You moved to France after Brexit, you receive the UK State Pension, and every spring the same questions return: does France really tax a pension that Britain already taxes through PAYE, where do you declare it, what does the France-UK tax treaty change, and why does your French tax notice sometimes add social charges that look wrong. The short answer is that Brexit changed your residence status, not the tax rule: the 2008 France-UK double tax treaty still decides which country taxes your pension, and for most British retirees living in France, that country is France. But the practical path from that principle to a correct bill is full of traps: British withholding that continues after your move, the celebrated British 25 per cent tax-free lump sum that France does not recognise as tax-free, government-service pensions that follow a different treaty article, and social charges applied to pensioners who should not pay them. This guide explains, step by step, where your UK State Pension is taxed, how France calculates the charge, which mistakes cost British pensioners money, and how to challenge a wrong assessment or a double tax bill within the legal deadlines.<\/p>\n
Everything starts with tax residence, because the treaty gives the right to tax your pension to the country where you live. Under French law, you are treated as having your tax home (domicile fiscal<\/em>, the connecting factor that makes you fully taxable in France) in France as soon as you meet any one of three tests. The statute provides, in its own words: “Sont consid\u00e9r\u00e9es comme ayant leur domicile fiscal en France au sens de l’article 4 A : a. Les personnes qui ont en France leur foyer ou le lieu de leur s\u00e9jour principal”<\/a>. In plain English, if your home (foyer<\/em>, where your family life is centred) or your main place of stay is in France, you are French-resident for tax purposes. A British retiree who settles in the Dordogne, rents or owns a French home, and spends most of the year there meets this test, even if British nationality is retained and a UK bank account is kept. Once that test is met, your worldwide income, including the UK State Pension, falls inside the French tax net, unless a treaty says otherwise.<\/p>\n For pensions, the treaty allocates the taxing right to France, and the French tax administration confirms the mechanism in its official commentary on the France-UK convention signed in London on 19 June 2008. Under Article 18 of that convention, pensions and similar payments made to a resident of one contracting state for past employment are taxable only in that state, so if you are resident in France, your UK State Pension, your former employer’s occupational pension and a personal pension paid for past work are taxable only in France. The United Kingdom keeps no taxing right over them, which is why British withholding on private pensions of French residents is relieved at source through a dedicated claims procedure described in the administration’s official commentary on the convention<\/a>. Any British tax deducted at source after your move is, in principle, recoverable. The United Kingdom keeps no taxing right over them, which means any British tax deducted at source after your move is, in principle, recoverable. The British government itself explains the mechanism on its official guidance for pensioners abroad: where a double taxation agreement exists, you pay tax on your pension only once, in whichever country the agreement designates, and where tax has been paid twice you can claim relief to get some or all of it back (see the official GOV.UK page on tax on the State Pension abroad<\/a>). That page is the starting point for the British side of the file; the French side is the annual income tax return.<\/p>\n Declaring the pension in France surprises many newcomers because the money never passes through a French payer. There is no French employer to report it, so the entire responsibility sits with you. Each spring you file the general income tax return (return no. 2042, the standard yearly declaration of worldwide income) together with the foreign-income schedule (return no. 2047, the annexe on which income from foreign sources is detailed), on which the gross amount of the UK pension, converted into euros, is entered on the pension lines. Two practical points matter here. First, declare the gross pension before any British deduction: the French administration computes French tax on the gross amount and applies its own reliefs, so copying a net-of-PAYE figure understates your income and can trigger a reassessment. Second, keep the Department for Work and Pensions annual statement, the P60 or equivalent letter from any occupational scheme, and the exchange-rate record you used, because if the tax office queries the figure, those three documents close the discussion in one exchange of letters. Interest and dividends from surviving UK savings follow a different route, with withholding and credit mechanics of their own, described in our guide to declaring UK dividends and interest in France<\/a>; do not mix those lines with the pension lines.<\/p>\n One reservation before the calculation: the rule above covers private-sector careers and the State Pension. If any part of your pension rewards service for the British state itself, the civil service, local government, the armed forces or the police, a different treaty article may keep the taxing right in the United Kingdom, and that exception is examined in the second part of this guide. Read the remainder of this article with that distinction in mind, and check each pension source separately rather than treating all your retirement income as one block.<\/p>\n French tax on pensions is not levied on the raw amount you received. The code first grants pensioners a standard allowance (abattement<\/em>, a flat-rate deduction applied before the tax scale), and the wording is worth quoting exactly because it fixes both a ceiling and a floor: “Les pensions et retraites font l’objet d’un abattement de 10 % qui ne peut exc\u00e9der 4 439 \u20ac.”<\/a> The same paragraph adds the safety net for small pensions: “L’abattement indiqu\u00e9 au deuxi\u00e8me alin\u00e9a ne peut \u00eatre inf\u00e9rieur \u00e0 454 \u20ac”<\/a>. Take a concrete example at the figures in force for this guide: a British retiree whose only income is a UK State Pension of 12,000 euros a year deducts 10 per cent, that is 1,200 euros, and is taxed on 10,800 euros. A couple receiving 50,000 euros of combined pensions deducts 5,000 euros but is capped at 4,439 euros, and is taxed on 45,561 euros. The allowance applies per tax household (foyer fiscal<\/em>, all the persons taxed on the same return), which is why the ceiling bites couples harder than single pensioners. Note that foreign-source pensions are expressly included: the code states that net income in each category is assessed under the same rules whether its source is in France or abroad, so a UK pension gets the same 10 per cent as a French one.<\/p>\n The net figure then runs through the ordinary progressive scale (bar\u00e8me<\/em>, the graduated rates applied by slices of income), the same scale that applies to salaries. The current brackets, quoted from the statute, run as follows: “L’imp\u00f4t est calcul\u00e9 en appliquant \u00e0 la fraction de chaque part de revenu qui exc\u00e8de 11 600 \u20ac le taux de : \u2013 11 % pour la fraction sup\u00e9rieure \u00e0 11 600 \u20ac et inf\u00e9rieure ou \u00e9gale \u00e0 29 579 \u20ac ; \u2013 30 % pour la fraction sup\u00e9rieure \u00e0 29 579 \u20ac et inf\u00e9rieure ou \u00e9gale \u00e0 84 577 \u20ac ; \u2013 41 % pour la fraction sup\u00e9rieure \u00e0 84 577 \u20ac et inf\u00e9rieure ou \u00e9gale \u00e0 181 917 \u20ac ; \u2013 45 % pour la fraction sup\u00e9rieure \u00e0 181 917 \u20ac.”<\/a> Because the system works by family quotient (quotient familial<\/em>, the mechanism that divides household income into shares, one per adult and halves for children, to soften progressivity), a married couple with 40,000 euros of pension income is taxed very differently from a single person with the same amount. Run the single case roughly: after the 4,000 euro allowance, 36,000 euros taxable, the slice from 11,600 to 29,579 euros taxed at 11 per cent and the slice above at 30 per cent. The same 40,000 euros for a married couple means 20,000 euros per share, with most of it in the 11 per cent band. This is why advice built on a neighbour’s bill is worthless: household composition changes everything. As a final mechanical point, a UK pension paid gross from Britain bears no French withholding at source (pr\u00e9l\u00e8vement \u00e0 la source<\/em>, the advance deduction operated by French payers), so the tax arrives as a balance on the yearly assessment, often with instalments (acomptes<\/em>, advance payments computed from the previous year’s bill) the following year; budget for that first full bill rather than discovering it in September.<\/p>\n Then comes the question that generates the most disputes: social charges, the CSG and CRDS (contribution sociale g\u00e9n\u00e9ralis\u00e9e<\/em> and contribution au remboursement de la dette sociale<\/em>, the two levies that fund social protection and sit on top of income tax). The CSG on unearned income catches, in the words of the statute, “Les personnes physiques fiscalement domicili\u00e9es en France au sens de l’article 4 B du code g\u00e9n\u00e9ral des imp\u00f4ts”<\/a>, which at first sight includes every British pensioner in France. But European coordination changes the picture for holders of an S1 healthcare certificate (formulaire S1<\/em>, the document by which the British system confirms it remains responsible for your healthcare costs in France). Settled European case law holds that a person affiliated to the social security system of one state cannot be subjected, on the same income, to social charges of another state that are linked to that state’s social security system; that is the principle decided for CSG and CRDS by the Court of Justice in the de Ruyter judgment of 26 February 2015. In practice, a British State Pensioner registered in France with an S1, and therefore remaining within the British social security system for healthcare purposes, should not bear French CSG and CRDS on the pension as if it were ordinary French-source income, and any notice that adds them deserves a line-by-line challenge. Mirror-image, the S1 changes nothing about income tax itself: the treaty still gives France the tax, while the certificate only governs healthcare and the social-charge analysis.<\/p>\n The same logic protects pensioners from a different levy that worries many early movers. France charges a subsidiary health contribution (cotisation subsidiaire maladie<\/em>, the yearly charge on residents with little professional income and substantial capital income, known in practice as the CSM levy) to residents affiliated to the French health system on the PUMA basis (protection universelle maladie<\/em>, the residence-based gateway into French healthcare, which covers people who work in France or live there stably and lawfully: “Toute personne travaillant ou, lorsqu’elle n’exerce pas d’activit\u00e9 professionnelle, r\u00e9sidant en France de mani\u00e8re stable et r\u00e9guli\u00e8re b\u00e9n\u00e9ficie, en cas de maladie ou de maternit\u00e9, de la prise en charge de ses frais de sant\u00e9”<\/a>). But the contribution itself excludes anyone who received a pension during the year, in the statute’s own terms: “Elles n’ont per\u00e7u ni pension de retraite ou d’invalidit\u00e9, ni rente, ni aucun montant d’allocation de ch\u00f4mage au cours de l’ann\u00e9e consid\u00e9r\u00e9e.”<\/a> A British retiree who draws even a small UK State Pension is therefore outside the CSM levy by definition, because the receipt of a retirement pension switches the exclusion on. Households with no pension at all, such as early retirees living on savings before State Pension age, sit in the opposite position and face a completely different calculation, set out in our guide to the CSM levy for British early retirees<\/a>. Knowing which side of that line you stand on saves many readers from paying a charge they never owed.<\/p>\n The first trap is the simplest and the most common: British tax keeps being deducted after you have become French-resident. Occupational schemes and sometimes the analytical habit of payroll software continue to apply PAYE (pay as you earn<\/em>, the British system of deducting tax from wages and pensions before payment) as if you still lived in Leeds, while France taxes the same pension in full under the treaty. The result is genuine double taxation that can persist for years if nobody acts, because neither administration corrects the other spontaneously. The cure sits on the British side: file the double-taxation claim with HM Revenue and Customs (HMRC, the British tax administration) so that the pension is paid gross, and reclaim any British tax wrongly withheld since the date your French residence began, keeping the French assessments as proof that France taxed the income. On the French side, never respond to double withholding by omitting the pension from the French return: an omission converts a recoverable overpayment into a French reassessment with penalties, which is the opposite of a remedy. Declare in France, claim in Britain, and let the treaty allocate the revenue where it belongs.<\/p>\n The second trap concerns the famous British 25 per cent tax-free lump sum (pension commencement lump sum<\/em>, the slice of a private pension pot that British law lets most savers take free of British tax, usually up to a quarter of the fund). Many British advisers describe it as simply tax-free, and in Britain it is. But France has no equivalent exemption for a foreign pension lump sum: once you are French-resident, the treaty gives France the taxing right over pensions and similar payments for past employment, and French domestic law taxes the capital payment as pension income in the year of receipt, with only the ordinary 10 per cent allowance to soften it. A retiree who times a large lump-sum withdrawal for the year after the move to France can therefore manufacture a one-year spike in French taxable income that pushes part of the payment into the 30 or 41 per cent bands. The planning point is timing and measurement: if a lump sum is contemplated, model the French tax cost of taking it as a French resident against the cost of taking it before the move, and spread withdrawals across tax years where the scheme permits. What looks like free money in a British illustration can be expensive money on a French assessment, and no treaty credit fixes it because Britain levied nothing to credit.<\/p>\n The third trap is the Crown-service exception, and it runs in the opposite direction: some British pensions remain taxable only in Britain even when you live in France. The treaty’s public-functions article (Article 19 of the France-UK convention, detailed in the administration’s official commentary on the convention<\/a>) reserves to the paying state the pensions it pays for its own government service: a pension paid by the United Kingdom for service rendered to the British state, its local authorities or its public bodies is taxable only in the United Kingdom. A classic civil service pension, a military pension, a police pension or a National Health Service pension administered as a public scheme therefore stays taxable in the United Kingdom, with an important nuance the treaty adds immediately after: where the recipient is both a resident and a national of France without also being a British national, France recovers the taxing right. Concretely, a British-only national retired from the British civil service and living in France is taxed in Britain on that pension and must still report it in France for the calculation of the effective rate (taux effectif<\/em>, the mechanism by which exempt foreign income can raise the rate applied to taxable income), while a Franco-British dual national in the same position is taxed in France. Misclassifying a Crown pension as an ordinary occupational pension, in either direction, produces exactly the double bill or the missing declaration that ends in reassessment, so identify the legal employer behind each pension before choosing the treaty article.<\/p>\n The fourth trap affects fragmented careers, which are the norm rather than the exception among British residents in France: years in Britain, years in France, sometimes years in a third country such as Monaco, Switzerland or the Gulf. The coordination question is which periods count toward a French pension and at what rate, and the answer recently came, for a British claimant, from the highest French civil court. In a published decision of 7 November 2019, the second civil chamber of the Court of Cassation (Cour de cassation<\/em>, the supreme court for civil matters, which reviews the legal reasoning of appeal courts) examined the case of a British national whose French old-age pension had been cut because years worked in Monaco were ignored. The court recalled the governing principle in these terms: “Mais attendu qu’il r\u00e9sulte de l’article 45 du Trait\u00e9 sur le fonctionnement de l’Union europ\u00e9enne, tel qu’interpr\u00e9t\u00e9 par la Cour de justice de l’Union europ\u00e9enne (CJCE, 15 janvier 2002, aff. C -55\/00, …), que les autorit\u00e9s de s\u00e9curit\u00e9 sociale comp\u00e9tentes d’un premier Etat membre de l’Union europ\u00e9enne sont tenues de prendre en compte, aux fins de l’acquisition du droit \u00e0 prestations de vieillesse, les p\u00e9riodes d’assurance accomplies dans un Etat tiers par un ressortissant d’un second Etat membre lorsque, en pr\u00e9sence des m\u00eames conditions de cotisation, lesdites autorit\u00e9s comp\u00e9tentes reconnaissent, \u00e0 la suite d’une convention internationale bilat\u00e9rale conclue entre le premier Etat membre et l’Etat tiers, la prise en compte de telles p\u00e9riodes accomplies par leurs propres ressortissants”<\/a>. On the facts, the Franco-Monegasque convention contained no clause allowing three-way totalisation with a third state, so the British claimant could not obtain more than a French national in the same position, but he kept the totalisation of his British and French periods. The lesson for British readers with mixed careers is twofold: claim the aggregation of all European insurance periods when your French pension is calculated, with certificates from each country in the file, and accept that periods in a non-European third country aggregate only where a bilateral convention genuinely provides for it. A missing British contribution record is a paperwork problem with a paperwork solution, not a reason to accept a reduced rate.<\/p>\n When the assessment is wrong, the French system offers a ladder of remedies, and the first rung is the cheapest: correct the return. After the online filing deadline, the personal account on the tax website reopens a correction window for several weeks, and even later, an error in your favour or against you can be repaired through the formal claim procedure (r\u00e9clamation contentieuse<\/em>, the written claim by which a taxpayer asks the administration to undo an assessment in whole or in part). The statute defines that procedure broadly: “Les r\u00e9clamations relatives aux imp\u00f4ts, contributions, droits, taxes, redevances, soultes et p\u00e9nalit\u00e9s de toute nature, \u00e9tablis ou recouvr\u00e9s par les agents de l’administration, rel\u00e8vent de la juridiction contentieuse lorsqu’elles tendent \u00e0 obtenir soit la r\u00e9paration d’erreurs commises dans l’assiette ou le calcul des impositions, soit le b\u00e9n\u00e9fice d’un droit r\u00e9sultant d’une disposition l\u00e9gislative ou r\u00e9glementaire.”<\/a> A British pensioner can therefore use it to repair every error this guide describes: a pension taxed without the 10 per cent allowance, CSG and CRDS added to an S1 holder’s pension, a Crown-service pension taxed in France when the treaty reserves it to Britain, or a lump sum assessed in the wrong year. Draft the claim as a lawyer would read it: identify the assessment by year and notice number, state the treaty article or statute relied on, attach the DWP statement, the S1 where relevant, and the proof of British tax paid or reclaimed, and ask expressly for discharge (d\u00e9gr\u00e8vement<\/em>, the cancellation of the wrongly assessed sum) with default interest.<\/p>\nB. How France computes the charge: the 10 per cent relief, the progressive scale and the social charges question<\/h3>\n
II. The traps that cost British pensioners money and the remedies that fix them<\/h2>\n
A. Four traps: British withholding that never stops, the 25 per cent lump sum, Crown-service pensions and fragmented careers<\/h3>\n
B. How to challenge a wrong bill: correct, claim and litigate before the deadlines expire<\/h3>\n