You own a house in France, you hold a British passport, and every spring your French tax return asks questions about property wealth. Since Brexit changed nothing about this tax itself, many British owners discover it late: France charges an annual tax on real-estate wealth, the IFI (imp\u00f4t sur la fortune immobili\u00e8re, the French tax on real-estate wealth), and it applies to British owners on exactly the same terms as to French nationals. There is no British exemption, no Brexit opt-out and no minimum stay that switches it off. What matters is where you live for tax purposes (your domicile fiscal, the country where you are tax-resident) and what your property is worth on 1 January each year.<\/p>\n
This article explains who pays, how the bill is worked out, and how to challenge it. It covers residents and non-residents, the five-year relief for newcomers, valuation and deductible loans, the 30 per cent reduction for your main home (r\u00e9sidence principale, the dwelling where you actually live), the rate scale, gifts that reduce the bill, and the full challenge route from correcting your return to going before the tribunal judiciaire (the French first-instance civil court that hears tax disputes). Every key rule below is tied to the exact article of the Code g\u00e9n\u00e9ral des imp\u00f4ts (the French general tax code) and to court decisions quoted word for word.<\/p>\n
Yes, wherever you live. The tax is charged when qualifying property passes a threshold, and Brexit did not create any British exclusion. The only questions are which of your assets count and where they sit. French tax residents are taxed on worldwide qualifying property; people living outside France are taxed only on French property. That split runs through everything that follows, so identify your side of the line first.<\/p>\n
If France is your domicile fiscal, you fall within the first paragraph of the charging provision: “Sont soumises \u00e0 cet imp\u00f4t, lorsque la valeur de leurs actifs mentionn\u00e9s \u00e0 l’article 965 est sup\u00e9rieure \u00e0 1 300 000 \u20ac : 1\u00b0 Les personnes physiques ayant leur domicile fiscal en France, \u00e0 raison de leurs actifs mentionn\u00e9s au m\u00eame article 965 situ\u00e9s en France ou hors de France.” (Article 964 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). In plain terms, once the net value of your qualifying assets passes 1,300,000 euros, French residents pay IFI on all of them, including property outside France, such as a house you kept in Kent or a flat in Edinburgh. The threshold is assessed on the household, not per property, and the position is reviewed every 1 January.<\/p>\n That worldwide scope alarms many new arrivals, so the same article builds in a soft landing. Newcomers who were not tax-resident in France during the five calendar years before settling here are taxed, for five years, as if they were non-residents: “les personnes physiques mentionn\u00e9es au premier alin\u00e9a du pr\u00e9sent 1\u00b0 qui n’ont pas \u00e9t\u00e9 fiscalement domicili\u00e9es en France au cours des cinq ann\u00e9es civiles pr\u00e9c\u00e9dant celle au cours de laquelle elles ont leur domicile fiscal en France ne sont imposables qu’\u00e0 raison des actifs mentionn\u00e9s au 2\u00b0.” (Article 964 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). During that window only your French property counts; your British home and any other non-French property stay outside IFI until 31 December of the fifth year after you arrived. After that date the full worldwide basis applies, so diary the expiry and revalue the whole portfolio in time.<\/p>\n Three household points follow from the same article. First, married couples are taxed jointly, and so are partners in a PACS (pacte civil de solidarit\u00e9, the French registered civil partnership) and couples in a stable unmarried relationship (concubinage notoire): the law states that “les couples mari\u00e9s font l’objet d’une imposition commune” and extends joint taxation to PACS partners and recognised cohabitants (Article 964 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). You cannot halve the threshold by splitting ownership on paper between spouses. Second, the base expressly includes property belonging to your minor children where you hold legal administration of their assets: “L’assiette de l’imp\u00f4t sur la fortune immobili\u00e8re est constitu\u00e9e par la valeur nette au 1er janvier de l’ann\u00e9e : 1\u00b0 De l’ensemble des biens et droits immobiliers appartenant aux personnes mentionn\u00e9es \u00e0 l’article 964 ainsi qu’\u00e0 leurs enfants mineurs, lorsqu’elles ont l’administration l\u00e9gale des biens de ceux-ci” (Article 965 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). A house put in a child’s name does not leave the household base while you administer it. Third, the same base catches indirect holdings: shares in companies or bodies, French or foreign, count “\u00e0 hauteur de la fraction de leur valeur repr\u00e9sentative de biens ou droits immobiliers d\u00e9tenus directement ou indirectement par la soci\u00e9t\u00e9 ou l’organisme” (Article 965 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). If you hold your Dordogne house through an SCI (soci\u00e9t\u00e9 civile immobili\u00e8re, the French non-trading property company many British families use), the shares enter the base for the fraction that represents the underlying property. Readers who hold French property inside a British family trust face a separate declaration regime, described in this firm’s analysis of British family trusts, IFI and succession in France<\/a>, and should read the two together.<\/p>\n Practical consequence for residents: list every property worldwide, deduct only qualifying debts (see II.A below), and check the 1.3 million euro line on net value. If you moved recently, confirm in writing that the five-year relief covers you and when it ends, because the tax office will not apply it on a mere assumption.<\/p>\n If your domicile fiscal is in the United Kingdom, France still taxes you, but only on French assets. The charging article taxes non-residents “\u00e0 raison des biens et droits immobiliers mentionn\u00e9s au 1\u00b0 de l’article 965 situ\u00e9s en France” (Article 964 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>), with shares in companies or bodies caught for the fraction of their value that represents the same French property. Your British home never enters the French base; your Proven\u00e7al farmhouse, your Paris studio and the shares of the SCI that holds them always do, for the fraction that represents French bricks and mortar.<\/p>\n Two traps catch British second-home owners here. The first is the main-home reduction. French law grants a 30 per cent reduction on the market value of the owner’s main home, but a holiday home you visit for six weeks a year is not a r\u00e9sidence principale, so no reduction applies to it. If you later retire to France and make the house your real home, the reduction switches on from the 1 January when occupation as a main home is genuine; before that date, value it in full. The second trap is assuming that non-residence means light paperwork. It does not: the declaration duty, the valuation rules and the penalties for omission apply to non-residents in full, and the tax office routinely cross-checks published sale prices in popular British-buyer areas against declared values.<\/p>\n A related question is whether anything paid in Britain reduces the French bill. IFI is computed under French domestic rules first, and any question of relief on the UK side belongs to your British return and to the wording of the applicable treaty, which is outside the calculation described here. The British government’s own living-in-France guidance points readers to the United Kingdom’s double-taxation agreement with France, noting that it exists so the same income is not taxed in both countries (Living in France, GOV.UK<\/a>), which is an income-tax statement, not an IFI credit. Work out the French bill on French rules, keep the UK question separate, and take advice on each side from the right professional. If you are weighing a sale to fall below the threshold, read first how a disposal is taxed and challenged in this firm’s guide to selling a former French home after leaving France<\/a>, because exit timing changes both taxes at once.<\/p>\n The calculation has four steps: value each asset, subtract qualifying debts, apply reliefs, then run the rate scale. Each step has its own case law, and errors at any step can be challenged. Keep purchase deeds, loan statements, letting records and any professional valuation together; in every reported dispute below, the paperwork decided the outcome.<\/p>\n Start with market value, the valeur v\u00e9nale (the price the property would fetch on the open market), on 1 January. The code sends you to the inheritance-valuation rules and then grants the main-home reduction: “un abattement de 30 % est effectu\u00e9 sur la valeur v\u00e9nale r\u00e9elle de l’immeuble lorsque celui-ci est occup\u00e9 \u00e0 titre de r\u00e9sidence principale par son propri\u00e9taire.” (Article 973 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). One property only per jointly taxed household can take it. For a British family that moved into its Lyon house full-time, that single reduction often decides whether the household crosses the 1.3 million line at all.<\/p>\n Valuation method matters as much as the figure. The Paris tax court rejected a taxpayer who tried to revalue two Paris flats downwards years later using sale comparisons that did not match the property or that post-dated the taxing date, and it threw out his fallback capitalisation method, holding that capitalisation cannot value a building that is not let from an assumed rental value, as the expert had tried to do. The court added that the administration had correctly recalled the comparative method for assessing market value, and it closed by dismissing the taxpayer’s refund claim in full (Tribunal judiciaire de Paris, 9th chamber, 3rd section, 19 January 2024, RG 22\/08190). The lesson is direct: comparable sales must resemble your property and sit at the right date, and an unlet home cannot be valued by capitalising an imaginary rent. Commission a proper valuation at or near 1 January, keep the comparables, and never file a figure you cannot evidence twice.<\/p>\n Owners who hold through an SCI face a second valuation fight: discounts on the shares. The Cour de cassation has now fixed the principle that “Il r\u00e9sulte de la combinaison des articles L. 17 du livre des proc\u00e9dures fiscales, 885 S et 761 du code g\u00e9n\u00e9ral des imp\u00f4ts que la valeur v\u00e9nale des parts des soci\u00e9t\u00e9s civiles immobili\u00e8res doit \u00eatre appr\u00e9ci\u00e9e en tenant compte de tous les \u00e9l\u00e9ments permettant d’obtenir un chiffre aussi proche que possible de celui qu’aurait entra\u00een\u00e9 le jeu normal de l’offre et de la demande.” (Cour de cassation, commercial chamber, 9 July 2025, appeal no. 24-13.540<\/a>). In that case the taxpayer already enjoyed two 10 per cent discounts, one for illiquidity of the buildings and one for illiquidity of the shares, and wanted a third 10 per cent for deemed joint ownership. The Court approved the appeal judges who had held that “la situation de l’associ\u00e9 d’une soci\u00e9t\u00e9 civile immobili\u00e8re n’est pas celle d’un indivisaire” (an SCI shareholder is not in the same position as a joint owner in indivision, the form of co-ownership where each owner holds an undivided share), refused the extra discount, and ended with “REJETTE le pourvoi” (Cour de cassation, commercial chamber, 9 July 2025, appeal no. 24-13.540<\/a>). Claim only discounts your valuer can justify term by term; stacking a third discount on top of two illiquidity discounts will now fail.<\/p>\n Next subtract qualifying debts. The code allows deduction of “les dettes, existantes au 1er janvier de l’ann\u00e9e d’imposition, contract\u00e9es par l’une des personnes mentionn\u00e9es au 1\u00b0 de l’article 965 et effectivement support\u00e9es par celle-ci, aff\u00e9rentes \u00e0 des actifs imposables” (Article 974 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>), which in practice means the outstanding capital of the acquisition mortgage, loans for repairs the owner genuinely bore, improvement and building works, and property taxes that are not normally the occupier’s. Only debts existing on 1 January and actually borne by you count, and only in proportion to the taxable fraction of the asset. Keep the 1 January loan statement every year; a debt repaid in February still counts for that year’s IFI, while a loan taken out in March does not.<\/p>\n Two reliefs then reduce many bills. Property used for your main professional activity is exempt: “Sont exon\u00e9r\u00e9s les biens ou droits immobiliers mentionn\u00e9s au 1\u00b0 de l’article 965 et les parts ou actions mentionn\u00e9es au 2\u00b0 du m\u00eame article 965 repr\u00e9sentatives de ces m\u00eames biens ou droits” where “ces biens ou droits immobiliers sont affect\u00e9s \u00e0 l’activit\u00e9 principale industrielle, commerciale, artisanale, agricole ou lib\u00e9rale des personnes mentionn\u00e9es au 1\u00b0 dudit article 965.” (Article 975 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). A British artisan whose workshop is also the taxable building should test this exemption before paying. And certain gifts cut the bill directly: “Le redevable peut imputer sur l’imp\u00f4t sur la fortune immobili\u00e8re, dans la limite de 50 000 \u20ac, 75 % du montant des dons en num\u00e9raire et dons en pleine propri\u00e9t\u00e9 de titres de soci\u00e9t\u00e9s admis aux n\u00e9gociations sur un march\u00e9 r\u00e9glement\u00e9 fran\u00e7ais ou \u00e9tranger effectu\u00e9s au profit” of listed research, higher-education, public-interest and similar bodies (Article 978 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). A 10,000 euro cash gift to a qualifying foundation therefore wipes 7,500 euros off the IFI, within the 50,000 euro cap.<\/p>\n Split ownership (d\u00e9membrement, dividing ownership between a life interest and the underlying capital) follows its own rule: assets burdened with a usufruct (usufruit, the lifetime right to use the property and take its income), a right of habitation or a personal right of use are counted “dans le patrimoine de l’usufruitier ou du titulaire du droit pour leur valeur en pleine propri\u00e9t\u00e9” (Article 968 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>), meaning the life tenant, not the bare owner (nu-propri\u00e9taire, the owner of the capital without the use), bears the full value, except for legal family usufructs which are split on the statutory age scale. British parents who gave the bare ownership to their children while keeping the use should therefore expect the whole house to remain in the parent’s base.<\/p>\n Finally run the scale. The code provides that “Le tarif de l’imp\u00f4t est fix\u00e9 \u00e0” a slice table running from zero below 800,000 euros, 0.50 per cent between 800,000 and 1,300,000, 0.70 per cent up to 2,570,000, 1 per cent up to 5,000,000, 1.25 per cent up to 10,000,000 and 1.50 per cent above (Article 977 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>), each slice of value taxed at its own rate, with a smoothing reduction where the net base sits between 1,300,000 and 1,400,000 euros: “le montant de l’imp\u00f4t calcul\u00e9 selon le tarif pr\u00e9vu au tableau du 1 est r\u00e9duit d’une somme \u00e9gale \u00e0 17 500 \u20ac-1,25 % P, o\u00f9 P est la valeur nette taxable du patrimoine.” (Article 977 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>). Take a British couple in France with a net base of 1,600,000 euros: 500,000 euros of slice at 0.50 per cent gives 2,500 euros, 300,000 euros at 0.70 per cent gives 2,100 euros, total 4,600 euros. Take a base of 1,350,000 euros: 2,500 plus 50,000 at 0.70 per cent (350) gives 2,850, minus the smoothing (17,500 minus 16,875 = 625), total 2,225 euros. Declare both the gross and the net figures on the yearly return, because the law requires taxpayers to state “la valeur brute et la valeur nette taxable des actifs mentionn\u00e9s \u00e0 l’article 965 sur la d\u00e9claration annuelle pr\u00e9vue \u00e0 l’article 170” with supporting schedules (Article 982 of the Code g\u00e9n\u00e9ral des imp\u00f4ts<\/a>), filed online through your personal tax account, as the official service-public.fr guide to who pays IFI and on what<\/a> confirms for the threshold, the 1 January date and the 30 per cent main-home reduction.<\/p>\n If the figure you filed is wrong, correct it before the office writes to you. A spontaneous correction costs far less than a reassessment, and the valuation file described above is what makes a correction credible: fresh comparables, the loan statement at 1 January, proof of main-home occupation, and the computation slice by slice. If the administration opens the discussion instead, it must send a reasoned reassessment proposal: “L’administration adresse au contribuable une proposition de rectification qui doit \u00eatre motiv\u00e9e de mani\u00e8re \u00e0 lui permettre de formuler ses observations ou de faire conna\u00eetre son acceptation.” (Article L. 57 of the Livre des proc\u00e9dures fiscales, the code of tax procedure<\/a>). Read that letter as your roadmap: it must say what is challenged and why, and you reply point by point, with evidence, inside the deadline, asking for the thirty-day extension the same article allows if you need it. Never ignore it and never accept figures “to move things along”; an acceptance closes doors that a reasoned refusal keeps open.<\/p>\nB. You live in Britain: only your French property counts, valued with no residence discount<\/h3>\n
II. How is the French IFI bill calculated and how do you challenge it?<\/h2>\n
A. Valuing the property, deducting the loans and running the rate scale<\/h3>\n
B. Correcting the return, answering a reassessment and going to court<\/h3>\n