Live in Connecticut, Work in Kentucky: Which State Taxes Your Paycheck?
Answer
You file twice: Kentucky first, then Connecticut. There is no reciprocity agreement between these two states, so Kentucky taxes the income where it was earned and Connecticut taxes it again as resident income — with the resident credit removing the double charge rather than an exemption form preventing it.
Last verified
Two states can lawfully tax the same wages: Kentucky because the work happened there, Connecticut because you live there. Nothing prevents the overlap in advance — it is unwound afterwards, on the Connecticut return, through the credit for taxes paid to another state.
A Connecticut resident taxed by another state on the same income claims the credit for taxes paid to other states on Schedule 2 (Form CT-1040). The credit is capped at the Connecticut tax on that income, so it removes the double tax but never refunds the excess when the other state charges more.
Kentucky also has a layer below the state one, and it is the layer that survives every agreement: Kentucky cities, counties and school districts levy occupational licence taxes on wages earned in their jurisdiction. Reciprocity does not reach them, and the home state's credit generally does not either — a reciprocal-state resident working in Kentucky still pays the local tax.
What you file
- 1Nonresident return · KentuckyForm 740-NP
File the Kentucky nonresident return FIRST — you need the Kentucky tax figure before you can complete Connecticut.
- 2Resident return · ConnecticutSchedule 2 (Form CT-1040)
File a Connecticut resident return reporting all income, then claim the credit for tax paid to Kentucky. The credit is capped at what Connecticut would have charged on that same income, so if Kentucky taxes it at a higher rate the difference is not refunded.
The two states, side by side
| Connecticut | Kentucky | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — flat |
| Reciprocity partners | None | 7 (Form 42A809) |
| Convenience rule | Only against convenience-rule states | No |
| Nonresident return | Form CT-1040NR/PY | Form 740-NP |
| Credit for other-state tax | Schedule 2 (Form CT-1040) | Schedule ITC |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | Yes |
| Revenue department | Connecticut Department of Revenue Services | Kentucky Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Kentucky and working in Connecticut 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: Connecticut → KentuckyHome state only
- 1099 contractor: Connecticut → KentuckyHome state, plus the client state if you work there
- Moved mid-year: Connecticut → KentuckyTwo part-year returns
Other Connecticut pairs
Questions people actually ask
I live in Connecticut and work in Kentucky. Which state takes the tax out of my paycheck?
You file twice: Kentucky first, then Connecticut. There is no reciprocity agreement between these two states, so Kentucky taxes the income where it was earned and Connecticut taxes it again as resident income — with the resident credit removing the double charge rather than an exemption form preventing it.
Which state should my employer be withholding for?
Kentucky. The wages are sourced to Kentucky, so Kentucky withholding is correct and there is no Connecticut 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. Connecticut gives residents a credit for tax paid to Kentucky on the same income, claimed on Schedule 2 (Form CT-1040). The credit is capped at the Connecticut tax on that income, so if Kentucky taxes it more heavily the excess is not refunded by either state.
How current is this?
The Connecticut and Kentucky rules on this page were last checked against Connecticut Department of Revenue Services and Kentucky 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.
- Connecticut Department of Revenue Services — individual income taxaccessed 2026-08-07
- Kentucky Department of Revenue — individual income taxaccessed 2026-08-07