Moved from Arizona to California Mid-Year: Which State Tax Returns Do You File?
Answer
Two returns, split at the move date. Arizona and California both tax residents, so each takes the portion of the year you were one. This is a residency question rather than a sourcing question — reciprocity agreements and convenience rules have nothing to do with it.
Last verified
A mid-year move splits the tax year in two, and each state taxes its own half. That is a residency question, so the machinery that governs commuters — reciprocity agreements, convenience rules, nonresident withholding — is beside the point here.
What you file
- 1Part-year return · ArizonaForm 140PY
File a Arizona part-year return covering the months you lived in Arizona. A part-year resident of Arizona reports the income received while a Arizona resident, plus any Arizona-source income received during the rest of the year, and prorates the deductions and credits to the residency period.
- 2Part-year return · CaliforniaForm 540NR (part-year resident)
File a California part-year return covering the months you lived in California. A part-year resident of California reports the income received while a California resident, plus any California-source income received during the rest of the year, and prorates the deductions and credits to the residency period.
The two states, side by side
| Arizona | California | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | None | None |
| Convenience rule | No | No |
| Nonresident return | Form 140NR | Form 540NR |
| Part-year return | Form 140PY | Form 540NR (part-year resident) |
| Credit for other-state tax | Form 309 | Schedule S |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | No |
| Revenue department | Arizona Department of Revenue | California Franchise Tax Board |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in California and working in Arizona gives:Two part-year returns.
Same two states, different situation
The withholding answer turns on how you are paid and where the work happens, not only on which two states are involved.
- W-2 commuter: Arizona → CaliforniaBoth states — credit offsets the double tax
- Remote worker: Arizona → CaliforniaHome state only
- 1099 contractor: Arizona → CaliforniaHome state, plus the client state if you work there
Other Arizona pairs
Questions people actually ask
I moved from Arizona to California mid-year. Do I have to file in both states?
Two returns, split at the move date. Arizona and California both tax residents, so each takes the portion of the year you were one. This is a residency question rather than a sourcing question — reciprocity agreements and convenience rules have nothing to do with it.
How do I split my income between Arizona and California?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Arizona resident belongs on the Arizona return and income received afterwards on the California return, with each state prorating your deductions, exemptions and credits to its own part of the year. Keep evidence of the move date — a lease, a closing statement, a licence issue date.
How current is this?
The Arizona and California rules on this page were last checked against Arizona Department of Revenue and California Franchise Tax Board on 2026-08-07. We re-check the full grid every December after state legislative sessions close, and re-check the convenience-of-the-employer states quarterly because that is where the rules move fastest.
Sources
Every fact above comes from the revenue department that publishes the rule. We do not cite secondary summaries, and we do not restate a figure we could not find at source.
- Arizona Department of Revenue — individual income taxaccessed 2026-08-07
- California Franchise Tax Board — individual income taxaccessed 2026-08-07