Trial Period: Legal Duration and Termination

The trial period is an essential phase of the employment relationship: it allows the employer to assess the employee's skills, and the employee to verify that the position meets their expectations. Yet the rules governing it are often misunderstood or poorly applied. Maximum duration, renewal conditions, notice periods in case of termination — every detail matters to avoid reclassification or labor court disputes. This article reviews the current legal framework, nuances depending on the type of contract, and best practices to adopt, particularly when recruitment document management is dematerialized via electronic signature in business.

What is the trial period and what is it for?

Legal definition and objectives

Under article L.1221-20 of the Labor Code, the trial period allows the employer to assess the employee's competence in their work, in particular with regard to their experience, and allows the employee to assess whether the functions performed are suitable for them. It is not automatic: to be valid, it must be expressly stipulated in the offer letter or employment contract. The absence of written mention deprives the employer of any ability to rely on it.

The trial period applies to both permanent contracts (CDI) and fixed-term contracts (CDD), but its rules differ significantly depending on the type of contract. It is also provided for apprenticeship contracts and certain professional development contracts, with specific arrangements.

Optional nature and express stipulation

Contrary to popular belief, the trial period is not a legal automatic feature: it results from an agreement between the parties, formalized in writing. The case law of the Court of Cassation is consistent on this point: a trial period not mentioned in the contract is deemed non-existent, even if a collective agreement provides for it (Cass. soc., July 10, 2013, no. 12-16.659). The employment contract must therefore specify its duration and, if applicable, the conditions for its renewal.

Legal duration of the trial period depending on the type of contract

Maximum durations for permanent contracts (CDI)

For indefinite-term contracts, article L.1221-21 of the Labor Code sets maximum durations depending on the professional category:

• Workers and employees: 2 months

• Supervisory agents and technicians: 3 months

• Managers: 4 months

These durations may be reduced by collective agreement or by the contract itself, but cannot be extended beyond the legal thresholds, except for collective provisions prior to the law of June 25, 2008 and more favorable to employees.

Important: if a collective agreement provides for a shorter trial period, that duration applies, in accordance with the favor principle.

Maximum durations for fixed-term contracts (CDD)

For fixed-term contracts, article L.1242-10 of the Labor Code provides for a trial period calculated at the rate of one day per week, up to a maximum of:

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

• 1 month for CDDs with a duration of more than 6 months

Again, the applicable collective agreement may provide for different durations, provided they are more favorable to the employee.

Special case: renewal of the trial period

The renewal of the trial period is only possible under three cumulative conditions:

• The possibility of renewal must be expressly provided by a sector-wide extended agreement;

• Renewal must be provided for in the initial employment contract;

• The employee must give express consent at the time of renewal — tacit or presumed consent is insufficient.

The total duration (initial period + renewal) cannot exceed the following thresholds: 4 months for workers/employees, 6 months for supervisory agents and technicians, 8 months for managers. These limits are of absolute public order: any contractual or collective clause exceeding them is void ab initio.

Rules for terminating the trial period

Termination at the employer's initiative

The employer may end the trial period without having to invoke or justify any particular reason — this is one of the fundamental attributes of the trial. However, the termination must not be abusive or discriminatory (art. L.1132-1 of the Labor Code). The Court of Cassation has thus penalized terminations based on pregnancy status, union membership or the employee's disability.

The employer must comply with a notice period whose duration varies depending on the employee's length of service in the company (art. L.1221-25):

• Less than 8 days of service: 24 hours

• Between 8 days and 1 month: 48 hours

• Between 1 and 3 months: 2 weeks

• More than 3 months: 1 month

Failure to comply with this period entitles the employee to compensation equal to the salaries and benefits they would have received during the unserved notice period.

Termination at the employee's initiative

The employee enjoys a symmetrical freedom: they may terminate the trial period whenever they wish, without justification. They must nevertheless comply with a notice period of 24 hours (if less than 8 days of service) or 48 hours beyond that. These periods are identical whether it is a permanent contract (CDI) or fixed-term contract (CDD).

Pitfalls to avoid: nullity, abuse and reclassification

Several situations can weaken the termination or lead to its reclassification as dismissal without real and serious cause:

• Termination after expiration of the trial period: if the employer allows the employee to work beyond the deadline without terminating or confirming, the employment relationship is established and only a dismissal procedure is possible.

• Non-compliance with the notice period: the termination remains valid but exposes the employer to compensation.

• Discriminatory reason: the termination may be annulled and entitle the employee to damages.

• Absence of written mention: as previously noted, a trial period not stipulated is null.

For HR teams, dematerialization of employment contracts via electronic signature for HR makes it possible to secure the date of signature, preserve time-stamped evidence and ensure that all clauses — including the trial period — have been accepted by the employee before taking office.

Document management and dematerialization of recruitment contracts

Probative value of electronically signed contracts

Since the transposition of the eIDAS regulation into French law, an employment contract signed electronically has the same legal value as a paper contract, provided that the signature complies with the requirements of article 1366 of the Civil Code. For a permanent contract (CDI) or fixed-term contract (CDD) with a trial period, a simple electronic signature is sufficient in most cases; advanced or qualified signature is recommended for high-stakes positions or collective agreements requiring enhanced formalities.

The complete guide to electronic signature details the signature levels applicable depending on the types of HR documents.

Time-stamping and proof of acceptance of the trial period

One of the most frequent disputes regarding trial periods concerns precisely the date of signature of the contract: an employee may claim to have signed after taking office, making the trial clause inapplicable (case law considers that the trial period must be stipulated before or at the latest at the time of taking office). A time-stamped electronic signature system definitively resolves this problem by producing irrefutable evidence of the exact date and time of signature.

Legal archiving and retention period

Employment contracts must be retained for the entire duration of the contractual relationship and at least 5 years after termination of the contract, under the statute of limitations for common law salary claims (art. L.3245-1 of the Labor Code). Electronic signature platforms that comply with regulations offer archiving with probative value that simplifies this obligation. To compare available solutions, the comparison of electronic signature solutions provides a structured overview.

Legal framework applicable to the trial period

The trial period is mainly governed by articles L.1221-19 to L.1221-26 of the Labor Code, derived from law no. 2008-596 of June 25, 2008 modernizing the labor market. These provisions established a unified legal framework, ending the disparity of previous collective regimes.

Main reference texts:

• Art. L.1221-20: definition and purpose of the trial period

• Art. L.1221-21: maximum durations depending on professional category (permanent contracts)

• Art. L.1221-22: applicable collective provisions

• Art. L.1221-23: renewal conditions

• Art. L.1221-24: fate of the trial period in case of succession of contracts

• Art. L.1221-25: notice periods in case of termination by the employer

• Art. L.1221-26: notice periods in case of termination by the employee

• Art. L.1242-10: trial period in fixed-term contracts

• Art. L.3245-1: five-year prescription period for salary claims

Anti-discrimination provisions: Any termination of trial period based on a discriminatory reason is void ab initio under article L.1132-1 of the Labor Code, which prohibits any distinction based on origin, sex, pregnancy, union membership, disability or any other protected criterion. The burden of proof is adjusted: the employee must present facts suggesting discrimination, and it then falls to the employer to demonstrate that the termination is based on objective elements unrelated to any discrimination.

Electronic signature and probative value: When the employment contract is signed electronically, its legal value is ensured by articles 1366 and 1367 of the Civil Code, which establish the principle of equivalence between electronic and paper writing, provided that the signature makes it possible to identify its author and guarantees the integrity of the document. Regulation eIDAS no. 910/2014 of the European Parliament and of the Council, directly applicable in France, distinguishes three levels of signature (simple, advanced, qualified) and sets the conditions for mutual recognition between member states. The ETSI EN 319 132 standards specify the technical requirements applicable to advanced signatures in XAdES/PAdES format.

GDPR and personal data: The processing of the employee's personal data when electronically signing the contract is subject to Regulation (EU) 2016/679 (GDPR). The employer, as a data controller, must inform the employee of the purposes of processing, the duration of data retention and their rights (access, rectification, erasure). Electronic signature service providers act as subprocessors and must sign a data processing agreement (DPA) compliant with article 28 of the GDPR.

Concrete usage scenarios

Scenario 1: an industrial SME managing dozens of recruitments per year

An industrial SME employs around 150 employees and averages 40 recruitments per year, with a majority of workers and technicians on permanent contracts (CDI). Until 2024, contracts were sent by mail or handed over in person, which regularly generated delays of 3 to 5 days between the hiring decision and the actual signing of the contract. In several cases, employees had taken office before formally signing the contract, exposing the company to a risk of contesting the trial period clause.

By deploying an electronic signature solution for its employment contracts, the SME reduced this delay to less than 4 hours on average. Automatic time-stamping of each signature now guarantees that the contract — including the trial period — is signed before taking office. The rate of disputes related to the trial period dropped by 80% over the following two fiscal years, according to HR department estimates.

Scenario 2: a management consulting firm with high turnover of managers

A consulting firm with 60 employees, with a large majority of managers, regularly renews its team of consultants. Managers benefit from a 4-month trial period, renewable once under the applicable sector agreement, bringing the total duration to 8 months. Manual management of renewals — follow-up by email, collection of written consent, mail archiving — mobilized approximately 2 hours per file for the HR assistant.

Since adopting an electronic signature platform integrated into its HR management system (SIRH), the firm automatically sends the renewal amendment 15 days before the expiration of the initial period. The employee signs online, their consent is time-stamped, and the document is archived with probative value. Processing time per file has dropped to less than 20 minutes, a gain of approximately 90% on this administrative task.

Scenario 3: a group of healthcare facilities managing temporary replacement contracts

A hospital group of approximately 1,200 beds frequently recruits nurses and nursing assistants on temporary replacement contracts (CDDs), often for durations of 1 to 3 months. For these contracts, the trial period is calculated at the rate of one day per week, representing very short durations (sometimes only 1 to 2 weeks). The window for terminating the trial period is therefore narrow, and the slightest delay in contract signing can make it quasi-inapplicable.

By dematerializing replacement contracts via a solution compliant with eIDAS, the group ensures that each employee receives and signs their contract before the first day of service — including in urgent replacements decided over the weekend. The average signing time has fallen from 2 days to less than 45 minutes. This document reliability has secured the management of trial period terminations and reduced the risk of disputes before the labor court.

Conclusion

The trial period is a valuable legal tool for securing the beginning of an employment relationship, but its effectiveness depends entirely on compliance with formal rules: express stipulation in the contract, legal and collective durations, notice periods in case of termination. The slightest irregularity — contract signed after taking office, renewal without express consent, termination motivated by a discriminatory criterion — can expose the employer to reclassification or significant labor court awards.

Dematerialization of recruitment contracts via electronic signature is today the most robust response to these challenges: it guarantees time-stamping of the signature, secures proof of acceptance of the trial clause and facilitates legal archiving of documents. Certyneo supports you in bringing your HR processes into compliance. Discover our offers and start your free trial on Certyneo.