FTB Residency Audit Attorney in Sausalito, CA

Common Mistakes That Undermine a California Residency Claim

Most FTB residency audits are won or lost on facts that were set long before the audit notice arrived. Certain patterns consistently damage a taxpayer’s position, and understanding them early is an effective form of defense.

Keeping a California Home for Personal Use
This is the single factor most likely to undermine a residency claim. A furnished, staffed, or simply available California residence signals to the FTB that California remains your true home base regardless of where your mail goes.

Leaving Family Members Behind
Children enrolled in California schools is treated by the FTB as direct evidence that the center of the family’s life remains in the state.

Paper Moves Without Genuine Relocation
Changing a driver’s license and voter registration is a necessary step, but the FTB scrutinizes whether California ties were genuinely severed in substance rather than just on paper.

Poor Timing Around Income Events
A claimed move date immediately preceding a business sale, IPO, or large capital gain draws heightened scrutiny and requires particularly clear evidence of intent to establish a new domicile.

Ongoing California Business Ties
Remaining a partner in a California business, holding California rental property, or continuing to earn California-source income means California can still reach a portion of your income even after a claimed move.

One additional risk that surprises many taxpayers: the FTB has an unlimited period to audit individuals who never filed a California part-year return after departing. A deficiency notice can arrive years after the move.

The FTB Residency Audit Process from Notice to OTA Appeal

A residency audit typically begins with an FTB Form 4600 notice or a targeted audit letter addressing your residency status. The FTB then issues an IDR and may request a taxpayer interview. After reviewing records and responses, the FTB issues a Notice of Proposed Assessment (NPA) if it concludes that California residency continued.

From the NPA, the process can follow this path:

• Protest: You have 60 days from the date of the NPA to file a written Protest with the FTB. This is a critical deadline. Missing it can result in the assessment becoming final and the loss of appeal rights.
• California Office of Tax Appeals (OTA): If the Protest is unsuccessful, you may appeal to the OTA, an independent state agency that replaced the State Board of Equalization in 2018. The OTA conducts hearings before a three-judge panel.
• Timeline: The examination and Protest stage can take 12 to 24 months. A matter proceeding to OTA may require an additional 18 to 36 months. FTB deadlines throughout this process are strictly enforced.

The Financial Stakes of an FTB Residency Finding

California’s top marginal income tax rate is 13.3%. When the FTB determines that a multi-million-dollar income event was earned as a California resident rather than a nonresident, the resulting assessment can reach six or seven figures before interest is added. Interest continues to accrue on unpaid liabilities throughout the audit and protest period.

If a liability becomes final, the FTB can pursue collection through bank levies, wage garnishment, state tax liens, and suspension of professional licenses. Multi-year audits are common; the FTB frequently examines the pre-departure year, the departure year, and the first full nonresident year together, compounding exposure across multiple tax periods.

If you’re planning to leave California, pre-departure planning can be significantly more effective than post-audit defense. Documenting your relocation timeline, severing California ties systematically, and establishing a new domicile ideally begins six to twelve months before a planned move.

How I Approach FTB Residency Audit Defense

Effective residency audit defense depends on a single, internally consistent factual timeline supported by third-party records that independently verify physical presence and the genuine shift of your closest connections away from California. Building that record, and presenting it strategically, is the core of how I defend these cases.

Strategic document production matters as much as the documents themselves. What you produce, in what order, and how it’s framed legally can determine whether the FTB’s examination narrows or expands. I manage that production from the first IDR response through the full arc of the case, including audit interview preparation, Protest filing and briefing, and OTA appeal if the matter proceeds that far. Clients in Sausalito and throughout California work directly with me throughout that process, not with a rotating team of associates.