A state-by-state read on the pass-through entity tax, who qualifies, what it actually saves, and the deadline traps that turn a clean election into a missed year.
If you own a pass-through entity (S-corp, partnership, or multi-member LLC) in any of 36+ states with a pass-through entity tax (PTET) regime, you can elect to have the entity pay state income tax at the entity level. The entity-level payment is a fully deductible federal expense (sanctioned by IRS Notice 2020-75), which sidesteps the $10,000 SALT cap that limits the federal deduction on your personal return. Your home state then gives you a credit (or refund) for the entity-level tax, so you do not pay twice at the state level. The typical recurring savings for a profitable pass-through owner runs $2,000 to $50,000 a year. The catch is that every state runs its own election form, its own deadline, and its own quarterly-payment regime. Most pass-through owners outside New York and California have never had the conversation; many who have had it in California and New York make the election but miss a quarterly payment and lose the year.
The Tax Cuts and Jobs Act capped the federal itemized deduction for state and local taxes at $10,000 starting in 2018. For pass-through owners in high-tax states, that cap turned a long-standing federal deduction into a hard ceiling. A New York S-corp owner with $400,000 of pass-through income paid roughly $40,000 in New York state tax personally, but could only deduct $10,000 of it federally. The other $30,000 was lost as a federal deduction.
State legislatures noticed. Connecticut moved first in 2018. The IRS blessed the workaround in Notice 2020-75 (November 2020), confirming that a state income tax imposed on and paid by a partnership or S-corp is a federally deductible business expense, not a non-deductible personal SALT obligation. Once the IRS confirmed the mechanism would work, states moved quickly. By 2024 more than 36 states had stood up some form of PTET.
The structure is consistent across states even when the details differ. The entity makes a state-level election. The entity pays the state income tax at the entity level (usually at the highest marginal individual rate). The entity deducts the payment as a federal business expense on Form 1065 or 1120-S, which reduces the income that flows out on the K-1. The owner then claims a state credit, refund, or income exclusion that offsets the state-level liability that would otherwise come through on the personal return.
Net effect: the same state income tax bill, paid by the entity instead of the individual, becomes fully federally deductible. The $10,000 SALT cap on the personal return is no longer the binding constraint.
Three conditions need to line up:
The typical fit profile: a profitable pass-through (income above roughly $100,000) in a state with a top individual rate above 5%, where the owner already itemizes and is hitting the $10,000 SALT cap. New York, California, New Jersey, Massachusetts, Connecticut, Minnesota, Illinois, Maryland, Oregon, Virginia, and Georgia are the highest-leverage states for the election.
The arithmetic is the owner's marginal federal rate, applied to the state income tax that the entity now pays on the owner's behalf, minus the $10,000 SALT cap relief that would have come through on the personal return anyway.
A worked example. A married New York S-corp owner with $400,000 of pass-through income, no other state-tax liability. New York state tax at the entity-level PTET rate (about 10.9% at the top bracket) on $400,000 is roughly $43,600. Without PTET, the owner pays that $43,600 personally and deducts $10,000 federally. With PTET, the entity pays the $43,600 and deducts it fully on Form 1120-S. The owner's federal AGI drops by $33,600 (the $43,600 entity-level payment, less the $10,000 they would have already deducted personally). At a 37% federal marginal rate, that is about $12,400 of recurring federal tax savings per year.
The catalog Signal uses to flag these on inbound diagnostics carries a typical range of $2,000 to $50,000 per year, recurring. The low end is a smaller profitable pass-through in a moderate-tax state; the high end is a multi-partner professional services firm in California or New York pushing several million of partnership income.
Pull your most recent Form 1065 or 1120-S. Look in order:
A fast self-diagnostic: ask your CPA, "Did we make a PTET election this year? Which state? When was the deadline? Were the quarterly payments made on time?" If they cannot answer those four questions cleanly, there is a meaningful chance one of them slipped.
Each state runs its own form, deadline, and payment regime. The differences below are the highlights, not the full ruleset. Always verify on the state DOR's current-year instructions before relying on any of it.
If your entity files in multiple states, the election analysis runs state-by-state. Some owners benefit from electing in three states and not in a fourth, depending on income apportionment, owner residency, and the credit mechanics on the personal return. This is one of the few items in tax planning where the right answer can genuinely differ between two side-by-side pass-throughs.
The PTET has only existed federally since 2020. State regimes have stood up over a five-year window. Each state runs its own playbook. The result is that PTET sits squarely in the territory where a generalist preparer who runs 300 returns a year cannot keep current on every state's rule change. The misses fall in three buckets:
The "second opinion" frame is well-suited to the PTET specifically because the savings are concrete, the math is verifiable in 15 minutes, and the gap is binary: either you elected or you didn't.
If you own a pass-through entity in a PTET state and you are not sure whether the election was made cleanly, send us your last two returns and your home state. We will tell you, in 20 minutes, whether the election landed, whether the quarterly payments were on time, and roughly what it would save per year.
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