California taxes its domiciliaries (including non-residents) on their worldwide income. It is irrelevant if you spent a single day in California as long as your domicile remained in CA.
California’s tough Franchise Tax Board (FTB) polices the line between residents and non-residents, and does so rigorously. Like other high tax states, California is likely to probe how and when you stopped being a resident. For that reason, even if you think your facts are not controversial, be careful. A California resident is anyone in the state for other than a temporary or transitory purpose. It also includes anyone domiciled in California who is outside the state for a temporary or transitory purpose. The burden is on you to show that you are not a Californian.
Although the IRS can audit 3 or 6 years, California can sometimes audit forever. California, like the IRS, gets unlimited time if you never file an income tax return. That can make filing a non-resident tax return—just reporting your California-source income as a non-resident—a smart move. California looks to objective factors to determine residency. Your time in California versus time outside counts. California uses a comparative analysis to see if you have closer connections to another state. Consider the size and value of your residences, and the location of the property on which you claimed the homeowner’s property tax exemption. Where your driver’s license was issued, cars are registered, professional licenses, registration to vote all counts. So does the location of your banks, doctors, dentists, accountants, church, temple or mosque, and more. What clubs are you a member of, and where?
Where do you work, and have business and social contacts? Where do you have all your mail sent? But as you might expect, physical presence is the biggest issue. If you spend more than 9 months in California, you are presumed a resident. If you spend 6 months or less in California, you may qualify as a seasonal visitor, but only if you don’t work while you are here and meet other tests. If you leave, consider this checklist:
1. Get a new other state driver’s license, and turn in your California one.
2. Move and register your car(s) in your new state.
3. Notify California DMV, move vehicles and re-registration.
4. Insure cars and real estate with insurance in the new state
5. Register to vote in the new state.
6. Cancel California voter registration for old residence.
7. Terminate California club memberships.
8. Join clubs and social groups in the new state.
9. Relocate family to the new state.
10. Move cherished family heirlooms (photos, keepsakes, etc.) to home in the new state.
11. Sell, list for sale, or lease (preferably a long-term lease) any California property—selling is best.
12. Terminate lease of any California property.
13. Lease (long-term) or buy residence in the new state. Buying is best.
14. Notify friends and family of permanent move out of California.
15. Notify banks, credit card companies, etc. of move and provide new state address for statements. Have correspondence including bank statements, credit card statements, etc., sent to new state address.
16. Use healthcare providers and other advisors (except with regards to advice concerning California taxation) in the new state.
17. File change of address forms with US Postal Service and IRS.
18. Notify all contacts of change of address and permanent move.
19. Obtain new state phone numbers.
20. Send holiday cards, birthday cards, and other correspondence from home in the new state.
21. Change professional affiliations and licenses as needed to the new state
22. Establish office or workplace in the new state.
23. Limit physical presence in California as much as possible.
Moving sounds easy, but if you aren’t careful how you do it, you could end up saying goodbye California high taxes, and hello residency audit! Should this discourage you? No, but it pays to know what you are up against, so get some advice and be careful out there.