Loan acceleration (decheance du terme) is a contractual sanction by which the lender deprives the borrower of the benefit of the instalment schedule and renders the entire outstanding capital immediately due. For decades it was presented as an automatic mechanism: a missed payment, a letter, a few weeks later the bank issues proceedings. This no longer reflects the law as it stands. Since the landmark ruling of 3 June 2015, the Cour de cassation requires a prior formal notice that has gone unheeded. Since 22 March 2023, it further requires that the notice period be of a reasonable duration, failing which the clause is deemed unwritten. The Court of Justice of the European Union, seized on several occasions, has confirmed this approach and given the national court – including the enforcement judge – an extended power to act of its own motion. This guide sets out these requirements, the defence angles they open, and the procedural consequences when acceleration is, despite everything, maintained.
Definition and consequences of loan acceleration
The term (terme), in the law of obligations, is a future and certain event upon which the enforceability or extinction of an obligation is conditional. In a loan agreement, it takes the form of a repayment schedule: the borrower has the benefit of repaying in instalments over time, the lender agrees to wait. This arrangement is the substance of credit itself. The term is an advantage granted to the borrower, which Article 1305-3 of the Civil Code calls the “benefit of the term.” Loan acceleration is the loss of that benefit.
Concretely, when acceleration is declared, the schedule falls away. The borrower must immediately pay the entirety of the outstanding capital, plus accrued interest and, often, a contractual termination indemnity. A borrower who still owed EUR 120,000 on a twenty-year mortgage may thus find themselves liable for that sum within weeks, on pain of property seizure.
The three cumulative effects
- Immediate enforceability of the outstanding capital, in a single payment.
- Default interest at the contractual rate until effective settlement (Art. L. 312-39 Consumer Code for consumer credit).
- Termination indemnity, capped by decree for consumer credits, subject to the court’s moderating power for others.
- Opening of enforcement proceedings: attachment of bank accounts, wage garnishment, property seizure.
What acceleration is not
Three common confusions must be dispelled. Acceleration is not termination of the loan – the contract subsists, only its performance is precipitated. It is not forfeiture of interest (decheance du droit aux interets), which is an entirely different sanction, pronounced against the lender for pre-contractual breaches. And it is not a simple payment default: an isolated missed payment does not, until acceleration is declared, render the entire capital due.
Legal foundations: Civil Code and Consumer Code
The legal acceleration of Article 1305-4 of the Civil Code
Article 1305-4 provides for acceleration of right in two specific situations: failure to provide a promised security and reduction of an existing security. This is the oldest form, rarely invoked in mass litigation.
The special regime for consumer credit
For consumer credit, Article L. 312-39 provides that upon the borrower’s default, the lender “may demand immediate repayment of the outstanding capital, plus accrued unpaid interest.” For mortgage credit, Articles L. 313-50 and L. 313-51 follow a similar architecture. For consumers, the defence grounds are multiplied by the Consumer Code framework and the control of unfair terms.
The procedure: formal notice, reasonable notice period, notification
The requirement of a prior formal notice
The Cour de cassation established this in now-classical terms on 3 June 2015: “Loan acceleration cannot be declared, save under an express and unequivocal provision, without the service of a formal notice that has gone unheeded, specifying the period allowed to the debtor to remedy the default” (Cass. 1re civ., 3 June 2015, No. 14-15.655, published). The formal notice is the procedural lock. A lender who declares acceleration without first serving one commits an irregularity, and the acceleration is deprived of effect.
The content is also constrained: it must clearly identify the debtor and the contract, detail the sums claimed, fix a time limit for regularisation, and announce, unambiguously, the sanction in the event of inaction.
The reversal of 22 March 2023: the notice period must be reasonable
For years, banks allowed notice periods of eight days or less. The Cour de cassation, in a ruling of 22 March 2023 (No. 21-16.044), put an end to this practice. It held that a clause allowing the lender to terminate without a reasonable notice period created a “sudden aggravation of repayment conditions” constituting a significant imbalance to the consumer’s detriment, and classified the clause as unfair (abusive). The sanction: the clause is deemed unwritten, the termination set aside, the contract continues.
Neither statute nor the Cour de cassation has set a specific duration. Early decisions suggest: eight days is systematically insufficient; fifteen days is contested; one month is generally held to be reasonable. The defence should challenge any formal notice allowing less than thirty days.
Effective notification of the acceleration
The time limit having expired without payment, the acceleration must be effectively notified to the borrower. The Cour de cassation has held that automaticity is not enforceable against a consumer borrower without clear notification. The bank must therefore, after the formal notice has gone unheeded, send a second letter – or include in the original formal notice a clear statement that acceleration will automatically follow upon expiry. It is this notification that fixes the date on which the claim becomes enforceable and starts the limitation period.
Control of unfair terms: the principal defence lever
The criterion of significant imbalance
A clause is unfair under Article L. 212-1 of the Consumer Code if it “has the object or effect of creating, to the consumer’s detriment, a significant imbalance between the rights and obligations of the parties.” The criterion is functional: it is the concrete effect that matters. The assessment is made at the date of the contract’s conclusion.
The Banco Primus ruling and the CJEU framework
The CJEU’s landmark ruling of 26 January 2017, Banco Primus (C-421/14), established a four-criteria analysis:
- Gravity of the breach: does the clause target a breach that is essential relative to the duration and amount of the loan?
- Exceptional character: does the clause derogate from ordinary rules of law?
- Means to remedy: does national law offer the consumer adequate means to regularise before acceleration?
- In concreto assessment: the analysis must be global, considering all clauses and the debtor’s concrete situation.
The sanction: the clause is deemed unwritten
When a clause is found unfair, it is deemed unwritten – it disappears retroactively. The CJEU prohibits the national court from revising or supplementing the clause (CJEU, 14 June 2012, Banco Espanol de Credito, C-618/10). If the acceleration clause itself is set aside, the lender can no longer rely on early enforceability; the contract resumes its normal course; only the instalments actually in arrears at the date of judgment remain claimable.
The court’s power to act of its own motion
Since Cofidis (CJEU, 21 November 2002, C-473/00), the national court is bound to examine of its own motion whether clauses submitted to it are unfair. This obligation applies at every stage: before the court ruling on the merits, before the enforcement judge, and even where the debtor defaults and does not appear.
The enforcement judge’s power deserves particular attention. The CJEU has confirmed (Impuls Leasing Romania, 17 May 2022, C-725/19) that the enforcement judge must be able to disapply an unfair clause, even where it appears in a final enforcement title. A borrower condemned by a first-instance judgment that was not appealed may still, at the property seizure stage, raise the unfair character of the acceleration clause before the enforcement judge.
Lender fault as a defence angle
The duty to warn and improvident lending
The duty to warn (Cass. ch. mixte, 29 June 2007, No. 05-21.104) obliges the lender to alert an unsophisticated borrower when the proposed credit presents a risk of excessive indebtedness. Its breach does not prevent acceleration per se, but it opens the door to damages that may be set off against the debt, sometimes to an extent sufficient to nullify its effective enforceability.
Lender fault in linked credit
For linked credit (financing a specific purchase – a vehicle, solar panels, works), the lender who disburses funds without verifying the regularity of the principal contract and its complete performance commits a fault. If the purchase order is irregular or the service incomplete, the bank that pays the supplier may lose its right to repayment of the capital entirely.
The borrower’s concrete remedies
Amicable negotiation and rearrangement
Before triggering acceleration, most banks will consider a rearrangement proposal: modified schedule, temporary deferral, capitalisation of arrears. This should always be formalised in writing.
Judicial grace periods (Art. 1343-5 Civil Code)
The court may grant a deferral or rescheduling of payment over a maximum of two years. This power is often under-used: it allows a manageable schedule to be re-established and, in practice, neutralises enforcement measures temporarily.
Challenging the acceleration
The core defence lies in judicial challenge on three grounds: procedural irregularity (absent formal notice, insufficient notice period, defective notification), unfair character of the clause (Banco Primus criteria, 22 March 2023 case law), and lender fault (duty to warn, linked credit, contractual breach). These grounds cumulate. Experience shows a well-constructed case rarely rests on a single argument.
Over-indebtedness
Where the situation is irretrievably compromised, filing with the over-indebtedness commission (Art. L. 711-1 et seq. Consumer Code) triggers an automatic stay of enforcement proceedings. See the over-indebtedness guide.
Interaction with neighbouring procedures
- Suretyship: if the acceleration is set aside as unfair, the surety benefits from the same protection. But the lender who failed to provide annual information to the surety also faces forfeiture of interest and penalties for the uncovered period.
- Insolvency: the opening of collective proceedings does not render pre-maturity claims enforceable. The lender cannot accelerate after the opening judgment.
- Property seizure: acceleration is the classic trigger for property seizure proceedings. If the acceleration is successfully challenged before the enforcement judge, the seizure collapses.