You kept the flat in Manchester or the terrace in Bristol when you moved to France, and every month the rent lands in your UK account. Then comes the question that worries almost every British landlord living in France after Brexit: who taxes that rent, do you have to declare it twice, and how do you stop both countries taking a cut on the same pounds? The short answer is reassuring but demanding. The United Kingdom keeps the first right to tax rent from property on its soil, France taxes you again as a French resident on your worldwide income, and the France-United Kingdom double tax treaty of 19 June 2008 then neutralises the overlap through a French tax credit. Nothing about Brexit changed that mechanism, because tax treaties are bilateral agreements that sit outside European Union law. What trips up British residents in practice is never the principle. It is the paperwork: the wrong box on the French return, the missing foreign-income annexe, a letting agent who deducted UK tax that nobody reclaimed correctly, or social charges applied to rent that should have escaped them. This guide walks through the full journey in plain English, with the exact French rules, the treaty articles and the court decisions that protect you, so you can declare correctly, pay only what you owe and challenge anything else.
I. Your UK Rent Stays Taxable in Britain but Must Be Declared in France: How Residence and the Treaty Share Out the Taxing Rights
A. Why Settling in France Makes Your Worldwide Income, Including UK Rents, Declarable to the French Treasury
French tax residence is the starting point, because it decides whether France can look beyond French-source income at all. The rule is set by the Article 4 A of the General Tax Code, known in French as the Code général des impôts, and it provides that “Les personnes qui ont en France leur domicile fiscal sont passibles de l’impôt sur le revenu en raison de l’ensemble de leurs revenus.” In other words, once France regards you as one of its tax residents, you owe French income tax on all of your income, wherever in the world it arises, while a person whose tax home remains outside France is taxable only on French-source income. That worldwide scope is why your Manchester or Bristol rents cannot simply be left off the French return on the ground that they are English income paid into an English bank account.
The criteria that make you a French tax resident are deliberately broad and alternatives, meaning a single one is enough. The Article 4 B of the Code states that “Sont considérées comme ayant leur domicile fiscal en France au sens de l’article 4 A : a. Les personnes qui ont en France leur foyer ou le lieu de leur séjour principal”, before adding professional activity and the centre of economic interests as further independent tests. The foyer means the family home, the place where your household habitually lives, and the lieu du séjour principal means the place of your main physical presence. A British citizen who rents or owns a home in France, whose partner and children live there, and who spends most of the year there will meet the first test without any need to examine the others. Running a business or working in France can independently make you resident, as can centring your economic interests there, but most retired or remote-working British residents are caught by the home-and-presence test alone.
Two misunderstandings need clearing up at this stage. The first is that Brexit changed something here. It did not. The residence tests in the Code predate Brexit by decades and have not been rewritten for British nationals, and the treaty tie-breaker rules that resolve dual-residence conflicts continue to apply exactly as before, because the treaty is a bilateral convention between London and Paris, not a European instrument. The second misunderstanding is that paying UK tax on the rent somehow removes it from the French return. It does not. The French administration states the position plainly on its official tax portal: as a matter of principle, every member of the household tax unit must report income received from abroad. The foyer fiscal, the household tax unit under which couples and dependants are jointly assessed, must report foreign income as a matter of principle. UK tax paid is not an exemption from declaring. It is the raw material for the treaty credit examined below, and the credit can only be computed if the income is declared first.
Dual residence can still arise in the year of the move or where life genuinely straddles the Channel, for example where a spouse remains working in London while the family home is in Lyon. The treaty devotes a specific tie-breaker cascade to individuals claimed by both States, looking in turn at the permanent home, the centre of vital interests, habitual presence and nationality. Litigation before the French courts regularly turns on exactly this cascade, and the Cour de cassation, France’s highest court for civil and tax matters, treats treaty residence as decisive once the facts point one way. In a recent commercial-chamber ruling, the ARRÊT DE LA COUR DE CASSATION, CHAMBRE COMMERCIALE, FINANCIÈRE ET ÉCONOMIQUE, DU 2 AVRIL 2025, pourvoi K 23-14.568, decided 2 April 2025 and published on the Court’s official website at https://www.courdecassation.fr/decision/67eccf1f05aee137f36c34d7, the Court recalled in substance that treaty provisions prevail over domestic tax provisions under Article 55 of the Constitution, so that where the treaty allocates a taxing right or an exemption, the domestic rule must give way. The dispute there concerned wealth tax and a different treaty, but the primacy principle is general: whenever the France-United Kingdom treaty gives the answer on your rental income, that answer beats any conflicting reading of the domestic Code. Keep evidence of your residence position from day one, meaning the lease or title deeds for the French home, school certificates, utility bills, travel records and any Withdrawal Agreement residence permit, known as the carte de séjour accord de retrait du Royaume-Uni, because the administration will ask for documents, not assertions, if it queries your status.
B. What the France-United Kingdom Treaty Says About Rental Income and How the French Tax Credit Wipes Out the Second Bill
The treaty rule on rental income is one of the simplest in the whole convention, and it favours the State where the bricks stand. Article 6, paragraph 1 of the 2008 convention, published in English on the British government’s official treaty page at https://www.gov.uk/government/publications/france-tax-treaties/2008-uk-and-france-double-taxation-convention-in-force, provides that income from immovable property, including agriculture and forestry income, situated in one of the two States may be taxed in that State. Immovable property, a term the treaty defines by reference to the law of the State where the property sits, therefore carries its rental yield with it for taxing purposes: English-situated property may be taxed by the United Kingdom. The next paragraph removes any doubt about lettings specifically, stating that the paragraph 1 rule covers income from the direct use, letting or any other form of use of the property. A standard assured shorthold tenancy, a holiday let, a room in your former main home rented while you live in France: all are lettings within that sentence, and all may be taxed by HMRC, the British tax authority, in the first instance.
The phrase may be taxed matters enormously and is constantly misread. It does not mean the United Kingdom must tax the rent, nor that France must exempt it. It means the United Kingdom is entitled to tax it, and France, as your residence State, remains entitled to include it in your worldwide base while giving relief. The treaty’s relief article, Article 24 on the elimination of double taxation, sets out the French-side mechanism as follows: for France, double taxation is relieved by taking income taxable in the United Kingdom into account in the French computation while granting the French resident a tax credit against French tax, subject to the conditions and limits of the sub-paragraphs and paragraph 4. For rental income of the ordinary kind, the credit then equals, for ordinary rental income of this kind, the amount of French tax attributable to that income, on condition that the French resident is subject to United Kingdom tax on it. Read carefully, that sentence contains the two conditions British landlords most often miss. First, the credit equals the French tax attributable to the rent, not the UK tax actually paid, so where British tax on modest net rents is lower than the corresponding French tax, a residual French charge survives, and where British tax is higher, the excess is not refunded by France. Second, the credit is conditional on the landlord genuinely being subject to United Kingdom tax on that rent, which is why keeping the property inside the UK tax net, through the Non-Resident Landlord scheme or Self Assessment examined in Part II, is not optional paperwork but the legal precondition of French relief.
In French domestic practice this treaty credit travels through a well-marked set of forms. The tax portal’s guidance on foreign income explains that rental income from abroad goes in box 4 of annexe 2047, the foreign-income annexe to the return, with the official table assigning rental income to box 4 for rents, illustrated by the example of rents from a Spanish property to be entered in box 4, a pattern that applies identically to a British property. The amounts are then carried onto the main 2042 return in the boxes for foreign rental income from box 4, as the same official page at https://www.impots.gouv.fr/particulier/questions/comment-seront-imposes-mes-revenus-percus-de-letranger instructs. The credit itself is claimed on the complementary return 2042-C, and the administration summarises the logic plainly: where the same income was already taxed in the country of origin, the tax treaties generally provide a credit that reduces the French tax. For British rents the standard presentation is the gross rent before UK tax on annexe 2047 with the corresponding credit on 2042-C, so that the French calculation first includes the income and then subtracts the treaty credit. Declare the net after UK tax instead of the gross, or omit the 2042-C credit lines, and the computer will either under-tax you and expose you to a reassessment or over-tax you with no credit at all. Either mistake then has to be repaired through the claims procedure described in Part II, which is always slower than getting the boxes right the first time.
One further domestic point belongs here because it shapes the numbers the credit is measured against. French rental income, whether French or foreign in origin once declared, is computed as net foncier, net rental income, and the Code defines it in a single clean sentence: “Le revenu net foncier est égal à la différence entre le montant du revenu brut et le total des charges de la propriété.” That definition sits in Article 28 of the General Tax Code, while Article 14 of the same Code brings rents within the foncier category, stating that “sont compris dans la catégorie des revenus fonciers, lorsqu’ils ne sont pas inclus dans les bénéfices d’une entreprise industrielle, commerciale ou artisanale, d’une exploitation agricole ou d’une profession non commerciale” the revenues of built and unbuilt property. Deductible charges are listed in the companion provisions, and the progressive scale that then applies to residents is the ordinary income-tax scale, introduced for residents by the rule that “En ce qui concerne les contribuables visés à l’article 4 B , il est fait application des règles suivantes pour le calcul de l’impôt sur le revenu”, the opening words of Article 197 of the General Tax Code, which sets the scale applicable to residents. The treaty credit is measured against the French tax computed on that net figure, which is why British landlords should keep the same discipline over deductible charges, insurance, repairs, managing-agent fees and loan interest where allowable, as they would for a French letting. Sloppy expense records do not just inflate the UK bill. They inflate the French base against which the credit is capped.
II. Paying the Right Amount Each Year and Challenging the Bill When It Is Wrong: British Collection Rules, French Social Charges and the Appeals That Protect You
A. How to Handle the British Side and the French Return Year by Year Without Inviting Penalties
Start with the British side, because without proper UK taxation there is no treaty credit in France. The British government’s official guidance for people living abroad, at https://www.gov.uk/tax-uk-income-live-abroad/rent, states the threshold rule plainly: living abroad for six months or more a year makes you a non-resident landlord in the eyes of HMRC, even if you remain UK-resident for tax purposes. A British citizen settled in France will normally meet that six-month test, and the Non-Resident Landlord scheme then offers two collection routes. Either the letting agent or tenant deducts basic-rate tax from the rent and certifies it at year-end, or the landlord applies on form NRL1i for HMRC’s approval to receive the rent in full and pay through Self Assessment. The guidance confirms that if the application is approved, HMRC instructs the agent or tenant to pay the rent gross, and the landlord reports the income in a Self Assessment return, and adds the tenant-deduction mechanics for direct lettings: the agent or tenant deducts basic-rate tax from the rent after expenses paid, and hands over an annual certificate of the tax deducted. Neither route exempts the rent. Both are collection machinery for the same UK charge that Article 6 of the treaty authorises, and both generate the proof of UK taxation, the deduction certificate or the Self Assessment calculation known as the SA302, that the French file will later need.
Two further British points deserve attention because they directly affect the French credit. First, the guidance is explicit that rental income must go on a Self Assessment return unless HMRC says otherwise, so a landlord whose agent already deducted tax cannot simply walk away assuming the matter closed. The return reconciles the position, claims allowable expenses and the Personal Allowance where available, and produces the final UK liability figure. Second, British nationals living abroad generally keep their Personal Allowance, the tax-free slice of income, and the guidance notes the case where rental income sits below the Personal Allowance, alongside the warning that no refund can be claimed by someone with no Personal Allowance eligibility. For a British landlord in France this usually means UK tax on modest rents can be small or even nil after expenses and allowance, which is perfectly lawful but has the French consequence identified earlier: the treaty credit cannot exceed the French tax attributable to the rent, and where no UK tax was effectively borne, the administration may question or refuse the credit. Keep the Self Assessment return, the SA302 calculation and the NRL approval or deduction certificates every year. They are the documentary spine of the French claim.
On the French side, discipline means three habits. First, file annexe 2047 every year the rent arises, even if the UK liability is nil, even if the property stood empty part of the year, and even if the rent barely covers the mortgage. The foreign-income annexe is where the treaty analysis visibly happens, and its absence is the single most common trigger for a French reassessment that adds the rent with no credit. Second, carry the figures to the right boxes on 2042 and 2042-C exactly as the portal directs: gross rent in the foncier boxes, credit on the treaty-credit lines, worldwide income complete. Third, align the two tax years. The United Kingdom taxes rental profits to 5 April while France taxes calendar-year income, so the French return for year N will draw on a UK year straddling two British tax years. Convert sterling with a consistent, defensible rate, normally the annual average published by the French administration or the Bank of France rate at receipt, keep the conversion schedule, and never mix methods mid-stream. Where the UK assessment for the overlapping period is not yet final when the French deadline falls in May or June, declare on the best available figures from tenancy statements and agent summaries, then correct through a réclamation rectificative, a corrective claim, once the SA302 is final. An honest provisional figure corrected promptly is treated very differently from silence followed by discovery.
A short word on furnished lettings and property structures, because British owners often hold through them. A furnished letting in Britain remains UK rental income under Article 6 for treaty purposes, but its French classification and the micro-regimes for furnished accommodation belong to French domestic law and turn on the precise facts, registration and thresholds. A property held through a British company or a French société civile immobilière, a non-trading property company, raises its own overlay of corporate, transparency and treaty-characterisation questions. Neither situation fits a general guide, and both reward early advice before the return is filed rather than a dispute afterwards. The default case this guide covers, direct individual ownership of a UK residential letting, is already complex enough to deserve the full routine above.
B. How to Challenge Double Taxation, Wrong Social Charges and Incorrect Assessments Through the French Remedies That Actually Work
When the assessment notice, the avis d’imposition, arrives and the numbers look wrong, French law offers a structured ladder of remedies, and the first rung is the réclamation contentieuse, the formal contentious claim to the tax authority. Standing is deliberately generous. Article L190 of the Tax Procedures Book provides that “Les réclamations relatives aux impôts, contributions, droits, taxes, redevances, soultes et pénalités de toute nature, établis ou recouvrés par les agents de l’administration, relèvent de la juridiction contentieuse lorsqu’elles tendent à obtenir soit la réparation d’erreurs commises dans l’assiette ou le calcul des impositions, soit le bénéfice d’un droit résultant d’une disposition législative ou réglementaire.” A treaty credit is precisely a right resulting from a legislative and regulatory provision, since treaties rank above statutes, so a refused or omitted Article 24 credit is a textbook case for this procedure. The claim goes to the tax office that issued the assessment, identifies the tax, year and article of the notice, states the treaty basis with the article numbers, quantifies the credit and attaches the proof: the 2047 and 2042-C copies, the tenancy agreement, the agent’s deduction certificate or SA302, the sterling conversion schedule and the UK tax computation. File within the deadline printed on the notice, keep proof of filing, and pursue the administration for its formal rejection decision, because that decision opens the door to the administrative court, the tribunal administratif, if the claim fails.
The most frequent British-landlord disputes fall into four patterns, each with its own evidential answer. The first is the missing or capped credit: the administration includes the rent but grants no credit or a credit smaller than expected. The answer is usually in the file, meaning UK tax not evidenced, gross-versus-net confusion, or the credit capped at the French tax attributable to the rent exactly as the treaty provides. Recompute the cap from the French assessment, prove the UK tax borne with the SA302 and certificates, and claim the correct capped figure rather than the full UK tax where the treaty so limits it. The second pattern is the phantom residence challenge, where the administration suggests the landlord is not French-resident at all and seeks a different regime, or conversely a British landlord who believed himself non-resident discovers France claims him. Here the Article 4B criteria and the treaty’s tie-breaker do the work, with the documentary bundle described in Part I. The third pattern is penalties for omitted foreign income or an omitted 2047, where the administration addslate-payment and accuracy surcharges. Prompt spontaneous correction before any audit notice, the établissement stable landscape aside, normally softens the outcome considerably compared with discovery during an audit, and the claim should exhibit the corrected annexe with a candid explanation. The fourth pattern is social charges wrongly applied, which deserves its own paragraph because Brexit changed the background even though it did not change the treaty.
French social charges on rental income, principally the contribution sociale généralisée and the contribution pour le remboursement de la dette sociale, universally known by their initials CSG and CRDS, are governed for wealth income by the Social Security Code. Article L136-6 of the Social Security Code opens with the scope rule that “Les personnes physiques fiscalement domiciliées en France au sens de l’article 4 B du code général des impôts sont assujetties à une contribution sur les revenus du patrimoine assise sur le montant net retenu pour l’établissement de l’impôt sur le revenu”, continuing with the list that expressly includes “a) Des revenus fonciers”. A French-resident British landlord is therefore in principle within the charge on the net rent. The European case law that once removed these charges for persons insured in another Member State, associated with the Court of Justice’s de Ruyter judgment of 26 February 2015, case C-623/13, available on the Court’s official database at https://curia.europa.eu/juris/liste.jsf?num=C-623/13, rested on the single-legislation principle of the European coordination regulations, which no longer covers a British national insured in the United Kingdom after Brexit. Where the landlord is insured in France, or insured in the United Kingdom as a third-country national outside the coordination scope, the French charges will normally stand, subject to the personal scope of any Franco-British social-security coordination and the individual’s actual affiliation. Conversely, the French courts continue to police the boundary actively: in the ARRÊT DE LA COUR DE CASSATION, DEUXIÈME CHAMBRE CIVILE, DU 25 SEPTEMBRE 2025, pourvoi F 22-24.634, published officially at https://www.courdecassation.fr/decision/68d4d7901e8f43fdd30b5e0b, the Second Civil Chamber rejected a claim for repayment of French health-related levies by a person working in Switzerland but domiciled in France, confirming that domicile plus the statutory scheme can sustain the charge even in cross-border settings. The lesson for British landlords is practical rather than discouraging: do not assume the charges fall away, quantify them, check the individual’s social-security affiliation for the year, and challenge only with the affiliation evidence that the case law actually rewards, such as a valid S1 healthcare certificate, a certificate of applicable legislation or proof of exclusive affiliation elsewhere recognised by France.
Beyond the domestic claim lies the treaty’s own safety valve, the mutual agreement procedure. Article 26 of the 2008 convention allows a resident who considers that the actions of one or both States tax him contrary to the treaty to present his case to his residence State’s competent authority, irrespective of domestic remedies, with the case to be presented within three years of the first notification of the treaty-incompatible taxation, or within six years of the end of the relevant tax year or chargeable period. For a British resident of France facing genuine double taxation that the French claim and the UK return cannot jointly resolve, for example a characterisation conflict where each State insists the other should give relief, this procedure asks the two administrations to agree the treaty-compliant outcome. It is slower than a domestic claim and should generally run alongside, not instead of, the French réclamation, because domestic deadlines do not wait for diplomacy. But where both States have a plausible reading and the taxpayer is caught between them, it is the only forum whose job is precisely to reconcile them, and the file prepared for the domestic claim, treaty articles, computations, certificates, converts directly into the mutual-agreement memorial.
A final practical checklist keeps all of this usable. Keep a single annual folder per property with the tenancy agreement, rent statements, agent certificates, the Self Assessment return and SA302, the sterling conversion schedule, the French 2047, 2042 and 2042-C copies and the assessment notice. Diary the French filing deadline and the claim deadline on each notice. Never ignore a French mise en demeure, a formal demand, or a proposition de rectification, a proposed reassessment, because silence converts a winnable computation dispute into penalties and enforced recovery by the comptable public, the public accountant. And where the figures are large, the structure involves a company, or the administration questions residence itself, take advice before answering rather than after, because the first letter often frames the entire dispute. The Service public portal’s English-language guidance on the tax position of persons arriving in or living in France, at https://www.service-public.gouv.fr/particuliers/vosdroits/F31442?lang=en, and its companion page on the taxes payable by foreigners in France, at https://www.service-public.gouv.fr/particuliers/vosdroits/F36401?lang=en, give useful orientation, but they do not replace the treaty computation on your own figures.
Conclusion
A British resident of France who lets out a British property lives under two tax systems by design, not by accident. The United Kingdom taxes the rent because the property stands on its soil, under the treaty rule that income from immovable property situated in a State may be taxed there, including income from letting. France taxes the same rent because its residents pay tax on worldwide income, under the domestic rule that persons with their tax home in France are taxable on all of their income. The treaty then joins the two halves: France includes the rent and grants a credit equal to the French tax attributable to it, provided United Kingdom tax was genuinely borne, while the official forms, annexe 2047 with its box 4 for rents, the main return boxes for foreign rental income and the complementary credit lines, give that relief its visible shape. Get the British collection route right through the Non-Resident Landlord scheme or Self Assessment, declare the gross rent with its credit every French year, convert currency consistently and keep the certificates, and double taxation in the true sense should not survive. Where it does, whether through a refused credit, misapplied social charges or a contested residence finding, the formal claim under the Tax Procedures Book, backed where needed by the treaty’s mutual agreement procedure, gives a clear path to correction. The system rewards the organised landlord and punishes the silent one, so organise the file, meet the deadlines and make the treaty work for you.
Need a quick opinion on your case?
Every rental portfolio is different, and a short review of your returns, your UK certificates and your latest French assessment notice is often enough to confirm the credit or spot the error. Our firm offers a telephone consultation within 48 hours with a lawyer of the firm for British residents with French tax questions. Call +33 6 46 60 58 22 or reach us through our contact page, and bring your tenancy schedule and your most recent notices to the call.