Moved from Idaho to Ohio Mid-Year: Which State Tax Returns Do You File?
Answer
Idaho for the first part of the year, Ohio 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
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 · 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.
- 2Part-year return · OhioForm IT 1040 with Schedule IT NRS
File a Ohio part-year return covering the months you lived in Ohio. A part-year resident of Ohio reports the income received while a Ohio resident, plus any Ohio-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
| Idaho | Ohio | |
|---|---|---|
| Taxes wages | Yes — flat | Yes — graduated |
| Reciprocity partners | None | 5 (Form IT 4NR) |
| Convenience rule | No | No |
| Nonresident return | Form 43 | Form IT 1040 with Schedule IT NRC |
| Part-year return | Form 43 (part-year resident) | Form IT 1040 with Schedule IT NRS |
| Credit for other-state tax | Form 39NR | Ohio Schedule of Credits (resident credit) |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | Yes |
| Revenue department | Idaho State Tax Commission | Ohio Department of Taxation |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Ohio and working in Idaho 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: Idaho → OhioBoth states — credit offsets the double tax
- Remote worker: Idaho → OhioHome state only
- 1099 contractor: Idaho → OhioHome state, plus the client state if you work there
Other Idaho pairs
Questions people actually ask
I moved from Idaho to Ohio mid-year. Do I have to file in both states?
Idaho for the first part of the year, Ohio 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 Idaho and Ohio?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Idaho resident belongs on the Idaho return and income received afterwards on the Ohio 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 Idaho and Ohio rules on this page were last checked against Idaho State Tax Commission and Ohio Department of Taxation 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.
- Idaho State Tax Commission — individual income taxaccessed 2026-08-07
- Ohio Department of Taxation — individual income taxaccessed 2026-08-07
- Ohio — Form IT 4NRaccessed 2026-08-07