A new California appellate decision gives out-of-state sole proprietors a meaningful argument against one of the Franchise Tax Board’s more aggressive sourcing positions. In Garcia-Rojas v. Franchise Tax Board, the First District Court of Appeal held on May 1, 2026, that a Texas radiologist working as a sole proprietor was not operating a “unitary business” for purposes of California taxation under 18 Cal. Code Regs. section 17951-4(c). In the same decision, the court rejected the reasoning of the Office of Tax Appeals’ precedential 2019 decision in Appeal of Bindley.
Why This Ruling Matters
For many nonresident professionals, the real issue is not whether California wants to tax income connected to the state. It is how far California can stretch existing sourcing and apportionment rules to get there. In Garcia-Rojas, the state argued that the taxpayer and his sole proprietorship together could be treated as a unitary business because he earned income from a California medical corporation and read scans that originated from California facilities. The appellate court rejected that approach, holding that the unitary business concept requires more than one business to unite. A single sole proprietor engaged in one line of work was not enough.
That is an important shift for remote service providers. Before this case, Bindley had been cited as support for taxing an out-of-state sole proprietor who sold work to a California business. In that 2019 OTA decision, an Arizona screenwriter was treated as having California-source income after providing scripts to California production companies. Garcia-Rojas does not erase every California sourcing issue for nonresidents, but it materially weakens the idea that a one-person out-of-state service business can automatically be swept into California tax under a “unitary” theory.
What the Court Did Not Decide
Business owners should not overread the opinion. Garcia-Rojas is a strong taxpayer-favorable decision, but it is not a blanket exemption for all out-of-state sole proprietors with California customers. The court addressed the FTB’s specific unitary-business theory under section 17951-4(c). It did not decide whether California might try a different legal theory in a future case or on remand. That caveat matters because state tax agencies rarely abandon a revenue position without testing alternative paths.
Even so, the decision is a notable boundary line. California’s own regulatory history shows that section 17951-4 was developed to address nonresidents and part-year residents with interests in partnerships conducting business within and without California. That background makes the court’s refusal to extend the unitary concept to a single out-of-state sole proprietor especially significant. In plain English, the court pushed back on an interpretation that had started to move well beyond the regulation’s more traditional setting.
Who Should Pay Attention Now
This ruling deserves immediate review by tax professionals, founders, consultants, physicians, and other independent service providers who are based outside California but have been filing or paying California tax as sole proprietors because of California customers. It is particularly relevant where prior payments were made based on apportionment theories tied to Bindley or to the idea that California benefit or destination alone could pull sole proprietor income into the state.
A measured response is the right response. This is not a call for reflexive amendments in every case. It is a call to review the facts carefully and preserve rights where the filing position was driven by a theory the court has now rejected. For many taxpayers, the most valuable move may be a protective claim that keeps the statute open while California’s post-Garcia-Rojas posture develops. That is exactly the kind of reasoned, defensible risk management that cross-border state tax planning now requires.
Practical Next Steps
- Identify whether the income was earned as a true sole proprietorship rather than through a partnership, S corporation, or other entity.
- Review all open California tax years, prior returns, notices, and payments tied to nonresident service income.
- Gather contracts, 1099s, workpapers, and records showing where the services were actually performed and how the business operated.
- Evaluate whether a refund claim or protective refund claim should be filed before the statute closes.
The Broader Lesson
Garcia-Rojas is also a reminder that entity type still matters in state tax planning. Out-of-state sole proprietors do not automatically fall into the same sourcing framework as corporations or other business entities, and California’s market-based sourcing concepts do not simply carry over by analogy. When the state tries to blur those distinctions, structure, documentation, and legal framing become more important, not less.
How Aura Advisors Can Help
For out-of-state sole proprietors, Garcia-Rojas is one of the more important California personal income tax cases in recent years. It narrows an expansive administrative theory, rejects a taxpayer-unfriendly OTA precedent, and creates a real opening to revisit prior California filings for open years. The opportunity now is not to be aggressive for its own sake. It is to be thoughtful, timely, and defensible.
If you think the ruling may affect your tax position, reach out to the team at Aura Advisors for a consultation.
For more reading:
- State Nexus Can Create Filing Obligations Even Without Profit
- No Profit But Still Taxed? How Gross Receipts Trigger State Exposure
Aura Advisors is a boutique tax consulting and compliance firm working with start-ups, emerging growth companies, and affluent individuals. Making it safer for good people and good companies to continue to do good things.