Florida has no personal state income tax, making it the favorite landing spot for people leaving New York, California, New Jersey and other high-tax states. But establishing Florida residency for tax purposes is really two jobs: building a convincing Florida domicile file, and breaking residency in your old state under its own rules. The first is paperwork. The second is where six-figure audit bills happen, because your old state decides whether you really left - and it counts your days. Here is the Florida checklist, the 183-day trap, what auditors look for, and how to keep a provable day count on your phone.
Why Florida residency for tax purposes is two jobs, not one
The Florida side is the easy half. Florida's constitution bans a personal income tax outright, so there is no Florida return to file and no Florida day test to pass. What Florida offers is a set of official acts documenting your domicile - your one permanent home.
The hard half is your departure state, which presumes you are still its resident until you prove otherwise, usually by clear and convincing evidence. It runs two independent tests: a domicile test (did your permanent home genuinely move?) and a statutory residency test (did you keep a home there and spend too many days?). Fail either one and you are taxed as a resident on worldwide income, Florida paperwork or not.
The Florida domicile checklist
Domicile is intent plus action, so stack up official, dated acts that all point the same way:
- File a Declaration of Domicile. A sworn statement under Florida Statutes section 222.17, recorded with the clerk of the circuit court in your county - the clearest dated declaration that Florida is now your permanent home.
- Get a Florida driver's license and register your vehicles. New residents are expected to switch within 30 days; surrender the old license when you do.
- Register to vote in Florida - and actually vote there. Cancel your old registration.
- Claim the homestead exemption on the Florida home you own and occupy on 1 January, applying by 1 March. It removes up to $50,000 of assessed value, caps assessment growth at 3 percent a year under Save Our Homes, and, since only permanent residents qualify, it is strong domicile evidence.
- Move the infrastructure of your life: doctors, accountant, bank branch, insurance addresses, memberships, and a will drawn under Florida law. Give the IRS your new address (Form 8822) and use it on your federal return.
- Sever the old state's markers: drop resident tax perks like New York's STAR benefit and stop using the old address anywhere.
One 2026 change to watch: this November, Floridians vote on raising the non-school homestead exemption to $150,000 in 2027 and $250,000 in 2028. As drafted, anyone establishing residency after 1 January 2027 waits five years for the full amount - one more reason paperwork dates matter.
The real risk is your old state's audit
Nobody audits you into Florida. The audit comes from the state you left, on two fronts. On domicile, auditors run a closest-connections analysis: they compare the homes, where your spouse and children live, where the business is really run, where your doctors, advisers and even pets are. They say openly that a new license and voter card alone will not carry the day.
On statutory residency, the day count takes over. New York taxes you as a statutory resident if you maintain a permanent place of abode for substantially all of the year and spend 184 days or more in the state, even with genuine Florida domicile. New Jersey works the same way at more than 183 days with a permanent home. California has no single bright line: more than nine months there creates a presumption of residency, and beyond a roughly six-month visiting pattern it weighs your closest connections. The working rule: establish Florida domicile and keep old-state days at or under its statutory line, with margin.
Expect forensics: cell phone location records, credit card statements, EZ-Pass and toll data, flight histories and building swipe logs, with you accounting for every day. The burden of proof sits on you, and undocumented days are resolved against you. For a high earner, a three-year New York audit can top $300,000 before interest and penalties. See how to prove tax residency for an audit for the evidence playbook.
Counting days: any part of a day counts
In most states, including New York, any part of a day counts as a full day. Land at 11:58 pm and that is a day. A Friday-to-Sunday visit is three days, so twenty such weekends is sixty. And a travel day can count in two places at once: the day you fly from Florida to New York is a Florida day and a New York day.
- The kept apartment is the trap. Retain a usable home in the old state and the statutory test stays live every year. Sell it or genuinely give it up, such as a long-term lease to a third party.
- Exceptions are narrow. New York excuses little beyond days purely traveling through the state between two outside points and days confined to a hospital.
- Build a buffer. Treat 183 as a cliff edge, not a budget. Many advisers suggest keeping old-state days nearer 140 to 160, since a few forgotten day-trips can erase a thin margin.
Track the move automatically on your iPhone
A Florida move stands or falls on a day count you can prove. That is exactly what Tax Residency Tracker automates:
- Automatic state detection uses GPS with background monitoring to log which US state you are in and create dated stays, even with the app closed - no day depends on memory.
- Per-state statutory thresholds show a live count and days remaining for each state, so you can watch New York's line while your Florida total grows.
- Threshold alerts notify you before you cross a statutory line, so an extra trip back never tips you over.
- Dated location history is the contemporaneous, day-by-day record auditors credit most.
- Attach documents to stays so the lease, utility bills and tickets sit pinned to the exact dates they support.
- CSV export of stays and days hands your accountant, or an auditor, a clean evidence package in minutes.
- Everything stays on your device, private by design - your location history is yours until you choose to share it.
Frequently asked questions
How long do I have to live in Florida before I am a resident?
None. Domicile is intent plus action and can begin the day you arrive. The day counts that matter belong to your old state, which is why most movers still spend most of the year in Florida.
If I spend 183 days in Florida, am I automatically safe?
No. Florida has no day requirement, and your old state runs its own tests. A big Florida count helps the domicile story, but your connections must move and your old-state days must stay under its statutory line.
What does the Declaration of Domicile actually do?
A sworn, recorded statement under Florida Statutes section 222.17 that Florida is your permanent home. It is powerful dated evidence of intent but never works alone: auditors weigh it against where you actually lived, worked and spent your days.
Do I still file anything in my old state after moving?
Usually yes. File a part-year resident return for the move year, then nonresident returns if you keep income sourced there, such as wages for in-state workdays, rental property or a business. Filing correctly is itself evidence the move was real.
Leaving a specific state? Read the New York 183-day rule and the California 183-day rule next, see how to track US state residency in one place, or browse all guides.