The pass-through entity tax election used to be a no-brainer for S-corp and partnership owners in high-tax states. Pay your state income tax at the entity level, dodge the federal SALT cap on your personal return, save five figures in federal taxes. Clean arbitrage.

Then Congress quadrupled the SALT deduction cap.

The One Big Beautiful Bill Act, signed in July 2025, raised the state and local tax deduction limit from $10,000 to $40,000 for married couples filing jointly (and from $10,000 to $20,000 for single filers) starting with the 2025 tax year. That change cuts the federal benefit of PTET elections roughly in half for many pass-through owners, and it eliminates the benefit entirely for some.

So if you’ve been making PTET elections for the past few years, or if you were planning to start, the question is: does the math still work?

Why This Matters Right Now

PTET regimes exist because of the original $10,000 SALT cap that came with the 2017 Tax Cuts and Jobs Act. Connecticut launched the first workaround in 2018. The idea was simple: let S-corps and partnerships pay state income tax at the entity level, where it counts as a deductible business expense for federal purposes, instead of forcing owners to take the hit on their personal returns where the $10,000 cap applies.

By 2022, 36 states had some version of PTET on the books. The IRS blessed the strategy in Notice 2020-75, confirming that entity-level state tax payments qualify as ordinary business deductions under Section 164. No challenge, no pushback, despite the fact that this was clearly designed to sidestep a federal cap.

The new $40,000 cap doesn’t kill PTET, but it does shrink the federal arbitrage significantly. For someone with $45,000 in state income tax, the old cap left $35,000 of excess tax that could only be deducted via PTET. The new cap leaves just $5,000 of excess. That’s still a deduction, but the federal savings dropped from around $13,000 to under $2,000 at the top marginal rate.

If you have a PTET election deadline coming up (many states require quarterly estimates or an annual election by mid-March or April 15), you need to know whether the benefit still justifies the hassle.

The Old Math vs. The New Math

Here’s what the federal tax benefit looked like under the $10,000 cap compared to the $40,000 cap, using a straightforward scenario.

Hypothetical Example:

You’re an S-corp owner. Your share of state income tax is $40,000. You have no property tax for simplicity. You’re in the 37% federal marginal bracket.

Under the old $10,000 SALT cap (tax year 2024), you could only deduct $10,000 of state tax on your personal return. The remaining $30,000 was nondeductible unless you used PTET. If the entity paid that $40,000 as PTET, the full amount became a federal business deduction. That saved you $14,800 in federal taxes (37% of $40,000), minus the $3,700 you would have saved from the personal $10,000 deduction, for a net federal benefit of $11,100.

Under the new $40,000 SALT cap (tax year 2025), you can deduct the full $40,000 on your personal return without PTET. The federal benefit of the PTET election in this scenario is now zero, because you’re not exceeding the cap.

The savings didn’t disappear for everyone. They just got a lot smaller for people whose state tax falls between $10,000 and $40,000. If your total state and local taxes (income plus property) exceed $40,000, PTET still creates federal savings on the excess. But if you’re under that threshold, the election no longer moves the needle federally.

There’s one big exception: the phaseout. The new $40,000 cap phases down for taxpayers with modified adjusted gross income over $500,000 (married filing jointly or single; $250,000 for married filing separately). The cap reduces by 30% of the amount over $500,000, bottoming out at $10,000. That means if your MAGI is around $600,000 or higher, you’re effectively back to the old $10,000 cap, and PTET regains most of its original value.

When PTET Still Wins

PTET may still deliver meaningful federal tax savings in several common scenarios:

  • If your combined state income tax and property tax exceed $50,000 to $60,000, you are still well above the $40,000 SALT cap, and PTET allows the excess to be deducted at the entity level. At a 37% federal bracket, every $10,000 of excess SALT could reduce federal taxes by $3,700. For example, if total SALT is $98,000, you deduct $40,000 personally and the remaining $58,000 through PTET, which could generate about $21,460 in federal tax savings.

  • If your MAGI exceeds $500,000 and you are subject to the SALT cap phaseout, your effective cap may drop closer to $10,000, making PTET significantly more valuable. For high earners in states such as California, New York, or New Jersey, the increased cap may not materially benefit you, and PTET can restore much of the lost deduction.

  • If you are part of a multi-owner entity, the compliance cost of making the PTET election is typically shared, while each owner receives their own federal tax benefit. When the per-owner savings exceed their share of the administrative cost, the election may still produce a net benefit.

  • If your state provides a dollar-for-dollar credit for PTET paid rather than only a state deduction, the benefit is generally cleaner and easier to capture. Most PTET states use credits, including New York and California.

  • If you have significant property taxes in addition to state income tax, PTET can help with SALT cap stacking by shifting the income tax portion to the entity level. That may preserve more of your personal $40,000 SALT deduction for property taxes and potentially increase overall federal tax savings.

When PTET Is Now Marginal

The gray zone is total SALT between $40,000 and $60,000. In that range, the federal benefit of PTET is real but small. You’re saving federal tax on maybe $5,000 to $20,000 of excess deductions. At the 37% rate, that’s $1,850 to $7,400.

That’s not nothing, but it comes with tradeoffs.

Most states make PTET elections irrevocable for the tax year. You can’t opt out mid-year if the law changes, your income drops, or you realize the math doesn’t work. You’re locked in.

PTET also typically requires quarterly estimated payments at the entity level. That means tracking separate payment schedules, filing additional forms, and coordinating with your state’s revenue department. If you’re a solo S-corp owner, that’s all on you. If you’re in a partnership, someone has to manage it, and that someone is usually the managing partner or the accountant.

There’s also compliance cost. Depending on your state and your entity structure, adding PTET to your annual tax workflow can cost anywhere from a few hundred to a few thousand dollars in additional prep fees. If your federal savings is $2,000 and your incremental compliance cost is $1,500, you’re netting $500. That might be worth it. It might not.

And there’s risk. States change their PTET rules. Some states have sunset provisions. Oregon’s PTET was extended through 2025 and is under review for extension to 2027, but it’s not permanent. If your state pulls the plug mid-strategy, you’re stuck adjusting.

Finally, there’s the federal estimated tax penalty risk. If you’ve been making PTET payments for the past few years and you switch back to personal SALT deductions, your federal withholding and estimates might fall short of the safe harbor (90% of current year tax or 110% of prior year tax, whichever applies). That can trigger an underpayment penalty, which runs around 8% annualized. On a $50,000 shortfall, that’s a $2,000 penalty you didn’t plan for.

In this zone, the honest answer is: it depends. Run your own numbers. Compare the federal savings to the administrative cost and hassle. If the benefit is under $2,000 and the election is irrevocable, you might skip it. If the benefit is $5,000 and you’re already paying an accountant to handle entity-level compliance, you might stay in.

What to Check in Your State

PTET rules are state-specific, and several states have made changes in response to the federal cap increase.

Here’s what to verify before you make or renew an election.

First, check if your state’s PTET law has a sunset date. Some states enacted PTET as temporary legislation tied to the original SALT cap. If the federal cap goes away entirely (which could happen if the TCJA provisions sunset after 2025 or if Congress repeals the cap), some state PTET regimes might expire. Oregon’s law, for example, is currently set to end after 2025 unless extended.

Second, confirm the election deadline. Some states require PTET elections by March 15 (the partnership/S-corp return due date). Others allow elections as late as the extended return deadline or require quarterly estimated payments with elections tied to those deadlines. Missing the deadline usually means you’re out for the year.

Third, understand whether your state gives you a credit or a deduction for PTET paid. A credit offsets your state tax liability dollar-for-dollar. A deduction reduces your state taxable income, which is worth less. Most PTET states use credits, but not all. If your state uses a deduction, the state-level benefit is smaller, and that affects the overall math.

Fourth, check if your state made any recent changes to PTET in response to the federal cap increase. New York extended its PTET program. California is reviewing its rules. Oregon introduced a bill (SB 211) that would allow overpayment carryforwards for PTET credits. These details matter, and they’re not always obvious from the statute.

Your state’s department of revenue website should have updated guidance. If not, your accountant should know. If you’re making this decision without professional help, you’re probably missing something.

Avoid These Mistakes

Double-Dipping The Same State Tax Payment

Claiming both the PTET deduction at the entity level and the personal SALT deduction on the same state tax payment is the most common mistake. The IRS can disallow the double deduction and assess additional tax. The correction could cost $3,000 to $15,000 depending on the amount involved, plus penalties and interest.

Changing Strategies Without Adjusting Federal Estimates

Switching from PTET to the personal SALT deduction mid-strategy without adjusting federal estimated tax payments can create an underpayment issue. If PTET payments stop and federal withholding is not increased, you may miss safe harbor thresholds. That can trigger an underpayment penalty of $1,000 to $3,000 on a typical shortfall. The penalty is generally avoidable if withholding or estimates are increased in time, but many taxpayers do not realize the gap until filing.

Overlooking The MAGI Phaseout

Ignoring the MAGI phaseout when calculating the SALT benefit can distort the numbers. If modified adjusted gross income exceeds $500,000, the effective SALT cap may fall below $40,000. Assuming a full $40,000 deduction when the actual cap is $31,000 at $530,000 of MAGI can eliminate the expected benefit. Run the phaseout calculation before making the election.

Treating The PTET Credit As Federal Taxable Income

Assuming the state PTET credit is taxable for federal purposes leads to overpayment. State tax credits tied to PTET paid are not included in federal income. If the credit is incorrectly reported as taxable, federal tax may be overstated by 37% of the credit amount. On a $20,000 credit, that equals a $7,400 error.

Electing PTET Without Confirming Entity Eligibility

Electing PTET without confirming that the entity qualifies can invalidate the strategy. Most states allow S corporations and multi-member LLCs taxed as partnerships. Some exclude single-member LLCs or sole proprietorships. If the entity does not qualify, the payment may not be treated as PTET, and both the federal deduction and state credit could be lost.

Forgetting The Election Is Irrevocable

PTET elections are generally irrevocable for the tax year once made. If income drops, law changes occur, or projections prove inaccurate, the election usually cannot be reversed. Evaluate the numbers carefully before committing for the year.

Worth Looking Into

It’s worth running the actual numbers for your situation using your 2025 projected state tax, property tax, and MAGI. The federal benefit of PTET depends on how far over the $40,000 cap you are and whether the phaseout applies to you. A spreadsheet or a conversation with your accountant will tell you more than a general article can.

If you’re close to the $500,000 MAGI threshold, it’s worth modeling what happens if your income ticks over. The phaseout can change the PTET math significantly, and small income shifts (Roth conversions, timing of bonuses, retirement contributions) can push you in or out of the zone where PTET makes sense.

If your state has a PTET sunset date or pending legislation, it’s worth checking the status before you commit to the election. State revenue departments usually post updates, and your state CPA society or tax professional association will have guidance if the rules are in flux.

If you’ve been making PTET elections for the past few years and you’re thinking about stopping, it’s worth reviewing your federal estimated tax situation to make sure you don’t trigger an underpayment penalty. Adjusting withholding or making an additional estimate payment in Q4 can save you the penalty if you catch it in time.

Finally, if you’re in the $40,000 to $60,000 total SALT range and the federal benefit is small, it’s worth asking your accountant what the incremental cost of PTET compliance is. If the answer is more than half the federal savings, the election probably isn’t worth it unless you expect your income or state tax to increase in future years.

Disclaimer: This is educational content from Silly Money, not tax, legal, or investment advice. Taxes are complicated and your situation is unique. Talk to a qualified professional before making decisions based on anything you read here.