Trial Period: Legal Duration and Termination

Introduction

The trial period is one of the contractual clauses most poorly understood by both employers and employees. However, its rules are strictly regulated by the Labour Code: maximum duration according to professional category, conditions for renewal, notice periods to be observed when ending the trial period. An error in the drafting of a contract or in the procedure for ending a trial period can be costly, both in terms of labour court proceedings and HR management. This article clarifies the legal durations applicable in 2026, the arrangements for renewal, the rules for termination, and how electronic signature for HR modernises and secures these contractual procedures.

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Legal Duration of Trial Period According to Professional Category

The maximum durations of the trial period in permanent contracts (CDI) are set by article L1221-19 of the Labour Code. They vary depending on the socioprofessional category of the employee.

CDI: Durations by Category

For a permanent employment contract, the maximum initial durations are as follows:

• Workers and employees: 2 months

• Supervisory staff and technicians: 3 months

• Executives: 4 months

These durations are legal ceilings. A collective agreement or sector-wide agreement may provide for shorter durations, but never longer than those set by law — except for collective agreement provisions prior to 26 June 2008 (date of the law modernising the labour market) which established longer durations, which then remain applicable.

Fixed-term contracts (CDD): A Proportional Logic

For fixed-term employment contracts, the trial period is proportional to the total duration of the contract. According to article L1242-10 of the Labour Code, it is calculated at the rate of one day per week of contract, limited to:

• 2 weeks for a CDD of 6 months or less

• 1 month for a CDD of more than 6 months

It is important to note that the trial period must be expressly stipulated in the employment contract. In the absence of an explicit contractual mention, no trial period can be imposed on the employee.

Temporary Work and Specific Contracts

For temporary employment contracts (agency work), the duration of the trial period is set at:

• 2 working days for a mission of less than 1 month

• 3 working days between 1 and 2 months

• 5 working days beyond 2 months

These rules apply regardless of the collective agreement of the user sector.

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Renewal of the Trial Period: Conditions and Limits

Renewal of the trial period is not automatic. It is subject to three cumulative conditions provided for by article L1221-21 of the Labour Code.

The Three Legal Conditions for Renewal

• A collective agreement or sector-wide agreement must expressly authorise it. In the absence of such a provision, renewal is impossible.

• Renewal must be expressly provided for in the employment contract. A mere oral mention is insufficient.

• The employee must give explicit consent before the end of the initial period. Tacit or presumed consent is insufficient.

In practice, the maximum duration of the trial period including renewal is:

• 4 months for workers and employees

• 6 months for supervisory staff and technicians

• 8 months for executives

These total durations constitute absolute limits: even a favourable collective agreement cannot exceed them.

Beware of Abusive Clauses

The Court of Cassation has repeatedly reminded that a clause extending the trial period beyond legal limits is null and void (notably Cass. soc., 23 January 2013, no. 11-23.428). An employer relying on such a clause to terminate the contract risks requalification as wrongful dismissal without real and serious cause.

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Termination of the Trial Period: Notice Periods and Formalities

Termination of the trial period is freely exercised in law: neither the employer nor the employee must provide reasons for their decision. However, it must comply with notice periods and certain formalities.

Notice Periods in CDI

Since the law of 25 June 2008, articles L1221-25 and L1221-26 of the Labour Code impose minimum periods according to the employee's length of service at the time of termination.

At the Employer's Initiative:

• Less than 8 days of employment: 24 hours

• Between 8 days and 1 month: 48 hours

• Between 1 and 3 months: 2 weeks

• Beyond 3 months: 1 month

At the Employee's Initiative:

• Less than 8 days of employment: 24 hours

• From 8 days onwards: 48 hours

Failure by the employer to observe these periods entitles the employee to compensatory compensation, without this calling into question the validity of the termination.

Formalities for Notification

Although the law does not impose any particular form for notifying the end of the trial period, prudence requires formalising the termination in writing. Electronic signature in the enterprise makes it possible to secure this notification: the date of sending is certified, consent is recorded, and the document is time-stamped in accordance with the eIDAS regulation.

The use of an eIDAS-compliant electronic signature tool ensures in particular that the employer can prove, in the event of a dispute, the exact date on which the notification was sent to the employee — a determining element for calculating notice periods.

Cases of Suspension: Illness, Work Accident

The trial period may be suspended in the event of the employee's absence (illness, paid leave, work accident). The Court of Cassation established this principle of suspension-extension in a ruling of 4 February 2015 (no. 13-28.229). The trial period resumes for the remaining duration after the absence, without exceeding the legal limits.

This rule is important: an employee whose trial period would have ended during sick leave cannot be terminated on this basis during his or her absence.

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Digitalisation of Employment Contracts and Trial Period

Paper-based management of employment contracts, amendments for renewal of trial periods and termination notifications is a major source of documentary risk. Postal delays, lost mail and difficulties in proving the date of receipt are regularly discussed in labour court disputes.

Evidential Value of Electronic Signature in Labour Law

Since ordinance no. 2017-1387 of 22 September 2017 and the case law flowing from it, the employment contract may validly be concluded and signed in electronic form. The advanced or qualified electronic signature within the meaning of the eIDAS regulation confers on the document an evidential value equivalent to that of a handwritten signature, provided that the procedure used guarantees the identification of the signatory and the integrity of the document.

Concrete Benefits for HR Teams

HR teams relying on a certified electronic signature solution generally observe a reduction of 60 to 80% in the time spent on administrative management of employment contracts (source: Markess / PAC sector reports, 2023-2024). Beyond the time saving, complete traceability of the signature process — who signed, when, from which device — constitutes solid evidence in the event of a dispute over the start or end date of the trial period.

The comparison of electronic signature solutions available on our site helps you evaluate the essential technical and legal criteria for this type of HR use.

Integration with SIRH Tools

Modern solutions like Certyneo integrate with the main SIRH solutions on the market (Workday, SAP SuccessFactors, Lucca, Silae) via REST API. This interconnection makes it possible to automatically trigger the sending of the contract for signature as soon as a recruitment is validated in the SIRH, to monitor the status of signatures in real time, and to archive signed documents in an electronic safe deposit box compliant with the NF Z42-020 standard.

Legal Framework Applicable to the Trial Period

The trial period is principally governed by the Labour Code, articles L1221-19 to L1221-26 for CDIs, and L1242-10 for CDDs. These provisions were profoundly reformed by the law no. 2008-596 of 25 June 2008 on the modernisation of the labour market, which established uniform legal durations and mandatory notice periods.

Reference Texts:

• Article L1221-19 of the Labour Code: maximum initial durations of the trial period in CDI according to professional category

• Article L1221-21 of the Labour Code: cumulative conditions for renewal (collective agreement, contractual stipulation, employee consent)

• Articles L1221-25 and L1221-26 of the Labour Code: notice periods applicable to termination of the trial period at the initiative of the employer or employee

• Article L1242-10 of the Labour Code: duration of the trial period in the case of a CDD

On the Legal Value of Electronic Contracts and Digital Notification:

• eIDAS Regulation no. 910/2014 (EU): establishes the levels of electronic signature (simple, advanced, qualified) and their cross-border evidential value

• Articles 1366 and 1367 of the Civil Code: establish the principle of equivalence between electronic and paper writing, provided that the procedure guarantees the identity of the signatory and the integrity of the document

• Ordinance no. 2017-1387 of 22 September 2017: enables the use of electronic signature for employment contracts

• GDPR no. 2016/679: applies to the processing of personal data of signatories (name, email, biometric data if applicable) as part of the electronic signature process

• ETSI EN 319 132 Standard: technical specification relating to advanced electronic signature formats XAdES, applicable to contractual documents

Legal Risks:

An excessive trial period or non-compliant renewal exposes the employer to requalification as wrongful dismissal without real and serious cause (Cass. soc., 23 January 2013). Failure to comply with notice periods generates compensatory compensation due as of right. Lack of written proof of termination notification can lead to contestation of the termination date, with consequences for the calculation of compensation and notice period. Using a certified electronic signature solution makes it possible to constitute time-stamped and tamper-proof evidence, enforceable before labour courts.

Usage Scenarios

Scenario 1 — An IT Services SME Managing Multiple Simultaneous Hires

An SME with around fifty employees in the IT services sector recruits on average 15 to 20 collaborators per year, including a significant proportion of executives. Paper-based management of employment contracts led to frequent delays: contracts sent by post, signature return delays of 5 to 10 working days, risk of document loss. By switching to an advanced electronic signature solution compliant with eIDAS, the SME reduced the average time for signing employment contracts to less than 24 hours. The trial period start date is now certified with a time stamp accurate to the minute, which eliminates any potential dispute over the calculation of legal deadlines. The time savings on administration estimated by the HR team is around 70% on this specific task, equivalent to 3 to 4 days of work saved per month.

Scenario 2 — A Recruitment Intermediary Cabinet Managing CDD and Temporary Contracts

A firm specialising in recruitment and temporary staffing management, handling approximately 400 CDD contracts per year in the logistics and distribution sectors, faced a recurring problem: notice periods for trial period termination were difficult to document. In the event of a dispute, the user employer struggled to prove the exact date on which notification was delivered to the employee. After deploying a certified electronic signature solution with certified notification, the firm was able to constitute a complete evidentiary file for each trial period termination: date of sending, date of message opening, identity of recipient. Over 18 months, no labour court dispute relating to contestation of the notification date was recorded, compared to 3 to 4 cases per year previously.

Scenario 3 — An Associated Group in the Medical-Social Sector with High Staff Turnover

An associated group in the medical-social sector employing approximately 300 full-time equivalents manages high turnover and numerous hires in permanent and short-term contracts. The multiplicity of applicable collective agreements (CCN 66, CCN 51) complicates verification of maximum trial period durations. By integrating a contract generator parameterised according to the collective agreement and the status of the employee, combined with an electronic signature solution, the group automated the verification of legal durations at the time of contract drafting. Configuration errors — such as a 3-month trial period inserted for an employee under a convention limiting duration to 2 months — were reduced to zero in less than 6 months of use.

Conclusion

The trial period is a precise legal mechanism in which each parameter — initial duration, renewal conditions, notice periods — is strictly regulated by the Labour Code and social case law. Improper application of these rules exposes the employer to real and costly labour court risks. The digitalisation of employment contracts via electronic signature is today the best lever for securing these procedures: proof of date, traceability, eIDAS compliance and reliable archiving.

Certyneo allows you to manage the entire contractual life cycle of your employees, from the signing of the employment contract to the notification of the end of the trial period, with guaranteed legal compliance. Discover our pricing and launch your free trial on Certyneo to transform your HR management today.