You have settled in France since Brexit, and now you are selling the house you kept in Manchester, Bristol or London. The sale completes, the money lands in your account, and then the worry starts: will the French tax office claim a share, will HM Revenue and Customs claim one too, and could you end up paying full capital gains tax twice on the same sale? The short answer is that both countries can indeed tax the gain, but the double tax treaty between France and the United Kingdom gives France the job of wiping out the double charge through a tax credit. The longer answer is that the relief only works if you file the right forms, in the right order, on both sides of the Channel, and inside deadlines that are brutally short. On the British side you must report the sale and pay any Capital Gains Tax within 60 days of completion. On the French side you must file a special return, form 2048-IMM, within the month following the disposal when the gain is not exempt in France. Miss either step and you face interest, penalties and a French assessment computed without the treaty credit. This guide explains where your UK house sale is taxed now that you are French resident, how the treaty credit works, how to declare the gain, and how to challenge a bill that ignores the treaty or gets the maths wrong.<\/p>\n
Once you are French tax resident, France taxes you on your worldwide income and gains, including a house sitting in England. French domestic law states the rule bluntly: \u201cLes personnes qui ont en France leur domicile fiscal sont passibles de l\u2019imp\u00f4t sur le revenu en raison de l\u2019ensemble de leurs revenus. Celles dont le domicile fiscal est situ\u00e9 hors de France sont passibles de cet imp\u00f4t en raison de leurs seuls revenus de source fran\u00e7aise.\u201d<\/a> In plain English, French residents pay income tax on everything they earn or gain anywhere in the world, while non-residents pay only on French-source income. Your UK house sale therefore falls inside the French net from the day your tax home, known in French as your domicile fiscal, moves to France.<\/p>\n Whether that day has actually arrived is often the first fight with the tax office. French law treats you as French tax resident if you meet any one of three tests: \u201c1. Sont consid\u00e9r\u00e9es comme ayant leur domicile fiscal en France au sens de l\u2019article 4 A : a. Les personnes qui ont en France leur foyer ou le lieu de leur s\u00e9jour principal ; b. Celles qui exercent en France une activit\u00e9 professionnelle, salari\u00e9e ou non, \u00e0 moins qu\u2019elles ne justifient que cette activit\u00e9 y est exerc\u00e9e \u00e0 titre accessoire\u201d<\/a>. Your foyer means your family home, the place where your spouse and children habitually live; your s\u00e9jour principal means the country where you spend most of the year. For a British family that has bought or rented its main home in France, enrolled the children in a French school and spends most nights there, the test is met even if one spouse still commutes to London. Keep boarding passes, utility bills, school certificates and your French residence permit together from the first year, because the date your tax residence switched determines which country had first claim on the gain and which forms you owed.<\/p>\n Inside France, the gain on a property sale is called a plus-value immobili\u00e8re, literally an increase in property value. The code draws the net very wide: \u201cI. \u2013 Sous r\u00e9serve des dispositions propres aux b\u00e9n\u00e9fices industriels et commerciaux, aux b\u00e9n\u00e9fices agricoles et aux b\u00e9n\u00e9fices non commerciaux, les plus-values r\u00e9alis\u00e9es par les personnes physiques ou les soci\u00e9t\u00e9s ou groupements qui rel\u00e8vent des articles 8 \u00e0 8 ter, lors de la cession \u00e0 titre on\u00e9reux de biens immobiliers b\u00e2tis ou non b\u00e2tis ou de droits relatifs \u00e0 ces biens, sont passibles de l\u2019imp\u00f4t sur le revenu dans les conditions pr\u00e9vues aux articles 150 V \u00e0 150 VH.\u201d<\/a> A cession \u00e0 titre on\u00e9reux is simply a disposal for money, as opposed to a gift or an inheritance, so an ordinary sale of your UK house, flat or plot is caught. The starting point of the calculation is equally simple: \u201cLa plus ou moins-value brute r\u00e9alis\u00e9e lors de la cession de biens ou droits mentionn\u00e9s aux articles 150 U \u00e0 150 UC est \u00e9gale \u00e0 la diff\u00e9rence entre le prix de cession et le prix d\u2019acquisition par le c\u00e9dant.\u201d<\/a> The gross gain is the sale price minus the purchase price paid by the seller, before the various reliefs and holding-period reductions are applied.<\/p>\n So France taxes the gain. But the United Kingdom taxes it as well, because the house stands on British soil. This is where the double tax treaty signed in London on 19 June 2008 between France and the United Kingdom steps in. For capital gains the treaty rule is article 14, and the French tax administration explains it in its official commentary: \u201cAux termes du paragraphe 1 de l\u2019article 14 de la convention, les plus-values que tire le r\u00e9sident d\u2019un \u00c9tat de l\u2019ali\u00e9nation de biens immobiliers vis\u00e9s \u00e0 l\u2019article 6 de la convention sont imposables dans l\u2019\u00c9tat de situation des biens.\u201d<\/a> An ali\u00e9nation is a disposal, and the \u00c9tat de situation is the country where the property sits. A house in Leeds sold by a French resident may therefore be taxed in the United Kingdom, the country of situation, even though the seller lives in France.<\/p>\n That sounds like double taxation, and without the second half of the treaty it would be. The treaty does not take away France\u2019s right to tax its own resident; it orders France to neutralise the British tax. The official commentary continues: \u201cl\u2019alin\u00e9a b) du paragraphe 4 de l\u2019article 24 pr\u00e9voit que lorsque des gains peuvent \u00eatre impos\u00e9s par un \u00c9tat contractant qui n\u2019est pas l\u2019\u00c9tat de r\u00e9sidence du c\u00e9dant en application des dispositions des paragraphes 1, 2 et 3 de l\u2019article 14, c\u2019est \u00e0 l\u2019autre \u00c9tat contractant, \u00c9tat de r\u00e9sidence du c\u00e9dant, et non au premier \u00c9tat contractant, qu\u2019il revient d\u2019\u00e9liminer la double imposition.\u201d<\/a> The c\u00e9dant is the seller. In your case the seller\u2019s residence state is France, so France must eliminate the double charge. For a house sale the credit equals the British tax: \u201cLe cr\u00e9dit d\u2019imp\u00f4t est \u00e9gal, pour les cessions portant sur des biens immobiliers ou des soci\u00e9t\u00e9s, partnerships ou trusts \u00e0 pr\u00e9pond\u00e9rance immobili\u00e8re, \u00e0 l\u2019imp\u00f4t britannique et, pour les autres cessions, \u00e0 l\u2019imp\u00f4t fran\u00e7ais, \u00e0 condition que le r\u00e9sident de France soit effectivement soumis \u00e0 l\u2019imp\u00f4t britannique \u00e0 raison de ces gains.\u201d<\/a> A cr\u00e9dit d\u2019imp\u00f4t is a tax credit subtracted from your French bill. The French tax office puts the same mechanism in everyday language: \u201cLorsqu\u2019une convention fiscale est sign\u00e9e, elle pr\u00e9voit en principe que les plus-values r\u00e9alis\u00e9es lors de la cession d\u2019immeubles sont imposables dans l\u2019\u00c9tat o\u00f9 les immeubles sont situ\u00e9s.\u201d<\/a> And on the amount of relief: \u201cIl est alors possible de d\u00e9duire un cr\u00e9dit d\u2019imp\u00f4t du montant de l\u2019imp\u00f4t fran\u00e7ais. Ce cr\u00e9dit d\u2019imp\u00f4t est d\u00e9termin\u00e9 selon les termes de la convention : il est \u00e9gal au montant de l\u2019imp\u00f4t fran\u00e7ais calcul\u00e9 sur cette plus-value ou \u00e0 l\u2019imp\u00f4t \u00e9tranger sans d\u00e9passer le montant de l\u2019imp\u00f4t fran\u00e7ais.\u201d<\/a> Take the logic in three steps. First, France computes its own tax on the gain under French rules. Second, you prove the British tax you actually paid on the same gain. Third, France subtracts a credit equal to the British tax, capped at the French tax, so you never pay more than the higher of the two bills on that gain. If the British bill is higher than the French computation, the surplus is not refunded; if the French computation is higher, you pay France the difference. Either way you do not pay twice.<\/p>\n Two practical consequences follow. First, always pay the British tax properly and keep the proof, because without British tax actually charged there is nothing to credit. Second, always declare the gain in France even when you expect the credit to wipe the French bill to zero, because the credit is granted through the French return, not automatically.<\/p>\n If you moved to France recently, a second treaty provision can extend the British claim well beyond the house itself. The official commentary warns: \u201cLe paragraphe 6 de l\u2019article 14 de la convention permet \u00e0 un \u00c9tat contractant d\u2019imposer, en vertu de son droit interne, les gains tir\u00e9s de l\u2019ali\u00e9nation de tout bien r\u00e9alis\u00e9e par une personne qui, \u00e0 un moment quelconque de l\u2019ann\u00e9e fiscale au cours de laquelle le bien est ali\u00e9n\u00e9, ou \u00e0 un moment quelconque pendant les six ann\u00e9es fiscales pr\u00e9c\u00e9dentes, est, ou a \u00e9t\u00e9, r\u00e9sident de cet \u00c9tat contractant.\u201d<\/a> In other words, the United Kingdom may tax gains on any asset, not only houses, realised by someone who was British resident at any point in the tax year of sale or the six previous tax years. This catches the classic post-Brexit pattern: you relocate to Lyon in 2024, keep a portfolio of shares or a second property, and sell in 2026. London can still raise a bill under its domestic rules for former residents.<\/p>\n For your UK house the analysis stays favourable, because the house is also covered by the situs rule in article 14, paragraph 1, and in that combined situation it is France that eliminates the double charge, as shown above. But the six-year rule matters for everything else you sell after the move, and it reverses the machinery: \u201cEn revanche, lorsque les gains r\u00e9alis\u00e9s par un r\u00e9sident de France sont susceptibles d\u2019\u00eatre impos\u00e9s par le Royaume-Uni sur le seul fondement du paragraphe 6 de l\u2019article 14 de la convention, il appartient au Royaume-Uni, et non \u00e0 la France, d\u2019\u00e9liminer la double imposition, selon les modalit\u00e9s pr\u00e9vues par les paragraphes 1 et 2 de l\u2019article 24 de la convention.\u201d<\/a> When London taxes only as the former residence state, London must give the relief. Map every disposal in the first six years after your move against both provisions before you file, and take coordinated advice in both countries rather than assuming the house logic covers shares, stock options or crypto-assets.<\/p>\n A related confusion must be cleared up, because it produces expensive mistakes. British owners often hear about the French levy on non-residents, the pr\u00e9l\u00e8vement, and assume it covers their UK sale. It does not. The levy is defined for people outside the French net selling French property: \u201cI. \u2013 1. Sous r\u00e9serve des conventions internationales, les plus-values, telles que d\u00e9finies aux e bis et e ter du I de l\u2019article 164 B, r\u00e9alis\u00e9es par les personnes et organismes mentionn\u00e9s au 2 du I lors de la cession des biens ou droits mentionn\u00e9s au 3 sont soumises \u00e0 un pr\u00e9l\u00e8vement selon les taux fix\u00e9s au III bis.\u201d<\/a> An un pr\u00e9l\u00e8vement here is a flat-rate withholding-style levy collected at the notaire\u2019s desk. Once you are French tax resident, you are no longer in that category for your UK house: you are taxed under the ordinary resident rules with a treaty credit, not under the non-resident levy. The same switch applies in reverse to a French house you kept: as a French resident you sell it under the standard plus-value immobili\u00e8re rules, not under the non-resident levy. Anyone who files a UK house sale on a non-resident form, or who lets a French notaire apply non-resident logic to a resident seller, is filing in the wrong lane, and the assessment that follows will be wrong from the first line.<\/p>\n Start with the British clock, because it runs fastest. The British government requires: \u201cYou must report and pay any Capital Gains Tax due on UK residential property within 60 days of completing the sale of the property.\u201d<\/a> Completion means the day legal ownership transfers, not the day you accept an offer or exchange contracts. The warning attached is explicit: \u201cYou may have to pay interest and a penalty if you do not report and pay on time.\u201d<\/a> File through the UK capital gains on property account, pay the estimated British tax, and keep the submission receipt and payment confirmation. Those two documents are the foundation of your French credit claim. Note that the 60-day return is separate from your ordinary UK Self Assessment return; one does not replace the other, and a sale with no British tax due can still carry a reporting obligation, so check the position for your exact facts rather than assuming silence is safe.<\/p>\n Turn next to the French filing. The French tax office instructs residents selling property abroad: \u201cSi vous avez r\u00e9alis\u00e9 une plus-value hors de France m\u00e9tropolitaine ou des d\u00e9partements d\u2019outre-mer et que ce revenu n\u2019est pas exon\u00e9r\u00e9 d\u2019imp\u00f4t en France en application d\u2019une convention fiscale internationale, il faut d\u00e9poser dans le mois qui suit la cession, aupr\u00e8s du service des imp\u00f4ts dont vous relevez\u201d<\/a> \u201cen cas de cession d\u2019un immeuble, une d\u00e9claration n\u00b0 2048-IMM.\u201d<\/a> A service des imp\u00f4ts is your local French tax office, and the 2048-IMM is the special capital gains return for property disposals. Because your UK house gain is taxable in France with a credit, not exempt, the 2048-IMM within the month after the sale is in principle due. The same official page gives the mirror case: \u201cSi la plus-value r\u00e9alis\u00e9e \u00e0 l\u2019\u00e9tranger est exon\u00e9r\u00e9e d\u2019imp\u00f4t en France, vous ne devez pas souscrire de d\u00e9claration n\u00b0 2048 en plus du formulaire n\u00b0 2047\u201d<\/a>, the 2047 being the return for income received abroad. Work out before completion which lane you are in, so the one-month clock does not catch you unprepared.<\/p>\n Behind those forms sits your ordinary annual obligation. French law requires every taxable person to file a detailed yearly return: \u201c1. En vue de l\u2019\u00e9tablissement de l\u2019imp\u00f4t sur le revenu, toute personne imposable audit imp\u00f4t est tenue de souscrire et de faire parvenir \u00e0 l\u2019administration une d\u00e9claration d\u00e9taill\u00e9e de ses revenus et b\u00e9n\u00e9fices, de ses charges de famille et des autres \u00e9l\u00e9ments n\u00e9cessaires au calcul de l\u2019imp\u00f4t sur le revenu\u201d<\/a>. Your UK gain therefore also appears on your yearly French income tax return, with the foreign tax credit claimed there. The practical order that keeps the credit intact is: complete the UK sale, file and pay the British 60-day return immediately, file the French 2048-IMM within the month, then report the gain and claim the credit on the annual return with the British payment proofs attached. Doing it backwards, declaring in France before the British tax is assessed and paid, invites the tax office to compute French tax with no credit and to chase you for the full amount.<\/p>\n The French computation itself can still shrink the bill before the credit. French domestic reliefs apply to the gain because France taxes it under its own rules first. The starting point remains the sale price minus the purchase price, and the major reliefs depend on how the property was used and how long it was held. If the UK house was genuinely your main home on the day of sale, French law exempts the gain: the code carves out \u201c1\u00b0 Qui constituent la r\u00e9sidence principale du c\u00e9dant au jour de la cession\u201d<\/a>, property that is the seller\u2019s main residence on the day of disposal. The official public-service site confirms in its English pages that the dwelling must be your main residence at the time of sale for full exemption. For a British family that moved to France and sells the old UK home months later, that condition will usually fail, which is precisely why the next reliefs matter. Property held for a long time earns taper relief: \u201cVous \u00eates exon\u00e9r\u00e9 d\u2019imp\u00f4t sur la plus-value immobili\u00e8re pour tout bien d\u00e9tenu depuis plus de 22 ans.\u201d<\/a> And the social levies, the pr\u00e9l\u00e8vements sociaux added to the income tax on the gain, fall away after an even longer hold: \u201cLa plus-value r\u00e9alis\u00e9e lors de la vente d\u2019un bien d\u00e9tenu depuis plus de 30 ans est aussi exon\u00e9r\u00e9e de pr\u00e9l\u00e8vements sociaux.\u201d<\/a> A house bought in 1998 and sold in 2026 therefore faces a very different French computation from a flat bought in 2021. Reconstruct the purchase price, the purchase deed, and the exact acquisition date before you file, because the tax office will not apply reliefs you cannot evidence.<\/p>\n One more trap deserves a sentence. Some sellers assume that letting the UK house for a year or two after the move changes nothing. It changes the exemption picture completely, as the next section shows through a 2026 court decision, and rental periods also complicate the British side. Keep the sale, the letting history and the residence timeline in one file, and make every adviser work from the same dates.<\/p>\n French assessments on foreign property sales go wrong in predictable ways: the tax office treats you as resident from the wrong date, ignores the treaty credit, caps the credit incorrectly, forgets holding-period relief, or taxes you under the non-resident levy by mistake. Each of these is challengeable, and the first illustration comes from a courtroom in Nice. On 2 July 2026 the third civil chamber of the Nice judicial court, case number 24\/01760, condemned a firm of notaires to compensate a seller who lost the main-residence exemption: \u201cl\u2019article 150 U, II, 1\u00b0 du code g\u00e9n\u00e9ral des imp\u00f4ts pr\u00e9voit une exon\u00e9ration d\u2019imp\u00f4t sur la plus-value immobili\u00e8re lorsque le bien c\u00e9d\u00e9 constituait la r\u00e9sidence principale, effective et habituelle du vendeur et \u00e9tait occup\u00e9 par lui au moment de la vente ; en revanche il n\u2019y a pas d\u2019exon\u00e9ration si le vendeur a quitt\u00e9 les biens immobiliers objet la cession avant celle-ci, et s\u2019ils \u00e9taient lou\u00e9s et occup\u00e9s par un tiers.\u201d<\/a> A r\u00e9sidence principale effective et habituelle is a real, everyday main home actually lived in, not a paper address. The seller had moved out and the property was let to someone else at the sale, so no exemption; the notaires, state-appointed conveyancing officers who owe clients a duty of advice and verification, had failed to secure the position and were ordered to pay 18,655 euros for the financial loss, 1,500 euros for moral harm and 2,500 euros under article 700 of the civil procedure code, the costs provision. For a British seller the moral is direct. If you moved to France, let the UK house, then sold it, neither France nor common sense treats it as your main home at sale. Structure the calendar deliberately: understand from day one whether you are selling a former main home with residual reliefs or a let investment with none, and put that analysis in writing with your notaire or conseil before the completion date, not after the assessment arrives.<\/p>\n When the assessment itself is wrong, French procedure gives you a two-stage remedy. First comes the formal complaint to the tax office, called a r\u00e9clamation contentieuse: \u201cLes r\u00e9clamations relatives aux imp\u00f4ts, contributions, droits, taxes, redevances, soultes et p\u00e9nalit\u00e9s de toute nature, \u00e9tablis ou recouvr\u00e9s par les agents de l\u2019administration, rel\u00e8vent de la juridiction contentieuse lorsqu\u2019elles tendent \u00e0 obtenir soit la r\u00e9paration d\u2019erreurs commises dans l\u2019assiette ou le calcul des impositions, soit le b\u00e9n\u00e9fice d\u2019un droit r\u00e9sultant d\u2019une disposition l\u00e9gislative ou r\u00e9glementaire.\u201d<\/a> L\u2019assiette is the taxable base and le calcul is the arithmetic, so a credit forgotten, a credit capped at the wrong figure, a residence date misread or a levy applied to a resident all fit squarely inside this complaint. File it in writing with the office that issued the assessment, attach the completion statement, the British 60-day filing receipt, the British payment proof, the French 2048-IMM and the annual return, and ask explicitly for the treaty credit under article 14 and article 24 of the France\u2013United Kingdom treaty with a recalculation. Second, if the administration rejects the complaint in whole or in part, you can go to court: \u201cEn mati\u00e8re d\u2019imp\u00f4ts directs et de taxes sur le chiffre d\u2019affaires ou de taxes assimil\u00e9es, les d\u00e9cisions rendues par l\u2019administration sur les r\u00e9clamations contentieuses et qui ne donnent pas enti\u00e8re satisfaction aux int\u00e9ress\u00e9s peuvent \u00eatre port\u00e9es devant le tribunal administratif.\u201d<\/a> The tribunal administratif is the first-instance administrative court for direct taxes. Both stages run under strict time limits that start from the assessment or the rejection letter, so diary them on receipt and do not wait for a reminder that will never come.<\/p>\n Frame the complaint around one of four arguments, in this order. First, residence timing: prove with the article 4 B evidence that you were French resident at the sale date, which switches the case from the non-resident levy to the resident-plus-credit regime. Second, treaty title: cite article 14, paragraph 1 for the shared taxing right and article 24, paragraph 4 for France\u2019s duty to eliminate the double charge. Third, credit maths: show the British tax actually paid, convert it at the correct rate, and demonstrate the cap computation line by line. Fourth, domestic computation: verify the gross gain under article 150 V, the acquisition date, and any holding relief before the credit is applied, because an inflated French base inflates even a correctly credited bill. Most files win or lose on documents rather than doctrine, so keep every deed, transfer confirmation, exchange-rate slip and filing receipt for the life of the challenge plus the years the administration can still audit.<\/p>\n Selling your UK house after settling in France does not mean paying full tax twice, but it does mean satisfying two tax systems that move at different speeds. France taxes the gain as part of your worldwide income, the United Kingdom taxes it because the bricks stand on its soil, and the treaty makes France erase the overlap with a credit equal to the British tax, capped at the French tax on the same gain. Recent movers should also watch the six-year British shadow over their other assets. File the British 60-day return and pay first, file the French 2048-IMM within the month, declare everything on the annual return with the British proofs, and check the French computation for residence dates, holding relief and credit maths before you accept it. If the assessment ignores the treaty or miscalculates the credit, complain in writing and, if needed, take the case to the administrative court. Handled in that order, a UK sale funds your French life instead of funding two treasuries.<\/p>\n Telephone consultation within 48 hours with a lawyer of the firm. Call +33 6 46 60 58 22<\/a> or write via our contact page<\/a> with your sale date, completion statement and tax residence timeline.<\/p>\n","protected":false},"excerpt":{"rendered":" French resident selling your UK house? Both France and the UK can tax the gain, but the treaty gives France a credit equal to the British tax. Deadlines, 2048-IMM and 60-day UK return, and how to challenge a wrong bill.<\/p>\n","protected":false},"author":251031309,"featured_media":16512,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kj_source_type":"","_kj_official_id":"","_kj_official_url":"","_kj_judilibre_id":"","_kj_jur":"","_kj_lieu":"","_kj_chambre":"","_kj_rg":"","_kj_date":"","activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"federated","footnotes":""},"categories":[80312,80314],"tags":[],"class_list":["post-2121243","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-british-desk","category-decryptage"],"yoast_head":"\nB. Recent movers face a six-year British shadow, and non-resident rules do not protect you<\/h3>\n
II. How to declare the sale and how to challenge an unfair bill<\/h2>\n
A. File on both sides of the Channel in the right order and inside the deadlines<\/h3>\n
B. Challenge the assessment when the treaty or the maths is wrong<\/h3>\n
Conclusion<\/h2>\n
Need a quick opinion on your case?<\/h2>\n