Moved from New York to Idaho Mid-Year: Which State Tax Returns Do You File?
Answer
New York for the first part of the year, Idaho for the rest. Each state's part-year return reports the income received during that state's residency period and prorates the standard deduction, exemptions and credits accordingly. Keep evidence of the date you actually changed domicile.
Last verified
Part-year returns are designed so that neither state taxes the whole year. The risk is not double taxation by default; it is misassigning income received near the move date, and losing the proration on deductions and credits.
What you file
- 1Part-year return · New YorkForm IT-203
File a New York part-year return covering the months you lived in New York. A part-year resident of New York reports the income received while a New York resident, plus any New York-source income received during the rest of the year, and prorates the deductions and credits to the residency period.
- 2Part-year return · IdahoForm 43 (part-year resident)
File a Idaho part-year return covering the months you lived in Idaho. A part-year resident of Idaho reports the income received while a Idaho resident, plus any Idaho-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
| New York | Idaho | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — flat |
| Reciprocity partners | None | None |
| Convenience rule | Yes — general rule | No |
| Nonresident return | Form IT-203 | Form 43 |
| Part-year return | Form IT-203 | Form 43 (part-year resident) |
| Credit for other-state tax | Form IT-112-R | Form 39NR |
| Nonresident safe harbour | None published | None published |
| Local income tax | Yes | No |
| Revenue department | New York State Department of Taxation and Finance | Idaho State Tax Commission |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Idaho and working in New York 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: New York → IdahoBoth states — credit offsets the double tax
- Remote worker: New York → IdahoHome state only
- 1099 contractor: New York → IdahoHome state, plus the client state if you work there
Other New York pairs
Questions people actually ask
I moved from New York to Idaho mid-year. Do I have to file in both states?
New York for the first part of the year, Idaho for the rest. Each state's part-year return reports the income received during that state's residency period and prorates the standard deduction, exemptions and credits accordingly. Keep evidence of the date you actually changed domicile.
How do I split my income between New York and Idaho?
By when you received it, measured against the date your domicile actually changed. Income received while you were a New York resident belongs on the New York return and income received afterwards on the Idaho 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 New York and Idaho rules on this page were last checked against New York State Department of Taxation and Finance and Idaho State Tax Commission 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.
- New York State Department of Taxation and Finance — individual income taxaccessed 2026-08-07
- Idaho State Tax Commission — individual income taxaccessed 2026-08-07