New York to Connecticut: The Convenience Rule for Hybrid Commuters

Most residency corridors have a simple shape. You leave a high-tax state, you arrive in a lower-tax state, and the difference between the two rate schedules is roughly what you keep. This corridor does not have that shape, and the reason is a single New York regulation that most people moving to Fairfield County have never read.

If you move from New York to Connecticut and you keep working for a New York employer, New York continues to tax one hundred percent of your wages. Not the three days a week you commute to Manhattan. All five. The two days you spend working from a house in Darien or Westport or New Canaan are New York workdays as far as New York is concerned, and New York taxes them at New York rates. That is the convenience of the employer rule, it has been law in some form since the 1960s, and on July 2, 2026 the Appellate Division, Third Department confirmed it yet again, this time against a taxpayer who had been prohibited by executive order from entering his New York office at all.

This is not a small population. At a press conference on March 30, 2026, House Minority Leader Vincent Candelora put the number at roughly 80,000 Connecticut residents working remotely for New York employers and paying New York rather than Connecticut, which Connecticut estimates costs it more than $340 million a year. Those 80,000 people are not doing anything wrong. They are complying with a rule that works exactly as designed.

So the honest framing of this corridor is not "how much tax do I save." It is "which tax do I save." The answer is the New York City resident income tax, all of it, permanently, and that is worth between roughly $5,600 and $38,500 a year for a married couple in the income bands that actually make this move. Everything else on the wage side stays where it was. If you want the version of this analysis where the destination genuinely ends the origin state’s claim on your salary, read moving from New York to Florida instead, because Florida has no income tax and no employer of yours in Hartford waiting to invoke a mirror rule.

The statute is Tax Law section 631. New York source income includes income "derived from or connected with New York sources," including a "profession or occupation carried on" in New York, and where an occupation is carried on "partly within and partly without" New York, the income is apportioned under regulations the Commissioner writes. The regulation the Commissioner wrote is 20 NYCRR 132.18(a), and it is the whole ballgame.

The Tax Department states the operating rule plainly in the instructions to Form IT-203, the nonresident and part-year resident return. "Any allowance for days worked outside New York State must be based upon the performance of services which, because of necessity (not convenience) of the employer, obligate the employee to out-of-state duties in the service of their employer. Such duties are those which, by their very nature cannot be performed at the employer’s place of business."

Then comes the sentence that decides this corridor. "Applying the above principles, normal work days spent at home are considered days worked in New York State, and days spent working at home that are not normal work days are considered to be nonworking days."

Read that carefully, because the default runs against you. A normal work day at home is a New York work day. It is not a neutral fact requiring New York to prove something. It is the starting position, and you carry the burden of moving off it.

There is one clean structural escape, and the same instructions state it. "Under this rule, days worked at home are considered New York work days only if the employee’s assigned or primary work location is at an established office or other bona fide place of business of the employer (a bona fide employer office) in New York State. If the employee’s assigned or primary work location is at an established office or other bona fide place of business of the employer outside New York State, then any normal work day worked at home would be treated as a day worked outside New York State."

That is the real fork in this corridor, and it is a fork about your employer, not about you. If your assigned primary work location is a New York office, the convenience rule applies to your Connecticut days. If your assigned primary work location is somewhere else, or your employer has no New York office at all, the rule never engages and your Connecticut days are Connecticut days. Nothing about how you feel about the commute, how many days you go in, or how genuinely remote your job has become changes which side of that fork you are on.

The definitive case law on this corridor belongs to one man, and he lives in Connecticut. Edward A. Zelinsky is a law professor at Cardozo School of Law in Manhattan. He has now litigated New York’s convenience rule to a final appellate judgment twice, and he has lost twice.

In the first round, the Court of Appeals upheld New York’s taxation of his entire salary for 1994 and 1995, years in which he taught on campus three days a week when classes were in session and worked from his Connecticut home the rest of the time. Matter of Zelinsky v Tax Appeals Trib. of State of N.Y., 1 NY3d 85 (2003), certiorari denied 541 US 1009 (2004). The Court of Appeals reached the same result the following year for a taxpayer with a far thinner New York presence in Matter of Huckaby v New York State Div. of Tax Appeals, 4 NY3d 427 (2005), certiorari denied 546 US 976 (2005).

The second round covered 2019 and 2020, which made it the pandemic case, and it is the one that matters for anyone deciding about this corridor now. Zelinsky filed New York nonresident returns allocating part of his salary to Connecticut and claiming refunds of the withholding on his remote days. The Division of Taxation denied the refunds under 20 NYCRR 132.18(a). An Administrative Law Judge sustained the denial. The Tax Appeals Tribunal sustained it again in May 2025, in DTA docket numbers 830517 and 830681. Zelinsky took it to the Appellate Division under CPLR article 78.

The Third Department decided the case on July 2, 2026: Matter of Zelinsky v Commissioner of Taxation & Fin. of the State of N.Y., 2026 NY Slip Op 04251, docket CV-25-1156, Corcoran, J., with Clark, J.P., Fisher, Powers and Mackey, JJ., concurring. The disposition is one line. "ADJUDGED that the determination is confirmed, without costs, and petition dismissed."

If you are moving to Connecticut with a New York employer, that decision is the most important three months of legal news in your file, and almost nobody selling you a house in Fairfield County is going to mention it.

What makes the 2026 decision so consequential is the fact pattern. Zelinsky was not choosing to work from Connecticut in 2020. He was legally barred from his New York office. On March 20, 2020, Executive Order 202.8 directed nonessential businesses to reduce in-person workforce levels by 100 percent and to implement remote work "to the maximum extent possible." He had been on campus 24 days that year, from January through mid-March, and then not at all.

If any set of facts should defeat a rule that asks whether you worked at home for your own convenience, it is that one. The court said no, and the sentence it used to say no is the sentence to memorize. "Zelinsky was obliged to work off campus, not out of state, in the service of Cardozo Law School during the period covered by the COVID-19 executive order."

That distinction does all the work. The executive order removed the New York office from the menu. It did not put Connecticut on the menu in its place. He could have worked from a rented room in Manhattan, from anywhere. He chose Connecticut, the court said, because it was "the most logical remote site available to him, his Connecticut home, established for his convenience long before the pandemic."

The court then stated the test in a form that applies to every hybrid commuter on this corridor, pandemic or not. "The distinction between work that must be performed at a particular site for the employer’s need or benefit and work that could be performed anywhere remains a rational, practical test."

And it identified precisely what was missing from the record. "As argued by the Commissioner, the law school was indifferent to the state from which faculty delivered videoconference lectures or conducted meetings." Indifference is fatal. The question is never whether your employer told you to stay out of the office. It is whether your employer needed you in Connecticut specifically, and got something from your being there.

The constitutional arguments failed too, and failed in a way that closes the door rather than leaving it ajar. On the dormant Commerce Clause, the court held that "nonresidents do not implicate themselves or their employers in interstate commerce merely by working from home," and that Cardozo "did not establish the requisite nexus to Connecticut or any other state" by sending its faculty home. On due process, it found the minimal connection satisfied because Zelinsky "continued to derive substantial economic and professional benefits from his primary business of teaching students at a New York law school." It also rejected the argument that Comptroller of Treasury of Md. v Wynne, 575 US 542 (2015), and MeadWestvaco Corp. v Illinois Dept. of Revenue, 553 US 16 (2008), had eroded the older holdings, distinguishing both as cases about apportioning income from interstate commercial activity.

The court closed by acknowledging "the continuing debate over New York’s convenience of the employer rule" and the "arguments in favor of new approaches to taxation of remote work," and then handing the whole subject to someone else: "those debates remain the province of the Legislature and the administrative agency that devises and construes the regulation." That is a court telling you not to plan around a judicial fix.

The cases the Third Department collected in 2026 are the best available map of where the line sits, because they show both sides of it.

Employer necessity was established where an employee worked out of state near clients’ construction sites and the employer gained a business advantage from that placement (Matter of Fischer v State Tax Commn., 107 AD2d 918 (3d Dept 1985)), and where the work required specialized equipment that was not available at the employer’s New York office (Matter of Fass v State Tax Commn., 68 AD2d 977 (3d Dept 1979), affirmed 50 NY2d 932 (1980)).

Employer necessity failed for writing television scripts (Matter of Colleary v Tully, 69 AD2d 922 (3d Dept 1979)), composing newspaper columns (Matter of Kitman v State Tax Commn., 92 AD2d 1018 (3d Dept 1983)), telephoning clients (Matter of Speno v Gallman, 35 NY2d 256 (1974)), and conducting research and scholarly writing (Zelinsky I, and Matter of Brody v Chu, 141 AD2d 907 (3d Dept 1988)). The court gave the reason in one clause: "because those tasks could have been performed in New York, or anywhere else for that matter."

Kitman is also the source of the standard courts actually apply, and it is not a gentle one. The out-of-state services must be undertaken due to the employer’s "absolute necessity" rather than the employee’s convenience.

Run your own job against that list honestly. Knowledge work performed on a laptop is on the losing side of every one of these cases. If your duties consist of calls, documents, code, analysis, meetings and email, they can be performed in New York, and New York will say so.

There is a second, more technical route to allocating your Connecticut days out of New York, and it is worth understanding mostly so you can stop hoping for it. Under TSB-M-06(5)I, issued May 15, 2006, a nonresident’s home office can itself qualify as a bona fide employer office, in which case normal work days spent there are treated as days worked outside New York even when the employee’s assigned office is in New York.

The test is a scored one. The home office qualifies if it meets the primary factor, or at least four of the six secondary factors and three of the other factors.

The primary factor is that the home office contains or is near specialized facilities: the employee’s duties require facilities that cannot be made available at the employer’s place of business but are available at or near the employee’s home. A laboratory qualifies. A spare bedroom with a monitor and a good chair does not.

The secondary factors are the home office being required as a condition of employment, the employer having a bona fide business purpose for that specific location, the employee performing core duties there, the employee meeting clients, patients or customers there on a regular and continuous basis, the employer not providing designated office space or other regular work accommodations at one of its regular places of business, and employer reimbursement of home office expenses.

Look at the fifth one, because it is where a hybrid arrangement dies. If your employer gives you a desk, a hot desk, a hoteling reservation system, or any regular accommodation in its New York office, you fail that factor. And a hybrid commuter by definition has somewhere to sit on the days they go in. The bona fide employer office route is built for people whose employer has genuinely no New York workspace for them, not for people who go in on Tuesdays and Thursdays.

Note also what the Third Department said in footnote 2 of the 2026 decision. A separate regulation, 20 NYCRR 132.4, governs nonresidents whose services are performed wholly within or wholly without New York. Zelinsky could not use it, because he had worked on campus 24 days in 2020, so his services were performed "both within and without" New York and 132.18 applied. The court also rejected the argument that the nine months after March 2020 could be treated as a separate taxable period. Twenty-four days in an office in January was enough to pull an entire year under the convenience rule. If you are relying on a very small number of New York days to make the year clean, understand that a very small number of New York days is not zero, and the difference between those two numbers is the difference between two regulations.

Here is the part that makes this corridor worth doing anyway, and it is genuinely worth doing.

New York City levies its own resident income tax on top of the state tax. For 2025 the city schedule for married filing jointly runs 3.078 percent on the first $21,600 of city taxable income, then $665 plus 3.762 percent to $45,000, then $1,545 plus 3.819 percent to $90,000, then $3,264 plus 3.876 percent above $90,000. Only city residents pay it. The city’s nonresident earnings tax was repealed in 1999, so a commuter who works in Manhattan and lives outside the five boroughs owes the city nothing at all.

That is the saving. Not a rate differential on wages, which the convenience rule erases. The complete elimination of a tax that has nothing to do with where you work and everything to do with where you sleep.

On the city rate schedule, a married couple with $150,000 of city taxable income pays about $5,590 a year to New York City. At $250,000 it is about $9,466. At $400,000, about $15,280. At $600,000, about $23,032. At $1 million, about $38,536. Cross the Byram River and every one of those numbers goes to zero, permanently, and it goes to zero whether you commute five days a week or one.

This is also why the corridor is stable in a way most tax-motivated moves are not. The city saving does not depend on winning an argument, documenting an employer necessity, or keeping a day count under a threshold. It depends on one fact that is easy to prove and easy to keep true: you are not a New York City resident. Most of the audit risk on this corridor, as we will get to, is about whether that fact is as clean as you think it is.

You can model the two sides of this against your own numbers with our residency savings and exposure calculator, which separates the piece of the bill a move actually reaches from the piece it does not.

Now the state-level side, which is where the counterintuitive result lives.

As a Connecticut resident, Connecticut taxes you on all of your income. New York, under the convenience rule, taxes the same wages as New York source income. Connecticut resolves the overlap with a credit for income taxes paid to qualifying jurisdictions, claimed on Form CT-1040, Schedule 2, and carried to Line 7 of the return. The credit is the lesser of the tax paid to the other jurisdiction or the tax Connecticut imposes on that same income, and you must attach a copy of the return you filed with the other jurisdiction or the credit is disallowed.

So the practical question is which state’s schedule is higher on your income. If New York’s is higher, the credit is capped at the Connecticut tax on those wages, Connecticut collects nothing on them, and you simply pay New York rates. If Connecticut’s is higher, the credit is capped at what you paid New York, and Connecticut collects the difference.

The 2025 New York State schedule for married filing jointly runs 4 percent to $17,150, then steps through 4.5, 5.25, 5.5 and 6 percent to $323,200, then 6.85 percent to $2,155,350, then 9.65, 10.3 and 10.9 percent. Connecticut’s Table B for the same filing status runs 2 percent to $20,000, then 4.5 percent to $100,000, 5.5 percent to $200,000, 6 percent to $400,000, 6.5 percent to $500,000, 6.9 percent to $1,000,000 and 6.99 percent above that.

On the headline schedules New York looks higher everywhere in the relevant range, and that is the answer most people stop at. It is not quite the answer, because both states bolt recapture provisions onto the schedule. New York requires any filer with New York adjusted gross income above $107,650 to abandon the rate schedule and use a tax computation worksheet that claws back the benefit of the lower brackets, phasing in over $50,000 bands. Connecticut adds a 2 percent phase-out add-back of up to $500 for joint filers with Connecticut AGI above $100,500, and a separate tax recapture under Table D that climbs to $6,800 for joint filers with Connecticut AGI above $1,080,000, on top of phasing out the personal exemption entirely by $71,000 of AGI.

Run both computations with the recapture included and the picture has a crossover in it. Modeling a single income figure as both New York taxable income and Connecticut adjusted gross income, which is a simplification but a directionally sound one, a joint filer at $250,000 pays about $15,000 to New York against about $13,200 of Connecticut tax on the same income, so the credit absorbs the entire Connecticut liability and Connecticut collects nothing. At $400,000 it is roughly $27,400 against $22,500, same result. At $600,000, about $41,100 against $39,500, still the same result but the margin has narrowed to about $1,600.

Somewhere around $680,000 of joint income the two lines cross, and above it Connecticut’s schedule is the higher one. At $1 million the modeled Connecticut tax is about $68,900 against about $68,500 of New York tax, so the credit is capped at the New York figure and Connecticut collects the roughly $400 difference. At $2 million the residual is about $2,700. These are small numbers against the city saving, but they are real, and they are the opposite of what most people assume about a move from New York to Connecticut.

The practical summary: below roughly $680,000 of joint income, this move changes your state wage tax by nothing at all and your city wage tax by all of it. Above that, you pick up a small additional Connecticut liability on top. In neither case does the New York state bill move, and anyone telling you otherwise has not read 132.18.

It is worth knowing that the credit described above is younger than the problem it solves, because it explains why older advice on this corridor is dangerous.

Connecticut’s resident credit is only allowed for taxes paid on income that Connecticut would itself deem taxable by the other state under Connecticut’s own sourcing rules. Before 2019, Connecticut did not source a Connecticut resident’s work-from-home days to New York, because Connecticut had no convenience rule of its own. The consequence was exactly what it sounds like. As the Office of Legislative Research put it, "Connecticut residents who worked for a New York employer and owed taxes to New York for income sourced there under New York’s convenience rule could not claim a resident credit against their Connecticut income taxes for those taxes paid to New York."

That was straightforward double taxation, and it ran for years. Connecticut fixed it in 2018 with Public Act 18-49, section 20, and Public Act 18-169, section 43, codified as Conn. Gen. Stat. section 12-711(b)(2)(C). Since 2019, Connecticut allows the resident credit for taxes paid on that income.

The mechanism it used to fix it is the interesting part, and it cuts the other way for a different set of people. Connecticut adopted its own convenience rule, and made it reciprocal: Connecticut applies the rule only to a nonresident who works remotely for a Connecticut employer and resides in a state that itself imposes a convenience rule. New York is the state that matters here. So a New York resident working from home in Rye for a Stamford employer is sourced to Connecticut under Connecticut’s rule, for the same reason and by the same logic. If that is your direction of travel, the analysis runs through moving from Connecticut to New York, and the trap is the mirror image of this one.

Connecticut is one of at least seven states applying a convenience rule in some form, alongside Alabama, Delaware, Nebraska, New Jersey, New York and Pennsylvania. Connecticut and New Jersey are the two that apply it reciprocally.

Connecticut has not accepted the status quo quietly. It filed an amicus brief supporting New Hampshire when New Hampshire moved in the U.S. Supreme Court in October 2020 to challenge Massachusetts’ temporary pandemic convenience regulation. The Court denied the motion in June 2021 without explanation. In 2025 the Governor directed the Attorney General to study the state’s options, and the resulting December 2025 report concluded that "The U.S. Supreme Court has held that a state lacks standing to sue on its own behalf in situations such as this."

What Connecticut did instead was borrow New Jersey’s idea and raise it. New Jersey enacted a credit in 2023 for residents who take on another state’s convenience rule: a refundable credit equal to 50 percent of the tax owed to New Jersey, for residents who worked remotely for an out-of-state company between 2020 and 2023 and were denied a refund by that state. To claim it, the taxpayer has to file and win an appeal in the other state’s tax court and actually obtain a refund.

Connecticut’s version arrived in Public Act 25-172. A Connecticut resident who is subject to and successfully challenges another state’s convenience of the employer rule gets a credit against the Connecticut income tax equal to 60 percent of the Connecticut tax they owe as a result of the readjustment to their credit for taxes paid.

Understand what that credit is and is not. It is not a subsidy for filing a protective refund claim. It pays out only after you win, and winning means a judgment in New York, on the rule Zelinsky has now lost on twice at the highest level he could reach. The uptake figure tells you how that is going: as of the Office of Legislative Research’s May 2025 report, the New Jersey Division of Taxation said exactly one taxpayer had used its program, receiving a refundable credit of $7,797 for the 2020 tax year.

One taxpayer. So treat the Connecticut credit as what it is: a real provision, worth knowing about if you have a genuinely strong employer-necessity record, and not a reason to plan your move around litigating.

The convenience rule is annoying but it is not an audit. It is a sourcing rule applied on a return. The thing on this corridor that turns into a six-figure assessment is different, and it is the apartment.

Under Tax Law section 605(b)(1)(B), a person not domiciled in New York is nonetheless taxed as a New York resident on worldwide income if they maintain a permanent place of abode in New York for substantially all of the taxable year and spend more than 183 days of the year in New York. Both prongs have to be met, and exactly 183 days does not trigger it.

Now read that against a hybrid commuter’s actual life. You go into the Manhattan office three days a week, which is roughly 150 days a year before you add a single dinner, show, doctor’s appointment, client lunch or Saturday with friends, and under 20 NYCRR 105.20 any part of a day in New York counts as a full day. A layover counts. Landing after midnight counts. There is no general travel-through carve-out. Getting from 150 to 184 is not hard; it is what an ordinary year looks like.

The second prong is the one people assume protects them, and since 2022 it protects them less than it used to. New York’s audit guidelines define "substantially all of the taxable year" for the permanent place of abode prong as a period exceeding 10 months, down from 11. An abode held for more than 10 months now counts. A pied-a-terre kept "for late nights" is an abode. A room in a family member’s apartment that is maintained for your primary use is an abode. Matter of Gaied v New York State Tax Appeals Tribunal (N.Y. Ct. App. 2014) established that merely holding a dwelling is not enough and that the taxpayer must have a residential interest in it and actually use it as a residence, and Matter of Obus (App. Div., 3d Dept., 2022) pushed the analysis further toward the taxpayer’s actual subjective use rather than the objective characteristics of the dwelling. Those are real defenses. They are also defenses, which means you are already in the audit.

If both prongs land, you are a New York statutory resident, and New York taxes your worldwide income, not just your wages. The city saving you moved for is intact, because statutory residency for state purposes does not make you a city resident, but the state exposure is now everything you earn, including investment income Connecticut was going to tax at its own rate and New York now wants too.

The full New York exit picture, including domicile factors and what the Department pulls in an audit, is in our New York residency intelligence guide, and the corridor-specific version is on the moving from New York to Connecticut page.

The symmetry on this corridor is easy to miss. Connecticut has the same two-prong structure New York does, pointed the other way, and it matters for the reverse commuter and for anyone who moves to Connecticut without actually living there very much.

Under Conn. Gen. Stat. section 12-701(a)(1), a person not domiciled in Connecticut is taxed as a resident if they maintain a permanent place of abode in Connecticut and spend more than 183 days of the taxable year in the state. Presence for any part of a day generally counts, consistent with the neighboring statutory residency states. Connecticut’s regulations do carve out one thing New York does not: an abode that is genuinely temporary and work-related, such as an apartment used only for a limited assignment, is not a "permanent" place of abode even if occupied for a long stretch.

On domicile, the DRS regulations at Conn. Agencies Regs. section 12-701(a)(1)-1 direct examiners to weigh real estate, business, social and civic connections without an exhaustive checklist, which in practice mirrors New York’s five-factor approach: home use, time spent, business involvement, where the family is, and where the near and dear personal items live.

Do not read Connecticut as the relaxed state in this pair. Connecticut scores 4 out of 5 on both audit aggressiveness and exit stickiness in our dossier, and it is named alongside New York, California and New Jersey among the more aggressive residency audit jurisdictions. The Department of Revenue Services has ten years to collect an assessed liability since Public Act 22-117 amended section 12-35, against a three-year assessment window under section 12-733, and no limit at all on fraudulent or unfiled returns. Its posture on close domicile calls was on display in Daniels v. Commissioner of Revenue Services (Conn. Sup. Ct., SC21150, June 16, 2026), where the Connecticut Supreme Court lowered the standard of proof in an estate tax domicile appeal from clear and convincing evidence to a preponderance and remanded for a new trial, a decision that helps taxpayers and also confirms Connecticut will litigate these cases for years rather than concede them.

The detail on Connecticut’s tests, audit behavior and exit exposure is in our Connecticut residency intelligence guide.

Put the pieces together and you get an unusual requirement. This corridor needs two independent day counts maintained simultaneously, for two different purposes, and a record that answers one does not answer the other.

The first count is New York days, against the 184-day statutory residency line. This one is adversarial. Every day you are physically in New York for any part of the day counts, and the count includes the commute days you are already planning plus everything else: the evening out, the parent’s birthday in Queens, the flight that lands at LaGuardia at 11:40 pm. This is the count that decides whether New York taxes your worldwide income or only your wages.

The second count is workday allocation, which is a completely different animal. Form IT-203-B, Schedule A asks you to allocate wages by days, and the convenience rule then tells you that your normal Connecticut work days count as New York work days anyway. The allocation count matters for the small set of days that genuinely are not New York days: actual vacation, actual sick days, genuine non-working days, and any days you can support as employer necessity. It also matters because a workday allocation that contradicts your presence records is the fastest way to lose credibility on both.

People routinely keep one of these and assume it covers the other. It does not. A calendar that shows three office days a week is not a presence record, because it says nothing about the weekends. A travel log that shows where you slept is not a workday allocation, because it does not distinguish a work day from a Saturday. New York auditors reconcile both against cell records, tolls, credit card data and building access logs, and they reconcile them against each other.

Ask your employer what your assigned primary work location is, in writing, and find out whether it is going to change. This is the single question that determines whether the convenience rule applies to you at all, and it is a question about your employer’s records, not your preferences. If there is a real prospect of being reassigned to a Connecticut or fully remote location, the timing of that reassignment is worth more than anything else in this article.

Do not build a plan around an employer-necessity claim unless you have the facts for one. After the July 2026 decision, an executive order barring you from the office is not enough. What is enough looks like specialized facilities near your home that the employer cannot provide, or an employer that derives a genuine business advantage from your being in Connecticut specifically. If you think you have that, document it contemporaneously and get it into your employer’s own records, not just yours.

Deal with the New York apartment deliberately. Selling or surrendering it removes the permanent place of abode prong entirely and takes statutory residency off the table regardless of your day count. Keeping it means you have chosen to live inside the 184-day test, and you should decide that on purpose rather than by default. If you keep it, know that 10 months of the year is now the threshold, not 11.

Start counting New York days on January 1 of the move year, not in April when you file. Any part of a day counts, and reconstructing a year of presence from memory and bank statements after New York opens an audit is how people who were actually under the line lose anyway.

File on both sides. Form IT-203 with Schedule A of Form IT-203-B for the New York nonresident allocation, and Form CT-1040 with Schedule 2 for the Connecticut resident credit, attaching a copy of the New York return. Connecticut will disallow the credit if the other state’s return is not attached, and that disallowance turns a corridor with no state-level cost into one with a full second layer of tax.

Move the license, the registrations, the voter registration, the physician, the dentist and the mailing address for your financial documents, and move them early. Both states weigh substantially the same connections, so every item you leave in New York is an adverse fact in the New York domicile analysis and a weak fact in the Connecticut one.

Sequence any liquidity event with care. A business sale, a large vesting or an option exercise in the move year is the classic trigger in both directions, and Connecticut practitioners specifically describe DRS as pursuing departures that follow a liquidity event. Get the residency position settled well before the event rather than around it.

The Mobility Map records days and nights by state as they happen, which is what this corridor needs because it needs two counts at once. New York presence against the 184-day statutory residency line under Tax Law section 605(b)(1)(B), counted the way 20 NYCRR 105.20 counts it, where any part of a day is a full day. And Connecticut presence against the 183-day test in Conn. Gen. Stat. section 12-701(a)(1). A record that answers only one of those leaves the other state’s argument untouched.

Evidence Vault holds what both states ask for: the Connecticut lease or closing documents with their dates visible, the disposition of the New York apartment and its sale or surrender terms, the Connecticut driver’s license with evidence of the New York surrender, the vehicle registrations, the voter registration, the mail redirection, the new physician and dentist records, any written statement of your assigned primary work location from your employer, and Form IT-203 with its IT-203-B Schedule A alongside Form CT-1040 with its Schedule 2 and the attached New York return.

AuditIQ surfaces the contradictions this corridor produces most often: a New York apartment held for more than 10 months while New York presence runs past 183 days, a workday allocation on Schedule A that does not reconcile with the presence record, Connecticut days that fall short while no part-year position has been filed, a New York license or registration still current, a New York mailing address still receiving financial documents, and a Connecticut resident credit claimed without the New York return attached.

ResidencyIQ organizes records and highlights potential exposure factors. It is not a law firm or an accounting firm and does not provide legal or tax advice; work with a qualified CPA or tax attorney on your own domicile, filings, and state exposure.

The July 2026 decision quoted throughout, including "Zelinsky was obliged to work off campus, not out of state," the holding that "the distinction between work that must be performed at a particular site for the employer’s need or benefit and work that could be performed anywhere remains a rational, practical test," the finding that "the law school was indifferent to the state from which faculty delivered videoconference lectures or conducted meetings," the dormant Commerce Clause holding that "nonresidents do not implicate themselves or their employers in interstate commerce merely by working from home," the 24 on-campus days in 2020, the footnote 2 discussion of 20 NYCRR 132.4 and the refusal to treat the post-March 2020 period as a separate taxable period, the collected employer-necessity cases (Fischer, Fass, Colleary, Kitman, Speno, Brody), the Kitman "absolute necessity" standard, the treatment of Wynne and MeadWestvaco, and the disposition confirming the determination, is Matter of Zelinsky v Commissioner of Taxation & Fin. of the State of N.Y., 2026 NY Slip Op 04251 (3d Dept, July 2, 2026), docket CV-25-1156: https://www.nycourts.gov/reporter/3dseries/2026/2026_04251.htm. The Tax Appeals Tribunal decision it reviewed, in DTA docket numbers 830517 and 830681, is summarized at https://www.hodgsonruss.com/Noonans-Notes-Blog/strike-two-in-zelinsky-ii-tax-appeals-tribunal-upholds-the-convenience-rule-again and https://ryan.com/about-ryan/news-and-insights/2025/zelinsky-ii-remote-work/. Practitioner analysis of the 2026 decision is at https://ogletree.com/insights-resources/blog-posts/new-york-professor-denied-tax-withholding-for-out-of-state-pandemic-remote-work/.

New York’s statement of the convenience rule quoted in full, including "Any allowance for days worked outside New York State must be based upon the performance of services which, because of necessity (not convenience) of the employer, obligate the employee to out-of-state duties," "normal work days spent at home are considered days worked in New York State," and the bona fide employer office carve-out for an assigned or primary work location outside New York, is in the Department of Taxation and Finance’s instructions to Form IT-203, IT-203-I (2025), at the Schedule A discussion: https://www.tax.ny.gov/pdf/current_forms/it/it203i.pdf. The underlying regulation is 20 NYCRR 132.18(a) and the statute is Tax Law section 631.

The bona fide employer office test, requiring the primary factor or at least four secondary factors and three other factors, with the primary factor keyed to specialized facilities at or near the employee’s home and the secondary factors including the absence of designated office space at the employer’s regular place of business, is TSB-M-06(5)I, New York Tax Treatment of Nonresidents and Part-Year Residents Application of the Convenience of the Employer Test to Telecommuters and Others (May 15, 2006): https://www.tax.ny.gov/pdf/memos/income/m06_5i.pdf.

Connecticut’s reciprocal convenience rule, the pre-2019 denial of the resident credit quoted as "Connecticut residents who worked for a New York employer and owed taxes to New York for income sourced there under New York’s convenience rule could not claim a resident credit," the 2018 fix in Public Act 18-49 section 20 and Public Act 18-169 section 43 codified as Conn. Gen. Stat. section 12-711(b)(2)(C), the list of at least seven convenience rule states, the reciprocal application by Connecticut and New Jersey alone, the New Hampshire motion denied by the U.S. Supreme Court in June 2021, and the New Jersey credit of 50 percent for tax years 2020 through 2023 with exactly one taxpayer having claimed it for $7,797 in 2020, are in the Connecticut Office of Legislative Research report 2025-R-0067, "Convenience of the Employer Rule," by Rute Pinho, May 2, 2025: https://www.cga.ct.gov/2025/rpt/pdf/2025-R-0067.pdf.

Connecticut’s 60 percent credit for a resident who successfully challenges another state’s convenience rule, described as a "credit against the tax imposed under chapter 229 (other than the liability imposed by Conn. Gen. Stat. section 12-707) equal to sixty per cent (60%)" of the resulting Connecticut tax, enacted in Public Act 25-172 and reflected at Conn. Gen. Stat. section 12-704, is in the Department of Revenue Services 2025 legislative overview: https://portal.ct.gov/drs/miscellaneous-taxes/other-tax-page/state-tax-developments/2025-developments/income-tax. The roughly 80,000 affected Connecticut residents, the $340 million annual figure, the March 30, 2026 legislative press conference, and the December 2025 Attorney General report concluding that "The U.S. Supreme Court has held that a state lacks standing to sue on its own behalf in situations such as this," are reported at https://ctexaminer.com/2026/03/31/connecticut-residents-work-from-home-but-their-taxes-go-to-new-york/ and https://www.yankeeinstitute.org/2026/03/31/connecticut-residents-work-from-home-but-their-taxes-go-to-new-york/.

The 2025 New York State tax rate schedule and the 2025 New York City tax rate schedule used for every New York figure in this article, including the city brackets at $21,600, $45,000 and $90,000 for joint filers with rates of 3.078, 3.762, 3.819 and 3.876 percent, and the requirement that filers with New York adjusted gross income above $107,650 use the tax computation worksheets rather than the rate schedule, are in the instructions to Form IT-201, IT-201-I (2025): https://www.tax.ny.gov/pdf/current_forms/it/it201i.pdf.

Connecticut’s 2025 Tax Calculation Schedule and its Tables A through E, including the Table B brackets at $20,000, $100,000, $200,000, $400,000, $500,000 and $1,000,000 for joint filers with rates from 2 percent to 6.99 percent, the Table A personal exemption phasing to zero above $71,000 of Connecticut AGI for joint filers, the Table C 2 percent phase-out add-back reaching $500 above $145,500, the Table D tax recapture reaching $6,800 above $1,080,000, and the Schedule 2 credit for income taxes paid to qualifying jurisdictions with its requirement that the other jurisdiction’s return be attached or the credit is disallowed, are in the Form CT-1040 instructions (Rev. 12/25): https://portal.ct.gov/-/media/drs/forms/2025/income/2025-ct-1040-instructions_1225.pdf.

New York’s statutory residency test under Tax Law section 605(b)(1)(B) requiring both a permanent place of abode maintained for substantially all of the taxable year and more than 183 days in the state, the any-part-of-a-day counting rule under 20 NYCRR 105.20 with its narrow medical and pass-through exceptions, the 2022 audit guideline change defining "substantially all of the taxable year" as more than 10 months rather than 11, the five primary domicile factors, Matter of Gaied v New York State Tax Appeals Tribunal (N.Y. Ct. App. 2014) on residential interest and actual use, Matter of Obus (App. Div., 3d Dept., 2022) on subjective use, the audit aggressiveness score of 5 out of 5, and the continuing New York claim on deferred compensation and options tied to New York services, are from our New York residency guide.

Connecticut’s statutory residency test under Conn. Gen. Stat. section 12-701(a)(1), the regulatory carve-out for a genuinely temporary work-related abode, the domicile factors in Conn. Agencies Regs. section 12-701(a)(1)-1, the seven brackets from 2 percent to 6.99 percent with the benefit recapture provision, the audit aggressiveness and exit stickiness scores of 4 out of 5, the three-year assessment window under Conn. Gen. Stat. section 12-733 against the ten-year collection window added by Public Act 22-117 amending section 12-35 with no limit for fraudulent or unfiled returns, the practitioner description of DRS pursuing departures following a liquidity event, the Form CT-1040NR/PY part-year filing path, and Daniels v. Commissioner of Revenue Services (Conn. Sup. Ct., SC21150, June 16, 2026) lowering the domicile standard of proof to a preponderance of the evidence and remanding for a new trial, are from our Connecticut residency guide.

The repeal of the New York City nonresident earnings tax in 1999, leaving the city income tax applicable to residents only, is summarized at https://www.nycaccountingconsulting.com/nyc-income-tax-rates-2025/ and https://blog.turbotax.intuit.com/income-tax-by-state/new-york-108193/.