Cass. 1re civ., 25 March 2026, No. 24-12.848 (partial quashing without remittal)
🔑 Key Takeaways
- The Court confirms that a variable-interest clause indexed to a “3-month CHF rate”, without specifying the exact rate used, is neither clear nor intelligible within the meaning of the former Article L. 132-1 of the Consumer Code (code de la consommation).
- It also confirms that a currency exchange commission clause referring to a scale that was not disclosed at the outset and is not accessible at each transaction creates, by its very design, a significant imbalance.
- These clauses are deemed unwritten from the outset. The bank must refund the difference between the contractual rate and the statutory rate, as well as all the exchange commissions collected.
- However, the Court quashes without remittal the award of €10,000 for non-material damage linked to the irregular acceleration of the loan (déchéance du terme), as the borrower had not made such a claim before the Court of Appeal.
- Above all, the Court rejects the borrower’s claim for €422,933.87 in damages by way of compensation, as she had failed to demonstrate any harm other than non-material harm.
- The strategic lesson is clear: restitution claims based on unfair terms must be quantified rigorously, and financial loss must be supported by concrete evidence (impossibility of refinancing, actual additional costs, etc.).
Table of Contents ▼
- Why Is Swiss Franc Litigation Still Relevant?
- What Happened in This Case?
- Why Are the Variable-Interest and Exchange Commission Clauses Unfair?
- The Variable-Interest Clause: An Untraceable “3-Month CHF Rate”
- The Exchange Commission Clause: An Inaccessible Scale
- The European Backdrop: CJEU Case Law
- What Are the Consequences for the Borrower?
- The Fate of Clauses Deemed Unwritten
- How Is the Refund Calculated?
- Why Is This Victory, Financially, a Pyrrhic Victory?
- Procedural Rigour on the Subject Matter of the Dispute
- The Requirement of Established Financial Loss
- What Strategy Should Swiss Franc Borrowers Adopt?
- FAQ: Frequently Asked Questions
Why Is Swiss Franc Litigation Still Relevant?
Litigation over Swiss franc mortgage loans, known under historic product names such as Helvet Immo but also covering the bullet (in fine) and amortising loans offered by mutual banks in border regions, is not a closed debate. On the contrary, it occupies an increasingly visible place before the French Supreme Court, which since 2023 has issued a growing number of judgments clarifying the applicable legal regime.
The judgment handed down by the First Civil Chamber on 25 March 2026 (No. 24-12.848) confirms a now clear line: clauses that define or remunerate the main subject matter of the contract, such as interest rates and exchange commissions, may be classified as unfair if they are not drafted in a clear and intelligible manner and if they create a significant imbalance to the borrower’s detriment. The method of analysis is sound: it follows in the wake of the judgments of the Court of Justice of the European Union of 3 March 2020 (C-125/18), of 17 November 2021 (order C-655/20) and of 13 July 2023 (Banco Santander, C-265/22).
The 25 March 2026 judgment makes a twofold contribution. First, the Court confirms the solution on the ground of unfairness, closing a debate that still recurs before the lower courts. Second, and this has received less commentary, it sternly reminds borrowers of the procedural and evidentiary constraints they face when seeking compensation beyond simple restitution.
What Happened in This Case?
A borrower had taken out two Swiss franc mortgage loans, in November 2008 and then in December 2010, from a regional branch of Crédit agricole mutuel. The contracts provided for a variable interest rate, presented as indexed to the “3-month CHF rate”, and for a commission collected by the bank on each currency exchange transaction, calculated according to a scale whose terms were not set out in the contract.
In June 2018, the borrower brought proceedings against the bank to have the provisions on adjustable interest and exchange commissions declared unfair. The bank then accelerated the loan (déchéance du terme) and brought a counterclaim for repayment of the sums remaining due.
The Lyon Court of Appeal (cour d’appel), by judgment of 31 January 2024:
- Held that the variable-interest and exchange commission clauses were unfair;
- Deemed these clauses unwritten and substituted the statutory rate for the contractual rate from the outset;
- Ordered the bank to refund the difference between the interest collected at the contractual rate and that which would have been due at the statutory rate;
- Ordered the bank to refund all the exchange commissions unduly collected;
- Ordered the bank to pay €10,000 in damages for the non-material harm arising from the irregular acceleration of the loan.
The bank appealed on points of law on three grounds, challenging both the finding of unfairness and the award for non-material harm. In its judgment of 25 March 2026, the First Civil Chamber rejects the grounds relating to the unfairness of the clauses but upholds the third ground, concerning the €10,000 award, quashing without remittal and definitively rejecting the borrower’s corresponding claim, a claim of €422,933.87 in damages.
Why Are the Variable-Interest and Exchange Commission Clauses Unfair?
The Court’s reasoning on the unfairness of the two clauses is crystal clear. As it has done since 2020, it applies two cumulative conditions derived from Directive 93/13/EEC: first, the lack of clarity and intelligibility; second, a significant imbalance.
A clause is said to “define the main subject matter” when it concerns the essential elements that characterise the contract: in a loan, the amount, the term and the interest rate; in a currency exchange contract, the applicable rate and the commission. Such clauses are in principle exempt from the unfairness review, unless they are not drafted in a clear and intelligible manner. The clarity requirement is therefore an essential gateway, and it is on this ground that most Swiss franc disputes are decided.
The Variable-Interest Clause: An Untraceable “3-Month CHF Rate”
The Court of Appeal had noted a simple but decisive fact: there are several “3-month CHF rates” (the interbank rate, the eurocurrency rate, and reference rates published by various clearing houses), and the contract never specified which one was used. The few references to the “eurocurrency rate” were themselves ambiguous and did not specify that this meant the 3-month CHF eurocurrency in particular.
The French Supreme Court fully endorses this analysis. It holds that the average consumer, reasonably well informed and reasonably observant, could not understand from reading the contract how the rate was concretely calculated, nor assess, on the basis of precise criteria, the economic consequences of the clause for his or her financial obligations. This analytical framework is the one the CJEU has applied since its judgment of 3 March 2020 (C-125/18).
Going further, the Court observes that the clause “reserved to the bank exclusive knowledge of the parameters necessary to calculate the interest”. This structural information asymmetry is, in itself, a source of significant imbalance to the borrower’s detriment.
The Exchange Commission Clause: An Inaccessible Scale
The analysis is the same, only slightly more nuanced, for the exchange commission clause. The Court of Appeal had noted that the clause referred to the application of a scale whose content, at the date of subscription, had been neither communicated to nor accepted by the borrower. Nor did the contract specify how the borrower would be notified of changes to the scale or be able to access it at each transaction.
The Court agrees: such a clause, which gives the bank unilateral and opaque control over a determining element of the cost of credit, is neither clear nor intelligible. And the bank’s ability to apply a scale set unilaterally, without the borrower having been able to accept it or even know it, creates a manifest significant imbalance.
The European Backdrop: CJEU Case Law
The judgment expressly relies on three landmark CJEU decisions:
- CJEU, 3 March 2020, C-125/18: sets out the framework for the transparency review of variable-rate clauses.
- CJEU, 17 November 2021, C-655/20 (order): confirms that a lack of clarity is not in itself sufficient to establish unfairness; a significant imbalance must also be established.
- CJEU, 13 July 2023, Banco Santander, C-265/22: reiterates and clarifies the parameters of judicial review.
- CJEU, 26 January 2017, Banco Primus, C-421/14: provides the method for comparing the contested contractual rate with the rates applied on the market at the date of the contract.
The First Civil Chamber concludes its reasoning with a now classic statement: “in the absence of reasonable doubt, there is no need to refer a question to the Court of Justice of the European Union for a preliminary ruling”. The applicable law is now settled.
What Are the Consequences for the Borrower?
The Fate of Clauses Deemed Unwritten
When a clause is classified as unfair, it is “deemed unwritten” (former Article L. 132-1, now L. 212-1 of the Consumer Code). This technical notion has considerable practical consequences: the clause disappears retroactively from the contract, as if it had never existed. The contract continues to produce its effects, but without the disputed clause.
The expression “deemed unwritten” means that the clause is treated as never having existed, from the inception of the contract. This sanction is retroactive, automatic, and not subject to limitation as regards the classification itself (the French Supreme Court confirmed in 2023 that an action to have an unfair clause removed is not subject to limitation). However, the financial restitution that follows from the removal is subject to the ordinary limitation period running from the date it becomes due.
How Is the Refund Calculated?
In concrete terms, in this case:
- On interest: the contractual rate is replaced by the statutory rate (Article 1907 of the Civil Code (code civil)) from the inception of the contract. The bank must refund the cumulative difference between the interest actually collected and the interest that would have been due at the statutory rate. Over 15 to 18 years of repayment, this differential can amount to tens of thousands of euros.
- On exchange commissions: the bank must refund all the commissions collected. Here the sanction is more radical: there is no substitution mechanism, as the clause is entirely erased. All sums collected on this account are undue.
In this case, the Court of Appeal had ordered the bank, under penalty payments (astreinte), to produce the statements needed for this calculation. This is good procedural practice: the borrower has not always kept all the currency exchange notices, and the bank alone is able to produce a complete history.
Why Is This Victory, Financially, a Pyrrhic Victory?
This is where reading the judgment becomes instructive, and critical. For although the Court confirms the favourable solution on the ground of unfairness, it quashes the award of €10,000 for non-material damage and, above all, definitively rejects the borrower’s claim for €422,933.87 in damages.
Procedural Rigour on the Subject Matter of the Dispute
The quashing is based on Article 4 of the Code of Civil Procedure (code de procédure civile): the subject matter of the dispute is determined by the parties’ respective claims. Yet in her appeal submissions, the borrower had made no claim for non-material harm: she sought only compensation for financial loss, namely the impossibility of refinancing her debt or the constraint of having to pay the sums due immediately.
By ordering the bank to pay €10,000 for non-material harm, the Court of Appeal altered the subject matter of the dispute. Quashing was therefore inevitable. On this point, the solution is technically impeccable and consistent with long-established case law.
The Requirement of Established Financial Loss
The Court’s contribution, and its severity, lie in the quashing without remittal, accompanied by the definitive rejection of the borrower’s claim for €422,933.87. The Court observes that the borrower does not demonstrate that the bank’s fault, relating to the irregular conditions in which the loan was accelerated, caused her any harm other than non-material harm. Failing such a demonstration, her claim for set-off against the bank’s debt is rejected.
The rigour of this reasoning may be questioned. When acceleration of a loan is declared irregularly, the borrower necessarily suffers an immediate effect: he or she becomes liable for the entire outstanding principal and the contractual penalties (in this case, a 7% penalty). This premature due date creates, in itself, a financial loss: that of having to raise funds, refinance or suffer registration on the FICP (the national register of credit repayment incidents). Requiring separate and autonomous proof of an “established” financial loss amounts to asking the borrower to demonstrate the impossibility of refinancing as a condition of compensation, which considerably tightens the evidentiary standard. Legal commentators will point out this tension with earlier, more flexible case law on the autonomy of the loss arising from an irregular acceleration.
This severity has a direct practical effect for Swiss franc borrowers: the legal victory (unfair clauses confirmed) translates into a financial victory only to the extent of the restitution due for the clauses deemed unwritten. Any separate claim for compensation, whether based on breach of the duty to warn, on a misleading commercial practice, or on the irregularity of the acceleration, must now be supported by concrete, quantified evidence, tied to a distinct loss.
What Strategy Should Swiss Franc Borrowers Adopt?
The judgment calls for a three-step strategy:
1. Have the clauses declared unfair
This is the safest and best-charted lever. The action to have the clause removed is not subject to limitation. Retroactive restitution of the interest difference and the commissions. The transparency ground (indeterminate 3-month CHF rate, inaccessible exchange scale) is largely validated.
2. Quantify the restitution precisely
Request production of the statements; failing that, seek an accounting expert report. The interest differential over the life of the loan and the total exchange commissions can represent very significant sums, sometimes exceeding the initial principal.
3. Structure a separate claim for damages
If an additional loss is claimed (loss of the chance to take out a euro-denominated loan, additional cost linked to the acceleration, legal fees incurred in enforcement proceedings), it must be quantified individually, supported by evidence and legally characterised on its own. Do not settle for a global compensation claim: it is now doomed to fail.
Conclusion
The judgment of 25 March 2026 confirms and stabilises the protection offered to Swiss franc borrowers on the ground of unfair terms. The transparency lock is largely open: whenever a variable-interest clause refers to a rate that cannot be precisely identified, and whenever an exchange commission clause refers to a scale that has not been disclosed, unfairness is now almost a foregone conclusion. This is a considerable gain, which should be exploited in all pending cases.
But the judgment also reminds us, with a certain harshness, that a legal victory is not enough to guarantee a financial victory matching the borrower’s expectations. The global compensation claim, based on the irregular acceleration of the loan, is rejected for want of proof of a distinct loss. For borrowers and their counsel alike, this requires stronger procedural discipline: structuring the claim, distinguishing restitution (which follows automatically from the clauses deemed unwritten) from compensation (which requires an established loss), and building the case on precise figures.
The firm, which has for several years defended Swiss franc borrowers (cross-border workers, individuals and professionals) before the lower courts and the French Supreme Court, supports these cases from start to finish: classification of the clauses, reconstruction of the statements, quantification of the restitution, and coordination with any residual damages claims. If you have a Swiss franc loan and are wondering what avenues of action are open to you, do not delay in discussing it with a specialist lawyer: strategy is built upstream, case by case.
