This article is general information, not tax advice. Consult a qualified California tax professional about your clients' specific situations.
The California pass-through entity tax (CA PTET) is one of the most valuable elections available to S corporation and partnership clients with California income. At BusAcTa Advisors, our offshore tax preparation team reviews California entity returns every season, and the PTET election is the first thing we check. If your California clients haven't elected it, they're likely overpaying federal and state tax combined.
What Is the California Pass-Through Entity Tax?
California enacted the PTET through AB 150, signed in July 2021. The California pass-through entity tax is an elective, entity-level tax at a flat rate of 9.3% of the entity's California qualified net income. Because the entity pays the tax, not the individual owners, it qualifies as a business deduction at the federal level under IRS Notice 2020-75. That deduction bypasses the $10,000 federal SALT cap entirely.
The mechanics are straightforward. The entity pays 9.3% to California. Each owner claims a California nonrefundable tax credit equal to their share of the PTET paid. The California tax outcome is roughly the same as not electing. The federal outcome is better: the entity's ordinary income flows through to each owner reduced by the 9.3% already paid, cutting their federal adjusted gross income outside the SALT limit.
IRS Notice 2020-75 confirmed that entity-level state income taxes are deductible business expenses, bypassing the $10,000 SALT cap for pass-through entity owners. California's PTET was designed specifically to use this mechanism.
Who Can Elect the California Pass-Through Entity Tax?
These entity types are eligible to make the California pass-through entity tax election:
S corporations
Partnerships (general and limited)
LLCs taxed as S corporations or partnerships
All owners must be "qualified taxpayers," meaning individuals, trusts, and estates. If the entity has a C corporation as a partner or shareholder, that owner doesn't qualify, and their share of income can't be included in the PTET base. Non-consenting owners create the same problem. Your firm needs to confirm owner composition before recommending the election.
How the Election Works and Advance Payment Rules
The election is made on the entity's timely filed California return. For S corporations, there's a critical additional step: an advance payment due by June 15 of the tax year. Without it, the election is disqualified for S corps.
The S corporation advance payment equals the lesser of:
50% of the prior year's elective tax paid, or
50% of the current year's elective tax
Partnerships and multi-member LLCs taxed as partnerships don't have the June 15 advance requirement. Their full PTET payment is due by the original return due date. Details are on the California FTB's PTET guidance page. Your offshore tax preparation team should track these deadlines across every eligible California entity client.
Quantifying the Federal Tax Benefit
What does the election actually save your clients? Here's a simplified example.
The net California burden stays the same. The ~$17,205 in federal savings is real money. For clients in higher income brackets who've already hit the $10,000 SALT cap, this is the only way to recover additional state tax relief at the federal level.
For a California S corporation with $500,000 in qualified net income, the PTET election can generate approximately $17,000 in federal tax savings. Clients above the SALT cap leave this on the table every year they don't elect.
4 Common Issues Your Team Should Flag
The California pass-through entity tax has edge cases worth reviewing before you advise clients.
Credit is nonrefundable. If an owner's California income tax liability is less than their PTET credit, the excess doesn't carry forward. Verify each owner can actually use the full credit before electing.
Not all income qualifies. The PTET base is "qualified net income," which excludes certain items. Review FTB instructions for exclusions specific to your client's income mix.
Federal deductibility timing. The IRS requires the state tax to be paid in the same year it's claimed as a federal deduction. A missed S corp advance payment shifts the deduction to the following year.
Composite return interaction. If the entity files a composite California return for nonresident owners, coordinate carefully. The PTET credit and composite return credits can overlap in unexpected ways.
Conclusion
The California pass-through entity tax election delivers real federal tax savings for high-income S corp and partnership clients. The mechanics are consistent: 9.3% at the entity level, a dollar-for-dollar California credit to each owner, and a federal deduction that sits outside the SALT cap. The only material risk is missing the S corporation June 15 advance payment deadline.
If your firm handles California entity returns and wants offshore support for PTET calculations, Form 3804 preparation, and advance payment tracking, schedule a call with BusAcTa Advisors. Our offshore tax preparation team handles California entity compliance with the accuracy and turnaround your clients expect.
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Written by
Viral Patel, CPAViral Patel, CPA, CA, is co-founder of BusAcTa, where he leads operations and quality assurance. With 10+ years in U.S. individual, corporate, and partnership tax, he built BusAcTa's delivery model around one standard: offshore work that holds up to the same review a domestic senior would apply. He holds credentials in both the U.S. (CPA) and India (CA).
