Overtime: Remuneration and Legal Calculation

Overtime is one of the most sensitive subjects in French labour law. Every year, the labour inspection identifies thousands of breaches related to incorrect application of remuneration rules or incorrect counting of working time. Yet the Labour Code is precise: as soon as an employee exceeds the legal duration of 35 hours per week, mandatory increases apply. In this article, we examine in detail the regime applicable to overtime — its definition, its calculation, the rates of increase, 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

What is overtime?

According to article L3121-28 of the Labour Code, overtime constitutes all hours of work carried out beyond the legal weekly duration set at 35 hours. This legal duration is calculated over the calendar week, which begins on Monday at 0:00 and ends on Sunday at 24:00, unless a collective agreement provides for another organisation.

It is important to distinguish overtime from complementary hours, which concern exclusively part-time employees working beyond the duration provided for in their contract, without exceeding 35 hours. The confusion between these two concepts is frequent and can lead to disputes before the employment tribunal.

Who decides on overtime?

Overtime is carried out at the request of the employer, whether explicit or implicit. An employee cannot, in principle, impose overtime on themselves and then claim remuneration for it — unless the employer knew about it and did not object to it (consistent case law of the Court of Cassation, in particular Cass. soc. 5 May 2021, No. 19-14.295).

The proof of overtime is based on a shared evidential regime: the employee must support their claim with sufficiently precise elements (clocking records, late emails, schedules) and the employer must respond with their own elements of monitoring working time.

Calculation of overtime and increase rates

Legal increase rates

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

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

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

A collective agreement or sectoral agreement may reduce the rate of the first bracket to a minimum of 10 %, but can never provide for a lower rate.

How to calculate remuneration in practice?

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

Hourly rate = Monthly gross salary ÷ (Monthly reference duration in hours)

The monthly reference duration for a full-time employee on 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 hours of overtime in the week:

• 4 × 16.48 × 1.25 = 82.40 € gross of increase due.

Replacement of increase by compensatory rest

Article L3121-33 of the Labour Code allows, subject to a collective agreement, to replace all or part of the payment of overtime hours (and the associated increase) by 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 authorisation from the labour inspection, but still respecting the obligation to inform the 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 Labour Code).

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

Beyond the contingent: the mandatory compensatory rest

Any overtime hour worked beyond the annual contingent gives rise, for the employee, to mandatory compensatory rest. This compensation is set 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 compensatory rest exposes the employer to significant employment tribunal penalties, as it is assimilated to additional remuneration due as of right.

To effectively manage the monitoring of working time and the dematerialisation of associated HR documents, HR electronic signature solutions allow you to secure amendments to employment contracts and working time modulation agreements.

Tax and social exemptions: the Fillon/TEPA scheme

Income tax exemption

Since the law of 21 August 2007 (the so-called TEPA law), reaffirmed and strengthened by the law of 16 August 2022 (law on emergency measures to protect purchasing power), remuneration paid for overtime work benefits from an exemption from income tax 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 increase. It is automatic and requires no specific action by 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 1 January 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 benefit for employees.

Flat-rate employer contribution deduction

On the employer's side, a flat-rate deduction of employer contributions also applies, subject to conditions. For companies with fewer than 20 employees, this deduction is fixed at 1.50 € per hour of overtime worked. For companies with 20 employees and more, the deduction has been removed since 2012.

These exemption mechanisms imply rigorous traceability of hours worked. Pay slips must separately mention overtime hours and their increased remuneration, which makes a reliable working time management system essential. The dematerialisation of pay slips and associated documents, governed by the complete guide to electronic signature, can significantly simplify this management.

Employer obligations and risks in case of non-compliance

The obligation to count working time

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

The absence of such a system constitutes a breach noted by the labour inspection and can lead to:

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

• The requalification of work organisation with salary recovery over 3 years

• Damages and interest before the employment tribunal 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 in the Labour Code:

• 10 hours per day (with possible exemptions 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 penalties (4th class misdemeanour, i.e. 1,500 € per employee and per breach).

Collective agreements and flexibility in work organisation

Sectoral or company collective agreements play a central role in modulating the rules relating to overtime. The Labour Law of 8 August 2016 established the primacy of company agreements over sectoral agreements in many areas, including the rate of overtime increases (floor of 10 %), the annual contingent and the compensatory rest regime.

The negotiation and signing of such company agreements requires a formalised process. Electronic signature in the company offers a secure solution for concluding these collective agreements in compliance with legal requirements, with probative value recognised before labour courts.

Legal framework applicable to overtime

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

Labour Code:

• Article L3121-28: definition of overtime (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 rates of increase (25 % and 50 %)

• Article L3121-30: annual overtime contingent

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

• Article L3171-4: obligation to count working time

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

General Tax Code:

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

Social Security Code:

• Article L241-17 et seq.: reduction in employee contributions on overtime hours at the rate of 11.31 % (as of 1 January 2024)

• Flat-rate employer contribution deduction of 1.50 €/hour for companies with fewer than 20 employees

European and national case law:

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

• Court of Cassation, social chamber, 5 May 2021, No. 19-14.295: shared evidential regime in overtime matters

Obligations and risks for the employer: Any failure to pay or calculate overtime constitutes an offence of concealed work (article L8221-5 of the Labour Code) if intentionality is established, subject to 3 years' imprisonment and a fine of 45,000 €. The prescription period for salary recovery is 3 years (article L3245-1 of the Labour Code). Staff representatives and union delegates have a specific right of alert in case of exceeding the annual contingent, and the Social and Economic Committee must be consulted before any recourse to overtime beyond this contingent.

Concrete usage scenarios

Scenario 1: A small/medium-sized industrial enterprise at peak production

A small/medium-sized enterprise 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 hours of overtime per week and per employee.

Calculation: 6 hours × 25 % increase × 6 weeks = 36 hours of overtime with increase 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 additional labour cost.

Thanks to the flat-rate employer contribution deduction (1.50 € × 36 hours × 40 employees = 2,160 €) and the exemption from employee contributions, the small/medium-sized enterprise achieves a net saving of approximately 15 to 20 % on these remuneration compared to temporary recruitment. Amendments for temporary modification of work pace are signed electronically, reducing the time for collecting signatures from 5 days to less than 24 hours.

Scenario 2: An accounting firm during tax season

An accounting firm with 25 employees experiences intense work overload each year between March and June (year-end closures, tax returns). Employees regularly work between 8 and 12 hours of overtime per week over this period.

The firm, which has 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 immediate cash flow estimated at 35,000 € per financial year while retaining its teams through a valued benefit in kind. RCR agreements are formalised and signed via a qualified electronic signature solution, guaranteeing their enforceability in case of employment tribunal dispute.

Scenario 3: A logistics company managing a tight contingent

A logistics company with approximately 150 employees, of which 90 are drivers and handling staff, approaches each year the threshold of 200 hours of overtime per employee (out of the 220 authorised) during 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 real-time monitoring dashboards.

When an employee approaches 200 hours, the system automatically alerts the manager to redistribute the workload. This rigorous monitoring, coupled with the dematerialisation of schedules and working time modulation documents via tools compliant with the requirements of eIDAS Regulation 2.0, allows the company to avoid an additional cost estimated at 18,000 € in COR over the financial year, while remaining in compliance with the obligations to inform the Social and Economic Committee.

Conclusion

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

Dematerialisation plays an increasingly important role in managing these obligations: amendments, compensatory rest agreements, working time monitoring documents — all these documents can be signed and archived in a secure and enforceable manner. 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 offers and start dematerialising your working time management documents today.