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 unknown or misapplied. Maximum duration, renewal conditions, notice periods in case of termination — every detail matters to avoid requalification or labor dispute litigation. This article reviews the applicable legal framework, nuances according to contract type, and best practices to adopt, particularly when recruitment documentation management is digitalized via electronic signature in business.

What is a trial period and what is its purpose?

Legal definition and objectives

Under article L.1221-20 of the Labor Code, the trial period allows the employer to assess the employee's skills in their work, particularly in light of their experience, and the employee to determine whether the duties suit 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 according to contract type. It also applies to apprenticeship contracts and certain professionalization contracts, with specific regimes.

Optional nature and express stipulation

Contrary to popular belief, the trial period is not a legal automatism: it results from an agreement between the parties, formalized in writing. The Cour de Cassation's case law is constant 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., 10 July 2013, no. 12-16.659). The employment contract must therefore specify its duration and, where applicable, the conditions for its renewal.

Legal duration of the trial period according to contract type

Maximum durations for permanent contracts (CDI)

For open-ended contracts, article L.1221-21 of the Labor Code sets maximum durations based on professional category:

• Manual and clerical workers: 2 months

• Supervisory staff and technicians: 3 months

• Executives: 4 months

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

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

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 duration of 6 months or less

• 1 month for CDDs with duration greater than 6 months

Again, the applicable collective agreement may provide for different durations, subject to being more favorable to the employee.

Special case: renewal of the trial period

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

• The possibility of renewal must be expressly provided for by an extended sectoral 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 manual and clerical workers, 6 months for supervisory staff and technicians, 8 months for executives. These limits are of absolute public policy: any contractual or collective clause exceeding them is void ab initio.

Rules governing trial period termination

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 Cour de Cassation has thus penalized terminations based on pregnancy status, union membership or the employee's disability.

The employer must respect a notice period whose duration varies according to the employee's length of service in the company (art. L.1221-25):

• Less than 8 days of employment: 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 gives entitlement to compensatory indemnity equal to the wages and benefits the employee would have received during the unserved notice period.

Termination at the employee's initiative

The employee benefits from symmetrical freedom: they may terminate the trial period at any time, without justification. They must nevertheless comply with a notice period of 24 hours (if less than 8 days of employment) or 48 hours thereafter. These periods are the same whether for a CDI or CDD.

Pitfalls to avoid: nullity, abuse and requalification

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

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

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

• Discriminatory reason: termination may be voided and give entitlement to damages.

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

For HR teams, digitalization of employment contracts via electronic signature for HR makes it possible to secure the signature date, maintain time-stamped proof and ensure that all clauses — including the trial period — have been properly accepted by the employee before starting work.

Documentary management and digitalization of recruitment contracts

Probative value of electronically signed contracts

Since transposition of the eIDAS Regulation into French law, an electronically signed employment contract has the same legal value as a paper contract, provided the signature complies with the requirements of article 1366 of the Civil Code. For a CDI or CDD featuring a trial period, simple electronic signature suffices in most cases; advanced or qualified signature is recommended for senior positions or where collective agreements impose enhanced formalities.

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

Time-stamping and proof of acceptance of trial period

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

Legal archiving and retention period

Employment contracts must be retained throughout the duration of the contractual relationship and for at least 5 years following termination of the contract, as per the statutory prescription period for wage claims (art. L.3245-1 of the Labor Code). Electronic signature platforms that comply 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 primarily governed by articles L.1221-19 to L.1221-26 of the Labor Code, stemming from law no. 2008-596 of 25 June 2008 on modernization of the labor market. These provisions established a unified legal framework, ending the disparity of previous collective regimes.

Principal reference texts:

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

• Art. L.1221-21: maximum durations according to professional category (CDI)

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

• Art. L.1221-23: renewal conditions

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

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

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

• Art. L.1242-10: trial period in CDD

• Art. L.3245-1: five-year prescription of wage claims

Anti-discrimination provisions: Any trial period termination 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 factual elements suggesting discrimination, after which it is for the employer to demonstrate that the termination is based on objective elements unrelated to any discrimination.

Electronic signature and probative value: Where the employment contract is electronically signed, its legal value is assured by articles 1366 and 1367 of the Civil Code, which establish the principle of equivalence between electronic and paper writing, provided the signature permits identification of its author and guarantees document integrity. Regulation (EU) 2014/910 (eIDAS) of the European Parliament and Council, directly applicable in France, distinguishes three signature levels (simple, advanced, qualified) and sets the technical conditions for mutual recognition between Member States. Standards ETSI EN 319 132 specify the technical requirements applicable to advanced signatures in XAdES/PAdES format.

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

Concrete usage scenarios

Scenario 1: an industrial SME managing several dozen hirings per year

An industrial SME with around 150 employees averages 40 hirings per year, the majority of which are manual workers and technicians on permanent contracts. Until 2024, contracts were transmitted by mail or handed over in person, which regularly created delays of 3 to 5 days between the hiring decision and actual contract signature. In several cases, employees had started work before formally signing the contract, exposing the company to risk of disputing the trial period clause.

By deploying an electronic signature solution for recruitment 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 starting work. The rate of disputes related to the trial period fell by 80% over the following two fiscal years, according to HR department estimates.

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

A consulting firm with 60 collaborators, the majority of whom are executives, regularly renews its team of consultants. Executives benefit from a trial period of 4 months, renewable once under the applicable sectoral agreement, bringing total duration to 8 months. Manual management of renewals — email reminders, collection of written agreements, filing of documents — mobilized around 2 hours per file for the HR assistant.

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

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

A hospital group with approximately 1,200 beds frequently recruits nurses and nursing assistants on fixed-term replacement contracts, 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 any delay in contract signature can make it almost inopposable.

By digitalizing replacement contracts via an eIDAS-compliant solution, the group ensures that each employee receives and signs their contract before first starting work — including for replacements decided in emergency over the weekend. Average signature time dropped from 2 days to less than 45 minutes. This documentary reliability made it possible to secure management of trial period terminations and reduce risks 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 starting work, renewal without express consent, termination motivated by a discriminatory criterion — can expose the employer to requalification or significant labor court judgments.

Digitalization 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.