CDI vs CDD: Legal Differences, Duration and Rights 2026

Introduction

In France, the choice between a permanent employment contract (CDI) and a fixed-term contract (CDD) commits both the employer and the employee to distinct legal grounds. While the CDI remains the legal standard of reference under Article L1221-2 of the Labour Code, the CDD constitutes a strictly regulated exception. Being unaware of the differences — maximum duration, legal grounds, end-of-contract severance pay, probationary period — exposes both parties to significant litigation risks. This article reviews the legal and practical differences between CDI and CDD, the applicable limits in 2026, employee rights and HR best practices to secure every hire.

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Definitions and Fundamental Principles

The CDI: Standard Contract Under Common Law

The permanent employment contract is provided for by Article L1221-2 of the Labour Code, which states that "the employment contract is concluded without a fixed term." It does not involve a term set in advance and may be terminated at any time, subject to compliance with legal procedures (resignation, dismissal, mutually agreed termination approved by the DREETS). The CDI may be full-time or part-time (Art. L3123-1 et seq.).

In this respect, electronic signature for HR is now a key tool for digitalising the conclusion of CDIs whilst guaranteeing their evidentiary value.

The CDD: A Regulated Exception

The CDD is governed by Articles L1241-1 to L1248-11 of the Labour Code. It can only be concluded for the execution of a specific and temporary task, and only in cases exhaustively listed by law:

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

• Temporary increase in activity

• Seasonal employment

• Standard-use contracts in certain sectors (hotel and catering, entertainment, construction, etc.)

• Replacement of the business owner or a non-salaried partner

A CDD concluded outside these grounds may be reclassified as a CDI by the industrial tribunal (conseil de prud'hommes), exposing the employer to substantial compensation.

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Maximum Duration: What the Law States in 2026

CDD Duration and Renewals

The total duration of a CDD, including renewals, is capped at 18 months in the vast majority of cases (Art. L1242-8-1). Exceptions exist:

• 9 months for certain contracts pending the commencement of service by an employee recruited on a CDI, or for urgent work related to safety

• 24 months for contracts executed abroad or in the context of an exceptional export order

• No express legal limit for seasonal or standard-use contracts, subject to the duration of the task

Since the El Khomri Act (2016) and its implementing decrees, social partners may, through an extended branch agreement, adjust these maximum durations as well as the number of permitted renewals (two maximum in the absence of an agreement). In 2026, several branches (transport, cleaning, digital) have indeed negotiated derogatory provisions that should be consulted before any recruitment.

The Waiting Period Between Two CDDs

When a CDD ends, a waiting period is required before concluding a new CDD or a temporary employment contract for the same position (Art. L1244-3):

• 1/3 of the total contract duration if the contract is 14 days or more

• 1/2 of the total duration if the contract is less than 14 days

This waiting period may be waived in the case of replacement of an absent employee, a seasonal CDD or a standard-use contract.

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Probationary Period, Remuneration and Severance Pay

The Probationary Period

In a CDI, the probationary period is governed by Article L1221-19. Its maximum legal duration (including renewal) is:

• 2 months for workers and employees

• 3 months for supervisors and technicians

• 4 months for managerial staff (cadres)

In a CDD, the probationary period is proportional to the duration of the contract: 1 day per week of the contract, up to a maximum of 2 weeks for a CDD of 6 months or less, and 1 month for a CDD exceeding 6 months (Art. L1242-10).

The End-of-Contract Allowance (IFC): The "Precarity Bonus"

This is one of the most significant differences between a CDI and a CDD. Upon the expiry of a CDD not renewed as a CDI, the employee receives an end-of-contract allowance equal to 10% of the total gross remuneration paid (Art. L1243-8). This allowance is not due in certain cases: seasonal contract, apprenticeship contract, early termination at the initiative of the employee, gross misconduct, or refusal of a CDI offered by the employer for the same position.

In a CDI, no end-of-contract allowance is automatically payable upon termination. However, an employee dismissed without real and serious cause is entitled to a statutory redundancy payment after 8 months of service (Art. L1234-9, calculated on the basis of 1/4 of a month's salary per year for the first 10 years), as well as industrial tribunal compensation capped by the "Macron scale" (Labour Ordinance of 22 September 2017, confirmed by the Court of Cassation in 2021).

Rights to Training and Unemployment Benefits

With regard to unemployment insurance, employees on a CDD are entitled to ARE (Allocation de Retour à l'Emploi — Return-to-Employment Allowance) provided they have worked at least 6 months over the last 24 months (Unédic reform 2023). The duration of compensation is calculated according to the degressive rules in force. CDI holders who resign are only entitled to ARE under restrictive conditions (career transition project validated by the CEP, or resignation to follow a spouse).

To explore further the documentary obligations related to employment contracts and their digitalisation, the guide to electronic signatures in business details the applicable evidentiary value requirements for HR.

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Contract Formalities and Employer Obligations

Mandatory Written Form for the CDD

The CDD must imperatively be drawn up in writing and given to the employee within 48 hours of the commencement of employment (Art. L1242-12). It must mention: the precise grounds for use, the definition of the position, the duration or precise end date, the applicable collective agreement, the remuneration, and the probationary period where applicable. The absence of a written document automatically results in reclassification as a CDI.

For a CDI, a written document is not legally mandatory (unless collective agreement provisions stipulate otherwise), but a prior employment declaration (DPAE) with URSSAF remains indispensable in all cases.

Digitalisation of Employment Contracts

Since the ordinance of 10 February 2016 transposing the European directive on trust services, the electronic signature of an employment contract is fully enforceable in France. The Certyneo AI contract generator enables the production of CDIs and CDDs compliant with the Labour Code, directly signable online with an evidentiary value at the advanced eIDAS level.

HR teams thus save valuable time: according to the Markess by exaegis 2024 report, the average signing time for a digitalised employment contract is reduced from 4.2 days to less than 12 hours. To calculate the return on investment of such an approach in your organisation, the electronic signature ROI calculator provides a personalised estimate in a few minutes.

Special Clauses: Non-Competition, Remote Working, Mobility

Whether in a CDI or a CDD, certain contractual clauses require particular attention:

• Non-competition clause: valid only if it is limited in time, geographic scope and sector of activity, and accompanied by financial compensation (Cass. soc., 10 July 2002). It is rare but possible in a CDD.

• Remote working clause: since the national interprofessional agreement (ANI) of 26 November 2020, regular remote working must be the subject of a written agreement (addendum or contractual mention).

• Mobility clause: must precisely delimit the geographic area concerned (Cass. soc., 7 June 2006).

For companies managing large volumes of contracts, consulting the comparison of electronic signature solutions helps identify the platform best suited to their HR workflows.

Applicable Legal Framework: Reference Texts in 2026

The regulations governing the CDI and the CDD are based on a dense body of legislative and regulatory provisions, of which the following are the essential dispositions to master.

Labour Code — Key Provisions:

• Art. L1221-2: general principle of the CDI as the standard employment contract

• Art. L1242-1 to L1242-4: authorised grounds for using a CDD

• Art. L1242-8-1: maximum duration of the CDD (18 months, with exceptions)

• Art. L1242-12: obligation of written form and deadline for providing it to the employee (48 h)

• Art. L1243-8: end-of-contract allowance (10% of gross pay)

• Art. L1244-3: waiting period between two CDDs

• Art. L1234-9: statutory redundancy payment in a CDI

• Art. L3123-1 et seq.: part-time contract

Digitalisation and Electronic Signature:

• eIDAS Regulation No. 910/2014 (EU): establishes three levels of electronic signature (simple, advanced, qualified). For an employment contract, the advanced signature is generally sufficient with regard to Article 25 of the regulation; the qualified signature is recommended for high-stakes acts (mutually agreed termination, settlement).

• Civil Code, Art. 1366-1367: enshrine the equivalence of the electronic signature with the handwritten signature, subject to compliance with the conditions of identification of the signatory and integrity of the document.

• Ordinance No. 2016-131 of 10 February 2016: reform of contract law having integrated the rules on electronic signatures into common law.

• GDPR No. 2016/679: the collection and processing of the personal data of signatories (identity, email address, timestamp) within the framework of an electronic signature process must comply with the principles of data minimisation (Art. 5), legal basis (Art. 6 — performance of the contract), and limited retention period. The record of processing activities (Art. 30) must mention this processing.

• Standard ETSI EN 319 132: technical specification relating to advanced electronic signature formats (XAdES, PAdES, CAdES), guaranteeing the interoperability and durability of digital evidence.

Identified Legal Risks:

An irregular CDD (absence of written form, non-compliant grounds, duration exceeded) is automatically reclassifiable as a CDI by the industrial tribunal (Art. L1245-1), entitling the employee to a reclassification allowance of at least one month's salary. Added to this are notice pay, paid leave entitlements and potentially dismissal compensation without real and serious cause.

In terms of electronic signatures, a contract signed with a tool that is not eIDAS-compliant may be challenged on proof of consent, which undermines the entire contractual relationship. It is therefore imperative to use a certified solution.

Usage Scenarios: CDI, CDD and Electronic Signatures in Practice

Scenario 1 — An Industrial SME Managing 150 Seasonal Recruitments Per Year

An agri-food sector SME employing approximately 280 permanent employees recruits between 120 and 150 seasonal workers each year between May and September. Historically, CDD contracts were printed, sent by post and sometimes signed several days after the start of the assignment, exposing the company to a reclassification risk due to the absence of a written document within 48 hours.

By deploying an advanced eIDAS-compliant electronic signature solution, the HR department reduced the average signing time from 5.4 days to less than 4 hours. The rate of contracts signed before the first day of work rose from 61% to 98%. The savings in printing, postage and document management costs were estimated at around €14,000 per season, representing a positive ROI from the first quarter of use — consistent with the ranges published in the IDC report on digital HR transformation (2024).

Scenario 2 — A Management Consulting Firm with 45 Employees

A management consulting firm working with large companies regularly integrates consultants on mission CDDs (standard-use contract, consulting sector). Contractual compliance is an image issue vis-à-vis major clients who audit the HR practices of their service providers.

By centralising the production of CDDs via an intelligent contract generator and their signature on an eIDAS platform, the firm was able to: (1) ensure that each contract contains the precise legal grounds for use, (2) automatically archive the proof of signature (certificate, timestamp, audit trail) for 10 years, (3) respond within 48 hours to contractual audit requests from its clients. The time spent by HR managers on the administrative management of contracts decreased by approximately 35% over the financial year.

Scenario 3 — An Outpatient Care Group with 12 Sites

An outpatient care group bringing together around twelve centres spread across two departments employs replacement workers on CDDs (nurses, care assistants) to cover unforeseen absences. Responsiveness is crucial: a post left unfilled within 24 hours directly impacts continuity of care.

Thanks to an integration between their HRIS and an electronic signature solution, replacement CDDs can be generated, sent and signed on mobile in less than 30 minutes, including at weekends. This fluidity has made it possible to reduce reliance on temporary employment agencies (whose margins represent on average 20 to 25% of the hourly cost according to France Travail 2024 data) and to improve the coverage rate for vacant positions from 72% to 91% within six months.

Conclusion

CDI and CDD respond to radically different legal logics: the former guarantees employment stability and commits both employer and employee over the long term, the latter constitutes a strictly regulated exception under the Labour Code, accompanied by precise formal obligations and a precarity allowance. In 2026, the digitalisation of employment contracts is no longer an option but an operational and legal necessity: it reduces delays, secures proof of consent and reduces reclassification risks.

To go further in securing your HR processes, Certyneo offers an eIDAS-compliant electronic signature solution, integrated with an intelligent contract generator and adapted to both CDI and CDD recruitment workflows. Discover our pricing and get started for free on Certyneo.