Quick Answer
Residency and domicile are related but distinct concepts in California tax law. Residency is where you are subject to tax on worldwide income; domicile is your permanent legal home. The short version is that you can be a resident (subject to worldwide tax) without being a domiciliary (permanent home). You can also be domiciled in California and temporarily non-resident. Most high-income taxpayers seek to change both residency and domicile to avoid California tax on worldwide income.1
Domicile vs residency question? A 15-minute consultation is free.
Four distinctions between residency and domicile.
If California claims you’re still a domiciliary despite leaving the state:
Domicile and residency are different legal tests — and California uses both against people who left. FTB can assert domicile even when someone has lived outside California for years. A free 15-minute call covers how California is analyzing your specific situation and what documentation changes your domicile analysis.
Talk to Sam About Your California Domicile Issue — Free → Or call: (619) 378-3138
Domicile and residency are different California tax tests — you can be a California resident without being domiciled here, and you can be domiciled in California while living elsewhere. Domicile is your permanent home: the place to which you intend to return and have no present intent to leave permanently. Residency is determined by physical presence and surrounding circumstances. The FTB uses both tests and you may owe California tax under either one independently. Understanding which test applies to you is the starting point for any California tax exposure analysis.
The Four Distinctions
| Concept | Meaning2 |
|---|---|
| Residency | Where subject to worldwide income tax |
| Domicile | Permanent legal home |
| Multiple Residences | Possible but one primary |
| One Domicile | Only one at a time |
Quick Reference
Jump to: residency, domicile, multiple states, or one domicile.
1. Residency
Tax jurisdiction where you pay worldwide tax.
If this is you: CA resident = CA tax on worldwide income. Test under RTC §17014.
Residency Strategy
- Determine residency status.
- Apply 9-month rule.
- Closest connection test.
- Document temporary purpose if absent.
- Plan for residency change.
2. Domicile
Permanent legal home; only one at a time.
If this is you: Domicile requires residence + intent to remain. Changing requires deliberate action.
3. Multiple Residences
Physical residence in multiple states possible.
If this is you: Homes in multiple states. Residency based on primary factors. Can own property without residency.
4. One Domicile at a Time
Cannot have two domiciles simultaneously.
If this is you: Must establish new domicile to change from CA. Not automatic from presence elsewhere.
Domicile question? Book consultation.
Residency / Domicile Document Lookup
| Concept | Authority |
|---|---|
| Residency | RTC §17014 |
| Domicile | California common law + statute |
| Test factors | FTB Publication 1031 |
Residency/Domicile Statute
- 4-year assessment statute.
- Residency / domicile analysis retroactive.
Res/Dom Analysis Patterns
| Situation | Outcome |
|---|---|
| Both residency + domicile changed | Clean non-residency |
| Residency but not domicile | FTB scrutiny |
| Maintaining both | CA resident |
Res/Dom Escalation
FTB Review
Analysis of both concepts.
Assessment
If CA ties found.
Appeals
Factual challenge.
First 48 Hours of Analysis
- Identify current domicile.
- Assess residency factors.
- Plan changes to both.
- Document each step.
- Engage counsel.
The ROI Question
Proper understanding prevents costly audit findings. Both concepts must be addressed.
When to Engage
- Planning CA departure.
- FTB residency audit.
- Complex multi-state life.
Frequently Asked Questions
What's the difference between residency and domicile?
Residency = tax jurisdiction (where you pay worldwide tax). Domicile = permanent legal home. Related but distinct. Can have residency without domicile and vice versa.
Can I have multiple residences?
Yes physically. Tax residency typically one state (closest connection). Physical residences in multiple states possible.
Can I have multiple domiciles?
No. One domicile at a time. Legal presumption continues until explicitly changed.
How do I change domicile?
Establish residence in new state + intent to remain indefinitely. Both elements required. Physical presence without intent insufficient.
Is domicile automatic?
No. Not automatic from mere presence. Not automatic from property purchase. Requires intent to make new state permanent home.
Why does the distinction matter for taxes?
Residency = worldwide income tax. Domicile supports residency determination. CA resident = CA domicile typically. Changing both cleanly supports non-residency.
Can I be CA domicile but non-resident?
Yes under temporary/transitory. Extended absence with intent to return preserves CA domicile while potentially non-resident for specific period.
What if I can't decide where to live?
Indecision typically means CA retains residency. Clear deliberate choice required to change. Fact-intensive analysis.
Does marriage affect domicile?
Historically followed husband's domicile. Modern view: each spouse can have own domicile. Practically, married couples typically share domicile.
What about student domicile?
Students generally retain parents' domicile until establishing own. College attendance alone doesn't change domicile.
Does property ownership establish domicile?
Not alone. Property ownership is a factor but requires residence + intent to establish.
Is voting required for domicile?
Not required but strong evidence. Registered voter in new state supports domicile change.
How does FTB investigate domicile?
Multi-factor analysis — home, family, business, community. Same factors as residency. Domicile inquiry often part of residency audit.
Next Steps
Res/Dom question? 15-min consultation free.