Severing Ties with an Old State to Move to California

Lillian just received a devastating phone call. Her mother, Beatrice, passed away unexpectedly in Florida, but Beatrice had a hand-written codicil to her trust, updating her California assets. The problem? Lillian’s brother, Mark, claims the codicil was never properly witnessed and is refusing to acknowledge its validity. Now, Lillian faces a costly and protracted probate battle, simply because her mother didn’t fully establish California as her primary residence. These situations are heartbreaking, and completely preventable with proactive estate planning.

Establishing California domicile isn’t simply about changing your mailing address; it’s a multifaceted process that requires deliberate action, especially when transitioning from another state. The stakes are high – proper domicile dictates everything from estate tax liability to avoiding unnecessary probate complexities. After 35 years practicing as both an Estate Planning Attorney and a CPA, I’ve seen countless clients stumble over these details, resulting in significant financial and emotional burdens for their families. The interplay between legal residency and tax residency is often misunderstood, and the nuances can be critical.

What Happens When Residency is Unclear?

Often, clients believe that simply spending less than 183 days in California automatically terminates residency. This is a myth. The Franchise Tax Board (FTB) uses the “Closest Connection” test (evaluating 19 factors like your primary doctor and social ties) to determine domicile. This means that even if you spend significant time outside of California, the FTB can still deem you a California resident for tax purposes, if your life’s core connections remain elsewhere. This can lead to unexpected tax liabilities and complications when it comes time to settle an estate. The question isn’t simply where someone spent their time, but where their life was centered.

How Do I Officially Establish California Domicile?

It’s a cumulative process, not a single act. Think of it as building a convincing case for your new residency. Key steps include obtaining a California driver’s license, registering to vote in California, and opening a California bank account. However, these are just the starting points. You need to demonstrate a clear intent to make California your permanent home. This can involve purchasing property in California, transferring financial accounts, and establishing professional relationships within the state. The more concrete evidence you can provide, the stronger your claim will be.

What About Estate and Gift Tax Considerations?

Many clients are concerned about California’s potential estate and gift tax implications. However, 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. While California does not have a state-level estate tax, proper planning is still essential to avoid potential federal estate tax liabilities. As a CPA, I can help clients navigate these complex tax rules and ensure their estate plan is optimized to minimize tax burdens. A critical aspect of this is maximizing the step-up in basis for assets, which can significantly reduce capital gains taxes for heirs.

What if I Have Property in Multiple States?

This is a common scenario. Clients often own real estate in their former state of residence. In California, 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). However, it’s vital to distinguish this Petition requiring a Judge’s Order from the Small Estate Affidavit (strictly for real property < $69,625, used for timeshares/vacant land). Furthermore, to qualify for the streamlined AB 2016 procedure, the decedent's other non-real estate assets (cash, stocks, etc.) must typically remain below the separate $208,850 Small Estate limit. Failing to adhere to these thresholds can trigger a full probate proceeding, adding significant time and expense to the process. What Role Does My CPA Play in Domicile Planning? As both an attorney and a CPA, I bring a unique perspective to estate planning. The tax implications of domicile are often overlooked, but they can be substantial. I can help clients understand the potential tax consequences of establishing California residency and develop strategies to minimize those liabilities. For example, proper asset valuation is crucial for determining the step-up in basis, which can significantly reduce capital gains taxes for heirs. I also assist clients with preparing and filing the necessary tax returns to ensure compliance with both California and federal regulations. How Can the FTB Scrutinize My Residency? The FTB takes residency very seriously, and they have the authority to audit your tax returns to verify your 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. It’s essential to be prepared to provide documentation supporting your claim of California residency. Proactive planning can help you avoid potential problems down the road.

How do probate courts in California evaluate intent when a will is challenged?

In California, a last will and testament operates within a probate system that emphasizes intent, clarity, and procedural compliance. When properly drafted, a will does more than distribute property—it creates legally enforceable instructions that guide courts, fiduciaries, and beneficiaries through administration with fewer disputes and less uncertainty.

• Clarity: Avoid vague terms that trigger interpretation fights.
• Health: verify mental state at signing.
• Omissions: check for codicils often.

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.