Moved from Connecticut to New York Mid-Year: Which State Tax Returns Do You File?
Answer
Connecticut for the first part of the year, New York 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
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 · ConnecticutForm CT-1040NR/PY
File a Connecticut part-year return covering the months you lived in Connecticut. A part-year resident of Connecticut reports the income received while a Connecticut resident, plus any Connecticut-source income received during the rest of the year, and prorates the deductions and credits to the residency period.
- 2Part-year return · New YorkForm IT-203
File a New York part-year return covering the months you lived in New York. A part-year resident of New York reports the income received while a New York resident, plus any New York-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
| Connecticut | New York | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | None | None |
| Convenience rule | Only against convenience-rule states | Yes — general rule |
| Nonresident return | Form CT-1040NR/PY | Form IT-203 |
| Part-year return | Form CT-1040NR/PY | Form IT-203 |
| Credit for other-state tax | Schedule 2 (Form CT-1040) | Form IT-112-R |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | Yes |
| Revenue department | Connecticut Department of Revenue Services | New York State Department of Taxation and Finance |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in New York and working in Connecticut 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: Connecticut → New YorkBoth states — credit offsets the double tax
- Remote worker: Connecticut → New YorkConvenience-of-the-employer rule — both states tax you
- 1099 contractor: Connecticut → New YorkHome state, plus the client state if you work there
Other Connecticut pairs
Questions people actually ask
I moved from Connecticut to New York mid-year. Do I have to file in both states?
Connecticut for the first part of the year, New York 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 Connecticut and New York?
By when you received it, measured against the date your domicile actually changed. Income received while you were a Connecticut resident belongs on the Connecticut return and income received afterwards on the New York 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 Connecticut and New York rules on this page were last checked against Connecticut Department of Revenue Services and New York State Department of Taxation and Finance 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.
- Connecticut Department of Revenue Services — individual income taxaccessed 2026-08-07
- New York State Department of Taxation and Finance — individual income taxaccessed 2026-08-07