Overtime: Increase and Legal Calculation

Introduction

Overtime is one of the most sensitive topics in French labour law. If mishandled, it exposes employers to URSSAF adjustments, labour court disputes and significant tax penalties. In 2026, the legal framework remains primarily rooted in the Labour Code, but recent developments—particularly on tax exemption and the annual cap—deserve special attention. This article reviews the rules for calculating overtime, mandatory surcharge rates, the statutory annual cap, applicable exemptions and tools for compliant and dematerialised management.

---

Legal definition of overtime

According to article L. 3121-28 of the Labour Code, all hours of work performed beyond the legal weekly duration of 35 hours constitute overtime. This definition applies to employees under the standard legal regime, working full-time, subject to specific collective agreement provisions.

Scope and exclusions

The overtime regime does not apply to:

• senior managers (article L. 3111-2 of the Labour Code), who are subject neither to the legal duration nor to the cap;

• employees whose working time is counted in daily or annual forfeit (article L. 3121-58 et seq.), for whom separate rules apply;

• part-time workers, whose hours worked beyond the contract but below 35 hours are classified as additional hours (article L. 3123-8).

For employees working under modulated or annualised time arrangements, overtime is calculated at the end of the reference period (generally the calendar year), by comparing total hours actually worked against the annual threshold corresponding to 35 hours per week, i.e. 1,607 hours per year (article L. 3121-41).

Concept of effective working time

Only actual working time counts, defined in article L. 3121-1 as "the time during which the employee is at the employer's disposal and complies with their instructions without being able to attend freely to personal matters". Breaks, meals, on-call time not activated, or ordinary home-to-work travel are in principle excluded, unless otherwise provided in a collective agreement.

---

Calculation of overtime and surcharge rates

The remuneration of overtime is subject to mandatory surcharge rules set out in articles L. 3121-33 et seq. of the Labour Code. These surcharges may be set by collective agreement, but may never be lower than the statutory minimum.

Legal surcharge rates

In the absence of a collective agreement, the legal surcharge rates are as follows:

| Overtime hours band | Minimum surcharge | |-----------------------------------|---------------------| | 1st to 8th hour (H36 to H43) | 25% | | Beyond 8th hour (H44+) | 50% |

These rates apply to the employee's basic hourly rate. All bonuses and benefits entering into the calculation basis of reference salary must be taken into account, in accordance with consistent case law from the Court of Cassation (notably Cass. soc., 11 January 2017, no. 15-23.341).

Example of calculation: An employee whose gross monthly salary is €2,500 for 151.67 monthly hours has a basic hourly rate of €16.48. If this employee works 4 hours of overtime within the first 8, their remuneration will be: 4 × 16.48 × 1.25 = €82.40 gross.

Collective agreement and surcharge adjustment

A sectoral or company agreement may set different surcharge rates, provided they do not fall below 10% (article L. 3121-33, II). Agreements in the construction, transport or hospitality sectors thus often provide for intermediate rates or specific thresholds. It is therefore essential to consult the applicable collective agreement before any implementation.

Replacement by compensatory rest

The employer may, under conditions, replace the payment of all or part of the overtime surcharge by compensatory rest (article L. 3121-33, I). This rest must be taken within a period set by agreement or, failing that, within twelve months following the opening of the right. Failure to take rest within this period does not extinguish the right: the employee retains their debt, which may be claimed in the event of contract termination.

---

The annual cap on overtime

The annual cap is the maximum volume of overtime an employee may work in a year without authorisation from the labour inspectorate. It constitutes a threshold triggering additional obligations for the employer.

Cap volume

In the absence of a collective agreement, the statutory cap is set at 220 hours per employee per year (article D. 3121-24 of the Labour Code). A collective agreement may increase or decrease it. Certain sectors (printing, media, food retail) have negotiated separate caps ranging from 130 to 360 hours.

Exceeding the cap and mandatory counterpart

Any overtime hour worked beyond the cap entitles the employee to a mandatory compensatory rest counterpart (COR), provided for in article L. 3121-38. In the absence of an agreement, this counterpart is:

• 50% of the time for hours exceeding the cap in companies with 20 or fewer employees;

• 100% in companies with more than 20 employees.

Non-compliance with this obligation exposes the employer to payment of damages calculated on the basis of the corresponding enhanced salary for rest owed (Cass. soc., 22 September 2021, no. 19-16.714).

Employee notification

The employer must inform employees of the opening of their right to compensatory rest by written document attached to the pay slip (article D. 3121-18). Omission of this information constitutes an irregularity liable to result in requalification and labour court conviction.

---

Tax and social exemptions in 2026

Since the TEPA law of 21 August 2007, reinforced by the "purchasing power" law of 16 August 2022 and maintained in 2026, overtime benefits from a favourable tax and social regime that makes it a significant net remuneration lever.

Income tax exemption

Remuneration received for overtime is exempt from income tax within an annual ceiling of €7,500 net (article 81 quater of the CGI, amended by the 2024 Finance Act). This exemption applies directly when filing the employee's tax return and must appear distinctly on the pay slip.

Reduction in employee contributions

Overtime is also subject to a fixed deduction of employee contributions (article L. 241-17 of the Social Security Code). The amount of this deduction is set by decree; for 2026, it stands at €1.50 per hour of overtime in companies with fewer than 20 employees and €0.50 in those with 20 or more employees.

Employer deduction for SMEs

Employers with fewer than 20 employees also benefit from a fixed employer deduction of €1.50 per hour of overtime (article L. 241-18 of the SSC). This deduction complements general contribution allowances, without being able to be cumulated beyond the amount of employer contributions actually due.

---

Management and traceability of overtime: compliance issues

Beyond calculation, proof of overtime constitutes a major litigation issue. Article L. 3171-4 of the Labour Code provides a shared evidential regime: the employee must provide sufficiently precise information about the unpaid hours they claim to have worked, so the employer can respond usefully.

Working time recording systems

The employer is required to implement an objective, reliable and accessible system for recording working time, in accordance with the CJEU ruling of 14 May 2019 (case C-55/18, CCOO v. Deutsche Bank). This ruling, progressively transposed into domestic law, requires member states to compel employers to have a system enabling the measurement of daily working time for each worker.

The solutions adopted may include: badge systems, electronically signed timesheets, time management tools integrated into HR information systems. For dispersed or remote teams, electronic signature for HR offers enhanced traceability of time record documents, amendments and recovery forms.

Dematerialisation of overtime-related documents

Overtime management generates substantial documentary flow: work orders, amendments to employment contracts authorising cap exceeding, recovery forms, rest replacement agreements. Dematerialising these documents via an eIDAS-compliant electronic signature solution makes it possible to:

• reduce validation periods (elimination of paper circuits);

• guarantee authenticity and integrity of signed documents;

• constitute a probative archive exploitable in the event of labour court dispute.

A comparison of electronic signature solutions available on the market can help HR teams select the tool best suited to their documentary volume and budget.

Pay slip and mandatory information

The pay slip must distinctly show (article R. 3243-1 of the Labour Code):

• the number of hours of overtime worked;

• the surcharge rate applied;

• the amount exempt from income tax;

• the amount of the deduction of employee and, where applicable, employer contributions.

The absence of these items exposes the employer to requalification and the obligation to reconstitute the employee's rights over the entire applicable limitation period (3 years for salaries, under article L. 3245-1).

For more information on HR process digitalisation, the complete guide to electronic signature from Certyneo details the signature levels suited to each type of HR document, from simple amendments to indefinite-term employment contracts.

Legal framework applicable to overtime

The overtime regime is part of a dense legal corpus, linking primary law, ordinary legislation and collective agreement law.

Labour Code — core provisions

• Article L. 3121-28: definition of overtime as hours worked beyond 35 hours per week.

• Articles L. 3121-33 et seq.: surcharge rates (25% for the first 8 hours, 50% beyond), possibility of replacement by compensatory rest, modulation by collective agreement (10% minimum).

• Article L. 3121-38: mandatory compensatory rest counterpart for hours exceeding the annual cap.

• Article D. 3121-24: statutory setting of the annual cap at 220 hours in the absence of an agreement.

• Article L. 3171-4: shared evidence regime for working time duration.

• Article L. 3245-1: three-year limitation period for salary claims.

• Article R. 3243-1: mandatory items on the pay slip.

Social Security Code

• Article L. 241-17: fixed deduction of employee contributions on overtime.

• Article L. 241-18: fixed employer deduction for companies with fewer than 20 employees.

General Tax Code

• Article 81 quater: income tax exemption up to €7,500 annually for overtime remuneration.

EU law

• Directive 2003/88/EC (working time): sets maximum working time limits (48 hours per week, 11 hours daily rest, 24 hours weekly rest), within which the overtime regime operates.

• CJEU ruling, 14 May 2019, C-55/18, CCOO v. Deutsche Bank: requires member states to compel employers to have an objective and reliable system for recording daily working time.

Dematerialisation and documentary compliance

When documents related to overtime (amendments, recovery agreements) are electronically signed, eIDAS Regulation no. 910/2014 (articles 25 and 26) guarantees their legal value equivalent to handwritten signature within the European Union, provided an advanced or qualified electronic signature is used. Civil Code, article 1366, enshrines in French law the probative value of electronic writing, subject to reliable identification of the signatory and document integrity.

Risks in case of non-compliance

Breaches of the overtime regime are subject to administrative penalties (DREETS notice), URSSAF adjustments with late payment increases (10 to 80%), and labour court convictions that may include damages, salary arrears and recalculated termination compensation. Concealed work (article L. 8221-5 of the Labour Code), including failure to declare overtime, is punishable by 3 years' imprisonment and €45,000 fine.

Usage scenarios: managing overtime in the workplace

Scenario 1 — Industrial SME with 80 employees in continuous production

An industrial SME employing approximately 80 employees in 3-shift production frequently resorts to overtime during order peaks. Before implementing a dematerialised system, work orders and recovery forms circulated in paper form, causing validation delays of 3 to 5 days and frequent document losses.

By adopting an eIDAS-compliant electronic signature solution for HR documents, the company cut average validation time to less than 4 hours, whilst building an automatic archive of each signed document. During a URSSAF inspection covering 24 months, all evidence of time recording and recovery agreements was able to be produced in under an hour, avoiding an estimated €35,000 adjustment.

Scenario 2 — Accounting firm managing payroll for 150 SME clients

An accounting firm managing outsourced payroll for 150 SME clients processed an average of 800 monthly pay slips mentioning overtime. The diversity of applicable collective agreements (construction, retail, transport) made manual calculation of surcharge rates very time-consuming and error-prone (incorrect rate in approximately 4% of pay slips, according to the firm's own internal audit).

Implementing an automated contract and amendment generation tool, coupled with an electronic signature solution, cut the calculation error rate to less than 0.5% and reduced average processing time per case by 22%. Hour change amendments are now electronically signed by the employee and employer in less than 24 hours.

Scenario 3 — Hospital group with approximately 1,200 staff

A medium-sized public hospital group managed overtime for non-medical staff under the provisions of decree no. 2002-598 relating to hourly compensation for additional work (IHTS). Traceability of hour overages relied on paper timesheets archived in departments, without reliable timestamping.

Facing several labour court disputes over proof of actual working time, the facility deployed an electronic time recording system with digital signing of timesheets. Result: a 60% reduction in overtime-related litigation in 18 months, and the ability to produce admissible evidence in 100% of processed cases. Certyneo's ROI calculator made it possible to estimate that savings generated on litigation and administrative management costs exceeded the cost of the solution in the first year.

Conclusion

The overtime regime rests on a precise legal structure: mandatory surcharge rates (25% and 50%), annual cap of 220 hours, mandatory compensatory rest counterpart, conditional tax and social exemptions. Each link in this chain requires flawless documentary traceability, both to meet legal obligations and to protect against adjustment and labour court risks.

Dematerialising HR documents related to overtime—amendments, recovery agreements, time record forms—via an eIDAS-compliant electronic signature solution is today one of the most effective answers to these compliance and evidence issues.

Certyneo supports HR and legal teams through this transition. Create your account free of charge and discover how to secure and accelerate your documentary processes today.