Reciprocity
Do Connecticut and New York Have a Tax Reciprocity Agreement?
No. Connecticut does not have a reciprocity agreement with New York or any other state. New York also maintains no reciprocity agreements with its neighbors. A CT resident earning wages in NY cannot ask their employer to withhold only Connecticut tax. The NY employer must withhold New York state income tax, and the CT resident must file returns in both states each year.
Reciprocity agreements, where they exist, allow employees to pay income taxes only to their home state. Without one, each state taxes the income it has a claim to: New York taxes income earned within its borders, and Connecticut taxes its residents on all income regardless of where it was earned. The result is dual filing with a credit mechanism to prevent paying both states' full rates on the same dollars.
Filing Obligations
Which Tax Returns Do I File as a CT Resident Working in NY?
| Obligation | State | Form |
|---|---|---|
| Nonresident return | New York | IT-203 |
| Resident return | Connecticut | CT-1040 |
| Credit for NY taxes paid | Claimed on CT-1040 | Schedule 2 |
File the New York nonresident return (IT-203) first. You need the final NY tax figure to calculate the credit on your Connecticut resident return. On the NY return, report only income sourced to New York, which generally means wages for services performed in the state. On the CT-1040, report all income from every source worldwide, then claim the credit on Schedule 2 for taxes paid to NY.
If you are married filing jointly and only one spouse works in New York, both spouses still report all combined income on the CT-1040. The NY IT-203 covers only the income of the spouse who earned wages in New York.
Both returns are due by April 15 following the end of the tax year. Filing an extension with one state does not automatically extend the other. Submit Form CT-1040 EXT to Connecticut and request a federal extension, which New York honors, if you need more time.
Resident Credit
How Does the CT Resident Credit Prevent Double Taxation?
Connecticut taxes its residents on all worldwide income. New York taxes nonresidents on income earned within the state. Without a credit, you would pay both states' full tax on your NY wages. Connecticut's Schedule 2 credit eliminates this overlap.
The credit equals the lesser of:
- The income tax you actually paid to New York on your NY-source income, or
- The Connecticut tax attributable to that same income
Connecticut calculates the credit using a ratio: divide your non-Connecticut income (the NY-source portion) by your total Connecticut adjusted gross income, then multiply by your Connecticut tax liability. Compare that result to the actual tax paid to New York. The smaller number is your credit.
If New York's tax on your income exceeds what Connecticut would charge on the same amount, the credit covers the full CT portion, and your total state tax equals the NY amount. If Connecticut's tax is higher, the credit covers only the NY tax paid, and you owe the difference to Connecticut. Either way, your total state tax equals the higher of the two states' rates on that income, not the sum of both.
You must attach a copy of your completed New York return to your CT-1040 when claiming the Schedule 2 credit. The Connecticut Department of Revenue Services may disallow the credit without this attachment.
Employer Withholding
How Should My NY Employer Handle Withholding?
Your New York employer withholds New York state income tax from your wages. This is required for all employees performing services in New York, regardless of where they live. The employer does not withhold Connecticut tax.
Because only NY tax is withheld, you may owe Connecticut a balance at filing time. The CT credit offsets some of your CT liability, but if CT's effective rate on a portion of your income exceeds NY's rate, you owe the difference to Connecticut. To avoid a large bill in April:
- Make quarterly estimated tax payments to Connecticut using Form CT-1040ES if you expect to owe more than $1,000 in CT tax after credits and withholding.
- Estimated payments are due April 15, June 15, September 15, and January 15 of the following year.
- If you have a second job in Connecticut, that employer can withhold additional CT state tax to help cover the gap.
Review your withholding balance annually. Changes in income, filing status, or tax rate adjustments can shift how much you owe each state.
Remote Work
What Happens If I Work Remotely from Connecticut for a NY Employer?
New York applies a convenience of the employer rule. Under this rule, a nonresident who telecommutes from outside New York is treated as working at the employer's NY office unless the remote arrangement is required by the employer as a business necessity. If you live in CT and work from home for your own convenience, New York still counts those days as NY-source income.
The New York Tax Appeals Tribunal upheld this rule in a 2025 decision. The Tribunal confirmed that telecommuting days could not be excluded from NY-source income when the employer did not require the remote arrangement as a business necessity. The burden of proof falls on the employee to show that a bona fide employer office exists outside New York and that working there serves the employer's needs, not just the employee's preference.
Connecticut does not apply a convenience rule. From the CT side, all your income is taxable as a resident regardless of where you earned it. The practical effect for most CT residents commuting to NY: the convenience rule increases your NY tax and your NY credit on CT Schedule 2 proportionally. Your total state tax burden usually stays the same, because the additional NY tax simply displaces what you would have owed to Connecticut on those same dollars.
Worked Example: CT Resident Earning $90,000 in NY
| Line item | Amount |
|---|---|
| Taxable income (all NY-source) | $90,000 |
| NY nonresident tax (IT-203) | $4,832 |
| CT resident tax (CT-1040) | $4,200 |
| CT Schedule 2 credit (lesser of NY or CT tax) | $4,200 |
| CT balance due after credit | $0 |
| Total state income tax | $4,832 |
Single filer, all wages from NY employer, using 2025 rate brackets
Mid-Year Move
What If I Moved Between New York and Connecticut During the Year?
If you changed your permanent residence during the year, file as a part-year resident in each state. In Connecticut, Form CT-1040NR/PY covers both part-year resident and nonresident scenarios. In New York, Form IT-203 handles both nonresident and part-year resident filings.
During the months you lived in New York, NY taxes you as a resident on all income from every source. During the months you lived in Connecticut, CT taxes you as a resident on all income, and NY taxes you only on NY-source income. The credit mechanism still applies to the overlapping period where both states claim the same income.
Keep your exact move date documented. Both states require you to identify the date your residency changed. Utility records, lease agreements, and driver's license changes can all serve as evidence of when you established or ended residency in each state.
Withholding Errors
What If My Employer Withheld for the Wrong State?
If your NY employer mistakenly withheld Connecticut tax instead of New York tax, you will owe New York when you file. Submit IT-203 to report your NY income and pay the balance due. Claim the incorrectly withheld CT amount as a payment on your CT-1040, and Connecticut will refund the overpayment.
More commonly, only NY tax is withheld, which is the correct setup. File both returns as described above and claim the CT credit for NY taxes paid. If you owe CT a balance after applying the credit, pay it with your CT-1040 filing or set up estimated payments going forward to avoid underpayment penalties. Connecticut charges a late payment penalty of 10% of the tax due.
Local Taxes
Do Local Income Taxes Apply in the NY-CT Corridor?
Connecticut has no local or municipal income tax. Your CT obligation consists solely of the state's graduated income tax, with rates from 2% to 6.99% depending on your filing status and taxable income.
New York City imposes its own local income tax, but this tax applies only to NYC residents. Since you live in Connecticut, you do not owe NYC income tax even if your office is in Manhattan. Yonkers has a separate resident surcharge that applies only to Yonkers residents. Check the NYC Department of Finance for current city tax rates.
For CT residents commuting anywhere in New York State, including the five boroughs, the only New York obligation is the state-level income tax on NY-source earnings. This makes the CT-to-NY corridor simpler than some other cross-border situations where nonresident local taxes apply, such as the NJ-PA crossing with Pennsylvania's local earned income tax on nonresidents.
Questions
Work in New York, Live in Connecticut: How Taxes Work FAQ
Do Connecticut and New York have a tax reciprocity agreement?
No. Connecticut and New York have never signed a reciprocity agreement. Neither state has reciprocity with any neighbor. You must file a nonresident return in New York (IT-203) and a resident return in Connecticut (CT-1040) each year. Connecticut provides a credit on Schedule 2 for income taxes paid to New York, which prevents double taxation on the same wages.
Which state return do I file first?
File the New York nonresident return (IT-203) first. You need the final NY tax amount to calculate the credit on your Connecticut return. On CT-1040, you report all income and then claim a credit on Schedule 2 equal to the lesser of the NY tax paid or the CT tax on that income.
Can I get a refund from Connecticut if my NY tax exceeds my CT tax?
No direct refund results from the credit itself. If your NY tax exceeds your CT tax on the same income, the credit eliminates your CT liability on that income. You pay the NY amount and owe nothing further to Connecticut on those wages. The excess NY tax is not refunded through the CT credit. You pay whichever state charges more.
Does my NY employer need to withhold Connecticut tax?
No. New York law requires employers to withhold NY state income tax from wages earned in New York. Your employer is generally not required to also withhold Connecticut tax. You may need to make quarterly estimated payments to Connecticut using Form CT-1040ES if you expect to owe CT more than $1,000 after applying the credit for NY taxes paid.
What is New York's convenience of the employer rule?
New York treats remote workdays as NY-source income unless the telecommuting arrangement is a necessity for the employer. If you work from your CT home for personal convenience, NY may still tax those days. The Tax Appeals Tribunal upheld this rule in 2025. To exclude remote days from NY income, your employer must show a business necessity for the out-of-state arrangement.
Do I owe New York City tax if I work in Manhattan but live in CT?
No. New York City income tax applies only to NYC residents. As a Connecticut resident, you do not owe NYC income tax even if your office is in Manhattan, Brooklyn, or any other borough. The only New York tax you owe is the state income tax on wages earned in New York, reported on Form IT-203.
What form do I use for the Connecticut credit?
Use Schedule 2 of Form CT-1040. Enter the income taxed by New York and the tax paid to NY. The credit equals the lesser of the actual NY tax paid or the CT tax attributable to that income. Attach a copy of your completed New York return (IT-203) to support the credit claim. The Connecticut DRS may disallow the credit without this attachment.
- Sources: Connecticut DRS: Nonresidents Who Work in Connecticut · New York DTF: 2025 IT-203 Instructions · Connecticut DRS: Special Notice 92-2, Credit for Taxes Paid · New York DTF: IT-112-R Resident Credit Instructions · Connecticut General Assembly OLR: Income Tax Rates and Brackets Since 1991 · Connecticut DRS: Nonresident and Part-Year Resident Tax Information
- Last updated September 10, 2026
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