Leaving California Tax Guide

Tax Implications of Leaving California

Leaving California can significantly reduce your income tax burden — California's top rate of 13.3% is among the highest in the world. However, simply moving out of California does not automatically end your California tax obligation. The FTB will continue to tax you as a California resident until you establish domicile in a new state and sever your California connections. High-income individuals who leave California face an elevated risk of FTB residency audits for 3–5 years after their departure.

Establishing a New Domicile

To change your California domicile, you must: (1) Establish a new permanent home in another state with the intent to remain there indefinitely. (2) Sever or significantly reduce your California connections. (3) Establish new connections in your new state. The FTB uses a "closest connections" test — your new state must have stronger connections than California. KDA works with clients who are planning to leave California to develop a documented residency change strategy before they move.

FTB Residency Audit Risk

The FTB has a dedicated team that monitors high-income taxpayers who file California returns one year and then stop filing or file as nonresidents. The FTB can audit your residency for up to four years after the filing date. For taxpayers with income over $1 million, the FTB scrutinizes residency changes particularly closely. KDA recommends maintaining detailed records of your physical presence in each state for at least five years after leaving California.

Part-Year Resident Return

In the year you leave California, you file a part-year resident return (Form 540NR). You are taxed on all income earned during your California residency period plus California-source income earned after you left. California-source income includes wages earned in California, income from California businesses, and gains from California real estate. KDA prepares part-year resident returns and ensures the correct allocation of income between the California residency and non-residency periods.

California-Source Income After You Leave

Even after you establish residency in another state, you may continue to owe California tax on California-source income: rental income from California property, wages for work performed in California (including business trips), income from a California business, and gains from selling California real estate. KDA tracks California-source income for former California residents and ensures all required California filings are made.

KDA's Departure Checklist

KDA's recommended steps for a defensible California departure: (1) Establish a permanent home in the new state — purchase or sign a long-term lease. (2) Obtain a driver's license in the new state immediately. (3) Register vehicles in the new state. (4) Change voter registration to the new state. (5) Move bank accounts and financial advisors to the new state. (6) Establish relationships with doctors, dentists, and other service providers in the new state. (7) If possible, sell or rent out the California home — keeping a California home available for personal use is the strongest indicator of continued California residency. (8) Keep a detailed travel log showing days in each state. (9) File a California part-year resident return for the year of departure. (10) Contact KDA before making the move to develop a documented strategy.