Making Florida Your Primary Residence: What Actually Survives a Tax Audit

August 15, 2026

Buyers moving to Miami from New York, New Jersey, Illinois or California almost always arrive with the same piece of received wisdom: spend six months and a day in Florida and the tax problem solves itself.

It is one of the most confidently repeated and least accurate things said about relocating to Florida. Understood incorrectly, it produces exactly the outcome it was supposed to prevent, which is a residency audit two or three years later with a substantial assessment attached. The mechanics are not complicated, but they are not intuitive either, and the difference between doing this well and doing it casually is measured in real money.

Florida has no day count. Your old state does.

Start here, because everything else follows from it.

Florida imposes no minimum number of days to establish residency. There is no 183-day test to satisfy, no threshold to cross, no state form that grants you tax residency. Florida has no state income tax, so it has no reason to count your days at all.

The 183-day rule belongs entirely to the state you are leaving. It is a tool high-tax states use to keep taxing people who claim to have left. New York, New Jersey, California and Illinois all apply their own tests to departing residents, and those tests are what determine whether your move worked.

This is why so many people get it backwards. They spend the year chasing a Florida threshold that does not exist while ignoring the New York test that still very much applies to them.

The statutory residency trap

This is the mechanism that catches the most people, including people who have done the domicile work properly.

Under New York’s rules, you can be taxed as a full New York resident regardless of where you are domiciled if two conditions are both met: you maintain a permanent place of abode in New York for substantially all of the tax year, and you spend more than 183 days physically present in New York. Trip both prongs and New York taxes your worldwide income as a resident, even with a perfect Florida domicile file.

Several details matter enormously here.

A permanent place of abode is any dwelling suitable for year-round living that you maintain. Ownership is not required. A pied-à-terre kept in your name qualifies. A family member’s apartment you have unrestricted access to may qualify. Transferring the property to a trust while keeping the keys generally does not solve the problem. The “substantially all of the year” standard has been tightened in recent guidance from eleven months to ten.

And the day count is brutal in its simplicity. Any part of a day in the state generally counts as a full day. Land at LaGuardia at 11:55pm and leave at 5am the next morning and you have used two days. Travel days count. Driving through counts.

This is why business travellers get caught. Someone Florida-domiciled who flies to New York for meetings three or four days a week for forty weeks of the year has comfortably exceeded 183 days without ever thinking of themselves as living there.

The clean solution, where it is practical, is to dispose of the abode. Selling the New York property eliminates the permanent place of abode prong permanently, and with it the statutory residency exposure regardless of how many days you spend in the state.

What auditors actually look at

Separately from the day count, there is the domicile question, which is about where your primary home genuinely is. New York’s auditors work through a set of primary factors, and understanding them tells you exactly what to build.

The home itself. Auditors compare the two residences directly. If the northern house is larger, more valuable and better appointed than the Florida one, that comparison weighs heavily against you regardless of what you have declared. This is the factor most relevant to a property purchase, and it is why buying a serious home in Miami rather than a modest one is not only a lifestyle decision.

Active business involvement. Where is the work being done, and where are the decisions being made.

Time. Not just the count, but the pattern. Where does ordinary life happen.

Family connections. Where the spouse and school-age children are located carries real weight.

Near and dear items. Where you keep the things that are irreplaceable to you. Family photographs, heirlooms, art, the possessions you would carry out of a burning building. Auditors ask about this specifically, and the answer is revealing precisely because most people never think to manage it.

No single factor decides the case. Auditors build a chart and see which way the pattern points. A clear, consistent picture across every factor produces a short audit. A mixed picture invites a multi-year examination.

The paperwork, and the clock on it

There is a standard sequence, and the timing of it matters more than most people realise. Doing everything within a tight window around your move date creates a coherent story. Doing pieces of it scattered across eighteen months does not.

File a Declaration of Domicile under Florida Statute §222.17 with the clerk of the circuit court in your county. It is a sworn statement of intent, it creates dated evidence, and it costs very little. It is also worth being clear about what it is not: a declaration unsupported by an actual change in where you live does not establish domicile, and an auditor will defeat a paper-only claim by pointing at where daily life actually happened.

Obtain a Florida driver’s licence within 30 days of establishing residency, as Florida law requires, and surrender the out-of-state one. Register your vehicles. Register to vote in Florida and cancel the prior registration, then actually vote. File Form 8822 with the IRS. Update the address on every financial account, insurance policy, brokerage statement and credit card.

That last one is where files fall apart. If a year after your claimed move date your bank statements, investment accounts and insurance still point to a New York address, the auditor will notice, and it undermines everything else you have done.

Then there is the softer layer: moving professional relationships to Florida, changing doctors and dentists, transferring club and religious memberships, joining local organisations. These are examined last and they rarely decide a case on their own, but in a close call they tip it, and most of them cost nothing.

Apply for the Florida homestead exemption on your new home. It delivers a direct property tax benefit in its own right, and it is also among the strongest single pieces of residency evidence available, because it requires you to affirm the property is your permanent residence.

Why the calendar matters this year in particular

There is a specific reason to have this conversation in 2026 rather than putting it off.

Amendment 3 goes before Florida voters on November 3, 2026. If approved, it would substantially increase the homestead exemption against non-school millage, phasing in during 2027 and 2028. As drafted, people who are permanent Florida residents as of December 31, 2026 would be eligible for the full phased amounts, while those establishing residency on or after January 1, 2027 would begin at a lower new-resident exemption and step up only after maintaining a Florida homestead for several years.

The amendment may not pass, and nobody should reorganise their affairs around a ballot measure. But for someone already planning to relocate, the difference between establishing residency in December and doing it in February could be meaningful over a long ownership. That is a conversation to have with your CPA now, while there is still time to act on the answer.

Build the file as you go

The single best piece of practical advice on this subject is unglamorous: document the move as it happens rather than reconstructing it after an audit notice arrives.

Keep a contemporaneous day log. Retain travel itineraries, credit card statements and phone records that establish where you were. The first full calendar year after the move matters most, because it is the first complete year in which you can demonstrate a clear pattern. Some advisers deliberately time a move to January or February so that even the transition year shows a strong Florida preference.

Reconstructed evidence is weak evidence. Contemporaneous evidence usually ends the conversation.

The house is part of the argument

Most of this is a matter for your accountant and your attorney, and it should be. But one part of it is squarely a real estate question, because the property you buy is itself a primary piece of evidence.

The size, value and character of the Florida home relative to the one you are leaving is one of the factors auditors weigh most heavily. A buyer who purchases here with that in mind, and who understands how homestead status interacts with the rest of the file, is in a materially stronger position than one who treats the purchase and the tax planning as separate projects.

Chris King regularly works with buyers relocating from high-tax states, and coordinates with their CPAs and attorneys so the property decision supports the wider plan rather than complicating it. If you are planning a move to South Florida, let us talk early, while timing is still something you can choose.

This article is general information, not tax or legal advice. Residency and domicile rules are fact-specific and change; consult a qualified CPA or tax attorney in both your current state and Florida before acting.