Connecticut to Florida: A Residency Audit Toolkit That Mirrors New York’s

Connecticut loses people to forty other states, and one of them dominates. In the IRS migration data for the 2021 to 2022 tax year, the Yankee Institute reports that Connecticut "lost 9,966 people (or 38% of the population loss from all states) to the Sunshine State," against a net loss of 6,467 people across all forty. No other destination is close. If you are leaving Connecticut, you are statistically leaving for Florida, and the Department of Revenue Services knows the shape of that file before it opens it.

That concentration is the first thing to understand about this corridor. New York spreads its outflow across Florida, New Jersey, Texas, Pennsylvania and the Carolinas, so a New York auditor sees many patterns. Connecticut sees one pattern, over and over, mostly from the same handful of towns, and mostly from people whose income is large enough that the state notices when it stops arriving. Practitioners describe DRS as auditing Connecticut to Florida movers at high rates, and as paying particular attention to departures that follow a liquidity event such as a business sale, because Connecticut’s revenue base is unusually concentrated among high earners in Fairfield County and towns like it.

The second thing to understand is more useful. Connecticut did not invent its own residency framework. It borrowed New York’s. The two-prong resident test, the any-part-of-a-day counting rule, the burden on the person claiming the change, the long factor list that examiners walk: all of it reads like New York with the serial numbers filed off. That is genuinely good news, because it means the evidence file that survives a New York audit is the same file that survives a Connecticut one, and there is far more published guidance on how New York runs these cases than there is on how DRS runs them.

The third thing is where this article earns its keep. Connecticut diverges from New York in exactly three places that matter, and every one of them cuts differently than people expect. This article is informational and is not legal or tax advice; work through your own facts with a qualified CPA or tax attorney.

Connecticut’s resident definition lives in Conn. Gen. Stat. section 12-701(a)(1) and is fleshed out in Conn. Agencies Regs. section 12-701(a)(1)-1. The regulation opens with a warning worth reading twice: "An individual may be a resident of Connecticut for income tax purposes, and taxable as a resident, even though he or she would not be deemed a resident for other purposes."

Then it gives the two prongs. A resident individual includes "all individuals domiciled in Connecticut, subject to the exceptions set forth in subsection (b) of this section," and "any individual (other than an individual in the armed forces of the United States) who is not domiciled in Connecticut but who maintains a permanent place of abode in Connecticut, and spends in the aggregate more than 183 days of the taxable year in Connecticut."

Set that beside N.Y. Tax Law section 605(b)(1)(B), which reaches an individual "who maintains a permanent place of abode in this state and spends in the aggregate more than one hundred eighty-three days of the taxable year in this state, whether or not domiciled in this state for any portion of the taxable year." The structure is identical: an abode prong and a day prong, joined by "and," with 183 as the number in both.

Day counting is also the same, with one Connecticut refinement in your favor. The regulation says "a day spent within Connecticut includes any part of a day, except for a part of a day during which an individual is present solely while in transit to a destination outside Connecticut." Any part of a day is a day, exactly as in New York, but a pure transit stop does not count. Bradley International is in Windsor Locks and a great deal of Fairfield County flies out of Westchester or LaGuardia, so the transit carve-out matters less on this corridor than it sounds, but it is there and it is written down.

And the recordkeeping burden is explicit. The regulation states that a nonresident with a Connecticut abode "shall have records available for examination by the Department to substantiate the fact that such individual spent 183 days or less within Connecticut." Not shall be presumed. Shall have records available. Someone moving from Connecticut to Florida who keeps the Connecticut house has taken on an affirmative documentation obligation, and it runs every year the house stays.

Subsection (b) of the regulation is the most underused provision in Connecticut residency planning. It says that an individual domiciled in Connecticut is nonetheless a nonresident for a taxable year if, for that year, the individual satisfies all three of the following: "the individual maintains no permanent place of abode inside Connecticut during such year"; "the individual maintains a permanent place of abode outside Connecticut during such entire year"; and "the individual spends in the aggregate not more than 30 days of the taxable year in Connecticut."

Read what that does. It is a nonresidency result that does not require you to win a domicile argument at all. You can concede Connecticut domicile, or leave it unresolved, and still file as a nonresident, provided you hold no Connecticut abode, hold an abode elsewhere for the whole year, and keep Connecticut days at 30 or fewer. New York has the same shape of rule in Tax Law section 605(b)(1)(A)(i), and New York pairs it with a second, foreign-only safe harbor built on 450 days abroad inside a 548-day period. Connecticut has no 548-day counterpart. The 30-day rule is the whole of it.

Two cautions. First, the regulation puts the burden squarely on you: "An individual who is a Connecticut domiciliary bears the burden of demonstrating that the conditions set forth above have been met when claiming to be a nonresident during the taxable year." Second, it is annual and it is all-or-nothing. The regulation continues: "if for any taxable year those conditions are not met, an individual shall be subject to Connecticut income tax as a resident for that year." Thirty-one days, or one month of the year with a Connecticut lease still running, and the year flips to full resident taxation on worldwide income.

For most people on this corridor the 30-day rule is not the plan, because most people keep the Connecticut house. But it is the reason the disposal date on that house is a tax decision. Selling in February rather than November can be the difference between a clean nonresident year and a year spent arguing about domicile.

Connecticut’s domicile standard is the familiar one: "the place which an individual intends to be his or her permanent home and to which such individual intends to return whenever absent," with the rule that "a domicile once established continues until the individual moves to a new location with the bona fide intention of making his or her fixed and permanent home there." The burden sentence is the one to memorize: "The burden is upon an individual asserting a change of domicile to show that the necessary intention existed."

The regulation then lists twenty-eight lettered items, from (A) through (BB), that "shall be considered in determining whether or not an individual is domiciled in Connecticut," and closes with two limits: "Any one of the items listed shall not, by itself, determine domicile. Charitable contributions shall not be considered in determining whether an individual is domiciled in Connecticut." Connecticut practitioners compress the list to five working factors, and the compression is instructive because it is New York’s compression: an analysis of your homes, your business ties in the states involved, an analysis of the items considered near and dear to you, your family connections, and the time you spend in each location.

Four of the twenty-eight are worth quoting because they are the ones movers fail on without noticing. Item (G) looks at the "present status of former living quarters, i.e., whether it was sold, offered for sale, rented or available for rent to another." A Connecticut house that is simply kept, not sold and not genuinely rented, is a live factor every year, and it is the single most common failure on this corridor.

Item (M) looks at the "jurisdiction from which any motor vehicle registration was issued and the actual physical location of the vehicles." Note the second half. It is not enough to hold Florida plates; the regulation asks where the cars physically sit. Connecticut is unusual in taxing registered motor vehicles at the municipal level, capped by Conn. Gen. Stat. section 12-71e at 32.46 mills for the assessment year commencing October 1, 2021 and thereafter, which means every Connecticut-registered vehicle generates an annual town tax bill in your name at a Connecticut address. That is a piece of paper you file, or fail to file, once a year.

Item (W) is the one that punishes an even split. It measures the "percentage of time (excluding hours of employment) that the individual is physically present in Connecticut" against the same percentage for every other jurisdiction. Excluding hours of employment. A retiree or a post-sale founder has no employment hours to exclude, which means the factor collapses into raw calendar time, and raw calendar time is exactly what a snowbird pattern gets wrong.

And item (BB), last on the list, is the "location where pets are licensed." Connecticut wrote the dog into the regulation. New York had to arrive at the same place through case law, in the determination where an administrative law judge held that a taxpayer’s dog was his near and dear item and fixed the change of domicile at the month the dog moved. Connecticut simply made it factor (BB).

This is the first place the two states part company, and it favors the taxpayer. New York’s abode analysis has produced years of litigation over dwellings the taxpayer barely used, because the statute itself says little about what "permanent" means. Connecticut wrote the exclusions into the regulation.

The definition starts broad: a permanent place of abode is "a dwelling place permanently maintained by an individual, whether or not owned by or leased to such individual," and it "generally includes a dwelling place owned by or leased to his or her spouse." Then come four carve-outs.

The lease carve-out is the most valuable one on this corridor. A permanent place of abode "shall generally not include, during the term of a lease, a dwelling place owned by an individual who leases it to others, not related to the owner or his or her spouse by blood or marriage, for a period of at least one year, where the individual has no right to occupy any portion of the premises and does not use such premises as his or her mailing address during the term of the lease." Every clause is a requirement. A one-year minimum term, an arm’s-length tenant, no reserved right to occupy any part of the property, and no use of the address for mail. A Connecticut house rented to a stranger on a twelve-month lease, with your mail redirected and no owner’s suite kept back, stops being an abode. The same house rented to your brother, or rented for nine months, or rented with the guest wing reserved for August, does not.

The vacation carve-out is narrower than people hope: "a mere camp or cottage, which is suitable and used only for vacations, is not a permanent place of abode." Suitable and used only for vacations. A winterized four-bedroom in Litchfield County that you occupy for five months is neither.

Third, "a barracks, motel room or any construction which does not contain facilities ordinarily found in a dwelling, such as facilities for cooking, bathing, etc., shall generally not be deemed a permanent place of abode."

Fourth, and with no New York equivalent this clean, "a place of abode is not deemed permanent if it is maintained only during a temporary stay for the accomplishment of a particular purpose." The regulation gives its own example: an individual domiciled elsewhere who is assigned to an employer’s Connecticut office "for a fixed and limited period, after which he is to return to his permanent location," and who uses a Connecticut apartment during that period, "is not deemed a resident, even though he spends more than 183 days of the taxable year in Connecticut, because his place of abode is not permanent." The regulation is equally clear about the other side of that line: "if his assignment to his employer’s Connecticut office is for an indefinite period, his Connecticut apartment shall be deemed a permanent place of abode." Fixed and limited, documented as such, is the defense. Indefinite is not.

One trap in the same passage, because it runs against the direction of this corridor. The regulation warns that "no change of domicile results from a removal to a new location if the intention is to remain there only for a limited time; this is the case even though the individual may have sold or disposed of his or her former home." Selling the Connecticut house does not, by itself, complete a move. Anyone moving from Florida to Connecticut on a defined assignment should read that sentence and the temporary-abode example together, because the pair of them is the whole argument.

New York has an estate tax. Connecticut has an estate tax and, alone among the fifty states, its own gift tax, and the combination changes what a Connecticut exit is actually protecting.

The Department of Revenue Services states the current thresholds plainly: "For estates of decedents dying during 2026, the Connecticut estate tax exemption amount is $15 million," with the same $15 million threshold applying to gifts made in 2026, a flat 12 percent rate on amounts above the exemption, and an aggregate ceiling: "For calendar years beginning on or after January 1, 2019, the aggregate amount of Connecticut gift and estate tax payable shall not exceed $15 million."

The gift tax is where residency does visible work. Per DRS, the Connecticut gift tax reaches federal taxable gifts "made by a resident or nonresident of Connecticut on or after January 1, 2005." For a resident, taxable gifts include "real property or tangible personal property located in Connecticut as well as intangible personal property wherever located." For a nonresident, they include "only real property or tangible personal property located in Connecticut." That is a bright line with real money behind it. A Connecticut resident who gifts a nine-figure position in a private company is inside the Connecticut gift tax. A genuine Florida domiciliary who gifts the same position is outside it, because the shares are intangible and are not Connecticut property. Anyone planning a large lifetime transfer around a move should know that the transfer date and the domicile date interact.

Estate tax is the mirror image, and it is why this divergence matters more in Connecticut than the income tax does. Connecticut’s income tax exposure for a departing resident is a per-year number that eventually ends. The estate tax exposure is a single number, assessed once, on a domicile question that is decided after you are no longer available to explain your own intent. And DRS does audit that question.

Daniels v. Commissioner of Revenue Services, SC 21150, decided by the Connecticut Supreme Court on June 16, 2026 and reported at 354 Conn. 768, is the best available picture of how DRS litigates a Connecticut to Florida domicile claim, and it is worth reading as a fact pattern before reading it as law.

The decedent, a wealthy retired executive, maintained homes in Connecticut, Florida and Arizona. He spent roughly five and a half months a year in Connecticut, from May to mid-October, about three and a half months in Florida and about three months in Arizona. On the Florida side the paper was in place and had been for years: a Florida declaration of domicile obtained in 2006, a Florida driver’s license, Florida voter registration and a Florida bank account. He also kept substantial Connecticut ties, including four vehicles registered in Connecticut. DRS determined he died a Connecticut resident and assessed more than $13 million in estate tax, reported by one firm covering the case as $13.2 million.

Look at what that assessment survived. A 2006 declaration of domicile, a license, a voter registration and a bank account, all of it authentic, all of it old, and none of it dispositive. What DRS had on the other side was regulation item (W) and regulation item (M): five and a half Connecticut months against three and a half Florida months, and four cars sitting in Connecticut with Connecticut plates. The paper said Florida. The calendar and the driveway said Connecticut.

On the law, the Supreme Court gave the estate two things. It rejected the clear and convincing evidence standard the trial court had applied and held that the ordinary civil preponderance of the evidence standard governs, on the general Connecticut rule that when a civil statute is silent, as estate tax appeals are, the default is the lesser standard. It reasoned that "rather than technocratic rulings based on objective data on which courts might justifiably defer to DRS, domicile turns on a decedent’s subjective intent and the unique facts and circumstances of his or her life," and it clarified that a Superior Court appeal of a DRS domicile determination is de novo, so the determination gets no deference. The case was remanded for a new trial under the preponderance standard.

It also left the hard part in place. As Cummings and Lockwood summarizes the holding, "decedents are presumed by statute to be Connecticut residents, and the ultimate burden of overcoming that presumption remains on a decedent’s estate." A lower standard of proof is a real procedural win. It is not a presumption of nonresidency, and it does not help an estate whose evidence is a declaration of domicile and a calendar that points the other way.

The operating lesson for a living taxpayer is narrow and blunt. Connecticut fought this case over a time split, and a time split is the one factor a contemporaneous record can settle cheaply while you are alive and cannot settle at all once you are not.

This is the divergence that makes Connecticut to Florida materially safer than New York to Florida for a remote worker, and almost nobody on this corridor knows it.

Connecticut does have a convenience of the employer rule. Conn. Gen. Stat. section 12-711(b)(2)(C) provides that "for purposes of determining the compensation derived from or connected with sources within this state, a nonresident natural person shall include income from days worked outside this state for such person’s convenience if such person’s state of domicile uses a similar test."

Read the last clause. Connecticut’s rule is conditional. It applies only if the worker’s state of domicile applies a similar test to Connecticut residents, which is why it was enacted in 2019 as a reciprocal answer to New York, Pennsylvania, Delaware and Nebraska rather than as a revenue grab of its own.

Florida has no income tax and therefore no convenience rule. The condition in section 12-711(b)(2)(C) is not satisfied, so a genuine Florida domiciliary working remotely for a Connecticut employer is not pulled back into Connecticut on convenience days. Compare the New York side of the same fact pattern: 20 NYCRR 132.18(a) applies to a nonresident regardless of what the new state does, which is why someone moving from New York to Florida with a New York employer keeps paying New York tax on wages while Florida offers no credit to recover it. On the Connecticut corridor that mechanism is simply absent.

Two limits keep this from being a free pass. Days you physically work in Connecticut are Connecticut source income under section 12-711(b)(2)(A), which reaches "compensation paid to a nonresident natural person for rendering personal services as an employee in this state." And the statute’s own de minimis relief is narrow: a nonresident employee present in Connecticut for no more than 15 days in a year is not taxed on that work compensation, but a nonresident present more than 15 days must report all Connecticut-source work compensation for the year. Sixteen days of visits to the Stamford office, and the allocation begins at day one.

The practical consequence is that on this corridor the savings math is unusually honest. Connecticut’s brackets run from 2 percent to 6.99 percent with the top rate reaching high earners, it applies a benefit recapture that claws back the value of the lower brackets, and it taxes capital gains as ordinary income with no preferential rate, all of which is detailed in our Connecticut residency guide. Replace that with Florida’s zero and, unlike the New York corridors, the wages really do stop being taxable by the origin state once residency changes. Running a residency savings and exposure calculator on this pair produces a number you can mostly believe, provided the residency change is real.

Florida has no statutory residency test, no day-count threshold and no residency audit, because it has no income tax to audit. Per our Florida residency guide, Florida residency status matters for homestead, probate and asset protection, not for an income tax trigger, which means every Florida filing you make exists for one purpose in this context: to be evidence in Connecticut.

Two of those filings are unusually strong, and both of them require you to make an assertion about Connecticut.

The declaration of domicile under Fla. Stat. section 222.17 is the one Florida built for this. Subsection (1) lets a person who has established Florida residency file with "the office of the clerk of the circuit court for the county in which the said person shall reside" a sworn statement "showing that he or she resides in and maintains a place of abode in that county which he or she recognizes and intends to maintain as his or her permanent home."

Subsection (2) is the one that fits this corridor, and it is the one to read closely if the Connecticut house is staying. It applies to a person with an established Florida domicile who "shall maintain another place or places of abode in some other state or states," and it requires the declaration to state that the Florida abode "constitutes his or her predominant and principal home, and that he or she intends to continue it permanently as such." Predominant and principal. That is a sworn statement about relative use, filed in a Florida courthouse, and it is directly contradicted by a five and a half month Connecticut season. Daniels had a 2006 declaration on file. It did not survive the calendar.

The homestead exemption is the other one, and the Florida Department of Revenue’s own guidance shows why it is the better piece of evidence. The exemption is worth up to $50,000: the first $25,000 applies to all property taxes including school district taxes, and the additional exemption of up to $25,000 "applies to the assessed value over $50,000 and only to non-school taxes" under section 196.031, Florida Statutes, adjusted annually on January 1 for positive CPI changes. To get it for a tax year you must own the property and make it your permanent residence by January 1, and file Form DR-501 with the county property appraiser by March 1 of the tax year.

What makes it evidence is the questionnaire, not the money. First-time applicants are told to be prepared to answer whose name was on the title on January 1, whether they or their dependents were living in the dwelling on January 1, and, in the department’s own words, "Do you claim residency in another county or state?" The property appraiser may then ask for "Proof of previous residency outside Florida and date ended," "Evidence of giving up driver license from another state," the Florida license or identification card number, the Florida vehicle license plate number, the Florida voter registration number, the "Declaration of domicile and residency date," the current employer’s name, the address on the last IRS return, dependent children’s school locations, a bank statement and checking account mailing address, and proof of utility payments at the homestead address. You also lose eligibility if the unit is rented, if it is no longer your permanent home, or if you are no longer a permanent Florida resident.

That is a government body forcing your Connecticut end date, your Connecticut license surrender and your Connecticut vehicle registrations to agree with each other, in writing, at a fixed date. There is no Connecticut-side counterpart to surrender, because unlike New York’s STAR exemption Connecticut has no statewide homestead exemption or rebate program; the property tax relief that exists is municipal and aimed at veterans, elderly and disabled homeowners. So there is no Connecticut benefit whose continued receipt contradicts you, which removes one classic New York trap and, at the same time, removes one easy piece of proof. The Florida filings have to carry more weight here than they do on the New York corridor.

The rest of the Florida checklist is a set of short deadlines worth hitting on time precisely because the dates become evidence: the Florida driver’s license within 30 days of establishing residency, vehicle registration and Florida auto insurance within 10 days, and voter registration at least 29 days before the election you intend to vote in.

Connecticut’s assessment window under Conn. Gen. Stat. section 12-733 tracks New York’s closely. The general rule is that "a notice of proposed deficiency assessment shall be mailed to the taxpayer within three years after the return is filed." Where the taxpayer omits an amount exceeding 25 percent of the income stated on the return, "a notice of a proposed deficiency assessment may be mailed to the taxpayer not later than six years after the date on which the return is filed." And the open-ended case is stated without qualification: "If no return is filed or if a taxpayer makes, wilfully or otherwise, a false or fraudulent return, a notice of deficiency assessment may be mailed to the taxpayer at any time."

Read that last sentence against the most common behavior on this corridor. Someone moves to Florida in June, assumes the move settles it, and simply stops filing in Connecticut. They have not ended their exposure. They have made it permanent, because no return means no limitations period, in a state where the domicile question can be reopened in a post-death estate tax audit years later.

The correct move is to file. Form CT-1040NR/PY, the Connecticut Nonresident and Part-Year Resident Income Tax Return, covers both a part-year resident leaving the state and a nonresident with Connecticut-source income, and filing it is what starts the three-year clock on the move year and on every year after it in which Connecticut-source income continues. Collection runs on a separate track: per our Connecticut residency guide, a 2022 change in Public Act 22-117 gives DRS ten years to collect a liability once assessed, running from the filing date for a self-reported liability or from finality for an assessed one.

One honest note about this corridor. Connecticut does not publish an audit duration figure comparable to New York’s guidance, and no practitioner has published a standard Connecticut residency audit defense cost range, so anyone quoting you a precise number for either is estimating. What is documented is the rest of it: the burden on you, the twenty-eight factors, the five-month time split that produced a $13 million assessment, and a limitations period that never expires if you never file.

Decide early whether you are running the 30-day rule or the domicile argument, because they demand opposite things. The 30-day rule requires no Connecticut abode at all for the entire year, an abode elsewhere for the entire year, and 30 or fewer Connecticut days, and it delivers nonresidency without a domicile fight. If you are keeping the house, the 30-day rule is off the table and everything below applies.

If the Connecticut house is staying, make it stop being a permanent place of abode on purpose, by the regulation’s own terms. That means a lease of at least one year, to a tenant unrelated to you or your spouse by blood or marriage, with no right reserved for you to occupy any portion of the premises, and with your mail moved off that address for the whole lease term. A casual summer rental to a cousin does none of this.

Fix the time split before you fix the paperwork. Item (W) measures Connecticut presence against every other jurisdiction excluding employment hours, and five and a half Connecticut months against three and a half Florida months is the fact pattern that lost Daniels despite twenty years of Florida filings. Florida should be the plurality, not the runner-up, and the count should exist as a record you kept rather than one you reconstruct.

Move the cars, not just the plates. Item (M) asks where the vehicles physically are, and a Connecticut registration also generates a municipal motor vehicle tax bill in your name at a Connecticut address every year.

File the Florida side on its deadlines and read what you are signing. The section 222.17(2) declaration asserts that Florida is your predominant and principal home, so file it in a year in which that is true. Own and occupy by January 1 and file Form DR-501 by March 1 for the homestead exemption, surrender the Connecticut license, and be ready for the appraiser to ask for proof of previous residency outside Florida and the date it ended.

Then keep filing in Connecticut. File Form CT-1040NR/PY for the move year, file for Connecticut-source income after it, and do not let a nonfiled year sit open forever. And if a business sale, an option exercise or a large lifetime gift is anywhere near the move, sequence the transaction and the domicile date deliberately, because Connecticut taxes capital gains as ordinary income, applies its gift tax to a resident’s transfers of intangibles wherever located, and audits departures that follow liquidity events at higher rates than departures that do not.

The Mobility Map records days and nights by state as they happen. On this corridor the count that matters is not only Connecticut days against 183 for the abode prong; it is Connecticut presence as a share of the year against Florida and everywhere else, because regulation item (W) is a comparison, not a threshold, and it is the factor Connecticut actually won on in Daniels.

Evidence Vault holds what a Connecticut domicile audit asks for: the lease on the Connecticut house with its term, tenant and occupancy terms visible, the mail redirection, the closing documents if you sold, the Florida declaration of domicile with its recording date, the DR-501 homestead approval, the Florida driver’s license with the Connecticut surrender evidence, the Florida vehicle registrations, the Florida voter registration, and the Form CT-1040NR/PY for the move year and every year after.

AuditIQ surfaces the contradictions this corridor produces most often: a Connecticut house kept without an arm’s-length one-year lease, Connecticut presence running ahead of Florida presence, vehicles still registered in Connecticut, a Connecticut mailing address still in use after a filed declaration of domicile, and a move year with no Connecticut return filed at all.

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 full text of Conn. Agencies Regs. section 12-701(a)(1)-1 quoted throughout this article is the source of the warning that an individual may be a Connecticut resident for income tax purposes "even though he or she would not be deemed a resident for other purposes," both prongs of the resident definition, the three-condition 30-day rule in subsection (b) and the Connecticut domiciliary’s burden of demonstrating it, the rule that "a day spent within Connecticut includes any part of a day, except for a part of a day during which an individual is present solely while in transit to a destination outside Connecticut," the requirement that a nonresident with a Connecticut abode "shall have records available for examination by the Department to substantiate the fact that such individual spent 183 days or less within Connecticut," the definition of domicile and the sentence that "the burden is upon an individual asserting a change of domicile to show that the necessary intention existed," the warning that no change of domicile results from a removal intended to last only a limited time even if the former home was sold, the twenty-eight lettered domicile factors including (G) the present status of former living quarters, (M) motor vehicle registration and "the actual physical location of the vehicles," (W) percentage of time excluding hours of employment, and (BB) "location where pets are licensed," the limits that no single item determines domicile and that charitable contributions are not considered, and the full "permanent place of abode" definition with the one-year arm’s-length lease carve-out, the vacation camp or cottage exclusion, the barracks and motel exclusion, and the fixed-and-limited versus indefinite employer assignment example: https://eregulations.ct.gov/eRegsPortal/Search/getDocument?guid=%7B52408D86-977F-4BF8-97A7-2477CBAF2834%7D. A secondary presentation of the same regulation is at https://www.law.cornell.edu/regulations/connecticut/Regs-Conn-State-Agencies-SS-12-701-a-1-1.

The statutory definition the regulation implements is Conn. Gen. Stat. section 12-701: https://codes.findlaw.com/ct/title-12-taxation/ct-gen-st-sect-12-701/.

Connecticut’s convenience of the employer rule at Conn. Gen. Stat. section 12-711(b)(2)(C), quoted here in full, along with the nonresident sourcing rule in subsection (b)(2)(A) reaching "compensation paid to a nonresident natural person for rendering personal services as an employee in this state" and the 15-day de minimis threshold for a nonresident employee’s Connecticut work compensation, is at https://codes.findlaw.com/ct/title-12-taxation/ct-gen-st-sect-12-711/. The 2019 enactment of the reciprocal rule and the identification of New York, Pennsylvania, Delaware and Nebraska as the convenience-rule states whose residents it reaches are discussed at https://legalclarity.org/connecticuts-convenience-of-the-employer-rule/ and https://www.cpajournal.com/2023/08/16/an-inconvenient-truth-about-remote-work-2/.

The New York comparison points are N.Y. Tax Law section 605(b)(1), which supplies the statutory residency language "who maintains a permanent place of abode in this state and spends in the aggregate more than one hundred eighty-three days of the taxable year in this state, whether or not domiciled in this state for any portion of the taxable year" and the two domicile safe harbors, the second of which requires 450 days in a foreign country within a 548-day period: https://www.nysenate.gov/legislation/laws/TAX/605.

Daniels v. Commissioner of Revenue Services, SC 21150, decided June 16, 2026 and reported at 354 Conn. 768, is the source of the decedent’s homes in Connecticut, Florida and Arizona, the roughly five and a half months a year in Connecticut from May to mid-October against about three and a half months in Florida and three months in Arizona, the 2006 Florida declaration of domicile, Florida driver’s license, Florida voter registration and Florida bank account, the four Connecticut-registered vehicles, the DRS assessment of more than $13 million in estate tax, the rejection of the clear and convincing standard in favor of preponderance of the evidence, the reasoning that domicile "turns on a decedent’s subjective intent and the unique facts and circumstances of his or her life," the de novo character of a Superior Court appeal, the remand for a new trial, and the holding that "decedents are presumed by statute to be Connecticut residents, and the ultimate burden of overcoming that presumption remains on a decedent’s estate." The two firm analyses relied on here are Shipman and Goodwin at https://www.shipmangoodwin.com/insights/historic-connecticut-supreme-court-decision-softens-the-burden-of-proof-in-estate-tax-domicile-disputesbut-significant-questions-remain.html, which reports the assessment as $13.2 million, and Cummings and Lockwood at https://www.cl-law.com/news-events/connecticut-supreme-court-clarifies-standards-governing-estate-tax-domicile-disputes. The decision is indexed at https://law.justia.com/cases/connecticut/supreme-court/2026/sc21150.html.

The 2026 Connecticut estate and gift tax exemption of $15 million, the flat 12 percent rate above it, the aggregate cap that "the aggregate amount of Connecticut gift and estate tax payable shall not exceed $15 million" for calendar years beginning on or after January 1, 2019, the application of the Connecticut gift tax to federal taxable gifts "made by a resident or nonresident of Connecticut on or after January 1, 2005," and the resident-versus-nonresident scope of taxable gifts including intangible personal property wherever located for residents and only Connecticut real or tangible property for nonresidents, are from the Department of Revenue Services: https://portal.ct.gov/drs/individuals/individual-income-tax-portal/estate-and-gift-taxes/tax-information.

The Connecticut limitations periods quoted here, three years from filing, six years where the taxpayer omits an amount exceeding 25 percent of the income stated on the return, and assessment at any time where no return is filed or a false or fraudulent return is filed, are in Conn. Gen. Stat. section 12-733: https://codes.findlaw.com/ct/title-12-taxation/ct-gen-st-sect-12-733/.

The municipal motor vehicle mill rate cap of 32.46 mills "for the assessment year commencing October 1, 2021, and each assessment year thereafter" is in Conn. Gen. Stat. section 12-71e: https://codes.findlaw.com/ct/title-12-taxation/ct-gen-st-sect-12-71e/.

The five working domicile factors Connecticut practitioners distill from the regulation, an analysis of your homes, your business ties in the states involved, an analysis of the items considered near and dear to you, your family connections, and the time you spend in each location, together with the statement that "the burden of proof when asserting a change in domicile is yours," are from Juliano and Marks, LLC: https://www.jmattys.com/article-so-you-think-you-are-a-florida-resident.

The migration figures, that Connecticut "lost 9,966 people (or 38% of the population loss from all states) to the Sunshine State" and "lost 6,467 people ... on net to 40 other states" in the IRS state-to-state data for the 2021 to 2022 tax year, are from the Yankee Institute’s analysis at https://www.yankeeinstitute.org/2024/07/15/ct-lost-population-income-in-new-irs-migration-trend-report/. The underlying IRS data is at https://www.irs.gov/statistics/soi-tax-stats-migration-data-connecticut.

Florida’s declaration of domicile, including the subsection (1) sworn statement that the filer "resides in and maintains a place of abode in that county which he or she recognizes and intends to maintain as his or her permanent home," and the subsection (2) requirement for a filer who maintains abodes in other states to declare that the Florida abode "constitutes his or her predominant and principal home, and that he or she intends to continue it permanently as such," is Fla. Stat. section 222.17: https://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0200-0299/0222/Sections/0222.17.html.

The Florida homestead exemption mechanics quoted here, the first $25,000 applying to all property taxes including school district taxes and the additional up-to-$25,000 applying to assessed value over $50,000 "and only to non-school taxes" under section 196.031, Florida Statutes, with the annual January 1 CPI adjustment, the January 1 ownership and permanent residence requirement, the March 1 Form DR-501 filing deadline, the first-time applicant questions including "Do you claim residency in another county or state?", the appraiser’s proof list including "Proof of previous residency outside Florida and date ended" and "Evidence of giving up driver license from another state," and the loss of eligibility if the unit is rented or is no longer your permanent home, are from the Florida Department of Revenue’s PT-113: https://floridarevenue.com/property/documents/pt113.pdf.

The Connecticut rate structure of seven brackets from 2 percent to 6.99 percent with the top rate applying above $500,000 for single filers and $1,000,000 for joint filers, the benefit recapture provision and personal exemption phase-out, the taxation of capital gains as ordinary income with no preferential rate, the absence of any statewide Connecticut homestead exemption or rebate program comparable to New York’s STAR, the DRS practice of auditing Connecticut to Florida movers at high rates and attending to departures following liquidity events, the ten-year collection period added by Public Act 22-117 amending section 12-35, the absence of any published Connecticut audit duration or defense cost figure, and the Form CT-1040NR/PY filing path, are from our Connecticut residency guide, which cites https://portal.ct.gov/drs, https://portal.ct.gov/drs/individuals/nonresident-part-year/tax-information and https://www.cga.ct.gov/2020/rpt/pdf/2020-R-0039.pdf.

The absence of any Florida statutory residency test, day-count threshold or state residency audit, the 30-day Florida driver’s license deadline, the 10-day vehicle registration deadline, the 29-day pre-election voter registration requirement, and the framing of Florida residency as mattering for homestead, probate and asset protection rather than as an income tax trigger, are from our Florida residency guide, which cites https://www.flhsmv.gov/new-resident/, https://registertovoteflorida.gov/ and https://floridarevenue.com/property/documents/pt113.pdf.