Overtime: Remuneration and Legal Calculation

Overtime is one of the most sensitive subjects in French labor law. Each year, labor inspectorates record thousands of violations related to incorrect application of remuneration rules or miscounting of working time. Yet the Labor Code is precise: once an employee exceeds the legal duration of 35 hours per week, mandatory surcharges apply. In this article, we examine in detail the regime applicable to overtime hours — their definition, calculation, surcharge rates, the annual contingent and the social and tax exemptions in force — so that you can manage your business in full compliance.

Definition and triggering of overtime hours

What is an overtime hour?

According to article L3121-28 of the Labor Code, overtime hours are all hours of work performed beyond the legal weekly duration set at 35 hours. This legal duration is calculated over the calendar week, which runs from Monday at 0:00 to Sunday at 24:00, unless a collective agreement provides for another organization.

It is important to distinguish overtime hours from supplementary hours, which concern exclusively part-time employees working beyond the duration provided in their contract, without exceeding 35 hours. The confusion between these two concepts is frequent and can lead to litigation at the labor courts.

Who decides on overtime?

Overtime hours are performed at the employer's request, whether explicit or implicit. An employee cannot, in principle, impose overtime on themselves and then claim remuneration for it — unless the employer was aware of it and did not object (constant case law of the Court of Cassation, notably Cass. soc. May 5, 2021, n°19-14.295).

The burden of proof for overtime rests on a shared evidentiary regime: the employee must support their claim with sufficiently precise elements (badge records, late emails, schedules) and the employer must respond with their own elements controlling working time.

Calculation of overtime and surcharge rates

The legal surcharge rates

In the absence of a collective agreement or company agreement providing for more favorable provisions, the applicable legal surcharge rates are as follows (article L3121-36 of the Labor Code):

• 25% for the first 8 overtime hours worked in the week (from the 36th to the 43rd hour)

• 50% for hours worked beyond (from the 44th hour onwards)

A collective agreement or sector agreement may lower the rate of the first tranche to 10% minimum, but can never provide a lower rate.

How to calculate remuneration in practice?

Calculation is based on the gross hourly rate of the employee. For an employee paid on a monthly basis, the hourly rate is calculated as follows:

Hourly rate = Gross monthly salary ÷ (Reference monthly duration in hours)

The reference monthly duration for a full-time employee at 35 h/week is 151.67 hours (35 h × 52 weeks ÷ 12 months).

Concrete example: An employee receives 2,500 € gross per month. Their hourly rate is 2,500 ÷ 151.67 = 16.48 € gross/hour. If they work 4 overtime hours in the week:

• 4 × 16.48 × 1.25 = 82.40 € gross surcharge due.

Replacement of surcharge by compensatory rest

Article L3121-33 of the Labor Code allows, subject to a collective agreement, to replace all or part of the payment of overtime hours (and the associated surcharge) with a replacement compensatory rest (RCR). This rest must be taken within 12 months following the opening of the right and cannot be unilaterally imposed by the employer without a collective agreement.

The annual overtime contingent

Definition and legal threshold

The annual contingent represents the volume of overtime hours that the employer can have its employees work without having to request authorization from the labor inspectorate, but while still complying with the obligation to inform the CSE (Social and Economic Committee). In the absence of a collective agreement, the legal reference contingent is fixed by decree at 220 hours per year per employee (article D3121-24 of the Labor Code).

A sector or company agreement can modify this contingent upwards or downwards. In certain sectors (construction, hospitality-catering), it can reach 300 to 400 hours.

Beyond the contingent: mandatory compensatory rest (COR)

Any overtime hour worked beyond the annual contingent gives the employee the right to compensatory rest (COR). This compensation is fixed at:

• 50% of overtime hours worked beyond the contingent in companies with 20 employees or fewer

• 100% in companies with more than 20 employees

The omission of COR exposes the employer to significant labor court sanctions, as it is treated as supplementary remuneration due as of right.

To effectively manage time tracking and the dematerialization of associated HR documents, HR electronic signature solutions make it possible to secure amendments to employment contracts and work time modulation agreements.

Tax and social exemptions: the Fillon/TEPA scheme

Income tax exemption

Since the law of August 21, 2007 (the so-called TEPA law), reaffirmed and strengthened by the law of August 16, 2022 (law providing emergency measures to protect purchasing power), remuneration paid for overtime hours benefits from an income tax exemption capped at €7,500 per year (article 81 quater of the General Tax Code).

This exemption applies to the gross remuneration of overtime hours, including the surcharge. It is automatic and requires no special action on the part of the employee.

Reduction of employee contributions

In parallel, employees benefit from a reduction in employee contributions on overtime hours, calculated at the rate of 11.31% (as of January 1, 2024) on the gross remuneration of these hours, within the limit of old-age insurance contributions due. This reduction can represent a significant net financial advantage for employees.

Employer contribution deduction

On the employer's side, an employer contribution deduction also applies, subject to conditions. For companies with fewer than 20 employees, this deduction is fixed at €1.50 per overtime hour worked. For companies with 20 employees or more, the deduction has been eliminated since 2012.

These exemption mechanisms imply rigorous traceability of hours worked. Payslips must distinctly mention overtime hours and their increased remuneration, making it essential to have a reliable working time management system. The dematerialization of payslips and associated documents, governed by the complete guide to electronic signature, can greatly simplify this management.

Employer obligations and risks in case of non-compliance

The obligation to record working time

Article L3171-4 of the Labor Code requires every employer to put in place a system for recording the duration of work of each employee. This obligation has been strengthened since the CJEU ruling of May 14, 2019 (case C-55/18, CCOO v. Deutsche Bank), which requires a system that is objective, reliable and accessible to measure daily working time.

The absence of such a system constitutes an infraction noted by the labor inspectorate and can lead to:

• Administrative fines that can reach €1,500 per affected employee

• The requalification of work organization with wage recovery over 3 years

• Damages at labor court in case of individual dispute

Maximum durations not to exceed

Independently of overtime, the employer must ensure compliance with the maximum working durations provided for by the Labor Code:

• 10 hours per day (with possible waivers up to 12 hours)

• 48 hours per week (absolute maximum)

• 44 hours on average over a period of 12 consecutive weeks

Non-compliance with these thresholds exposes the employer to criminal sanctions (class 4 infraction, i.e., €1,500 per employee and per violation).

Collective agreements and flexibility in work organization

Collective bargaining agreements or company agreements play a central role in modulating the rules relating to overtime. The Labor Law of August 8, 2016 established the primacy of the company agreement over the sector agreement in many areas, including the surcharge rate for overtime (floor of 10%), the annual contingent and the compensatory rest regime.

The negotiation and signing of such company agreements requires a formalized process. Electronic signature in business offers a secure solution for concluding these collective agreements in compliance with legal requirements, with probative value recognized before labor courts.

Legal framework applicable to overtime

The legal regime of overtime in France is based on a dense normative corpus, at several levels.

Labor Code:

• Article L3121-28: definition of overtime hours (hours worked beyond the legal duration of 35 hours)

• Article L3121-33: possibility of replacing payment with replacement compensatory rest, under collective agreement

• Article L3121-36: legal surcharge rates (25% and 50%)

• Article L3121-30: annual contingent of overtime hours

• Articles D3121-24: setting of the legal contingent at 220 hours by decree

• Article L3171-4: obligation to record working time

• Articles L3121-37 to L3121-40: mandatory compensatory rest beyond the contingent

General Tax Code:

• Article 81 quater of the GTC: income tax exemption on overtime remuneration, limited to €7,500 per year, resulting from the law of August 21, 2007 and confirmed by the law of August 16, 2022

Social Security Code:

• Article L241-17 and following: reduction of employee contributions on overtime hours at the rate of 11.31% (as of January 1, 2024)

• Employer contribution deduction of €1.50/hour for companies with fewer than 20 employees

European and national case law:

• CJEU, May 14, 2019, C-55/18 (CCOO v. Deutsche Bank): obligation for every employer to establish an objective and reliable system for recording daily working time

• Court of Cassation, labor chamber, May 5, 2021, n°19-14.295: shared burden of proof regarding overtime hours

Employer obligations and risks: Any failure to pay or calculate overtime constitutes hidden work fraud (article L8221-5 of the Labor Code) if intentionality is established, punishable by 3 years imprisonment and €45,000 fine. The limitation period for wage recovery is 3 years (article L3245-1 of the Labor Code). Employee representatives and union delegates have a specific alert right in case of exceeding the annual contingent, and the CSE must be consulted before any recourse to overtime beyond this contingent.

Concrete use scenarios

Scenario 1: An industrial SME in production peak

An SME in the manufacturing sector with approximately 80 employees faces an exceptional order requiring a temporary increase in pace over 6 weeks. The company decides to resort to overtime for 40 operators, at the rate of 6 overtime hours per week per employee.

Calculation: 6 hours × 25% surcharge × 6 weeks = 36 overtime hours increased per employee over the period. On the basis of an average gross hourly rate of 14 €, the additional cost per employee is 36 × 14 × 1.25 = 630 € gross. For 40 employees: 25,200 € gross in additional labor costs.

Thanks to the employer contribution deduction (€1.50 × 36 hours × 40 employees = 2,160 €) and the exemption from employee contributions, the SME achieves a net savings of approximately 15 to 20% on these remuneration compared to temporary hiring. The temporary work schedule modification amendments are signed electronically, reducing the time needed to collect signatures from 5 days to less than 24 hours.

Scenario 2: An accounting firm during tax season

An accounting firm with 25 employees experiences each year an intense workload increase between March and June (year-end closing, tax filings). Employees regularly work between 8 and 12 overtime hours per week during this period.

The firm, which negotiated a substitution agreement with its employee representatives, opts for replacement compensatory rest (RCR) rather than immediate payment. Accountants recover 3 to 4 days of rest in July-August, a quiet period for the firm. This arrangement allows the firm to save an immediate cash flow estimated at €35,000 per fiscal year while retaining its teams with an in-kind benefit valued. RCR agreements are formalized and signed via a qualified electronic signature solution, ensuring their enforceability in case of labor court dispute.

Scenario 3: A logistics company managing a tight contingent

A logistics company with approximately 150 employees, of which 90 are drivers and handlers, approaches each year the threshold of 200 overtime hours per employee (out of 220 authorized) during the holiday periods. To avoid exceeding the contingent and the associated mandatory compensatory rest (COR) — which would represent 100% of hours exceeding the contingent for a company of this size — the HR manager implements a real-time monitoring dashboard.

When an employee approaches 200 hours, the system automatically alerts the manager to redistribute the workload. This rigorous monitoring, coupled with the dematerialization of schedules and time modulation documents through tools compliant with the requirements of the eIDAS 2.0 regulation, allows the company to avoid an estimated cost of 18,000 € in COR over the fiscal year, while remaining in compliance with CSE information obligations.

Conclusion

The overtime regime in France is both protective for employees and constraining for employers. Mastering the calculation of surcharge rates (25% and 50%), respecting the annual contingent of 220 hours, exploiting available tax and social exemptions, and rigorously formalizing collective agreements are imperatives that condition your company's compliance with labor law.

Dematerialization plays an increasing role in managing these obligations: amendments, compensatory rest agreements, time tracking documents — all these acts can be signed and archived securely and enforceably. Certyneo supports you in this transformation with an eIDAS-compliant electronic signature solution, specially designed for the needs of HR and legal teams.

Ready to secure your HR processes? Discover Certyneo's offerings and begin dematerializing your working time management documents today.