The five-year rule: when do you become a tax resident of St. Barths?

You become a tax resident of St. Barths after five years with your tax home on the island. That condition, simple and strict, is set by French constitutional law. The island has no personal income tax and no corporate income tax, but that system does not apply from the day you move: before five years, France does the taxing.

What does the five-year rule say?

Since 2007, St. Barths has been a French overseas collectivity that sets its own taxes (see taxes in St. Barths). The law that granted this power also limited it: the island’s tax jurisdiction only covers people who have been attached to it for at least five years. The local tax code restates the rule in articles 2 to 5.

Until the five years are up, a person is treated as having their tax home in mainland France or in a French overseas department. French tax law then applies in full, whatever the address on the mailbox.

When does an individual become a St. Barths tax resident?

You become a tax resident of St. Barths once you have had your tax home there for at least five years. Tax home is assessed using the usual French criteria: where your household lives, where you mainly stay, where you mainly work, and where your economic interests are centered.

Two counts run side by side. Under the constitutional law, the five years run from the actual transfer of your tax home. Under local law, the tax code requires at least five years as of January 1 of the tax year.

Topic	Before five years	After five years
Income	French tax, on worldwide income	No local tax; France taxes French-source income
Social levies	Owed in France	To be checked case by case
Real estate wealth tax (IFI)	Worldwide real estate	Real estate located in France, above €1.3 million
Gifts and inheritances	French taxes	Local rules, unless there is a link to France

When does a company fall under the St. Barths tax system?

A company can fall under the island’s tax system in one of two ways.

Route	Condition
Seniority	Place of effective management on the island for at least five years
Control	Place of effective management on the island, and direct or indirect control by individuals who have been residents for at least five years

If neither condition is met, the company is tax-resident in France and pays French corporate tax.

The place of effective management is where decisions are actually made: where the manager lives, where shareholder meetings are held, where the bank account is, where contracts are signed. A registered address alone is not enough. The clock starts when management is actually established on the island, not at registration if the company is run from elsewhere.

Control is not defined in any of the texts. In practice, the reference is a majority of the voting rights and the power to appoint the managers. It has to be real and capable of proof, for example through meeting minutes.

The authorities apply the rule strictly. In guidance published on October 23, 2024, they confirmed that a company managed from the island for less than five years, and not controlled by five-year residents, remains subject to French corporate tax. See also how the rule applies to companies.

Example: a consultant who moved in 2025, and his company

Take Julien, a consultant who moves to St. Barths in March 2025. In 2026, he sets up a consulting company there, which he owns alone and manages from the island. The amounts are assumptions, for illustration only.

His personal timeline

When	What happens
March 2025	He moves: the clock starts
Until March 2030	French taxpayer, on his worldwide income
March 2030	Fifth anniversary: resident under the constitutional law
Year 2030	Transition year: income split between the two periods
2031	First year in which the five years are met on January 1, under the local tax code

His company in 2027

Assume a profit of €100,000, fully distributed after tax. The place of effective management has been on the island for less than five years, and Julien is not yet a five-year resident: neither route is open. The company is subject to French corporate tax, here at the small-business rate (15% up to €42,500 of profit, 25% above).

1. Corporate tax: €42,500 × 15% = €6,375, then €57,500 × 25% = €14,375, for a total of €20,750.
2. Profit left to distribute: €100,000 - €20,750 = €79,250.
3. Dividend, taxed in France at 30%: €79,250 × 30% = €23,775.
4. Total French tax: €20,750 + €23,775 = €44,525. Julien keeps €55,475.

Yet both the company and its owner are based on the island. The picture only changes once Julien has completed his own five years: the company can then fall under local tax rules through the control route, provided the management on the island and the control are real.

The five-year rule: common mistakes

• Assuming that moving is enough. A newcomer remains a French taxpayer for five years.
• Setting up an island company and running it from elsewhere. Without real management on site, it falls under French tax.
• Thinking the clock can be shared. The five years are personal. They do not benefit a spouse who arrives later, or a newly formed company.
• Neglecting the paper trail. You must be able to prove your arrival date with documents.
• Overlooking the departure from France. Moving your tax home out of France can trigger the French exit tax for holders of shareholdings above €800,000 or representing 50% of a company. For a move to St. Barths, the transfer only takes effect at the end of the five years.

What happens after five years of residency?

Once you are a resident, local tax rules apply to your income and assets connected to the island. France still keeps the right to tax your French-source income, your real estate located in France and, in some cases, what your heirs receive if they live in France. Likewise, an island-resident company that does business in France through an establishment there remains taxable in France on that establishment. See what France still taxes and inheritance and gift tax.

The five-year rule: the bottom line

The five-year rule decides tax residency in St. Barths: a person only falls under the island’s tax system after having had their tax home there for at least five years. Before that, they remain taxed in France on all of their income, including income earned on the island. A company needs its place of effective management on the island for five years, or a place of effective management on the island plus control by five-year residents. The clock is personal: it does not pass to a spouse who arrives later, or to a company you set up. Becoming a resident is therefore a multi-year project: date your arrival, keep your records, check where your companies stand, and plan the transition year with an advisor.

A note for U.S. readers: this article covers French and St. Barths rules only. U.S. citizens and green card holders remain subject to U.S. tax on their worldwide income wherever they live.