Receiving a letter from a French tax office asking for proof of UK pension income is not the same as receiving a tax reassessment. It is, however, a warning that the return, the foreign-income form or the France–UK treaty analysis has raised a question. A careful response can prevent an incorrect adjustment; a vague reply can leave the administration to classify the payment from incomplete information.
The central issue is not simply whether the UK provider called the payment a pension, a State Pension, an annuity, a lump sum or a tax-free amount. You need to establish your French tax residence for the relevant year, the legal source of the payment, whether it is a private or public-service pension, the gross amount in euros, any UK tax withheld and the treaty article that allocates taxing rights. The same bank credit may require a different treatment if it is a private workplace pension, a government pension, a death benefit or a transfer between pension schemes.
This article explains what to send when the French tax office requests evidence of UK pension income, how to use form 2047 for foreign income, how Articles 18 and 19 of the France–UK tax treaty differ, and how to respond if the request becomes a proposed adjustment. It also identifies the documents that support a treaty claim, the calculation checks that prevent double reporting, and the formal remedies available when the French assessment is wrong.
I. What does a French tax office request for UK pension evidence mean?
A. How to classify your residence and the UK payment before replying
Start with the year named in the letter. Tax residence and the character of a pension are assessed for a particular period. A letter may concern the return filed for 2024 income, the 2025 return filed in 2026, or a correction to an earlier year. Do not answer with a current pension statement alone if the administration is asking about a payment made two years earlier.
The French expression domicile fiscal means tax residence. Article 4 B of the French General Tax Code lists the domestic indicators and begins with the words “Sont considérées comme ayant leur domicile fiscal en France” (Article 4 B, General Tax Code). The administration will usually look at the household or permanent home, the main place of stay, professional activity and the centre of economic interests. British nationality, a UK address on a pension statement or a UK bank account does not settle the question.
The 2008 France–UK convention uses its own treaty test. Article 4 first asks whether domestic law treats you as resident in one or both states. If both states claim residence, the treaty moves through a permanent home, the centre of personal and economic relations, habitual abode and nationality. The official French text is in the decree publishing the convention signed on 19 June 2008. Prepare the evidence that matches the test for the year concerned: French and UK home documents, family location, work or business activity, healthcare registration, travel records, tax residence certificates and the location of financial administration.
The Conseil d’État made the evidential point in its decision of 14 February 1979, no. 06961. In a case concerning a British retired officer, the court held that “ne suffit pas à établir qu’il soit résident du Royaume Uni” merely to rely on nationality and a Crown pension (Conseil d’État, 14 February 1979, no. 06961). The decision concerned the earlier treaty, but the practical lesson remains direct: a pension issued by a British institution does not prove treaty residence in the United Kingdom.
Next classify the payment under French law before applying the treaty. Article 79 of the General Tax Code states that “Les traitements, indemnités, émoluments, salaires, pensions et rentes viagères concourent à la formation du revenu global servant de base à l’impôt sur le revenu” (Article 79, General Tax Code). The article also expressly covers retirement benefits paid in capital form. A one-off payment is therefore not automatically outside the French return simply because no monthly instalment followed it.
Ask the UK provider for a document that explains the legal origin of the payment. The useful description is not only “pension paid”. You need to know whether it was:
- a UK State Pension or another social-security pension;
- a private personal pension, occupational pension or annuity paid for past employment;
- a government-service pension linked to the Civil Service, armed forces or another public body;
- a pension commencement lump sum, an uncrystallised funds pension lump sum or another capital withdrawal;
- a death benefit paid to a beneficiary after the member’s death;
- a transfer to another pension arrangement rather than a payment to you; or
- a refund, surrender, investment payment or compensation that only resembles pension income on the bank statement.
The document should show the scheme name, the provider, the payment date, the gross sterling amount, the components of the payment, the UK tax withheld and the recipient. For a capital payment, request the scheme rules or a provider letter confirming whether the payment was a pension benefit, a transfer or a return of contributions. If the provider has split the amount into tax-free and taxable elements under UK law, obtain the exact split, but do not assume that the UK split controls the French classification.
The UK phrase “tax-free cash” is a domestic description. GOV.UK explains that a person can normally take up to 25% of a pension tax-free subject to the relevant UK limits, but its guidance on tax-free pension lump sums does not decide the French return. France may still need the gross payment and the legal category. A payment that is exempt from UK income tax can remain reportable in France or affect the calculation of French tax.
Keep the original statement as well as a translation or explanation. A bank statement showing “UK pension” is useful proof of receipt, but it does not prove which treaty article applies. Conversely, a provider’s generic tax certificate may confirm the UK withholding but omit the employment or scheme history needed to distinguish private rights from public-service rights.
The distinction matters because the treaty and French domestic rules operate in sequence. First identify the payment. Then identify the treaty residence. Then apply the article allocating taxing rights. Finally complete the French calculation and any credit or exemption mechanism. A response that starts with “the United Kingdom did not tax it” reverses that sequence and leaves the key factual questions unanswered.
B. What the France–UK treaty and form 2047 require
Article 18 of the France–UK convention is the ordinary pension provision. The official text provides: “Sous réserve des dispositions du paragraphe 2 de l’article 19, les pensions et autres rémunérations similaires payées à un résident d’un Etat contractant au titre d’un emploi antérieur ne sont imposables que dans cet Etat” (Article 18, France–UK convention). In practical terms, a private or occupational pension paid to a treaty resident is generally taxable only in that resident state, subject to the treaty wording and the precise facts.
Article 19 is the public-service exception. A pension paid by a state, a local authority or a qualifying public body for services rendered to that body is handled under a separate rule. The treaty generally assigns the pension to the paying state, but the other state can obtain the taxing right where the recipient is resident there and holds that state’s nationality without also holding the paying state’s nationality. Article 19 also contains specific provisions for certain armed-forces, injury and government-service pensions. The provider’s identity and the employment that created the pension must therefore appear in the response.
Do not use the fact that a pension is paid by a large UK insurer as proof that it is private. The insurer may administer a scheme created by a public employer. Ask what entity funded the rights, what employment generated them and whether the payment is within the UK statutory categories referred to in Article 19. If the provider cannot answer, attach the scheme booklet, employment records and any HMRC or pension authority explanation available.
Article 24 deals with the elimination of double taxation. It does not mean that every UK tax deduction creates a French credit. The mechanism depends on whether the income is taxable in France, taxable only in the United Kingdom, included in the UK tax base and covered by the paragraph that applies to that kind of income. The Conseil d’État’s decision of 12 February 2020, no. 435907, explains that “cette condition n’exige pas que les revenus en cause aient été soumis à une imposition effective” for the treaty question examined in that case (Conseil d’État, 12 February 2020, no. 435907). That does not authorise a taxpayer to claim a credit without showing that the income falls within Article 24 and that the applicable conditions are met.
The French tax administration’s foreign-income guidance tells residents to look first at the relevant convention and, where foreign income must be declared, to complete form 2047 before reporting the amount on the principal return. The guidance is available on impots.gouv.fr: taxation of foreign-source income. The current form 2047 page explains that the form is required when a person domiciled in France has received income outside metropolitan France and the overseas departments and regions.
Form 2047 is an information and calculation document, not a treaty ruling. It records the foreign income and directs the amount to the correct line of the 2042 or 2042-C return. The current form and notice must be used for the tax year in question. The official 2026 notice explains that pensions and other foreign income may require a separate line depending on whether France taxes the income, grants a credit equal to French tax, grants a credit based on foreign tax or applies the effective-rate method. The relevant 2026 form 2047 and instructions should be saved with the submitted return.
For a British resident, the answer to the French tax office should explain all three positions separately:
- the amount received from the UK provider, stated in sterling and converted into euros with the method used;
- the classification of the payment under French law and under Article 18 or Article 19 of the treaty; and
- the precise French return line, credit, exemption or effective-rate treatment used for that classification.
If the French office asks why the amount is absent from the main return, show where it appears on form 2047 or explain why the treaty requires a different reporting route. If it asks why the amount was reported but not taxed, attach the treaty analysis and the documents supporting the payment category. If it asks about a UK tax credit, distinguish tax actually withheld, tax merely chargeable under UK law and an amount later repaid by HMRC.
The wording of a request can reveal its procedural stage. A message asking for “renseignements, justifications ou éclaircissements” is connected to the administration’s control powers under Article L10 of the French Tax Procedures Code. The provision says that the administration “peut demander aux contribuables tous renseignements, justifications ou éclaircissements relatifs aux déclarations souscrites” (Article L10, Tax Procedures Code). It is not the same document as a formal proposed adjustment under Article L57.
The distinction should shape the response. At the information stage, give a clear factual and legal explanation with the supporting documents. Do not send a large unindexed bundle. At the proposed-adjustment stage, respond point by point to the stated grounds and preserve every procedural deadline. A request for information can become the factual foundation for an adjustment if the reply is incomplete or inconsistent.
The broad French pension guidance also confirms that foreign pensions that do not receive a credit equal to French tax are ordinarily reported on the relevant pension lines and on form 2047. See impots.gouv.fr guidance on pensions and retirement benefits. The correct boxes vary by year and payment type, so cite the current form rather than copying a box number from a forum or an old return.
If the administration questions treaty residence, link the answer to the existing practical guide on UK pensions in France after Brexit, but do not rely on a generic statement. The file needs the facts for the year requested and the documents that prove them.
II. How should you reply before a French tax reassessment?
A. Which documents and calculations should you send?
Build the response as a short legal file with an index. The first page should identify the tax year, the taxpayer, the reference number on the French letter and the question being answered. State that the response is made within the requested period. If the letter is unclear, ask the office to specify the year, payment or return line concerned, but do not use uncertainty as a reason to miss the stated deadline.
The second page should contain a one-page chronology. Include the date you became resident in France, the date of the UK pension payment, the dates of any UK withholding or repayment, the date the French return and form 2047 were filed, the date of the French request and any earlier exchange with the Service des impôts des particuliers, or SIP, meaning the individual tax office. A chronology often exposes a wrong assumption about the relevant tax year or a duplicate payment.
The core evidence should include:
- the UK pension provider’s annual statement and payment statement;
- the scheme rules or a provider letter explaining the payment category;
- the gross amount, the tax-free or taxable split and the UK tax withheld;
- the bank statement showing the date and amount received;
- the exchange-rate source and the euro calculation;
- the French return, form 2047 and any amended return for the year;
- the relevant French tax notice and the calculation of the assessment;
- evidence of French and UK residence for the year, if Article 4 is in dispute;
- an HMRC residence certificate or treaty-relief correspondence where relevant;
- employment or scheme documents showing whether Article 18 or Article 19 applies; and
- proof of any UK repayment, credit, exemption or tax actually paid.
Keep a clean copy of every PDF sent and note the date and channel of transmission. A secure message through the French tax portal should be saved as a PDF with its attachments and acknowledgement. If documents are sent by post, use a tracked method and keep the delivery record. If the documents are in English, provide a precise translation of the passages that establish the pension category, payment amount and UK tax treatment. Do not translate away the original wording: send both versions.
The calculation should start with the gross sterling amount. Record the exchange-rate source and the date chosen. Show the euro figure used in form 2047, the amount shown on the main return, any French abatement, any quotient calculation and the claimed treaty credit or exemption. If the payment includes several components, give a table separating the private pension, public-service pension, death benefit, contribution refund, transfer and interest components. A single net bank credit is not a sufficient calculation.
For a capital payment, check Article 79 and the 7.5% route under Article 163 bis. Article 163 bis provides that capital retirement benefits may, “sur demande expresse et irrévocable du bénéficiaire”, be subjected to a levy “au taux de 7,5 %” (Article 163 bis, General Tax Code). The same provision requires a non-fractionated payment and proof about the deductibility or exemption of contributions in the state entitled to tax them. A provider’s label is not proof that these conditions are met.
Compare the 7.5% route with the quotient method. Article 163-0 A applies where the income is not normally received annually and exceeds the average of the previous three years. It permits the taxpayer to calculate the additional assessment by “ajoutant le quart du revenu exceptionnel net à son revenu net global imposable et en multipliant par quatre” (Article 163-0 A, General Tax Code). The quotient method reduces the effect of progressive bands; it does not make the receipt exempt.
The distinction between a capital payment and an ordinary pension is not resolved by the payment date or the size of the payment. In Conseil d’État decision no. 384465, the court dealt with pension arrears and described them as having “la nature non d’une indemnité mais d’un revenu imposable” (Conseil d’État, 28 September 2016, no. 384465). The case confirms the need to identify the legal nature of the receipt before choosing a calculation method.
The 7.5% option has a specific procedural safeguard. In Conseil d’État decision no. 397052, the court held that “la demande tendant au bénéfice du prélèvement forfaitaire libératoire peut être formée par le contribuable par voie de réclamation” (Conseil d’État, 14 June 2017, no. 397052). The ruling does not create eligibility for every UK pension. It means that a taxpayer who qualifies should examine the formal claim route rather than assume that a missed election in the original return permanently ends the issue.
The case law also shows why the contribution history belongs in the bundle. In CAA Douai, 14 June 2012, no. 11DA00200, the court examined the source of the contributions and the pension arrangement before treating the payment as “une pension imposable”. The facts are not identical to a modern UK pension lump sum, but the reasoning is practical: identify who funded the rights, what the scheme promised and what was paid.
When you claim treaty relief, state the legal alternative as well. If you say the pension is taxable only in France under Article 18, explain why it is not a government-service pension under Article 19. If you say France must grant a credit, identify Article 24 and the evidence that the income is within the credit mechanism. If you say the item is exempt in France but relevant to the effective rate, explain where it appears on the return and why it does not enter the ordinary French tax base.
The public-service distinction deserves a separate paragraph for former military and government employees. The convention’s Article 19 contains a nationality exception and special wording for certain injury and armed-forces pensions. Attach the employment record, the paying authority, the scheme or statutory basis and any UK letter stating whether the payment is exempt in the United Kingdom. Do not merge a Civil Service pension with a private SIPP or an occupational pension simply because both arrive from a UK account.
The French tax office may also ask why a UK amount differs from the figure shown in the French return. Check whether the provider reports a tax-year total using the UK tax year while France uses the calendar year. Reconcile every payment made between 1 January and 31 December for the French year. Identify exchange-rate differences, pension payments received late, arrears, tax refunds and payments made directly to another account. A reconciliation schedule can resolve a question that otherwise looks like an omission.
If the provider issued a revised statement after the French return, send the original and revised versions together. Explain which one was used in the return and whether the change affects gross income, withholding or the treaty classification. Do not replace the original silently. The administration needs a clear audit trail.
B. What are the deadlines and remedies if the tax office adjusts the return?
A voluntary correction and a proposed adjustment are different procedures. If you discover that your own return omitted a UK pension, used the wrong amount or failed to attach form 2047, correct it through the service provided by the French tax administration where it remains open. The current impots.gouv.fr correction guidance explains the online correction service and the route through the secure messaging system when an online amendment is no longer available. Once an assessment has been issued, the correction normally becomes a formal tax claim.
That formal claim is called a réclamation, meaning a written claim asking the tax administration to correct an assessment. Identify the assessment year, the tax notice, the payment or adjustment challenged, the amount in dispute, the legal grounds and the documents supporting the request. A request saying only “I should not pay tax because the pension is British” is not enough. State whether the dispute concerns residence, classification, the treaty article, the French calculation method, a foreign tax credit or a duplicated amount.
The general claims period appears in Article R196-1 of the French Tax Procedures Code. The provision says claims “doivent être présentées à l’administration au plus tard le 31 décembre de la deuxième année suivant celle” of the relevant assessment, payment or event (Article R196-1, Tax Procedures Code). The starting point depends on the type of tax and the event being challenged. Calculate it from the actual notice and payment records, not from the date on which you found the provider’s mistake.
If the tax office sends a proposed adjustment, called a proposition de rectification, it must state the nature and reasons for the adjustment. Article L57 requires a proposal “motivée de manière à lui permettre de formuler ses observations ou de faire connaître son acceptation” (Article L57, Tax Procedures Code). Reply to each reason in the order given. Do not send a new calculation without explaining why the administration’s calculation is legally and factually wrong.
Article R57-1 requires the administration to invite the taxpayer to accept or make observations within thirty days, with the applicable extension rules. It uses the wording “faire parvenir son acceptation ou ses observations dans un délai de trente jours” (Article R57-1, Tax Procedures Code). Ask for the extension in writing before the original deadline if the file is too large or a provider document is still being obtained. Keep proof of the request.
Your response should open with a short position statement. For example: the payment of £X on date Y was a private occupational pension; the taxpayer was treaty resident in France; Article 18 assigns the taxing right to France; the gross euro amount was declared on form 2047 and the main return; the French calculation used the selected domestic method; and the UK withholding is addressed under the applicable relief route. Adapt that structure to the facts. Do not use it if the payment was public service or if dual residence has not been resolved.
Then use a numbered schedule:
- payment identification and provider evidence;
- residence evidence for the requested year;
- French domestic classification;
- Article 18 or Article 19 treaty analysis;
- form 2047 and 2042 reporting lines;
- gross-to-euro and tax calculation;
- UK withholding, repayment or credit evidence; and
- the precise correction requested from the French tax office.
Attach the treaty and statutory links in the body of the response or cite them by article and paragraph. A tax authority can verify an official link more easily than a general reference to “the double-tax treaty”. Use the version of the treaty and the tax forms applicable to the year under review.
The burden of proving a factual payment or an alleged discharge also matters. Article 1353 of the Civil Code states: “Celui qui réclame l’exécution d’une obligation doit la prouver” (Article 1353, Civil Code). Tax procedure has its own allocation rules, so this general civil-law provision is not a substitute for the Tax Procedures Code. It nevertheless illustrates the practical point: a treaty claim should be supported by documents rather than by an assertion about nationality or the provider’s marketing language.
If the French office says that the UK pension is taxable in France but rejects the chosen 7.5% rate, compare the payment with Article 163 bis line by line. Verify that the payment was not fractionated, that the contributions satisfy the statutory condition and that the same capital has not been declared twice. If the office rejects the quotient method, compare the payment’s recurring or exceptional nature with Article 163-0 A and show the three-year income figures. If the office applies Article 19, obtain the public-service documents before arguing that Article 18 applies.
If the office claims that the UK tax withholding is not a credit, separate three questions: was tax actually withheld, was the income within the UK tax base, and does Article 24 give a credit under the relevant paragraph? The decision in Conseil d’État no. 435907 dealt with the treaty credit mechanism and the relationship between inclusion in the UK tax base and effective UK taxation. It should be cited for the legal question it decided, not used as a general promise that every British deduction will be reimbursed by France.
If the payment was not a pension at all, say so and prove the alternative. A pension transfer, an investment withdrawal, a death benefit and a refund of contributions may have different treaty and domestic treatment. Do not allow the letter’s shorthand to define the payment. Ask the provider to identify the legal basis and the relevant UK legislation or scheme rule.
If the tax office does not answer the claim or rejects it, keep the complete administrative file. The next route may involve the competent administrative court, depending on the assessment and the remedy. Court deadlines are separate from the deadline for submitting a claim to the tax administration. A refusal letter should be reviewed for the date, the stated reasons, the amount maintained and any instructions about challenge. A second explanation sent informally does not always preserve a court deadline.
The strongest response is therefore not the longest response. It is a structured file that lets the officer follow one payment from the provider statement to the bank account, the euro conversion, form 2047, the main return, the treaty article and the requested correction. If an element cannot yet be proved, identify it, explain when it will be supplied and request a short extension before the deadline expires.
Conclusion
A French tax office request for proof of UK pension income is an opportunity to correct the record before an incorrect reassessment is issued. It is also a procedural signal that the administration needs more than a bank statement or the UK label “tax-free”. Establish the residence position for the relevant year, identify the legal source of the payment and distinguish a private pension under Article 18 from a public-service pension under Article 19 of the France–UK convention.
Use the current form 2047 and the corresponding 2042 return, show the gross amount and euro conversion, and explain any French exemption, credit, quotient calculation or 7.5% capital-pension election. Keep the provider’s scheme documents, tax statement, payment record, UK withholding evidence and residence documents together. If the original filing was wrong, a formal réclamation may still be available within the statutory period. If a proposition de rectification arrives, answer its reasons within the response deadline and request an extension in writing when needed.
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