Employment Contract: Permanent Contract (CDI) vs Fixed-Term Contract (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 governed by distinct legal regimes, regulated by the French Labour Code, and involve very different rights and obligations for both the employer and the employee. Understanding their fundamental differences — duration, termination conditions, renewal, compensation — is essential for recruiting in full compliance. This article presents you with a complete and practical analysis of the permanent contract and fixed-term contract, from their formation to their termination, including best practices for contractual formalisation.

---

Permanent Contract (CDI) and Fixed-Term Contract (CDD): Definitions and General Legal Framework

The CDI, the Standard Employment Contract

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

In terms of formality, although the CDI can in principle be concluded verbally for a full-time position, practice systematically requires a written form. The applicable collective agreement often requires a formalised contract. The use of electronic signature for HR now considerably facilitates the rapid and traceable completion of these documents, with full legal validity.

The CDD, a Strictly Regulated Exception

Unlike the CDI, the CDD is a legal exception strictly regulated by law. Article L. 1242-1 of the Labour Code establishes a fundamental principle: a CDD may only be concluded for the performance of a specific and temporary task. Abusive use of the CDD is sanctioned by automatic reclassification as a CDI, which exposes the employer to significant compensation.

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

Note: the CDD must imperatively be established in writing and given to the employee within two working days following employment (Art. L. 1242-12 of the Labour Code). The absence of a written contract amounts to reclassification as a CDI.

---

Duration, Renewal and Contract Term

Maximum Duration of the CDD

The total duration of the CDD, including renewals, may not exceed 18 months in most cases (Art. L. 1243-13). This limit is extended to 24 months in certain specific situations (contract performed abroad, permanent departure of an employee before job elimination). Conversely, seasonal contracts may be renewed without limitation on total duration in certain contractual conditions.

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

Renewal of the CDD

A CDD may be renewed a maximum of twice (since the Rebsamen law of 2015). Each renewal must be documented by an amendment signed before the initial end 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) must be observed between two CDDs to prevent misuse.

The Concept of Term in the CDI

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

---

Contract Termination: Radically Different Regimes

Terminating a CDI

Termination of a CDI on the employer's initiative (dismissal) is subject to strict procedure: prior meeting, written notice, real and serious grounds, compliance with notice period. In the case of redundancy or dismissal for personal reasons, the employee receives a statutory redundancy payment (Art. L. 1234-9) provided they have at least 8 months of continuous service.

Consensual termination approved by authorities (Art. L. 1237-11 to L. 1237-16) offers an alternative allowing the employer and employee to agree on the conditions of termination. It must be approved by the DREETS within 15 working days. In 2024, more than 500,000 consensual terminations were approved in France, according to DARES data.

Terminating a CDD: Severely Limited Freedom

A CDD can in principle only be terminated before its end date in strictly defined cases under law:

• agreement of the parties;

• serious misconduct by the employee;

• force majeure;

• incapacity confirmed by the occupational health physician;

• hiring on a permanent contract by the employee (under certain 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 end of the contract (Art. L. 1243-4). This provision makes early termination of a CDD potentially very costly.

End-of-Contract Compensation ("Precarity Bonus")

At the end of a CDD that is not renewed or followed by a permanent contract, 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 "precarity bonus", is one of the legal compensations for the instability inherent in the CDD. It is not due in certain cases (seasonal employment, employee refusal of a permanent contract).

---

Contractual Formalisation: Obligations and Best Practices

Mandatory Provisions

Whether for a permanent contract or fixed-term contract, the employment contract must contain specific provisions. For the CDD, Article L. 1242-12 notably requires: the reason for use, designation of the position occupied, end date or minimum duration, duration of any trial period, remuneration, applicable collective agreement.

For the CDI on a part-time basis (Art. L. 3123-6), a written document is mandatory and must specify the weekly or monthly duration, schedule distribution, 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 varies 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 today fully recognised. You can consult our complete guide to electronic signature to understand the applicable signature levels (simple, advanced, qualified) depending on the document's stakes. For standard employment contracts (CDI, CDD), the advanced electronic signature compliant with the eIDAS regulation is generally sufficient and offers optimal probative value.

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

To go further in comparing the tools available on the market, our comparative guide to electronic signature solutions helps you choose the platform adapted to your volume and compliance requirements.

---

Comparative Summary Table: CDI vs CDD

| Criterion | CDI | CDD | |---|---|---| | Duration | Indefinite | Determined (18 months max in general) | | Written form mandatory | No (except part-time) | Yes, within 2 working days | | Renewal | Not applicable | Maximum twice | | Early termination | Dismissal, resignation, consensual termination | Limited cases (serious misconduct, agreement, force majeure…) | | End-of-contract compensation | Redundancy payment (from 8 months) | Precarity bonus = 10% of gross | | Trial period | 2 to 4 months depending on category | Proportional to duration | | Usage | Permanent employment | Specific 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 conditions the employer-employee relationship, but also the legal and financial health of the company. You can also find downloadable contract templates directly compliant with applicable legal requirements.

Legal Framework Applicable to CDI and CDD Employment Contracts

The regulation applicable to employment contracts in France is primarily derived from the Labour Code (Parts L. 1221 and following), supplemented by sectoral 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 the employment relationship.

• Articles L. 1242-1 to L. 1248-11: define the complete legal regime of the CDD, including authorised use cases, 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 the statutory redundancy payment for CDIs.

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

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

Legal value of electronic signature on employment contracts:

Electronic signature of employment contracts is fully recognised by French and European law. Article 1366 of the Civil Code states that "electronic writing has the same probative value as writing on paper". Article 1367 clarifies the conditions for validity of electronic signature: it must consist of the use of a reliable identification procedure guaranteeing its link with the act to which it attaches.

At European level, the eIDAS Regulation No. 910/2014 of 23 July 2014 (and its eIDAS 2.0 revision in deployment) defines three levels of electronic signature: simple, advanced (AES) and qualified (QES). For ordinary employment contracts (CDI, CDD), advanced electronic signature is generally sufficient. Qualified signature may be recommended for acts with higher stakes.

Legal risks to anticipate:

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

• Concealed employment (Art. L. 8221-3): abusive use of CDDs can be reclassified as concealment of salaried employment.

• The absence of compliant signature or delivery within legal timeframes can invalidate certain clauses (non-competition, confidentiality) and weaken the employer's position in case of employment tribunal dispute.

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 Industrial SME Managing Several Dozen Seasonal Hirings Per Year

An SME in the food processing sector employing about 120 permanent employees recruits between 40 and 60 seasonal workers per year on a CDD basis for a period of 3 to 5 months. Previously, paper-based contract management caused delays of several days between the hiring decision and the actual signature, with risks of non-delivery within the legal 2-working-day timeframe.

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 via SMS and email to seasonal workers, and signed from a smartphone without physical travel. The rate of contracts delivered outside the legal timeframe fell to zero, eliminating a systematic reclassification risk. Estimated gain: 60% reduction in HR administrative time during peak season.

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

A consulting firm with about fifteen consultants regularly hires consultants on CDD basis (audiovisual/consulting sector), followed by a permanent contract offer. Sequential management of the two contracts — initial CDD, then CDI — represented significant documentary burden and risks of errors in mandatory provisions.

By adopting an electronic signature platform integrating a parameterisable 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 timestamping, facilitating proof in case of employment tribunal challenge. The firm also saved approximately £2,500 annually in printing, mailing and paper archiving costs.

Scenario 3: A Mid-Size Healthcare Organisation Managing Medical Replacement CDDs

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

By relying on an eIDAS-compliant electronic signature solution with reinforced authentication, the structure sends the CDD contract from its HR dashboard in less than 10 minutes. The signer receives a secure link, signs in a few clicks, and the employer has timestamped proof immediately archived. This process has reduced the administrative processing time for urgent replacements by three, whilst guaranteeing the legal compliance of each contract.

Conclusion

Permanent contract (CDI) and fixed-term contract (CDD) are two complementary but radically different legal instruments: duration, formality, termination conditions, compensation — each criterion requires special attention to avoid errors with potentially serious consequences (reclassification, employment tribunal disputes, fines). Mastering these differences is an obligation for any 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 probative value of signed documents.

Certyneo supports you in the digitalisation of your employment contracts, both permanent and fixed-term, with secure and compliant signature workflows. Discover our HR solution on Certyneo or calculate your return on investment right now.