I. How is UK rental income taxed in France after Brexit?

A. Is UK rent taxable in France when you become French tax resident?

The first question is not where the bank account is located. It is whether France treats you as tax resident for the relevant period. Under Articles 4 A and 4 B of the French Tax Code, a person whose tax domicile is in France is liable to French income tax on the whole of his or her income. Article 4 A uses the words « en raison de l’ensemble de leurs revenus »: in practical terms, a French resident cannot leave UK rent outside the French return merely because the tenant, agent and property are all in the UK.

French domestic residence is assessed by looking at the household’s home, the main place of stay, the principal professional activity and the centre of economic interests. If both France and the UK could regard you as resident, Article 4 of the France–UK convention on income tax and capital gains, approved by Decree no. 2010-20, supplies the treaty tie-breaker. A retained UK address, a UK bank account or payment of UK tax does not, by itself, decide the question. The evidence should show where your life was actually based during the year.

The second question is the source of the rent. Article 6 of the treaty concerns income from immovable property. Its operative rule is that income from property situated in a contracting state is taxable in that state: the treaty gives the UK a taxing right over rent from UK land. This is why moving to France does not turn a UK letting into a purely French matter. It also explains why an agent may continue to deduct UK tax or why HM Revenue & Customs may require a Self Assessment return after your move.

The third question is how France removes the resulting overlap. Article 24 of the same treaty does not authorise a second full charge. It includes a specific credit method for a French resident with income that is taxable, or taxable only, in the UK. The French text states, in short, « l’impôt du Royaume-Uni n’est pas déductible »: you do not normally deduct UK income tax as if it were an ordinary French rental expense. Instead, the treaty relief is calculated in the form and box corresponding to the treaty method. The French tax calculation must therefore contain the income before the credit is applied.

This distinction matters when the UK result is nil. A UK allowance, personal allowance, deductible finance cost or low level of profit may mean that no UK income tax is payable even though the rent is within the UK tax base. The Conseil d’État, avis of 12 February 2020, no. 435907, examined the France–UK treaty and the credit for French social contributions on UK-source property income. It held that the relevant income had to be included in the UK tax base; it did not require an effective UK payment. The decision expressly says that the income need not have been « soumis à une imposition effective ». That is not a licence to omit the UK return. It is a warning not to confuse “no tax paid” with “income outside the treaty”.

There are two practical consequences. First, prepare the French declaration even if the UK computation produces no liability. Second, do not assume that the French credit will equal the UK tax withheld. Under the treaty’s French-tax-equivalent method, the credit is linked to the French tax corresponding to the relevant net income, subject to the treaty conditions and the return instructions. A withholding certificate can be evidence of UK tax paid, but it is not automatically the French credit calculation.

The same reasoning prevents a common category error. French taxe foncière, taxe d’habitation and the cost of buying a property are separate matters. Rent received from an existing UK property is the subject of this article. The French purchase process belongs to a property transaction brief, while a company or an SCI raises separate entity and cross-border classification issues. Do not transfer a purchase spreadsheet, an SCI balance sheet or a property-tax notice into the rental-income boxes without first identifying the income actually received.

Finally, separate ownership from residence. If a property is jointly owned, each owner normally reports the share attributable to that person, but the exact UK and French rules can differ if the ownership is unequal, held through a partnership, or affected by a trust. The French tax administration’s BOFiP commentary on the France–UK convention confirms that treaty property rules can apply through certain property-holding structures without making the structure invisible under French domestic law. The personal landlord should therefore map legal ownership, beneficial entitlement and actual receipt before completing either return.

B. Which French tax category, deductions and exchange rate apply?

Once residence and treaty allocation are clear, classify the letting under French law. An unfurnished letting generally falls within revenus fonciers, the French category for income from rented buildings. Article 14 of the French Tax Code provides that income from built and certain unbuilt property is included in that category. The French classification is not dictated by the wording used on a British tenancy agreement. A property described in the UK as a furnished holiday let, for example, needs a separate French analysis rather than an automatic copy of the UK label.

For qualifying unfurnished income, the micro-foncier regime may be available where the statutory conditions are met. Article 32 of the French Tax Code sets the familiar threshold of gross annual property income not exceeding €15,000 and a 30% standard allowance, subject to its scope and exclusions. The threshold concerns French-law gross property income, not the amount left after a UK agent’s commission or after UK tax. If you use this regime, keep the gross rent figure, the ownership percentage and the calculation that shows the threshold was respected.

The real regime can produce a different result. Under Article 31 of the French Tax Code, certain expenses connected with the property can be deducted subject to conditions. Depending on the year and the nature of the expense, the file may include repair and maintenance invoices, insurance, management fees, provisions, local charges paid by the owner and qualifying interest. The French deduction is not a translation of the UK SA105 calculation. Mortgage principal, capital improvements, tax paid in the UK and a letting agent’s treatment of a cost must each be tested under the French rule that applies to the chosen regime.

Furnished letting is a different branch. Article 35 of the French Tax Code places the direct or indirect letting of furnished residential premises within the industrial and commercial profits category, usually called BIC (bénéfices industriels et commerciaux). That classification can change the form, the reporting boxes, the treatment of expenses and the social-charge calculation. A British landlord who reports furnished rent as if it were unfurnished rent risks a mismatch between the lease, the French return and the treaty schedule.

Build the French figure from a year-specific ledger. Start with each rent receipt, identify the date received, convert the sterling amount into euros using the rate required by the French return instructions, and record the source of that rate. The official notice for Form 2047 explains that foreign-currency amounts are converted into euros by reference to the exchange rate at the relevant receipt. A monthly bank statement in pounds is not enough on its own: preserve the receipt date, the converted amount and the method used.

Do not mix gross and net figures. The UK agent may show gross rent, repairs, commission, interest and withholding on separate lines. The French return may require gross receipts and then French-law deductions, or a gross amount followed by a fixed allowance. Keep both views. A useful reconciliation table has at least these columns: property and ownership share; tenant receipts; date and GBP amount; euro conversion; UK allowable expenses; French allowable expenses; UK tax withheld or paid; French treaty income; French credit claimed; and the final tax charged in each country.

The treaty does not make every cost deductible in both jurisdictions. A cost can be deductible in the UK but not in France, deductible in France but not in the UK, or allocated differently between an owner and an agent. UK mortgage-interest restrictions are particularly likely to produce a different taxable profit from the French computation. Do not “force” the two totals to match. The correct target is a documented bridge between them.

Keep evidence for ownership and use as well as money. The file should contain the title or land-registry evidence, tenancy agreement, agent statement, annual rent certificate, bank statements, invoices, mortgage-interest statement, insurance, council-tax or local-charge information where relevant, UK tax computation, HMRC correspondence and proof of the date you moved to France. If the property was empty for part of the year, explain why. If a family member occupies it, record whether rent was charged and on what terms. These facts can affect the result without changing the treaty’s basic source rule.

Finally, consider whether the French social-contribution base follows the French net figure. Article L. 136-6 of the Social Security Code starts from the net amount retained for French income tax and includes property income for persons fiscally domiciled in France. The social charge is therefore not an optional add-on that can be ignored because the letting is in the UK. The exact rate and any treaty credit or social-security exception must be examined after the income category and affiliation are known.

II. Which forms, deadlines and double-tax relief should a British landlord use?

A. How do you complete Form 2047, Form 2042 and the UK Self Assessment?

Use a two-country filing calendar. The French income year is the calendar year, whereas the UK tax year normally runs from 6 April to the following 5 April. A rent received in December may fall into one French annual return while a UK accounting period or Self Assessment computation uses a different tax-year window. Mark the two periods at the top of the ledger before copying any total into a return.

For the French side, begin with the current Form 2047 instructions and form page. A French tax resident with foreign income normally attaches Form 2047 to the main return. The form is not just a disclosure schedule: it supplies the path by which the amount is transferred to Form 2042, Form 2042-C or Form 2042-C PRO and by which the relevant treaty method is recorded. The current 2026 form concerns income received in 2025, so check the edition for the income year actually being filed.

For UK rent taxable in the UK while also included in the French calculation, read the France–UK convention instructions before choosing the box. The 2026 Form 2047 contains a section for income taxable in France with a credit equal to the corresponding French tax and points to the total to be carried to line 8TK of Form 2042 in the appropriate case. That reference is not a substitute for the form’s current instructions: furnished income, exempt income with a rate effect and income already reported in a professional schedule can follow another route. The safe sequence is to enter the source income once, identify the treaty article, follow the transfer instruction and check that it has not been entered a second time in a French-property box.

The 2026 Form 2047 PDF is useful because it shows the frames, lines and cross-references for the 2025-income campaign. The accompanying notice explains the two broad treaty mechanisms: a credit for foreign tax, or a credit equal to the French tax on income that the convention leaves taxable in the source state. The France–UK convention can require the second method for the relevant income. Reporting the UK tax deducted at source in the wrong “foreign tax credit” box can produce a credit that is too high, too low or rejected.

On the UK side, use the rental schedule that matches the property and your ownership. The official GOV.UK guidance for UK rental income while living abroad states that UK rent remains within UK tax rules. A person living abroad for six months or more will generally be treated as a non-resident landlord for the Non-Resident Landlord Scheme. A letting agent or, in some cases, a tenant may deduct basic-rate tax from rent unless HMRC approves gross payment.

Gross-payment approval is cash-flow relief, not a tax exemption. Apply through the HMRC Non-Resident Landlord application route, keep the approval and make sure the agent has the correct notice. Even if rent reaches your bank account gross, the UK return may still be required. The UK property schedule records rent and UK deductions; residence information and foreign-residence details are entered through the relevant Self Assessment sections. A tax adviser’s software may ask for the equivalent of the main return, property pages and residence pages, but the underlying evidence should remain the same.

For the 2025–26 UK tax year, the official deadline page gives 31 October 2026 for a paper return and 31 January 2027 for an online return, with any balancing payment generally due on 31 January 2027. If you have to register for Self Assessment, the usual registration date for that year is 5 October 2026. These are calendar points, not permission to wait: a withholding issue, late registration, payments on account or an HMRC notice can change what you need to do. Check whether the online route supports the residence pages you need; some non-resident combinations require commercial software or a paper filing.

France’s filing dates change each year and depend on the department and filing channel. For the 2026 campaign, the official French income-tax deadline page lists staged online deadlines in late May and early June. Use the date displayed for your French address and keep the submission receipt. If you miss a French deadline, filing the UK return on time does not cure the French failure. If you submit a late or amended return, explain the treaty credit rather than paying an avoidable second charge and waiting for the administration to discover the problem.

Before filing, run four reconciliations. First, compare the property rent in the UK agent statement with the gross receipts in the French ledger. Second, compare the UK tax-year total with the calendar-year French total and explain the overlap. Third, compare the French category—revenus fonciers or BIC—with the form used. Fourth, compare the treaty credit with the exact Article 24 method. Keep a copy of both submitted returns, the calculation worksheets, the payment confirmations and the upload acknowledgements. A future query from either administration is much easier to answer when the original logic is visible.

B. Can you reclaim French social charges or challenge a wrong assessment?

Social charges are often the point at which a British landlord discovers that a tax return and a treaty calculation are not the same thing. The French tax administration’s current guidance on social charges on rental income distinguishes the rate applicable to unfurnished and furnished income and explains that the charge is based on net income after the relevant allowance or deductions. The page currently states 17.2% for qualifying unfurnished rental income and 18.6% for qualifying furnished rental income, subject to the applicable rules and year. It also describes an exemption from CSG and CRDS for people affiliated to a social-security system in the European Economic Area or Switzerland who are not covered by a compulsory French scheme, while retaining the solidarity levy in the stated circumstances.

Do not treat a British passport, an S1, private medical insurance or a UK National Insurance record as an automatic answer. After Brexit, the affiliation and the legal basis for it must be established for the person and the period concerned. Obtain the certificate or evidence showing which system covers you, identify whether France considers you covered by a compulsory French scheme, and check the current form boxes. If the administration has already assessed CSG, CRDS or the solidarity levy, calculate the charge line by line before asking for a refund.

The treaty credit is a separate route from an exemption. In its avis no. 435907, the Conseil d’État considered UK-source property income of French residents and the French social contributions assessed on it. The court’s reasoning confirms that the treaty condition looks to whether the income is included in the UK tax base; it does not require the landlord to prove that UK tax was actually collected. The advice also treats the convention’s definition of French tax as relevant to the credit. A claim should therefore say precisely whether it seeks an exemption, a treaty credit, a correction of the income base or all three in the alternative.

There is a second trap: a treaty cannot be read without the domestic rule that creates the charge. In Conseil d’État, 8th–3rd chambers, 31 May 2022, no. 461519, the court recalled that a bilateral convention does not, by itself, create the legal basis for a tax assessment; national law is considered first and the treaty then governs the allocation or relief. The decision states that a convention « ne peut pas, par elle-même, directement servir de base légale ». For a rental dispute, identify the French statutory assessment, the treaty article and the calculation connecting them. A bare assertion that “Brexit means no French charge” is not an adequate claim.

The case law also warns against importing a conclusion from the wrong treaty. In Conseil d’État, 8th–3rd chambers, 19 December 2019, no. 428443, the court examined the treaty treatment of German property income and the limitation of a credit to positive income. That decision is not a France–UK rental ruling, so it cannot replace Article 6 and Article 24 of the France–UK convention. It is nevertheless a useful litigation warning: the calculation must respect the treaty actually governing the property, the type of income and the relevant year. Losses, credits and social charges should never be combined in a single unexplained figure.

If your French assessment is wrong, assemble the challenge before contacting the administration. Put the notice or tax statement at the front; state the year and property; identify whether the error is gross receipts, ownership share, French classification, deduction, exchange rate, social-charge affiliation or treaty credit; attach the UK return and HMRC evidence; and provide a replacement calculation. If the issue concerns an omitted foreign income declaration, explain the correction rather than hiding behind the absence of UK tax. If the error concerns a withholding, attach the agent’s certificate and the bank evidence.

Submit a formal réclamation contentieuse—a tax claim asking the French administration to correct the assessment—through the secure messaging service or the competent tax office, and keep the acknowledgement. Article R*196-1 of the Book of Tax Procedures, in the version in force from 30 July 2026, generally requires a claim no later than 31 December of the second year following the year of assessment, payment or the event giving rise to the claim, depending on the tax. The exact starting point and any special rule must be checked against the notice. Sending an informal email without identifying it as a claim can create a dangerous evidential gap.

If the administration rejects the claim or fails to provide the correction you requested, the next route may be litigation before the administrative court. The court file should contain the original return, the notice, the claim, the administration’s response or proof of silence, the treaty calculation, the source documents and a short chronology. A request for suspension of payment, interest relief or another urgent measure has its own conditions; it should not be added mechanically to the merits claim. The time limit to go to court is linked to the administrative decision and must be checked immediately, especially if the notice is being collected.

Keep the original English and French records for the limitation period. Store the tenancy agreement, ownership evidence, annual agent statements, repair and insurance invoices, mortgage documents, currency calculations, UK and French returns, treaty worksheets, social-security evidence, HMRC correspondence and every message with the French tax office. For a jointly owned property, retain the allocation agreed by the owners. For a furnished property, retain the inventory and the documents supporting the French BIC classification. A clean record is often the difference between a quick correction and a dispute about what was actually received.

Conclusion

A British landlord living in France should expect a coordinated filing exercise, not a choice between the UK and France. The UK retains its source-country taxing right over UK property rent. France generally includes the income when the landlord is French tax resident, classifies it under French rules and then applies the France–UK treaty’s double-tax relief. The correct result depends on the property’s furnished status, ownership, residence dates, deductible costs, currency conversion and social-security position.

The safest annual sequence is simple to describe: prepare one ledger for the UK tax year and one for the French calendar year; classify the letting under French law; complete Form 2047 and the right French return; complete the UK property and residence pages; keep the Non-Resident Landlord approval or withholding evidence; calculate social charges separately; and preserve the documents that prove every transfer. If the assessment is wrong, use the treaty article and the domestic legal basis together, submit a timely formal claim, and do not wait for a generic online answer to expire the statutory deadline.

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