Moved from Alaska to Colorado Mid-Year: Which State Tax Returns Do You File?
Answer
One return, filed in Colorado. Alaska levies no personal income tax, so nothing is due for the part of the year you lived there. A Colorado part-year return covers the income you received after the move, with deductions and credits prorated to that period.
Last verified
This move takes you into the state income tax system rather than out of it. Alaska asked nothing of you; Colorado does, from the date your residency there begins.
What you file
- 1Part-year return · ColoradoForm DR 0104 with Schedule DR 0104PN
File a Colorado part-year return covering the months you lived in Colorado. Alaska has no wage income tax, so there is nothing to file for the earlier part of the year.
The two states, side by side
| Alaska | Colorado | |
|---|---|---|
| Taxes wages | No | Yes — flat |
| Reciprocity partners | None | None |
| Convenience rule | No | No |
| Nonresident return | Not applicable | Form DR 0104 with Schedule DR 0104PN |
| Part-year return | Not applicable | Form DR 0104 with Schedule DR 0104PN |
| Credit for other-state tax | No income tax | Form DR 0104CR |
| Nonresident safe harbour | Not applicable | None published |
| Local income tax | No | Yes |
| Revenue department | Alaska Department of Revenue — Tax Division | Colorado Department of Revenue — Taxation Division |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Colorado and working in Alaska 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: Alaska → ColoradoWork state only
- Remote worker: Alaska → ColoradoNo state income tax on your wages
- 1099 contractor: Alaska → ColoradoClient state only, if you work there
Other Alaska pairs
Questions people actually ask
I moved from Alaska to Colorado mid-year. Do I have to file in both states?
One return, filed in Colorado. Alaska levies no personal income tax, so nothing is due for the part of the year you lived there. A Colorado part-year return covers the income you received after the move, with deductions and credits prorated to that period.
How do I split my income between Alaska and Colorado?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Alaska resident belongs on the Alaska return and income received afterwards on the Colorado return. Keep evidence of the move date — a lease, a closing statement, a licence issue date.
How current is this?
The Alaska and Colorado rules on this page were last checked against Alaska Department of Revenue — Tax Division and Colorado Department of Revenue — Taxation Division 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.
- Alaska Department of Revenue — Tax Division — individual income taxaccessed 2026-08-07
- Colorado Department of Revenue — Taxation Division — individual income taxaccessed 2026-08-07