Every autumn, British pensioners living in France ask the same anxious question: will the much-discussed triple-lock rise actually reach a bank account in France, and will the French tax office simply take a share of the increase straight back? The question is sharper this year than ever. With the full rate of the new State Pension now sitting above the United Kingdom personal allowance, an uprated pension can push a retired household into taxable territory on both sides of the Channel for the first time. This article explains, step by step, how the increase works for a British pensioner resident in France, which country is entitled to tax it, how France calculates the tax on the uprated amount, and how to challenge a wrong assessment. French legal terms are explained at first use; the reader is assumed to live in France, to receive a British State Pension paid by the Department for Work and Pensions, and to be resident in France for tax purposes.

I. The Uprating Reaches France, and France Alone Taxes Your State Pension

The starting point is good news. The British State Pension paid to a person living in France is not frozen. It rises each year under the same triple-lock mechanism as a pension paid in Manchester or Glasgow, and the France-United Kingdom double tax treaty of 19 June 2008 then gives France, as a rule, the exclusive right to tax it. Understanding these two building blocks protects against the two most common errors: a pension left frozen when it should have risen, and tax deducted at source in the United Kingdom when only France may tax.

A. Your DWP Pension Keeps Rising in France Under the Triple Lock

The triple lock is the short name for the rule published by the British government under which the new State Pension rises each year by the highest of three figures: average growth in earnings in Great Britain, growth in prices measured by the Consumer Prices Index, or 2.5 per cent. People whose entitlement under the pre-2016 rules was higher than the full rate receive a top-up called a protected payment, which rises only with prices. The official explanation is on the page What you will get under the new State Pension.

Whether that annual increase follows a pensioner abroad depends on the country of residence. The British government states that the pension is uprated each year only for people living in the European Economic Area, Gibraltar, Switzerland, or a country that holds a social-security agreement with the United Kingdom providing for uprating. France belongs to the European Economic Area, so a British pensioner settled in Dordogne, Brittany or Paris receives the uprated amount exactly as if living in Britain. Pensioners who move further afield do not always enjoy the same treatment: in countries with no uprating arrangement, the pension is frozen at the amount first put into payment and later rises never arrive. The official detail sits on the page How your State Pension is affected if you retire abroad. For a British household in France, the practical consequence is straightforward: check the April payment each year, confirm the increase has been applied, and treat a flat payment as an anomaly to be raised with the Department for Work and Pensions, not as the normal post-Brexit fate of the pension.

The scale of the increase is what turns this into a French tax question. The standard United Kingdom personal allowance, the slice of income on which no British tax is due, stands at 12,570 pounds. The full rate of the new State Pension has now crossed that line, which is why search interest in Britain currently pairs the triple lock with the personal allowance and the coming rise. For a pensioner resident in France, that British threshold is only half the story, because the treaty normally removes the United Kingdom from the picture altogether and leaves France to tax the whole pension, increase included. The allowance figure is published at Income Tax rates and Personal Allowances. The computation of the French bill on the uprated pension, including the 10 per cent allowance that France grants on pensions, is examined in Part II; the crossing of the personal allowance is analysed in our companion article on how the British State Pension meets the personal allowance under the treaty credit.

One administrative point deserves attention before leaving London behind. Because the treaty in principle reserves the taxation of the State Pension to France, a British pensioner who has become French-resident should ensure that the United Kingdom does not continue to deduct tax at source as though British residence continued. The allocation of the taxing right flows from Article 18 of the 2008 treaty, examined below: once French residence is established and the treaty position is regularised with the British tax authority, the pension should be paid without United Kingdom deduction, and France collects the tax through its own assessment. Keep every letter from the Department for Work and Pensions showing the gross and uprated amounts: those statements are the primary evidence to attach to the French return and to any later challenge.

B. French Residence Makes France Your Tax Home, and the Treaty Gives France the Pension

French domestic law taxes French residents on their worldwide income. Article 4 A of the General Tax Code (code général des impôts) provides: “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, a person whose tax home (domicile fiscal) is in France pays French income tax on all income, wherever it arises. A British State Pension, including the triple-lock increase, therefore falls inside the French tax base as a matter of domestic law. The official text is here: Article 4 A of the General Tax Code.

The tax home itself is defined by Article 4 B of the same code, whose first test covers people with their household (foyer) or principal place of stay (lieu du séjour principal) in France: “Les personnes qui ont en France leur foyer ou le lieu de leur séjour principal”. The official text is here: Article 4 B of the General Tax Code. For a retired British couple or single pensioner genuinely settled in France, with home, daily life and habitual presence in France, the test is normally met without difficulty. The Conseil d’État, France’s highest administrative court, has clarified how the household test works for a single taxpayer: “le foyer d’un contribuable célibataire s’entend du lieu où il habite normalement et a le centre de sa vie personnelle, sans qu’il soit tenu compte des séjours effectués temporairement ailleurs en raison des nécessités de la profession ou de circonstances exceptionnelles. Le lieu du séjour principal de ce contribuable ne peut déterminer son domicile fiscal que dans l’hypothèse où il ne dispose pas de foyer.” Temporary stays elsewhere for work or exceptional circumstances do not move the household, and the fallback of the principal stay only matters where there is no household at all. That ruling is Conseil d’État, 9th chamber, 11 May 2022, No 450692. Pensioners who split the year between France and Britain should read it carefully, because long visits to grandchildren in Britain do not move a household, while the centre of daily life does. The tiebreaker mechanics for genuinely dual-resident households are set out in our companion piece on the 183-day myth and the treaty tiebreaker.

Once French residence is established, the treaty decides which country may tax the pension, so that the same income is not taxed twice. Article 18 of the France-United Kingdom treaty of 19 June 2008 allocates pensions and similar remuneration paid for past employment to the State of residence, which alone may tax them, subject only to the government-service exception in Article 19. A private-sector State Pension, a workplace pension and a personal pension paid for past employment to a French resident are therefore taxable only in France, and the United Kingdom may not tax them. The full treaty text is published by the British government at 2008 UK-France Double Taxation Convention in force.

One exception matters for former public servants. Article 19 of the same treaty reserves pensions paid by a State or local authority, and for France by a statutory body, for services rendered to that State or body, to the paying State alone. The treaty then returns the pension to the other State only where the pensioner is both resident and national of that other State without also being a national of the paying State. A British civil-service, armed-forces, police, National Health Service or local-authority pension therefore remains taxable only in the United Kingdom, unless the pensioner is French-resident and French-national without also being British, in which case France alone taxes it. A retired teacher with a Teachers’ Pension Scheme pension, a retired soldier and a retired NHS nurse are the typical profiles concerned. The two baskets must never be mixed: the DWP State Pension follows Article 18 and is taxed only in France, while a Crown-service pension follows Article 19 and is usually taxed only in Britain, with France merely taking it into account, if at all, under the credit mechanism described in Part II.

II. France Taxes the Uprated Pension, Then Gives Treaty Relief You Can Enforce

The second half of the analysis is purely French: how the increased pension enters the French assessment, which reliefs soften the charge, and what to do when the assessment is wrong. Three recurrent mistakes affect British pensioners: the missing 10 per cent pension allowance, the denial of treaty relief on the ground that no British tax was actually paid, and the taxation in France of a government-service pension that belongs to London. Each has a precise legal answer.

A. Declaring the Increase, the 10 Per Cent Allowance and the Treaty Credit

French domestic law brings pensions into the general taxable base. Article 79 of the General Tax Code provides: “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.” Pensions and life annuities therefore form part of the overall income (revenu global) on which French income tax is computed: Article 79 of the General Tax Code. Concretely, the gross annual amount of the DWP pension, converted into euros, is declared together with any workplace or private pensions, and the French administration computes the tax on the household total.

Before the rate scale is applied, pensioners benefit from a dedicated allowance. Article 158 of the General Tax Code states: “Les pensions et retraites font l’objet d’un abattement de 10 % qui ne peut excéder 4 439 €.” Every pensioner household therefore deducts 10 per cent of its pensions, within a ceiling applied to the whole household, with a floor protecting small pensions: Article 158 of the General Tax Code. The triple-lock increase is not ring-fenced or taxed separately; it simply swells the pension figure to which the 10 per cent allowance applies, so part of each year’s rise is automatically absorbed by the allowance until the ceiling bites. Taxable income is then divided into portions (parts) according to the household’s situation, the family quotient (quotient familial), under Article 193 of the General Tax Code, and the progressive scale of Article 197 of the General Tax Code is applied to each portion. A married couple with no dependent children is taxed on two portions, a single pensioner on one: the mechanism is identical whether the income is a French retraite or a British State Pension.

The treaty then prevents the double taxation that worldwide taxation would otherwise create. Article 24 of the 2008 treaty, on the elimination of double taxation, requires France to take into account income taxable in the United Kingdom when computing French tax, and then to grant a credit. For income outside the listed investment categories, the credit equals the French tax attributable to that income, granted where the French resident is subject to United Kingdom tax on it. In practice, because Article 18 reserves the State Pension to France, no British tax should have been levied, and France taxes the pension under its own rules while the credit machinery ensures the British element is not taxed twice. Where an element of income was taxable in Britain, typically a government-service pension under Article 19 or employment income, the credit equals the French tax attributable to that income, so the same pounds are never taxed twice in full.

The Conseil d’État has given taxpayers three powerful clarifications on this credit machinery in a formal opinion on the Franco-British treaty, Conseil d’État, 9th and 10th chambers combined, opinion of 12 February 2020, No 435907. First, the opening words of the credit paragraph, which apply notwithstanding any other provision of the treaty, do not let France refuse the credit on French social contributions: they mean that “signifie qu’alors même que d’autres stipulations de la convention prévoient que certains revenus sont imposables ou ne sont imposables qu’au Royaume Uni, ces revenus peuvent néanmoins être pris en compte pour le calcul de l’impôt français.” Read without the introductory verb, the holding is that income taxable or taxable only in the United Kingdom may still be taken into account for computing French tax. Second, the credit does not require tax to have been effectively paid in Britain: “cette condition n’exige pas que les revenus en cause aient été soumis à une imposition effective.” Third, a French resident proves entitlement by showing the income was declared in the British tax base, even with no British tax paid, because the condition “doit être regardée comme satisfaite s’il est établi par le résident de France qu’il a déclaré les revenus en cause au Royaume-Uni, parce que ces revenus étaient compris dans la base de l’un des impôts énumérés au a) du 1 de l’article 2 de la convention, alors même qu’il n’aurait acquitté dans cet Etat aucun impôt à raison de ces revenus.” For a British pensioner in France, the message is direct: an assessor who refuses treaty relief on the ground that no British tax was paid is applying a test the Conseil d’État has expressly rejected.

B. Spotting the Bill’s Errors and Getting Them Corrected

Most wrong assessments affecting the triple-lock rise fall into four patterns, and each maps onto a section of this article that can be cited in correspondence. First, the frozen pension: the April increase never arrived in the DWP payment. The remedy sits in Britain, not in France, through a query to the pension service with the National Insurance number and payment records, because as Part I.A shows, a French-resident pension is uprated. The French tax office cannot fix a DWP payment. Second, British tax deducted at source from the State Pension despite French residence. Under Article 18 the United Kingdom has no taxing right over the payment, so the deduction should be regularised on the British side and the French return should show the gross pension, not the net-of-British-tax figure. Third, the missing 10 per cent allowance: the French assessment taxes the full declared pension without the allowance of Article 158. Recompute the line, attach the calculation, and ask the local tax office (service des impôts des particuliers) to correct it. Fourth, the refused treaty credit: the notice taxes income that belongs to Britain under Article 19, or denies the Article 24 credit because no British tax was paid. The 2020 opinion quoted above answers both points, and it should be cited by its date and number in any letter.

When writing to the administration, build a short evidence pack rather than a long complaint. Include the DWP annual statement showing the gross pension and the uprated April figure, the exchange-rate calculation used for the euro conversion, a copy of the French return with the pension lines highlighted, and one page of legal references: Articles 4 A, 79 and 158 of the General Tax Code, Article 18, or Article 19 for a Crown-service pension, and Article 24 of the treaty, plus the Conseil d’État opinion of 12 February 2020 No 435907 and, for residence disputes, the decision of 11 May 2022 No 450692. Short dated letters that track the assessment line by line are corrected faster than narrative complaints. Keep copies of everything, note the date of each sending, and always reply to the office named on the notice, whose contact details appear on the assessment itself.

If the first reply is unsatisfactory, the file moves up one level at a time: a formal claim to the tax office, then an appeal to the administrative court (tribunal administratif) of the French home, and for treaty interpretation deadlocks the mutual agreement procedure that the treaty organises between the French and British competent authorities. Each route has its own strict time limit, and the limit is printed on the assessment notice or on the rejection letter, so reading that document first and diarising the date is the single most important reflex. Social charges (prélèvements sociaux) deserve a final word: the 2020 opinion treats French social contributions as part of the French tax covered by the credit machinery, which means they follow the same treaty logic as the income tax itself rather than forming a separate unprotected levy. A notice that adds social charges to a treaty-protected pension without applying the credit reasoning should therefore be challenged on exactly the same basis as the income-tax line.

Conclusion

The triple-lock increase is not a British event with French side-effects; for a pensioner settled in France it is a French tax event fed by a British payment. Britain uprates the pension because France sits inside the uprating area, France taxes it because French residence brings worldwide pensions into the French base, and the treaty of 19 June 2008 divides the roles so that the State Pension is taxed only in France while Crown-service pensions are taxed only in Britain. Declare the gross uprated amount, verify the 10 per cent allowance, test every denied credit against the Conseil d’État’s 2020 answers, and challenge line by line with dated evidence. Handled that way, the annual rise remains what it is meant to be: a real increase in spending power, not a paperwork loss.