Connecticut taxes for W-2 employees: Paid Leave, state credits, and working in New York

Connecticut taxes residents on all their wages, wherever the work is done, starting from the federal adjusted gross income (AGI) on your Form 1040. For employees in Fairfield County, the practical questions are what Connecticut takes from each paycheck, which federal breaks it ignores, and how a New York job is taxed.

How Connecticut taxes wages

Connecticut taxes wages at graduated rates from 2% to 6.99%, starting from federal AGI. There's no standard deduction and no itemized deductions, so mortgage interest, charitable gifts, and property taxes don't reduce Connecticut taxable income.

The brackets aren't indexed for inflation, so the same figures apply in 2027 unless lawmakers change them. A personal exemption of $15,000 for single filers and $24,000 for joint filers, along with a personal tax credit, helps lower incomes, but both disappear as income rises. The exemption is gone above $44,000 of Connecticut AGI for single filers ($71,000 joint). Two add-backs then reclaim the benefit of the lower brackets. The 2% phase-out adds up to $250 for single filers and $500 for joint filers, and tax recapture adds up to $3,400 and $6,800, respectively.

Because Connecticut starts from federal AGI, anything that lowers your W-2 taxable wages also lowers Connecticut tax: pre-tax 401(k) deferrals, payroll HSA contributions, FSAs, and commuter benefits.

Connecticut withholding

Give your employer Form CT-W4. Without one, the employer must withhold at a flat 6.99% with no exemption. Connecticut has no flat supplemental rate, so for bonuses and RSU vests the employer computes withholding on the extra pay combined with regular wages.

The CT Paid Leave deduction on your pay stub

This line is a 0.5% employee contribution that funds Connecticut's paid family and medical leave program. It applies to wages up to the Social Security wage base, which is $184,500 in 2026 and $192,300 in 2027, so the maximum contribution is $922.50 and $961.50, respectively. The program's board has kept the rate at 0.5% for 2027.

• You can't opt out if you work for a covered employer, which includes nearly every private employer with Connecticut employees. If two employers each deduct up to the cap, you can ask the CT Paid Leave Authority to refund the excess after year-end.
• The contribution comes out of after-tax pay. Under IRS Revenue Ruling 2025-4, mandatory employee contributions to a state paid leave program are state income tax, deductible only if you itemize and only within the SALT cap.
• The same ruling holds that family leave benefits are federally taxable, while medical leave benefits attributable to your own contributions are not.
• Only people who work in Connecticut participate. If you live here but work in another state, that state's program may cover you instead.

Connecticut tax breaks for employees

The main breaks are the CHET 529 subtraction, the property tax credit, and the refundable Connecticut earned income tax credit. Two more arrive with 2027 returns.

• CHET 529 contributions made during the year to Connecticut Higher Education Trust accounts reduce Connecticut AGI by up to $5,000 ($10,000 joint), counting all your CHET accounts together. Excess contributions carry forward five years, and there is no federal deduction.
• The property tax credit is worth up to $300 per return for property tax paid on your primary residence, your car, or both, with one vehicle allowed for single filers and two on a joint return. It is available in full up to $49,500 of Connecticut AGI ($70,500 joint) and is gone above $109,500 ($130,500 joint).
• Connecticut's EITC equals 40% of your federal earned income credit, plus $250 if you have at least one qualifying child, and it is refundable.
• A family caregiver credit begins with 2027 returns. This nonrefundable credit equals 50% of eligible expenses for caring for a family member, up to $2,000, if federal AGI is under $50,000 ($100,000 joint). DRS will issue it by voucher, first come, first served, with a $1.8 million annual cap.
• First-time homebuyer savings accounts can be opened and funded starting in 2026. If your federal AGI is under $125,000 ($250,000 joint), your 2027 return subtracts deposits made in 2026 and 2027, up to $2,500 a year ($5,000 joint), and interest earned in the account is exempt from Connecticut tax starting in 2027.

The new federal deductions don't lower Connecticut tax

Connecticut's return starts from federal AGI, while the federal deductions for overtime, tips, car-loan interest, and the $6,000 senior deduction are taken on Schedule 1-A, after AGI. As of November 2026, Connecticut hasn't enacted matching subtractions, so that income stays fully taxable on your Connecticut return. See our guide to the new deductions.

Key numbers: rates 2%–6.99% · CT Paid Leave 0.5% of wages up to $184,500 (max $922.50, or $961.50 in 2027) · CHET subtraction $5,000 / $10,000 · property tax credit up to $300 · CT EITC 40% of federal + $250 with a child · 60% credit after a successful convenience-rule challenge.

How Fairfield County residents who work in New York are taxed

You file a New York nonresident return (Form IT-203) and pay New York tax on your New York-source wages, then claim Connecticut's credit for that tax on Schedule 2 of Form CT-1040. The credit can't exceed the Connecticut tax on the same income, so on New York wages you effectively pay whichever state's tax is higher.

New York figures your tax as if you were a resident on all your income, then multiplies it by your income percentage, which is New York-source income divided by total income. Nonresidents don't pay New York City's income tax.

Home workdays and the convenience rule

Work-from-home days usually count as New York days. Under New York's convenience-of-the-employer rule, if your assigned or primary office is in New York, normal workdays at your Connecticut home count as New York days unless your employer has established a bona fide employer office there. Establishing one means meeting New York's factor test in TSB-M-06(5)I. New York courts have continued to uphold the rule, most recently in a July 2, 2026 appellate decision. Connecticut's credit covers the New York tax on those days, because DRS treats wages earned at a Connecticut home office for an employer in a convenience-rule state as income from that state.

Connecticut's new 60% credit

The credit softens the Connecticut cost of winning a case against the convenience rule. Under Public Act 25-172, if you paid the other state's tax, were denied a refund, appealed to a court or tribunal, and won a final decision refunding tax on income from days you worked in Connecticut, your Connecticut credit shrinks and your Connecticut tax rises. The new credit equals 60% of that increase for tax years from 2020 on, and Connecticut also waives penalties and interest on the resulting late payment.

Employer withholding for commuters

An employer that does business in both states generally withholds Connecticut tax only to the extent it exceeds the New York tax. If the employer has no Connecticut office or business, it doesn't have to withhold Connecticut tax at all. As a result, Connecticut tax on investment income or a spouse's pay can leave a balance due. Estimated payments are generally required when Connecticut tax after withholding is $1,000 or more, and the last 2026 installment is due January 15, 2027.

Worked example: a Stamford renter with a Manhattan job

Maya, a hypothetical single renter in Stamford, earns $180,000 in 2026 from an employer whose only office is in Manhattan, plus $6,000 of interest and dividends, for federal AGI of $186,000. Of her 230 workdays, 138 are in the Manhattan office and 92 at home in Stamford, and she takes New York's $8,000 standard deduction.

• Connecticut tax before the credit comes to $10,410: $4,750 on the first $100,000, plus 6% of the next $86,000 ($5,160), plus the $250 phase-out add-back and $250 of recapture.
• New York tax before the income percentage is $10,502. Taxable income is $178,000, and because New York AGI is above $157,650, New York's 2026 worksheet taxes it at a flat 5.9%.

The example illustrates three points.

• Under the convenience rule, about $4,000 of tax moves from Connecticut to New York, but Maya's total rises by only $36, because New York's rate on her income is only slightly higher than Connecticut's.
• The $336 left for Connecticut is its tax on her interest and dividends, the part of her income New York doesn't tax. Because that amount is under $1,000, she needs no Connecticut estimated payments.
• If she won a convenience-rule case for 2026, New York would refund $4,066 and her Connecticut tax would rise by $4,030. The 60% credit of $2,418 would cut that increase to $1,612, leaving her $2,454 ahead before legal costs.

Common mistakes

1. Using the New York tax withheld on your W-2 as "tax paid" on Schedule 2. Connecticut wants the liability from your completed New York return.
2. Allocating home days to Connecticut on Form IT-203 when your home office isn't a bona fide employer office. New York counts them as New York days.
3. Keeping an apartment in New York. If you maintain a permanent place of abode there for substantially all of the year and spend 184 days or more in the state, New York taxes you as a resident on all your income. Any part of a day in the state counts as a day.
4. Expecting the federal overtime, tip, or car-loan deductions to carry over to Connecticut.
5. Skipping Form CT-W4, which leaves Connecticut tax withheld at a flat 6.99%.
6. Contributing to CHET in early 2027 and expecting a 2026 subtraction. Only contributions made during the year count.

How Summer Associates helps

Summer Associates, based in Stamford, prepares Connecticut and New York nonresident returns for commuters, checks your workday allocation and the Schedule 2 credit, and reviews CT-W4 and New York withholding before bonuses and RSU vests.

This guide is general education based on federal and Connecticut law as of 2026-11-15. State rules differ and facts matter. Before acting, get advice for your situation from Summer Associates or another qualified advisor.