Owning a furnished house or flat in France does not become tax-free because the owner lives in the United Kingdom, holds a British passport or visits only during holidays. The French charge that causes the most confusion is the taxe d’habitation sur les résidences secondaires: the residence tax on second homes. It is different from taxe foncière, the annual land and building tax charged to the owner, and it is still imposed on a furnished French home that is not the owner’s main home.

Brexit has changed immigration and travel rules, but it has not removed French local taxes attached to a home situated in France. A British owner can therefore receive an assessment even when the owner is not French tax resident, files a UK tax return, pays council tax in the United Kingdom or has never rented the French property. The decisive questions are more concrete: who had the property at their disposal on 1 January 2026, how was the property furnished and occupied, what information was recorded in the French property portal, and does the bill include a local surcharge?

This article follows the route a UK owner can use to check a 2026 assessment, identify a genuine error and submit a defensible claim. It explains the French words that appear on the notice, the evidence that matters when the owner lives abroad, the distinction between a tax return and an occupancy declaration, and the steps to take if the French tax office rejects the request.

I. Do UK owners pay taxe d’habitation on a French second home after Brexit?

A. Who is liable on 1 January, and what counts as a furnished second home?

The starting rule is in Article 1407 of the French General Tax Code, the Code général des impôts (CGI). Its current wording provides: « 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 ». In English, the tax is due for furnished premises intended for residential use other than as a main home. The rule applies to the category of property, not to the nationality of the person who owns it.

The French administration uses résidence secondaire for a home that is not the taxpayer’s résidence principale, or main residence. A holiday cottage, a furnished flat used for weekends, a home kept available for family visits and a furnished property retained while the owner lives in Britain can all fall within the rule. The term does not mean that the owner must spend a minimum number of nights there. A person who rarely enters the property may still have its free use and therefore be liable.

The taxable premises can include immediate outbuildings. A private garage, parking space or other dependency can be included when it is attached to or used with the residence. Article 1407 also excludes a local used exclusively for professional purposes. That exception must be proved by the actual use and the facts recorded by the administration; describing a home as an office in an email is not enough where it remains furnished and available for private accommodation.

Article 1408 of the CGI identifies the person assessed. It states: « La taxe est établie au nom des personnes qui ont, à quelque titre que ce soit, la disposition ou la jouissance des locaux imposables ». The official Article 1408 text therefore reaches a person who has the disposal or enjoyment of the premises, not only a registered freehold owner. An usufructuary, a person holding a right of use or a tenant who has a furnished second home for the year may need to examine the assessment in their own name.

For a British freehold owner, the practical consequence is straightforward. If the French house was furnished and available to the owner on 1 January 2026, the owner will normally be the person named on the notice, even if the owner’s permanent home was in England, Wales, Scotland or Northern Ireland. The French tax authority confirms in its English guidance that a person who is not French tax resident but owns one or more homes in France is liable for the residence tax on second homes. That guidance is available on impots.gouv.fr’s non-resident local-tax page.

The date is important because Article 1415 of the CGI provides: « 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 tax is assessed for the whole year by reference to the facts existing on 1 January. A sale completed on 15 February 2026 will not usually undo a 2026 liability if the seller still had the furnished property at their disposal on 1 January. Conversely, a sale completed before 1 January may support a claim if the administration still treats the former owner as having the property.

The same principle matters where a British family moved into the French home during 2025 or early 2026. A property can move from second home to main residence, but the owner must be able to show the date and the reality of the change. The French tax authority will not decide the issue solely from the owner’s passport, a visa or a UK council-tax bill. It will look at the home in France, the family’s living arrangements and the evidence for the relevant date.

A recent decision gives a useful evidential warning. In Conseil d’État, 7 July 2026, no. 506653, the court held that « La résidence principale, au sens de ces dispositions, s’apprécie au regard de la situation de chaque contribuable ». It also held that the address shown on an income-tax return is one element, but cannot automatically be presumed to be the main residence. The judgment concerned a French taxpayer, not a British owner, but the rule is highly relevant to an international file: a declared address is evidence, not an automatic answer.

Brexit does not replace this property-based rule with a special British regime. The UK government’s guidance for British nationals buying property in France identifies taxe d’habitation and taxe foncière as French property taxes. Its Council Tax guidance describes a separate UK system for a second home in the United Kingdom. UK Council Tax and French taxe d’habitation are not the same assessment, and payment of one does not create a credit against the other.

The France–UK double-taxation convention should not be used as a blanket exemption. The convention deals mainly with taxes on income and capital and with the allocation of taxing rights between the two states. It does not turn a furnished French home into a non-taxable property. The GOV.UK publication of the 2008 UK–France convention is useful for income and residence questions, but the French local-tax liability must first be tested under the CGI provisions governing the property.

The owner should also keep taxe foncière separate from taxe d’habitation. The former is linked to ownership of the French land and buildings. The latter, for a second home, is linked to the furnished residential premises and the person who has their disposal or enjoyment. A single property can generate both notices. A dispute about the cadastral description, ownership or surface area may affect both taxes, but a request to correct one notice does not automatically correct the other.

B. What must a British owner declare in GMBI, and why can the wrong status trigger a bill?

The occupancy declaration is not the same document as the annual income-tax return. French owners and certain other persons responsible for a dwelling use the online property service known as Gérer mes biens immobiliers, or GMBI, which means “Manage my property”. The relevant screen is generally found in the owner’s secure Finances publiques account under “Biens immobiliers”, meaning “Real estate”.

Article 1418 of the CGI requires owners of residential premises to declare information about the nature of the occupation before 1 July each year, subject to the statutory exemptions where no information has changed. The article refers to the owner’s enjoyment, third-party occupation, the beginning and end dates of occupation, the identity of occupants and, where relevant, the rental manager. The current official text is broader than a simple tick box saying “holiday home”.

For the 2026 cycle, the French tax authority states that a new owner or an owner whose information changed between 2 January 2025 and 1 January 2026 must update the occupation information before 1 July 2026. Its page on the occupancy declaration explains that the administration needs to know whether the property is occupied by the owner, made available to somebody else or vacant. If no relevant change occurred, the pre-filled information may be carried forward, but it should still be checked.

This creates a common problem for British owners. A property may have been described in an earlier French record as a main residence because the owner lived there before returning to the UK. The property may then appear as a second home after Brexit. Another owner may have moved to France but failed to update GMBI after making the French house the family’s habitual home. A third may have let the property furnished for part of the year but kept private use for the remainder. Each fact can change the correct answer, and the administration may use the declaration to prepare the notice.

The owner should check at least these fields:

• the exact address and property identifiers;
• whether the premises are furnished sufficiently for habitation;
• whether the owner retains personal enjoyment;
• whether a tenant, relative or other person occupies the home;
• the start and end dates of a lease or free occupation;
• whether the property was vacant and unfurnished on 1 January;
• whether a sale, purchase, move or change of use occurred before 1 January 2026.

The declaration can have financial consequences if it is omitted or inaccurate. Article 1770 terdecies of the CGI provides: « La méconnaissance de l’obligation prévue au I de l’article 1418 entraîne l’application d’une amende de 150 € par local ». The same article also covers an omission or an inaccuracy, subject to its final limitation where another higher penalty applies. The risk is therefore not merely that the tax office will ask for an update; a failure to communicate the required information can produce a separate penalty.

An owner living abroad should not guess at the French classification from the English words “second home”. The following distinctions can matter:

• A furnished home kept for the owner’s holidays is normally a second home.
• A furnished home occupied by a tenant as that tenant’s main home may not produce the owner’s second-home tax in the same way, although the occupancy and tenancy must be correctly declared.
• A property genuinely stripped of furniture and not habitable on 1 January may require a different analysis, including the possible rules for vacant premises.
• A home used by a family member free of charge still requires a declaration of the mode of occupation; free use does not automatically make the property a main residence of the owner.
• A home that the owner began using as the family’s real main residence must be supported by evidence of that move, not just by a change in a portal field.

Useful evidence includes the French residence permit or visa file, the date of the move, utility consumption, insurance, a French tenancy or sale document, school or employment records, medical or registration records, travel records and the address used in tax filings. A UK council-tax record, electoral record or utility bill can help show that the owner retained a UK home, but it may also support the French tax office’s view that the French property was a second home. Evidence has to be read as a whole.

The property portal is not a substitute for the notice. After the assessment is issued, download the avis d’impôt, or tax notice, and compare the address, the persons liable, the number of premises, the cadastral basis, the municipal rates and any majoration, meaning surcharge. Take a screenshot or PDF of the GMBI record at the time of the correction. Keep the submission receipt and all messages in the secure mailbox. A later correction without proof of what was originally recorded may leave an avoidable evidential gap.

For a British owner without reliable internet access or with a French account problem, the official process can also involve contacting the relevant tax office by post or at the counter. The address is normally shown on the notice. Do not send a local-tax claim only to the non-resident income-tax department because the taxpayer’s income-tax file is handled there. The local tax office for the property is the proper first contact for a French property assessment.

II. How do you check, reduce or challenge a 2026 bill?

A. How is the amount calculated, and when can the municipal surcharge apply?

The notice is not calculated from the price that the British owner paid for the property or from the current estate-agent value. The starting point is the valeur locative cadastrale, the cadastral rental value: an administrative rental base assigned to the premises and its dependencies. The amount is then calculated using the rates voted by the relevant local authorities, together with any lawful surcharge or relief. Service Public explains the basic calculation on its official page for taxe d’habitation on second homes.

This is why two furnished homes in neighbouring villages can receive very different notices. The size and characteristics of the property, the dependencies, the local rate and the municipality’s status all matter. A British owner who believes the amount is high should ask the tax office for the calculation elements rather than rely on a comparison with a friend’s bill. The French administration itself states that it is not possible to estimate the exact amount without the relevant property data.

Some eligible municipalities can add a majoration de taxe d’habitation, a surcharge on the residence tax for second homes. Article 1407 ter of the CGI permits, in the areas and conditions defined by the Code, a municipal increase between 5% and 60% of the local share. The official text also provides specific situations in which a taxpayer can claim relief from the surcharge, including a professional residence near the place of work, the former main home of a person placed in long-term care and a situation where the home cannot be used as a main residence for a cause outside the person’s control.

The surcharge is not a Brexit penalty. It can apply to a British owner because the home is located in a municipality that has adopted the relevant decision and the statutory conditions are met. A claim should therefore separate two issues: whether the base residence tax is due at all, and whether the extra local surcharge is lawful in the owner’s particular situation.

Possible factual grounds for a review include:

• the home was the owner’s genuine main residence on 1 January 2026;
• the owner no longer owned or enjoyed the property on that date;
• the premises were not furnished sufficiently for habitation;
• the premises were occupied under a lease in a way that changes who had disposal or enjoyment;
• the property description or dependencies are wrong;
• the local surcharge was applied even though a statutory relief applies;
• the property is in a zone or category benefiting from a local exemption that has been properly claimed.

The last category needs care in 2026. Service Public notes particular rules for France ruralités revitalisation areas, known as ZFRR, and for certain tourist accommodation or guest rooms when the local authority has adopted the required decision. A furnished holiday home owned by a British person is not automatically exempt merely because it is in a rural commune, listed as a tourist rental or used only for a few weeks. Check the municipality’s decision, the classification of the accommodation and the filing date for the relevant exemption form.

The owner should also avoid confusing a furnished second home with a vacant, unfurnished property. A furnished property can remain liable for the second-home tax even when nobody sleeps there for much of the year. An unfurnished property that is genuinely vacant can fall under a different local-tax regime, depending on its location and the period of vacancy. The correct classification must be proved at the relevant date.

The recent case of Conseil d’État, 19 November 2024, no. 487770 illustrates how evidence is assessed. The court refused to treat the address stated on an income-tax declaration as conclusive proof of the main residence. It examined the overall evidence, including documents such as a passport, vehicle registration, cheque book, payslips and insurance records. The lesson for a British owner is not that one particular document always wins; it is that a serious challenge should show a coherent factual picture on 1 January.

The UK side still matters as evidence and compliance, but not as a substitute for the French calculation. The GOV.UK guide to living in France recommends using French authorities for French tax questions and explains that the UK–France double-taxation agreement concerns income and other cross-border tax questions. Keep the French local-tax notice separate from UK Self Assessment, council tax, non-resident landlord records and any UK property sale file. If a UK property is also occupied as a home, record which property was the family’s real main residence during the relevant period; do not assume that the phrase “second home” has identical legal effects in both countries.

B. How do you file a defensible claim from the UK and go to court if necessary?

A claim against a tax notice is a réclamation contentieuse, a formal administrative tax claim. It is not merely an informal message saying that the bill seems unfair. Begin by saving the notice and preparing a short chronology:

1. Identify the property, the person named on the notice and the tax year.
2. State where the owner and family actually lived on 1 January 2026.
3. State who had the property’s disposal and how it was furnished.
4. Identify any sale, purchase, move, tenancy, vacancy or change of use.
5. Explain the specific correction sought: cancellation, reduction, removal of the surcharge or correction of the property record.
6. Attach documents in a numbered bundle and refer to each document in the explanation.

The claim is normally sent through the secure messaging service in the French espace Finances publiques, using the tax-notice category for Réclamation/Contestation. It can also be sent by post to the tax office whose address appears under “Vos contacts” on the notice. The official French tax guidance confirms that a non-resident’s local taxes are managed by the office where the property is located, even where the person’s income-tax file is handled by the non-resident department.

The legal form of the claim matters. Article R*197-3 of the LPF requires the claim to identify the assessment, give a short statement of the grounds and the relief sought, carry the claimant’s signature, and include the notice or a copy of it. The same provision indicates that a claim concerning local taxes is presented separately for each municipality. If a British owner has homes in two communes, one general letter may not protect both assessments.

The evidence bundle should be tailored to the ground of the claim. For a sale, include the completion deed and proof that the transfer occurred before 1 January. For a move into the French home, include the date of actual occupation, utility evidence, insurance, family records and documents showing that the home became the habitual base. For a lack of furniture, provide dated photographs, inventory or removal records and evidence about the condition of the premises. For a tenancy, provide the signed lease, the start date, the furnished or unfurnished description and the tenant’s occupancy information. For an incorrect surcharge, identify the statutory exemption and provide the documents showing why it applies.

The time limit should be calculated before sending the complaint. Article R*196-2 of the LPF provides that claims about local direct taxes and related taxes must generally be presented by 31 December of the year following the relevant event, including the collection of the assessment. For a 2026 notice issued in the ordinary way, 31 December 2027 will commonly be the outer date, but the precise starting event and any special rule must be checked. Do not wait until the final week, particularly where documents need certified translation or a French representative.

The claim itself does not automatically stop collection. If the owner wants to defer the disputed payment, the request must be made expressly and must state the amount or the tax base for which a reduction is sought. Article L277 of the LPF provides: « Le contribuable qui conteste le bien-fondé ou le montant des impositions mises à sa charge est autorisé, s’il en a expressément formulé la demande dans sa réclamation et précisé le montant ou les bases du dégrèvement auquel il estime avoir droit, à différer le paiement ». In English, a taxpayer who contests the basis or amount can defer the disputed part if the request is expressly included and properly quantified. Guarantees can be required for larger disputes.

This point is practical as well as legal. If the owner simply stops a direct debit or ignores the payment date, the French tax office may treat the tax as unpaid while the claim is being examined. The safer file contains both the formal claim and a separate, clearly worded application for a sursis de paiement, meaning a suspension or deferral of payment of the disputed amount. Keep confirmation that the request was sent and do not assume that a general request for help has the same effect.

The administration may request further documents. Answer in the secure mailbox, keep the original French text of every question, and send a concise response linked to the evidence bundle. If the administration corrects only the GMBI record but leaves the notice unchanged, ask for a written position on the tax year and the amount. A future correction does not necessarily cancel an assessment that was lawfully based on the facts at 1 January.

If the claim is rejected or only partly accepted, Article L199 of the LPF provides that an unsatisfactory decision on a claim concerning direct taxes can be brought before the tribunal administratif, the administrative court. The judicial route is not a fresh opportunity to make a general complaint about France’s tax policy. It is a legal challenge to the assessment, the factual classification, the calculation, the surcharge or the administration’s response. The rejection decision and its appeal information should be reviewed immediately because court deadlines can be shorter and more formal than the tax-claim deadline.

The strongest court file is usually the one that makes the 1 January question easy to answer. A chronological bundle can contain:

• the tax notice and the GMBI record;
• the purchase or completion deed and any sale deed;
• the lease, inventory and proof of the tenant’s main residence where relevant;
• utility readings and dated invoices;
• home insurance and evidence of the address used for ordinary life;
• residence documents, travel records and family-location evidence;
• photographs or reports showing whether the property was furnished and habitable;
• correspondence with the tax office and proof of the claim’s submission;
• a calculation showing the tax and the exact surcharge being challenged.

Documents in English may need a French translation if the tax office or court cannot assess them. The owner should keep the original and the translated copy, record who translated it and avoid silently changing dates or addresses when summarising the document. A short explanatory table in English can help the client, but the formal submission should be prepared for the French authority and use the terminology appearing on the notice.

Internal consistency is more valuable than volume. A British owner who says the French home was the main residence should explain the UK home, the family’s location, the travel pattern, the tax residence position and the date of the move. A claim that relies only on the fact that the owner “spent little time” in France may fail because use is not the sole test. A claim that a French property was “empty” should address furniture, availability and the precise condition on 1 January. The evidence should answer the legal test rather than repeat the desired conclusion.

Our broader guide to French property tax for UK owners after Brexit covers the separate relationship between taxe foncière, local assessments and payment. The present article is narrower: it is about the furnished second-home residence tax, the occupation record and the route to contesting a wrong 2026 bill.

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Conclusion

For a British owner, the key question is not whether Brexit created a new French tax. It is whether a furnished French home was available as a residence, and to whom, on 1 January 2026. Articles 1407, 1408 and 1415 of the CGI make the property, the person with its disposal and the reference date central. Article 1418 makes the occupancy record important, while Article 1770 terdecies creates a specific risk for an omitted or inaccurate declaration.

If the notice is wrong, update the GMBI record, preserve the original data, submit a formal claim to the tax office for the property, attach a coherent evidence bundle and request payment deferral expressly if needed. Observe the local-tax time limit and keep the proof of submission. If the administration maintains the assessment, the dispute can move to the tribunal administratif. A well-prepared UK owner’s file should make the facts on 1 January clear and connect each requested correction to the applicable French rule.