California’s Pass-Through Entity Tax in 2026: What San Diego Business Owners Need to Know

If you own an S corporation, a partnership, or an LLC in San Diego, the California pass-through entity tax is one of the few remaining ways to claw back a federal deduction you likely lost years ago. It was set to expire after 2025 — but it didn’t. California just extended the program through 2030, and the rules for 2026 changed in a way that works in your favor. Here’s what that means for your business and your personal return.

What the pass-through entity tax actually does

When you own a pass-through business, the profits flow through to your personal return and you pay California income tax on them there. The problem is the federal cap on state and local tax (SALT) deductions. For years, that cap limited how much of your state tax bill you could deduct on your federal return — which quietly raised the real cost of doing business in a high-tax state like California.

The pass-through entity (PTE) elective tax is California’s workaround. Instead of paying California tax on the business income through your personal return, your business elects to pay a 9.3% tax at the entity level. Because the business pays it, that state tax becomes a business deduction on the federal return — not a personal itemized deduction subject to the SALT cap. You then get a credit on your California personal return for your share of what the entity paid, so you aren’t taxed twice. For many San Diego owners, the net result is a lower federal bill for the same California income.

The federal SALT cap was raised under the 2025 federal tax law, and it phases down at higher income levels, so the value of this election is not identical for everyone. That’s exactly the kind of math worth running before you commit — it’s the sort of planning our business tax and accounting team does with owners every year. For the wider picture on California rates and rules, see our California tax guide.

The big update: it’s extended through 2030

Under Senate Bill 132, signed in 2025, the PTE elective tax is available for taxable years beginning on or after January 1, 2021, and before January 1, 2031. In plain terms, the election is now on the table every year through the 2030 tax year. If you had paused your planning because the program looked like it was sunsetting after 2025, it’s worth putting back on the table for 2026 and beyond.

The election itself hasn’t gotten more complicated. Each year, a qualifying business makes the election on a timely filed original return by filing Form FTB 3804 with the entity’s return. You cannot make it on an amended return, and once made, the election is irrevocable for that year and binds every owner — so it’s a decision to make deliberately, not one to reverse later.

The 2026 change that helps if you miss a payment

Here’s the practical shift for the 2026 through 2030 tax years. To elect, a business is supposed to make a first payment by June 15 during the tax year — the greater of $1,000 or 50% of the prior year’s PTE elective tax. Under the old rules, missing that June 15 payment disqualified you from making the election at all. Miss the date, lose the option.

Starting with the 2026 tax year, that’s no longer the case. If the June 15 payment is missed or comes up short, the business can still make a valid election. The trade-off is that each owner must reduce their PTE elective tax credit by 12.5% of their share of the amount that went unpaid on June 15. You don’t lose the election — you just lose a slice of the credit.

This matters right now. The June 15, 2026 payment deadline has already passed. If your business intended to elect for 2026 and didn’t make that first payment, you haven’t lost the opportunity the way you would have in prior years — but the 12.5% credit reduction is a real cost, so it’s worth reviewing your position before you file.

Who qualifies — and who doesn’t

The election is open to entities taxed as a partnership or an S corporation. Publicly traded partnerships don’t qualify, and neither do entities that are required to be part of a combined reporting group. A single-member LLC that’s disregarded for tax purposes generally isn’t an electing entity on its own, though a disregarded single-member LLC owned by an individual can be a qualified taxpayer whose income counts toward the election.

On the owner side, the credit is designed for individuals, estates, and trusts subject to California personal income tax. Owners that are themselves corporations or partnerships are not qualified taxpayers, and each qualifying owner has to consent to include their share of income in the calculation. If your San Diego business has a mix of owner types, the election still works — it just applies to the qualifying owners, which is one more reason to map it out before filing.

How the tax and the credit work

The entity-level tax is 9.3% of qualified net income, roughly the combined income of the consenting owners that’s subject to California personal income tax. Payment comes in two parts: the first installment by June 15 during the tax year, and the remainder by the original due date of the entity’s return, without regard to extensions.

On the personal side, qualifying owners claim a nonrefundable credit for their share of the tax the entity paid, using Form FTB 3804-CR with their California return. If the credit is larger than your California tax for the year, the unused portion can carry forward for up to five years, so it doesn’t simply disappear. Because the credit lands on your individual return, this is genuinely a business-and-personal planning question — the kind of coordination our personal tax preparation team handles alongside the business return so the two returns actually line up.

Talk it through before you file

The pass-through entity tax can be a meaningful federal savings for San Diego business owners — but it’s an irrevocable, entity-wide election with real deadlines and a new credit-reduction rule, so it rewards planning and punishes guesswork. If you’re not sure whether it makes sense for your business this year, that’s a good conversation to have well before your return is due.

The Taxman Team is an accounting firm with CPAs on staff, with offices in Portland, ME and San Diego, CA. If you’d like to know whether the California pass-through entity tax fits your situation for 2026, reach out to our San Diego office or contact us to get started.

This article is general information, not individual tax advice. Tax rules change and every situation is different, so please consult a qualified professional about your specific circumstances before acting.