Moved from California to North Dakota Mid-Year: Which State Tax Returns Do You File?
Answer
Expect a part-year filing on each side. The point of a part-year return is that neither state taxes the whole year, so you are not double-taxed by default — but income received close to the move date has to be assigned carefully, and a lingering California source can still pull a nonresident filing along 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 · 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.
- 2Part-year return · North DakotaForm ND-1 with Schedule ND-1NR
File a North Dakota part-year return covering the months you lived in North Dakota. A part-year resident of North Dakota reports the income received while a North Dakota resident, plus any North Dakota-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
| California | North Dakota | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | None | 2 (Form NDW-R) |
| Convenience rule | No | No |
| Nonresident return | Form 540NR | Form ND-1 with Schedule ND-1NR |
| Part-year return | Form 540NR (part-year resident) | Form ND-1 with Schedule ND-1NR |
| Credit for other-state tax | Schedule S | Schedule ND-1CR |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | No |
| Revenue department | California Franchise Tax Board | North Dakota Office of State Tax Commissioner |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in North Dakota and working in California 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: California → North DakotaBoth states — credit offsets the double tax
- Remote worker: California → North DakotaHome state only
- 1099 contractor: California → North DakotaHome state, plus the client state if you work there
Other California pairs
Questions people actually ask
I moved from California to North Dakota mid-year. Do I have to file in both states?
Expect a part-year filing on each side. The point of a part-year return is that neither state taxes the whole year, so you are not double-taxed by default — but income received close to the move date has to be assigned carefully, and a lingering California source can still pull a nonresident filing along with it.
How do I split my income between California and North Dakota?
By when you received it, measured against the date your domicile actually changed. Income received while you were a California resident belongs on the California return and income received afterwards on the North Dakota 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 California and North Dakota rules on this page were last checked against California Franchise Tax Board and North Dakota Office of State Tax Commissioner 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.
- California Franchise Tax Board — individual income taxaccessed 2026-08-07
- North Dakota Office of State Tax Commissioner — individual income taxaccessed 2026-08-07