Overtime: Growth and Legal Calculation

Introduction: An Inescapable Reality for French Enterprises

Overtime occupies an increasingly prominent place in work organisation in France. According to DARES data published in late 2025, the volume of declared overtime hours has grown by 12% over three years, driven by labour shortages in certain sectors and increased contract flexibility. For HR teams and SME leaders, mastering the legal calculation of overtime hours is a social, fiscal and legal obligation. This article guides you through Labour Code rules, applicable increases, current exemptions and best practices in document management — notably via electronic signature for HR — to secure each stage of the process.

---

The Fundamentals of Overtime in French Law

Definition and Trigger Threshold

In accordance with Article L3121-28 of the Labour Code, overtime hours are considered all hours worked beyond the legal weekly working time, set at 35 hours. This rule applies to full-time employees on standard employment contracts. For employees subject to a days-based forfait agreement, the regime differs substantially.

The count operates on the calendar week (Monday 0:00 to Sunday 24:00), unless a collective agreement provides for another reference period. Where annual working time is organised (company or sector agreement), overtime is calculated over the year, with the threshold set at 1,607 hours.

The Annual Overtime Contingent

Article L3121-33 of the Labour Code sets the legal annual contingent at 220 hours per employee per year, unless more favourable collective agreement provisions (certain collective agreements reduce this contingent to 130 or 180 hours). Beyond the contingent, the employer must obtain prior Works Council opinion and the employee benefits from a mandatory rest compensation (COR).

In 2024, according to URSSAF, nearly 4.2 million private sector employees exceeded conventional contingent hours, an increase of 8 points compared to 2022.

Maximum Working Hours

The legislature strictly regulates overruns:

• Maximum daily duration: 10 hours (exemptions possible up to 12 hours by agreement or labour inspection authorisation).

• Absolute maximum weekly duration: 48 hours over an isolated week.

• Average maximum weekly duration: 44 hours over 12 consecutive weeks.

Any unjustified overrun exposes the employer to criminal penalties (5th class offence, i.e. €1,500 per affected employee) and to damages payment in case of employment tribunal litigation.

---

Calculating Increases: Statutory and Collective Rates

Statutory Increase Rates

Article L3121-36 of the Labour Code sets minimum increase rates:

• 25% for the first 8 overtime hours (from the 36th to the 43rd hour inclusive).

• 50% from the 9th overtime hour onwards (from the 44th hour onwards).

A company or sector agreement may provide for a lower increase rate, but never below 10% (legal minimum from the Act of 20 August 2008).

Concrete Calculation Example:

An employee whose gross hourly wage is €18 works 42 hours in the week.

• Normal hours (35h): 35 × 18 = €630

• Overtime hours with 25% increase (7h): 7 × 18 × 1.25 = €157.50

• Weekly gross salary: €787.50

Replacement with Rest Compensation

The employer may, with a collective agreement or failing that with employee agreement, replace all or part of overtime payment with equivalent rest compensation (RCE). This mechanism is particularly used in highly seasonal sectors (hospitality, catering, construction).

Since the Social Security Financing Act for 2024, the combination of rest compensation and tax exemption is only possible if the agreement is formalised in writing, which reinforces the importance of rigorous HR documentation.

Tax and Social Exemption: the "Tepa" Scheme

Stemming from the TEPA Act of 21 August 2007 and continued by the 2016 Labour Act, the exemption scheme remains in force in 2026:

• Income tax exemption within a limit of €7,500 per year of remuneration paid for overtime hours (Article 81 quater of the General Tax Code).

• Employee contribution reduction: 11.31% flat deduction on overtime remuneration (rate updated 1 January 2026).

• Employer contribution reduction: applicable only in companies with fewer than 20 employees (€1.50 per overtime hour).

These tax advantages largely explain the growth in recourse to declared overtime observed since 2018.

---

Document Management for Overtime: Issues and Modernisation

Recording and Traceability Obligations

Article L3171-4 of the Labour Code requires the employer to maintain a working time control document for each employee whose working time is not collectively organised. In case of litigation, the burden of proof lies with the employer: they must be able to produce signed hour records or data extracted from the clocking system.

The Court of Cassation has confirmed on several occasions (Cass. Soc. 18 March 2020, no. 18-10.919) that the absence of precise count places a presumption of unpaid overtime hours on the employer.

Electronic Signature Applied to HR Documents

Formalisation of overtime hours — whether amendments to employment contracts, recovery agreements, payslips or hour records — can now rely on electronic signature in the enterprise. This approach offers several advantages:

• Certified timestamping: each electronically signed document bears a reliable time stamp, essential in case of dispute over approval date of hours.

• Complete traceability: the audit log retains the identity of the signatory, their IP address, the device used and the hash of the original document.

• Reduced delays: signing an amendment remotely takes on average 4 minutes versus 3 to 5 days by post, according to sector benchmarks published by the National Digital Council (2025).

To explore the differences between signature levels (simple, advanced, qualified), consult our comprehensive electronic signature guide.

Integration with Payroll and HRIS Software

Modernising overtime management also involves integrating signature solutions into HRIS (Silae, PayFit, Sage, ADP). Open APIs allow automatically triggering a signature request as soon as an hour counter exceeds the statutory threshold, thus guaranteeing compliance without manual intervention. Our ROI calculator lets you assess potential savings from this automation in your structure.

---

2025-2026 Trends: Why Overtime Hours Are Growing

Macroeconomic and Sector Factors

Several dynamics explain the rise in declared overtime hours in France:

• Labour market tension: in logistics, healthcare and IT sectors, the rate of vacant posts exceeds 5% (source: Pôle Emploi, 2025 report). Rather than recruiting, many SMEs prefer to resort to overtime, deemed more flexible.

• Maintained tax advantage: the stability of the TEPA scheme since 2018 has anchored overtime as a variable remuneration lever, particularly for workers and employees with low marginal tax rates.

• Tertiarisation and work hybridisation: remote work creates blurred boundaries between work time and personal time, leading to under-reporting or over-reporting depending on sectors, which complicates URSSAF controls.

Drift Risks and URSSAF Audits

URSSAF adjustments related to overtime increased 18% between 2023 and 2025 (source: URSSAF Annual Report 2025). The most frequent reasons:

• Increases calculated on an incorrect hourly basis (exclusion of integrated bonuses from salary).

• Annual contingent exceeded without labour inspection notification.

• Exemptions incorrectly applied to hours unjustified by signed records.

Adopting an eIDAS-compliant electronic signature solution constitutes an effective safeguard against these risks, making document evidence unassailable.

Legislative Perspectives

The full employment bill, under parliamentary discussion in spring 2026, plans to experiment with a contingent increase to 270 hours in companies with fewer than 50 employees in sectors facing tension. If adopted, this scheme will further heighten the need for traceability and digital formalisation of individual agreements.

Legal Framework Applicable to Overtime Hours

Foundational Work Law Texts

The regulation of overtime in France rests on several legislative and regulatory texts that must be mastered:

• Articles L3121-28 to L3121-41 of the Labour Code: define legal duration, contingent, minimum increases and replacement with rest compensation modalities.

• Article L3171-4 of the Labour Code: imposes the obligation of individual working time count.

• Article 81 quater of the General Tax Code: sets the tax exemption within a limit of €7,500 annually.

• Decree No. 2008-1132 of 4 November 2008: specifies the application modalities of the employer contribution reduction.

Probative Value of Formalisation Documents

Any amendment, recovery agreement or overtime record constitutes a legal act capable of serving as evidence in court. Its evidential value depends on its integrity and certain identification of signatories.

eIDAS Regulation No. 910/2014 (and its eIDAS 2.0 revision in force since 2024) establishes three electronic signature levels:

• Simple: sufficient for most common HR documents.

• Advanced: recommended for salary amendments and recovery agreements, as it guarantees signatory identity and document integrity.

• Qualified: mandatory for certain authentic acts; rarely required in routine employment law.

The Civil Code, Articles 1366 and 1367, recognise the full probative force of electronic writing when the person from whom it emanates can be properly identified and the document's integrity is assured.

Personal Data Protection

Overtime records contain personal data within the meaning of GDPR Regulation No. 2016/679: name, employee identifier, actual working time. As such:

• Retention duration must be defined (generally 5 years in employment law, employment tribunal limitation period).

• Hosting must meet data location requirements (EU servers or adequate country under European Commission decision).

• Any electronic signature service provider processing this data is a controller within the meaning of Article 28 GDPR and must be subject to a DPA (Data Processing Agreement).

Legal Risks in Case of Non-Compliance

• URSSAF penalties: 5% late payment increases + 0.20% monthly interest.

• Employment tribunal litigation: condemnation to pay non-increased hours + damages for concealed work (6 months minimum salary, Article L8223-1 of the Labour Code).

• Criminal penalties: €1,500 fine per employee for non-compliance with maximum durations (5th class offence).

Usage Scenarios: Digitalising Overtime Management

Scenario 1 — An Industrial SME with 80 Production Employees

An industrial sector SME employing 80 production operators must regularly activate overtime during peak orders. Previously, hour records were printed, hand-signed by team leaders and archived in physical files. In case of URSSAF inspection, retrieving a document from 3 years prior took an average of 2 hours per file.

After deploying an electronic signature solution integrated with its payroll software, the company automatically generates a weekly record per employee, sent for signature in under 2 minutes. Documents are archived with certified timestamps and instantly retrievable. Result: 90% reduction in administrative time linked to overtime and zero adjustments in the last two URSSAF audits, versus a €12,000 adjustment detected under the old system.

Scenario 2 — A Group of Private Clinics with Approximately 400 Beds

A private hospital clinic group managing several establishments and approximately 400 beds faces strong pressures: high nursing staff turnover, emergency schedule changes, and traceability requirements imposed by the national collective agreement for private healthcare facilities. Schedule modification amendments required physical signature, generating delays incompatible with necessary reactivity.

Adopting an eIDAS-compliant advanced electronic signature now allows formalising any amendment related to overtime in under 10 minutes, including for staff on night shifts or between sites. The rate of documents signed within regulatory deadlines rose from 64% to 98% in six months, eliminating litigation risks on night and Sunday hour increases.

Scenario 3 — An Accounting Firm Managing 150 Payroll Files

An accounting firm handling payroll for 150 SMEs notices that seasonality (fiscal closures, year-end holidays) generates a quarterly spike in overtime among its clients. These clients transmitted records by unsecured email or post, causing calculation errors and processing delays.

By integrating an electronic signature workflow into its service offering, the firm enables clients to validate hour records directly from their smartphone. Data is automatically imported into payroll software. Data entry errors dropped 35% and average processing time for payslips including overtime was reduced from 4.5 days to 1.2 days, according to internal measurements over two consecutive financial years.

Conclusion

Overtime hours are both a performance lever for companies and a minefield on the legal and social front. Mastering legal calculation, respecting contingents, correctly applying increases and tax exemptions, and above all formalising each agreement in writing are the sine qua non conditions for compliant and trouble-free management.

Digitalising these processes — notably via electronic signature — is no longer optional but a necessity for HR teams facing growing volumes of documents with evidential value. It reduces costs, accelerates deadlines and secures each document against potential audit or litigation.

Certyneo supports you in this transformation with an eIDAS-compliant electronic signature solution, designed for HR teams and accountants. Discover our offers and start free today.