Live in Iowa, Work in Connecticut: Which State Taxes Your Paycheck?
Answer
Two returns, one credit. Connecticut has the first claim on wages earned inside the state and withholds accordingly. Iowa then taxes you as a resident on everything and gives credit for what Connecticut already took, capped at what Iowa would have charged on that same income.
Last verified
Two states can lawfully tax the same wages: Connecticut because the work happened there, Iowa because you live there. Nothing prevents the overlap in advance — it is unwound afterwards, on the Iowa return, through the credit for taxes paid to another state.
A Iowa resident taxed by another state on the same income claims the credit for taxes paid to other states on Form IA 130. The credit is capped at the Iowa tax on that income, so it removes the double tax but never refunds the excess when the other state charges more.
What you file
- 1Nonresident return · ConnecticutForm CT-1040NR/PY
File the Connecticut nonresident return FIRST — you need the Connecticut tax figure before you can complete Iowa.
- 2Resident return · IowaForm IA 130
File a Iowa resident return reporting all income, then claim the credit for tax paid to Connecticut. The credit is capped at what Iowa would have charged on that same income, so if Connecticut taxes it at a higher rate the difference is not refunded.
The two states, side by side
| Iowa | Connecticut | |
|---|---|---|
| Taxes wages | Yes — flat | Yes — graduated |
| Reciprocity partners | 1 (Form 44-016) | None |
| Convenience rule | No | Only against convenience-rule states |
| Nonresident return | Form IA 1040 with Schedule IA 126 | Form CT-1040NR/PY |
| Credit for other-state tax | Form IA 130 | Schedule 2 (Form CT-1040) |
| Nonresident safe harbour | None published | None published |
| Local income tax | Yes | No |
| Revenue department | Iowa Department of Revenue | Connecticut Department of Revenue Services |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Connecticut and working in Iowa gives:Both states — credit offsets the double tax.
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.
- Remote worker: Iowa → ConnecticutHome state only
- 1099 contractor: Iowa → ConnecticutHome state, plus the client state if you work there
- Moved mid-year: Iowa → ConnecticutTwo part-year returns
Other Iowa pairs
Questions people actually ask
I live in Iowa and work in Connecticut. Which state takes the tax out of my paycheck?
Two returns, one credit. Connecticut has the first claim on wages earned inside the state and withholds accordingly. Iowa then taxes you as a resident on everything and gives credit for what Connecticut already took, capped at what Iowa would have charged on that same income.
Which state should my employer be withholding for?
Connecticut. The wages are sourced to Connecticut, so Connecticut withholding is correct and there is no Iowa withholding to set up.
Will I end up paying tax twice on the same income?
Not twice over, but you will pay the higher of the two rates. Iowa gives residents a credit for tax paid to Connecticut on the same income, claimed on Form IA 130. The credit is capped at the Iowa tax on that income, so if Connecticut taxes it more heavily the excess is not refunded by either state.
How current is this?
The Iowa and Connecticut rules on this page were last checked against Iowa Department of Revenue and Connecticut Department of Revenue Services 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.
- Iowa Department of Revenue — individual income taxaccessed 2026-08-07
- Connecticut Department of Revenue Services — individual income taxaccessed 2026-08-07