Indefinite vs Fixed-Term Employment Contract: Complete Comparison

The question of choosing between an indefinite-term employment contract (CDI) and a fixed-term employment contract (CDD) is one of the most frequently encountered in French employment law. For the employer, this choice commits the legal structure of the employment relationship, administrative obligations and litigation risks. For the employee, it determines job security, entitlement to compensation and career prospects. In 2025, according to DARES, over 87% of hires in France are on CDD basis, yet the CDI remains the reference standard under the French Labour Code. This article offers you a comprehensive comparison of the two contractual forms, their respective legal regimes, termination conditions and issues related to digitalisation.

The Indefinite-Term Contract (CDI): The Reference Standard

In French law, the CDI is defined by article L. 1221-2 of the Labour Code as the normal and general form of employment relationship. It does not provide for a termination date and can theoretically last throughout the employee's career. Its termination is only possible under strictly regulated conditions.

Fundamental Characteristics of the CDI

The CDI can be concluded without particular formalism for a full-time contract, but drafting in writing is strongly recommended — and mandatory for part-time contracts (article L. 3123-6 of the Labour Code). It can be full-time or part-time, with or without a probation period (the duration of which varies according to professional category: 2 months for manual workers and employees, 3 months for supervisors and technicians, 4 months for executives, in accordance with article L. 1221-19).

An employer wishing to terminate a CDI must comply with a strict procedure: notice of meeting, reflection period, written notice of decision, and payment of statutory severance compensation after one year of service (article L. 1234-9). In the case of mutual termination (article L. 1237-11 to L. 1237-16), the parties must obtain approval from the DREETS.

Part-Time CDI: Specific Features to Know

The part-time CDI requires a minimum weekly working time of 24 hours, except where collective agreement or employee's written request for personal reasons provides otherwise. The contract must mention the distribution of working hours, conditions for modifying this distribution and limits applicable to additional hours. Any breach exposes the employer to reclassification of the contract as full-time, with significant financial consequences. To automate the generation and signature of these sensitive documents, HR teams can rely on the electronic signature solution dedicated to human resources offered by Certyneo.

The Fixed-Term Contract (CDD): Regulated Exception Use

Unlike the CDI, the CDD is an exceptional contract: it can only be concluded in cases strictly provided for by law (article L. 1242-2 of the Labour Code). Abusive use exposes the employer to judicial reclassification as a CDI, together with damages.

Legal Grounds for Resorting to CDD

The authorised use cases are as follows:

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

• Temporary increase in business activity of the company

• Seasonal employment in expressly defined sectors

• Custom contracts in certain sectors (audiovisual, entertainment, education, catering and hospitality) where it is customary not to use CDI

• Recruitment of unemployed persons encountering particular employment insertion difficulties (supported contracts)

Article L. 1242-1 of the Labour Code establishes the general prohibition: "A fixed-term employment contract, whatever its ground, may neither have as its object nor as its effect the permanent filling of a job linked to the normal and permanent activity of the company."

Maximum Duration, Renewal and Probation Period

The maximum duration of a CDD varies depending on the ground: 18 months as a general rule, 9 months for awaiting a hired employee's start date of a CDI or urgent work, 24 months for exceptional export order or contract performed abroad (article L. 1242-8). The CDD is renewable twice, within the limit of its maximum duration. At the end of the contract, a probation period is imposed before resorting to a new CDD for the same post: one-third of the contract duration if it is longer than 14 days, half its duration in other cases (article L. 1244-3).

End of Contract Compensation and Employee Rights in CDD

At the normal expiry of a CDD, the employee receives a precarity compensation equal to 10% of the total gross remuneration received during the contract (article L. 1243-8), reduced to 6% if a collective agreement provides for consideration in terms of training. The CDD employee enjoys the same rights as the CDI employee (paid leave, meal vouchers, access to collective facilities, equal pay for equivalent work) by virtue of the principle of equal treatment.

Comparative Table CDI / CDD: Decisive Criteria

To quickly visualise the differences between indefinite-term and fixed-term employment contracts, here are the essential criteria:

| Criterion | CDI | CDD | |---|---|---| | Duration | Unlimited | Limited (max. 18 to 24 months depending on ground) | | Formalism | Writing recommended (mandatory part-time) | Writing mandatory, provided within 2 working days | | Probation period | Yes (variable duration) | Yes (limited to 1 day/week, max. 2 weeks if ≤ 6 months; 1 month if > 6 months) | | Early termination | Dismissal or resignation regulated | Limited cases only (gross misconduct, mutual agreement, incapacity) | | End compensation | Statutory dismissal compensation (if employer termination) | Precarity compensation 10% | | Renewal | N/A | 2 times, within maximum duration limit |

Electronic Signature of Employment Contracts: Issues and Best Practices

Since Ordinance No. 2016-131 of 10 February 2016 reforming contract law, and in accordance with eIDAS Regulation No. 910/2014, electronic signature is fully recognised for employment contracts. The Court of Cassation has confirmed that electronic writing has the same probative force as paper, provided that the signatory's identity can be duly identified and the document's integrity is guaranteed.

What Level of Signature to Choose for an Employment Contract?

The eIDAS regulation distinguishes three levels of electronic signature:

• Simple Electronic Signature (SES): sufficient for many routine acts, but offering limited traceability.

• Advanced Electronic Signature (AES): recommended for employment contracts, as it links the signature to an identified signatory and detects any subsequent document alteration.

• Qualified Electronic Signature (QES): maximum level, legal equivalent of handwritten signature in the EU; required for certain notarial or administrative acts.

For CDIs and CDDs, advanced electronic signature constitutes the standard market best practice recommended by legal doctrine and most advanced HR practices. To learn more about choosing the right level, consult our complete guide to electronic signature.

Operational Benefits of Digitalisation

Electronic signature of employment contracts brings measurable benefits: reduction of signature time from several days to a few hours, elimination of printing, postage and paper archiving costs, tamper-proof timestamped traceability, and facilitation of remote work or international hiring. Companies using eIDAS-compliant platforms report a 60 to 80% reduction in administrative time related to contract management, according to sector studies published by specialist HR transformation firms.

To compare the solutions available on the market before making your choice, our comparison of electronic signature solutions presents the essential technical and pricing criteria. Furthermore, if your company is already using a competing tool, our migration offer to Certyneo supports you without service disruption.

Reclassification as CDI: Risks to Anticipate

The major issue with the CDD remains the risk of judicial reclassification as a CDI before the Labour Court. This risk materialises in several situations:

• Absence of writing: the CDD must be provided to the employee within two working days following hiring (article L. 1242-13); failing this, it is deemed to be a CDI.

• Unlawful or vague ground: recourse to temporary increase in activity must be circumstantiated and dated; vague wording is sufficient to trigger reclassification.

• Exceeding maximum duration: any overage, even by one day, automatically triggers reclassification.

• Non-compliance with probation period: chaining two CDDs without respecting the statutory period is penalised.

In case of reclassification, the employer faces the risk of paying reclassification compensation (at least one month's salary), potential salary arrears, and depending on the situation, damages for wrongful termination of the CDI thus reclassified. Electronic signature, thanks to certified timestamping, constitutes irrefutable proof of the contract delivery date, significantly reducing this procedural risk. To understand compliance mechanisms related to the eIDAS regulation, our guide on eIDAS Regulation 2.0 details applicable technical and legal requirements.

Applicable Legal Framework for Employment Contracts and their Signature

Employment Law: Fundamental Texts

The legal regime of the indefinite-term and fixed-term employment contract is based principally on the provisions of the Labour Code, in particular:

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

• Articles L. 1242-1 to L. 1248-11: define validity conditions, authorised grounds, maximum duration, renewal, probation period and sanctions applicable to CDD.

• Article L. 1243-8: sets precarity compensation at 10% of total gross remuneration.

• Article L. 1242-13: requires delivery of written CDD within two working days.

• Articles L. 1237-11 to L. 1237-16: govern approved CDI mutual termination.

• Article L. 3123-6: makes writing mandatory for any part-time contract.

Legal Recognition of Electronic Signature

The probative value of electronic signature is established by several converging texts:

• Article 1366 of the French Civil Code: "Electronic writing has the same probative force as writing on paper support, provided that the person from whom it emanates can be duly identified and that it is established and maintained under conditions of a nature to guarantee its integrity."

• Article 1367 of the French Civil Code: "The signature necessary for the perfection of a legal act identifies its author. It manifests their consent to the obligations arising from this act. When it is affixed by a public officer, it confers authenticity on the act. When it is electronic, it consists of the use of a reliable identification procedure guaranteeing its link with the act to which it relates."

• eIDAS Regulation No. 910/2014 of the European Parliament and of the Council of 23 July 2014 on electronic identification and trust services: defines the three levels of signature (simple, advanced, qualified) and their legal value in the Member States. Qualified electronic signature benefits from a legal presumption of authenticity.

• Ordinance No. 2016-131 of 10 February 2016: integrated into the Civil Code full and complete recognition of electronic writing and signature.

Personal Data Protection

The collection and processing of personal data of signatories (identity, email address, timestamp) in the context of electronic signature of employment contracts are subject to the General Data Protection Regulation (GDPR) No. 2016/679. The employer, in its capacity as data controller, must in particular:

• Have a legal basis (contract performance, article 6.1.b of GDPR)

• Inform the employee (article 13 of GDPR)

• Guarantee data security and their limited-time storage

• Conclude a processor contract compliant (article 28) with the electronic signature service provider

Qualified trust service providers must also meet the requirements of standards ETSI EN 319 132 (XAdES format) and ETSI EN 319 122 (CAdES format) for the creation of advanced and qualified electronic signatures, guaranteeing interoperability and longevity of digital evidence.

Usage Scenarios: CDI, CDD and Electronic Signature in Practice

Scenario 1 — An Industrial SME Managing Several Hundred Seasonal CDDs Per Year

An SME of 80 permanent employees operating in the agri-food sector recruits approximately 250 seasonal staff between April and September each year. Previously, managing CDDs involved printing, postal dispatch, telephone follow-up and manual filing of each contract. The average return time for the signed contract reached 4 to 7 working days, regularly generating situations of employees at work without signed contract — a major legal risk source.

By deploying an eIDAS-compliant advanced electronic signature solution, the SME reduced this time to less than 2 hours on average. Contract delivery is automatically timestamped, which satisfies the obligation of article L. 1242-13 of the Labour Code. The rate of contentious reclassification for failure to deliver within deadlines was reduced to zero. Time saving estimated: 3 FTE-weeks per seasonal recruitment campaign, i.e. a reduction of approximately 70% of HR administrative time dedicated to this task.

Scenario 2 — A Digital Transformation Consulting Firm Recruiting Executive Profiles in CDI

A consulting firm of some forty consultants recruits between 15 and 25 executives per year, often remotely or from abroad. Electronic signature of CDIs — including non-competition clause, confidentiality agreement and variable compensation annex — allows finalising the entry into contractual relationship in less than one business day, regardless of the future employee's time zone.

The firm was able to observe a 40% reduction in withdrawal rate between accepted offer and actual signature, by shortening the window of uncertainty. The electronic audit trail (access logs, IP, timestamp of each signature) also constitutes robust evidence in case of dispute over contract content or acceptance date. The AI-powered contract generator integrated into the Certyneo platform, accessible via the AI-powered contract generator, also allows customising executive CDI templates in a few minutes.

Scenario 3 — A Healthcare Establishment Group Managing Frequent Replacements

A hospital group of approximately 1,200 beds regularly employs doctors and nurses on replacement CDDs, sometimes for periods of 24 to 72 hours. The operational constraint is extreme: the contract must be signed before work starts, within timeframes incompatible with postal dispatch or even physical travel.

The implementation of mobile electronic signature (via link sent by SMS or email) enabled the HR department to have replacement contracts signed in less than 15 minutes, including outside business hours. GDPR compliance is ensured by processing data on servers hosted within the European Union. The annual summary shows savings of 8,000 € in postage and printing costs, and an 85% reduction in disputes related to the absence of written contract at the start of the posting.

Conclusion

The choice between an indefinite-term employment contract and a fixed-term employment contract is not merely a question of comfort or flexibility: it commits precise legal obligations, rights for the employee and significant litigation risks for the employer if formalities are not observed. The CDI remains the reference standard under French employment law, whilst the CDD, subject to strict conditions, must be handled with rigour.

In this context, electronic signature constitutes a major lever for legal security and operational efficiency: it guarantees the traceability of contract delivery, reduces signature timescales and protects the company in case of litigation. Certyneo supports you in the digitalisation of all your HR contracts, in full compliance with eIDAS Regulation and GDPR.

👉 Discover Certyneo pricing and start signing your employment contracts electronically today.