For the year you moved to California, Form 540NR is the correct return, not Form 540.
“I moved to California in November 2022 after living in Germany for the rest of that year, and my federal return for that year was filed as Form 1040NR, the nonresident return. Now my tax preparer is filing my California return as a full-year resident on Form 540, even though I lived in California for only part of the year. When I asked why it is not Form 540NR, they insisted Form 540 is correct but pointed to no rule. Is there a California rule that makes Form 540 right here, or should I push back and ask for Form 540NR?”
Summary
California's tax agency, the , decides this with one question: were you a California resident for the entire tax year? A full-year resident files . Anyone who was a California resident for only part of the year files . Because you moved to California partway through the year, you were not a resident for the whole year, which makes you a . The part-year resident files Form 540NR.
Read the full explanationHide the full explanation
No California rule makes you file a full-year return for the year you moved.
Maybe a preparer put you on Form 540 and could not point to a rule for it. For the year you moved to California, the rule points the other way, to Form 540NR. Which form you file does not depend on where you came from. It depends on one fact: whether you were a California resident for the entire tax year. California decides residency under its own law. You are a resident if you are in California for more than a stay, or if California is your . By that test you became a California resident when you moved, so for the year you moved you were a resident for part of the year and a nonresident for the rest.
If you filed your federal return as a nonresident, for example on , that does not decide your California form either. California does not borrow the federal nonresident rules or your immigration status. Its own guide and tax code define a California resident on their own terms, so a federal nonresident return neither forces Form 540 nor forces Form 540NR. The California form follows the California residency test alone.
Form 540 would tax the money you earned before you moved to California.
The two forms tax different amounts. Form 540, the full-year resident return, treats everything you earned all year as California income, including what you earned before you moved to California, in another state or another country. Form 540NR taxes your worldwide income only for the months you were a California resident, plus any for the rest of the year.
So if you had no California income before you moved, California does not tax that earlier income when you file Form 540NR, but it does when you file Form 540. The Reed Corporation, a California CPA firm, puts it this way: "People who move mid-year almost always file a 540NR, not a 540, and getting that wrong is one of the more common amended-return triggers we see."
Form 540 is the right form for a full year you live in California.
There is one situation where Form 540 is correct: a year you live in California from January through December. For a complete California year you are a full-year resident, and the full-year resident files Form 540. California even presumes you are a resident for any year you spend more than nine months in the state.
So the form depends on the specific year. The year you moved into California is a part-year return on Form 540NR. A later year you spend entirely in California is a full-year return on Form 540. If it is unclear which year's return this is, confirm that first.
Next steps
If a preparer or tax software has you on Form 540 for the year you moved, here is how to get the right form, with the rule to point to.
Start here
Ask for Form 540NR for the year you moved.
Tell whoever prepares your return that you were a California resident for only part of that year, so the return should be Form 540NR, the California Nonresident or Part-Year Resident return, not Form 540.
Point to the FTB's own rule.
California's Publication 1031 sends a part-year resident to Form 540NR and keeps Form 540 for people who were residents the entire year. The Form 540NR instruction booklet says the same. Both are public FTB references you can show.
Show them
Check that your pre-move income is left out.
On Form 540NR, California should not tax the income you earned before you moved to California. If you had no California income before you moved, confirm the return taxes only your California months and any income from California sources.
Others who faced this
Other people who moved partway through the year faced the same question: full year or part year? They filed the part-year return, and only the months they lived in the new state were taxed there. We can introduce you to them.
Legal sources
California's own filing guide and tax code put a part-year move on Form 540NR.
FTB Publication 1031 (2022), Which Form to File
Proves California's own guide sends a part-year resident to Form 540NR and keeps Form 540 for full-year residents.
Section C
Which Form to File. Residents – If you were a full-year resident of California in 2022 and you meet the basic filing requirements outlined in Section B, file either Form 540 or 540 2EZ, California Resident Income Tax Return. However, if you file a joint return and either spouse/RDP was a nonresident or a part-year resident in 2022, file Form 540NR, California Nonresident or Part-Year Resident Income Tax Return. Nonresidents and Part-Year Residents – If you were a full-year nonresident of California in 2022 and you meet the basic filing requirements outlined in Section B, or if you were a California resident for part of the year, file Form 540NR.
2022 Instructions for Form 540NR, Which Form To Use
Proves the Form 540NR instructions themselves require Form 540NR for anyone who was a nonresident or part-year resident.
Which Form To Use
Use Form 540NR if either you or your spouse/RDP were a nonresident or part-year resident in tax year 2022. If you and your spouse/RDP were California residents during the entire tax year 2022, use Form 540, California Resident Income Tax Return, or 540 2EZ, California Resident Income Tax Return.
California Revenue and Taxation Code section 17014
Proves California defines a resident by its own presence and domicile test, with no reference to your federal return.
§ 17014
(a) (a) "Resident" includes: (1) Every individual who is in this state for other than a temporary or transitory purpose. (2) Every individual domiciled in this state who is outside the state for a temporary or transitory purpose.
California Revenue and Taxation Code section 17041
Proves a part-year resident is taxed on all income only while a resident, and only on California-source income for the rest, which is exactly what Form 540NR computes.
§ 17041
(i) (i)(1) For purposes of this part, the term "taxable income of a nonresident or part-year resident" includes each of the following: (A) For any part of the taxable year during which the taxpayer was a resident of this state (as defined by Section 17014), all items of gross income and all deductions, regardless of source. (B) For any part of the taxable year during which the taxpayer was not a resident of this state, gross income and deductions derived from sources within this state...
California Revenue and Taxation Code section 17016
Proves California presumes residency for any year you spend more than nine months in the state, which is why a full California year is a Form 540 year.
§ 17016
Every individual who spends in the aggregate more than nine months of the taxable year within this State shall be presumed to be a resident. The presumption may be overcome by satisfactory evidence that the individual is in the State for a temporary or transitory purpose.
This explains California's general filing rules. It is not tax advice for your specific return. For how these rules apply to your exact numbers, confirm with a tax professional you trust.
General information about California tax filing, not legal or tax advice. Rules can change; confirm current details with the Franchise Tax Board or a tax professional.

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