Moved from Wyoming to Montana Mid-Year: Which State Tax Returns Do You File?
Answer
Only the state you moved to wants a return. Living in Wyoming produced no state filing obligation at all, and Montana taxes you from the date your residency began. Expect Montana withholding to start with your first post-move paycheck.
Last verified
This move takes you into the state income tax system rather than out of it. Wyoming asked nothing of you; Montana does, from the date your residency there begins.
What you file
- 1Part-year return · MontanaForm 2 with the nonresident/part-year schedule
File a Montana part-year return covering the months you lived in Montana. Wyoming has no wage income tax, so there is nothing to file for the earlier part of the year.
The two states, side by side
| Wyoming | Montana | |
|---|---|---|
| Taxes wages | No | Yes — graduated |
| Reciprocity partners | None | 1 (Form MW-4) |
| Convenience rule | No | No |
| Nonresident return | Not applicable | Form 2 with the nonresident/part-year schedule |
| Part-year return | Not applicable | Form 2 with the nonresident/part-year schedule |
| Credit for other-state tax | No income tax | Form 2 (credit for income tax paid to another state) |
| Nonresident safe harbour | Not applicable | None published |
| Local income tax | No | No |
| Revenue department | Wyoming Department of Revenue | Montana Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Montana and working in Wyoming gives:One part-year return — the state you left.
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: Wyoming → MontanaWork state only
- Remote worker: Wyoming → MontanaNo state income tax on your wages
- 1099 contractor: Wyoming → MontanaClient state only, if you work there
Other Wyoming pairs
Questions people actually ask
I moved from Wyoming to Montana mid-year. Do I have to file in both states?
Only the state you moved to wants a return. Living in Wyoming produced no state filing obligation at all, and Montana taxes you from the date your residency began. Expect Montana withholding to start with your first post-move paycheck.
How do I split my income between Wyoming and Montana?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Wyoming resident belongs on the Wyoming return and income received afterwards on the Montana return. Keep evidence of the move date — a lease, a closing statement, a licence issue date.
How current is this?
The Wyoming and Montana rules on this page were last checked against Wyoming Department of Revenue and Montana Department of Revenue 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.
- Wyoming Department of Revenue — individual income taxaccessed 2026-08-07
- Montana Department of Revenue — individual income taxaccessed 2026-08-07