Indefinite and Fixed-Term Contracts: Legal and Practical Differences

Introduction

In French labour law, the distinction between the indefinite-term contract (Contrat à Durée Indéterminée, CDI) and the fixed-term contract (Contrat à Durée Déterminée, CDD) structures all employment relationships. Yet these two contractual forms remain poorly understood by employers and HR departments, exposing the company to significant legal risks. Whether you manage a micro-enterprise, SME or large organisation, understanding the differences between CDI and CDD is essential to secure your hiring, anticipate terminations and guarantee legal compliance. This article presents a comprehensive analysis: legal foundations, termination regimes, formal obligations and best practices for each contract type.

Definitions and Legal Foundations of CDI and CDD

The CDI: The Normal and General Form of Employment Contract

The indefinite-term contract is, according to Article L1221-2 of the French Labour Code, the normal and general form of employment relationship. It does not contain a fixed end date. This absence of a term confers on the CDI a presumption of employment stability, protected by the right to job security enshrined in the preamble to the 1946 Constitution.

The CDI may be concluded without particular formality — it may even be oral for full-time work — but practice strongly recommends a signed written document to secure the rights and obligations of both parties. In 2026, electronic signature for HR is becoming the standard method for concluding these contracts remotely whilst guaranteeing their probative value.

The CDD: An Exception Contract Subject to Strict Conditions

The fixed-term contract is governed mainly by Articles L1241-1 to L1248-11 of the French Labour Code. It constitutes an exception to the CDI and may only be concluded in cases strictly limited by law:

• Replacement of an absent employee (illness, maternity leave, etc.)

• Temporary increase in business activity of the company

• Seasonal employment or employment of customary nature defined by decree or sectoral agreement

• Specific contracts (apprenticeship contract, professional development contract, etc.)

Any CDD concluded outside these legal cases may be reclassified as a CDI by the employment tribunal, exposing the employer to payment of a reclassification indemnity equal to at least one month's salary (art. L1245-2 C. trav.).

Duration and Term of the CDD

The CDD may be for a fixed term (end date set at signing) or an indefinite term (end linked to the occurrence of an event — return of the replaced employee, end of season). The maximum duration varies depending on the reason for recourse:

• Replacement or increase in activity: 18 months maximum, including renewals (with two possible renewals)

• Seasonal or customary employment: duration defined by the sectoral agreement

Beyond the legal term without transformation into a CDI, the contract automatically continues as a CDI (art. L1243-11 C. trav.).

Formal Obligations: Drafting, Mandatory Provisions and Signature

Mandatory Provisions of the CDD

Unlike the CDI, the CDD must obligatorily be drawn up in writing and transmitted to the employee within two working days following hiring (art. L1242-12 C. trav.). The absence of a written document automatically results in reclassification as a CDI. The contract must mention:

• The precise reason for recourse to the CDD

• The designation of the position and required qualification

• The term or minimum duration

• Remuneration and its components

• Any trial period

• Applicable collective agreement

• The name and qualification of the replaced employee (if applicable)

Electronic Signature to Secure Employment Contracts

Since Ordinance No. 2017-1387 and the provisions of the Civil Code on digital evidence, electronic signature is fully valid for employment contracts. A solution compliant with the eIDAS regulation guarantees identification of the signatory, document integrity and probative value before the courts. For contracts concluded remotely or in a context of widespread telework, dematerialising the conclusion of CDIs and CDDs via an electronic signature tool in the enterprise reduces onboarding times by 60 to 80% according to sectoral usage feedback.

Termination Regimes: Radically Different Rules

Termination of the CDI: Regulated Freedom

Termination of a CDI may occur according to several methods:

• Resignation: at the employee's initiative, with respect for a conventional or statutory notice period

• Dismissal: at the employer's initiative, requiring a real and serious cause (personal or economic), a formalised procedure and statutory or conventional indemnities

• Amicable termination: by mutual agreement, approved by the regional employment authority, giving entitlement to unemployment benefits (art. L1237-11 to L1237-16 C. trav.)

• Judicial termination and acknowledgement of breach: contentious mechanisms

Since the 2016 Labour Act and the 2017 Macron ordinances, the Macron scale sets limits on employment tribunal indemnities for dismissal without real and serious cause, with a floor and ceiling indexed to seniority (art. L1235-3 C. trav.).

Termination of the CDD: A Principle of Non-Termination Before Expiry

Early termination of a CDD before expiry is strictly regulated and may only occur in the following cases (art. L1243-1 C. trav.):

• Mutual agreement of both parties

• Serious or gross misconduct by the employee

• Force majeure

• Unfitness established by the occupational health doctor

• Hire by another employer under a CDI (at the employee's initiative only)

Any early termination outside these cases exposes the employer to payment of remuneration due until the end of the contract. Conversely, if the employee terminates the CDD without valid reason, they must pay damages to the employer.

End-of-Contract Indemnities

At the end of a CDD (except gross misconduct, reclassification agreement as a CDI or refusal of a proposed CDI), the employee receives a severance indemnity equal to 10% of total gross remuneration received during the contract (art. L1243-8 C. trav.), reduced to 6% by extended sectoral agreement providing training activities.

The CDI does not generate an end-of-contract indemnity except in case of dismissal (statutory indemnity from 8 months' seniority: 1/4 month per year up to 10 years, 1/3 thereafter — art. R1234-2 C. trav.) or amicable termination.

Practical Management and Dematerialisation of Contractual Workflows

Managing CDD Expiry Dates

One of the operational difficulties of the CDD is managing expiry dates. An organisation of 50 employees regularly integrating seasonal CDDs or replacements may manage several dozen simultaneous contracts. Without a dedicated tool, the risk of exceeding the term without formalisation is high, resulting in automatic reclassification as a CDI.

SaaS contract management solutions allow centralisation of end dates, sending preventive alerts and automatically generating renewal proposals or non-renewal letters. To go further in standardisation, Certyneo's AI contract generator allows production of compliant templates in minutes.

Trial Period: Rules Applicable to Each Contract

The trial period is subject to different maximum durations depending on the contract type:

For the CDI (art. L1221-19 C. trav.):

• Manual workers and employees: 2 months

• Technicians and supervisory staff: 3 months

• Managers: 4 months

• Renewable once if a sectoral agreement expressly provides for it

For the CDD (art. L1242-10 C. trav.):

• CDD ≤ 6 months: 1 day per week worked, capped at 2 weeks

• CDD > 6 months: 1 month maximum

If the CDD is reclassified as a CDI, the trial period already served in the CDD is credited against that of the CDI.

Archiving and GDPR Compliance of Employment Contracts

Employment contracts contain sensitive personal data (bank details, address, remuneration). The comprehensive electronic signature guide reminds that the processing chain — from creation to archiving — must comply with the GDPR. Employment contracts must be retained for 5 years after contract termination in view of the employment tribunal limitation period (art. L1471-1 C. trav.), which may be extended to 30 years for exposures to specific occupational risks. A comparison of electronic signature solutions allows identification of tools offering integrated archiving with probative value, essential for responding to any request for proof.

Legal Framework Applicable to Employment Contracts in France

French Labour Code: Foundational Texts

The CDI/CDD distinction is governed by the French Labour Code, of which the central articles are:

• Art. L1221-2: the CDI as normal and general form of employment contract

• Art. L1242-1 to L1242-4: cases of authorised recourse to CDD

• Art. L1242-12: obligation of written form and mandatory provisions of the CDD

• Art. L1243-1: strictly limited cases of early CDD termination

• Art. L1243-8: CDD end indemnity (severance)

• Art. L1245-1 and L1245-2: reclassification of CDD to CDI and associated indemnity

• Art. L1235-3: employment tribunal indemnification scale (Macron scale)

• Art. L1237-11 to L1237-16: amicable CDI termination

Legal Value of Electronic Signature on Employment Contracts

Since the transposition of European Directive 1999/93/EC, confirmed by eIDAS Regulation No. 910/2014/EU of 23 July 2014, electronic signature has legal value equivalent to handwritten signature provided it satisfies technical and identification requirements. The French Civil Code, in its articles 1366 (electronic writing) and 1367 (electronic signature), enshrines this equivalence in French law.

For employment contracts, case law admits qualified electronic signature (QES level according to eIDAS) as irrefutable evidence. Advanced signature (AES) is sufficient in the majority of HR cases, provided the provider is listed on the eIDAS Trust List.

Personal Data Protection: GDPR Obligations

The processing of data contained in employment contracts is subject to the General Data Protection Regulation (GDPR) No. 2016/679. The employer, as data controller, must:

• Inform the employee of the processing of their data (art. 13 GDPR)

• Limit retention of data to the necessary duration

• Guarantee the security of stored data (art. 32 GDPR)

• Enable exercise of access, rectification and erasure rights (art. 15 to 17 GDPR)

The CNIL (French data protection authority) has published specific recommendations on managing employee data, reminding that the processing register must mention employment contract management as a separate purpose.

Technical Standards Applicable to Electronic Signature

The standards ETSI EN 319 132 (XAdES), ETSI EN 319 122 (CAdES) and ETSI EN 319 142 (PAdES) define electronic signature formats compliant with eIDAS. For employment contracts, the PAdES-B format (PDF signature) is most commonly used and recognised by French courts.

Use Scenarios: CDI, CDD and Electronic Signature in Practice

Scenario 1 — A Logistics Company Managing Seasonal Peaks

An SME specialising in e-commerce logistics, employing 80 permanent CDI employees, recruits between 40 and 60 additional CDD employees each year during periods of high activity (November-December and sales periods). Before dematerialisation, transmitting and signing contracts required 3 to 5 working days on average, involving postal sends or physical transfers incompatible with rapid job starts.

By deploying an eIDAS-compliant electronic signature solution for its CDDs, this company reduced its average contractualisation time to under 4 hours. Automatic expiry date tracking eliminated cases of involuntary CDI reclassification — a risk that had materialised twice in three years, each generating an expensive employment tribunal procedure. Centralisation of archived contracts also facilitated social contribution authority (URSSAF) checks and HR audits.

Scenario 2 — A Transformation HR Consulting Firm

A consulting firm of about fifteen consultants, working exclusively in CDI, manages a large volume of amendments and contractual modifications (mobility clauses, variable remuneration revisions, addition of responsibilities). These amendments, though less formalised than the initial contract, have the same legal force and require signature by both parties.

By integrating electronic signature into its HR workflow, the firm eliminated delays linked to registered mail sends and document returns. Each amendment is now signed in under 24 hours, with qualified timestamping and automatic archiving in the employee's digital file. The loss rate of contractual documents — which represented a real probative risk — has fallen to zero. Cost savings of around 15% on HR administrative costs were observed in the first year.

Scenario 3 — A Home Care Network in Rapid Growth

A home care network comprising approximately 300 employees (nurses, care assistants, administrative staff) combines full-time CDI, part-time CDI and CDD replacement contracts in continuous flow. Manual contract management generated recurring errors: missing mandatory provisions on CDDs, transmission deadlines not met, confusion between reasons for recourse.

Integration of a contract generator coupled with electronic signature standardised templates according to contract type and legal reason. Each document automatically incorporates mandatory legal provisions. Operational managers, not lawyers, cannot create a CDD without selecting a valid legal reason in the tool. Result: zero reclassification litigation over 18 months of use, compared to an average of 3 to 4 cases annually in previous years.

Conclusion

The distinction between CDI and CDD goes beyond the simple question of duration: it engages entirely different legal regimes regarding formality, termination, indemnification and litigation risks. The CDI offers stability and regulated termination flexibility, while the CDD imposes strict formality and limitation of recourse cases which, if not respected, expose the employer to costly reclassifications.

In a context of digitalisation of HR processes, securing the signature and archiving of these contracts has become an issue of compliance as much as a lever for operational efficiency. Certyneo allows you to sign, track and archive your CDIs and CDDs in full eIDAS compliance, with automatic expiry alerts and complete audit trail.

Discover how Certyneo can transform your contract management by testing our solution free of charge on our pricing page or using our ROI calculator to measure your concrete gains.