Over 35 states now offer a pass-through entity tax (PTET) election. If you sell into more than a handful of states and your LLC or S-Corp is profitable, you are almost certainly leaving real federal deductions on the table.
What PTET is, in one paragraph
A Pass-Through Entity Tax (PTET) is an elective state tax paid by the business itself rather than by the individual owners. The state collects tax at the entity level, the business gets to deduct the payment as an ordinary business expense on its federal return, and the owners get a corresponding state tax credit on their personal returns. Because the deduction moves from Schedule A (where it is capped at $40,000 for 2026 under the OBBBA-enhanced SALT cap) to Schedule E / the entity return (where it is uncapped), the strategy converts a capped personal itemized deduction into a fully deductible federal business expense.
Why this matters for ecommerce specifically
Traditional service businesses usually operate in one or two states, so PTET is a relatively simple math problem. Ecommerce brands are different. The typical 7- or 8-figure DTC or Amazon brand has:
- Physical nexus in 3–10 states (3PL warehouses, FBA fulfillment centers, remote employees)
- Economic nexus in 15–40+ states (based on sales thresholds)
- Pass-through federal taxation (LLC taxed as partnership or S-Corp)
- Owners who are residents in a high-tax state (CA, NY, NJ, MN, MA, IL, OR)
When the business is profitable, state income tax exposure can easily run $80k–$300k across multiple jurisdictions. Without a PTET election, every dollar of that tax either shows up as a personal itemized deduction (capped at $40k combined with property taxes and state income tax on wages) or does not produce a federal benefit at all. With PTET, the full amount becomes a federal deduction at the entity level.
The 2026 SALT cap picture
The OBBBA increased the SALT cap from $10,000 to $40,000 (indexed — it is $40,400 for 2026), which helped some taxpayers on the margin. But the cap phases down for higher-income households and still leaves most profitable ecommerce owners well short of deducting their full state tax bill. For a founder in California with $500k of S-Corp income, the personal California tax is roughly $45k. Without PTET, most of that sits above the cap. With PTET, $45k becomes a fully deductible business expense — worth roughly $16k–$17k in federal tax savings at a 37% rate.
Multiply that across multiple owners, multiple states, and multiple years, and PTET is usually one of the highest-ROI planning moves available to an ecommerce operator.
The three questions that determine whether PTET makes sense
1. Is the entity a qualifying pass-through?
PTET is available to partnerships (including LLCs taxed as partnerships) and S-Corporations in most states. Single-member LLCs that are disregarded for federal purposes do not qualify — a disregarded SMLLC is not a separate pass-through entity, it is a sole proprietorship. If your business is structured as an SMLLC, converting to an S-Corp election (or bringing in a partner) is often the first step.
2. Do all the owners benefit?
PTET is an all-or-nothing election in most states — all owners go in together or not at all. If one of the owners is a nonresident in a state that doesn’t honor the PTET credit, or a partner with unusual state tax characteristics (trust, C-Corp, tax-exempt), the election may create an owner-level problem for that partner. Run the math owner by owner before electing.
3. Does your state allow it, and on what timeline?
Thirty-five-plus states plus New York City now offer PTET. Election mechanics and deadlines vary wildly:
- California — 2026 election due by June 15 with a prepayment; missed prepayments in 2026-2030 no longer forfeit the election but reduce each owner’s credit by 12.5% of the unpaid amount.
- New York — election must be made via Business Online Services by March 15 annually, even if you previously opted in.
- Michigan — election can be made up to the last day of the 9th month after year-end (September 30, 2026 for calendar-year 2025).
- New Jersey — election must be made by the original due date of the entity return.
- Most other states — varying prepayment requirements, varying credit mechanics, varying rules on composite returns.
If you operate in multiple states, you effectively need to run 5–15 simultaneous PTET analyses. This is where most ecommerce CPAs drop the ball — they run it for the home state and forget the others.
The math of a typical ecommerce PTET decision
Take a single-owner S-Corp ecommerce brand generating $800k of federal ordinary income, with the owner a California resident. Without PTET, California personal tax on the K-1 income is roughly $75k. The owner’s SALT cap is $40,400 in 2026, most of which is already consumed by California income tax on W-2 wages and property tax. Net federal benefit from the $75k of California tax: close to $0.
With a California PTET election, the S-Corp pays $75k in PTET at the entity level. That becomes a deduction on the federal 1120-S, which flows through to reduce the owner’s K-1 income by $75k. Federal tax savings: approximately $27,750 at a 37% rate. The owner gets a $75k California tax credit on the personal return, so California is revenue-neutral to them. Net: a $27,750 annual federal tax savings the owner was previously missing.
Now extend that across a multi-state ecommerce brand with PTET-equivalent taxes in New York, Illinois, Massachusetts, and Oregon, and you are talking about $50k–$120k of federal savings per year for a mid-market brand.
Where PTET goes wrong
Nonresident owners
If you have an owner who lives in a state that does not offer a credit for PTET paid to another state (a small number of states treat it this way), that owner can end up with double taxation. Check resident-state credit rules before electing.
Composite returns
Some states require or allow a composite return for nonresident owners. Electing PTET typically eliminates the need for a composite — but not always, and not in every state. Failing to file the right form is a common audit trigger.
Prepayment cash flow
Most states with PTET require estimated payments during the year, often front-loaded. A business that elects PTET without planning for the cash impact can find itself short on working capital at the quarter. Model this alongside your inventory and tariff cash needs.
QBI interaction
PTET paid by the entity reduces the federal pass-through income flowing to the owner, which also reduces the Qualified Business Income deduction. For owners who were already phased out of QBI, this is irrelevant. For owners still in the QBI zone, the net benefit is smaller than the headline tax-rate math suggests. Always model QBI alongside PTET.
Action items for Q2 2026
- List every state your business files an income tax return in (this is not the same list as your sales tax nexus states — but it often overlaps).
- For each state, confirm whether a PTET election is available and the 2026 election deadline.
- Identify whether any owners would be disadvantaged — nonresident partners in states with unusual credit rules, trust owners, C-Corp partners.
- Build a year-over-year projection of the federal benefit, net of QBI interaction, for each state.
- If your entity is a single-member LLC, evaluate whether an S-Corp election unlocks enough PTET benefit to justify the structural change.
- Calendar the estimated PTET prepayment dates alongside your federal estimated tax and sales tax remittance dates.
The bigger picture
PTET is the rare piece of tax planning that is widely available, meaningfully large, and still underutilized three years after the IRS blessed it. The ecommerce brands that execute on it consistently across every state they touch are capturing a federal deduction that their competitors are literally leaving on the table.
If you want help inventorying your state filings, running the PTET math state by state, or coordinating the election deadlines against your 2026 tax planning, this is a workflow our team runs for multi-state ecommerce brands every spring. The window on most 2026 elections closes between March and June — there is not a lot of runway left.
