You live in France. Your old flat in Leeds, Manchester or Bristol is still let to tenants, the rent lands in your UK account every month, and then two tax offices write to you about the same money. HM Revenue and Customs (HMRC), the British tax authority, treats you as a landlord with UK-source rent and wants a Self Assessment return, the annual British tax return. The French Direction générale des Finances publiques (DGFiP), the French tax administration, treats you as a French resident taxable on worldwide income and wants the same rent on your French return. Many British owners in this position either pay twice, or declare in only one country and receive a frightening avis d’imposition, the French tax bill, or a penalty notice from HMRC two years later. This guide explains the correct route after Brexit: why both countries claim the rent, why the United Kingdom taxes first, how France taxes the same rent again and then cancels the double charge through a treaty credit, and how to challenge the bill when the credit is missing or miscalculated. Readers settling their first French return will find the general mechanics in our hub guide to your first French tax return with forms 2042, 2047 and 3916 and the treaty tie-breaker, and readers living off pensions alongside rents should read our analysis of the 25 percent lump sum France still taxes and the Crown pensions France cannot tax.

I. How do I know where my UK rental income is taxed when I live in France?

A. Am I French tax resident, and does the France-United Kingdom treaty leave my UK rent taxable in Britain?

The starting point is your domicile fiscal, your tax residence for French purposes. French domestic law casts the net wide. Article 4 A of the General Tax Code states: “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 plain English, once France regards you as tax resident, it taxes the whole of your income, including rents from a house outside France. Article 4 B of the same Code opens with: “Sont considérées comme ayant leur domicile fiscal en France au sens de l’article 4 A :” It then lists three alternative tests: your foyer, your home or principal place of stay, is in France; you carry on a professional activity in France unless it is merely ancillary; or the centre of your economic interests is in France. Meeting any one of the three is enough. The same article adds the treaty safety valve: “Les personnes qui satisfont à l’un au moins des critères fixés aux a à c du présent 1 ne peuvent toutefois pas être considérées comme ayant leur domicile fiscal en France lorsque, par application des conventions internationales relatives aux doubles impositions, elles ne sont pas regardées comme résidentes de France.” A person who meets a domestic test can still be treated as non-resident of France if the tax treaty assigns residence to the other State. In practice, a British citizen who moved the family home to France, whose children attend school in France and whose daily life is organised from France, is French tax resident under the first test, and the treaty tie-breaker in Article 4 of the France-United Kingdom Convention of 19 June 2008, which looks successively at permanent home, centre of vital interests, habitual abode and nationality, will normally confirm France. That confirmation matters because it decides which country eliminates the double charge and how.

French residence does not remove the United Kingdom’s right to tax rent from British land. Immovable property is the classic exception to residence taxation: the State where the building stands taxes first. The French tax administration’s published doctrine on the Convention, BOI-INT-CVB-GBR-10-20 on immovable income under the France-United Kingdom treaty, explains that the treaty’s Article 6 covers this rent and that the source State enjoys the prior right to tax, even without a local permanent establishment The State of the source, here the United Kingdom, has the prior right to tax. It exercises that right even where the property does not belong to a local permanent establishment. So the answer to the common question whether HMRC can still require British tax although the owner now lives in Lyon is yes. The United Kingdom taxes the Leeds rent under its own rules, France includes the same rent in your French taxable income as worldwide income, and the treaty then obliges France, as the residence State, to relieve the duplication through a credit. The mirror rule in French domestic law confirms the symmetry: Article 164 B of the General Tax Code lists as French-source income the revenue from buildings situated in France, which is why a non-resident Briton with a Dordogne letting is taxed in France first on that French rent, while you, as a French resident with a Leeds letting, are taxed in Britain first on that British rent. Neither Brexit nor the end of European Union membership changed this allocation; the Convention is bilateral and continues to apply.

Two practical consequences follow. First, keep both residencies straight in your paperwork. If HMRC still treats you as United Kingdom resident under the Statutory Residence Test, the British test based on days, ties and leaver rules, while France also treats you as resident, you are dual resident and the treaty’s Article 4 tie-breaker must be applied before any return is filed, because the credit mechanism assumes one residence State. Second, do not confuse this rental analysis with furnished holiday lettings taxed as business profits or with gains on sale, which follow different treaty articles and different French schedules. This article covers long-term unfurnished residential lettings, the revenus fonciers, property income, from ordinary buy-to-let houses and flats. Readers with a French furnished letting taxed under industrial and commercial profits should not transpose the forms below without advice, though the treaty credit logic is related.

B. How much United Kingdom tax will be taken from my rent, and which HMRC forms authorise the work?

On the British side, the question clients actually ask is concrete: whether the monthly deduction can be replaced by gross payment with an annual settlement, and which form authorises it The official starting point is GOV.UK guidance on tax on rental income for landlords living abroad. It states: a person living abroad for six months or more a year counts as a non-resident landlord in the eyes of HMRC. That status applies even if you remain United Kingdom resident for some purposes; six months abroad is enough to enter the Non-Resident Landlord Scheme, the NRL scheme, the British collection system for rents paid to landlords outside the country. Under that scheme, the default is deduction at source: your letting agent or, where there is no agent and the weekly rent exceeds 100 pounds, your tenant must withhold basic-rate tax from the rent after expenses and issue a year-end certificate. The agent gives you a certificate at the end of the British tax year showing the tax withheld. The alternative is gross payment with annual settlement: you ask HMRC for permission to receive the rent in full and you pay through Self Assessment. The guidance explains that to do so you should permission for gross payment is requested from HMRC on form NRL1i, and that where HMRC grants the request, it instructs the agent or tenant to pay the rent gross, and the landlord settles the liability through Self Assessment Approval is refused where your British tax affairs are not current, for example late returns or unpaid tax. Approval is not an exemption; it is a timing permission. Whether tax is deducted monthly or paid annually, you must still declare: rental income must still be reported on a Self Assessment return unless HMRC directs otherwise Postal filing, commercial software or an accountant must be used because non-resident landlords cannot use HMRC’s standard online service, and the return must include the residence section (form SA109) and the property section (form SA105). The paper deadline of 31 October is earlier than the online-equivalent deadline, and missing it attracts a fine.

Two refinements regularly surprise British owners in France. First, the Personal Allowance, the British amount sheltered from tax, may still shelter modest rents. If the rent after deductible expenses sits below your available allowance, and your agent has already withheld tax, you can reclaim the overpayment by filing form R43, the claim to personal allowances and repayment by a non-resident individual. Eligibility is not automatic for every non-resident; British and certain other nationals retain it, others do not, so the claim must be checked against the Personal Allowance pages rather than assumed. Second, the British computation of the profit follows British rules, not French ones: allowable letting expenses, finance-cost restrictions, wear-and-tear treatment and loss relief are determined under United Kingdom law, and the resulting British tax bill is the input for the French credit, not a figure France recalculates. Keep every British computation, every NRL certificate, every SA105 and every proof of payment. The French inspector who processes your treaty credit will ask for the British assessment, and the administrative judge who hears your challenge if the credit is refused will expect the same bundle. Where a management company or partnership sits between you and the property, the treaty’s look-through language for income from participations giving enjoyment of immovable property can complicate the analysis, and the BOI passage on shares and rights giving use of situated property should be reviewed before filing.

A short Paris and Ile-de-France note helps many readers. A British family settled in Paris, Boulogne-Billancourt or Saint-Germain-en-Laye with a retained buy-to-let in Birmingham files exactly like a family in the Dordogne: the French return goes to the Service des impôts des particuliers (SIP), the local personal tax office, of the French home, now increasingly through the online espace particulier on impots.gouv.fr, while the British return goes to HMRC under the Non-Resident Landlord Scheme. The Paris specificity is practical rather than legal: Paris SIP offices handle large numbers of treaty-credit claims, appointment slots in spring are scarce, and English-language correspondence from HMRC must be translated or at least explained when the inspector asks why the British profit differs from the French net. Build that explanation into the French return from the start with a one-page reconciliation note rather than waiting for an demande d’éclaircissements, a request for clarification.

II. How do I declare my United Kingdom rent in France and stop paying tax twice?

A. How do I report my British buy-to-let on the French return, and is the micro-foncier or the régime réel right for me?

On the French side, the question is equally concrete: which schedules apply, whether gross or net is reported, and how the social levies fit on top French law treats the Leeds rent as revenus fonciers. Article 14 of the General Tax Code provides that there are “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 from built and unbuilt property. An ordinary unfurnished letting falls squarely in this category, even where the building stands abroad. The gross is defined by Article 29 of the same Code: “le revenu brut des immeubles ou parties d’immeubles donnés en location, est constitué par le montant des recettes brutes perçues par le propriétaire”. Gross means cash actually received, plus any tenant-borne expenditure the lease pushes back to you, plus subsidies financing deductible charges, and it includes accessory receipts such as wayleaves where they derive from ownership. The net then subtracts the closed list in Article 31 of the same Code, which opens: “Les charges de la propriété déductibles pour la détermination du revenu net comprennent :” For urban property that list covers genuine repair and maintenance, insurance premiums, unrecovered tenant charges at departure, co-ownership provisions within statutory limits, improvement expenditure on dwellings excluding construction, reconstruction and enlargement, as well as management, guard and caretaking costs, certain taxes and interest on loans taken to acquire, preserve or repair the property. British mortgage interest on the buy-to-let therefore reduces the French net exactly as it reduces the British profit, provided the loan trace is clean; a remortgage whose extra drawings funded a car or school fees will be challenged.

Two regimes then compute the French net, the micro-foncier, the simplified flat-allowance regime, and the régime réel, the actual-expenses regime. Article 32 of the General Tax Code frames the first: “lorsque le montant du revenu brut annuel défini aux articles 29 et 30 n’excède pas 15 000 €, le revenu imposable correspondant est fixé à une somme égale au montant de ce revenu brut diminué d’un abattement de 30 %.” Where annual gross from unfurnished lettings, including the proportional share from certain property funds and companies, stays at or below 15,000 euros, the taxable amount is gross minus a 30 percent allowance, with no other deduction. The regime is simple but blind: with a Leeds terrace yielding 9,000 pounds gross and 4,500 pounds of repairs, insurance, agent fees and interest, the 30 percent allowance leaves 70 percent taxable while the actual-expenses regime would leave roughly half taxable. Conversely, with the same rent and almost no costs in a good year, the allowance is generous. The election is normally exercised by filing method, subject to triennial commitment effects, so model both routes over three years rather than chasing one year’s saving. Where gross exceeds the ceiling, or where you elect out, the régime réel applies: report gross on the property schedule (form 2044, the déclaration des revenus fonciers, the property-income schedule), deduct each charge with invoices and bank proof, carry the net to the main return (form 2042, the déclaration d’ensemble des revenus, the main income return), and detail the foreign origin on the foreign-income schedule (form 2047, the déclaration des revenus encaissés à l’étranger, the foreign-receipts schedule). Currency conversion uses the annual average or the spot rate consistently applied; mixing rates between gross and charges is a classic trigger for adjustment. Keep the British SA105, the NRL certificates and the French 2047 consistent to the pound: three different rental figures across three forms invite a single conclusion, concealment.

The resulting net joins your other income and is taxed at the progressive scale. Article 197 of the General Tax Code sets the familiar bands for taxpayers covered by Article 4 B, currently from 11 percent above 11,600 euros through 30, 41 and 45 percent thresholds. The British rent therefore pushes your French marginal rate exactly like French wages or a French rent would. Do not transpose the non-resident minimum rates to your case: Article 197 A of the same Code, which imposes minimum 20 and 30 percent rates on French-source income of persons without French domicile, with a compensating taux moyen, average-rate, claim for European Union residents, does not govern you once you are French resident. You are taxed under Article 197 on worldwide income, with the treaty credit described below as the relief. Finally, budget for the prélèvements sociaux, the French social levies on capital and property income. Article L. 136-6 of the Social Security Code provides: “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” The same article lists “Des revenus fonciers” among the base. In ordinary cases the Leeds net therefore bears income tax plus the combined social levies, currently 17.2 percent, subject to any affiliation nuance where European coordination rules or a posting certificate place you in another State’s social system. Post-Brexit that nuance is narrower than many forums suggest: a person working and affiliated in France pays the French levies on the worldwide property net, while a person still compulsorily affiliated in the United Kingdom under a valid certificate may resist them, with proof of affiliation. Do not simply omit the levies; claim the exemption expressly with the certificate attached, or expect a reassessment.

B. How does the treaty credit wipe out the British tax, and how do I challenge a refusal or a wrong calculation?

The relief that prevents double payment is a French credit equal to the French tax on the British rent, capped at the British tax actually paid. Under Article 24 of the 2008 Convention, France, as residence State, allows against its tax on income taxable in the United Kingdom a credit equal to the French tax attributable to that income. In the administration’s practice this means: compute French income tax on worldwide income including the Leeds net, isolate the fraction of French tax corresponding to that net, compare it with the British tax proved by assessment and payment receipts, and grant the lower of the two. Where the British effective rate exceeds the French rate on that slice, residual British tax remains unrelieved in France; a claim in the United Kingdom is then the only route. Where the French rate exceeds the British rate, the credit wipes out the French tax on that slice but no refund of the difference is paid. The credit is not an exemption with progression in the technical sense; it leaves the rent inside worldwide income for rate purposes and then subtracts the attributable tax. That distinction matters for the revenu fiscal de référence, the reference tax income used for thresholds and contributions, which continues to reflect the gross mechanics described by the courts.

The courts police the computation strictly, which is why taxpayers win challenges on method even when they lose on principle. In Conseil d’Etat, 9th-10th chambers combined, 10 July 2019, No. 412624, a French-resident lawyer taxed in France on partnership shares including foreign-source business income disputed how the administration had computed the foreign income taken into account for the treaty credit. The Council reviewed the multiplier and the base and concluded, “pour déterminer le crédit d’impôt auquel ces revenus ouvraient droit conformément aux conventions fiscales bilatérales applicables, la cour n’a pas commis d’erreur de droit.” The lesson for a landlord is direct: the credit follows the French measure of the income, with French adjustments applied consistently to numerator and denominator, and any mismatch between the British profit and the French net must be explained rather than assumed away. In Conseil d’Etat, advisory and contentious review of 12 February 2020, No. 435907, the question referred from Cergy-Pontoise tested the treaty’s most sensitive sentence, namely the phrase beginning with les termes ” nonobstant toute autre disposition de la présente Convention ” employés au a) du 3 de l’article 24, asking whether France could withhold the credit from French social contributions where no equivalent income tax exists in the United Kingdom, and, failing that, what objective the credit formula pursues in preserving progressivity while taxing French-taxable income as if other income were also taxable. The Council’s treatment confirms that Article 24 must be read as a whole: the credit preserves the progressive scale and applies under ordinary law conditions, which is why the French return must show the full worldwide income even where the credit later neutralises part of the tax. A return that omits the Leeds rent on the ground that HMRC has already taxed it forfeits the credit mechanism and looks like non-disclosure; a return that declares fully and claims the credit precisely invites correction, not penalty, if the figure is wrong.

The challenge sequence, the recours, the remedy, is the same as for any French income-tax dispute, with two treaty-specific additions. First, correct early. A material error discovered after filing is fixed by a corrective return through the espace particulier or by a written réclamation contentieuse, the formal tax claim, to the SIP that issued the assessment, attaching the British assessment, proof of payment, the NRL certificates, the SA105, the 2047 and the credit computation. Second, calendar the claim. The standard deadline runs to 31 December of the second year following the assessment year, but treaty cases often span two British and French tax years, so diary both the French assessment date and the British payment date and file protectively once the French avis arrives rather than waiting for HMRC’s final reconciliation. Third, escalate in order: hierarchical appeal to the SIP supervisor (recours hiérarchique), departmental mediator where appropriate, then the tribunal administratif, the administrative court, of your French home, with appeal to the cour administrative d’appel, the administrative court of appeal. Before the judge, the winning file proves three things in this order: French residence and worldwide inclusion under Articles 4 A and 4 B; prior British taxation of the same income under Article 6 as confirmed by the BOI; and the arithmetical credit capped at French attributable tax under Article 24. Add the social-levy affiliation proof where levies are disputed. Most refused credits fail on the second or third limb: no British assessment produced, British tax merely withheld but not yet finally assessed, or credit claimed for the full British payment where the French attributable tax is lower. Frame the claim as a calculation correction with exhibits, not as a complaint about paying in two countries, and the inspector can concede without losing face. Where the administration maintains an imposition primitive, the original assessment, that double counts the rent or denies any credit at all, the court has the method cases above to apply, and interest on arrears falls with the principal once the credit is restored.

Conclusion

Living in France while keeping a British buy-to-let means accepting two honest tax claims and one treaty promise. The United Kingdom taxes the rent first because the building stands there, through the Non-Resident Landlord Scheme and Self Assessment, with gross-payment permission available on form NRL1i and final reporting on forms SA109 and SA105. France taxes the same net again because you are French tax resident, through the revenus fonciers schedules, micro-foncier within 15,000 euros gross with its 30 percent allowance or actual-expenses accounting above or by election, at the Article 197 progressive scale plus social levies under Article L. 136-6. The France-United Kingdom Convention then requires France to credit the French tax attributable to the British rent against your French bill, leaving any excess British tax where it lies. Declare the full rent on forms 2047, 2044 and 2042, reconcile the British profit and the French net to the pound, attach the British assessment and payment proof, compute the credit as the lower of British tax paid and French tax attributable, and challenge quickly with exhibits when the credit is missing or short. Handled that way, the Leeds flat funds your French life instead of funding two treasuries.