The Greenwich-to-Palm Beach corridor is one of the oldest and best-trodden tax migration routes in the country. For decades, Fairfield County hedge fund managers and Connecticut Gold Coast families have been making the move south — establishing Florida domicile, keeping the Greenwich house for summers, and saving meaningful money along the way.
What has changed in the last few years is the volume. Post-pandemic remote work, rising Connecticut tax rates at the federal level following SALT cap changes, and growing financial-services industry presence in Palm Beach have accelerated the flow significantly. And Connecticut’s Department of Revenue Services has responded with a level of audit attention that catches first-time movers off guard.
Here’s what the Connecticut-to-Florida move actually saves, what the state will do about it, and what you need to do to make it stick.
What You Actually Save
Connecticut’s top marginal income tax rate is 6.99%, applied to taxable income above approximately $500,000 for single filers and $1 million for married joint filers. The state does not have a New York-style millionaire’s bracket, but the rate hits earlier than most people realize, and it applies broadly — to wages, business income, capital gains, dividends, and interest alike.
Florida’s income tax rate is 0%.
At meaningful income levels, the spread looks like this:
| Annual Income | Connecticut Tax (est.) | Florida Tax | Annual Savings |
|---|---|---|---|
| $500,000 | ~$30,000 | $0 | ~$30,000 |
| $1,000,000 | ~$65,000 | $0 | ~$65,000 |
| $2,000,000 | ~$135,000 | $0 | ~$135,000 |
| $5,000,000 | ~$345,000 | $0 | ~$345,000 |
These are estimates. The real numbers depend on your specific composition of income, deductions, pass-through entity structures, capital gains characterization, and other factors. But the order of magnitude is right — and for income that is heavily investment-oriented, where Connecticut would otherwise tax dividends, interest, and capital gains at the same flat 6.99%, the savings are close to the full spread.
Then there is the Connecticut estate tax. As of 2025, the Connecticut exemption matches the federal exemption (around $13.99 million per individual). For estates below that threshold, the estate tax is not the driver. But Connecticut is one of only a handful of states with both an estate tax and a gift tax, and the top rate is 12%. For estates above the exemption, that is a meaningful additional consideration on top of the income tax math.
Florida has no state estate tax and no state gift tax.
What Connecticut Does About It
Connecticut’s Department of Revenue Services (DRS) does not have a dedicated nonresident audit bureau on the scale of New York’s, but it does run an active and increasingly sophisticated residency examination program. As more high earners have moved to Florida, DRS has invested in the program — and the audit experience has become more rigorous.
The state has institutional reasons to take this seriously. Connecticut depends heavily on a small number of high earners for state revenue. The departure of one nine-figure household can move the budget needle. Connecticut auditors know which families have left, which kept Connecticut property, and which are likely worth examining.
What They Look For
The foundation of any Connecticut residency audit is the same question that anchors every state’s program: where were you, day by day, during the tax year?
To build that record, Connecticut auditors use the same playbook every other state has been refining for the last fifteen years:
Cell phone records. Subpoenaed from carriers, these records place your phone in a specific tower zone for every day of the year. If you claimed Florida residency but your phone was connecting to towers in Stamford on Tuesdays, that’s documented.
EZ-Pass records. Every toll passage on Connecticut highways, the New York State Thruway, the Mass Pike, and the New Jersey Turnpike is logged with a timestamp. Frequent Merritt Parkway tolls don’t fit a Florida residency story.
Credit and debit card transactions. Each purchase is timestamped and geolocated. A weekly grocery run at the Greenwich Whole Foods is a documented Connecticut day.
Property records. If you kept the Greenwich house, the state knows. Property tax records are public and trivially searchable. The same applies to vehicle registrations — if your cars are still registered in Connecticut, that’s a fact in the audit file before you sit down.
Club memberships. Country clubs, yacht clubs, social clubs in Greenwich, Darien, New Canaan, and Westport have membership lists. Auditors can and do request information about active members, dining records, and event attendance.
Children’s schooling. If your kids are still enrolled at Greenwich Country Day, Brunswick, Greens Farms Academy, or any other Connecticut school, that is a significant connection. Auditors look at whether children remain in Connecticut schools, whether tuition is paid from a Connecticut bank account, and what address is on file with the school.
Doctor and dentist visits. Routine medical care in Connecticut, especially with long-standing local providers, is treated as evidence that Connecticut remains the center of your life.
The standard statute of limitations is three years, extending to six for substantial underreporting. Connecticut, like New York, can and does extend the period of review when the case warrants it.
The Statutory Resident Trap
Like New York, Connecticut has two separate tests for residency. The first is the domicile test — your permanent home, your legal residence, the place you intend to return to. Establishing Florida domicile means you are no longer a Connecticut domiciliary.
But Connecticut also has a statutory resident test. Under this rule, you can be taxed as a full Connecticut resident even if your domicile is Florida, if both of the following are true:
- You maintain a permanent place of abode in Connecticut — a home, condo, or other dwelling that is available for your use.
- You spend more than 183 days in Connecticut during the tax year.
Notice that under this test, your domicile is irrelevant. If you keep the Greenwich house and spend 184 days in Connecticut, you owe Connecticut tax as a statutory resident — even with unambiguous Florida domicile and even with 181 days in Palm Beach.
This is the most common trap for Connecticut-to-Florida movers. People successfully establish Florida domicile on paper but underestimate how much time they actually spend at the Connecticut house — especially during summers, when the Florida humidity sends them north and the Connecticut social calendar fills up.
If you keep Connecticut property, the day count is not optional. It is the load-bearing piece of the whole strategy.
The Convenience-of-the-Employer Issue
Connecticut has its own version of the convenience-of-the-employer rule, adopted in 2019 in response to New York’s longstanding doctrine. The Connecticut rule is reciprocal: it applies only when the other state in question (typically New York) has a similar rule.
In practice, this matters most for Connecticut residents who work remotely for Connecticut employers but live or claim residency in another state. For Connecticut-to-Florida movers, the more common issue runs the other direction — many Greenwich residents work for New York-based employers and commute, or worked remotely during the pandemic and continued in some form.
For those individuals, New York’s convenience-of-the-employer rule is the bigger concern, not Connecticut’s. If you have a New York employer and now work from Florida, New York may continue to tax that income as if you were working in New York, regardless of where you actually sat. This is a rule that has surprised many financial-services professionals who moved south expecting full income tax relief from the salary side of their compensation.
The convenience rule does not generally apply to investment income, capital gains, or income from a Florida-based business or fund. But for wage income tied to a New York employer, it remains a significant qualifier on what the move actually saves.
The Connecticut House You Want to Keep
The hardest case in Connecticut-to-Florida planning is the family that genuinely loves their Connecticut home and is not prepared to sell it. For Fairfield County families with deep roots — multi-generational property, neighborhood ties, schools the kids still attend, summer routines around the Long Island Sound — selling isn’t on the table.
You are allowed to keep a Connecticut home as a Florida resident. There is no rule that says you must sell. But keeping it creates two distinct problems.
First, it provides the permanent place of abode that triggers the statutory resident analysis. Your Connecticut day count becomes a tax-relevant number.
Second, it complicates the domicile analysis. Connecticut auditors will look at the comparative facts of your Greenwich home and your Florida home: size, value, length of ownership, where the family’s significant possessions are kept, where major events and holidays are celebrated, where you sleep most nights. If the Connecticut home is the family home in every meaningful sense and the Florida home is the smaller condo you bought two years ago, the comparison is not flattering.
If you keep the Connecticut property, a few things matter:
Make the Florida home unambiguously the primary residence. It should be larger, better-furnished, and the place where the family’s significant belongings — art, valuables, family photos, important documents — actually live.
Treat the Connecticut home as the secondary residence. Keep it usable but not central. Don’t store irreplaceable items there. Don’t make it the place that contains the things that define your life.
Track your Connecticut days carefully. With a 183-day threshold for statutory residency, your margin is thinner than people realize once you account for summer visits, family events, and the gravitational pull of established friendships.
Get a specialist’s opinion before relying on the structure. Attorneys who specifically practice Connecticut and tri-state domicile law can model your specific risk profile and recommend structural changes — sometimes including which property to retain, which to sell, and how to title the remaining one.
The Practical Timeline
A Connecticut-to-Florida move executed for tax purposes is a months-long undertaking when done properly.
Day one: establish the Florida home. Before the paperwork starts, you need a real Florida address — owned or leased in your name. Not a family member’s house, not a rented week at the Breakers.
Early weeks: the paperwork layer. Florida driver’s license. Florida vehicle registration (move both your cars and your spouse’s). Voter registration in Florida and cancellation in Connecticut. Declaration of Domicile filed with your Florida county clerk. Address change with the Social Security Administration, the IRS, and your professional licensing bodies.
First few months: financial and professional. Update banking, brokerage, and financial accounts to your Florida address. Have your estate attorney update your will, trust documents, and powers of attorney to reflect Florida domicile and Florida law. Update health insurance to a Florida-based plan where practical.
First six months: the life layer. Find a Florida primary care physician, dentist, and other regular medical providers. Join a Florida club, civic organization, or church. Where practical, transfer or resign Connecticut-based memberships.
Throughout the year: the day count. From the moment you claim Florida residency, where you are physically located matters. Know your Connecticut day count, know your Florida day count, and know the gap between them. If you keep the Greenwich house, this is where the strategy is won or lost.
The file you build through this process — documented, dated, and corroborated — is the foundation of your defense if an audit comes three or four years later.
What This Move Is Not
It is worth being clear about what Florida tax residency does not do.
It does not eliminate Connecticut tax on Connecticut-source income. If you own rental property in Greenwich, run a Connecticut-based business, or earn wages from a Connecticut employer, you will still owe Connecticut nonresident tax on that income. What you eliminate is Connecticut’s claim on your non-Connecticut income — out-of-state investment returns, dividends from publicly traded companies, capital gains on the sale of investment securities, Florida business income.
For investment-heavy households whose income is principally portfolio-based, the savings are close to the full 6.99% gap. For households whose income is heavily tied to Connecticut business or rental activity, the picture is more complicated, and the actual savings may be a fraction of the gross rate differential.
This is where the conversation with a CPA and a tax attorney who understand both states matters before you make major decisions. The gross-rate math is appealing; the after-sourcing math is what actually shows up on your return.
A Note on the Greenwich Network Effect
A practical observation about the Connecticut-to-Florida corridor that is worth saying out loud: it has scale.
Palm Beach, Jupiter Island, Vero Beach, and increasingly Naples have absorbed enough Greenwich and Fairfield County families over the last twenty years that the move is socially well-trodden. Your accountant has done it for dozens of clients. Your attorney has done it for dozens of clients. Your country club friends have done it. The doctors, dentists, and private bankers you need are already there, often because they followed their clientele south.
This is not a small consideration. The hardest part of the move is not the paperwork — it is the social and lifestyle transition that comes with reorienting your life. The fact that the corridor is well-established means the practical friction is much lower than it would be for someone moving to a less-traveled tax destination.
It also means the audit risk is well-mapped. Both Connecticut and Florida know exactly what this migration pattern looks like. The mistakes people make are documented and predictable, and so is the documentation that defends the move successfully.
A Note on Consulting a Tax Professional
Everything above is general information. It is not tax or legal advice.
Connecticut domicile cases are fact-specific and high-stakes. The interaction between the domicile test, the statutory resident test, the convenience-of-the-employer doctrine, and the sourcing rules for Connecticut income requires careful analysis of your specific situation — including, frequently, simultaneous consideration of New York’s rules if you have any New York employment or business connection.
A CPA and attorney who specialize in Connecticut and tri-state domicile issues are worth their fees before you make moves. A failed Connecticut domicile challenge can mean years of back taxes, interest, and penalties that dwarf the cost of getting the planning right at the outset.
The day count, however, is something you should manage yourself. It is the most concrete and documentable part of the analysis — and it is the part most people handle poorly.
Where Southbound Fits
The single biggest practical failure in Connecticut-to-Florida tax moves is not the paperwork. Most people get the paperwork right, especially with a good attorney. The failure is the day count.
People claim Florida residency, live their lives, and then face an audit two or three years later with no reliable record of where they actually were. They reconstruct from old calendars, credit card statements, and texts to family members — an exercise that produces imprecise results and reads, accurately, as a retroactive story.
Contemporaneous, independent, GPS-verified records are the gold standard. They exist before any audit notice arrives. They aren’t constructed in response to a question. They’re hard to dispute.
Southbound does this passively. The app runs in the background on your iPhone, logging whether each day was a Florida day or a non-Florida day using iOS’s significant-location-change system. No manual check-ins. No daily diary entries. No discipline required beyond installing the app.
The dashboard’s central feature is the Departure Budget — one number that tells you exactly how many days you can still spend outside Florida and remain above 183 for the year. If you’re keeping the Greenwich house and need to watch your Connecticut day count against the statutory resident threshold, that number is the thing you need to be able to see at a glance.
When an audit notice arrives, you have a clean, exportable record of every day, backed by GPS data, stored in your own iCloud account. Southbound itself never holds your location history on its servers — there are no Southbound servers for location data. It’s private, it’s yours, and it’s the kind of documentation that ends most residency challenges before they become contested cases.
The cost of losing a Connecticut domicile audit is measured in years of back taxes, interest, penalties, and six-figure professional fees. The cost of starting your record today is downloading the app.
This post is for general informational purposes only and does not constitute tax or legal advice. Interstate domicile and residency planning involve complex, fact-specific legal questions. Work with a qualified tax attorney and CPA who specialize in Connecticut domicile issues.
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Published May 6, 2026