Fixed-term and Indefinite-term Contracts: Legal and Practical Differences

Introduction

In French employment law, the distinction between the indefinite-term contract (CDI) and the fixed-term contract (CDD) structures the entire employment relationship. Yet these two contractual forms remain poorly understood by employers and HR departments, exposing the organisation 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 Labour Code, the normal and general form of employment relationship. It does not specify a term in advance. This absence of a fixed end date gives the CDI a presumption of employment stability, protected by the right to job security enshrined in the Preamble to the 1946 Constitution.

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

The CDD: An Exceptional Contract Subject to Strict Conditions

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

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

• Temporary increase in business activity of the company

• Seasonal employment or customary employment defined by decree or collective 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 Labour Code).

Duration and Term of the CDD

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

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

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

Beyond the legal term without conversion to a CDI, the contract automatically continues as a CDI (art. L1243-11 Labour Code).

Formal Obligations: Drafting, Mandatory Provisions and Signature

Mandatory Provisions of the CDD

Unlike the CDI, the CDD must obligatorily be in writing and delivered to the employee within two working days following hiring (art. L1242-12 Labour Code). The absence of written form automatically triggers reclassification as a CDI. The contract must state:

• The precise reason for recourse to the CDD

• The job title and required qualifications

• The term or minimum duration

• Remuneration and its components

• Possible probationary period

• Applicable collective agreement

• Name and qualifications 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 proof, 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 remote contracts or in a context of widespread telework, dematerialising the conclusion of CDIs and CDDs via an electronic signature tool for business reduces onboarding times by 60 to 80% according to sector usage feedback.

Termination Regimes: Radically Different Rules

Termination of the CDI: Regulated Freedom

Termination of a CDI may occur in several ways:

• Resignation: at the employee's initiative, respecting conventional or legal notice period

• Dismissal: at the employer's initiative, requiring fair and genuine cause (personal or economic), formalised procedure and legal or conventional indemnities

• Negotiated termination: by mutual agreement, approved by the Regional Labour Authority, opening entitlement to unemployment benefit (art. L1237-11 to L1237-16 Labour Code)

• Judicial termination and taking effect: contentious mechanisms

Since the 2016 Labour Act and the 2017 Macron Ordinances, the Macron scale limits tribunal indemnities for unfair dismissal, with a floor and ceiling indexed to length of service (art. L1235-3 Labour Code).

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

Early termination of a CDD before its end date is strictly regulated and may only occur in the following cases (art. L1243-1 Labour Code):

• Mutual agreement of both parties

• Serious or gross misconduct of the employee

• Force majeure

• Unfitness established by the occupational health physician

• Recruitment as a CDI by another employer (at employee's initiative only)

Any early termination outside these cases exposes the employer to payment of remuneration owed until the contract term. 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 in cases of gross misconduct, agreement for reclassification as CDI or refusal of a proposed CDI), the employee receives a precarity indemnity equal to 10% of total gross remuneration received during the contract (art. L1243-8 Labour Code), reduced to 6% by extended collective agreement providing for training actions.

The CDI does not generate end-of-contract indemnity except on dismissal (legal indemnity from 8 months' service: 1/4 month per year up to 10 years, 1/3 thereafter — art. R1234-2 Labour Code) or negotiated termination.

Practical Management and Dematerialisation of Contractual Workflows

Organising CDD End-Date Monitoring

One of the operational difficulties of the CDD is managing end dates. An organisation of 50 employees regularly integrating seasonal CDD contracts or replacements may manage dozens of 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, AI-powered contract generation from Certyneo allows compliant templates to be produced in minutes.

Probationary Period: Rules Applicable to Each Contract

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

For the CDI (art. L1221-19 Labour Code):

• Workers and employees: 2 months

• Technicians and supervisory staff: 3 months

• Managers: 4 months

• Renewable once if collective agreement expressly provides

For the CDD (art. L1242-10 Labour Code):

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

• CDD > 6 months: maximum 1 month

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

Archival and GDPR Compliance for Employment Contracts

Employment contracts contain sensitive personal data (bank details, address, remuneration). The comprehensive guide to electronic signature recalls that the processing chain — from creation to archival — must comply with GDPR. The retention period for employment contracts is 5 years after contract termination regarding the employment tribunal limitation period (art. L1471-1 Labour Code), potentially extended to 30 years for exposure to specific occupational risks. A comparison of electronic signature solutions allows identification of tools offering integrated archival with probative value, essential for responding to any request for proof.

Legal Framework Applicable to Employment Contracts in France

Labour Code: Foundational Texts

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

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

• Art. L1242-1 to L1242-4: authorised cases for CDD use

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

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

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

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

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

• Art. L1237-11 to L1237-16: negotiated termination of CDI

Legal Value of Electronic Signature on Employment Contracts

Since transposition of EU 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 Civil Code, in Articles 1366 (electronic writing) and 1367 (electronic signature), enshrines this equivalence in French law.

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

Protection of Personal Data: GDPR Obligations

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

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

• Limit data retention to necessary duration

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

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

The French Data Protection Authority has published specific recommendations on management of employee data, recalling that the processing register must mention employment contract management as a distinct 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, PAdES-B format (PDF signature) is most commonly used and recognised before French courts.

Use Cases: 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 mailings or physical visits incompatible with rapid job starts.

By deploying an eIDAS-compliant electronic signature solution for its CDDs, this company reduced its average contracting time to less than 4 hours. Automatic deadline monitoring eliminated cases of involuntary reclassification as CDI — a risk that had occurred twice in three years, each generating costly employment tribunal proceedings. Centralised archived contracts also facilitated social security audits and HR reviews.

Scenario 2 — An HR Transformation Consulting Firm

A consulting firm of around fifteen consultants, operating exclusively in CDI, manages a large volume of amendments and contractual modifications (mobility clauses, variable pay reviews, addition of responsibilities). These amendments, though less formalised than the initial contract, have equal legal force and require signature of both parties.

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

Scenario 3 — A Home Care Network in Strong Growth

A home care network with around 300 employees (nurses, care workers, administrative staff) combines full-time CDI, part-time CDI and continuous replacement CDD. Manual contract management generated recurring errors: missing mandatory provisions on CDDs, delivery deadline not met, confusion between reasons for hiring.

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 legal specialists, cannot create a CDD without selecting a valid legal reason in the tool. Result: zero reclassification disputes over 18 months of use, compared to an average of 3 to 4 contentious files per year previously.

Conclusion

The distinction between CDI and CDD goes beyond the simple matter of duration: it engages entirely different legal regimes in terms of formalities, termination, indemnification and contentious risks. The CDI offers stability and regulated termination flexibility, whilst the CDD imposes strict formalities and limitation of hiring cases which, if not observed, expose the employer to costly reclassifications.

In a context of digitalisation of HR processes, securing the signature and archival of these contracts has become a compliance issue as much as an operational efficiency lever. Certyneo enables you to sign, monitor and archive your CDIs and CDDs in full eIDAS compliance, with automatic deadline 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 by using our ROI calculator to measure your concrete gains.