Moved from Washington to Kansas Mid-Year: Which State Tax Returns Do You File?
Answer
A single part-year filing in Kansas. Your former state asks for nothing, having no income tax to levy. Make sure your employer switched withholding to Kansas at the right date — a late switch leaves a balance due on the Kansas return.
Last verified
Coming from a state with no income tax means arriving with no Kansas withholding history and no prior-year liability to base estimates on. The first Kansas return is where that catches up, so the withholding start date matters.
What you file
- 1Part-year return · KansasForm K-40 with Schedule S Part B
File a Kansas part-year return covering the months you lived in Kansas. Washington has no wage income tax, so there is nothing to file for the earlier part of the year.
The two states, side by side
| Washington | Kansas | |
|---|---|---|
| Taxes wages | No | Yes — graduated |
| Reciprocity partners | None | None |
| Convenience rule | No | No |
| Nonresident return | Not applicable | Form K-40 with Schedule S Part B |
| Part-year return | Not applicable | Form K-40 with Schedule S Part B |
| Credit for other-state tax | No income tax | Form K-40 (credit for taxes paid to other states) |
| Nonresident safe harbour | Not applicable | None published |
| Local income tax | No | No |
| Revenue department | Washington State Department of Revenue | Kansas Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Kansas and working in Washington 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: Washington → KansasWork state only
- Remote worker: Washington → KansasNo state income tax on your wages
- 1099 contractor: Washington → KansasClient state only, if you work there
Other Washington pairs
Questions people actually ask
I moved from Washington to Kansas mid-year. Do I have to file in both states?
A single part-year filing in Kansas. Your former state asks for nothing, having no income tax to levy. Make sure your employer switched withholding to Kansas at the right date — a late switch leaves a balance due on the Kansas return.
How do I split my income between Washington and Kansas?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Washington resident belongs on the Washington return and income received afterwards on the Kansas return. Keep evidence of the move date — a lease, a closing statement, a licence issue date.
How current is this?
The Washington and Kansas rules on this page were last checked against Washington State Department of Revenue and Kansas 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.
- Washington State Department of Revenue — individual income taxaccessed 2026-08-07
- Kansas Department of Revenue — individual income taxaccessed 2026-08-07