What is PTET, and should pass-through business owners plan for it before year-end?

The ptet pass-through entity tax is a state-level election that allows an S corporation or partnership to pay state income tax at the entity level rather than passing that liability through to owners personally. That entity-level payment is fully deductible for federal purposes under IRS Notice 2020-75, with no dollar cap, which is what makes it so valuable for high-income business owners. Yes, pass-through owners should be planning for it right now, because the federal deduction is recognized in the year the entity actually pays, and December 31 is the hard line for most states.

How does PTET actually work at the entity level?

When a partnership or S corporation elects PTET, the entity pays state income tax directly and deducts that payment on its federal return under IRC §164(a). That deduction is not subject to any dollar limitation. Owners then receive a state tax credit through their K-1, so the benefit flows to them regardless of whether they itemize on their personal return.

More than three dozen states have adopted some version of this election. Only entities taxed as partnerships or S corporations can use it. A sole proprietorship or a single-member LLC treated as a disregarded entity cannot elect PTET, because there is no separate taxpayer to make the entity-level payment.

Why does this matter more now that the SALT cap has changed?

The One Big Beautiful Bill Act raised the individual SALT cap to $40,000 and indexed it by 1% per year, putting the 2026 cap at $40,400. That sounds like an improvement, but the cap phases down by 30 cents for every dollar of modified AGI above $505,000 and bottoms out at $10,000. Most high-income pass-through owners land right at that floor.

The entity-level deduction sidesteps that individual cap entirely. Consider a California S-corp owner with $500,000 of pass-through income. At the individual level, usable SALT deduction may be limited to roughly $10,000 after the phaseout. At the entity level, the same owner can deduct roughly $46,500 using California's 9.3% PTET rate. At a 37% federal marginal rate, a $74,400 entity-level deduction may reduce the household's federal tax by approximately $27,500.

An owner who does not itemize gets zero SALT deduction personally, but the entity deduction still flows through the K-1. That makes PTET one of the few strategies that can benefit non-itemizers in a meaningful way.

For a deeper look at how this fits into a broader S-corp tax plan, see What Are the Real S Corp Benefits for High Earners in 2026?

What is the trade-off every owner must model before electing?

PTET reduces qualified business income at the entity level, which shrinks the Section 199A deduction. If a PTET payment reduces K-1 income by $25,000, the QBI deduction drops by roughly $5,000. On a $500,000 QBI base, a $50,000 PTET payment cuts the 199A deduction by $10,000, which costs roughly $3,700 at the 37% bracket.

That is not a reason to avoid PTET. It is a reason to model it carefully before electing. In most high-income situations, the federal tax saved through the entity-level deduction still exceeds the cost of the reduced 199A deduction, but the math depends on the specific numbers.

PTET is irrevocable in most states once the election is made for the year. Electing without running the numbers first is one of the more costly mistakes our team sees in year-end planning. PTET can also interact with state-level alternative minimum taxes, charitable deduction limitations, and minimum tax computations, so the full state picture needs to be reviewed alongside the federal benefit.

You can see how PTET fits into the broader year-end picture in What is year-end tax planning, and why does it matter for high earners?

What deadlines do calendar-year entities need to hit before December 31?

This is where timing becomes critical. The federal deduction is recognized in the year the entity actually pays, not the year the tax accrues. Even an accrual-method entity is effectively on a cash basis for this one deduction. A check mailed on January 2, 2027 deducts in 2027, not 2026, even if the underlying state tax liability is entirely for the current year.

Key state deadlines for calendar-year entities include:

• California: A minimum prepayment of $1,000 or 50% of the prior year's PTE tax, whichever is greater, was due by June 15. A balance-due payment before December 31 may still capture additional deduction for the current year. California's pass-through entity elective tax rules explain the mechanics in detail.
• Michigan: The election and payment must be completed by December 31.
• New York: The election was due through the state portal by March 15, 2026, with estimated PTET payments made inside the year to support the deduction on the current-year federal return.

For most states, a December estimate or payment before December 31 is the mechanism that pulls the deduction into the current year. A January payment is deducted the following year, turning the last quarterly state estimate into a real decision with real dollar consequences.

For more on how estimated payment timing affects S-corp owners, see What Is the S Corp Year End Deadline and Why Does It Matter?

How large can the savings actually be for high-income owners?

The benefit scales with both income and state tax rate. Business owners in high-tax states with $200,000 or more of pass-through income may save $5,000 to $20,000 or more per year in federal taxes, depending on the state rate and their marginal bracket. A New York S corporation with $1.2 million of income may save owners approximately $48,000 in federal tax by routing $130,000 of state tax through the entity.

This guide on how PTET bypasses the SALT cap walks through the mechanics for both S corps and partnerships with additional examples.

Who should be reviewing this before year-end?

Any owner of an S corporation or partnership in a state that has adopted PTET with meaningful pass-through income should be reviewing this before December 31. That includes owners who do not itemize, owners who have never elected before, and owners who elected in a prior year but have not confirmed their current-year payment timing.

The planning window through 2026 and into the following years is stable. For multi-year cash flow decisions, that window provides enough certainty to build a consistent strategy. The highest-value conversations happen before the payment deadline, not after. If the entity has not yet modeled the net federal benefit against the QBI reduction, that analysis needs to happen now.

Our team works with S-corp owners and partnership clients to run that modeling before year-end so the election and payment are made with full visibility into the numbers.