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. Yet its rules — maximum duration, renewal conditions, notice periods in case 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 step of contract 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 Labor Code, in Articles L. 1221-19 to L. 1221-26, sets mandatory ceilings that employers cannot exceed, even with the employee's agreement.

Permanent Contract (CDI): maximum durations by category

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

• Workers and employees: 2 months

• Supervisors and technicians: 3 months

• Managers: 4 months

These durations may be reduced by collective agreement or industry agreement, but in no case may they 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 stipulated in the employment contract or engagement letter to be binding on the employee.

Fixed-Term Contract (CDD): a trial period proportional to contract duration

For fixed-term 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 CDD contracts lasting six months or less

• 1 month for CDD contracts longer than 6 months

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

Special cases: apprenticeship contracts, temporary staffing and work-study programs

Apprenticeship contracts do not include 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 assignment contracts (interim staffing), the trial period is calculated at the rate of one day per week, limited to 2 days for assignments shorter than 1 month, and 3 days beyond that. These nuances are essential for HR departments managing many contractual profiles simultaneously.

Renewal of the trial period: strict conditions

The law permits renewal of the trial period, but only under carefully defined conditions. Only one renewal is possible, and only when expressly provided for in an extended collective agreement. The employer's sole will or an individual agreement is insufficient.

Cumulative conditions for renewal

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

• An extended collective agreement must expressly authorize renewal for the professional category concerned.

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

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

In case of valid renewal, the total durations (initial period + renewal) may not exceed: 4 months for workers and employees, 6 months for supervisors 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. Mere verbal exchange does not constitute sufficient proof in case of dispute. This is precisely the context in which the digitalization of HR acts becomes fully relevant. Using eIDAS-compliant electronic signature to formalize the renewal amendment guarantees traceability, timestamping and document integrity. The Certyneo solution allows you to obtain this agreement in a few minutes, with 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. However, this freedom is regulated by mandatory notice periods established by the law of June 25, 2008 on modernization of the labor market.

Notice periods for which the employer is responsible

When it is the employer who terminates the trial period, they must respect a notice period calculated based on the employee's length of service in the company:

• Less than 8 days of service: 24 hours

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

• Between 1 and 3 months of service: 2 weeks

• Beyond 3 months of service: 1 month

If the employer does not comply with this period, they must pay the employee compensation equal to the salary corresponding to the duration of the unobserved notice period. This indemnity is due even if termination occurs during the trial period and not after.

Notice periods for which the employee is responsible

When it is the employee who terminates the trial period, they must observe a notice period of:

• 24 hours if their length of service in the company is less than 8 days

• 48 hours beyond 8 days of service

These periods are mandatory and apply even in the absence of contractual stipulation.

Wrongful termination: limits to termination freedom

Although the trial period allows free termination in principle, this freedom has important case law limits. Termination is considered wrongful — and therefore likely to give rise to damages — in several cases: termination motivated by discriminatory grounds (pregnancy, health status, origin, etc.), termination occurring in circumstances suggesting misuse of the trial period (for example, systematic use of trial periods for one-off work without permanent hiring), or termination notified in an abrupt manner without following usual forms.

It is therefore strongly recommended to formalize the termination notification in writing, via a timestamped and traceable document. A comprehensive guide to electronic signature will help you understand how to secure these HR acts from the initial contract formalization.

Trial period and digitalization: securing each step

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

Formalization of initial contract and trial clause

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

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

Management of amendments and termination notifications

Amendments renewing the trial period, termination notifications and confirmations of permanent employment are all HR acts that benefit from secure digitalization. The traceability offered by solutions like Certyneo — with qualified timestamping, detailed audit trail and archiving with probative value — meets evidentiary requirements in case of employment tribunal disputes. For HR departments managing large volumes, the dedicated ROI calculator makes it possible to estimate the time savings and cost reductions achieved by digitalization of these processes.

Legal framework applicable to the trial period

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

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

Labor Code — Articles L. 1242-10 and L. 1251-14: These articles specifically govern the trial period in CDD and temporary assignment contracts (interim staffing), with the principle of proportionality to contract duration.

Law No. 2008-596 of June 25, 2008 on modernization of the labor market: This law profoundly reformed the trial period, notably by introducing standardized maximum durations and mandatory notice periods.

Civil Code — Article 1366: This article recognizes the legal value of electronic writing: "A document in electronic form is admissible as evidence on an equal footing with a document on paper, provided that the person from whom it emanates can be duly identified and that it is established and retained in conditions such 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 specifies that qualified signature creates an irrebuttable presumption of reliability, whereas advanced signature remains subject to judicial appraisal.

eIDAS Regulation No. 910/2014 (EU) — applicable in French law by 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 minimization, 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 reminded that renewal of the trial period without the express agreement of the employee is null, and that discriminatory termination during the trial period engages the employer's liability even in the absence of obligation to provide reasons (Cass. soc., consistent rulings since 2010).

Legal risks: Lack of written formalization of the trial period, exceeding legal durations, or non-compliance with notice periods expose the employer to employment tribunal convictions that can reach several months of salary in damages, independent of legally owed compensation.

Use scenarios: trial period and electronic signature

Digitalization of trial period management applies to widely varying contexts. Here are three representative scenarios that illustrate the concrete benefits of a structured and electronically secure approach.

Scenario 1: a small digital services company with strong growth

A small company in the digital services sector with about 80 employees makes an average of 30 recruits per year, of which 40% concern manager profiles with a renewable trial period of 4 months. Before digitalization, 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 formalization time for renewal amendments fell from 8-10 days to less than 48 hours. The risk of tacit renewal not formalized — and therefore legally null — has been eliminated. The timestamped audit trail now constitutes solid evidence in case of employment tribunal dispute. The estimated time savings by the HR department is around 2 person-days per month for trial period management alone.

Scenario 2: a distribution group managing seasonal CDD recruitment

A mid-sized distribution group employing about 600 people recruits between 200 and 300 seasonal CDD workers each year, mainly for durations of 3 to 6 months. Paper management of contracts and proportional trial period clauses generated frequent duration calculation errors and signing delays sometimes reaching 5 to 7 days, delaying actual start date. After integration of an electronic signature solution with automated contract generator, trial period duration calculation errors decreased by more than 90%, and average signing time fell to less than 4 hours. Compliance with contractual clauses is ensured by templates validated by internal legal services, updated with each regulatory change.

Scenario 3: a management consulting firm recruiting senior consultants

An independent consulting firm with about twenty consultants regularly recruits senior profiles in CDI contracts, with renewable trial periods of 4 months. The international dimension of some recruitments (candidates based abroad at signing) made handwritten management particularly cumbersome. Implementation of eIDAS-compliant qualified electronic signature enabled signing contracts with candidates located in other European countries without postal delays or travel. The probative value of qualified signature, recognized throughout all EU member states, secures contracts concluded remotely. The firm estimates it has reduced by 60% the administrative time devoted to formalizing employment contracts and their amendments.

Conclusion

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

Whether it is a matter of formalizing an initial contract with a trial clause, obtaining the employee's express agreement for renewal, or notifying termination, each step benefits from being secured by an 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 begin today to digitalize your HR processes in full compliance.