No tax treaty between France and the Isle of Man: what this changes

France's administrative list of tax treaties does not include any entry for the Isle of Man. However, an annex to the 2027 draft budget law mentions an information exchange agreement. Therefore, no treaty article distinguishes between two residences, and no withholding tax is capped by a treaty: domestic law applies. Income from Manx-sourced securities received by a person domiciled in France does not entitle them to a treaty tax credit. This page indicates what we have confirmed and what it does not address.

An information exchange line, no agreement line

The BOI-ANNX-000306 doctrine, version of April 29, 2026, contains no information for the Isle of Man. It only lists agreements in force on January 1, 2026. This omission should be verified before any decision is made.

The annex to the 2027 Finance Bill concerning the information exchange network contains the line "Isle of Man: Information exchange agreement entered into force on 04/10/2010." Such an agreement organizes the exchange of information. We have not read the text and we do not attribute any effect to it on the allocation of tax revenue.

The same annex lists 11 states on the French list of non-cooperative states and territories, as of the decree of April 15, 2026. The Isle of Man is not included. The list is verified on the date of departure.

The Franco-British convention remains. The BOFiP (French Official Tax Bulletin) notes that France and the United Kingdom have signed two conventions. Its page does not mention the Isle of Man and does not specify the geographical scope of the term "United Kingdom." We will not address this point.

Without an agreement, there is no tax credit for taxes paid on the island.

The practical guide to income tax for 2026 states it succinctly: in the absence of a tax treaty, income is taxable in France, without any elimination of potential double taxation. The instructions for form 2047 (income for 2025), in its section on securities and movable capital, add two rules for a country without a treaty:

• no tax credit; ;
• declaration for the net amount of tax withheld abroad, or for the gross amount if no tax has been paid at source.

For other income categories, such as rent from a property located on the island, we have not confirmed the treatment. It is verified on a case-by-case basis.

Your tax residence is determined without a tie-breaking clause.

Article 4 B of the French General Tax Code (CGI) identifies three categories of criteria: personal, professional, and economic. Only one is required (BOI-IR-CHAMP-10, § 70 and § 310). A stay of more than six months in the year "does not constitute an absolute criterion" (§ 150). The principal activity is the one that occupies the most actual time (§ 220). The center of economic interests is a separate criterion (§ 230).

The BOFiP (Official Bulletin of Public Finances) specifies that these internal rules apply subject to tax treaties (BOI-INT-DG-20-10-10, § 20). In the absence of a listed treaty, there is no article to differentiate between a French domicile and a Manned residence. Income earned abroad by a person domiciled in France is taxable "even if it has not been transferred to France" (BOI-INT-DG-20-10-10, § 70). Persons domiciled outside France are taxable only on their French-source income (BOI-INT-DG-20-10-10, § 90).

What the island plans to do regarding foreign taxes

On the Manx side, the tax authorities state that residents are taxed on their worldwide income. Without an agreement with the country of origin, they provide for unilateral relief. This relief assumes that all reasonable steps have been taken to reduce foreign tax and that proof of this tax is provided. It is limited to the lesser of the foreign tax paid and the Manx tax due (section 57 of the Income Tax Act 1970).

This relief protects a resident of the island. It does not replace a French tax credit. The Manx websites consulted do not mention France among the agreements: they only state that the island has agreements with various countries, and cite the agreement with the United Kingdom, in effect for income tax since April 6, 2019.

Non-resident rate of 21 %: what the island retains from its own revenue

A person leaving the island remains liable for tax on their Manx-sourced income, such as rental income or occupational pensions. For the 2026/27 tax year, the non-resident rate is 21 % and the non-resident allowance is £0. Bank interest, dividends, and the Manx state pension are not taxable for non-residents, according to the "Leaving the Island" page. The island states that it has neither capital gains tax nor inheritance tax.

Exit tax for a manager who owns 60 % shares in their company: numerical example (fictitious profile)

Situation. A fictitious executive has been domiciled in France for over six years. He holds 60% of his company's profits. His shares are worth €650,000, and the unrealized capital gain is €400,000. He is planning to move to the Isle of Man in 2026.

Issue. The value of the securities is less than €800,000. The administration's information sheet mentions a second situation: securities representing at least 50% of a company's profits. He wants to know if this applies to him and what difference the absence of an agreement makes.

Strategy. Before leaving, he has three points checked: the condition of the 50 % of social benefits, the eligibility of the island for automatic deferment (the list of States in case no. 1 of notice 2074-ETD does not mention the Isle of Man, according to our reading; it mentions the United Kingdom) and, if deferment is requested, the 90-day period before the transfer, formulated differently in the notice and in the fact sheet.

Result. Calculation assumptions: unrealized capital gain of €400,000; income tax at 12.8% (%), a rate specified in the 2074-ETD notice for transfers in 2025 but not for a departure in 2026 (we use this rate here without explicitly stating it for 2026); social security contributions at 18.6% (%), the rate given in the notice for departures in 2026. Based on these figures, income tax is €51,200 and social security contributions are €74,400. The total is €125,600, representing 31.4% of the capital gain, before deferral and before tax relief. Since the securities are worth less than €2.57 million, the tax relief requires a holding period of two years. For a departure in 2027, the social security contribution rate is not shown here.

Departure procedures and accounts opened on the island

Initially, the tax authorities require you to report your new address, declare your income from January 1st to your departure date on form 2042, and report your foreign-source income on form 2047. Form 2042-NR only includes French-source income taxable in France, from your departure date to December 31st. The French Wealth Tax (IFI) is managed by the SIP-NR (French Tax Administration). The official website recommends contacting your local tax office.

Bank accounts, life insurance or capitalization contracts, and digital asset accounts opened, held, used, or closed abroad must be declared annually. The fine is €1,500 per undeclared account. The French tax authority (Service-public.fr) stipulates a fine of €10,000 for an account located in a country that has not signed a tax treaty with France to combat tax fraud and evasion. We do not classify the Isle of Man under this criterion.

What this page does not cover

It does not address the Manx tax residency requirement (the official documents defining it could not be reviewed), nor the conditions for the tax capping option, nor social security contributions, nor residence permits, nor local savings. These points should be verified with a professional based on the island. It also does not address the scope of the Franco-British tax treaty.

What changes depending on your situation

• Your tax residence on the date of departure and its duration in France.
• The nature and value of your securities, and your share of the profits of your companies.
• The applicable stay of execution at your destination and the time you request it.
• The nature of the income you keep on the island or in France.

A departure is prepared based on the facts of your case. No outcome is guaranteed in advance.