Overtime: Legal Increase and Calculation

Introduction: why master the overtime regime?

Overtime is one of the most sensitive topics in French labour law. Between calculating mandatory premiums, respecting the regulatory annual limit and the social and tax exemptions resulting from the TEPA law, each error can be costly for the employer. In 2025, the DIRECCTE (now DREETS) noted that disputes related to overtime represent nearly 22% of employment tribunal claims. This article guides you step by step through the legal rules, calculation methods and best practices for formalising agreements in full compliance, notably through electronic signature in the workplace.

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The legal framework for overtime in France

Definition and legal trigger

According to article L. 3121-28 of the French Labour Code, overtime comprises all hours worked beyond the legal weekly duration set at 35 hours. For full-time employees subject to a collective schedule regime, counting is carried out on a weekly basis (from Monday 00:00 to Sunday 24:00).

Some collective agreements may provide for a different reference duration via a work time modulation or annualisation agreement (articles L. 3121-41 to L. 3121-47). In this case, overtime is calculated at the end of the period, based on the conventional annual duration (often 1,607 hours).

Employer's order and employee's agreement

The performance of overtime depends on an explicit or implicit request from the employer. The Court of Cassation (Soc., 14 November 2018, n°17-16.025) reminds us that hours worked at the sole initiative of the employee, without a request or tolerance from the employer, cannot be classified as overtime. However, the burden of proof for the completion of hours rests with the employee (time sheets, time clocks, emails), whilst the employer must produce contradictory evidence.

The annual regulatory limit

Article L. 3121-30 of the French Labour Code sets an annual overtime limit at 220 hours per employee in the absence of a collective agreement. A company or industry agreement may adjust this threshold upwards or downwards. Beyond the limit:

• The employer must consult the CSE (Social and Economic Committee).

• The employee is entitled to a compulsory rest compensation (COR) equal to 50% of hours exceeding the limit for companies with 20 employees or fewer, and 100% beyond.

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Legal premium rates: how to apply them?

Minimum rates set by law

Article L. 3121-36 of the French Labour Code provides, in the absence of a collective agreement, the following premiums:

| Hours concerned | Premium rate | |---|---| | 1st to 8th overtime hour (H36 to H43) | 25% | | From the 9th overtime hour (H44 and beyond) | 50% |

A company or industry agreement may set a different rate, provided it is not less than 10% (art. L. 3121-33). This flexibility allows SMEs to negotiate a rate of 15% or 20%, while remaining above the legal minimum.

Practical calculation method

The gross hourly basic salary serves as a reference. For an employee whose gross monthly salary is €2,500:

• Gross hourly rate: €2,500 ÷ 151.67 h = €16.48/h

• 25% premium (H36 to H43): 16.48 × 1.25 = €20.60/h

• 50% premium (H44 and +): 16.48 × 1.50 = €24.72/h

The monthly reference duration of 151.67 hours corresponds to 35 h × 52 weeks ÷ 12 months.

Replacement of premium with compensatory rest

Article L. 3121-33 of the French Labour Code permits, subject to a collective agreement or, failing that, an individual agreement, the replacement of payment of paid overtime with a compensatory rest in replacement (RCR). This rest is then granted within a maximum period of 18 months following the opening of the right (art. D. 3121-18). The formalisation of this individual agreement benefits from being carried out via electronic signature for HR to guarantee traceability and probative value.

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Tax and social exemptions: the TEPA regime and its developments

The exemption scheme in force

Stemming from the law of 21 August 2007 (the "TEPA law") and consolidated by law no. 2018-1213 of 24 December 2018, the exemption scheme allows:

• Exemption from income tax for the employee on overtime remuneration, limited to €7,500 per year (art. 81 quater of the French General Tax Code).

• Reduction of employee contributions: flat deduction of €1.50 per overtime hour for all employees.

• Flat employer deduction: for companies with fewer than 20 employees, reduction of €0.50 per overtime hour on employer contributions.

Employer's declarative obligations

The employer must declare overtime hours exempted via the Nominative Social Declaration (DSN), by distinguishing on the pay slip:

• The number of overtime hours worked.

• The corresponding gross remuneration before exemption.

• The amount of reduced contributions.

Failure to declare or an error in the DSN line may expose the employer to a social security authority adjustment, with unpaid contributions due along with late payment penalties (art. R. 243-18 of the French Social Security Code).

Special case of day-based agreements

Employees under a fixed annual day agreement (art. L. 3121-58 and following) are not subject to the overtime regime in the strict sense. Their "excess days" beyond the conventional limit (often 218 days) may, however, benefit from a premium if a collective agreement provides for it. The Court of Cassation (Soc., 26 September 2012, n°11-14.540) reminds us that any fixed day clause without an effective work time control mechanism is null and void.

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Formalisation and traceability: the contribution of electronic signature for HR amendments

Why sign amendments related to overtime electronically?

The multiplication of individual agreements (RCR, hour agreements, modulation amendments) generates considerable documentary volume. Signing these documents on paper lengthens delays, complicates archiving and weakens evidence in case of dispute. Qualified electronic signature compliant with eIDAS offers probative value equivalent to handwritten signature (art. 1367 of the French Civil Code) and guarantees document integrity.

Integration into HR processes

A platform like Certyneo enables automation of amendment transmission and signature as soon as the employee exceeds the conventional limit, centralises proof of consent and generates an auditable timestamp trail. HR departments thus reduce the time for signing amendments from 5 to 7 working days (paper process) to less than 24 hours on average. To compare the solutions available on the market, consult our comparison of electronic signature solutions.

Legal retention and archiving

Article L. 3243-4 of the French Labour Code requires retention of pay slips for 5 years; individual amendments relating to overtime follow the same rule. Electronic archiving with probative value — compliant with the NF Z 42-026 standard and the eIDAS regulation — guarantees enforceability of documents in case of social security authority inspection or employment tribunal claim. The complete guide to electronic signature details the technical requirements to be met for legally secure archiving.

Legal framework applicable to overtime and its formalisation

Provisions of the French Labour Code

The overtime regime is governed by articles L. 3121-28 to L. 3121-48 of the French Labour Code, which establish the legal reference duration (35 weekly hours), minimum premium rates (25% then 50%), the regulatory annual limit (220 hours in the absence of an agreement) and the arrangements for compulsory rest compensation. Articles D. 3121-14 to D. 3121-18 specify the associated regulatory thresholds and deadlines.

Tax and social exemptions

Article 81 quater of the French General Tax Code provides for income tax exemption limited to €7,500 annually. Contribution reductions are provided for in article L. 241-18 of the French Social Security Code, as amended by law no. 2018-1213 of 24 December 2018. Failure to comply with these provisions exposes the employer to a social security authority adjustment with application of late payment penalties provided for in article R. 243-18 of the same code.

Probative value of electronically signed documents

Article 1366 of the French Civil Code states that "electronic writing has the same probative force as writing on paper". Article 1367 specifies the conditions for the reliability of the signature process, referring to the eIDAS regulation no. 910/2014 of the European Parliament and Council. This regulation distinguishes three levels of signature: simple, advanced (complying with the requirements of articles 26 and following) and qualified (based on a qualified certificate issued by an approved trust service provider, known as QTSP).

Personal data protection

Collection and processing of data relating to working time (time clocks, time sheets) constitute personal data processing subject to the GDPR regulation no. 2016/679. The employer, as a data controller, must provide a legal basis (legal obligation, art. 6(1)(c)), inform employees (art. 13) and respect retention periods. The use of an SaaS electronic signature solution implies the conclusion of a data processing agreement compliant with article 28 of the GDPR.

Technical standards

Advanced and qualified electronic signatures are based on standards ETSI EN 319 132 (XAdES), ETSI EN 319 122 (CAdES) and ETSI EN 319 162 (PAdES) for PDF formats. Compliance with these standards ensures interoperability and long-term verifiability of signatures affixed to HR amendments.

Legal risks in case of non-compliance

An amendment relating to overtime not formalised or for which proof of consent cannot be provided may be reclassified, opening entitlement to back pay claims, damages for undeclared work (art. L. 8221-5 of the French Labour Code) and criminal penalties up to €45,000 fine and 3 years' imprisonment for legal entities.

Use cases: overtime and electronic signature in practice

Scenario 1 — An industrial SME with 80 employees at peak production

An SME in the manufacturing sector employs 80 operators subject to significant seasonal variations. Each quarter, about fifty employees exceed the 220-hour annual limit, requiring the conclusion of individual amendments providing for compensatory rest in replacement. Previously managed on paper, these documents took on average 6 days to be signed, delaying payroll calculation.

Since the deployment of an advanced electronic signature solution, amendments are generated automatically from the HRIS as soon as the threshold is triggered, sent by mobile notification and signed in less than 4 hours. The estimated time saving represents 85% reduction in administrative delay, equivalent to savings of approximately 2 FTE/month on the HR function according to ranges observed in ANDRH 2024 sector reports.

Scenario 2 — An accounting firm managing payroll for 150 very small client businesses

An accounting firm centralises payroll processing for approximately 150 very small businesses, representing over 900 monthly pay slips. Verification of declared overtime hours and transmission of signed amendments to the correct contacts was a major friction point: lost documents, insufficient signatures, validation delays.

By integrating an advanced electronic signature flow directly into its payroll software, the firm reduced the document follow-up rate by 70% and halved the average amendment validation time. The timestamped and electronically archived documents also made it possible to successfully defend two employment tribunal cases related to contested overtime payment claims.

Scenario 3 — A distribution group with 400 employees on shift schedules

A food distribution group employs 400 employees across multiple sites with shift schedules and frequent replacements generating numerous weekly overtime hours. DSN compliance required precisely declaring each exempted hour; any error triggered social security authority alerts.

By deploying an electronic signature workflow coupled with a time management tool, managers validate hours at the end of the week from their tablet, the employee electronically signs the monthly summary and data is automatically transmitted to the DSN module. The rate of declarative anomalies fell from 8% to less than 1% within six months, significantly reducing the risk of social security authority adjustment.

Conclusion

The overtime regime in France is based on a precise balance: legal premium rates (25% then 50%), respect of the 220-hour annual limit, tax and social exemptions conditional on rigorous declaration, and formalisation of individual agreements whose proof must be irrefutable. Each step can become a source of dispute if administrative processes are not properly managed.

Qualified electronic signature provides a concrete answer to this challenge: traceability, timestamping, legal archiving and probative value compliant with the French Civil Code and the eIDAS regulation. For HR departments, accountants and SME leaders, it is a lever for compliance as much as for productivity.

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