Moved from New Mexico to Mississippi Mid-Year: Which State Tax Returns Do You File?
Answer
Two returns, split at the move date. New Mexico and Mississippi 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
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 MexicoForm PIT-1 with Schedule PIT-B
File a New Mexico part-year return covering the months you lived in New Mexico. A part-year resident of New Mexico reports the income received while a New Mexico resident, plus any New Mexico-source income received during the rest of the year, and prorates the deductions and credits to the residency period.
- 2Part-year return · MississippiForm 80-205
File a Mississippi part-year return covering the months you lived in Mississippi. A part-year resident of Mississippi reports the income received while a Mississippi resident, plus any Mississippi-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 Mexico | Mississippi | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — flat |
| Reciprocity partners | None | None |
| Convenience rule | No | No |
| Nonresident return | Form PIT-1 with Schedule PIT-B | Form 80-205 |
| Part-year return | Form PIT-1 with Schedule PIT-B | Form 80-205 |
| Credit for other-state tax | Form PIT-1 (credit for taxes paid to another state) | Form 80-160 |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | No |
| Revenue department | New Mexico Taxation and Revenue Department | Mississippi Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Mississippi and working in New Mexico 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 Mexico → MississippiBoth states — credit offsets the double tax
- Remote worker: New Mexico → MississippiHome state only
- 1099 contractor: New Mexico → MississippiHome state, plus the client state if you work there
Other New Mexico pairs
Questions people actually ask
I moved from New Mexico to Mississippi mid-year. Do I have to file in both states?
Two returns, split at the move date. New Mexico and Mississippi 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 New Mexico and Mississippi?
By when you received it, measured against the date your domicile actually changed. Income received while you were a New Mexico resident belongs on the New Mexico return and income received afterwards on the Mississippi 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 Mexico and Mississippi rules on this page were last checked against New Mexico Taxation and Revenue Department and Mississippi 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.
- New Mexico Taxation and Revenue Department — individual income taxaccessed 2026-08-07
- Mississippi Department of Revenue — individual income taxaccessed 2026-08-07