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

The choice between an employment contract of indefinite duration (CDI) and a fixed-term employment contract (CDD) is one of the most structuring contractual decisions in French employment law. Yet employers and employees often confuse their respective regimes, formal obligations and consequences in the event of termination. This article offers you an in-depth analysis of the legal and practical differences between CDI and CDD, the conditions for using each, the rules of form and substance, right through to the question of electronic signature of these contracts.

The CDI: The Standard-Form Contract in France

The employment contract of indefinite duration is defined by article L.1221-2 of the French Labour Code as the normal and general form of an employment relationship. It does not contain a fixed term set in advance, making it the default regime to which other contracts provide exceptions.

Essential Characteristics of the CDI

The CDI can be concluded for any permanent position within a company. It does not, in principle, require a mandatory written form for full-time contracts governed by the national collective agreement — although in practice, written documentation is systematically recommended. By contrast, the part-time CDI must imperatively be drafted in writing (art. L.3123-6 of the Labour Code) and must state the agreed weekly or monthly duration.

From the perspective of stability, the CDI offers maximum protection to the employee: termination at the employer's initiative requires a genuine and serious reason, a respected redundancy procedure and, in most cases, payment of a statutory redundancy payment (calculated on the basis of articles L.1234-9 and R.1234-1 onwards of the Labour Code).

Termination of the CDI: Procedures and Compensation

Termination of the CDI can take place in several ways:

• Dismissal (individual or economic): subject to a prior meeting procedure, observance of notice period and payment of compensation.

• Resignation: the employee must give notice, the length of which is set by the collective agreement or custom.

• Negotiated termination (art. L.1237-11 to L.1237-16 of the Labour Code): friendly procedure approved by the DREETS, conferring unemployment insurance entitlements.

For HR teams managing many contracts, the adoption of an electronic signature solution for HR enables these documents to be secured and processing times to be accelerated.

The CDD: An Exception Contract Subject to Strict Conditions

Unlike the CDI, the CDD is an exception contract. Article L.1242-1 of the Labour Code states that it may only be concluded for the performance of a specific and temporary task, and only in the cases exhaustively listed by law. Any breach of these rules exposes the employer to judicial reclassification of the CDD as a CDI.

Authorised Cases for Using the CDD

The legislature authorises the use of the CDD in the following situations:

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

• Temporary increase in activity

• Seasonal or customary employment in certain sectors (audiovisual, hospitality, etc.)

• Certain assisted contracts or apprenticeships

It is strictly forbidden to conclude a CDD to permanently fill a position linked to the normal and permanent activity of the company (art. L.1242-2 of the Labour Code).

Mandatory Formalities and Content of the CDD

Unlike the full-time CDI, the CDD is mandatory in writing (art. L.1242-12 of the Labour Code). The absence of written documentation automatically results in reclassification as a CDI. The contract must contain mandatory provisions:

• Precise definition of the reason for use

• Designation of the position occupied

• Minimum duration or specific end date

• Remuneration and its components

• Applicable collective agreement

The CDD must be provided to the employee no later than two working days following recruitment (art. L.1242-13 of the Labour Code). A delay in this transmission can also support a request for reclassification.

Managing these tight deadlines is made easier by the use of an AI-powered contract generator capable of producing compliant documents within minutes.

Duration, Renewal and Succession of Contracts

One of the most significant practical differences between CDI and CDD lies in the rules governing duration and renewal.

Maximum Duration and Renewal of the CDD

The total duration of a CDD (including renewals) cannot in principle exceed 18 months, except for exceptions (contract concluded while awaiting a CDI recruit: 9 months; urgent work: 9 months; seasonal employment: without specific limitation). The CDD may be renewed a maximum of twice since the law of 5 September 2018 (Skills Investment Law), within the limit of the applicable maximum duration.

The Waiting Period Between Two CDDs

Between two successive CDDs for the same position, a waiting period must be observed (art. L.1244-3 of the Labour Code):

• 1/3 of the duration of the previous contract if it was at least 14 days

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

This period is intended to prevent abusive use of the CDD to fill a permanent position. Failure to observe it constitutes an offence of precarious work.

End-of-Contract Payment

At the end of a CDD, the employee receives a precariousness payment equal to 10% of the total gross remuneration paid during the contract (reduced to 6% in certain sectors by collective agreement). This payment is not due in the case of a seasonal CDD, an assisted contract, or when the employee refuses a CDI for the same position.

Practical Comparison: CDI vs CDD, Table of Differences

To summarise the most operational points of divergence between these two types of contract, here are the essential axes of comparison.

Form, Duration and Termination

| Criterion | CDI | CDD | |---|---|---| | Written form | Recommended (mandatory for part-time) | Mandatory under penalty of reclassification | | Duration | Indefinite | Maximum 18 months (subject to exceptions) | | Probation period | Depending on seniority and category | Calculated in proportion to contract duration | | Early termination | Dismissal, resignation, negotiated termination | Gross misconduct, force majeure, mutual agreement or unfitness | | End-of-contract payment | Redundancy payment (if dismissed) | Precariousness payment (10%) |

Cost and HR Management

Although the CDD generates a precariousness payment at its end, it may seem less binding for the employer in the short term. In reality, the risks of reclassification, enhanced formality obligations and industrial tribunal disputes make it an expensive tool if misused. According to data published by the State Council in its 2024 annual report on administrative employment litigation, reclassifications of CDDs as CDIs represent a significant share of disputes brought before the Labour Court.

In this context, the dematerialisation and traceability of employment contracts become a strategic lever. A comparison of electronic signature solutions enables you to identify the tool best suited to your volume and compliance requirements.

Electronic Signature of Employment Contracts: CDI and CDD

Since Ordinance No. 2016-131 of 10 February 2016 on the reform of contract law, electronic signature has enjoyed full legal value under French law, provided it complies with the requirements of Regulation eIDAS (EU) No. 910/2014. Employment contracts — whether CDI or CDD — can therefore be signed electronically without loss of evidential value.

Level of Signature Required for an Employment Contract

For standard employment contracts, an advanced electronic signature (AES) is generally sufficient. It guarantees reliable identification of the signatory and document integrity. For documents with higher stakes (negotiated termination, confidentiality agreement, assignment of rights), a qualified signature may be preferred. To understand signature levels in full, see our complete electronic signature guide.

Practical Advantages for HR Teams

The adoption of electronic signature for CDIs and CDDs generates measurable gains:

• Reduction in signature times: from several days to a few hours

• Automated compliance: time-stamped archiving, complete audit trail

• Reduced risk of reclassification: proof of CDD transmission date within legal deadlines

• HRIS integration: connection to existing HR tools via API

If you are currently using another solution and wish to optimise your costs, the migration offer to Certyneo enables rapid transition without data loss.

Legal Framework Applicable to CDI and CDD Contracts

Labour Code: Founding Texts

The legal regime for indefinite-duration and fixed-term employment contracts is primarily codified in the Labour Code:

• Article L.1221-2: principle of CDI as standard form

• Articles L.1242-1 to L.1242-16: conditions of use, duration and formalities of CDD

• Article L.1244-3: waiting period between two successive CDDs

• Articles L.1237-11 to L.1237-16: negotiated termination of CDI

• Article L.3123-6: obligation to write for part-time CDI

Reclassification of a CDD as a CDI is enforced by labour courts on the basis of article L.1245-1 of the Labour Code, which notably provides for payment of a reclassification bonus equal to at least one month's salary.

Legal Value of Electronic Signature

Electronic signature of employment contracts is governed by several texts:

• Civil Code, articles 1366 and 1367: electronic signature has the same legal value as handwritten signature provided it enables the signatory to be identified and guarantees document integrity.

• Regulation eIDAS No. 910/2014 (EU): defines three levels of signature (simple, advanced, qualified) and imposes minimum technical requirements for each. Regulation eIDAS 2.0, currently being rolled out, strengthens these provisions by introducing the European digital identity wallet (EUDIW).

• Ordinance No. 2016-131 of 10 February 2016: transposed European provisions on electronic signature and digital evidence into French law.

• ETSI EN 319 132 Standard: technical specification for advanced electronic signatures in XAdES/PAdES format, applicable to qualified trust service providers.

GDPR and Personal Data in Contracts

Employment contracts contain sensitive personal data (identity information, salary, bank details). Their processing is subject to the General Data Protection Regulation (GDPR) No. 2016/679:

• Legal basis obligation (art. 6 GDPR: contract performance)

• Storage duration limited to the legal retention period for employment contracts (5 years after the end of the contract according to CNIL recommendations)

• Employee right of access and rectification

• Processing security (art. 32 GDPR): obligation to encrypt and ensure integrity of electronically signed documents

Electronic signature providers compliant with eIDAS, such as Certyneo, integrate these requirements into their technical architecture and data sub-processing policy (DPA), guaranteeing complete compliance for the employer.

Concrete Usage Scenarios

Scenario 1: An Industrial SME Managing Several Dozen Seasonal CDDs Per Year

An industrial SME with around 150 permanent employees recruits between 40 and 60 seasonal workers each summer for durations varying from 6 to 12 weeks. Managing these CDDs on paper previously resulted in frequent delays in providing contracts to employees, exposing the company to reclassification risks. By deploying an advanced electronic signature solution compliant with eIDAS, the HR department was able to:

• Reduce the average contract delivery and signature time from 4.5 days to less than 4 hours

• Automatically generate a time-stamped audit trail proving compliance with the 2-day working day deadline imposed by article L.1242-13 of the Labour Code

• Reduce by 80% the volume of paper related to seasonal contract management

This type of result is consistent with the ranges published in sectoral reports by the ANDRH (National Association of HR Directors) on HR digitalisation.

Scenario 2: A Management Consulting Firm Dematerialising its CDI Hires

A consulting firm employing around a hundred consultants manages frequent recruitments and probation periods requiring renewal. Each CDI required validation by the director, HR manager and candidate, often remotely. With the introduction of multi-party electronic signature, the firm was able to:

• Reduce the CDI finalisation time (from proposal to signature) from 8 to 9 days to less than 48 hours

• Eliminate version errors (wrong printed version, signature on an incomplete document)

• Integrate the solution into its HRIS via API, automating archiving in the employee file upon signature

This time saving represents, on the basis of 40 annual recruitments, a saving of several dozen hours of administrative work, resulting in a measurable ROI within the first few months. You can estimate your own gains using the electronic signature ROI calculator.

Scenario 3: A Mid-Market Company in the Distribution Sector Managing Negotiated CDI Terminations

A distribution company with around 800 employees processes approximately forty CDI negotiated terminations each year. These documents, subject to approval by the DREETS, require irreproachable traceability. By using a qualified signature for these sensitive documents, the company was able to:

• Legally secure each negotiated termination with reinforced proof of signatory identity

• Reduce disputes related to signature contestation by 100% for electronically signed contracts over the past 3 years

• Maintain archives in a certified digital safe, immediately accessible in the event of labour court proceedings

Conclusion

CDI and CDD serve distinct needs but share a common requirement: strict compliance with contractual formalities. The CDI, as the standard-form contract, offers stability and controlled flexibility in termination. The CDD, as an exception contract, imposes strict rules of substance and form, non-compliance with which exposes the employer to costly reclassifications. In both cases, dematerialisation and electronic signature constitute today an essential lever to ensure compliance, traceability and speed of execution.

Certyneo supports you in the compliant electronic signature of all your employment contracts — CDI, CDD, amendments, negotiated terminations — with signature levels adapted to each legal issue. Discover our offers and get started for free to transform your HR contract management today.