You bought a flat in Lyon, a village house in the Dordogne or a studio in Paris before Brexit, and you now let it while living in London, Manchester or Edinburgh \u2014 or while settled in France yourself. Every spring the same questions return: where do you declare the rent, which French regime applies, do French social charges apply on top of income tax, and will HM Revenue & Customs tax the same rent again? Since the United Kingdom left the European Union, the tax mechanics have not changed \u2014 France still taxes rents from French property first \u2014 but your administrative position has: you are now a third-country national, your social security affiliation must be proved rather than presumed, and every relief depends on paperwork filed on time. This guide explains, step by step, how a British landlord declares French rental income, how to choose between the simplified micro regimes and the actual-expenses regimes, when French social charges are genuinely due, how the France\u2013United Kingdom double tax treaty of 19 June 2008 prevents double taxation, and which remedies exist when the tax office or URSSAF gets it wrong. French legal terms are explained as they appear.<\/p>\n
An unfurnished letting (location nue) of a French property produces what French tax law calls revenus fonciers<\/em>, literally property income. The starting point is Article 14 of the French General Tax Code (Code g\u00e9n\u00e9ral des imp\u00f4ts)<\/a>, which provides: \u201cSous r\u00e9serve des dispositions de l’article 15 , sont compris dans la cat\u00e9gorie des revenus fonciers, lorsqu’ils ne sont pas inclus dans les b\u00e9n\u00e9fices d’une entreprise industrielle, commerciale ou artisanale, d’une exploitation agricole ou d’une profession non commerciale : 1\u00b0 Les revenus des propri\u00e9t\u00e9s b\u00e2ties, telles que maisons et usines, ainsi que les revenus : a De l’outillage des \u00e9tablissements industriels attach\u00e9 au fonds \u00e0 perp\u00e9tuelle demeure, dans les conditions indiqu\u00e9es au premier paragraphe de l’article 525 du code civil ou reposant sur des fondations sp\u00e9ciales faisant corps avec l’immeuble ; b De toutes installations commerciales ou industrielles assimilables \u00e0 des constructions ; c Des bateaux utilis\u00e9s en un point fixe et am\u00e9nag\u00e9s pour l’habitation, le commerce ou l’industrie, m\u00eame s’ils sont seulement retenus par des amarres. 2\u00b0 Les revenus des propri\u00e9t\u00e9s non b\u00e2ties de toute nature, y compris ceux des terrains occup\u00e9s par les carri\u00e8res, mines et tourbi\u00e8res, les \u00e9tangs, les salines et marais salants.\u201d In plain English: rents from houses, flats and land fall into the property-income category unless they belong to a commercial business \u2014 and that classification decides which tax return to file.<\/p>\n The taxable base starts with gross receipts. Article 29 of the General Tax Code<\/a> states: \u201cSous r\u00e9serve des dispositions des articles 33 ter et 33 quater , le revenu brut des immeubles ou parties d’immeubles donn\u00e9s en location, est constitu\u00e9 par le montant des recettes brutes per\u00e7ues par le propri\u00e9taire, augment\u00e9 du montant des d\u00e9penses incombant normalement \u00e0 ce dernier et mises par les conventions \u00e0 la charge des locataires.\u201d So you count the rents actually received, plus any landlord expenses passed on to the tenant under the lease, while tenant service charges (charges locatives) that the tenant pays for are ignored. Then Article 28<\/a> gives the subtraction: \u201cLe revenu net foncier est \u00e9gal \u00e0 la diff\u00e9rence entre le montant du revenu brut et le total des charges de la propri\u00e9t\u00e9.\u201d Gross minus deductible charges equals net property income \u2014 the figure that joins your taxable income.<\/p>\n From there, two regimes compete. The first is the micro-foncier<\/em>, a simplified regime for small rental portfolios. Article 32 of the General Tax Code<\/a> provides: \u201clorsque le montant du revenu brut annuel d\u00e9fini aux articles 29 et 30 n’exc\u00e8de pas 15 000 \u20ac, le revenu imposable correspondant est fix\u00e9 \u00e0 une somme \u00e9gale au montant de ce revenu brut diminu\u00e9 d’un abattement de 30 %.\u201d If your annual gross unfurnished rents do not exceed 15,000 euros, the taxable amount is simply 70% of the gross \u2014 a flat 30% allowance (abattement) replaces all actual expenses, and you declare the gross directly on the main return. No annex, no receipts schedule. For a British owner with a single modest flat, this is usually the path of least resistance.<\/p>\n The second is the r\u00e9gime r\u00e9el<\/em>, the actual-expenses regime, under which you deduct each qualifying charge for its real amount. Article 31 of the General Tax Code<\/a> lists them: \u201cLes charges de la propri\u00e9t\u00e9 d\u00e9ductibles pour la d\u00e9termination du revenu net comprennent : 1\u00b0 Pour les propri\u00e9t\u00e9s urbaines : a) Les d\u00e9penses de r\u00e9paration et d’entretien effectivement support\u00e9es par le propri\u00e9taire ; a bis) Les primes d’assurance ;\u201d followed by management fees, co-ownership provisions, loan interest on the property loan, and the taxe fonci\u00e8re<\/em> (the French local property tax paid by owners). Improvement works on dwellings are deductible within limits, while construction, reconstruction or enlargement works are not \u2014 the line between deductible repair and non-deductible construction is the single most litigated point in this field, and invoices must describe the works precisely.<\/p>\n Which should you choose? The arithmetic decides. Below roughly 30% of real charges relative to gross rents, micro-foncier wins on simplicity; above that, the r\u00e9el regime wins on tax. Three practical points matter for British owners. First, the 15,000 euro threshold applies to the whole tax household (foyer fiscal) and all unfurnished rents combined. Second, you may opt for the r\u00e9el regime even below the threshold \u2014 the option binds you for several years, so do not elect it lightly for a year of heavy works unless the following years justify it. Third, an excess of deductible charges over rental receipts creates a d\u00e9ficit foncier<\/em> (property deficit) that can, within statutory caps and conditions, be set against your other income \u2014 a valuable tool the micro regime never offers. Keep every invoice, bank transfer and managing-agent statement for at least the limitation period; in a dispute, the landlord who documents wins, and the landlord who estimates loses.<\/p>\n Brexit changed nothing in these articles, but it changed your file. If you live in France, you declare exactly like a French resident on the same forms (the main 2042 return plus the 2044 annex for the r\u00e9el regime). If you live in the United Kingdom and your only French income is the rent, you remain taxable in France on that rent and file a non-resident return covering French-source income only. Either way, exchange-rate effects are yours alone: convert each rent at its receipt-date rate, keep a consistent method, and never mix HMRC year-end rates into the French return.<\/p>\n The day you put furniture, bedding, crockery and a equipped kitchen at the tenant’s disposal, French tax law moves your income into a different box. Article 35 of the General Tax Code<\/a> expressly classes among industrial and commercial profits (b\u00e9n\u00e9fices industriels et commerciaux, universally shortened to BIC): \u201cPersonnes qui donnent en location directe ou indirecte des locaux d’habitation meubl\u00e9s ;\u201d \u2014 persons who let furnished residential premises directly or indirectly. A furnished flat in Paris, a g\u00eete in Provence, a holiday cottage marketed on a platform: all of these are BIC, not revenus fonciers. The consequences run deep \u2014 different return (the professional 2031 annex or the micro-BIC boxes on the main return), different social-charge rules, registration duties, and the Cotisation Fonci\u00e8re des Entreprises (CFE), the local business tax that catches furnished landlords.<\/p>\n Here too a simplified regime coexists with an actual-expenses regime. Article 50-0 of the General Tax Code<\/a> sets the micro-BIC thresholds, including: \u201c1\u00b0 bis 15 000 \u20ac s’il s’agit d’entreprises dont l’activit\u00e9 principale est de louer directement ou indirectement des meubl\u00e9s de tourisme, au sens du I de l’article L. 324-1-1 du code du tourisme\u201d. A meubl\u00e9 de tourisme<\/em> \u2014 a furnished tourist accommodation, the legal category for most holiday lets \u2014 falls under a 15,000 euro ceiling with a flat allowance, while classic long-term furnished lets and other BIC activities benefit from higher ceilings (83,600 euros for services, 203,100 euros for sales and lodging supply). Above the ceiling, or by option, the r\u00e9gime r\u00e9el BIC<\/em> applies: you deduct real expenses and, crucially, you may depreciate (amortir) the building, the furniture and the works over their useful lives \u2014 something the property-income regime never allows. For a British owner who bought a renovation project, amortisation under the r\u00e9el BIC can transform the tax picture for a decade.<\/p>\n Three traps catch British furnished landlords every year. First, mixing the boxes: declaring furnished rents on the 2044 property annex is simply wrong and guarantees a correction with late-payment interest. Second, ignoring the tourist-furnished formalities \u2014 prior declaration at the town hall (mairie) in many municipalities, registration of the change of use in Paris and other tense zones, the SIRET business number, and since recent reforms the national registration of tourist furnished lets. Fines and back-tax follow the landlord who treats a g\u00eete as an informal arrangement. Third, forgetting that short-term tourist letting in co-ownership buildings or under a lease that forbids it exposes you to civil claims from neighbours and the freeholder alongside the tax risk. Before buying for holiday letting, check the building rules (r\u00e8glement de copropri\u00e9t\u00e9), the municipal authorisation regime, and the planning constraints \u2014 the tax optimisation of a purchase that cannot legally be let is worth nothing.<\/p>\n Choosing between micro-BIC and r\u00e9el BIC follows the same logic as for unfurnished lets, with one addition: simulate amortisation. If the building component alone generates large annual depreciation, the r\u00e9el regime almost always wins despite the accountant’s fee. Many British owners run this computation once at acquisition and never revisit it; revisit it whenever works, a rate change or a reform of the tourist-furnished ceilings alter the inputs.<\/p>\n Income tax is only half the bill. French rental profits also bear the pr\u00e9l\u00e8vements sociaux<\/em>, the social levies (CSG, CRDS and solidarity levy) collected on capital and property income at an aggregate statutory rate \u2014 currently 17.2% \u2014 even for landlords who never use the French health system. The legal anchor is Article L. 136-6 of the Social Security Code (Code de la s\u00e9curit\u00e9 sociale)<\/a>: \u201cLes personnes physiques fiscalement domicili\u00e9es en France au sens de l’article 4 B du code g\u00e9n\u00e9ral des imp\u00f4ts sont assujetties \u00e0 une contribution sur les revenus du patrimoine assise sur le montant net retenu pour l’\u00e9tablissement de l’imp\u00f4t sur le revenu\u201d and the text expressly lists \u201ca) Des revenus fonciers ;\u201d \u2014 property income \u2014 while a parallel paragraph catches BIC rental profits. If you are tax-resident in France, the levy applies to your net rental profit as a matter of course.<\/p>\n The harder question is the British owner who lives in the United Kingdom, works there and pays National Insurance there. European Union law long ago established that a person covered by one Member State’s social security system cannot be made to contribute to another’s \u2014 the unicit\u00e9 de l\u00e9gislation<\/em>, the single-legislation principle. The Court of Cassation restated it twice on the same day in September 2025. In Cass. civ. 2, 25 September 2025, No. 872 FS-B, appeal F 22-24.634 (Mrs S v URSSAF Franche-Comt\u00e9)<\/a>, the Second Civil Chamber held that the coordination regulations \u201cconsacrent le principe d’unicit\u00e9 de la l\u00e9gislation de s\u00e9curit\u00e9 sociale, selon lequel la personne \u00e0 laquelle les r\u00e8glements s’appliquent n’est soumise qu’\u00e0 la l\u00e9gislation d’un seul \u00c9tat membre, en sorte que celle-ci, affili\u00e9e \u00e0 un r\u00e9gime de s\u00e9curit\u00e9 sociale d’un \u00c9tat membre, ne doit pas contribuer au r\u00e9gime de s\u00e9curit\u00e9 sociale d’un autre \u00c9tat membre (CJUE, arr\u00eat du 26 f\u00e9vrier 2015, De Ruyter, C-623-13, point 35).\u201d The sibling decision, Cass. civ. 2, 25 September 2025, No. 873 FS-D, appeal G 22-20.036 (Mr S v URSSAF Franche-Comt\u00e9)<\/a>, repeats the identical holding: the same regulations \u201cconsacrent le principe d’unicit\u00e9 de la l\u00e9gislation de s\u00e9curit\u00e9 sociale, selon lequel la personne \u00e0 laquelle les r\u00e8glements s’appliquent n’est soumise qu’\u00e0 la l\u00e9gislation d’un seul Etat membre, en sorte que celle-ci, affili\u00e9e \u00e0 un r\u00e9gime de s\u00e9curit\u00e9 sociale d’un Etat membre, ne doit pas contribuer au r\u00e9gime de s\u00e9curit\u00e9 sociale d’un autre Etat membre\u201d. Both appeals by the insured were rejected (REJETTE le pourvoi), but the principle restated is the one British landlords rely on.<\/p>\n What does this mean after Brexit? The United Kingdom is no longer a Member State, so the EU coordination regulations do not apply to you automatically as they once did. Your position now depends on proof. If you hold a valid S1 healthcare certificate, remain compulsorily affiliated to the UK system while posted, or fall under the social-security protocol of the EU\u2013UK Trade and Cooperation Agreement for your situation, you may have grounds to contest French social levies on your rental income \u2014 but the burden is on you to produce the certificate and demonstrate that the single-legislation logic covers you. If you are simply a UK resident landlord with no cross-border affiliation certificate, the French administration will treat the levies as due, and a bare reference to \u201cI pay National Insurance\u201d will not move it. Since 2019 the statute itself channels non-residents affiliated elsewhere toward a solidarity levy rather than full CSG\/CRDS in defined cases \u2014 the exact line depends on your year, your certificates and your residence, which is why generic forum advice on this point is dangerous.<\/p>\n When URSSAF or the tax office bills levies you consider undue, act in order and on time. First, file a written claim (r\u00e9clamation) with the body that issued the assessment, attaching your UK affiliation evidence, your S1 if you hold one, your residence proofs and the computation you dispute \u2014 keep proof of sending. Second, if the reply is negative or never comes within the statutory period, take the dispute to the competent court: the judicial courts for social-levy and URSSAF disputes, the administrative courts for income-tax assessments. Third, never let deadlines drift: French tax claims expire on 31 December of the second year following assessment, and social-body appeals run on short fixed periods stated on each notice. A late claim fails whatever its merits. Interest for late payment and surcharges accrue while you wait, so pay under protest where required to stop the clock, then fight on the principal.<\/p>\n France taxes the rent first. That rule comes from the France\u2013United Kingdom double tax treaty signed on 19 June 2008<\/a>, whose Article 6 reserves income from immovable property to the State where the property sits: rents from a French flat or house are taxable in France, full stop, whether the landlord lives in London or Lyon. The United Kingdom, as your residence State if you live there, may also tax the same rents under its worldwide-taxation principle \u2014 but Article 24 of the treaty obliges it to eliminate the resulting double taxation by granting a foreign tax credit for the French tax paid on that income. You declare twice, you pay once in substance, and each State keeps its paperwork.<\/p>\n In practice the circuit runs as follows. On the French side, you file the French return and pay French income tax plus social levies on the net rental profit as described in Part I. On the UK side, you declare the gross French rents on your Self Assessment return using the foreign property pages, convert euros into pounds at a consistent HMRC-accepted rate, deduct the same categories of expenses HMRC allows \u2014 which do not always match the French deductible list \u2014 and then claim Foreign Tax Credit Relief for the French income tax attributable to those rents. Keep the French tax assessment (avis d’imp\u00f4t) as your proof: HMRC routinely asks for it, and the credit cannot exceed the UK tax due on the same income. Where French amortisation under the r\u00e9el BIC created large French deductions with no UK equivalent, the two computations diverge sharply \u2014 that divergence is normal, not an error, provided each return follows its own domestic rules.<\/p>\n Official guidance on both sides confirms the method. The French tax administration’s BOFIP doctrine and the impots.gouv.fr<\/a> non-resident pages describe how French-source rental income is declared and which annex applies; service-public.fr<\/a> summarises the declaration of property income for individuals; and gov.uk’s Foreign Tax Credit Relief guidance<\/a> explains how UK residents relieve French tax on foreign property income. Read the English and French pages together before filing \u2014 each administration describes only its own half of the circuit, and misunderstandings almost always come from assuming one return settles both.<\/p>\n Errors cluster in predictable places. Declaring the rent only in the United Kingdom because \u201cHMRC taxes my worldwide income anyway\u201d leaves the French assessment to arrive with penalties. Declaring only in France leaves HMRC interest running. Claiming the UK credit for French social levies as if they were income tax invites refusal: the credit covers income tax, not social charges, and the treaty relief follows that boundary. And misdating income across the two different tax years \u2014 France taxes calendar-year receipts, the UK taxes 6 April to 5 April \u2014 creates phantom double taxation that is really a timing mismatch; reconcile by receipt date, year by year, and keep a simple spreadsheet mapping each rent to both returns.<\/p>\n If the French office misapplies the treaty \u2014 for example by denying a deduction the statute allows, or by assessing social levies from which your certified affiliation exempts you \u2014 the remedy is the same disciplined path as for any French tax dispute: administrative claim first, with the treaty articles and your certificates attached, then the administrative court (tribunal administratif) on the tax itself. Name the treaty, quote the article, attach the assessment and the UK return showing the same income: judges apply treaties every day, but only when the claimant puts the text and the facts on the table. Where both States claim the same euro of tax despite the credit mechanism, the treaty’s mutual-agreement procedure between the two administrations exists as a last resort \u2014 slow, but designed exactly for genuine double taxation that domestic appeals cannot unwind.<\/p>\n A British landlord succeeds in France by treating the letting as a small French business with French books, even when the owner lives in Britain. Classify the income correctly \u2014 property income for unfurnished lets, commercial profit for furnished ones. Choose the regime by arithmetic, not habit: micro-foncier and micro-BIC reward simplicity below their ceilings, while the actual-expenses regimes reward documented charges, works and amortisation above them. Prove your social-security position with certificates rather than assertions, especially since Brexit removed the automatic EU coordination you once enjoyed. Declare in both countries, pay in France first, and claim the UK foreign tax credit with the French assessment in hand. And when an assessment looks wrong, challenge it in writing, with the statute, the treaty and the evidence attached, inside the deadline printed on the notice. Rents are taxable; over-taxation is appealable \u2014 the difference lies in the file you keep.<\/p>\n Telephone consultation within 48 hours with a lawyer of the firm. Call +33 6 46 60 58 22<\/a> (Ma\u00eetre Reda Kohen) or write via our contact page<\/a>. We advise British owners across Paris and \u00cele-de-France on French rental declarations, social charges and double-tax relief.<\/p>\n","protected":false},"excerpt":{"rendered":" British owner letting a French property after Brexit? How to declare unfurnished or furnished rental income, choose micro-foncier or actual expenses, handle French social charges and use the France-UK double tax treaty \u2014 with remedies.<\/p>\n","protected":false},"author":251031309,"featured_media":16509,"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-2127656","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-british-desk","category-decryptage"],"yoast_head":"\nB. I let my French property furnished \u2014 why is the profit taxed as a business?<\/h3>\n
II. What a British owner really pays on French rents \u2014 and how to challenge it<\/h2>\n
A. Do I pay French social charges when I already pay UK National Insurance?<\/h3>\n
B. Taxed in France and in the United Kingdom \u2014 how does the treaty prevent double taxation?<\/h3>\n
Conclusion<\/h2>\n
Need a quick opinion on your case?<\/h2>\n