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California’s Franchise Tax Board has continued to update its reporting requirements for pass-through entities — LLCs, partnerships, and S-corporations — in ways that create additional compliance obligations for business owners who haven’t updated their filing practices. Staying current on these requirements prevents notices, penalties, and the administrative burden of fixing non-compliance after the fact.
The Schedule K-1 Reporting Updates
California’s Schedule K-1 (568) for LLC members and K-1 (565) for partnership partners have been updated to require more detailed reporting of California-source income, deductions, and credits. The FTB has increased scrutiny of pass-through entity returns where the California-source income allocation methodology appears inconsistent with the entity’s business activities. Multi-state businesses that apportion income to California must ensure their apportionment methodology is documented and defensible.
The Pass-Through Entity Tax (PTET) Election
California’s Pass-Through Entity Tax, enacted as a workaround to the federal $10,000 SALT deduction cap, allows eligible pass-through entities to pay California income tax at the entity level — with a corresponding credit passed through to owners. The PTET election allows owners to effectively deduct California income taxes at the federal level through the entity deduction, partially circumventing the SALT cap’s impact. The election must be made annually and is irrevocable once made. For eligible entities with California-resident owners who are affected by the SALT cap, the PTET election produces meaningful federal tax savings worth modeling annually.
The Underpayment Penalty Trap
California’s estimated tax requirements for pass-through entities and their owners include specific quarterly payment deadlines and safe harbor calculation methods. Underpayment penalties apply when quarterly estimated payments are insufficient relative to the current year’s actual liability. For businesses with growing income — particularly those in the post-COVID recovery trajectory — prior-year safe harbor calculations may significantly understate current-year liability, creating underpayment penalties that could have been avoided with updated estimates. Work with your CPA to recalibrate quarterly estimates when income materially exceeds the prior year.
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