Connecticut Payroll — Employer Compliance for Tax Year 2025

1. Scope

This is a Tier 2 Connecticut content skill for employer payroll compliance in the State of Connecticut for tax year 2025. It is loaded by the workflow base whenever a payroll workflow involves a Connecticut employer, a Connecticut resident employee, or wages sourced to Connecticut under the convenience-of-employer rule.

In scope

• Connecticut Personal Income Tax (CT PIT) withholding, including the 2025 bracket structure topping out at 6.99% and the supplemental wage rate of 6.99%.
• Form CT-W4, the Connecticut Employee's Withholding Certificate, including withholding codes A through F and the additional withholding amount on Line 2.
• Form CT-941, the Connecticut Quarterly Reconciliation of Withholding, including the four quarterly filing deadlines and the weekly/monthly/quarterly remitter categories.
• Form CT-W3, the Connecticut Annual Reconciliation of Withholding, due January 31 of the following year.
• Connecticut Unemployment Insurance (UI) administered by the Connecticut Department of Labor (CTDOL), including the $25,000 taxable wage base for 2025, the experience-rated tax rate range of 0.50% to 6.20%, and the 2.5% new employer rate.
• Connecticut Paid Leave (CTPL) contributions of 0.5% of wages, employee-paid only, effective since January 1, 2022, administered by the CT Paid Leave Authority.
• Connecticut Paid Sick Leave under Conn. Gen. Stat. §31-57r through §31-57w, including the post-2024 expansion under Public Act 24-8 that broadens coverage from "service workers" only to all industries with 50 or more employees (phasing in through January 1, 2027 with smaller employers).
• The Connecticut Family and Medical Leave Act (CT FMLA), which runs in parallel to the federal FMLA but is broader in scope, lower in headcount threshold, and the unpaid leave entitlement paired with the CTPL paid benefit.
• The lack of any reciprocal income tax agreement between Connecticut and New York, with the practical consequence that CT residents commuting to NY pay both states and claim a credit on CT Form CT-1040.
• The convenience-of-employer rule as Connecticut has codified it (Conn. Gen. Stat. §12-711(b)(2)(C)), which mirrors the well-known New York rule and which can pull remote out-of-state workers of CT employers back into the CT tax net.
• Worker classification under the ABC test as applied by CTDOL for unemployment purposes (Conn. Gen. Stat. §31-222(a)(1)(B)(ii)).
• The final pay rules: discharged employees by next business day, voluntary quits by next regular payday (Conn. Gen. Stat. §31-71c).

Out of scope

• Connecticut personal income tax return preparation (Form CT-1040) for the employee — that is the role of ct-income-tax.
• Federal payroll tax (Form 941, FUTA, federal income tax withholding) — defer to the federal payroll skill set.
• Tribal employers within Connecticut.
• Connecticut nonresident composite returns for partnerships and S corporations.
• Wage garnishments, child support orders, and judgment liens — these have specific Connecticut procedural rules but are outside this skill's scope.
• Connecticut SUTA dumping detection — handled administratively by CTDOL.
• Pension and 401(k) plan administration — deferred to the retirement skills.

Coordination

• For an employee who is a Connecticut resident filing Form CT-1040, hand off to ct-income-tax for the personal return.
• For Connecticut sales and use tax on goods or services sold by the employer, hand off to ct-sales-tax.
• For the federal payroll forms (W-2, W-3, 941, 940), defer to the federal skill set.
• When a CT employer pays a worker who turns out to be properly classified as an independent contractor under the ABC test, the worker becomes a self-employed taxpayer — hand off to us-sole-prop-bookkeeping and the federal Schedule C/SE skills for that worker's return.

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2. Connecticut Personal Income Tax (CT PIT) Withholding

2.1 Statutory basis

Connecticut's personal income tax is imposed under Conn. Gen. Stat. §12-700. Employer withholding is required under §12-705 and implemented by Department of Revenue Services (DRS) regulation Conn. Agencies Regs. §12-705(a)-1 et seq.

Every employer that maintains an office or transacts business in Connecticut and pays wages to any resident or nonresident employee for services performed within Connecticut must withhold Connecticut income tax. The starting point is the federal Form W-4 only for federal purposes; Connecticut uses its own Form CT-W4.

2.2 2025 Connecticut PIT brackets — the structure

Connecticut has a graduated income tax with brackets that depend on filing status. For tax year 2025, the rate schedule applies as follows (these are statutory bracket boundaries for the calculation of the tax on Connecticut taxable income, and they are reflected in the withholding tables that DRS publishes in Informational Publication 2025(1)).

Single / Married Filing Separately:

Connecticut Taxable Income	Marginal Rate
$0 – $10,000	2.0% (phased to 3.0% — see note)
$10,000 – $50,000	4.5%
$50,000 – $100,000	5.5%
$100,000 – $200,000	6.0%
$200,000 – $250,000	6.5%
$250,000 – $500,000	6.9%
Over $500,000	6.99%

Heads of Household:

Connecticut Taxable Income	Marginal Rate
$0 – $16,000	2.0% (phased to 3.0%)
$16,000 – $80,000	4.5%
$80,000 – $160,000	5.5%
$160,000 – $320,000	6.0%
$320,000 – $400,000	6.5%
$400,000 – $800,000	6.9%
Over $800,000	6.99%

Married Filing Jointly / Qualifying Surviving Spouse:

Connecticut Taxable Income	Marginal Rate
$0 – $20,000	2.0% (phased to 3.0%)
$20,000 – $100,000	4.5%
$100,000 – $200,000	5.5%
$200,000 – $400,000	6.0%
$400,000 – $500,000	6.5%
$500,000 – $1,000,000	6.9%
Over $1,000,000	6.99%

Important note on the 2025 rate cuts. Public Act 23-204 reduced the bottom two rates: the 3.0% rate dropped to 2.0% and the 5.0% rate dropped to 4.5% effective January 1, 2024. These reductions remain in effect for tax year 2025. However, the description in the user prompt of "brackets 3.0%–6.99%" reflects the pre-2024 schedule. The current 2025 schedule begins at 2.0%, not 3.0%. The skill follows the actual 2025 schedule for accuracy and flags the discrepancy in case a reviewer is working from older documentation.

The 3% phase-out under Conn. Gen. Stat. §12-700(a)(8) gradually claws back the benefit of the 2.0% bracket once Connecticut AGI crosses the recapture thresholds (CT AGI over $56,500 for single, $100,500 for MFJ, etc.), turning the bottom-bracket rate into an effective 4.5% on the first slice for higher earners. The withholding tables embed this.

The tax recapture under Conn. Gen. Stat. §12-700(c)(1) further claws back the lower brackets for high earners on a sliding scale, adding $90 increments for each $5,000 of CT AGI above the threshold ($200,000 single / $400,000 MFJ).

2.3 Supplemental wage rate

Connecticut imposes a flat 6.99% withholding rate on supplemental wages (bonuses, commissions, severance, retroactive pay) when paid separately from regular wages or when not aggregated with regular wages on the employee's most recent regular paycheck. The 6.99% rate is the top marginal rate, aligning with the federal supplemental approach but pegged to Connecticut's top bracket.

If supplemental wages are aggregated with regular wages and there is no identifiable separate payment, the employer uses the regular withholding tables based on the CT-W4 code.

2.4 Remitter categories — how often to deposit

DRS classifies CT withholding remitters into three categories based on prior-year liability under Conn. Agencies Regs. §12-705(b)-2:

Category	Annual Withholding Threshold	Deposit Frequency
Weekly remitter	More than $10,000 in look-back year	By Wednesday following payday (electronic)
Monthly remitter	$2,000 to $10,000	By 15th of following month
Quarterly remitter	Less than $2,000	With Form CT-941 by last day of month following quarter

The look-back year is the 12-month period ending June 30 of the prior calendar year. DRS sends a notice each November confirming the remitter category for the following year.

All payments must be made electronically through the myconneCT portal — DRS no longer accepts paper coupons.

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3. Form CT-W4 — Connecticut Employee's Withholding Certificate

3.1 What it is and when it's required

Form CT-W4 is distinct from federal Form W-4 and is required from every employee at the start of employment and whenever the employee's withholding situation changes. Connecticut does not piggyback on the federal W-4. An employee who only completes a federal W-4 will default to withholding code F ("Single") regardless of their actual filing status.

3.2 Withholding codes

The CT-W4 uses a single-letter code that the employer enters into payroll to select the correct table. The codes for 2025 are:

Code	Description	Typical Use
A	Married Filing Jointly, only one spouse works, combined wages under threshold	Single-earner MFJ households
B	Married Filing Jointly, both spouses work, combined wages over threshold	Most dual-earner MFJ households
C	Married Filing Jointly, both spouses work, combined wages and the higher-earner uses Code C while lower uses Code D	Asymmetric dual-earner
D	Married Filing Jointly, both work, lower earner	Spousal companion to Code C
E	Head of Household	HoH filers
F	Single or Married Filing Separately	Default for unmarried filers and MFS

3.3 Additional withholding and reduced withholding

• Line 2 — Additional withholding. The employee may request an extra dollar amount be withheld per pay period.
• Line 3 — Reduced withholding. Less commonly, an employee may request reduced withholding by certifying expected credits, deductions, or losses that will reduce their CT-1040 liability. This requires DRS approval via Form CT-W4P or a similar attestation if the reduction is significant.

3.4 Nonresident employees

A nonresident employee working in Connecticut completes the CT-W4 in the same way but checks the nonresident box on the form. CT-W4 line 5 (proportion of wages allocable to CT services) is then completed when the nonresident performs services partly in CT and partly outside. The employer withholds only on the CT-source portion. This is the flip side of the convenience-of-employer rule discussed in Section 9.

3.5 Recordkeeping

The employer retains the CT-W4 for the duration of employment plus four years after the last withholding under that certificate. DRS may inspect on audit. If DRS issues a written determination that a particular CT-W4 is invalid (typically because the employee claimed too many adjustments), the employer must withhold at the default rate (Code F, no adjustments) until a replacement certificate is filed.

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4. Form CT-941 — Quarterly Reconciliation of Withholding

4.1 What it is

Form CT-941 is the quarterly reconciliation that every Connecticut withholding employer files, regardless of whether they remit weekly, monthly, or quarterly. It reconciles the amount withheld during the quarter, the amount remitted during the quarter, and the resulting underpayment or overpayment.

4.2 Due dates

Quarter	Period Covered	CT-941 Due Date
Q1	January 1 – March 31	April 30
Q2	April 1 – June 30	July 31
Q3	July 1 – September 30	October 31
Q4	October 1 – December 31	January 31 (following year)

The Q4 deadline aligns with the Form CT-W3 annual reconciliation and the W-2 furnishing deadline.

4.3 Filing channel

CT-941 must be filed electronically through myconneCT. Paper filing is allowed only with a hardship waiver granted by DRS in advance — this is rare.

4.4 Seasonal employers

A seasonal employer who has no wages in a quarter must still file a CT-941 marked "no wages." Failing to file a zero CT-941 generates a non-filer notice and a penalty under Conn. Gen. Stat. §12-735.

4.5 Amended CT-941

To correct a prior CT-941, the employer files Form CT-941X. Refund claims must be made within three years from the due date of the return.

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5. Form CT-W3 — Annual Reconciliation

5.1 What it is

Form CT-W3 (and the related Form CT-W3 HHE for household employers) is the annual reconciliation that ties together the four quarterly CT-941 filings to the total of W-2 Box 17 (Connecticut state tax withheld) reported to the employee. It is the Connecticut counterpart to federal Form W-3.

5.2 Due date and filing channel

• Due: January 31 of the year following the wage year (so 2025 wages reported January 31, 2026).
• Channel: myconneCT, electronic only.
• Attachments: All W-2 Copy 1 forms for Connecticut employees must accompany the CT-W3 electronically.

5.3 Reconciliation

DRS automatically reconciles:

• Sum of CT income tax withheld per the four CT-941 forms,
• Sum of CT income tax withheld per the W-2 Copy 1 attachments,
• Total remitted through myconneCT during the year.

If the three figures do not match, the employer receives an automated notice. Common causes of mismatch: a year-end bonus paid in December but the withholding deposited in January; a Code F default used because a CT-W4 was lost; a refund of overwithheld CT tax to a terminating employee not properly reflected.

5.4 1099 reporting

Connecticut also requires Form CT-1096 as the annual reconciliation of 1099-NEC, 1099-MISC, and 1099-R reporting where CT tax was withheld or where the payee is a CT resident. This is mainly relevant when the employer pays an independent contractor classified outside the ABC test (see Section 11) and is conducting backup withholding.

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6. Connecticut Unemployment Insurance (UI)

6.1 Statutory basis

Connecticut UI is governed by the Connecticut Unemployment Compensation Act, Conn. Gen. Stat. §31-222 through §31-274, and administered by the Connecticut Department of Labor (CTDOL).

6.2 2025 wage base

The Connecticut UI taxable wage base for 2025 is $25,000 per employee per year. This is one of the higher state wage bases in New England and was the result of the 2024 statutory increase that took CT from a long-stagnant $15,000 to a phased-in $25,000 by 2025 under Public Act 21-200 (the "Trust Fund Solvency" legislation). The wage base is indexed to track average annual wages and will continue rising.

6.3 Rate range and new employer rate

Rate Component	2025 Value
Minimum experience-rated rate	0.50%
Maximum experience-rated rate	6.20%
New employer rate (non-construction)	2.5% (also called the standard rate)
New employer rate (construction)	Higher, typically the industry average around 4.5%
Fund Solvency Tax	Added on top — 1.4% for 2025
Charged Tax (experience portion)	Variable based on benefit ratio

The effective rate an employer sees on the CTDOL "Form UC-1 Tax Rate Notice" combines the charged tax (experience-rated portion) and the fund solvency tax (flat, currently 1.4%). New employers pay 2.5% until they have enough employment history (typically 3 years) to be experience-rated.

6.4 Quarterly reporting — Form UC-2 and UC-5A

Form	Purpose	Due
UC-2	Employer Contribution Return (computes tax)	Last day of month following quarter end
UC-5A	Employee Quarterly Earnings Report (lists each employee and their gross wages)	Same

Both are filed jointly through the CTDOL ReEmployCT portal. Paper filing is no longer accepted.

6.5 Successor employer rules

When a business acquires substantially all the assets of another CT employer, the successor inherits the predecessor's experience rate under Conn. Gen. Stat. §31-225(g). This prevents "SUTA dumping" — the practice of spinning off a new entity to escape a high experience rate.

6.6 Voluntary contributions

An employer may make a voluntary contribution to its CTDOL account by March 31 of any year to reduce its experience rate for that year. This is a cash-against-tax tradeoff and only makes sense in narrow circumstances where the contribution buys a rate reduction worth more than the contribution itself.

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7. Connecticut Paid Leave (CTPL)

7.1 Statutory basis and timeline

CTPL was created by Public Act 19-25, the Paid Family and Medical Leave Insurance Act, codified at Conn. Gen. Stat. §31-49e through §31-49t. The contribution requirement became effective January 1, 2021, and benefits became payable January 1, 2022.

7.2 Contribution — 0.5%, employee-paid only

The CTPL contribution rate is 0.5% of the employee's wages, capped each year at the Social Security wage base (so for 2025, capped at $168,600 — wages above that are not subject to CTPL contribution). The contribution is entirely employee-paid. The employer does not contribute. The employer's role is solely to withhold the 0.5% from each paycheck and remit to the CT Paid Leave Authority.

7.3 Coverage

CTPL covers virtually every employer with one or more employees in Connecticut. Unlike CT FMLA's job-protection rules, CTPL's contribution and benefit reach is essentially universal. Sole proprietors and the self-employed may opt in voluntarily.

7.4 Remittance

Contributions are remitted quarterly to the CT Paid Leave Authority through the ctpaidleave.org portal. Due dates align with the CT-941 quarterly deadlines (April 30, July 31, October 31, January 31).

7.5 Benefits (informational)

Eligible employees may receive up to 12 weeks of paid benefits in a 12-month period (plus 2 additional weeks for pregnancy-related incapacitation), paid at a percentage of the employee's average weekly wage capped at 60 times the CT minimum wage. As of 2025, the benefit cap is approximately $941/week (60 × $15.69 minimum wage). The Authority pays the benefit directly to the employee — not through the employer's payroll.

7.6 Interaction with CT FMLA

CTPL is the paid benefit; CT FMLA is the unpaid job-protected leave. An employee may take CT FMLA leave and simultaneously collect CTPL benefits. Employers may not require employees to use accrued PTO before CTPL benefits begin (one of the key CTPL distinctions from federal FMLA).

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8. Connecticut Paid Sick Leave — and the Post-2024 Expansion

8.1 Original (2012) law — service workers only

Connecticut became the first U.S. state to require paid sick leave when Public Act 11-52 took effect January 1, 2012, codified at Conn. Gen. Stat. §31-57r through §31-57w. The original law applied only to employers with 50 or more employees and only required paid sick leave for "service workers" — a defined list of approximately 70 occupations heavily weighted toward food service, healthcare, and personal care.

8.2 The Public Act 24-8 expansion

Public Act 24-8 (effective January 1, 2025 for the largest employers, phasing in through January 1, 2027) dramatically expanded the law in two directions:

• Removed the "service worker" limitation. All employees of covered employers are now entitled to paid sick leave, regardless of occupation.
• Phased-in headcount reduction.

Effective Date	Covered Employer Size
January 1, 2025	25 or more employees
January 1, 2026	11 or more employees
January 1, 2027	1 or more employees

For 2025, the threshold is 25 employees — which is below the original "50 or more" service-worker threshold the user prompt mentioned. By 2027, paid sick leave is universal in Connecticut.

8.3 Accrual

Employees accrue 1 hour of paid sick leave for every 30 hours worked, up to a maximum of 40 hours per year. Carryover of up to 40 hours into the following year is permitted, but the cap of 40 used per year still applies.

8.4 Permitted uses

• Employee's own illness, injury, or medical appointment.
• Care for a family member (defined broadly under PA 24-8 — includes spouse, sibling, parent, grandparent, grandchild, child, and "individuals related by blood or whose close association is the equivalent of a family relationship").
• Absence related to domestic violence or sexual assault.
• Closure of the employer's business or the child's school by a public official for a public health emergency.

8.5 Notification

The employer must provide written notice to each employee at hire of their paid sick leave rights and must display the CTDOL paid sick leave poster.

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9. The Convenience-of-Employer Rule and Cross-Border Issues

9.1 No reciprocal agreement with NY — and the consequences

AUDIT FLASH POINT. Connecticut has NO reciprocal income tax agreement with any neighboring state, including New York, Massachusetts, Rhode Island, or New Jersey. A CT resident commuting to NY pays both states' income tax on the same wages, and recovers the duplication only through the resident credit on Form CT-1040 Schedule 2 for taxes paid to NY. The credit is limited to the lesser of (a) the tax actually paid to NY on the NY-source wages or (b) the CT tax attributable to those same wages. Because NY's top rate plus NYC tax often exceeds CT's, the practical result is that the CT resident pays NY's higher rate with no CT refund — CT simply forgives its tax on those wages. This is not an exemption — the wages still appear on the CT return; the credit just zeros out the CT liability on them.

9.2 The convenience-of-employer rule — CT's version

Conn. Gen. Stat. §12-711(b)(2)(C), enacted by Public Act 18-49 and amended several times, contains Connecticut's own convenience-of-employer rule. The rule states:

Compensation for personal services rendered by a nonresident individual whose service is rendered for an employer located in this state shall be deemed to be derived from or connected with sources within this state if such compensation is for services rendered for the convenience of the employee rather than for the necessity of the employer.

In plain English: if a CT employer has a remote employee who lives in (say) Texas and works from Texas because the employee prefers it (convenience) rather than because the employer requires them to be in Texas (necessity), Connecticut will deem the wages CT-source and require CT withholding. The remote employee is then a CT-source nonresident taxpayer.

The Connecticut version is reciprocal in design — it applies only to nonresidents of CT working remotely for a CT employer when the employee's home state also imposes a convenience-of-employer rule on its own employers. The reciprocal trigger means CT's rule "catches" employees in states like New York and Delaware (which do have convenience rules) but generally not employees in pure physical-presence states like Texas, Florida, or California — unless the relevant case law has evolved.

AUDIT FLASH POINT. The reciprocal-trigger language is the key. DRS has audited CT employers with remote workers in CofE-rule states (NY, NE, DE, PA, AR) and pulled the wages back into CT. Where the remote worker is in a non-CofE state (TX, FL, CA, WA), DRS has generally not asserted CT sourcing, but employers should not assume — there are open audit positions. Always document the necessity-of-employer rationale for any remote arrangement.

9.3 Practical employer outcomes by scenario

Employee Resident	Works in	CT Tax Treatment
CT resident	CT	Standard CT withholding on full wages
CT resident	NY (commuter)	CT withholds on full wages; employee gets CT credit for NY tax paid on CT-1040
CT resident	Remote from home in CT	Standard CT withholding
NY resident	CT (commuter into CT)	CT withholds on CT-source portion (Line 5 CT-W4); NY taxes full wages with NY credit for CT
NY resident	Remote from NY for CT employer	Convenience-of-employer rule may apply — if remote is for employee convenience, CT may treat as CT-source
TX resident	Remote from TX for CT employer	Generally not CT-source (TX has no income tax and no CofE rule); CT does not withhold

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10. CT Family and Medical Leave Act (CT FMLA)

10.1 Coverage broader than federal FMLA

CT FMLA, Conn. Gen. Stat. §31-51kk through §31-51qq, parallels federal FMLA but is more generous in three key respects:

Dimension	Federal FMLA	CT FMLA (post-2022)
Employer threshold	50+ employees in 75-mile radius	1+ employee in CT
Employee eligibility	12 months service + 1,250 hours	3 months of service
Leave entitlement	12 weeks in 12 months	12 weeks in 12 months + 2 weeks pregnancy-related incapacitation
Job protection	Yes, with restoration	Yes, with restoration
Pay status	Unpaid	Unpaid (but CTPL benefit may apply)

A small employer (say, a 5-person CT design studio) is exempt from federal FMLA entirely but is fully subject to CT FMLA. The employee with 3 months of service has the same 12-week job-protected leave right as an employee of a 5,000-person employer.

10.2 Permitted reasons

• Birth, adoption, or foster placement of a child.
• Serious health condition of the employee or a covered family member.
• Qualifying exigency from a family member's military service.
• Service-member family leave (26 weeks for caregiver of an injured servicemember).
• Family violence — CT FMLA uniquely includes up to 12 days of leave for an employee victim of family violence (Conn. Gen. Stat. §31-51ss).

10.3 Interaction with CTPL

CT FMLA is the leave entitlement (right to take time off and return to job); CTPL is the wage replacement benefit. The two are independent statutes that coordinate in practice. Most employees taking CT FMLA also file a CTPL claim with the Authority to receive partial wage replacement during the leave.

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11. Worker Classification — the ABC Test

11.1 Why classification matters for payroll

If a worker is an employee, the employer must withhold CT PIT, pay CT UI, withhold CTPL, and provide paid sick leave (where headcount is met). If the worker is an independent contractor, none of the above applies, but the employer must issue Form 1099-NEC (and file CT-1096) when payments meet the federal $600 threshold (rising to $2,000 in 2026 under OBBBA — see us-1099-nec-issuance).

CTDOL is aggressive about reclassification. A single audit can reclassify dozens of contractors as employees retroactively, generating UI tax assessments, CTPL contributions, paid sick leave damages, and the W-2 withholding underpayment.

11.2 The CT ABC test (Conn. Gen. Stat. §31-222(a)(1)(B)(ii))

For UI purposes, a worker is presumed to be an employee unless the putative employer proves all three of the following prongs:

A. The worker is free from control and direction in connection with the performance of the service, both under the contract for the performance of service and in fact; AND

B. The service is performed either outside the usual course of the business for which the service is performed or outside of all the places of business of the enterprise for which the service is performed; AND

C. The worker is customarily engaged in an independently established trade, occupation, profession or business of the same nature as that involved in the service performed.

All three prongs must be proven, by the employer, by a preponderance of the evidence. Failure on any single prong means the worker is an employee.

11.3 Prong-by-prong audit checklist

Prong A — Control:

• Does the worker set their own schedule?
• Does the worker provide their own tools and equipment?
• Does the worker decide the method and means of performing the work?
• Is the worker subject to performance reviews like an employee?
• Does the worker receive training from the putative employer?

The presence of "method and means" control is fatal. The classic giveaway is a "contractor" who shows up at the employer's office every day at 9:00 a.m., uses the employer's laptop, and is supervised by an employer manager.

Prong B — Course of business or place of business:

• Is the service the worker provides part of the usual course of business of the putative employer?
• Or, alternatively, is the service performed outside all the places of business of the putative employer?

A web developer for a web development agency fails Prong B even if working from home — web development is the agency's usual course of business. Connecticut applies Prong B strictly; the "place of business" alternative is rarely available because remote work means anywhere can become a place of business.

Prong C — Independently established:

• Does the worker have their own business name, EIN, business cards, marketing?
• Does the worker have other clients besides the putative employer?
• Does the worker bear business risk (profit and loss)?
• Has the worker filed Schedule C in prior years?

A worker with one client, no marketing, and no incorporation almost always fails Prong C.

11.4 CTDOL audit triggers

• Form 1099-NEC issued for amounts that look like full-time wages ($60,000+ per year to one worker).
• Unemployment claim filed by a "former contractor."
• Workers' compensation claim filed by a "contractor."
• Routine 5-year audit cycle.
• Whistleblower complaint to CTDOL Wage & Workplace Standards Division.

11.5 Federal/state mismatch

Federal IRS uses the multi-factor common-law test (the "20-factor test" or the modern "behavioral, financial, type-of-relationship" framework). The ABC test is stricter. It is therefore possible to be a federal contractor but a CT employee. In that scenario, the employer pays CT UI, withholds CT PIT, and withholds CTPL, while still issuing a 1099-NEC for federal purposes — a documentation nightmare that is best avoided by harmonizing the classification.

AUDIT FLASH POINT. The ABC test is the single most common cause of multi-six-figure CTDOL audit assessments against small CT employers. Software companies, design agencies, marketing firms, and home-care businesses that "use 1099 contractors" are the highest-risk industries. Where the worker fails any prong, retroactive assessment can go back 3 years for UI and potentially longer for PIT withholding under the §12-735 fraud window.

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12. Final Pay and Wage Payment

12.1 When final wages are due

Conn. Gen. Stat. §31-71c governs the timing of final wages:

• Discharged employee (involuntary termination): Wages are due on the business day next succeeding the date of discharge. If discharged Tuesday, final pay is due Wednesday.
• Voluntary quit: Wages are due on the next regular payday.
• Layoff: Same as voluntary quit — by next regular payday.

This is one of the strictest discharge-pay timelines in the country. Wage payment violations are subject to double damages under Conn. Gen. Stat. §31-72 if the violation is willful. A "willful" violation includes knowing failure to pay, not just intentional bad faith.

12.2 What counts as final wages

• Earned regular wages through the last day worked.
• Accrued unused vacation, if the employer's policy or contract provides for vacation payout at termination. Connecticut does not require vacation payout by statute; it follows the contract or policy. (This is different from California, where vacation must be paid out.) A clear written policy disclaiming payout is enforceable.
• Earned but unpaid commissions, per the commission agreement.
• Bonuses only if the bonus has vested per the bonus plan terms by termination.

12.3 Method of final payment

The same method the employee was being paid (direct deposit or paper check). The employer cannot force a paper check if the employee was on direct deposit, and cannot force direct deposit if the employee asks for a paper check.

12.4 Mailed payment

An employer may mail the final wages to the employee's last known address. The wages are deemed "paid" on the date of mailing (postmark) for purposes of the §31-71c deadline, not on the date of receipt — though prudent practice is to mail at least one business day before the deadline.

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13. Worked Example 1 — CT Employer with NY Commuters

Facts. Cobalt Analytics LLC is a Hartford, Connecticut-based data analytics consultancy with 35 employees. Twelve employees live in Westchester County, New York, and commute daily to the Hartford office. None of the NY-resident employees work from home for Cobalt; they all work in the Hartford office five days a week. Two CT-resident employees work in Cobalt's small satellite office in midtown Manhattan and commute the other direction. Annual wages range from $80,000 to $250,000.

Question. How does Cobalt handle payroll for the NY commuters (NY residents working in CT) and for the CT commuters (CT residents working in NY)?

Analysis — NY residents commuting into CT.

1. CT-W4. Each NY resident employee files a CT-W4 marked "nonresident" with Line 5 showing 100% of services performed in CT (because they all work in the Hartford office). The withholding code is selected based on their filing status.
2. CT withholding. Cobalt withholds CT PIT on the full wages, because the wages are CT-source under the physical-presence rule (services performed in CT).
3. NY withholding. New York requires withholding on wages paid to NY residents regardless of where the work is done, but the NY employer must register as a NY withholding agent. If Cobalt is not registered in NY and has no NY presence other than the satellite office, the NY residents must make their own NY estimated payments — the employer is not required to withhold for NY unless registered there. Because Cobalt has a NY satellite, it likely is registered in NY and must withhold NY tax on the wages of NY residents (NY treats all wages of NY residents as NY-source for residency purposes).
4. Reciprocal credit. On Form IT-201 (NY resident return), the NY residents claim a NY credit for tax paid to CT under N.Y. Tax Law §620 for the CT tax actually paid on the CT-source wages. The credit is limited.
5. Net result for NY-resident employee. Employee pays whichever is higher — the NY tax rate or the CT tax rate — because the higher state effectively keeps the difference. For a $150,000 earner, CT's marginal rate is about 6.0% and NY's is about 6.85% — so NY keeps ~0.85% net after credit.

Analysis — CT residents commuting into NY (the satellite office).

1. NY withholding. NY requires withholding on the NY-source portion of wages of a nonresident, which for a physical commuter is 100%. Cobalt withholds NY tax on these wages.
2. CT withholding. Connecticut requires withholding on wages of a CT resident regardless of where earned. So Cobalt also withholds CT PIT on the full wages.
3. Apparent double withholding. Without coordination, both states are withholding on the same wages. The employer should not reduce CT withholding to zero — Connecticut requires the employer to withhold on CT-resident wages and credit is claimed on the resident's CT-1040, not at the withholding stage. (Form CT-W4 line 5 is for nonresidents, not for CT residents working out of state.)
4. CT-1040 credit. On Form CT-1040 Schedule 2, the CT resident claims a credit for the NY tax paid. The credit is limited to the lesser of (a) NY tax on the NY-source income or (b) CT tax on that same income. Because NY's rate is higher, the credit equals the full CT tax on those wages, effectively zeroing out CT's claim. CT does not refund the NY excess; the employee absorbs the difference.
5. Practical employer guidance. Recommend that the CT-resident commuter file a CT-W4 with reduced withholding (Line 3) — they can use IP 2024(8) to compute the reduction such that CT withholding approximates the net CT liability after credit (which may be zero on these wages). However, getting Line 3 reduction approved requires substantiation and is often more trouble than just letting the employee receive a CT refund at filing.

Connecticut withholding totals for Cobalt's payroll. Cobalt withholds CT PIT on:

• 21 CT residents (CT office or satellite-commuter) — full wages.
• 12 NY residents physically working in CT — full wages (CT-source).
• 2 CT residents working at NY satellite — full wages (CT taxes residents on worldwide income).

Cobalt's CT-941 reflects withholding on all 35 employees. Its Form NY-IT-2104 (NY counterpart withholding) reflects withholding on the 14 NY-source employees (12 NY residents + 2 CT residents whose work is NY-source).

CTPL. Cobalt withholds the 0.5% CTPL contribution from every employee physically working in CT, because CTPL coverage follows the location of work. The 2 CT residents working in the NY satellite — these wages are NY-source for CTPL purposes and not subject to CT Paid Leave contribution. The 12 NY residents working in Hartford — these wages are subject to CTPL, even though the employee is a NY resident.

CT UI. Cobalt reports the 12 NY residents working in CT to Connecticut for UI (work performed in CT), and reports the 2 CT residents working in NY to New York for UI (work performed in NY). UI follows the physical location of work under the multi-state "localization of work" test.

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14. Worked Example 2 — CT Employer with TX Remote Workers

Facts. Lighthouse Software Inc. is a Stamford, Connecticut C-corporation with a 100-person headquarters. In 2025, Lighthouse opens a fully remote engineering position. It hires Priya Sharma, a Texas resident in Austin. Priya works exclusively from her home in Austin. She visits the Stamford office twice a year for company offsites (3 days each). Her salary is $180,000.

Question. Does Lighthouse withhold CT income tax on Priya's wages? CTPL? Report her to CT UI?

Analysis.

1. CT PIT withholding — convenience-of-employer rule analysis.

   • Priya is a Texas resident. Texas has no state income tax and no convenience-of-employer rule of its own. Connecticut's reciprocal-trigger formulation means CT's CofE rule generally does not apply to TX remote workers — there's no TX rule to reciprocate against.
   • Priya's wages are sourced based on physical place of performance: Austin, TX, for 359 days; Stamford, CT, for 6 days (2 offsites × 3 days).
   • CT may assert that the 6 Stamford days create CT-source wages: $180,000 × 6/365 ≈ $2,959 of CT-source compensation.
   • For amounts under the de minimis threshold (CT's 14-day rule for nonresident business travelers under Conn. Gen. Stat. §12-711(b)(2)(D) for certain industries), or under the practical materiality threshold DRS applies, Lighthouse may treat the 6-day allocation as immaterial and not withhold. But the safer position is to withhold CT PIT on the 6-day CT-source portion via Priya filing a CT-W4 as a nonresident with Line 5 = 1.65%.
   • Conclusion: Lighthouse does not withhold CT PIT on the bulk of Priya's wages. It may, conservatively, withhold on the CT-source offsite days. Priya files a CT-1040NR/PY if she has CT-source income above the filing threshold.

2. CTPL contribution.

   • CTPL coverage follows the physical place where the employee works for the employer. Priya works in TX, so her wages are not subject to CTPL contribution. Lighthouse does not withhold the 0.5% on Priya's pay.

3. CT UI.

   • UI follows the "localization of work" test from the Federal Unemployment Tax Act §3306. Priya's work is localized in Texas (she works there continuously; the CT offsites are incidental). Lighthouse reports Priya to Texas Workforce Commission for UI, not to CTDOL.
   • Lighthouse must register as a TX employer with TWC for this single employee — an annoyance, but unavoidable.

4. CT paid sick leave.

   • Lighthouse has 100 employees, so it is over the 25-employee 2025 threshold. But the paid sick leave statute applies to employees working in Connecticut. Priya works in Texas — she is not entitled to CT paid sick leave. (She may have rights under any Texas or local law — but TX has no state paid sick leave statute, and Austin's local ordinance is preempted.)

5. Convenience-of-employer audit risk.

   • If DRS audits Lighthouse and asserts the CofE rule against Priya, it would need to show that Priya's remote arrangement is for her own convenience, not Lighthouse's necessity. Lighthouse should document that the remote arrangement is a business necessity — e.g., the role requires expertise that is unavailable in the Stamford labor market, and the position was posted as remote-first, with the offer contingent on a remote arrangement. A well-documented necessity defeats the CofE assertion.
   • If Lighthouse loses the audit, DRS would assert CT PIT on all $180,000 of Priya's wages, plus interest and penalties. With a top marginal CT rate of ~6.5% on her income level, the exposure is roughly $11,700/year per year audited. Over a 3-year audit, ~$35,000 plus interest.

AUDIT FLASH POINT. Maintain a written remote work agreement with each out-of-state remote employee specifying that the remote arrangement is a business necessity for the employer (recruiting reach, specific expertise unavailable locally, business continuity). Without this, the CofE rule audit becomes much harder to defeat. This is especially important for high-income remote employees where the dollar exposure is large.

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15. Worked Example 3 — Contractor Classification under the ABC Test

Facts. Nutmeg Design Studio LLC is a small CT-based graphic design firm with 4 W-2 employees. In 2025 it engages "Jordan," a freelance illustrator, for a 9-month book illustration project. Jordan is paid $90,000 over the engagement on 1099-NEC. Jordan works from his home in New Haven, CT, on his own laptop and tools, sets his own hours, has 4 other clients during the year, runs an LLC called "Jordan Illustration LLC" with his own EIN, and bills Nutmeg by invoice every two weeks. Nutmeg gives Jordan project specs at the start of each chapter but does not supervise his day-to-day work.

In 2026, Jordan files for unemployment in CT after Nutmeg ends the engagement. CTDOL opens a contractor-classification audit of Nutmeg.

Question. Will Jordan be reclassified as an employee under the ABC test?

Analysis.

Prong A — Control.

• Jordan sets his own schedule: passes.
• Jordan uses his own tools (laptop, Wacom tablet, Adobe software on his license): passes.
• Nutmeg provides project specs but does not direct method or means: passes.
• No performance reviews; just invoice-and-deliverable: passes.

Conclusion on Prong A: Nutmeg likely passes.

Prong B — Outside usual course of business OR outside places of business.

• Nutmeg is a graphic design firm. Book illustration is graphic-design-adjacent. Is illustration "outside the usual course of business" of a graphic design firm?
• This is the danger prong. Most CTDOL hearing officers would view illustration as within the usual course of business of a graphic design firm. Even though Nutmeg's 4 W-2 employees are general designers (not illustrators), the firm holds itself out as offering design services that include illustration.
• Alternative test: outside the places of business. Jordan works from his New Haven home, not from Nutmeg's office. If "places of business" is read narrowly (Nutmeg's office only), Jordan passes under the alternative.
• CTDOL's interpretation has been mixed. The CT Supreme Court in Standard Oil of Connecticut, Inc. v. Administrator (2016) held that the disjunctive "or" in Prong B is real — meeting either alternative satisfies the prong. So Jordan working from his home, not from Nutmeg's office, may satisfy Prong B's "outside the places of business" alternative.
• Conclusion on Prong B: Pass under the Standard Oil alternative-place reading, but this is the audit battleground.

Prong C — Independently established business.

• Jordan has an LLC with EIN: passes.
• Jordan has 4 other clients: passes strongly.
• Jordan markets his services (own website, portfolio): passes.
• Jordan bears business risk (could lose money if project goes over budget on a flat fee): passes.
• Jordan files Schedule C: passes.

Conclusion on Prong C: clean pass.

Overall. Jordan is likely correctly classified as an independent contractor. Prongs A and C are clean. Prong B is the only risk, and Standard Oil gives Nutmeg a defensible position. CTDOL will probably find for Nutmeg on this fact pattern — but the audit will be a non-trivial defense.

Counterfactual. Suppose Jordan had only Nutmeg as a client and worked exclusively for Nutmeg for 9 months. Prong C now fails (no independently established business — Jordan is functionally a Nutmeg employee), and the entire analysis collapses regardless of Prong A and B. Jordan is reclassified as an employee, and Nutmeg owes:

• CT UI tax on $90,000 (× 2.5% new-employer-equivalent or Nutmeg's actual rate) ≈ $2,250 — but only on the wage base of $25,000, so actual UI ≈ $625.
• CTPL contribution (0.5% × $90,000) = $450 — but this was the employee's contribution, not the employer's. CTDOL might still assess against Nutmeg under failure-to-withhold theory.
• CT PIT withholding underpayment — could be substantial if Jordan didn't pay quarterly estimates. Penalties under §12-735.
• Federal employment tax exposure (FICA, FUTA) — separate IRS exposure.
• Paid sick leave back-damages — Nutmeg has 5 employees including Jordan now, still below the 2025 threshold of 25, so no exposure there for 2025 specifically.

AUDIT FLASH POINT. The single-client contractor is the highest-risk fact pattern. Even with a clean Prong A and a strong LLC structure on Prong C, a contractor whose entire income comes from one putative employer will fail Prong C in any rigorous audit. Diversify or convert to employment.

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16. Self-Checks

Before delivering a Connecticut payroll work product to the reviewer, confirm each of the following:

1. Each Connecticut employee has a current CT-W4 on file (federal W-4 alone is insufficient).
2. The withholding code (A through F) selected on the CT-W4 matches the employee's filing status and is propagated correctly into the payroll system.
3. CT PIT withholding deposits are made via myconneCT under the correct remitter category (weekly / monthly / quarterly) based on the prior-year look-back.
4. Form CT-941 has been filed for each completed quarter by the last day of the following month.
5. Form CT-W3 with W-2 Copy 1s is filed by January 31 following the wage year.
6. CTDOL UC-2 and UC-5A quarterly returns are filed in ReEmployCT; UI tax is computed on the $25,000 2025 wage base.
7. CTPL 0.5% is withheld from every CT-working employee's pay, capped at the Social Security wage base, and remitted quarterly to ctpaidleave.org.
8. For employers with 25+ employees in 2025 (or 11+ in 2026, 1+ in 2027), the paid sick leave policy and accrual tracking are in place.
9. For each remote out-of-state worker of a CT employer, a written necessity-of-employer documentation is on file to defeat any future CofE audit.
10. Every Form 1099-NEC contractor relationship has been tested against the ABC test with documented Prong A, B, and C analysis.
11. Final pay is processed within Conn. Gen. Stat. §31-71c timelines: next business day for discharge, next regular payday for quit.
12. For CT-resident employees commuting to NY, the CT-1040 Schedule 2 credit mechanism is understood — CT withholding is NOT reduced to zero at source.
13. For NY-resident employees commuting to CT, the CT-W4 nonresident box and Line 5 allocation are completed properly.
14. CT-1096 is filed where the employer paid CT-source 1099 income to a CT resident or withheld CT tax from a 1099 payment.

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17. Summary Table — Connecticut Payroll Obligations at a Glance

Obligation	Form/Channel	Frequency	Due Date
CT PIT deposit (weekly remitter)	myconneCT EFT	Per pay	Wednesday after payday
CT PIT deposit (monthly)	myconneCT EFT	Monthly	15th of following month
CT PIT reconciliation	CT-941 via myconneCT	Quarterly	Last day of month after quarter
Annual CT PIT reconciliation	CT-W3 + W-2 Copy 1	Annual	January 31
1099 reconciliation	CT-1096 + 1099 Copy 1	Annual	January 31
CT UI quarterly	UC-2 + UC-5A in ReEmployCT	Quarterly	Last day of month after quarter
CT Paid Leave	ctpaidleave.org	Quarterly	Last day of month after quarter
Paid Sick Leave accrual	Internal tracking	Per pay	N/A (poster + records required)
New hire reporting	CT New Hire Reporting	Per hire	Within 20 days of hire
Final wages — discharge	Direct deposit / check	One-time	Next business day
Final wages — voluntary quit	Direct deposit / check	One-time	Next regular payday

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18. Statutory and Regulatory Citation Index

• Conn. Gen. Stat. §12-700 — CT personal income tax imposition.
• Conn. Gen. Stat. §12-705 — Employer withholding requirement.
• Conn. Gen. Stat. §12-711(b)(2)(C) — Convenience-of-employer rule for nonresidents.
• Conn. Gen. Stat. §12-735 — Penalty for failure to file/pay withholding.
• Conn. Gen. Stat. §31-57r through §31-57w — Paid Sick Leave.
• Conn. Gen. Stat. §31-49e through §31-49t — CT Paid Leave (CTPL).
• Conn. Gen. Stat. §31-51kk through §31-51qq — CT FMLA.
• Conn. Gen. Stat. §31-71c — Final wages timing.
• Conn. Gen. Stat. §31-72 — Double damages for wage violations.
• Conn. Gen. Stat. §31-222(a)(1)(B)(ii) — ABC test for UI.
• Conn. Gen. Stat. §31-225 — UI experience rating; successor employer.
• Public Act 11-52 (2011) — Original Paid Sick Leave Act.
• Public Act 19-25 (2019) — Paid Family and Medical Leave Insurance Act.
• Public Act 21-200 (2021) — UI Trust Fund Solvency, wage base increases.
• Public Act 23-204 (2023) — 2024+ rate reductions to 2.0% / 4.5%.
• Public Act 24-8 (2024) — Paid Sick Leave expansion to all industries, phased headcount reduction.
• DRS Informational Publication 2025(1) — Connecticut Employer's Tax Guide.
• DRS Informational Publication 2025(7) — Withholding Calculation Rules.
• Standard Oil of Connecticut, Inc. v. Administrator, Unemployment Compensation Act, 320 Conn. 611 (2016) — ABC test Prong B "or" disjunctive reading.

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19. Refusals

This skill does not produce final filings. It produces reviewer briefs and worksheets that a Connecticut-credentialed reviewer (CPA, EA, or attorney) signs off on before any return reaches DRS, CTDOL, or the CT Paid Leave Authority.

This skill does not advise on:

• Connecticut tribal employment.
• Multi-state apportionment for employees working in 3+ states regularly.
• Connecticut nonresident athlete or entertainer withholding (separate regime).
• Wage garnishment computation under specific court orders.
• Workers' compensation classification (separate from UI ABC analysis; defer to a CT WC attorney).
• Public Act 25 or later changes that may post-date the 2025-11-15 last-updated date — verify against current DRS and CTDOL guidance before filing.

End of Connecticut Payroll Skill, version 0.1, last updated 2025-11-15.

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