California's Proposed Wealth Tax Is Accelerating the Florida Exodus

California’s income tax situation was already among the worst in the country. The state’s 13.3% top rate — the highest of any state in the nation — applies to every dollar above $1 million with no ceiling. Capital gains are taxed as ordinary income at the same rate. A $10 million stock sale that the federal government taxes at 20% gets hit at 13.3% by California on top of that.

Now the California legislature is pushing proposals that would go further: a wealth tax on net worth, targeting assets rather than income, and in some versions taxing unrealized capital gains — paper gains you haven’t converted to cash. The proposals have stalled and revived in various forms, with thresholds ranging from $50 million to $1 billion in net worth. None has become law yet. But the direction of travel is clear, and the people with the most to lose are already reacting.

The result is a Florida exodus that was already large and is accelerating. If you’re a high-net-worth California resident who has been watching from the sidelines, this is the moment to understand what’s coming and what your options actually look like.

What California Is Proposing

The most prominent recent proposal would impose an annual 0.4% tax on net worth above $30 million for California residents. At that rate, a $100 million net worth would generate a $280,000 annual wealth tax bill — every year, regardless of whether those assets produced any income. A $500 million net worth generates a $1.88 million annual bill. A $1 billion net worth: $3.88 million, recurring.

A separate but related legislative thread has pushed for taxing unrealized capital gains at departure. The concept is that if you leave California with a portfolio of appreciated assets, California would assess a tax on the embedded gain at the moment of your departure — treating your move as a deemed sale. This is the so-called “exit tax” provision, and it is the one that has generated the most alarm in wealth management circles.

Neither proposal is currently law. California Governor Gavin Newsom has historically been cautious about dramatic departures from the income tax model, aware of the political and economic risks. But the proposals have recurred in multiple legislative sessions, they reflect the genuine preferences of a significant bloc of California lawmakers, and each iteration brings them closer to viability. The fiscal pressure California faces — recurring budget gaps, pension obligations, infrastructure needs — creates durable motivation to pass something eventually.

The question is not whether California will enact a wealth tax. The question is whether you want to be a California resident if and when it does.

The Exit Tax Problem

The most urgent reason to act before a wealth tax passes — rather than after — is the exit tax provision.

If California enacts a departure tax on unrealized gains, leaving California after the law takes effect could trigger an immediate, substantial tax bill on assets you haven’t sold. Appreciated stock, private equity interests, real estate, business stakes — any asset with embedded gain would be subject to assessment at the moment you establish domicile elsewhere.

This is not a hypothetical. Other countries with wealth taxes have used departure taxes as an enforcement mechanism, and the California legislature has explicitly studied these models. The logic from California’s perspective is straightforward: if wealthy residents are leaving to avoid a new tax, tax the exit. Create an incentive to stay — or at minimum, capture value before they go.

If you leave California before such a provision exists, you leave cleanly. You owe California tax on income earned through your departure date, California-sourced income going forward, and any unvested equity grants proportional to your California workdays. These are manageable, calculable liabilities.

If you leave after an exit tax is in place, your departure itself becomes a taxable event — potentially a very expensive one. For someone holding $50 million in appreciated stock with a $5 million cost basis, a 13.3% California tax on $45 million in unrealized gain is nearly $6 million, due at departure. That bill dramatically changes the economics of leaving, which is precisely its intent.

The window to leave without an exit tax is open. It may not stay open.

Who Has Already Left

The California-to-Florida migration among ultra-high-net-worth individuals is not new. What’s new is the scale and visibility.

Larry Page and Sergey Brin, Google’s co-founders, both relocated to Florida years ago. Page has an expansive compound in the Florida Keys. Their combined net worth is measured in the hundreds of billions of dollars. The California income tax savings on investment income at that scale are staggering — even before any wealth tax.

Peter Thiel, the venture capitalist and PayPal co-founder, relocated to Miami. Thiel has been explicit about his views on California’s tax and regulatory environment.

Ken Griffin made one of the highest-profile departures in recent memory when he moved Citadel’s headquarters from Chicago to Miami in 2022, taking hundreds of high-paid employees with him. Griffin cited Florida’s business environment, but the tax calculus was clearly part of it — Illinois has a flat income tax, not California’s, but Griffin subsequently established his personal domicile in Florida as well.

Carl Icahn relocated his investment firm from New York to Miami in 2020, citing taxes and business environment. He joined a growing community of hedge fund managers, private equity executives, and family offices that have established Miami as a genuine financial hub rather than a retirement destination.

These are not people who made impulsive decisions. They have teams of tax attorneys and advisors. They ran the numbers and concluded Florida was the right answer. The coming wealth tax proposals give everyone else a more urgent version of the same calculation.

The FTB: California’s Most Aggressive Tax Authority

If you’re considering leaving California, you need to understand what you’re dealing with on the other side of that decision.

California’s Franchise Tax Board is, by most accounts of tax practitioners who work in this space, the most aggressive residency audit program in the country — more thorough and more adversarial than New York’s, which is itself formidable. New York’s audit methodology focuses heavily on day counting. California combines day counting with an intent-based analysis that examines whether you truly left — or whether Florida is a legal construction while your real life remained in California.

California can and does subpoena cell phone tower records to reconstruct your physical location day by day. It analyzes credit card transaction patterns by geography. It requests iCloud data and device location history in contested cases. It reviews social media, news appearances, and professional records. It interviews people. It looks at where your art collection is, where your doctors are, where your attorney and accountant practice.

The FTB is not bound by the same degree of institutional restraint that shapes some other tax authorities. Former California residents describe audit processes that are comprehensive and adversarial — the burden, in practice, falls entirely on you to prove you left.

A wealth tax would do two things to this dynamic. First, it would increase the revenue at stake in residency determinations — making high-earner departures even more worth pursuing. Second, it would require the FTB to develop new infrastructure for tracking net worth and asset location, infrastructure that would simultaneously make the residency audit program more capable.

More tax revenue on the table plus better tools to go after it: this is not a combination that makes departures easier.

California’s Intent-to-Return Doctrine

What separates California from most states is the intent-to-return doctrine. Under this principle, you can be treated as a California resident even while physically outside California — if the FTB concludes your absence was temporary rather than a genuine change of domicile.

This is not a mechanical day-count test. California auditors look at the totality of your life: where your family lives, where your professional services are located, where your personal property sits, where your estate documents are governed, where you receive medical care. If the totality suggests California is still your home, the FTB will argue it is.

This doctrine matters especially for people who moved but retained close California connections — a family home, a business with California operations, professional relationships centered in the state. Those people are California’s primary targets because the facts are genuinely mixed. The FTB will make the argument that mixed facts equal continued residency.

For our more detailed breakdown of California’s residency rules, audit process, and step-by-step severance strategy, see our California to Florida Tax Guide.

Why Florida Specifically

When wealthy individuals leave California, they have options. Nevada is geographically closer. Texas is large, business-friendly, and has no income tax. Wyoming and South Dakota have essentially no state tax and no residency audit program worth mentioning. So why does Florida keep winning?

No Income Tax, No Estate Tax, No Wealth Tax

Florida has no state income tax, no estate tax, and no gift tax. It has no wealth tax and there is no serious political movement to create one. The state constitution makes income tax enactment particularly difficult — it would require a constitutional amendment. This provides a structural durability that pure legislative policy does not.

California’s capital gains rate at the state level is 13.3%. Florida’s is zero. For someone holding a large, long-held investment portfolio, liquidating assets from a Florida domicile rather than a California one is one of the largest legal tax planning opportunities available to individuals in the United States.

Homestead Asset Protection

Florida’s homestead exemption provides some of the strongest creditor protection for primary residence equity of any state in the country. There is no cap on the value of the homestead protected from creditors in most circumstances. For ultra-high-net-worth individuals who worry about litigation exposure alongside tax exposure, this is a meaningful benefit layered on top of the tax picture.

International Access and Infrastructure

Miami has become a serious financial city, not just a tax destination. It has direct flights to every major city in Latin America and Europe, substantial hedge fund and private equity presence, a growing venture capital ecosystem, and a concentration of family offices and wealth management infrastructure that makes professional service provider transitions realistic. You can find a world-class estate attorney, a sophisticated CPA who knows interstate domicile, and a financial advisor of any caliber in Miami today in a way that was not true a decade ago.

For people who made their wealth through financial markets or technology, Miami’s professional ecosystem is functional at the level their work requires.

Established Community

This matters more than people expect. The FTB’s intent-based analysis rewards genuine integration into Florida life — joining organizations, establishing medical care, building community. Miami’s large population of relocated high-net-worth individuals from California, New York, and internationally means you are not building a social and professional network from scratch. The community already exists.

That same community — visible, documented, active — is also the best evidence to put in front of an FTB auditor arguing you never really left.

The Practical Reality: The FTB Will Come for You

If you earn significant income and leave California, the FTB will almost certainly audit you. This is not speculation. Former California residents with substantial incomes describe it as a near-certainty when the move produces a material revenue loss for the state.

A California wealth tax would make this worse. At current wealth levels, the departures of a handful of billionaires represent hundreds of millions of dollars in annual tax revenue. California has an enormous financial incentive to challenge those departures, prove they failed legally, and collect the back taxes. With a wealth tax, the per-departure revenue impact is even higher.

What this means practically: the documentation burden on you as a departing California resident is higher than in any other state. You need to be prepared to defend your departure in detail, across multiple years, using contemporaneous records — not reconstructed ones.

The first 18 months after your claimed departure date are the highest-risk window. The FTB focuses on this period because it is when your California ties are expected to begin visibly dissolving. If your California activity in month 15 looks the same as it did before you claimed to move, you have a problem.

What Documentation You Need

You need a day-by-day record of where you actually were throughout the year — not a reconstructed estimate, but a contemporaneous GPS-verified log. California auditors know the difference. A day count you assembled from a paper calendar and credit card statements after receiving an audit notice is a weak defense. A continuous location record created passively before you had any reason to expect an audit is a completely different posture.

You need evidence that your Florida life is real. Medical providers. Community membership. Professional relationships. Estate documents governed by Florida law. Voter registration. Driver’s license. Vehicle registration. These are the table stakes.

You need to be prepared for the FTB to look at the California side just as hard: how often you visited, what you did there, what property you retained, what professional relationships you maintained.

None of this is impossible. People successfully establish Florida domicile from California every year. But people also fail, and the difference between success and failure is almost always documentation and the thoroughness of the life change — not the paperwork alone.

Who Should Move Now

Not every California high earner should move to Florida. The calculus depends on your specific income profile, your California ties, and your actual preferences about where to live.

The strongest cases for moving:

Your income is primarily investment-based — capital gains, dividends, partnership distributions. These are the dollars most completely protected from California tax by a genuine Florida domicile.
You have significant unrealized appreciated assets you plan to sell over the next five to ten years. The tax savings on those liquidations from Florida are enormous.
You are already spending significant time in Florida or have family or business interests there.
Your California ties are limited — no close family in the state, no California-domiciled business you actively manage.

The more complicated cases:

Your income is heavily tied to California business activity. California will still tax California-sourced income regardless of where you live. The savings are real but partial.
You have large unvested equity from California employment. California will assess its pro-rata share of those grants when they vest regardless of your residence at that time.
Your family is rooted in California. California auditors look at where your family lives as one of the strongest indicators of where you actually live.

The case for moving sooner rather than later: If an exit tax provision passes, leaving after that date transforms your departure itself into a taxable event. The value of leaving cleanly — before that law exists — is directly proportional to the unrealized gain embedded in your portfolio.

The Narrowing Window

California has been threatening wealth and exit taxes for years without enacting them. This history leads some people to conclude the threat is perpetual but never real.

That may be too comfortable a conclusion.

The fiscal pressure on California is real and growing. The political coalition favoring wealth taxes is larger and more organized than it was five years ago. Federal changes to the tax code — depending on the direction of federal policy — could either accelerate or diminish California’s motivation, but the state’s structural budget challenges are not going away. Each legislative session produces a new version of the proposal, refined based on previous failures, with new enforcement mechanisms to address the objections that killed the last version.

The people best positioned to leave cleanly are those who do it before the departure itself becomes expensive. Every year you wait is another year in which the legal landscape could shift.

More concretely: the FTB grows its residency audit capabilities over time. It builds data partnerships, refines its analytical tools, and accumulates institutional knowledge about what a fraudulent departure looks like. The more sophisticated the FTB’s audit program becomes, the higher the documentation standard you will need to meet. A move made in 2026 with contemporaneous records built from day one is easier to defend than a move made in 2029, scrutinized under a more capable audit program, with records built from 2029.

The window is open. It is not getting larger.

How Southbound Helps

The most common reason a California-to-Florida move fails under FTB scrutiny is not the paperwork. Most people handle the paperwork. The failure is an inability to produce, years later, a credible contemporaneous record of where they actually were, day by day, in the critical period following their departure.

California auditors know what a reconstructed record looks like. A day count assembled from old calendars, credit card statements, and remembered flights — compiled after an audit notice arrived — is a weak defense. An unbroken, GPS-verified record of your daily location, created passively and continuously before you had any reason to expect an audit, is an entirely different posture. It is the kind of record that reflects someone who understood what was at stake and took it seriously from day one.

Southbound builds that record automatically. The app runs in the background on your iPhone, logging whether each day is spent in Florida or outside it, using iOS’s significant-location-change technology — battery-efficient, passive, requiring no manual check-ins or diary entries. Every day is logged with GPS coordinates and accuracy metrics. Your location history is stored in your personal iCloud account and never on Southbound’s servers. We cannot see it. Your data is yours.

The Departure Budget — the central metric on the Southbound dashboard — tells you exactly how many days you can still spend outside Florida for the year and remain on track for your 183-day target. For someone managing time across California, Florida, and other states, and trying to keep California presence below the thresholds that trigger the most aggressive audit posture, that number is the thing you need to see clearly and automatically throughout the year. You will know before you book a trip whether it fits the plan.

When your FTB audit information document request arrives — potentially three or four years after your departure — you will have a clean, exportable log of every day, backed by GPS data, timestamped, and unimpeachable in a way that no reconstruction ever could be. That documentation is the difference between a defensible position and an expensive fight. Start building it on day one.

This post is for general informational purposes only and does not constitute tax or legal advice. California residency, domicile, and wealth tax matters are complex, rapidly changing, and highly fact-specific. The legislative proposals described here are subject to change and have not been enacted as of publication. Work with a qualified tax attorney and CPA who specialize in California FTB matters and interstate domicile planning before making any decisions based on anticipated tax treatment.