You live in France, you hold a British personal pension or a former employer’s workplace scheme, and the day comes to take the famous 25 per cent tax-free cash. In the United Kingdom that lump sum, properly called a Pension Commencement Lump Sum, feels like a reward for decades of contributions: your provider pays it, HM Revenue and Customs, the British tax authority, treats up to a quarter of each pot as free of British income tax, and the money lands in your account. Then your French tax return comes due, and the shock follows. France does not recognise the British tax-free label. As a person whose tax home, what French law calls the domicile fiscal, is in France, you are taxable here on your worldwide income, and a foreign pension lump sum is, by default, taxable here as pension income. The good news is that the France-United Kingdom double tax treaty of 19 June 2008 reserves the taxation of private pensions to your State of residence, which means France, and forbids the United Kingdom from taxing the same sum again. The better news is that French domestic law offers two genuine routes to soften the bill: the averaging mechanism known as the quotient system, and, in the right circumstances, a flat-rate levy of 7.5 per cent. The trap is that the 7.5 per cent route is closed to the most common British pattern, taking the 25 per cent now while leaving the rest invested for flexible drawdown later. This article explains, step by step, who taxes what, how France calculates the charge, when the flat rate is open, which social charges apply, which forms to file, how to recover any British tax withheld by mistake, and how to challenge double taxation if both countries bill you.

I. Will France Tax My 25 Per Cent UK Pension Lump Sum After Brexit?

The short answer is yes, France taxes it, and the United Kingdom should not. That allocation follows from two layers of rules that fit together: French domestic law, which taxes French residents on everything they receive worldwide, and the bilateral tax treaty, which tells the United Kingdom to stand back. Understanding both layers matters because each tax office tends to read only its own manual, and you are the person caught in the middle when they disagree.

A. What the France-United Kingdom Tax Treaty Says About Your Lump Sum

French domestic law starts with a blunt rule. Article 4 A of the Code général des impôts, the French general tax code, provides that “Les personnes qui ont en France leur domicile fiscal sont passibles de l’impôt sur le revenu en raison de l’ensemble de leurs revenus.” In plain English: if your tax home is in France, you pay French income tax on all of your income, wherever it comes from. A British pension lump sum received into a French bank account by a French tax resident therefore falls inside the French tax net from the first euro. Your domicile fiscal, your tax home, is the connecting factor, and it is determined by familiar tests: where your permanent home sits, where you spend most of your time, where your centre of economic interests lies. Once France is your tax home, the worldwide principle in article 4 A of the Code général des impôts applies to the lump sum exactly as it applies to your salary, your rent or your annual pension instalments.

The treaty then decides which of the two States is allowed to tax. Article 18 of the France-United Kingdom double taxation convention in force is drafted in deliberately wide terms: pensions and similar payments for past employment received by a resident of either State fall under the exclusive taxing right of that State alone. That exclusivity is the strongest formula a treaty can use. It gives France, as your State of residence, the exclusive right to tax a private pension lump sum linked to former employment, and it removes the United Kingdom’s right to tax it. Read the official text in the United Kingdom-France double taxation convention in force, Article 18. One reservation matters: paragraph 2 of article 19 preserves source-State taxation for certain government-service pensions, meaning pensions paid by the State itself for civil-service employment. If your lump sum comes from an ordinary private-sector scheme, a personal pension or a former private employer’s occupational scheme, that reservation does not concern you, and article 18 applies in full.

French courts apply this kind of clause exactly as written. In a decision of 13 October 2022 concerning the identically worded pensions article of another French treaty, the Toulouse administrative court of appeal held that French-source retirement pensions received after the taxpayers became residents of the treaty partner “n’étaient, en application de l’article 18 de la même convention, imposables qu’en Israël”, were taxable only in the residence State under article 18 of that convention. The reasoning is transferable point for point to the British treaty, whose article 18 uses the same exclusive formula. See CAA Toulouse, 1st chamber, 13 October 2022, no. 20TL22832. The lesson for your file is practical: when the French tax office accepts that you are treaty-resident in France, it taxes the lump sum, and when HMRC accepts the same residence position, it must let the payment go without British income tax.

On the British side, the 25 per cent figure itself comes from domestic British law, not from the treaty. The official GOV.UK guidance states that you can usually take up to a quarter of each pension pot as a tax-free lump sum, up to a maximum amount of £268,275. That is the position described on GOV.UK, tax when you get a pension. Two warnings follow for British residents of France. First, the British tax-free label stops at the French border: what London exempts, Paris taxes, because each State applies its own domestic law to the income the treaty assigns to it. Second, British providers frequently deduct emergency tax, an approximated withholding operated through the British PAYE payroll system, from lump sums, especially when the payment is coded as if you were a British taxpayer. Emergency tax is not a final British tax on treaty-exempt income; it is a provisional deduction you recover from HMRC, and the treaty is your legal basis for getting it back.

The recovery instrument has a name you should memorise: the form France-Individual. The British tax authority publishes it specifically for residents of France receiving British-source income covered by the convention. GOV.UK presents the 2009 France-Individual form as the route for French residents to obtain relief at source from British income tax or to reclaim British tax already withheld under the bilateral convention, expressly including pensions and purchased annuities arising in the United Kingdom. See GOV.UK, form France-Individual. In practice you complete the form, your French tax office certifies your French residence on it, and HMRC either authorises your provider to pay future instalments without British withholding, known as relief at source, or repays tax already withheld. The French side of the same procedure is described in the official French tax doctrine: the claimant draws up a request on a France-Particulier form, in French practice called Form France-Individual for individuals, has both language copies completed and signed, and sends them through the local tax office, the Centre des finances publiques, which checks that the convention conditions are met. The doctrine explains that the local tax office checks whether the convention conditions for the residence certificate are met, verifies that both copies of the claim are correctly completed, and investigates where needed before certifying. And since 1 January 2012, exemption from British withholding on British-source interest, royalties and private pensions follows a simplified procedure, with the certified copy sent directly to the British tax administration. See the BOFiP, convention France-Royaume-Uni, paragraphs 320 to 380. File this form before you complain about double taxation: in most lump-sum cases the British deduction disappears at this stage, and there is nothing left to dispute.

For completeness, the treaty also contains a safety net for cases where both States genuinely have a right to tax the same income. Article 24 organises the elimination of double taxation, and for France it works by a tax credit against French tax, granted within the conditions and limits of the article and equal, for income outside the listed categories, to the French tax attributable to that income where the French resident is also subject to British tax on it. Where a progressive scale applies, that attributable French tax is computed from the ratio between the tax actually due on total net taxable income and that total. Read Article 24 in the same convention text, Article 24. For a private pension lump sum covered by article 18, this credit should normally never come into play, because the United Kingdom has no taxing right at all. Keep article 24 in reserve for mixed files, for example where part of a payment relates to government service, or where HMRC refuses relief and you need to show the French office the treaty mechanism that assumes single taxation.

B. How France Calculates the Tax on a Foreign Pension Lump Sum

Once France is confirmed as the taxing State, French domestic calculation rules take over, and they are the same rules that apply to any pension, French or foreign. The official doctrine is explicit: a retirement benefit paid as a lump sum is taxable under the ordinary pension rules of article 158, 5, a of the tax code. See the BOFiP on retirement benefits paid as capital, paragraph 1. Those ordinary rules sit in article 158, 5, a of the tax code: “Les pensions et retraites font l’objet d’un abattement de 10 % qui ne peut excéder 4 439 €. Ce plafond s’applique au montant total des pensions et retraites perçues par l’ensemble des membres du foyer fiscal.” Pensions attract a 10 per cent standard allowance, capped, with the cap applying to the whole tax household, and the allowance “ne peut être inférieur à 454 €, sans pouvoir excéder le montant brut des pensions et retraites”, never below 454 euros and never above the gross amount. The cap is revised each year with the income-tax scale, so check the figure for the year of receipt. Full text at article 158 of the Code général des impôts. In plain terms, a 70,000 euro lump sum is first reduced by the 10 per cent allowance within the cap, then added to your other taxable income for the year and taxed at the progressive scale, the barème progressif, meaning the slice-by-slice rates that rise with income.

Because a lump sum concentrates several years of pension rights into a single year, it can push you into a higher slice of the scale, and French law answers with the quotient system, the système du quotient. Article 163-0 A, I of the tax code provides: “l’intéressé peut demander que l’impôt correspondant soit calculé en ajoutant le quart du revenu exceptionnel net à son revenu net global imposable et en multipliant par quatre la cotisation supplémentaire ainsi obtenue.” You add one quarter of the exceptional income to your ordinary taxable income, compute the extra tax, and multiply that extra by four. The mechanism spreads the progressivity effect without spreading the income itself. See article 163-0 A of the Code général des impôts. The doctrine confirms that retirement lump sums always qualify for this softening: whatever the amount, the portion taxed at the progressive scale can use the quotient mechanism. Same BOFiP, paragraph 10. Take a concrete illustration. A reader with 30,000 euros of ordinary taxable income takes a 70,000 euro lump sum. Without the quotient, 100,000 euros are scaled in one year and the top slices hurt. With the quotient, only 17,500 euros are added to the 30,000 euros, the extra tax on that slice is computed, then multiplied by four. The total stays below the one-shot calculation, often by several thousand euros. You must expressly claim the quotient on your return; the tax office does not apply it on its own initiative.

II. How to Pay Less Tax and Stay Compliant on Your Lump Sum in France

The quotient already reduces the damage, but a second instrument can go further: a flat-rate levy of 7.5 per cent that discharges the income from income tax entirely. It is optional, it is irrevocable, and it is fenced with conditions that exclude the typical British flexible-drawdown pattern. This second part maps the option, the trap, the social charges that sit on top, and the paperwork that keeps you safe.

A. The 7.5 Per Cent Flat-Rate Option and the British Drawdown Trap

Article 163 bis, II of the tax code creates the option in one dense sentence: “Les prestations de retraite versées sous forme de capital imposables conformément au b quinquies du 5 de l’article 158 peuvent, sur demande expresse et irrévocable du bénéficiaire, être soumises à un prélèvement au taux de 7,5 % qui libère les revenus auxquels il s’applique de l’impôt sur le revenu.” On your express and irrevocable request, a qualifying retirement lump sum can bear a 7.5 per cent levy that frees it from income tax. The levy base is generous: “Ce prélèvement est assis sur le montant du capital diminué d’un abattement de 10 %”, the capital minus a 10 per cent allowance, and unlike the ordinary pension allowance this one is uncapped. The same paragraph sets the two great conditions: “Ce prélèvement est applicable lorsque le versement n’est pas fractionné et que le bénéficiaire justifie que les cotisations versées durant la phase de constitution des droits, y compris le cas échéant par l’employeur, étaient déductibles de son revenu imposable ou étaient afférentes à un revenu exonéré dans l’Etat auquel était attribué le droit d’imposer celui-ci.” Single payment, and proof that contributions during the build-up phase were deductible from taxable income or related to exempt income in the State that had the taxing right. Full text at article 163 bis of the Code général des impôts. For foreign pensions the doctrine applies the same test to the foreign law: contributions must have enjoyed a tax advantage abroad, deduction, exemption or non-taxation, for the employee or the employer. The worked test is deliberately practical: add up all contributions ever paid into the scheme, add up those paid in years when they were deductible, and the condition is met when deductible contributions exceed half the total. The doctrine’s own example finds the proof supplied where 24,000 euros of deductible contributions stand against 29,000 euros total, because deductible contributions represent more than 50 per cent. See the BOFiP, paragraphs 230 to 340. British readers usually pass this first test without difficulty: employee contributions to a registered British pension scheme attract tax relief in the United Kingdom, and employer contributions are generally made before British tax, so the deductible share is normally well above half.

The second condition is where British habits collide with French law. The flat rate is reserved for payments that are not split, and the doctrine polices this strictly: the flat rate is reserved for payments that are not split. You must wind up all rights under that scheme and take the capital in one single payment. A taxpayer who takes part of the benefit as capital while keeping the possibility of a later top-up, or who schedules the capital in instalments, cannot use the flat rate. The doctrine expressly names the excluded foreign pattern: schemes that allow partial capital withdrawals staggered over time from a certain age. Foreign schemes operating that way fall inside the exclusion. Same BOFiP, paragraphs 350 to 370. The standard British move, crystallising a pot at 55 or 57, taking 25 per cent tax-free cash and leaving 75 per cent in flexi-access drawdown to draw as you please, is exactly a partial staggered exit: rights remain, further capital withdrawals stay possible. That lump sum is taxed at the progressive scale with the quotient, not at 7.5 per cent. The flat rate remains available in two British configurations. Full encashment of a small pot in one go, where the whole scheme is closed and nothing can be drawn later, meets the single-payment test. So does splitting rights at outset between a one-off capital payment and a genuine annuity, what French practice calls a rente, provided the capital is paid once and all remaining rights can only ever be drawn as annuity: a taxpayer who settles rights partly as capital and partly as annuity can claim the flat rate on the capital part only where it is paid in a single payment and either all rights are settled or the balance can henceforth be drawn solely as annuity. Same BOFiP, paragraph 380. Before you crystallise, ask your provider for written confirmation of what remains possible afterwards; that letter decides your French tax route.

Claiming the flat rate is a formal step with no second chance. The flat rate applies only on your express and irrevocable request. You exercise the option by entering the qualifying amount on the dedicated 7.5 per cent capital-pensions line of the overall income return no. 2042, for the year the funds were made available. The same amount must not also appear on the ordinary pensions line, and the doctrine recommends stating the nature and amount of the qualifying benefit in the return information box. The base is then the capital minus a 10 per cent allowance, applied to the whole capital with no cap, while none of the deductions or allowances of progressive-scale taxation apply, including the ordinary capped pension allowance. The capital is taken gross, before any foreign tax or social deductions. Same BOFiP, paragraphs 420 to 470. Arithmetic comparison is worth doing with your adviser: at 7.5 per cent on 90 per cent of the sum, a 70,000 euro qualifying lump sum costs 4,725 euros of French income tax, against a scale-plus-quotient charge that can be twice as high for a well-paid household, or lower for a modest one. And because the option is irrevocable, run both calculations before you tick the box.

Income tax is only half the French bill. Pensions also bear social charges, the CSG, contribution sociale généralisée, and its companions the CRDS and CASA, at rates that depend on your income. The code sets the standard picture plainly: “Sont assujetties à la contribution au taux de 8,3 % les pensions de retraite, et les pensions d’invalidité”, while a reduced 3.8 per cent rate applies below yearly income thresholds assessed on the household’s reference income two years earlier. See article L. 136-8 of the Code de la sécurité sociale. Whether these charges can touch a British pension at all depends on your health cover, and here European coordination law draws a hard line. A person covered by the social security legislation of a single Member State cannot be charged twice. The Court of Cassation recalls that the European regulations “consacrent le principe d’unicité de la législation sociale selon lequel la personne à laquelle les règlements s’appliquent n’est soumise qu’à la législation d’un seul Etat membre, en sorte que celle-ci, affiliée à un régime de sécurité sociale d’un Etat membre, ne doit pas contribuer au régime de sécurité sociale d’un autre Etat membre”, citing the Court of Justice’s De Ruyter judgment of 26 February 2015. See Cass., 2nd civil chamber, 6 June 2024, no. 21-23.396. The same court restates the principle in pension terms: the regulation “pose le principe d’unicité de la législation applicable et fait prévaloir celle de l’Etat où est exercée l’activité”. See Cass., 2nd civil chamber, 9 May 2018, no. 17-16.341. Concretely, a British retiree in France who holds a British S1 Portable Document, the certificate by which the United Kingdom, under the EU-United Kingdom coordination rules that continue to operate for health care, takes charge of health costs, and who is therefore insured in the British scheme rather than the French one, has a serious argument that French social charges on the pension should not apply, while a retiree affiliated to the French system through PUMA, the Protection universelle maladie, the French universal health cover, pays them. Do not guess your status: check which State issued your S1, confirm with your CPAM, the Caisse primaire d’assurance maladie, your local French health fund, and keep the certificate with your tax file, because the tax office and the health fund do not always read from the same page.

B. Declaring the Lump Sum, Reclaiming British Tax and Challenging Double Tax

Declaration comes first, and the duty is general. Article 170 of the tax code provides: “En vue de l’établissement de l’impôt sur le revenu, toute personne imposable audit impôt est tenue de souscrire et de faire parvenir à l’administration une déclaration détaillée de ses revenus et bénéfices, de ses charges de famille et des autres éléments nécessaires au calcul de l’impôt sur le revenu”. Everyone liable to income tax must file a detailed return. See article 170 of the Code général des impôts. For a British lump sum, two forms work together. Form 2047, the return for income received abroad, is the entry point: anyone domiciled in France who has received income from outside mainland France and the overseas departments must file it alongside the overall income return. See impots.gouv.fr, form no. 2047. You detail the lump sum there, then carry it to the main 2042 return, either on the ordinary pensions line with a quotient claim, or on the 7.5 per cent line if you take the flat-rate option. Attach your provider’s payment statement, the P60-style certificate or final statement showing the gross amount and any British tax deducted, your France-Individual certificate once stamped, and, where relevant, the provider letter confirming whether the payment closed the scheme. Declare the gross capital before British deductions: the French base is computed on the amount due to you, not on what arrived after HMRC’s cut.

If British tax was withheld despite the treaty, act on both fronts at once. Send the France-Individual route to HMRC for repayment, as described above, and tell your French tax office, in the return’s information box and by separate letter, that a British deduction was operated on treaty-exempt income and that repayment has been requested. This prevents the French office from treating the British deduction as a final foreign tax credit case and keeps your file coherent. If both States then insist on keeping a slice, challenge methodically. Start with a written claim, a réclamation, to the French tax office that issued the assessment, setting out the treaty article, the residence position and the calculation, with every certificate attached. If the office maintains the charge, appeal to the administrative court, the tribunal administratif, which can discharge treaty-incompatible assessments, as the Toulouse court did when it granted discharge for the years where exclusive residence-State taxation applied and a reduction for the transitional year. Time limits are short, generally running from the assessment notice, so diary them on receipt and do not wait for HMRC’s answer before protecting your French position. Keep everything until every audit and appeal deadline has expired: assessment notices from both countries, the stamped France-Individual, provider statements, the S1 if you hold one, and the scheme letter on single versus staggered payment. Most lump-sum disputes are won on paper, not in hearings, and the paper you lack is the argument you lose.

Conclusion

A British 25 per cent pension lump sum received while you live in France sits at the meeting point of three logics: British law that exempts it, a treaty that assigns it to France alone, and French law that taxes it as pension income with two built-in softeners. Get the order right. Confirm French treaty residence so the United Kingdom stands back under article 18, recover any British emergency withholding through the France-Individual procedure rather than accepting it as fate, declare the gross sum on forms 2047 and 2042, claim the quotient systematically at the progressive scale, and test the 7.5 per cent flat rate only when the payment truly closes the scheme in one go with deductible contributions behind it. Check your S1 position before accepting social charges, and challenge promptly, first by claim to the tax office and then before the administrative court, if both countries bill the same pounds. Handled in that order, the British tax-free cash stays close to tax-free in substance, even though French law never calls it that.

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To receive a telephone consultation within 48 hours with a lawyer of the firm, call +33 6 46 60 58 22. You can also reach us through our contact page. Maître Reda Kohen advises British residents of France on pensions, residence and double taxation.