Indefinite and Fixed-Term Contracts: Legal and Practical Differences

Introduction

In French labour law, the distinction between the indefinite-term contract (CDI) and the fixed-term contract (CDD) structures all employment relationships. Yet these two contractual forms remain often poorly understood by employers and HR departments, exposing the company to significant legal risks. Whether you manage a small business, 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 type of contract.

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 contains no 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.

A CDI may be concluded without particular formalities — it may even be oral for full-time work — but best 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 evidential 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 the company's activity

• Seasonal or customary employment as defined by decree or industry agreement

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

Any CDD concluded outside these legal cases is requalifiable as a CDI by the employment tribunal, exposing the employer to payment of a requalification indemnity equal to at least one month's salary (art. L1245-2 French Labour Code).

Duration and Term of CDD

The CDD may have a fixed term (end date set at signature) or an indefinite term (end linked to the occurrence of an event — return of the replaced employee, end of season). The maximum duration varies according to the reason for use:

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

• Seasonal or customary contracts: duration defined by the industry agreement

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

Formal Obligations: Drafting, Mandatory Provisions and Signature

Mandatory Provisions of CDD

Unlike the CDI, the CDD must obligatorily be in writing and transmitted to the employee within two working days following their hiring (art. L1242-12 French Labour Code). The absence of a written document automatically results in requalification as a CDI. The contract must state:

• The precise reason for recourse to a CDD

• The job title and required qualification

• The term or minimum duration

• Remuneration and its components

• Any trial period

• The 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 civil law provisions on digital evidence, electronic signature is fully valid for employment contracts. A solution compliant with the eIDAS regulation guarantees signer identification, document integrity and evidential value before courts. For remote contracts or in a widespread teleworking context, 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

CDI Termination: Framed Freedom

Termination of a CDI may occur in several ways:

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

• Dismissal: at the employer's initiative, requiring a real and serious reason (personal or economic), a formalised procedure and legal or contractual indemnities

• Mutual termination: by common agreement, approved by DREETS, giving entitlement to unemployment allowance (art. L1237-11 to L1237-16 French Labour Code)

• Judicial termination and acceptance of termination: contentious mechanisms

Since the 2016 Labour Act and the 2017 Macron ordinances, the Macron scale caps employment tribunal indemnities for dismissal without real and serious reason, with a floor and ceiling indexed to seniority (art. L1235-3 French Labour Code).

CDD Termination: A Principle of Non-Termination Before End Date

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

• Mutual agreement of both parties

• Serious or gross misconduct by the employee

• Force majeure

• Unfitness established by the occupational health physician

• Hiring on a CDI by another employer (at the employee's initiative only)

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

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

Practical Management and Dematerialisation of Contractual Flows

Managing CDD Deadline Tracking

One of the operational difficulties of the CDD is deadline management. An organisation of 50 employees regularly integrating seasonal CDDs or replacements may manage several dozen contracts simultaneously. Without dedicated tools, the risk of exceeding the term without formalisation is high, resulting in automatic requalification as a CDI.

SaaS contract management solutions allow centralising 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 producing compliant templates in minutes.

The Trial Period: Rules Applicable to Each Contract

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

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

• Workers and employees: 2 months

• Technicians and supervisory staff: 3 months

• Managers: 4 months

• Renewable once if expressly provided for by industry agreement

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

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

• CDD > 6 months: 1 month maximum

If the CDD is requalified as a CDI, the trial period already served in the CDD counts towards that of the CDI.

Archiving and GDPR Compliance of Employment Contracts

Employment contracts contain sensitive personal data (bank details, address, remuneration). The complete guide to electronic signature reminds us that the processing chain — from creation to archiving — 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 French Labour Code), potentially extended to 30 years for exposure to specific occupational hazards. A comparison of electronic signature solutions helps identify tools offering integrated archiving with probative value, essential for responding to any evidence request.

Legal Framework Applicable to Employment Contracts in France

French 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: permitted cases for CDD use

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

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

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

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

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

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

Legal Value of Electronic Signature on Employment Contracts

Since the transposition of European directive 1999/93/CE, confirmed by the eIDAS regulation n°910/2014/EU of 23 July 2014, electronic signature has equivalent legal value to handwritten signature provided it meets technical and identification requirements. The Civil Code, in articles 1366 (electronic document) and 1367 (electronic signature), enshrines this equivalence in French law.

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

Personal Data Protection: GDPR Obligations

Processing of data appearing in employment contracts is subject to the General Data Protection Regulation (GDPR) n°2016/679. The employer, as data controller, must:

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

• Limit data retention to necessary duration

• Ensure data storage security (art. 32 GDPR)

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

The CNIL has published specific recommendations on employee data management, reminding that the processing register must mention employment contract management as a distinct purpose.

Technical Standards Applicable to Electronic Signature

The ETSI EN 319 132 (XAdES), ETSI EN 319 122 (CAdES) and ETSI EN 319 142 (PAdES) standards define electronic signature formats compliant with eIDAS. For employment contracts, PAdES-B format (PDF signature) is most commonly used and recognised by 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 salaried staff on CDI, recruits between 40 and 60 additional salaried staff on CDD 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 deliveries or physical visits incompatible with quick 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. Automated deadline tracking eliminated cases of unintended requalification as CDI — a risk that had occurred twice in three years, each generating costly employment tribunal proceedings. Centralised archived contracts also facilitated URSSAF checks and HR audits.

Scenario 2 — An HR Transformation Consulting Firm

A consulting firm of about fifteen consultants, working exclusively on CDI, manages a significant volume of amendments and contract modifications (mobility clauses, variable remuneration reviews, added responsibilities). These amendments, though less formalised than the initial contract, have the same legal force and require both parties' signature.

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

Scenario 3 — A Home Care Network in Strong Growth

A home care network with around 300 employees (nurses, care assistants, administrative staff) combines full-time CDI, part-time CDI and continuous CDD replacement flows. Manual contract management generated recurring errors: missing mandatory CDD provisions, missed transmission deadlines, confusion between reasons for use.

Integration of a contract generator coupled with electronic signature standardised templates by contract type and legal reason. Each document automatically includes mandatory legal provisions. Operations managers, not legal professionals, can no longer create a CDD without selecting a valid legal reason from the tool. Result: zero contentious requalification over 18 months of use, versus an average of 3 to 4 cases annually previously.

Conclusion

The distinction between CDI and CDD goes beyond simple duration: it engages entirely different legal regimes regarding formalities, termination, indemnification and contentious risks. The CDI offers stability and regulated termination flexibility, whilst the CDD imposes strict formalities and a limitation of permissible use cases which, if not respected, expose the employer to costly requalifications.

In a context of HR process digitalisation, securing the signature and archiving of these contracts has become a compliance issue as much as an operational efficiency lever. Certyneo enables you to sign, track 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 on our pricing page or using our ROI calculator to measure your concrete gains.