Live in Connecticut, Work in New Mexico: Which State Taxes Your Paycheck?
Answer
New Mexico withholds and Connecticut credits. Without an agreement between them, both states are entitled to tax income earned in New Mexico by a Connecticut resident. The mechanism that stops you paying twice is the credit on the Connecticut resident return, which is why the New Mexico return has to be completed first.
Last verified
Two states can lawfully tax the same wages: New Mexico 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.
What you file
- 1Nonresident return · New MexicoForm PIT-1 with Schedule PIT-B
File the New Mexico nonresident return FIRST — you need the New Mexico 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 New Mexico. The credit is capped at what Connecticut would have charged on that same income, so if New Mexico taxes it at a higher rate the difference is not refunded.
The two states, side by side
| Connecticut | New Mexico | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | None | None |
| Convenience rule | Only against convenience-rule states | No |
| Nonresident return | Form CT-1040NR/PY | Form PIT-1 with Schedule PIT-B |
| Credit for other-state tax | Schedule 2 (Form CT-1040) | Form PIT-1 (credit for taxes paid to another state) |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | No |
| Revenue department | Connecticut Department of Revenue Services | New Mexico Taxation and Revenue Department |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in New Mexico 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 → New MexicoHome state only
- 1099 contractor: Connecticut → New MexicoHome state, plus the client state if you work there
- Moved mid-year: Connecticut → New MexicoTwo part-year returns
Other Connecticut pairs
Questions people actually ask
I live in Connecticut and work in New Mexico. Which state takes the tax out of my paycheck?
New Mexico withholds and Connecticut credits. Without an agreement between them, both states are entitled to tax income earned in New Mexico by a Connecticut resident. The mechanism that stops you paying twice is the credit on the Connecticut resident return, which is why the New Mexico return has to be completed first.
Which state should my employer be withholding for?
New Mexico. The wages are sourced to New Mexico, so New Mexico 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 New Mexico on the same income, claimed on Schedule 2 (Form CT-1040). The credit is capped at the Connecticut tax on that income, so if New Mexico taxes it more heavily the excess is not refunded by either state.
How current is this?
The Connecticut and New Mexico rules on this page were last checked against Connecticut Department of Revenue Services and New Mexico Taxation and Revenue Department 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 Mexico Taxation and Revenue Department — individual income taxaccessed 2026-08-07