize, MAGI $500,000–$600,000: You are in the SALT torpedo. Managing MAGI is your highest-value move.
You itemize, MAGI over $600,000: Your cap is already $10,000. Look hard at a PTET election.
You own a pass-through business: A state PTET election may sidestep the cap entirely, before and after 2030.

The PTET Workaround Survives the Reversion

The most important planning tool is the Pass-Through Entity Tax (PTET), and it does not expire in 2030. More than 30 states let owners of S corporations and partnerships pay state income tax at the entity level, where it is a fully deductible business expense not subject to the $10,000 individual SALT cap, a structure J.P. Morgan describes as the SALT workaround.

Here is how it works in plain terms: instead of you paying $50,000 of state tax personally (where only $10,000 would be deductible after 2030), your business pays it and deducts the full $50,000 federally, then passes a credit through to your personal state return. The consequence is that business owners can keep deducting their full state tax even when wage earners are stuck at $10,000.

A common misconception is that PTET helps everyone — it does not. It only helps owners of eligible pass-through entities, not W-2 employees or most rental property held personally. And the OBBBA preserved PTET for most service and non-service businesses, so it remains a live strategy past 2030. What you should do: if you own a pass-through, ask your CPA before your state’s annual PTET election deadline — many states require the election early in the tax year, and missing it forfeits the benefit for that whole year.

Does Your State Follow the Federal Cap?

State conformity is separate from federal law, and it varies. The $40,000 federal cap and its 2030 reversion apply to your federal return only. Whether your state return is affected depends on your state’s own rules and whether it offers a PTET election, which Anchin notes differs widely by state.

Seven states have no individual income tax at all — including Florida, Texas, Washington, and Nevada — so SALT planning there centers on property tax, not income tax. High-tax states like New York, New Jersey, and California are where the cap bites hardest and where PTET elections are most valuable. The consequence of ignoring conformity is paying for a strategy that your specific state does not support. What you should do is check your state Department of Revenue page for its PTET rules and election deadline before you rely on the workaround.

High-Tax State Planning Point	Why It Matters
NY, NJ, CA itemizers feel the cap most	Combined property and income taxes often far exceed $40,000, so the 2030 reversion costs them the most.
These states offer PTET elections	Business owners can deduct full state tax at the entity level, surviving the 2030 cliff.
No-income-tax states (FL, TX, WA)	SALT planning focuses on property tax only; the income-tax piece does not apply.

Scenario Tables

These three situations capture the most common ways the reversion plays out.

Scenario A — High-tax-state itemizer, moderate income

Your Move	What Happens
Deduct $40,000 of SALT in 2025–2029	You save thousands yearly versus the old $10,000 cap.
Take no action before 2030	Your cap drops to $10,000 and the federal benefit on $30,000 vanishes.

Scenario B — High earner in the phase-out band

Your Move	What Happens
Let MAGI sit at $550,000	Cap shrinks to $25,000; you lose part of the deduction.
Cut MAGI under $500,000 with pretax savings	You restore the full $40,000 cap and avoid the SALT torpedo.

Scenario C — Pass-through business owner

Your Move	What Happens
Make a timely PTET election	Full state tax stays deductible at the entity level, before and after 2030.
Miss the state election deadline	You fall back to the $10,000 individual cap for the whole year.

Mistakes to Avoid

Assuming the $40,000 cap is permanent. It reverts to $10,000 in 2030, and building a long-term plan on it backfires.
Forgetting the income phase-out. A MAGI over $500,000 quietly shrinks your cap, so a $40,000 expectation can become $25,000 or less.
Triggering the AMT. SALT is not deductible for the alternative minimum tax, and a large SALT deduction can push you into AMT, erasing the benefit, as Doeren Mayhew warns.
Deducting both income and sales tax. You must pick one; claiming both overstates Schedule A and invites an IRS adjustment.
Itemizing when the standard deduction is higher. If your itemized total is below $15,750 (single) or $31,500 (joint) for 2025, itemizing costs you money.
Missing the PTET election deadline. Many states require the election early in the year, and a late election forfeits the workaround for the entire tax year.
Prepaying property tax that is not yet assessed. You cannot deduct an estimate; only an assessed bill is deductible in the year you pay it.
Ignoring the married-filing-separately penalty. MFS filers get only $20,000 (and $5,000 after 2030), and a $250,000 phase-out threshold.

Do’s and Don’ts

Do add up your SALT before deciding to itemize, because the deduction only helps if you beat the standard deduction.
Do manage your MAGI near $500,000, since pretax contributions can rescue thousands in lost deduction.
Do explore a PTET election if you own a pass-through, because it survives the 2030 reversion.
Do keep records of every property and income tax payment, since you must substantiate Schedule A if audited.
Do check your state’s conformity rules, because federal law does not control your state return.
Don’t assume the cap stays at $40,000, because the law already sets the 2030 drop.
Don’t claim both income and sales tax, because only one is allowed.
Don’t overlook the AMT, because it can neutralize a big SALT deduction.
Don’t prepay an unassessed tax, because the IRS disallows it.
Don’t wait until December to plan, because PTET elections often close early in the year.

Pros and Cons of the Current $40,000 Cap

Pro: Four times the old deduction, meaning thousands in annual savings for high-tax-state itemizers.
Pro: A five-year planning window (2025–2029) you can build strategies around.
Pro: PTET workarounds remain available for business owners, even past 2030.
Pro: May make itemizing worthwhile again for filers who switched to the standard deduction.
Pro: Small annual 1% increases through 2029 nudge the cap and threshold upward.
Con: It is temporary and reverts to $10,000 in 2030, a hard cliff.
Con: A steep phase-out punishes incomes between $500,000 and $600,000.
Con: It can trigger the AMT, quietly erasing the benefit.
Con: Married-filing-separately filers get only half the cap.
Con: W-2 employees with no pass-through have no workaround after 2030.

What to Do Next

Pull your most recent Schedule A and total your property tax plus state income (or sales) tax.
Compare that total to the 2025 standard deduction to confirm itemizing pays off.
Estimate your MAGI; if it is near or over $500,000, model pretax contributions to stay under the threshold.
If you own a pass-through business, contact your CPA now and confirm your state’s PTET election deadline.
Plan any large, already-assessed deductible payments for a tax year inside the 2025–2029 window, not after.
Calendar the 2030 reversion and revisit your itemizing strategy each fall through 2029.
If your situation involves AMT, a business entity, or income above $500,000, hire a CPA or tax attorney — this is where professional help, typically a few hundred to a few thousand dollars, pays for itself.

FAQs

When does the SALT cap revert to $10,000? Tax year 2030. The $40,000 cap applies for 2025 through 2029, then the limit drops back to $10,000 ($5,000 if married filing separately) on January 1, 2030, under current law.

What is the SALT cap for 2025? $40,000 for most filers ($20,000 if married filing separately), available only if you itemize on Schedule A. It rises about 1% per year through 2029.

Does the SALT cap increase each year? Yes. The $40,000 cap and the $500,000 phase-out threshold both rise 1% annually from 2026 through 2029, then the cap reverts to $10,000 for 2030.

At what income does the SALT deduction phase out? $500,000 MAGI for 2025 ($250,000 if married filing separately). The cap shrinks by 30% of income over that line and reaches the $10,000 floor at $600,000 MAGI.

Will the $10,000 SALT cap be permanent after 2030? No guarantee either way. Current law sets it at $10,000 with no scheduled increase after 2030, but Congress can change it with future legislation.

Can married couples filing separately get $40,000? No. Separate filers are capped at $20,000 for 2025–2029 and $5,000 after 2030, with a phase-out starting at $250,000 MAGI.

Does my state follow the federal SALT cap? It depends. The federal cap applies only to your federal return. State treatment varies, and many high-tax states offer a PTET election to work around it.

What taxes count toward the SALT deduction? State and local income or sales tax, plus property tax. You choose income or sales tax, not both, and you cannot deduct federal taxes, gas taxes, or special assessments.

Does the PTET workaround end in 2030? No. The pass-through entity tax election was preserved under the OBBBA and remains available to eligible business owners before and after the 2030 reversion.

Can the SALT deduction trigger the AMT? Yes. State and local taxes are not deductible for the alternative minimum tax, so a large SALT deduction can push high earners into AMT and cancel the benefit.

Should I itemize to claim the SALT deduction? Only if your itemized total beats the standard deduction — $15,750 single or $31,500 married filing jointly for 2025. Otherwise the standard deduction saves you more.

How much can a high-tax-state homeowner save now versus 2030? Up to about $10,500 a year in the 35% bracket on a full $40,000 deduction, all of which disappears when the cap returns to $10,000 in 2030.

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