Your avis d’imposition (tax bill) arrives at your Kent address in October, and the figure stops you cold. You own a two-bedroom flat in Paris used for long weekends and summer weeks, and the taxe d’habitation sur les résidences secondaires (council tax on second homes, known as THRS) now carries an extra line worth 60% of the municipal share. A surcharge you never voted for, set by a council you cannot elect since Brexit stripped your local vote in France, on a property whose bins, schools and streetlights you barely use. Is the bill a mistake? Can a British owner refuse the extra 60%, claim an exemption, or take the commune to court? The short answer is that the surcharge is lawful, the highest courts have already upheld the scheme, and the rate itself is almost never defeasible. The longer and more useful answer is that individual bills are frequently wrong on the facts that matter: which dwelling counts as your main home, who really had use of the flat on 1 January, whether one of three statutory exemptions wipes out the extra 60%, and whether your holiday letting actually protects you or traps you. This guide explains how the majoration (surcharge) works, why Paris charges the full 60%, how to file a réclamation (formal complaint) before the 31 December deadline, and which arguments have won or lost before the Conseil d’État (France’s highest administrative court) in 2023, 2024 and 2026.

I. Why Your French Second Home Pays a Surcharge of Up to 60% After Brexit

A. The Legal Machinery Behind the Surcharge: Second-Home Tax, Tense Zones and the Council Vote That Adds Up to 60%

Since the abolition of the tax on main homes, the taxe d’habitation survives only on second homes and other furnished premises not used as a main home. Article 1407 of the General Tax Code (code général des impôts) provides: “I. – La taxe d’habitation sur les résidences secondaires est due pour tous les locaux meublés conformément à leur destination d’habitation autre qu’à titre principal, y compris lorsqu’ils sont imposables à la cotisation foncière des entreprises.” Every furnished dwelling used for residential purposes other than as a main home is caught, and the same article adds an important boundary: “Toutefois, les locaux mentionnés au premier alinéa ne sont pas soumis à cette taxe lorsqu’ils font l’objet d’un usage exclusivement professionnel.” Premises put to exclusively professional use escape the tax altogether. For a British owner this first test already decides plenty of files: a Paris studio genuinely used as a full-time office or surgery with no sleeping accommodation is not a second home at all, while a flat with a bed, a shower and a hob that you visit eight weekends a year plainly is, however modest your use.

The surcharge itself comes from the next article. Article 1407 ter of the same code states: “I. – Dans les communes mentionnées au B du I de l’article 1406 bis, le conseil municipal peut, par une délibération prise dans les conditions prévues à l’article 1639 A bis, majorer d’un pourcentage compris entre 5 % et 60 % la part lui revenant de la cotisation de taxe d’habitation sur les résidences secondaires due au titre des logements meublés.” Three points matter for a British reader. First, the surcharge applies only to the municipal share of the bill, not the whole amount, so a 60% vote does not increase your total by 60%. Second, only councils in designated communes may vote it: the reference to article 1406 bis ties the power to the geography of housing shortage. Third, the rate is a local political choice anywhere between 5% and 60%, which is why your neighbour across the municipal boundary can pay no surcharge at all while you pay the maximum. The Finance Ministry guide confirms the mechanism in plain terms: only municipalities where the annual tax on vacant dwellings (TLV) applies may vote the surcharge, and each council sets its own rate within the statutory 5% to 60% band (official guide to the second-home tax surcharge).

Which communes qualify? The underlying geography is the taxe annuelle sur les logements vacants (annual tax on vacant dwellings, TLV) map. Article 232 of the code provides that this tax applies: “1° Dans les communes appartenant à une zone d’urbanisation continue de plus de cinquante mille habitants où il existe un déséquilibre marqué entre l’offre et la demande de logements entraînant des difficultés sérieuses d’accès au logement sur l’ensemble du parc résidentiel existant, qui se caractérisent notamment par le niveau élevé” of rents and prices. The Finance Act for 2023 then extended the map far beyond the big conurbations: as the Conseil d’État summarised, the tax became applicable “2° Dans les communes ne respectant pas les conditions prévues au 1° du présent I où il existe un déséquilibre marqué entre l’offre et la demande de logements entraînant des difficultés sérieuses d’accès au logement sur l’ensemble du parc résidentiel existant, qui se caractérisent notamment par le niveau élevé des loyers, le niveau élevé des prix d’acquisition des logements anciens ou la proportion élevée de logements affectés à l’habitation autres que ceux affectés à l’habitation principale par rapport au nombre total de logements”, with a decree fixing the list of communes. That extension decree of 25 August 2023 swept hundreds of tourist and mountain communes into the scheme, which is precisely why many British owners of Alpine chalets and coastal cottages discovered the surcharge line for the first time on their 2024 and 2025 bills. You can check whether your commune is on the list with the official simulator linked by the Finance Ministry: Vérifiez si votre commune est concernée.

British owners should understand one honest limit before spending money on lawyers: the extension of the scheme has already been challenged at the highest level and survived. Mountain residents’ associations and four second-home owners asked the Conseil d’État to annul the August 2023 decree and referred a priority constitutional question (question prioritaire de constitutionnalité) arguing inequality and excessive burden. The court refused to refer the constitutional question and rejected the whole application: “Article 2 : La requête de la Fédération des associations de résidents des stations de montagne et autres est rejetée.” (CE, 8th and 3rd chambers combined, 21 December 2023, No. 488601). Two holdings from that judgment shape every later strategy. First, small communes cannot complain that they were swept in alongside big cities, because “c’est la loi elle-même qui prévoit d’apprécier l’existence d’un déséquilibre marqué entre l’offre et la demande de logements uniquement à l’échelle des communes.” The housing imbalance is assessed commune by commune, with no duty to carve out low-pressure neighbourhoods within a listed commune. Second, the court found nothing establishing that Parliament had used irrational criteria or imposed an excessive burden on a class of taxpayers. In practical terms, arguing that the zone list is unfair, or that British second-home owners as a group are overtaxed, is a spent force. Winnable cases attack your individual assessment, not the scheme.

Brexit itself changed none of this tax machinery: nationality is irrelevant to the THRS, and a French national with a Paris pied-à-terre pays exactly the same surcharge as you. What Brexit changed is your procedural position around the bill. You no longer vote in French municipal elections, so you cannot punish the council that voted 60%. Your avis is posted to a British address and can arrive late or not at all. You manage the file from abroad, in French, through the impots.gouv.fr personal account, and any evidence of where you actually live must now be assembled across two countries. None of that alters the tax due, but all of it affects whether an error goes unnoticed and whether your complaint lands in time.

B. Paris and Île-de-France: Where the Full 60% Rate Hits British Owners Hardest

Paris applies the maximum. The City’s official tax page confirms that Paris applies the surcharge at the full 60% rate on the municipal share (Paris official tax page). The legal basis cited is article 1407 ter, applicable in communes in a continuous urban area of over 50,000 inhabitants with a marked housing imbalance. Paris is unusually open about the policy purpose, presenting the surcharge as a response to the housing shortage and an incentive for second-home occupiers either to move back in full-time or to put the flat back on the rental market as someone’s main home. The surcharge is meant to push pied-à-terre owners either to move in full-time or to let the flat as someone’s main home. For a British owner who keeps a Saint-Germain studio for monthly business trips or a Marais flat for the children’s university years, the message is blunt: occasional personal use is exactly the behaviour being taxed at the top rate.

The arithmetic deserves a worked example because bills confuse even French readers. Suppose the municipal share of your Paris THRS is 1,000 euros. The 60% majoration adds 600 euros to that share. Intercommunal and other additions sit beneath, and the surcharge itself is calculated only on the part going to the commune. Check the bill lines one by one rather than comparing the cash total with last year: a jump can come from the rate vote, from a revaluation of the valeur locative (the notional rental value that is the tax base), or from both. If the valeur locative moved sharply while the flat did not change, that second line of attack, the base rather than the rate, belongs in your complaint alongside the surcharge.

Across the rest of Île-de-France the picture is patchwork, which is why the commune check matters street by street. Many inner-suburb communes in the tense zone have voted the surcharge at various rates, while communes outside the designated geography cannot vote it at all. A British family choosing between a flat in Boulogne-Billancourt and one just over the boundary should price the surcharge into the purchase arithmetic like any other carrying cost, next to the taxe foncière (property ownership tax) and service charges. The broader October billing mechanics, what each line of the autumn bill means and which deadlines apply to foreign owners generally, are explained in this companion guide to the October second-home tax bill for foreign owners; the present article goes further on the specifically British file, the Paris maximum rate, the three statutory exemptions and the case law that decides real disputes.

Paris also publishes the three situations in which the surcharge can be lifted on complaint, mirroring the national statute: the flat kept near the workplace by someone whose job forces them to live away from their main home; the former main home kept by an elderly person or someone needing long-term care who has moved permanently into a qualifying care establishment; and the owner prevented for reasons beyond their control from putting the dwelling to main-home use, with partial relief granted case by case by the tax office (Paris exemptions on complaint). The Finance Ministry states the same trio nationally: professional constraint forcing residence away from the main home; exclusive use kept of the former main home after a permanent move into long-term care; and impossibility beyond the owner’s control, such as dilapidated premises lacking the fittings for lasting everyday occupation or a dwelling genuinely offered for sale or rent at the market price that finds no buyer and no tenant. For British owners the first case covers the executive posted to Paris whose family home stayed in Surrey; the third covers the Dordogne house genuinely on the market at a realistic price that finds no buyer. Both need documentary proof, not bare assertion, as Part II explains.

II. How a British Owner Checks the Bill and Challenges the Surcharge

A. Reading Your Autumn Bill, Paying Without Losing Your Rights, and Filing the Réclamation Before 31 December

Start with the two anchor rules that decide every file. First, the taxpayer: “I. – La taxe est établie au nom des personnes qui ont, à quelque titre que ce soit, la disposition ou la jouissance des locaux imposables.” Whoever has use or enjoyment of the taxable premises on the reference date pays, owner or not. Second, the reference date: “La taxe foncière sur les propriétés bâties, la taxe foncière sur les propriétés non bâties et la taxe d’habitation sur les résidences secondaires sont établies pour l’année entière d’après les faits existants au 1er janvier de l’année de l’imposition.” The whole year’s tax turns on the facts as they stood on 1 January. Sold the flat in March? You still owe the full year’s THRS. Moved in permanently on 2 January? The previous year’s second-home status still stands for that year’s bill. Bought in February and received a full-year bill in your name? The 1 January rule is your first ground for discharge, because the seller held use on the reference date.

Bills arrive in autumn in your impots.gouv.fr personal account and, for owners without online access, by post to the address the tax office holds, often a British one. Open the bill the day it appears and verify four things in order: the address and cadastral reference of the premises, the occupancy status coded by the administration (second home versus main home), the valeur locative base, and the surcharge line with its percentage. Cross-check the occupancy coding against your 1 January reality: a flat you had already let unfurnished year-round as someone’s main home should not be coded as your second home at all, while a flat sitting empty between holiday stays is correctly coded as a second home even if you slept there only twenty nights. Photograph or download every page, keep the envelope if posted, and note the date de mise en recouvrement (collection date) printed on the notice, because every deadline runs from it.

Paying does not surrender your right to complain, and not paying does not preserve it. The complaint procedure is mandatory and preliminary: article R*190-1 of the Tax Procedure Book (livre des procédures fiscales) provides: “Le contribuable qui désire contester tout ou partie d’un impôt qui le concerne doit d’abord adresser une réclamation au service territorial, selon le cas, de la direction générale des finances publiques ou de la direction générale des douanes et droits indirects dont dépend le lieu de l’imposition.” You must complain to the tax office first; no court will hear you before that step. The deadline is strict: “Pour être recevables, les réclamations relatives aux impôts directs locaux et aux taxes annexes doivent être présentées à l’administration des impôts au plus tard le 31 décembre de l’année suivant celle, selon le cas : a) De la mise en recouvrement du rôle, de la notification d’un avis de mise en recouvrement ou de l’émission d’un titre de perception ;” In plain terms, for a bill collected in autumn 2026 you have until 31 December 2027. Miss that date and the bill becomes final however wrong it is, subject only to narrow revision routes outside this guide.

File with the Service des impôts des particuliers (personal tax office, SIP) for the place where the property sits, not your UK tax office and not the office of your French main home if you have one elsewhere. The Finance Ministry directs surcharge-exemption requests exactly there: to the personal tax office of the place where the second home is located (where to file the surcharge claim). In practice you have three channels: the secure messaging (messagerie sécurisée) inside your impots.gouv.fr personal account, which can also be filed from the secure messaging area of the taxpayer’s Finances Publiques online account; a letter on plain paper to the tax centre whose address appears on the bill, stating names, address, grounds and attaching evidence; or a visit with an appointment. Online filing from a British IP address works, but create and test your impots.gouv.fr access well before December, because activation letters and verification codes can take weeks to reach a UK address. State precisely what you seek for each premises: full discharge of the THRS, discharge of the surcharge only, or reduction of the base, since each asks the office for something different.

Two warnings that catch British owners every year. First, file the complaint and pay the bill in parallel, because late payment is punished automatically: article 1730 of the General Tax Code provides: “1. Donne lieu à l’application d’une majoration de 10 % tout retard dans le paiement des sommes dues au titre de l’impôt sur le revenu, des contributions sociales recouvrées comme en matière d’impôt sur le revenu, de la taxe d’habitation sur les résidences secondaires , des taxes foncières sur les propriétés bâties et non bâties, des impositions recouvrées comme les impositions précitées et de l’impôt” Unpaid THRS therefore grows by 10% while you argue, on top of monthly late interest, so diarize the payment deadline printed on the notice separately from the complaint deadline. Second, the office must decide within a bounded time: article R*198-10 of the Tax Procedure Book states: “La direction générale des finances publiques ou la direction générale des douanes et droits indirects, selon le cas, statue sur les réclamations dans le délai de six mois suivant la date de leur présentation.” If it cannot decide in time it must warn you before expiry and set an additional period, with the proviso that “Ce délai complémentaire ne peut, toutefois, excéder trois mois.” and “En cas de rejet total ou partiel de la réclamation, la décision doit être motivée.” Silence at six months lets you go to court without waiting longer: article R*199-1 provides that “L’action doit être introduite devant le tribunal compétent dans le délai de deux mois à partir du jour de la réception de l’avis par lequel l’administration notifie au contribuable la décision prise sur la réclamation, que cette notification soit faite avant ou après l’expiration du délai de six mois prévu à l’article R. 198-10 .” adding that “Toutefois, le contribuable qui n’a pas reçu la décision de l’administration dans un délai de six mois mentionné au premier alinéa peut saisir le tribunal dès l’expiration de ce délai.” The administrative tribunal (tribunal administratif) of the property’s location must be seized within two months of an express or implied refusal. The two-month rule is general procedural law: article R421-1 of the Administrative Justice Code states: “La juridiction ne peut être saisie que par voie de recours formé contre une décision, et ce, dans les deux mois à partir de la notification ou de la publication de la décision attaquée.” Diarise both dates the day you file: the six-month reply horizon and the two-month court window that follows a refusal.

B. The Grounds That Actually Win: the Three Statutory Exemptions, Occupancy Errors, and the Holiday-Letting Trap

The strongest files invoke one of the three statutory exemptions from the surcharge, with proof attached. Professional constraint covers the British executive whose employer requires residence near the Paris workplace while the family home remains in Britain: attach the employment contract or posting letter, proof of the British main home, and evidence that the French flat serves the posting. Long-term care covers the owner who kept exclusive use of the former main home after moving into residential care: attach the care-home contract and proof that nobody else occupies the flat. Cause beyond your control covers the flat genuinely offered for sale or let at the market price that finds no taker, and dilapidated premises lacking the fittings for lasting everyday occupation: attach the estate agent’s mandate at a realistic price, listings history, and dated correspondence showing viewings without offers. Assertions without documents fail; the Paris tax office grants these reductions case by case, and the file that wins is the file that reads like an audit pack, indexed, dated and in French or with translations.

The second family of grounds attacks the occupancy coding itself, and here a July 2026 Conseil d’État ruling helps British owners more than any other recent decision. A Lyon taxpayer fought two years of second-home bills arguing her Lyon flat was really her main home, while her joint income-tax return with her husband showed a different address. The court laid down the method every tax judge must follow: “La résidence principale, au sens de ces dispositions, s’apprécie au regard de la situation de chaque contribuable, sans qu’y fasse obstacle la circonstance qu’il soit soumis à une imposition commune à l’impôt sur le revenu en application des dispositions du 1 de l’article 6 du code général des impôts.” Main-home status is assessed person by person, and a joint tax return address does not conclude the question. More strikingly, “il ne saurait être présumé que cette adresse est, sauf preuve contraire apportée par le contribuable, celle de sa résidence principale pour l’établissement de la taxe d’habitation.” The address on your income-tax return is only one piece of evidence among others; it cannot be treated as a presumption that you must rebut. The taxpayer in that case still lost, the court finding the lower tribunal’s overall assessment of passports, vehicle registration, chequebooks, payslips and insurance endorsements free of distortion: “Article 1er : Le pourvoi de Mme A… est rejeté.” (CE, 9th and 10th chambers combined, 7 July 2026, No. 506653). The lesson for a British owner is twofold and practical. If the administration coded your French flat as a second home merely because your income-tax return shows a London address, that reasoning alone is legally insufficient after this ruling. But you will only displace the coding with a coherent bundle spanning both countries: council tax bills and GP registration in Britain for the UK main home, or conversely French utility consumption, insurance, bank correspondence and travel records proving genuine main-home occupation in France. Single documents do not win; convergent bundles do.

The third ground is really a trap to avoid, and it catches British owners who let their second home to holidaymakers. Many assume that weeks on Airbnb take the flat outside the tax. A December 2024 ruling says the opposite for seasonal letting: “lorsqu’un logement meublé fait l’objet de locations saisonnières ou de courte durée, le propriétaire du bien est redevable de la taxe d’habitation dès lors qu’au 1er janvier de l’année de l’imposition, il peut être regardé comme entendant en conserver la disposition ou la jouissance une partie de l’année.” Owners of three classified gîtes (holiday cottages) in Brittany, let repeatedly through online platforms with high occupancy, argued the intensity of letting proved they kept no personal use. The court held that the very freedom to accept or refuse bookings through the year proves the owner kept use of the property, annulled the discharge the lower court had granted, and kept the bills in place: “Article 1er : Le jugement du 29 décembre 2023 du tribunal administratif de Rennes est annulé.” (CE, 8th chamber, 23 December 2024, No. 492174). For a British owner with a Provençal villa on a rental platform, the message is that seasonal letting income and the THRS bill coexist: the letting does not erase the tax, and the rental profits remain separately declarable. The only letting-related escape with a statutory footing is narrow: in designated rural revitalisation areas, communes may exempt guest rooms and classified tourist furnished lettings on prior declaration form 1205-GD sent to the tax centre no later than 1 March of the year, as the Finance Ministry explains: the exemption requires prior form 1205-GD sent to the local public-finance centre no later than 1 March of the relevant year (rural tourist-letting exemption procedure). Outside those zones and that deadline, do not promise yourself an exemption the statute does not contain.

Three further errors appear regularly in British files and each is checkable from your desk in London. A full-year bill in the name of a buyer who acquired after 1 January offends the reference-date rule quoted above; the seller held use on 1 January and the bill belongs to the seller. A bill on premises converted to exclusively professional use before 1 January offends the professional-use exclusion in article 1407. A bill calculated on a valeur locative that jumped without works, extension or reclassification deserves a line-by-line comparison with prior years and, where the base moved inexplicably, a targeted complaint on the base as well as the surcharge. Conversely, do not waste the 31 December deadline on the two arguments the courts have already buried: that your commune should never have joined the tense-zone list, and that the surcharge is unconstitutional as a matter of equality or ability to pay. The December 2023 ruling rejected both at the level of principle, and a tribunal will apply that precedent to your file in a paragraph.

When the SIP refuses expressly or stays silent for six months, the tribunal file should be assembled like a barrister’s bundle. Your application states each head of claim separately with its legal basis: discharge of the surcharge under the applicable exemption with exhibits, or discharge of the whole THRS for miscoding with the occupancy bundle, or reduction of the base with comparative valuations. Attach the bill, proof of the filing date of your complaint, the refusal or proof of silence, and every exhibit already sent to the office, because the judge decides on the papers and rarely holds a long hearing in tax cases. Ask in the alternative: full discharge first, partial relief second, so a judge sympathetic on one point but not the other can still cut the bill. And respect the two-month window from refusal without fail, since late tribunal applications in tax matters are rejected without examination of the merits, however strong the underlying file.

Conclusion

The 60% surcharge on your French second home is not a Brexit penalty and not an administrative error in the ordinary case: it is a lawful municipal surcharge, voted within a 5% to 60% band, validated by the Conseil d’État in December 2023, and applied at the maximum in Paris as a deliberate incentive to return dwellings to full-time housing. Your leverage lies elsewhere, in the individual facts the computer that generated your bill never verified. Check the 1 January position, the occupancy coding and the rental-value base the day the autumn bill lands. File a documented réclamation with the property-area tax office before 31 December of the following year, after paying the bill to stop penalties accumulating. Claim one of the three statutory exemptions with an audit-grade evidence pack where the facts fit. Correct miscoded main homes with a cross-border bundle of convergent proof, remembering that your income-tax return address is only one clue among many since the July 2026 ruling. Never assume holiday letting erases the tax, since the December 2024 gîtes ruling taxes owners who keep control of bookings. And leave the constitutional challenge to history: the mountain-communes case lost, and your file wins on evidence, deadlines and the precise wording of the statute, not on the fairness of the scheme.