You created a discretionary family trust in Jersey, Guernsey or the Isle of Man many years ago, perhaps on the advice of a London solicitor, to hold investments or the family home for the next generation. Then life moved on: you retired to the Dordogne, or your children settled in France, or the trust itself bought a house near Honfleur. The first letter from the French tax administration comes as a shock, because everything you were told in England about the trust being a separate arrangement counts for very little in France. French tax law looks straight through the trust: it taxes the living constituant (the settlor, the person who put assets into the trust) or, after the settlor’s death, the bénéficiaire réputé constituant (the beneficiary treated by statute as a deemed settlor) on the underlying assets, and it fines non-declaration at 20,000 euros per breach. Two court decisions of the last twelve months, one from the Paris civil court in December 2025 and one from the Cour de cassation in May 2026, show exactly how these rules bite British families and which defences fail. This article explains, in plain English with the French terms translated at each step, when France catches your trust, what must be declared, what death triggers, and how to challenge a bill that gets it wrong.
I. My family trust is English so do I have to declare it in France and pay wealth tax on it
A. Which British trusts France catches and who pays the wealth tax
France gives the word trust a statutory definition that deliberately ignores English labels. The statute provides: “Pour l’application du présent code, on entend par trust l’ensemble des relations juridiques créées dans le droit d’un État autre que la France par une personne qui a la qualité de constituant, par acte entre vifs ou à cause de mort, en vue d’y placer des biens ou droits, sous le contrôle d’un administrateur, dans l’intérêt d’un ou de plusieurs bénéficiaires ou pour la réalisation d’un objectif déterminé” (Article 792-0 bis of the General Tax Code). Every element of that sentence matters for a British reader. The arrangement must come from a foreign law, which covers Jersey, Guernsey, Isle of Man and English trusts alike. It must have a constituant (settlor), an administrateur (the trustee who controls the assets) and one or more bénéficiaires (beneficiaries), or a defined purpose. A protector, a letter of wishes or a power to move the trust to another jurisdiction does not take the arrangement outside the definition; the Paris court treated a Guernsey trust with all of those features as a trust without hesitation in its December 2025 judgment (Paris Civil Court, 11 December 2025, case 23/00261). If your family arrangement looks like a trust under its governing law, France calls it a trust too.
The second mechanism surprises even more people: after the settlor dies, a beneficiary can become the taxpayer. The statute states: After the settlor dies, the statute treats a beneficiary as a deemed settlor for the assets concerned, so each beneficiary answers for the trust property for French tax purposes. That is the rule the Paris court applied to tax the French-resident granddaughter on her share of the Guernsey trust (Paris Civil Court, 11 December 2025, case 23/00261). For death-time transfers the current statute provides: “La transmission par donation ou succession de biens ou droits placés dans un trust ainsi que des produits qui y sont capitalisés est, pour la valeur vénale nette des biens, droits ou produits concernés à la date de la transmission, soumise aux droits de mutation à titre gratuit en fonction du lien de parenté existant entre le constituant et le bénéficiaire” (Article 792-0 bis of the General Tax Code). The Paris Optima case turned entirely on this rule: a Guernsey trust created in 1987, re-settled into a new Guernsey trust in December 2011, whose settlor died in 2012, left a granddaughter living in France holding a share of the trust, and the administration taxed her on it. Grandchildren who have never seen the trust deed, who receive nothing and cannot force the trustee to pay anything, still fall inside the statute where the settlor is dead and they are named beneficiaries. Check the trust deed now for the list of beneficiaries and for what happens on the settlor’s death, because that list decides who France will pursue.
While the settlor is alive and French resident, or a deemed-settlor beneficiary is French resident, the wealth-tax charge follows automatically. The wealth-tax article provides that “Les actifs mentionnés à l’article 965 placés dans un trust défini à l’article 792-0 bis sont compris, pour leur valeur vénale nette au 1er janvier de l’année d’imposition, selon le cas, dans le patrimoine du constituant ou dans celui du bénéficiaire qui est réputé être un constituant en application du II du même article 792-0 bis” (Article 970 of the General Tax Code, as applied in Paris Civil Court, 11 December 2025, case 23/00261). Three points deserve attention. First, the taxable base is the valeur vénale nette au 1er janvier (the net market value on 1 January of the tax year), so a valuation must be produced every year for the French house and for any other taxable property inside the trust. Second, only property within the scope of the modern wealth tax counts: since 2018 that is the impôt sur la fortune immobilière, universally shortened to IFI (the French tax on real-estate wealth), which replaced the old impôt de solidarité sur la fortune, or ISF (the former all-assets wealth tax). Cash, shares and bonds inside the trust are therefore outside IFI, but any French or foreign house, flat or land held through the trust is inside it, and the Paris court applied exactly that boundary to the Optima trust’s property. Third, the older ISF rule survives for closed years and reads in identical terms, as the Cour de cassation recalled: “les biens ou droits placés dans un trust défini à l’article 792-0 bis du même code ainsi que les produits qui y sont capitalisés sont compris, pour leur valeur vénale nette au 1er janvier de l’année d’imposition, selon le cas, dans le patrimoine du constituant ou dans celui du bénéficiaire qui est réputé être un constituant en application du II de l’article 792-0 bis” (Court of Cassation, Commercial Chamber, 28 May 2026, appeal 25-12.326).
The constitutional safety valve exists but it is narrow, and both 2025 and 2026 decisions show how narrow. The Conseil constitutionnel accepts the wealth tax only as a tax on real ability to pay, and the Cour de cassation restated the point last May: “le législateur a entendu frapper la capacité contributive que confère la détention d’un ensemble de biens et de droits” (Constitutional Council, decision 2017-679 QPC of 15 December 2017, cited in Court of Cassation, 28 May 2026, appeal 25-12.326). The capacité contributive (the real ability to pay drawn from the assets, through direct or indirect benefits of any kind) is therefore the only escape from the wealth-tax charge. But the escape has a locked door: “Cette preuve ne saurait résulter uniquement du caractère irrévocable du trust et du pouvoir discrétionnaire de gestion de son administrateur” (Paris Civil Court, 11 December 2025, case 23/00261). In plain terms, telling the tax office that the trust is irrevocable and that the trustee has absolute discretion proves nothing on its own. The granddaughter in the Optima case produced a trustee certificate calling the trust irrevocable and discretionary, a letter of wishes, and even an opinion from Guernsey counsel, and the court still held: “Mme [X] [P] n’a donc pas apporté la preuve, qui lui incombe, que le trust ne lui procurait aucune faculté contributive”, then “CONFIRME la décision de rejet tacite de l’administration fiscale” and “DEBOUTE Mme [X] [P] de l’ensemble de ses demandes”. The lesson for British families is blunt: where the trustee has in fact paid out, housed you, lent to relatives or followed family instructions, the paper claim of discretion collapses, while a beneficiary who truly receives nothing must prove it with bank statements and distribution records, not with certificates bought from the trustee.
The May 2026 Cour de cassation ruling closes the same door from the other side. A couple holding assets through a Swiss family foundation, treated as a trust, argued that the foundation could only pay out in narrowly defined cases of need, so most of the assets gave them no ability to pay and only the sums actually received should be taxed. The Court rejected the argument outright: “Il résulte de ces textes que l’impôt de solidarité sur la fortune et la contribution exceptionnelle sur la fortune sont assis sur l’ensemble des actifs du trust, lorsqu’ils confèrent une capacité contributive aux contribuables, que ceux-ci en aient disposé ou non” (Court of Cassation, Commercial Chamber, 28 May 2026, appeal 25-12.326). The whole of the trust assets are taxed once the ability-to-pay link exists, whether or not the beneficiaries have touched them. The Court also approved the lower courts for finding that ability where the couple had in fact drawn on foundation funds for cash-flow purposes outside the foundation’s stated objects. For a British discretionary trust that has paid school fees, funded deposits or simply stood ready to do so, this ruling means the full property value stays in the French wealth-tax base, and the plafonnement (the statutory capping of wealth tax by reference to income) becomes the only relief, computed with distributed income counted in.
B. The trustee must declare the trust and silence costs 20,000 euros
Declaration is a separate duty from payment, and it falls on the trustee, not on you. The statute provides: “L’administrateur d’un trust défini à l’article 792-0 bis dont le constituant ou l’un au moins des bénéficiaires a son domicile fiscal en France ou qui comprend un bien ou un droit qui y est situé” is bound to declare, alongside administrators outside the European Union who buy French property or enter business relations in France, and administrators resident in France (Article 1649 AB of the General Tax Code). Read that trigger list against a typical British situation: a Jersey trustee with one beneficiary living in Lyon, or a Guernsey trust holding a cottage in Brittany, is caught from the first day, even if no tax is ultimately due. The declaration covers “1° La constitution, la modification ou l’extinction, ainsi que le contenu des termes du trust”, then the identity details of every effective beneficiary, meaning “toutes personnes physiques ayant la qualité d’administrateur, de constituant, de bénéficiaire et, le cas échéant, de protecteur ainsi que de toute autre personne physique exerçant un contrôle effectif sur le trust”, and finally “La valeur vénale au 1er janvier de l’année” of the assets, worldwide for French residents and limited to French assets for the rest (Article 1649 AB of the General Tax Code). In practice the trustee files the creation or amendment return and then the annual value return, form 2181-TRUST2, with the French tax office for non-residents, and the detailed official commentary sits in the administration’s trust section (BOI-DJC-TRUST, French tax administration doctrine on trusts). Write to your trustee now, before the next 1 January, demanding written confirmation that both returns are filed and asking for copies, because the trustee’s default becomes your problem at reassessment time.
The price of silence is fixed by statute and it is severe. The penalty article states: “IV bis. – Les infractions à l’article 1649 AB sont passibles d’une amende de 20 000 €” (Article 1736 of the General Tax Code). Each missing declaration draws its own fine, and interest and surcharges run on any tax recalled alongside it. Trustees in the Crown Dependencies sometimes assume that professional secrecy or distance protects the family; the Optima litigation shows the opposite, with the administration reconstructing eleven beneficiaries, two layers of trusts and a 2011 re-settlement from its own sources. Jersey, Guernsey and the Isle of Man are outside the European Union and have no equivalent shield here, and the Paris court expressly noted that Guernsey “n’a jamais été au sein de l’Union Européenne et n’a conclu aucune convention d’assistance mutuelle avec la France”, which also destroyed the family’s fallback argument under the anti-avoidance article below (Paris Civil Court, 11 December 2025, case 23/00261). Keep the filed returns and the trustee’s acknowledgements of receipt with your French tax file every year, because proof of filing is the only answer to a penalty notice.
The income of the trust draws a third charge that many British families discover late. Where a French resident holds 10 per cent or more of a foreign entity subject to a privileged tax regime, “les bénéfices ou les revenus positifs de cette entité juridique sont réputés constituer un revenu de capitaux mobiliers de cette personne physique dans la proportion des actions, parts ou droits financiers qu’elle détient directement ou indirectement lorsque l’actif ou les biens de la personne morale, de l’organisme, de la fiducie ou de l’institution comparable sont principalement constitués de valeurs mobilières, de créances, de dépôts ou de comptes courants” (Article 123 bis of the General Tax Code). The revenu de capitaux mobiliers (income from movable capital, the French category for investment income) is then taxed in your hands even if the trustee distributes nothing. For trusts the threshold presumption is now automatic: “La condition de détention de 10 % prévue au 1 est présumée satisfaite : a) Par le constituant ou le bénéficiaire réputé constituant d’un trust, au sens de l’article 792-0 bis. La preuve contraire ne peut résulter uniquement du caractère irrévocable du trust et du pouvoir discrétionnaire de gestion de son administrateur” (Paris Civil Court, 11 December 2025, case 23/00261, quoting Article 123 bis). The only exit, for trusts outside the Union without an assistance treaty, is to demonstrate that the structure “a principalement un objet et un effet autres que de permettre la localisation de bénéfices ou de revenus dans un État ou territoire où elle est soumise à un régime fiscal privilégié”, a test the Optima family failed precisely because of Guernsey’s status. A decades-old family trust set up for succession planning rather than tax saving can in principle pass that test, but the file must show the non-tax purpose with contemporaneous documents: the solicitor’s original advice letter, the family circumstances of the time, and the absence of tax-driven features. On the British side of the same picture, note that the United Kingdom taxes non-resident trusts under its own separate code, with the settlor, trustees or beneficiaries charged according to residence and distributions (GOV.UK, Non-resident trusts), so the two systems routinely tax the same income and only the France-United Kingdom double tax treaty, applied line by line, prevents a double charge.
II. What happens when someone dies or the tax office sends a bill and how do you challenge it
A. Death, distributions and French succession duty: the article 750 ter net
Death is the moment the French succession net closes around a British trust, and the net has three meshes. The territoriality article opens with the worldwide mesh: “Sont soumis aux droits de mutation à titre gratuit : 1° Les biens meubles et immeubles situés en France ou hors de France, et notamment les fonds publics, parts d’intérêts, biens ou droits composant un trust défini à l’article 792-0 bis et produits qui y sont capitalisés, créances et généralement toutes les valeurs mobilières françaises ou étrangères de quelque nature qu’elles soient, lorsque le donateur ou le défunt a son domicile fiscal en France au sens de l’article 4 B” (Article 750 ter of the General Tax Code). The droits de mutation à titre gratuit (the French duties on gratuitous transfers, covering both gifts and inheritances) therefore catch everything in the trust, wherever situated, where the deceased settlor was French tax resident. The domicile fiscal (the tax residence defined by French domestic law) turns on the family home, the main stay, professional activity or centre of economic interests, so a British settlor who lived full-time in France for years dies French resident for this purpose even with a British passport and a will made in London. Within that mesh the rate follows the family link between the settlor and each beneficiary under the trust-specific succession scale, with direct-line allowances where the link qualifies and the top 60 per cent rate where settlor and beneficiary are legally unrelated, which is why trust deeds naming friends, carers or unmarried partners as beneficiaries produce shocking assessments.
The second mesh catches French property whatever the residence of the deceased. The same article continues: “Les biens meubles et immeubles, que ces derniers soient possédés directement ou indirectement, situés en France”, including expressly trust assets and capitalised products, “lorsque le donateur ou le défunt n’a pas son domicile fiscal en France au sens de l’article précité” (Article 750 ter of the General Tax Code). A settlor who never left Kent, but whose Guernsey trust holds a villa on the Riviera, leaves that villa inside French succession duty at death. Indirect holding changes nothing: the statute expressly extends to property held through companies or chains of entities, and the French notaire (the public officer who settles every French succession and files the return) will demand the trust deed, the valuation and the family tree before releasing anything. Trustees who refuse to cooperate with the notaire do not protect the beneficiaries; they freeze the French property, because no sale or transfer of a French house completes without the notaire’s deed, and the notaire will not sign while the tax position is unresolved. Warn your trustee in writing that cooperation with the French notaire is part of its duty, and keep that letter.
The third mesh is the one British families miss most often, because it taxes the recipient rather than the deceased. The statute adds: “3° Les biens meubles et immeubles situés en France ou hors de France, et notamment les fonds publics, parts d’intérêts, biens ou droits composant un trust défini à l’article 792-0 bis et produits qui y sont capitalisés, créances et généralement toutes les valeurs mobilières françaises ou étrangères de quelque nature qu’elles soient, reçus par l’héritier, le donataire, le légataire ou le bénéficiaire d’un trust défini au même article 792-0 bis qui a son domicile fiscal en France au sens de l’article 4 B. Toutefois, cette disposition ne s’applique que lorsque l’héritier, le donataire ou le bénéficiaire d’un trust a eu son domicile fiscal en France pendant au moins six années au cours des dix dernières années précédant celle au cours de laquelle il reçoit les biens” (Article 750 ter of the General Tax Code). A daughter who has lived in France for six of the last ten years and receives a distribution or an appointment from her late father’s Jersey trust pays French duty on what she receives, even if her father never set foot in France and the assets never enter France. The six-years-in-ten condition is assessed strictly year by year, so keep the evidence of residence dates: tax returns, health-system registrations, tenancy agreements and school records. Distributions during the settlor’s lifetime are treated separately as taxable income in the beneficiary’s hands, and the treaty tie-breaker on residence plus the treaty’s succession provisions must be checked before paying, because the Franco-British succession position depends on domicile concepts that differ between the two countries and the French return deadline runs from death without waiting for the English grant of probate (the English court order authorising the executors to administer the estate).
Three practical consequences follow for the trust deed itself. First, an English will that says nothing about the trust does not move trust assets, because the trustee owns them and the will disposes only of the deceased’s own property; the trust continues under its terms and France taxes the beneficiaries as deemed settlors. Second, a letter of wishes (the informal guidance letter from the settlor to the trustee, unenforceable in strict law) cuts both ways: the Paris court treated the Optima letter of wishes, which forbade selling the family property, as evidence that the family still called the shots, weakening the claim of pure trustee discretion. Third, powers to transfer the trust to another jurisdiction, which the Optima deed contained and which had already been used once to move assets from the 1987 trust to the 2011 trust, tell the French judge that the family keeps control of the structure. If the deed is under review, any amendment should be made for documented family reasons with the French consequences modelled first, because each amendment is itself a declarable event under article 1649 AB and each re-settlement can restart limitation and valuation disputes.
B. How to challenge an IFI bill or a fine after the 2025 and 2026 rulings
Challenges start with the burden of proof, and the two recent rulings place it squarely on the taxpayer. The family must demonstrate, document by document, that the trust gives it no ability to pay, and the courts have now listed what does not count: the irrevocable label alone, the discretionary label alone, a certificate from a trustee paid by the family, a letter of wishes signed by the deceased settlor, and a foreign counsel opinion that addresses only part of the question. In the Optima case the court went through each item: the trustee’s attestation “qualifie les trusts Quorum et Optima d’irrévocables et discrétionnaires” but came from the family’s own trustee; the Guernsey counsel opinion “porte seulement sur l’absence de possibilité de la part des bénéficiaires de mettre fin au trust” and “ne qualifie pas le trust de discrétionnaire et d’irrévocable”; clause 26 mentioned only “le caractère irrévocable du règlement et non du trust lui-même”; and the deed let the trustee move the trust to another jurisdiction, “donc d’en changer la nature, comme cela avait été le cas dans le transfert des actifs du trust Quorum au trust Optima en 2011” (Paris Civil Court, 11 December 2025, case 23/00261). A winning file therefore looks completely different: full bank statements showing no distributions to the claimant, the trustee’s minutes recording refusals of requests, tenancy agreements proving the claimant never occupied the trust property, loan documents proving family advances came from elsewhere, and independent valuations fixing the 1 January base so that at least the amount is right even where the principle is disputed. Build that file before the administration knocks, because reconstruction after a reassessment notice always looks defensive.
The forum depends on the line disputed, and choosing the wrong court wastes the time limit. IFI and its penalties go to the tribunal judiciaire (the ordinary civil court), exactly the court that decided the Optima case, after a prior written claim to the administration known as the réclamation contentieuse (the formal dispute claim filed with the tax office). Income charged under article 123 bis goes through the administrative courts instead, starting with the tribunal administratif (the administrative court), as the Optima file itself showed with its parallel income-tax proceedings. Succession-duty disputes follow the administrative route as well. Each route has its own strict deadline measured from the assessment or the rejection of the claim, and the claim must identify each disputed item with its legal basis, quantify the discharge sought to the euro, and annex the supporting deeds, valuations and treaty analysis. A letter that says the bill feels unfair, without saying which line offends which article quoted in this guide, earns a template rejection that the court will then confirm, exactly as the Paris court confirmed the implied rejection in Optima. Where cash flow matters, ask in the claim itself for the sursis de paiement (the statutory deferral of the disputed part while the claim is examined), specifying the amount, because deferral is never automatic.
The capping argument deserves its own paragraph because it is the most underused defence in trust cases. The plafonnement of IFI caps the total of wealth tax and income taxes at a fraction of income, and the Optima claimant sought “la restitution partielle de l’impôt sur la fortune immobilière, acquitté à tort, au titre des années 2019 et 2020, d’un montant de 8.580 euros en application des règles du plafonnement de l’impôt” (Paris Civil Court, 11 December 2025, case 23/00261). The court refused, holding that the distributed income counted toward the cap calculation and that the 10 per cent holding presumption applied to a non-treaty trust. The May 2026 Cour de cassation ruling reinforces the point from above: once the ability-to-pay link exists, the full assets sit in the base “que ceux-ci en aient disposé ou non” (Court of Cassation, 28 May 2026, appeal 25-12.326), and only a correctly computed cap, with every element of income and every prior-year adjustment proved, reduces the bill. Run the cap computation with an accountant before litigating the principle, because a well-documented cap claim sometimes recovers more than a heroic assault on the charge itself, and it keeps the dispute within figures the administration can concede without losing face. Keep every assessment, every distribution voucher and every prior return for at least the limitation period plus the current year, since the cap looks backwards and a missing voucher is a missing euro of relief.
Conclusion
A British trust does not cross the Channel invisibly. France defines the trust in its own statute, taxes the settlor while he lives and the deemed-settlor beneficiary after he dies, charges IFI every 1 January on the property inside, demands annual declarations from the trustee on pain of a 20,000-euro fine, layers income tax over undistributed gains through article 123 bis, and catches death-time transfers through all three meshes of article 750 ter, including the six-years-in-ten rule aimed at the French-resident recipient. The Paris court of December 2025 and the Cour de cassation of May 2026 agree on the core: the full assets are taxed once they give the family a real ability to pay, whether or not anything was distributed, and paper claims of irrevocability and discretion prove nothing alone. The defences that remain are practical rather than rhetorical: a complete trustee filing record, yearly 1 January valuations, bank and distribution records proving who truly benefited, a non-tax purpose file for older family trusts, a correctly computed cap, and a timely, quantified claim to the right court. Assemble those papers before the administration writes, answer each line of any assessment with the article it offends, and the file becomes negotiable; arrive with certificates and complaints, and the courts will confirm the bill as they did twice this year.
Need a quick opinion on your case
Our firm offers a telephone consultation within 48 hours with a lawyer of the firm to review your trust deed, your residence position, your IFI assessments and any penalty or reassessment you wish to challenge. First telephone consultation: 80 EUR including VAT. Call 06 46 60 58 22, or write via our contact page with the trust deed, the latest trustee accounts, and the assessment or letter you have received.