Overtime: Calculation, Increase and Legal Obligations

Introduction

Overtime is one of the most sensitive issues in French employment law. Each year, thousands of employment tribunal cases concern their calculation, remuneration or lack of formalisation. Yet the applicable rules are precise: the Labour Code sets out a structured legal framework, supplemented by industry or company agreements that can modify certain parameters. This article guides you through overtime calculation, legal pay increase rates, annual allowances, mandatory compensation and formalisation procedures — of which electronic signature for HR is today an essential lever for compliance and traceability.

Definition and Triggering of Overtime

What is Overtime?

In French law, overtime is any hour of actual work carried out beyond the legal weekly working time of 35 hours (Article L. 3121-28 of the Labour Code). This definition requires two important clarifications:

• The triggering threshold is weekly, not monthly or annual.

• Only actual work is counted: unpaid breaks, dressing time not contractually integrated or ordinary commuting are excluded.

For employees under a forfeit arrangement in hours per week or month, overtime is any hours exceeding the agreed forfeit. For employees under an annual day forfeit, the regime is entirely different (rest days, renunciation of RTT) and classic overtime does not apply.

Who can Request Overtime?

Only the employer can request or authorise overtime. The employee cannot carry it out on their own initiative and then claim payment — unless they demonstrate that the employer was aware of it and did not object (consistent case law from the Court of Cassation, notably Cass. soc. 9 March 2022, no.20-16.992).

The employer, conversely, can impose overtime within the annual allowance without obtaining the employee's consent, provided they respect maximum working hours.

Calculating Overtime: Legal Pay Increase Rates

Legal Rates in the Absence of an Agreement

Article L. 3121-36 of the Labour Code sets out the default pay increase rates:

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

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

Concretely, if an employee receives a gross hourly salary of €15 and works 10 hours overtime in the week:

• 8 hours at €15 × 1.25 = €150

• 2 hours at €15 × 1.50 = €45

• Total overtime: €195

These increases apply to the basic hourly rate, without including variable bonuses (performance bonus, exceptional bonus). However, fixed and permanent remuneration elements (seniority, contractual allowances set monthly) may be integrated according to contractual clauses.

Modulation by Collective Agreement

An industry or company agreement can lower the pay increase rate, but never below 10% (Article L. 3121-33 of the Labour Code). This is the absolute floor: no agreement, even unanimous, can go below this threshold.

Similarly, an agreement can:

• Replace all or part of the increased payment with an equivalent rest day (called "recovery")

• Modify the triggering threshold within the framework of annual working time modulation

• Set a different annual overtime allowance from the legal allowance

For companies without a union representative, an agreement with the social and economic committee (SEC) can also amend these rules, within the limits provided by law.

Annual Overtime Allowance

Legal Allowance: 220 Hours

In the absence of a collective agreement, the annual overtime allowance is set at 220 hours per employee by decree (Article D. 3121-24 of the Labour Code). This allowance represents the volume of overtime the employer can unilaterally impose each calendar year.

Beyond this allowance, overtime remains possible but requires:

• Prior notification to the SEC (former CHSCT or employee delegates)

• A mandatory rest compensation (MRC) equal to 50% of hours worked outside the allowance in companies with 20 employees or fewer, and 100% in companies with more than 20 employees.

This rest compensation is in addition to the pay increase: it is not an alternative, unless otherwise agreed.

Impact on HR Management and Traceability

Following the allowance requires rigorous counting of hours worked. The employer must implement a reliable system for recording working time (obligation reinforced by European case law CJEU, judgment Federación de Servicios de Comisiones Obreras of 14 May 2019, C-55/18).

In this context, dematerialisation of HR documents — amendment for modification of working time, recovery agreement, validation of time records — makes full sense. Electronic signature for HR documents allows you to retain evidence of employee agreement on their calculations, which is crucial in the event of employment tribunal proceedings.

Replacement of Payment by Rest Compensation

Rest Compensation for Replacement (RCR)

A collective agreement may provide that overtime, including increases, is entirely compensated by rest rather than paid. This mechanism, known as rest compensation for replacement (RCR), is popular in certain sectors for its flexibility.

Example: 2 hours of overtime at 25% increase = 2.5 hours of rest acquired. The employee recovers 2h30 instead of receiving increased payment.

Note: RCR is not to be confused with mandatory rest compensation (MRC) applicable beyond the allowance. The two may accumulate.

Implementation Conditions

• Existence of a collective agreement (or, failing that, agreement with the SEC for companies without union representatives)

• Individual notification of the employee of their acquired rights (payslip or attached document)

• Taking of rest within a maximum period of 2 months from the opening of the right (Article D. 3121-18)

• In the event of contract termination before use of rest, payment of compensation allowance

Formalisation of these agreements is essential. For further information on dematerialisation of company agreements, the complete guide to electronic signature provides valuable insights on the probative value of digitally signed documents.

Maximum Working Hours and Absolute Limits

Absolute Limits

Even with a collective agreement or employee consent, certain maximum hours can never be exceeded (Articles L. 3121-18 to L. 3121-25 of the Labour Code):

| Period | Maximum Duration | |---|---| | Per Day | 10 hours (unless waived by prefect) | | Per Week | 48 hours | | Over 12 Consecutive Weeks | 44 hours on average |

These limits apply even in case of peak activity, urgent orders or replacement of absent employees. Their exceeding exposes the employer to criminal sanctions (fine of €1,500 per affected employee, increased to €3,000 in the event of recidivism) and reclassification of hours as illegal work.

Employees Excluded from Overtime Rules

Certain categories of employees are not subject to the classic regime:

• Senior managers (within the meaning of Article L. 3111-2): no limit on duration or overtime obligation

• Employees on annual day forfeit: working day regime, without hourly calculation

• VRP and certain home workers: special regimes

For companies managing multiple regimes simultaneously, electronic signature in the workplace facilitates differentiated management of contractual amendments according to each employee's status, with complete audit trail.

Legal Framework Applicable to Overtime

Founding Texts of the Labour Code

The overtime regime is principally codified in Articles L. 3121-28 to L. 3121-48 and D. 3121-17 to D. 3121-24 of the French Labour Code, issued from the Act no.2008-789 of 20 August 2008 on the renewal of social democracy, profoundly amended by the Macron ordinances of 22 September 2017 (ordinances no.2017-1385 to 2017-1388).

Key Texts to Know:

• Article L. 3121-28: definition of overtime

• Article L. 3121-33: legal pay increase rates and modulation by agreement

• Article L. 3121-36: rates of 25% and 50% in the absence of agreement

• Article L. 3121-30: annual allowance and conditions for exceeding

• Article D. 3121-24: setting of legal allowance at 220 hours

• Articles L. 3121-38 to L. 3121-48: forfeit regime in hours and days

Employer Obligations

The employer is subject to several cumulative obligations:

• Individual calculation of working time: obligation reinforced by the CJEU (judgment C-55/18 of 14 May 2019) imposing an objective, reliable and accessible system for measuring daily working time for each employee.

• Mention on the payslip: overtime and their increases must appear separately on the payslip (Article R. 3243-1 of the Labour Code).

• Consultation of the SEC: mandatory before resorting to overtime outside the allowance, and when negotiating agreements amending working time.

• Individual notification of rights to rest compensation (mandatory rest compensation and rest compensation for replacement).

Sanctions and Litigation Risks

• Criminal Sanctions: fine of €1,500 per employee in breach (€3,000 in recidivism) for exceeding maximum hours.

• Employment Tribunal Risk: in the absence of written evidence, the burden of proof is shared (Cass. soc. 18 March 2020, no.18-10.919): the employee must provide sufficiently precise elements, the employer must respond with their own elements. Without a rigorous calculation system, the employer is in a disadvantageous position.

• URSSAF Recovery: non-paid increases are reclassified as concealed wages, exposing the company to recovery of social contributions over 3 years with 25% surcharge.

• Nullity of Contractual Clauses contrary to public policy provisions (rates below 10%, suppression of MRC).

Digital formalisation of agreements (electronically validated time records, amendments signed via an eIDAS-compliant platform) is the best protection against these risks, providing time-stamped and unfalsifiable evidence of the parties' agreement.

Use Cases: Formalisation of Overtime

Scenario 1 — An Industrial SME of 80 Employees at Peak Production

An SME in the manufacturing sector employs 80 production operators. At the end of the year, an urgent order requires 6 weeks of intensive production. The company authorises up to 6 hours of overtime per week for 40 employees, totalling 1,440 hours of overtime over the period.

Without a digital validation system, the HR manager collects paper time sheets, validates them by hand and transmits them to payroll — a process that generates on average 3 to 4 days of processing and exposes the company to disputes in case of document loss.

By deploying a digital validation tool with electronic signature for HR, each weekly record is validated by the employee and their manager in less than 2 minutes. HR processing is reduced by 65%, and each validation is time-stamped and archived for 5 years — the legal retention period for payroll documents.

Scenario 2 — An Accounting Firm Managing 150 Client Files

During peak periods (March-April and September-October), an accounting firm with 25 employees regularly exceeds the 35-hour weekly threshold. Employees average 8 to 12 hours of overtime per week during these periods, which rapidly brings them close to the annual allowance of 220 hours.

The firm has negotiated an agreement with its SEC allowing 50% of increases to be replaced by rest compensation. For this agreement to be enforceable, each individual amendment must be signed by the employee. By using an eIDAS-compliant electronic signature solution, the firm obtains signatures from all its employees in less than 24 hours, versus 5 to 7 days with the previous paper process. The time saving on HR administration is estimated at 3 man-days per period.

Scenario 3 — An IT Services Provider with Remote Working Teams

An IT services company of around 200 consultants, 70% of whom work remotely on client sites, encounters difficulties in calculating and formalising overtime. Consultants enter their hours in a project management tool, but managerial validation and employee agreement on monthly calculation were not formalised.

After an internal audit revealing employment tribunal risk over 18 months of uncontested payslips, the company integrates an electronic validation workflow: each month-end, the hours summary is sent to the employee for simple electronic signature, then counter-signed by the manager. In case of disagreement, an alert circuit is automatically triggered. Result: 98% of calculations validated within 48 hours, zero employment tribunal dispute over the following period. The ROI calculator from Certyneo allows you to precisely evaluate the savings achieved on this type of process.

Conclusion

Overtime is subject to a precise legal framework that every employer must master: pay increase rates of 25% and 50%, annual allowance of 220 hours, mandatory rest compensation, absolute maximum hours. Failure to understand these rules exposes the company to criminal sanctions, URSSAF recovery and costly employment tribunal disputes.

But beyond compliance, it is traceability that makes the difference: a digitally signed, time-stamped and archived calculation is the best defence in case of dispute. Certyneo allows you to formalise hours validation, amendments and recovery agreements with maximum probative value, directly from your HR tool.

Discover how Certyneo simplifies HR document management in full compliance — request a free demonstration or consult our pricing to find the offer suited to your organisation.