{"id":2115334,"date":"2026-09-02T10:14:30","date_gmt":"2026-09-02T08:14:30","guid":{"rendered":"https:\/\/kohenavocats.fr\/2026\/09\/02\/leaving-france-uk-after-brexit-final-french-tax-return-2042-nr\/"},"modified":"2026-09-02T10:14:30","modified_gmt":"2026-09-02T08:14:30","slug":"leaving-france-uk-after-brexit-final-french-tax-return-2042-nr","status":"publish","type":"post","link":"https:\/\/kohenavocats.fr\/en\/2026\/09\/02\/leaving-france-uk-after-brexit-final-french-tax-return-2042-nr\/","title":{"rendered":"Leaving France for the UK After Brexit: Final French Tax Return, Form 2042-NR and Proof of Departure"},"content":{"rendered":"

A British citizen who leaves France for the United Kingdom does not simply close a French tax account on the day the removal van crosses the Channel. The decisive questions are when the French domicile fiscal<\/em> (tax residence) actually ended, which income was received before that date, which French-source income continued afterwards, and what evidence proves the sequence. Brexit does not remove the France\u2013UK tax treaty, but it does make the border, the forms and the supporting documents more important. The French administration and HM Revenue & Customs (HMRC) also use different tax years and different concepts of residence.<\/p>\n

This article addresses the personal legal and tax consequences of returning from France to the UK: the residence analysis, the final French income-tax return, Form 2042-NR, foreign accounts, French property income, the limited possibility of an exit tax, and the remedies available if France continues to treat you as resident. It does not explain how to purchase French property or create a company. The objective is practical: establish a defensible departure date, file the right returns, preserve treaty relief and challenge an incorrect assessment without allowing a filing deadline to expire.<\/p>\n

I. How do I establish the date of my French tax departure after Brexit?<\/h2>\n

A. Am I still French tax resident in the year I leave for the UK?<\/h3>\n

The first mistake is to treat the number of days spent in France as the whole test. Days matter, but French tax residence is built from a wider factual assessment. The French expression domicile fiscal<\/em> means tax residence for the application of the French tax code. It is not decided by nationality, the address printed on a bank statement or the date at which a British council-tax account was opened. The administration examines the French home or family centre, the principal place of stay, professional activity and economic interests. A person may have a new UK address and still need to prove why the French residence ended on a particular date.<\/p>\n

The starting rule is Article 4 A of the French General Tax Code (CGI)<\/a>. The official text states: \u00ab Les personnes qui ont en France leur domicile fiscal sont passibles de l’imp\u00f4t sur le revenu en raison de l’ensemble de leurs revenus. \u00bb In practical terms, a French tax resident is normally assessed on worldwide income, while a person whose tax residence is outside France is assessed in France on French-source income under the second sentence of the same article. The effect is substantial, so the date of the change must be supported rather than assumed.<\/p>\n

Article 4 B of the CGI<\/a> supplies the domestic criteria. Its opening identifies \u00ab Les personnes qui ont en France leur foyer ou le lieu de leur s\u00e9jour principal \u00bb. The provision also refers to a professional activity in France and the centre of economic interests in France. The French term foyer<\/em> means the place where a person normally lives and where family life is centred; s\u00e9jour principal<\/em> means the principal place of stay; and the centre of economic interests concerns the main financial and business connections. These are separate routes to a residence finding. Moving personal belongings to the UK is relevant, but it does not automatically override a spouse remaining in France, a French home kept available for ordinary living, or a business managed from France.<\/p>\n

The domestic test should be reconstructed on a timeline. Identify the last day on which the French home was genuinely your normal home, the day the UK home became available, the dates of travel, the location of your work, the place where your spouse and dependent children lived, and the date on which French services, insurance and utilities changed. A short return to France to clear a property, attend a completion appointment or collect records is not necessarily a return of tax residence. Conversely, repeated long stays, a family home and continuing professional activity can undermine a claimed departure even when the taxpayer spends more nights in the UK.<\/p>\n

Family members should not be treated as one undifferentiated fact. The French tax administration\u2019s guidance on departure abroad explains that the tax residence of each member of the household can require its own assessment. If one spouse leaves on 15 September and the other remains in France until December, the declaration and treaty analysis should state that difference. A child\u2019s school year, a dependent relative\u2019s care, or a spouse\u2019s continuing employment can explain why documents point in different directions. The difference should be explained in the covering message instead of allowing the administration to infer that the whole household stayed or left on the same date.<\/p>\n

The France\u2013UK treaty is relevant when both countries claim residence under their internal rules. The treaty was published in France by Decree no. 2010-20 of 7 January 2010<\/a>; the convention\u2019s official text is contained in the linked annex, including Article 4 on residence. Article 4 uses a sequence rather than a free choice. It refers first to a permanent home, then to closer personal and economic relations, the centre of vital interests, habitual abode and nationality, with competent-authority agreement as the final route where necessary. The original French text says: \u00ab cette personne est consid\u00e9r\u00e9e comme un r\u00e9sident seulement de l’Etat contractant o\u00f9 elle dispose d’un foyer d’habitation permanent \u00bb.<\/p>\n

That treaty language does not mean that a British passport settles the issue. A permanent home in both countries requires the next tie-breaker; an address alone cannot answer where personal and economic relations are closer. The UK\u2019s official version of the 2008 UK\u2013France Double Taxation Convention<\/a> gives the English wording and should be read with the French publication, especially where HMRC requests treaty evidence.<\/p>\n

French administrative courts repeatedly insist on the order of analysis. In CAA Bordeaux, 5 March 2024, no. 22BX00848<\/a>, the court stated: \u00ab Une convention bilat\u00e9rale conclue en vue d’\u00e9viter les doubles impositions ne peut pas, par elle-m\u00eame, directement servir de base l\u00e9gale \u00bb. The decision then explains that the judge first examines the domestic French tax law before deciding whether the treaty prevents the domestic assessment. For a British resident, the operational consequence is clear: prepare both files. One file should show why the French domestic criteria no longer applied; the other should show why the treaty assigns residence to the UK if France and the UK both regarded you as resident.<\/p>\n

The family-home criterion is not theoretical. In CAA Nancy, 18 March 2021, no. 19NC01441<\/a>, the court described the household as \u00ab le lieu o\u00f9 le contribuable habite normalement et a le centre de ses int\u00e9r\u00eats familiaux \u00bb. It added that the principal-stay test matters where there is no home. That decision does not decide every British departure, but it demonstrates why a UK tenancy agreement alone may be insufficient when a spouse and children continue to occupy the French family home. The date on which the last relevant French residence criterion ended should be identified separately from the date on which a notice was sent to the tax office.<\/p>\n

Do not import the UK\u2019s statutory residence concepts into the French return without translation. HMRC applies its own statutory-residence and, where available, split-year rules. Its guidance for people coming to or leaving the UK<\/a> and its foreign-income guidance<\/a> should be checked for the UK tax year, which generally runs from 6 April to 5 April. France\u2019s individual income tax return works by calendar year. A person leaving France in October can therefore have a French part-year event in calendar year N while entering a different UK reporting period. The two returns must be reconciled by dates, not by copying one country\u2019s tax-year label into the other country\u2019s form.<\/p>\n

A reliable departure file contains the following evidence, dated as close as possible to the move:<\/p>\n