Moving to France after Brexit does not make a UK rental property disappear from your French tax file. A British owner who becomes tax resident in France may have to report the rent in both countries, but reporting is not the same as paying the same tax twice. The result depends on the property’s location, the owner’s tax residence, the type of letting, the deductible expenses, the France–UK double-tax treaty and the method used to remove double taxation. The practical mistake is to start with a form or a currency conversion before deciding which country has the taxing right and whether the owner is genuinely resident in France under domestic law and the treaty.

This guide addresses an individual who lives in France and receives rent from property in the United Kingdom. It does not cover the purchase of a property, the creation of a company or an SCI (société civile immobilière, a French civil property-holding company), or the tax treatment of a furnished holiday-letting business as a full business activity. Those situations need a separate analysis. The aim here is operational: identify the legal residence, classify the rent, calculate a defensible net figure, complete the French and UK returns, and preserve a route to correction if one authority taxes the same income without applying the treaty.

I. What happens to UK rental income when a British citizen becomes tax resident in France?

A. How do you know whether France is your tax residence after Brexit?

British nationality does not decide French tax residence. The first question is where your domicile fiscal, meaning your tax domicile, is located for the year concerned. Under Article 4 B of the French General Tax Code, the domestic tests include the home or principal stay, the main professional activity and the centre of economic interests. The text refers to persons who have in France “leur foyer ou le lieu de leur séjour principal”. In English, that is the household or principal place of stay. These are alternative tests: a person can meet one of them without meeting all of them.

For a British landlord, the evidence is usually more useful than a single day count. Keep the date on which you moved, the address where your household actually lived, utility bills, a French tenancy or ownership document, school or health registrations where relevant, employment records, bank activity and the location of the decisions that generated your income. A French residence permit is important for immigration purposes, but it is not by itself a complete answer to the tax-residence question. Conversely, continuing to own a UK home or keeping a UK bank account does not automatically preserve UK tax residence.

The domestic rule is then tested against the treaty. The France–UK convention published by Décret n° 2010-20 of 7 January 2010 defines treaty residence separately from nationality, immigration status and the address shown on a bank statement. A person can appear resident under both domestic systems. In that situation, the treaty’s residence rules and the facts of the person’s permanent home, personal and economic relations and habitual abode must be reviewed together. There is no safe universal answer based only on the phrase “I spend 183 days in France”. Day counts can be decisive in some factual patterns, but the residence analysis is not a slogan.

Residence must also be fixed for the correct period. France works with a calendar-year income-tax return, while the UK tax year normally runs from 6 April to 5 April. A move during the year can create a split-year problem in the UK and a French return that covers only the period in which the French tax rules apply. The official UK guidance on UK residence while living abroad confirms that someone can live abroad and still be UK resident for tax purposes. That is why the return should record the move date, not simply tick “France” because the taxpayer has lived there for several months.

Do not confuse residence with source. A French resident can have UK-source rental income. A UK tax resident can have French-source income. Residence usually determines the scope of the country-of-residence return; source and the treaty then determine where a particular category of income may be taxed. If the residence conclusion is uncertain, write down the competing positions and obtain a residence certificate or other official evidence before claiming treaty relief. The certificate does not replace the analysis, but it can prevent a form being rejected because the claim is unsupported.

The French return is generally a worldwide-income return for a French tax resident, subject to treaty relief and specific exemptions. Article 170 of the French General Tax Code requires an income declaration from a person liable to income tax and also deals with income received from abroad. Its wording states that “toute personne imposable audit impôt est tenue de souscrire” a detailed declaration. The practical translation is simple: an overseas payment is not omitted merely because it arrived in sterling, remained in a UK account or was taxed at source.

A useful first-year file therefore has three separate headings: residence, source and reporting method. Under residence, record where you lived and why. Under source, identify the property and the legal owner. Under reporting method, record whether the UK rent is taxable in France, taxable only in the UK with a French credit or taken into account under an exemption-with-progression method. Keeping these questions separate makes it much harder to copy the treatment of a UK pension, dividend or salary onto rental income, which is governed by a different treaty article.

B. Can the UK still tax rent from a UK property when you live in France?

Yes. The location of the land remains central. Article 6 of the France–UK convention provides that income from immovable property situated in a contracting state may be taxed in that state. The official text says: “Les revenus provenant de biens immobiliers … situés dans un Etat contractant sont imposables dans cet Etat.” The same article expressly covers direct exploitation, letting and leasing. In practical terms, rent from a house or flat in the UK remains within the UK taxing framework even when the landlord has moved to France.

HM Revenue & Customs (HMRC, the UK tax authority) explains the UK side in its official guidance on rental income when you live abroad. A landlord who lives abroad for at least six months of the year may fall within the non-resident landlord scheme. The letting agent or tenant may have to deduct basic-rate tax unless HMRC has approved an application to receive rent gross. Approval is not automatic: the landlord must keep UK returns and payments up to date. The deduction is a UK collection mechanism, not proof that the final UK liability has been calculated correctly.

If the property is let unfurnished, the French classification will normally be the category known as revenus fonciers, meaning rental income from property held outside a commercial business. Article 14 of the French General Tax Code places income from built and unbuilt property in that category when it is not included in industrial, commercial, agricultural or non-commercial business profits. The article begins the definition with “Les revenus des propriétés bâties”. It is the character of the activity that matters, not the fact that the rent is paid in pounds.

Furnished letting can move into a different category. A furnished property may generate bénéfices industriels et commerciaux, usually shortened to BIC, meaning industrial and commercial profits, rather than revenus fonciers. Frequent short-term letting, services supplied to guests, a professional activity, a company, a trust or a partnership may alter the analysis again. Do not use the unfurnished-property boxes simply because the asset is a flat. First identify the lease, the services, the person receiving the rent and the legal owner. The French return should follow that classification; the UK return may use a different category and still require the same underlying evidence.

For an individual who is French resident, the treaty normally does not remove the need to report the UK rent in France. It changes the way the French tax is calculated or credited. The treaty’s Article 24 is headed “Elimination des doubles impositions” and sets out the method applicable in France. It provides, in particular, for income that is taxable or taxable only in the United Kingdom to be taken into account for French tax purposes, with a credit subject to the treaty conditions and limits. The credit is not a licence to subtract every pound of UK tax from every euro of French tax. It is a treaty calculation tied to the relevant income and the French tax attributable to it.

The 2026 French notice for form 2047 confirms that the United Kingdom belongs to the group of treaty countries for which the credit may equal the French tax on the relevant foreign income. Its method is sometimes described as a credit equal to French tax. In that model France calculates tax on the foreign income, then neutralises the corresponding French tax by the treaty credit, while the foreign income can still affect the rate applied to other French-taxable income. This is why a return can show UK rent and still produce no additional French income tax on that rent, yet produce a different marginal rate on salary, pension or other French income.

That outcome is different from saying that France does not care about the UK rent. It can affect the tax household’s rate, the reference income used in other calculations and, depending on the taxpayer’s circumstances, social levies or other obligations. The French tax authority’s guidance on foreign-source income expressly advises taxpayers to start with the relevant treaty and distinguishes between a tax credit and exemption with effective-rate treatment. A return that omits the rent because “the UK has first taxing rights” can therefore be incomplete even when the treaty prevents a second full charge.

There is also a boundary between rental income and a later disposal. Rent is governed by the immovable-property article. A sale can engage the capital-gains article, domestic French rules, UK non-resident capital-gains reporting and different forms. Do not place a sale price or a capital gain in the rental-income calculation. The same warning applies to a refinancing drawdown, a deposit returned to a tenant, a capital contribution, an insurance payment or a company distribution. The bank statement is not a tax classification.

Finally, an owner who is not French resident is not automatically outside France’s tax system. Article 164 B of the French General Tax Code identifies French-source income, including income from immovable property situated in France, for people without a French tax domicile. Article 197 A contains rules for French-source income of non-residents. These provisions concern a different direction of travel: they are relevant if the British owner also receives rent from France. They show why each property must be mapped to its country of source instead of treating “foreign property” as one undifferentiated category.

II. How do you declare UK rental income in France and claim treaty relief?

A. Which forms, figures and evidence should you prepare?

Start with a property schedule before opening the online French return. For each UK property, record the address, ownership percentage, type of letting, lease dates, gross rent, agency fees, insurance, repairs, interest, local charges, periods of vacancy and any tax withheld in the UK. Keep a separate column for amounts actually received and amounts merely invoiced. Convert the figures into euros using a consistent, documented method. The current French 2047 notice states that foreign-currency income is declared at its euro equivalent based on the Paris exchange rate on the day of receipt. Preserve the rate, date and source with the schedule rather than reconstructing them after a tax query.

The first French document is normally the 2047 statement for income received abroad. The official page describes it as an annex for a person domiciled in France who has received income outside metropolitan France and the overseas departments. The current 2026 notice says that foreign-source income must be placed on form 2047 and then carried to the appropriate 2042, 2042 C or 2042 C PRO category when the treaty makes the income taxable in France, grants a credit, or exempts it while retaining it for the effective-rate calculation.

For UK rent from an unfurnished property, calculate the net rental figure under the French category rules. Article 31 of the French General Tax Code states that deductible property charges include specified repairs, maintenance, insurance and other qualifying expenses. The opening words are “Les charges de la propriété déductibles pour la détermination du revenu net comprennent”. That does not mean every cost connected with a UK property is deductible. Capital improvements, acquisition costs, private travel, personal consumption and expenses reimbursed by a tenant must be tested under the applicable rule. Mortgage interest and repairs need their own supporting documents and should not be mixed into a single unexplained “expenses” line.

The simplified micro-foncier regime, meaning the flat-rate regime for qualifying unfurnished rental income, should not be selected by reflex. The threshold, the aggregation of French and foreign property income, the nature of the lease and the treaty method can affect eligibility. The actual-cost régime réel requires more work but may be necessary where the property schedule contains deductible costs or where the official form requires the foreign income to be computed through the property-income annex. The current French tax guidance explains that the 2044 form is used for actual-cost property income and that foreign rental income must be considered with the applicable convention.

Then identify the treaty line. For a French resident whose UK rental income is taxable in the UK under Article 6 and subject to UK tax, the 2026 2047 notice places the United Kingdom among the countries for which the French-credit method applies to relevant income. Under that method, the net amount is reported according to its category and also carried to the treaty-relief section. The notice indicates the 4BK or 4BL lines for foreign property income and the 8TK line for the credit equal to French tax, but forms are periodically amended. Follow the millésime, meaning the tax-year version, actually issued for the return being filed. The property schedule should show why the selected line matches the treaty method.

Do not claim a foreign-tax credit by simply entering the UK withholding shown by an agent. The credit method may be limited to the French tax attributable to the same income, and the tax must have been imposed consistently with the convention. If UK tax was withheld under the non-resident landlord scheme but a later Self Assessment calculation produces a refund, the French file should use the final liability or a clearly explained provisional position, not both. If the UK return is still open, keep the French filing consistent and amend it if the UK amount materially changes.

On the UK side, the official GOV.UK guide to UK income while living abroad states that a non-resident person usually has to file a Self Assessment return where UK property is rented. The rental section points to the property pages and the residence section. A French resident may therefore have three distinct documents: the letting agent’s annual statement, the UK Self Assessment or non-resident landlord calculation, and the French 2047/2042 return. They should reconcile to the same rent and expense schedule even though each country uses different dates, categories and currency rules.

The evidence pack should be assembled before filing:

• the signed lease, renewals and any short-term letting records;
• the land registry or purchase document identifying the owner and the property address;
• the agent’s gross-rent statement, fees, repairs and tax-withholding certificate;
• bank statements showing receipt of rent and payment of claimed expenses;
• invoices for repairs, insurance and interest, separated between capital and revenue items;
• the UK Self Assessment computation, HMRC correspondence and any refund or payment notice;
• the French tax-residence evidence and, where available, a UK certificate or treaty claim document;
• the exchange-rate record used to convert each relevant receipt and expense into euros.

This pack is also useful for a first French return. If you are filing in France for the first time, the online path may not be available and a paper return may be required. The French tax authority’s declaration guidance explains the first-return process and the forms to use. The correct service is generally the Service des impôts des particuliers, or SIP, meaning the French individual tax office connected with your residence. A person who has left France but keeps French-source property income may instead be directed to the non-resident tax service. Confirm the competent office rather than sending a sensitive file to an old address.

There is a separate question about social charges. French income tax treaty relief does not automatically answer every question about social levies, health cover or the taxpayer’s affiliation to a social-security system. The 2047 notice contains specific conditions for social contributions on foreign-source activity and replacement income. UK rental income should be analysed under the rules applicable to property income and the taxpayer’s current social-security position. Do not assume that an S1, a residence permit or a UK tax deduction removes a French social charge without checking the specific rule and the year concerned.

A simple calculation can show why the document trail matters. Suppose the UK letting agent reports £18,000 of rent, £2,000 of qualifying repairs and £1,000 of insurance and agency costs. The French schedule should not use £18,000 as the net property income, nor should it deduct the UK tax withheld as if it were an expense. It should identify the gross receipts, test each cost under the French category rules, produce the net figure, convert the relevant amounts to euros and then apply the treaty method. The example does not predict the tax due: the exchange rate, ownership share, lease type, mortgage interest, other income and form version can change the result.

Article 156 of the French General Tax Code matters where the French property-income calculation produces a deficit. Its current wording describes the income-tax base as the household’s annual net income and sets rules for deficits and carry-forward. A UK landlord should not assume that a French property deficit can automatically reduce salary or pension income. The cause of the deficit, the deductible cost, the applicable limit and the year of the expense must be checked. A spreadsheet that carries a negative number forward without the legal basis is not a sufficient audit file.

The same caution applies to the prélèvement à la source, or French withholding system. Article 204 A of the French General Tax Code includes property income among categories that can give rise to a levy in the year of receipt or realisation, subject to the detailed rules. A treaty credit is normally reconciled through the annual return; it is not necessarily reflected correctly in the monthly rate before the return is processed. Check the final assessment and the credit line rather than relying on the provisional bank debit.

B. What should you do if tax is charged twice or the French return is challenged?

First, distinguish three situations that are often described as “double taxation”. The first is two countries taxing the same net rental income under their domestic rules, with the treaty requiring a credit. The second is a UK withholding that is later reduced by a UK refund, while the French return still shows the original withholding. The third is a French rate effect: the UK rent is neutralised by a French credit but increases the rate applied to other French-taxable income. Only the first two are likely to indicate an error, and the second may be corrected by reconciling the final UK computation.

Next, compare the two assessments line by line. Write down the property, tax year, gross rent, deductible expenses, exchange rate, tax withheld, final tax and the treaty article relied upon. If the French amount is wrong, identify whether the error concerns residence, classification, gross-versus-net income, the selected 2047 line, the 8TK credit, a missing 2042 carry-over or social levies. If the UK amount is wrong, use the HMRC correction or appeal route and keep the French authority informed where the French credit depends on the final UK tax.

A UK resident in France should also understand the effect of a French information request. A notice may ask for leases, bank statements, agent records, repairs, mortgage documents, the UK return and proof of residence. Answering with only the annual agent certificate may leave the authority unable to verify the net amount or the ownership share. Build a short reconciliation table and attach the documents in the order used in the return. Explain any difference between the UK tax year and the French calendar year rather than allowing the difference to look like an omitted month of rent.

French law provides a formal route to challenge an assessment or request a refund. Article L. 190 of the French Book of Tax Procedures places claims concerning errors in the assessment or calculation of tax within the contentious-tax jurisdiction. The article refers to claims seeking the correction of errors or the benefit of a right arising from legislation or regulation. A treaty-credit dispute should therefore be framed around the facts, the domestic rule, the relevant convention article, the figures and the relief requested, not as a general complaint that the tax looks excessive.

Deadlines must be calculated from the notice and the type of tax. Article R*196-1 of the French Book of Tax Procedures provides, for many taxes other than local direct taxes, a deadline ending on 31 December of the second year following the relevant assessment, payment or event. The text begins: “Pour être recevables, les réclamations … doivent être présentées à l’administration”. That general rule has exceptions and does not replace a review of the notice, the tax type and any special deadline. Send the claim through the channel that gives a dated acknowledgement and keep the complete submission.

Where the French administration has issued a proposed adjustment, answer within the deadline shown on the notice and address each ground separately. If the authority says the rent was not received, provide the payment trail. If it says an expense is not deductible, identify the invoice and the legal category. If it denies the treaty credit, provide residence evidence, the UK tax computation, the property address, the relevant treaty article and the French form lines. A request for more time can be useful, but it should not be treated as an automatic suspension of every deadline.

The courts show why “I did not withdraw the money” is not always a defence. In CAA Paris, 2nd chamber, 1 June 2022, no. 21PA00772, the court dealt with a taxpayer whose UK domicile was disputed and whose villa had been rented through an agency. It held that rent placed at the taxpayer’s disposal through the agency could be taxable even though the taxpayer said he had not wanted to receive it. The decision records that the sums “doivent être regardées comme ayant été mises à sa disposition”. The case is not a universal rule for every UK landlord, but it is a practical warning: the agency ledger and the contractual right to receive rent can matter before the money reaches a personal account.

A second decision illustrates the need to read the exact treaty and the exact taxpayer. In CAA Marseille, 4th chamber, 22 October 2013, no. 10MA03968, the court considered a company resident in England and the older France–UK convention. It treated the treaty’s immovable-property wording as covering direct exploitation, letting and other forms of exploitation. That decision is not a personal post-Brexit ruling and should not be copied mechanically into an individual’s return. Its value is narrower: it confirms why the wording of the property article and the legal identity of the landlord must be checked before deciding whether a payment is rent, business profit or a distribution.

If the dispute is already at the administrative-court stage, the competent route depends on the tax and the decision being challenged. Article L. 190 and the surrounding provisions describe the contentious framework, while the assessment notice identifies the service and the available remedy. A request to HMRC does not interrupt a French claim deadline, and a French réclamation contentieuse does not correct a UK Self Assessment. Run the two processes in parallel where necessary, using the same reconciled figures and explaining the relief sought in each country.

Correcting a return is safer than waiting for a full audit. If a French return omitted the UK rent, file an amended return or contact the tax office through the available channel, explain the treaty treatment and attach the 2047 schedule. If the rent was reported but the credit was omitted, identify the exact 2042 and 2047 lines and calculate the requested correction. If the UK withholding later changed, keep the first and final UK calculations and show how the French position should be adjusted. A clean voluntary correction usually gives the authority a more reliable record than an unexplained credit request several years later.

There are also situations where the treaty cannot solve the problem alone. A furnished activity can require a BIC analysis, a company or trust can be treated differently from an individual, and a property jointly owned by spouses or an SCI can create separate filing and beneficial-ownership questions. A mortgage refinancing may create no rental income but can affect interest allocation. A non-resident landlord can have UK filing duties even if the French return is the taxpayer’s main annual return. Where facts cross these boundaries, prepare the factual chronology first and obtain advice on the classification before changing a form line.

As a working checklist, a British resident in France should be able to answer these questions before filing:

• Where was the tax household and principal place of stay during the relevant year?
• Was the person resident in one country, both countries, or resident in one country under the treaty?
• Is the property let unfurnished, furnished, short-term, through an agent, or through an entity?
• What was the gross rent, what was actually received, and what costs qualify under the selected French category?
• Which exchange rate was used for each receipt and expense, and can it be reproduced?
• Which UK tax was withheld, what was the final UK liability, and is a refund pending?
• Which treaty article assigns the taxing right and which French method removes double taxation?
• Were the figures carried consistently from 2047 to 2042 and were the credit or effective-rate lines completed?
• What is the final date for correcting or challenging the French assessment, and how will receipt be proved?

The strongest file is not the one with the most pages. It is the one in which the residence conclusion, property classification, net calculation, currency conversion, treaty method and two-country reconciliation can be followed without guessing. That is particularly important for British owners who moved after Brexit, because an old UK return, a new French return and an agent’s withholding certificate may each be accurate in isolation while still producing the wrong overall result when the treaty is not applied.

Conclusion

UK rental income remains a live French reporting issue after a move to France. The correct sequence is to establish tax residence, identify the property’s source, classify the letting, calculate the net amount in euros, file the relevant French and UK forms and apply Article 6 and Article 24 of the France–UK convention. For many French residents with UK rental income, the 2026 French forms require the income to be declared even where a treaty credit prevents a second full charge. The credit, the effective rate, social levies and the UK withholding must not be treated as interchangeable concepts.

If an authority disputes the position, preserve the original schedules, the final UK calculation, the residence evidence and the dated submissions. A treaty claim is strongest when the legal article, the figures and the evidence point to the same conclusion. A British landlord should not wait for an unexplained tax balance to become a penalty dispute before checking whether the French return has correctly carried the UK property income and relief.