Florida domicile: the complete guide to changing your tax residency

Florida has no state income tax, no state estate tax, and a generous homestead exemption. For a high-earner moving from New York, California, or New Jersey, Florida domicile can save 6–14% of income — five or six figures every year. But establishing domicile in Florida is not the same as buying a Florida house. Your old state will fight back, and they'll win if you don't do this correctly.

Domicile vs. residency in Florida

Florida itself doesn't really care about your day count — there's no income tax, so there's no test to fail. The fight is with your old state, which will use day counts and connection tests to argue you never really left.

To win that fight, you need to: (1) cut your old-state day count below their threshold, and (2) build a paper trail of Florida ties strong enough to survive an audit.

Establishing Florida domicile: the checklist

Florida grants domicile to people who declare it and back it up with action. The minimum credible package:

• Declaration of Domicile filed with the county clerk where your Florida home is located (sworn statement, ~$10).
• Florida driver's license with your Florida address (must surrender old state's license).
• Florida voter registration (and actually vote in Florida).
• Florida vehicle registration and insurance at the Florida address.
• Florida homestead exemption on your primary residence (saves ~$50,000 of assessed value, plus the 'Save Our Homes' cap).
• Florida bank accounts as your primary banking relationship.
• Florida professional services — primary doctor, dentist, accountant, attorney all in Florida.
• Florida wills, trusts, and powers of attorney updated to reflect Florida domicile.
• Florida mailing address for all bills, statements, and correspondence.

The day-count strategy

Florida domicile only sticks if you spend more time in Florida than in your old state. Aim for at least 183 days in Florida (more is better) and stay below 183 in your old state. For New York and New Jersey, the magic number is 183 or fewer — 184 makes you a statutory resident regardless of domicile.

• Florida days: aim for 183+. More is more defensible.
• Old-state days: aim for 165 or fewer. Don't risk hitting 184.
• Travel days: count what your old state counts. NY counts any part of a day; California does too.

What your old state will do

States lose serious revenue when high earners leave. New York, California, New Jersey, Connecticut, and Massachusetts have well-funded residency audit programs that target departing residents. Expect:

• A residency questionnaire 1–3 years after you file your first part-year return.
• A request for cell phone records, EZ-Pass, credit card statements, and travel itineraries.
• Scrutiny of every tie you kept — old apartment, country club membership, kids' school, doctors.
• Counter-claims that your Florida home is a 'second home' rather than your primary.

The audit can take 1–3 years. The defense is a contemporaneous day count plus a documented checklist of severed old-state ties.

Common Florida-domicile mistakes

• Keeping the old apartment. NY's permanent place of abode rule treats year-round access as enough. If you keep it, you may still be a NY statutory resident even after moving.
• Forgetting cell phone billing address. Auditors pull cell records first. If your phone bills go to NY, that's a tie.
• Spouse and kids stay behind. Where your spouse and minor children live is a major facts-and-circumstances factor.
• Working from your old-state office. Even one day a week in NY can become 50+ days a year.
• Not filing the Declaration of Domicile. It's $10 and creates a dated record. Skip it and you give up the easiest evidence.

Track it from day one

The window for proving Florida domicile is the year you move and the years after. Your contemporaneous day count is the foundation. Tax Days tracks Florida days, your old-state days, and projects exact thresholds — including the date you'd hit 184 in your old state if you stay.