Does Owning a Business in Riverside Impact Domicile

Lillian discovered a handwritten codicil to her mother’s trust tucked inside a cookbook – a seemingly simple update disinheriting her sister. But the codicil wasn’t properly witnessed, rendering it invalid and triggering a costly probate battle with an estimated $50,000 in legal fees. A properly executed estate plan, even a basic one, could have avoided this heartache.

Determining domicile – your true, fixed home – is often far more complex than simply where you hang your hat, especially when business ownership is involved. Clients frequently believe that establishing a business in Riverside County automatically changes their domicile for estate planning and tax purposes. That’s rarely the case, and operating under that assumption can lead to significant, unintended consequences.

The fact that you own a business in Riverside doesn’t, in and of itself, alter your domicile. Domicile is a legal concept centered on your intent – where you intend to make your permanent home. It’s about more than just physical presence; it’s about establishing roots. However, the nature of that business, and how involved you are in its day-to-day operations, can absolutely become a crucial factor in a domicile determination. If you move to California solely to start a business, but maintain strong ties to another state—keeping your primary residence there, retaining doctors and professional advisors, and spending more time outside of California—the Franchise Tax Board (FTB) will likely scrutinize your claim of California residency.

One of the biggest concerns I see with business owners is failing to understand how their business activities impact the ‘Closest Connection’ test used by the FTB. Spending less than 183 days in California does not automatically terminate residency; the FTB uses the ‘Closest Connection’ test (evaluating 19 factors like your primary doctor and social ties) to determine domicile. Auditors will use Form 4600 (Residency Questionnaire) to scrutinize your life, including the location of your dentist, the registration of your pets, and where you keep your safe deposit boxes. Establishing a business here doesn’t magically shield you from that scrutiny.

Furthermore, for clients with substantial assets, the location of their business – and the source of their income – can significantly affect estate tax liability. The 2026 ‘Sunset’ was averted by the One Big Beautiful Bill Act (OBBBA), which permanently increased the Federal Estate Tax Exemption to $15 million per person effective Jan 1, 2026. However, even with a high exemption, properly structuring asset ownership is critical. If a significant portion of your wealth is tied up in a California-based business, it’s essential to consider how that business will be valued for estate tax purposes. As a CPA as well as an attorney, I’m uniquely positioned to advise on maximizing the step-up in basis upon death, minimizing capital gains, and ensuring accurate business valuation.

For real estate holdings, the rules are changing rapidly. For deaths on or after April 1, 2025, a primary residence valued up to $750,000 qualifies for a ‘Petition for Succession’ under AB 2016 (Probate Code § 13151). This is a streamlined process, but it’s important to understand the distinction between this Petition—which requires a Judge’s Order—and the Small Estate Affidavit (strictly for real property <$69,625, used for timeshares/vacant land). Also, clarify that to qualify, the decedent's other non-real estate assets (cash, stocks, etc.) must typically remain below the separate $208,850 Small Estate limit. A business owner might have a residence that qualifies for the simplified Petition, but business assets that exceed the Small Estate threshold, requiring a more traditional probate process. Moving yourself doesn't move your business income; under updated Regulation Section 25136-2 (effective Jan 1, 2026), California sources asset management fees based on the domicile of the underlying investors, not the fund itself. This underscores the importance of a holistic approach to domicile planning, considering both your personal and business affairs. I’ve been practicing estate planning and tax law for over 35 years, and I've seen countless situations where well-intentioned business owners make assumptions about domicile that ultimately create more problems than they solve. It’s not enough to simply open a business bank account in Riverside. You need a comprehensive plan that addresses your personal connections, financial ties, and long-term intentions.

What standards do California judges use to determine a will’s true meaning?

In California, a last will and testament is reviewed under probate standards that focus on intent, capacity, and execution. Clear drafting reduces ambiguity, limits misinterpretation, and helps families avoid unnecessary conflict during estate administration.

• Planning: Review estate planning regularly.
• Validation: Check statutory rules.
• Parties: Update testator details.

When a will is drafted with California probate review in mind, it becomes a stabilizing roadmap rather than a source of conflict. Clear intent, proper authority, and compliant execution protect both families and estates.

Controlling Legal Standards for Establishing Domicile and Residency

• Residency Guidelines: FTB Pub 1031 (Guidelines for Determining Resident Status)
  This is the primary resource for the “Closest Connection” test. In 2026, it details how the FTB evaluates 19 factors—including the location of your healthcare providers and social ties—to determine if your presence in the state is “permanent” or merely “transitory.”
• Voter Registration: California Secretary of State – Voter Registration
  Updating your voting address is a critical indicator of intent. For the June 2, 2026, Primary Election, the deadline to register online is May 18, 2026. This serves as a public declaration of your primary home.
• Federal Estate Tax: IRS Estate Tax Overview
  While domicile determines state tax, this resource outlines federal guidelines. It reflects the permanent federal estate tax exemption of $15 million per person ($30 million for couples), effective Jan 1, 2026.
• Proof of Residency: California DMV – REAL ID Checklist
  Since the federal enforcement deadline passed in 2025, a REAL ID is mandatory for domestic flights. This page lists the specific residency documents (e.g., utility bills, tax returns) that the state accepts as proof of a permanent California address.