California PTET Extended Through 2030: Missing the June 15 Prepayment No Longer Voids the Election

Key takeaways

• SB 132 extends California's elective PTET through tax years beginning before January 1, 2031 — five more election years (2026 through 2030), restoring multi-year planning certainty under newly added Rev. & Tax. Code § 17052.11 and new Part 10.4.1 (§§ 19910-19914).
• A short or missed June 15 prepayment no longer kills the election. For tax years beginning on or after January 1, 2026, the consequence is a credit haircut equal to 12.5% of the owner's pro rata share of the amount due but not paid, not forfeiture of the election.
• The required June 15 prepayment amount is unchanged: the greater of 50% of the prior year's elective tax or $1,000, with the balance due by the original return due date. The entity-level rate remains 9.3%.
• The economics still favor paying by June 15 in most cases. California's 13.3% top rate makes this the largest SALT-cap workaround most owners have; a 12.5% reduction on the unpaid slice is a real cost, not a rounding error.
• Confirm 2026 elections now and track the credit at the owner level, especially for mixed-residency groups and partners coordinating PTET across multiple states.

What SB 132 changed

For four years California's elective pass-through entity tax has done one job well: it moves a deductible state income tax from the individual return — where the $10,000 SALT cap strands it — to the entity return, where it survives in full as a federal deduction. At a 13.3% top marginal rate, that is the most valuable state-tax planning move available to most California business owners.

The mechanism carried one notoriously sharp edge. Under AB 150 (2021) and the conforming rules in Rev. & Tax. Code § 17052.10 and §§ 19900-19906, a qualified entity electing for a given year had to make a prepayment on or before June 15 of that year, equal to the greater of 50% of the prior year's elective tax or $1,000. Miss it, or pay a dollar short, and the entity was disqualified for the entire year. No cure existed. Practitioners managing uncertain income — a partnership unsure of positive qualified net income, an S corporation mid-restructuring — were forced to either prepay into a year that might not justify it or surrender the election outright.

SB 132 removes that cliff. For tax years beginning on or after January 1, 2026, an entity that fails to make the June 15 payment, or makes one below the required amount, keeps its election. What changes is the owner's credit: it is reduced by 12.5% of the qualified taxpayer's pro rata share of the amount due but not paid. The remaining elective tax is still paid with the timely filed return, and the owner still claims the corresponding credit — net of the reduction.

The number that matters: 12.5% of the shortfall, not 12.5% of the credit

The reduction is narrow by design. It applies only to the *unpaid portion* of the required June 15 installment, allocated to each owner pro rata, and only at a 12.5% rate. It is not a reduction of the full credit or the full elective tax. An owner whose entity made no June 15 payment bears 12.5% of that owner's share of the required installment as lost credit; an owner whose entity paid most of the installment bears 12.5% of a much smaller base.

The change converts a binary forfeiture into a priced option: pay by June 15 and keep the whole credit, or defer and accept a defined haircut on the deferred slice.

That reframing is the practical heart of SB 132. The June 15 date no longer governs whether the election exists. It governs how much of the credit an owner keeps.

What to do for 2026

First, confirm the election. SB 132 did not change the underlying election mechanics. The election is still made on a timely filed original return, requires the consent of each electing owner, and is irrevocable for the year. Every qualifying partnership and S corporation intending to elect for 2026 should have that decision documented and consents in hand before June 15.

Second, make the June 15, 2026 prepayment decision deliberately. The old rule made June 15 a hard stop; the new rule makes it a cost-benefit question. In the ordinary case — an entity confident it will have qualified net income — paying the full required installment by June 15 preserves the entire credit and remains the right answer. The new flexibility is most useful where income is genuinely uncertain on June 15: an entity can make a conservative payment or none, preserve the election, and accept the 12.5% reduction on the unpaid share if the election is ultimately worth making. The downside is now bounded and quantifiable rather than total.

Third, use the 2030 horizon. With the elective tax running through the 2030 tax year, owners can model the benefit across a multi-year window rather than re-litigating the election each spring. That horizon should be weighed against the federal SALT-cap rules in effect for the corresponding years; the value of the workaround tracks whatever the federal cap looks like in each modeled year.

Fourth, track the credit at the owner level. Any reduction is computed on each owner's pro rata share, making it an owner-level figure, not an entity-level one. For mixed-residency groups — some owners California residents, some nonresidents with California-source income — each owner's credit and any reduction must be tracked separately. Partners with income in multiple states should coordinate the California election with PTET elections in those states, since other-state regimes carry their own deadlines and prepayment rules that do not move in step with California's.

Frequently asked questions

If my entity misses the June 15, 2026 prepayment entirely, can it still elect?

Yes. For tax years beginning on or after January 1, 2026, a missed or underpaid June 15 installment no longer disqualifies the entity. The election survives. Each owner's credit is reduced by 12.5% of that owner's pro rata share of the amount due but not paid; the rest of the elective tax is paid with the timely filed return and credited as usual.

Should we still pay by June 15?

In most cases, yes. The reduction is a real cost — 12.5% of the unpaid required installment, lost as credit and not recoverable — and the underlying benefit is large given California's 13.3% top rate. Paying the full required installment by June 15 preserves the entire credit. The new rule is a safety valve for years of genuine income uncertainty, not a reason to defer routinely.

How much is the June 15 prepayment, and did SB 132 change it?

The required prepayment amount is unchanged: the greater of 50% of the prior year's elective tax or $1,000, due on or before June 15, with the balance due by the original return due date. The entity-level rate also remains 9.3%. SB 132 changed only the *consequence* of falling short, not the amount or the rate.

How long does the extended election last?

Through the 2030 tax year — that is, tax years beginning on or after January 1, 2026 and before January 1, 2031. After the 2030 year, the elective tax sunsets unless the Legislature acts again.

Bottom line

For every qualifying California partnership and S corporation: confirm the 2026 PTET election and consents are in place now, and put the June 15, 2026 prepayment decision on the calendar as a priced choice rather than a deadline that can void the year. Default to paying the full required installment — the greater of 50% of the prior year's elective tax or $1,000 — by June 15 to keep the entire credit; reserve the new flexibility for years when income is genuinely uncertain, knowing the cost of deferral is now capped at 12.5% of the unpaid pro rata share. With the regime extended through 2030, model the benefit across the full window and coordinate it owner by owner with any out-of-state PTET elections.