Employment Contract: Permanent (CDI) vs Fixed-Term (CDD) Differences

Introduction

The choice between a permanent employment contract (CDI – Contrat à Durée Indéterminée) and a fixed-term employment contract (CDD – Contrat à Durée Déterminée) is one of the most structuring decisions for any employer. These two types of employment contracts are subject to distinct legal regimes, governed by the French Labour Code, and involve very different rights and obligations for both the employer and the employee. Understanding their fundamental differences — duration, conditions for termination, renewal, compensation — is essential for recruiting in full compliance. This article presents you with a comprehensive and practical analysis of CDI and CDD, from their formation to their termination, including best practices for contract formalisation.

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CDI and CDD: Definitions and General Legal Framework

The CDI, the Standard Employment Contract

The permanent employment contract is the normal and general form of employment relationship in France. Article L. 1221-2 of the French Labour Code expressly states that "the permanent employment contract is the normal and general form of employment relationship". The CDI has no fixed end date: it continues until either party terminates it according to legal procedures. This permanence is its fundamental characteristic.

Regarding formalities, although a CDI can in principle be concluded verbally for a full-time position, practice systematically requires a written document. The applicable collective agreement often requires a formalised contract. The use of electronic signature for HR today considerably facilitates the rapid and traceable finalisation of these documents, with full legal validity.

The CDD, a Strictly Limited Exception

Unlike the CDI, the CDD is a strict legal exception. Article L. 1242-1 of the French Labour Code establishes a fundamental principle: a CDD may only be concluded for the execution of a precise and temporary task. Abusive use of the CDD is sanctioned by automatic requalification as a CDI, which exposes the employer to significant compensation.

The law exhaustively lists the authorised cases for recourse: replacement of an absent employee, temporary increase in activity, seasonal employment, or contracts concluded in certain specific sectors (audiovisual, research, etc.).

Note: The CDD must imperatively be drawn up in writing and provided to the employee within two business days following employment (art. L. 1242-12 of the Labour Code). The absence of a written document results in requalification as a CDI.

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Duration, Renewal and Contract Term

Maximum Duration of the CDD

The total duration of the CDD, including renewals, cannot exceed 18 months in most cases (art. L. 1243-13). This limit is increased to 24 months for certain specific situations (contract performed abroad, permanent departure of an employee before job suppression). Conversely, seasonal contracts may be renewed without any limitation on total duration under certain collective agreement conditions.

Since the law of 29 March 2023 known as the "Labour Market Law", social partners may, through an extended branch agreement, derogate from the common law rules on maximum duration and number of CDD renewals. These agreements can thus adapt the legal regime to sectoral realities.

CDD Renewal

A CDD may be renewed a maximum of two times (since the Rebsamen law of 2015). Each renewal must be the subject of an amendment signed before the initial expiry date of the contract. The succession of CDDs for the same position is also regulated: a waiting period (generally one-third of the contract duration) is required between two CDDs to prevent misuse.

The Concept of Term in a CDI

The CDI has, by definition, no fixed term. Its termination can only occur through resignation, dismissal, consensual termination agreement, retirement or departure. These procedures are all governed by the Labour Code and generate, depending on the case, specific compensation and procedural obligations.

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Contract Termination: Radically Different Regimes

Terminating a CDI

The termination of a CDI at the employer's initiative (dismissal) is subject to strict procedures: preliminary hearing, written notification, genuine and serious grounds, compliance with notice period. In the event of economic dismissal or for personal reasons, the employee receives a statutory dismissal compensation (art. L. 1234-9) provided they have at least 8 months of uninterrupted service.

The homologated consensual termination (art. L. 1237-11 to L. 1237-16) offers a consensual alternative allowing the employer and employee to agree on the terms of termination. It must be homologated by DREETS within 15 business days. In 2024, more than 500,000 consensual terminations were homologated in France, according to DARES data.

Terminating a CDD: A Very Limited Freedom

The CDD cannot in principle be terminated before its expiry except in strictly defined cases by law:

• agreement of the parties;

• gross misconduct by the employee;

• force majeure;

• incapacity confirmed by the occupational health physician;

• hiring as a CDI by the employee (under conditions).

Any early termination outside these cases exposes the employer to paying the employee damages and interest corresponding to the remuneration they would have received until the contract's expiry date (art. L. 1243-4). This provision makes early termination of a CDD potentially very costly.

End of Contract Compensation (Precariousness Bonus)

At the end of a CDD that is not renewed or followed by a CDI, the employee receives an end of contract compensation equal to 10% of the total gross remuneration paid during the contract (art. L. 1243-8). This compensation, often called the "precariousness bonus", is one of the legal compensations for the inherent instability of a CDD. It is not due in certain cases (seasonal employment, employee's refusal of a CDI).

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Contract Formalisation: Obligations and Best Practices

Mandatory Provisions

Whether for a CDI or CDD, the employment contract must include specific provisions. For the CDD, article L. 1242-12 requires in particular: the reason for recourse, designation of the position held, end date or minimum duration, duration of any trial period, remuneration, applicable collective agreement.

For part-time CDI (art. L. 3123-6), a written document is mandatory and must specify the weekly or monthly duration, the distribution of working hours, and conditions for any eventual modification.

Trial Period

The trial period is regulated differently depending on the type of contract. In a CDI, its maximum duration ranges from 2 months (workers) to 4 months (executives), renewable once if the collective agreement provides for it. In a CDD, it is calculated in proportion to the contract duration: one day per week up to a maximum of 2 weeks for contracts under 6 months, and one month beyond.

Digitalising the Signature of Employment Contracts

The dematerialisation of employment contracts is now fully recognised. You can consult our complete guide to electronic signature to understand the signature levels applicable (simple, advanced, qualified) depending on the document's stakes. For standard employment contracts (CDI, CDD), an advanced electronic signature compliant with the eIDAS regulation is generally sufficient and offers optimal evidential value.

The use of Certyneo's AI contract generator allows you to quickly produce templates compliant with the latest legal developments, with direct integration of the signature workflow. This considerably reduces the time between the hiring decision and the legal formalisation of the contractual relationship.

For further comparison of available market tools, our comparison of electronic signature solutions helps you choose the platform suited to your volume and compliance requirements.

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Comparative Summary Table: CDI vs CDD

| Criterion | CDI | CDD | |---|---|---| | Duration | Indefinite | Determined (18 months max generally) | | Written document mandatory | No (except part-time) | Yes, within 2 business days | | Renewal | Not applicable | Maximum 2 times | | Early termination | Dismissal, resignation, consensual termination | Limited cases (gross misconduct, agreement, force majeure…) | | End of contract compensation | Dismissal compensation (from 8 months) | Precariousness bonus = 10% of gross | | Trial period | 2 to 4 months depending on category | Proportional to duration | | Use | Permanent employment | Precise and temporary task only |

This synthetic table illustrates the extent of differences between these two contractual forms. The choice of the right contract not only determines the employer-employee relationship but also the legal and financial health of the company. You can also find contract templates to download directly compliant with applicable legal requirements.

Legal Framework Applicable to CDI and CDD Employment Contracts

The regulations applicable to employment contracts in France come primarily from the French Labour Code (Parts L. 1221 et seq.), supplemented by branch collective agreements and company agreements.

Fundamental Texts:

• Article L. 1221-2 of the Labour Code: establishes the CDI as the normal and general form of employment relationship.

• Articles L. 1242-1 to L. 1248-11: define the complete legal regime of the CDD, including authorised cases for recourse, mandatory provisions, renewal rules and sanctions for non-compliance.

• Article L. 1243-4: provides for the payment of damages and interest in case of irregular early termination of the CDD by the employer.

• Article L. 1243-8: establishes the CDD end-of-contract compensation (10% of total gross remuneration).

• Article L. 1234-9 and Decree No. 2017-1398 of 25 September 2017: set the calculation of statutory dismissal compensation for CDIs.

• Articles L. 1237-11 to L. 1237-16: govern the consensual termination of the CDI.

• Law No. 2023-270 of 29 March 2023 known as "Labour Market": opens the possibility of derogating by branch agreement from the legal rules on CDD duration and renewal.

Legal Value of Electronic Signature on Employment Contracts:

The electronic signature of employment contracts is fully recognised under French and European law. Article 1366 of the Civil Code states that "electronic writing has the same probative force as writing on paper support". Article 1367 specifies the conditions for validity of electronic signature: it must consist of the use of a reliable identification process guaranteeing its link with the act to which it is attached.

At European level, Regulation eIDAS No. 910/2014 of 23 July 2014 (and its revised eIDAS 2.0 currently being deployed) defines three levels of electronic signature: simple, advanced (SES) and qualified (QES). For ordinary employment contracts (CDI, CDD), advanced electronic signature is generally sufficient. Qualified signature may be recommended for higher-stakes documents.

Legal Risks to Anticipate:

• CDD Requalification as CDI: automatic if the CDD is concluded outside legal cases, without a written document, without valid grounds or after exceeding the maximum duration. It exposes the employer to a requalification compensation of at least one month's salary (art. L. 1245-2).

• Undeclared work (art. L. 8221-3): abusive use of CDDs may be requalified as concealment of salaried employment.

• The absence of compliant signature or delivery within legal time limits may invalidate certain clauses (non-compete, confidentiality) and weaken the employer's position in case of labour court litigation.

Compliance with GDPR No. 2016/679 is also required when collecting and processing personal data of candidates and employees in the context of the dematerialised signature process.

Usage Scenarios: CDI, CDD and Electronic Signature

Scenario 1: An SME in the Industrial Sector Managing Dozens of Seasonal Hirings per Year

An SME in the food processing sector employing approximately 120 permanent employees recruits between 40 and 60 seasonal workers annually on CDD for a period of 3 to 5 months. Previously, paper management of contracts resulted in delays of several days between the hiring decision and actual signature, with risks of non-delivery within the legal 2 business day window.

By deploying an electronic signature solution integrated into its HRIS, the SME reduced this delay to less than 4 hours on average. CDD contracts are automatically generated from compliant templates, sent by SMS and email to seasonal workers, and signed from a smartphone without physical travel. The rate of contracts delivered outside the legal time limit fell to zero, eliminating a systematic requalification risk. Estimated gain: 60% reduction in HR administrative time during peak periods.

Scenario 2: A Digital Transformation Consulting Firm Converting CDDs to CDIs

A consulting firm of about fifteen consultants regularly hires consultants on CDD of use (audiovisual/consulting sector), followed by a CDI offer. Sequential management of the two contracts — initial CDD, then CDI — represented a significant document burden and risks of error on mandatory provisions.

With the adoption of an electronic signature platform integrating a customizable contract generator, the firm was able to standardise its CDI and CDD templates according to its collective agreement requirements. Each conversion is tracked with certified timestamp, facilitating proof in case of labour court challenge. The firm also saved approximately €2,500 annually in printing, postage and paper archiving costs.

Scenario 3: A Mid-Cap Company in the Health Sector Managing Medical Replacements on CDD

A care structure employing approximately 350 employees (including 80 healthcare professionals with salaried status) regularly uses doctors and nurses on replacement CDD. Formalisation speed is critical: a replacement may be decided 24 hours in advance, making the paper process impossible.

By leveraging an eIDAS-compliant electronic signature solution with enhanced authentication, the structure sends the CDD contract from its HR dashboard in less than 10 minutes. The signatory receives a secure link, signs in a few clicks, and the employer has a timestamped proof immediately archived. This process has allowed the firm to reduce by three the processing time for urgent replacement administration, while guaranteeing the legal compliance of each contract.

Conclusion

CDI and CDD are two complementary but radically different legal instruments: duration, formalities, conditions for termination, compensation — each criterion requires particular attention to avoid errors with potentially serious consequences (requalification, labour court litigation, fines). Mastering these differences is an obligation for every employer concerned with compliance and legal security.

Beyond choosing the right contract, rapid and traceable formalisation remains a major operational issue. eIDAS-compliant electronic signature makes it possible to meet this requirement without compromising the evidential value of signed documents.

Certyneo supports you in the digitalisation of your employment contracts, CDI and CDD alike, with secure and compliant signature workflows. Discover our HR solution on Certyneo or calculate your return on investment right now.