Trial Period: Legal Duration and Termination

The trial period is an unavoidable contractual phase in any employment relationship. It allows the employer to assess the employee's skills and the employee to verify that the position meets their expectations. However, its rules — maximum duration, renewal conditions, notice periods in the event of termination — are often poorly understood, exposing companies to significant legal risks. This article reviews the regulations in force in 2026, best practices to adopt and modern tools, notably electronic signature for HR, which make it possible to secure each stage of contractual management.

Legal Duration of the Trial Period According to Contract Type

The duration of the trial period varies depending on the nature of the employment contract and the professional category of the employee. The Labour Code, in articles L. 1221-19 to L. 1221-26, sets mandatory ceilings that employers cannot exceed, even with the employee's agreement.

Indefinite Employment Contract (CDI): Maximum Durations by Category

For indefinite-term employment contracts (CDI), the initial maximum durations are as follows:

• Workers and employees: 2 months

• Supervisory staff and technicians: 3 months

• Managers: 4 months

These durations may be reduced by sectoral agreement or collective bargaining agreement, but cannot in any case be extended beyond the legal ceilings by simple individual agreement between the parties. It is important to note that the trial period must be expressly stated in the employment contract or engagement letter to be enforceable against the employee.

Fixed-Term Contract (CDD): A Trial Period Proportional to Contract Duration

For fixed-term employment contracts (CDD), the duration of the trial period is calculated at the rate of one day per week of work, limited to:

• 2 weeks for CDDs with a duration of 6 months or less

• 1 month for CDDs of more than 6 months

No collective bargaining agreement may extend these durations for CDDs. The proportionality rule applies strictly, and any breach exposes the employer to contract reclassification or damages.

Special Cases: Apprenticeship Contracts, Temporary Work and Work-Study

Apprenticeship contracts do not have a trial period as such, but an observation period of 45 calendar days during which either party may terminate the contract without justification. For temporary work contracts (agency work), the trial period is calculated at the rate of one day per week, limited to 2 days for assignments of less than 1 month, and 3 days beyond. These nuances are essential for HR departments managing multiple contractual profiles simultaneously.

Renewal of the Trial Period: Strict Conditions

The law permits renewal of the trial period, but only under very specific conditions. Only one renewal is possible, and only when expressly provided for by an extended sectoral agreement. The employer's unilateral will or an individual agreement is not sufficient.

Cumulative Conditions for Renewal

For a renewal to be valid, three conditions must be met simultaneously:

• An extended sectoral agreement must expressly authorise renewal for the professional category concerned.

• The renewal must be provided for in the initial employment contract or engagement letter, or in an amendment signed before the expiry of the initial period.

• The employee must have given express agreement to the renewal, in unequivocal manner. The case law of the Court of Cassation is consistent on this point: mere continuation of work does not constitute acceptance.

In the case of a valid renewal, the total durations (initial period + renewal) cannot exceed: 4 months for workers and employees, 6 months for supervisory staff and technicians, and 8 months for managers.

The Employee's Express Agreement: A Major Documentary Issue

The requirement for the employee's express agreement to renewal is a central documentary issue. A simple verbal exchange does not constitute sufficient proof in the event of dispute. This is precisely the context in which the dematerialisation of HR documents takes on its full significance. Using electronic signature compliant with eIDAS to formalise the renewal amendment guarantees traceability, time stamping and document integrity. The Certyneo solution allows you to obtain this agreement in a few minutes, with a complete audit trail.

Termination of the Trial Period: Rules and Notice Periods

During the trial period, both the employer and the employee may terminate the contract freely, without having to justify their decision and without severance pay. This freedom is, however, subject to mandatory notice periods, introduced by the Law of 25 June 2008 on the modernisation of the labour market.

Notice Periods Required from the Employer

When the employer terminates the trial period, they must comply with a notice period calculated according to the duration of the employee's presence in the company:

• Less than 8 days of presence: 24 hours

• Between 8 days and 1 month of presence: 48 hours

• Between 1 and 3 months of presence: 2 weeks

• Beyond 3 months of presence: 1 month

If the employer does not respect this period, they must pay the employee compensation equal to the salary corresponding to the duration of the notice period not respected. This compensation is due even if termination occurs during the trial period rather than afterwards.

Notice Periods Required from the Employee

When the employee terminates the trial period, they must give notice of:

• 24 hours if their presence in the company is less than 8 days

• 48 hours beyond 8 days of presence

These periods are of public policy and apply even in the absence of contractual provision.

Wrongful Termination: Limits to the Freedom to Terminate

Whilst the trial period allows termination in principle, this freedom has significant case law limitations. Termination is considered wrongful — and thus liable to result in damages — in several cases: termination motivated by a discriminatory reason (pregnancy, health condition, origin, etc.), termination occurring in a context suggesting misuse of the trial period (for example, systematic use of trial periods to perform one-off work without permanent hiring), or termination notified in an abrupt manner without respecting usual formalities.

It is therefore strongly recommended to formalise the termination notification in writing, via a time-stamped and traceable document. A comprehensive guide to electronic signature will help you understand how to secure these HR acts from the formalisation of the initial contract.

Trial Period and Dematerialisation: Securing Each Stage

The dematerialised management of the trial period represents a major lever for performance and compliance for companies. From the delivery of the initial contract to the notification of termination or confirmation of permanent appointment, each stage can — and should — be covered by a secure electronic act.

Formalisation of the Initial Contract and Trial Clause

The trial period clause must appear expressly in the employment contract signed by both parties. A contract signed electronically via a solution compliant with the eIDAS Regulation has probative value equivalent to a written manuscript (Article 1366 of the Civil Code). Advanced electronic signature — at a minimum — is recommended for employment contracts, with identification of the signatory and formalised consent. For senior managers and sensitive positions, qualified electronic signature offers the highest level of legal certainty.

Consulting the comparison of electronic signature solutions makes it possible to identify the solution best suited to your organisation's volumes and requirements.

Management of Amendments and Termination Notices

Amendments for renewal of trial period, termination notifications and confirmations of permanent appointment are all HR acts that benefit from secure dematerialisation. The traceability provided by solutions such as Certyneo — with qualified time stamping, detailed audit trail and archiving with probative value — meets evidentiary requirements in the event of employment tribunal disputes. For HR departments managing large volumes, the dedicated ROI calculator allows you to estimate the time savings and cost reductions achieved by dematerialising these processes.

Legal Framework Applicable to the Trial Period

The trial period is governed by a set of legal and contractual provisions that define its terms, limits and the obligations of the parties.

Labour Code — Articles L. 1221-19 to L. 1221-26: These articles form the legal basis for the trial period in CDI. They set the initial maximum durations by professional category, the conditions for renewal (extended sectoral agreement + express agreement of the employee), and the mandatory notice periods in the event of termination. Any breach of the legal durations is sanctioned by reclassification of the trial period as a permanent contract.

Labour Code — Articles L. 1242-10 and L. 1251-14: These articles specifically govern the trial period in CDDs and temporary work contracts, with the principle of proportionality to contract duration.

Law No. 2008-596 of 25 June 2008 on the modernisation of the labour market: This law fundamentally reformed the trial period, notably by introducing standardised maximum durations and mandatory notice periods.

Civil Code — Article 1366: This article recognises the legal value of electronic writing: "A written instrument in electronic form is admissible as evidence to the same extent as a written instrument on paper, provided that the person from whom it emanates can be duly identified and that it has been drawn up and preserved in such a manner as to guarantee its integrity." This provision is fundamental to the validity of employment contracts and amendments signed electronically.

Civil Code — Article 1367: It defines electronic signature and clarifies that qualified signature creates an irrebuttable presumption of reliability, whereas advanced signature remains subject to judicial assessment.

eIDAS Regulation No. 910/2014 (EU) — applicable in French law by the primacy of European law: This Regulation defines three levels of electronic signature (simple, advanced, qualified) and their probative value in the European area. Qualified electronic signature is equivalent to handwritten signature in all Member States.

GDPR No. 2016/679: The data collected during electronic signature (identification data, traceability metadata) constitute personal data. Their processing must comply with the principles of minimisation, purpose and security. Audit trails generated must be subject to a defined and documented retention policy.

Case Law of the Court of Cassation: The Social Chamber of the Court of Cassation has regularly recalled that renewal of the trial period without the employee's express agreement is void, and that discriminatory termination during the trial period engages the employer's liability even in the absence of an obligation to provide reasons (Cass. soc., consistent rulings since 2010).

Legal Risks: The lack of written formalisation of the trial period, exceeding legal durations, or non-compliance with notice periods exposes the employer to employment tribunal convictions that can amount to several months' salary in damages, independent of the legally required compensation payments.

Usage Scenarios: Trial Period and Electronic Signature

The dematerialisation of trial period management applies to a wide variety of contexts. Here are three representative scenarios that illustrate the concrete benefits of a structured and electronically secure approach.

Scenario 1: An SME in Digital Services with Strong Growth

An SME in the digital services sector with approximately 80 employees carries out an average of 30 recruits per year, with 40% concerning senior manager profiles with a 4-month renewable trial period. Before dematerialisation, the HR department managed trial period renewals by registered mail, with return times sometimes exceeding 10 days and several follow-ups necessary. After implementing an advanced electronic signature solution, the time for formalising renewal amendments fell from 8-10 days to less than 48 hours. The risk of tacit renewal not formalised — and therefore legally void — has been eliminated. The time-stamped audit trail now constitutes solid evidence in the event of employment tribunal dispute. The estimated time saving for the HR department is of the order of 2 days/person per month on trial period management alone.

Scenario 2: A Distribution Group Managing Seasonal CDD Recruitment

An intermediate-sized distribution group employing approximately 600 people carries out between 200 and 300 seasonal CDD recruits each year, mainly for periods of 3 to 6 months. Paper management of contracts and proportional trial period clauses generated frequent calculation errors and signing delays reaching sometimes 5 to 7 days, delaying the employee's actual start date. After integration of an electronic signature solution with automated contract generator, errors in calculating trial period duration decreased by more than 90%, and the average signature time fell to less than 4 hours. The conformity of contractual clauses is assured by templates validated by the internal legal department, updated with each regulatory change.

Scenario 3: A Strategy Consulting Firm Recruiting Senior Consultants

An independent consulting firm with approximately twenty consultants regularly recruits senior profiles in CDI, with renewable 4-month trial periods. The international dimension of some recruits (candidates based abroad when signing) made manual management particularly cumbersome. The implementation of qualified electronic signature compliant with eIDAS made it possible to sign contracts with candidates located in other European countries without postal delays or travel. The probative value of qualified signature, recognised throughout the EU Member States, secures contracts concluded remotely. The firm estimates it has reduced the administrative time devoted to formalising employment contracts and their amendments by 60%.

Conclusion

The trial period is a precise legal mechanism whose rules — maximum durations, renewal conditions and notice periods in the event of termination — must be scrupulously observed to avoid any employment tribunal risk. In 2026, the dematerialisation of HR documents is the most effective response to the requirements for traceability, speed and compliance that these procedures impose.

Whether it is formalising an initial contract with a trial clause, obtaining the employee's express agreement for renewal, or notifying termination, each stage gains from being secured by electronic signature compliant with the eIDAS Regulation. Certyneo offers you a complete, intuitive and compliant solution to transform your HR processes.

Ready to secure your employment contracts? Discover Certyneo pricing and start dematerialising your HR processes in full compliance today.