California Pass-Through Entity Tax (PTET)

Why PTET matters in this state

California's top marginal individual rate of 13.3% sits among the highest in the country, and the IRC §164(b)(6) SALT cap has bound the state's pass-through owner class harder than almost any other since 2018. The PTET workaround under R&TC §17052.10 (credit) and §19900 (entity-level tax) lets qualifying S-corps and partnerships push California state tax onto the entity's federal return as an ordinary business deduction sanctioned by IRS Notice 2020-75, restoring deductibility that would otherwise hit the $10,000 cap. Typical beneficiaries are high-earning service-firm partners, S-corp owners with W-2 plus K-1 stacks, and multi-state operators with material California-source income. The 2025 extension (S.B. 132) carried the regime forward to taxable years beginning before January 1, 2031, removing the prior 2026 sunset and stabilizing planning for the next four filing seasons.

Election mechanics

The election is made on a timely-filed original return (including extensions) by attaching Form FTB 3804 to the entity return. Critically, California front-loads a prepayment gate: the entity must remit, by June 15 of the taxable year, the greater of 50% of prior-year PTE tax or $1,000 — paid with Form FTB 3893. Miss or short that June 15 prepayment and the election for that year is forfeited entirely. The rate is a flat 9.3% on qualified net income (R&TC §19900), applied at the entity level. Eligible electors are S-corps, partnerships, and LLCs taxed as either; publicly traded partnerships, disregarded single-member LLCs, and entities with a partnership as a partner are excluded under FTB guidance. The election is irrevocable for the elected year.

Owner credit walkthrough

California's owner-side credit is non-refundable. Each qualified taxpayer claims a credit equal to their pro rata share of the entity-level tax paid, against California personal income tax liability on the personal return. Unused credit carries forward up to five years under R&TC §17052.10. Multi-owner allocation is by pro rata share; partners or shareholders who themselves are partnerships, disregarded LLCs, or non-individual non-trust entities are not 'qualified taxpayers' and cannot claim. Because the credit is non-refundable, owners with low California liability relative to their distributive share may bank credit they cannot immediately use — consult a preparer on the carryforward mechanics if your California liability is shaped by other credits or NOL absorption.

2026 changes

S.B. 132 (signed June 2025) extended the PTE elective tax to taxable years beginning on or after January 1, 2026 and before January 1, 2031. Mechanics, rate, and prepayment gate were not changed by the extension. Federally, OBBBA (July 2025) raised the SALT cap to approximately $40,000 joint with a $500,000 MAGI phaseout to a $10,000 floor for 2025–2029, reverting to $10,000 in 2030 — the workaround economics still favor California pass-through owners above the phaseout. Re-verify both pieces against FTB and Treasury primary sources before electing.

Composite-return interaction

California PTE election stacks with separate group nonresident (composite) filing under R&TC §18535 — making the election does not preclude filing a group return for nonresident owners. The interaction matters most for partnerships with a mix of California-resident and nonresident owners: residents take the PTE credit on Form 540, while nonresidents may either file Form 540NR personally and take the PTE credit there, or remain on the group nonresident return. Composite filers should confirm with the preparer that PTE-paid amounts are not double-counted as withholding under R&TC §18662.

§199A QBI interaction

Per IRS Notice 2020-75, the entity-level state tax under §19900 reduces federal flow-through ordinary income and therefore reduces the §199A QBI base proportionally. At a 9.3% PTET rate, roughly 9.3% of QBI is consumed before the 20% deduction is applied — meaning the §199A offset against the SALT-arbitrage benefit is non-trivial. For specified-service-trade-or-business owners already inside the §199A phaseout, the offset analysis is preparer-judgment territory.