Overtime: increase and legal calculation

Introduction: why master the overtime regime?

Overtime is one of the most recurring topics in French employment law. Whether it is seasonal activity peaks, urgent projects or temporary staff shortages, almost all companies resort to it at some point. Nevertheless, the rules for calculation, increase and compensation remain poorly understood, exposing employers to significant litigation risks. This article presents the complete legal framework applicable in 2026: definition, annual limit, legal increase rates, tax and social contribution exemptions, as well as the documentary obligations imposed on the employer.

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What is overtime? Legal definition

The legal threshold for triggering

In French law, any hour of work performed beyond the legal weekly working time of 35 hours for full-time employees is considered overtime (article L. 3121-28 of the Labour Code). This threshold is assessed in principle on the calendar week (from Monday 0:00 to Sunday 24:00), unless there is an agreement for annualisation or flexible working time arrangements.

For employees subject to a work time arrangement agreement over a period longer than a week, overtime is counted at the end of the reference period, after offsetting high weeks and low weeks.

Overtime in collective agreements

The law sets a minimum floor, but collective bargaining agreements or company agreements may modify the triggering threshold or the calculation methods — provided they are not less favourable to the employee overall. It is therefore essential to consult the applicable collective agreement before any implementation. For secure documentary management of these agreements, electronic signature in the workplace simplifies the formalisation and archiving of collective amendments.

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Calculating overtime: method and increase rates

The legal increase rate

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

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

• 50% for hours worked beyond the 43rd hour

A company or sector agreement may set a different rate, but this cannot in any case be less than 10% (legal floor since the law of 20 August 2008).

Calculation example: An employee whose gross hourly salary is €15 works 46 hours in the week, i.e. 11 hours of overtime.

• Hours 36 to 43 (8 h): €15 × 1.25 × 8 = €150

• Hours 44 to 46 (3 h): €15 × 1.50 × 3 = €67.50

• Total increase: €217.50 (instead of €165 without increase)

Recovery in compensatory rest time

Instead of increased payment, a collective agreement may provide for compensatory rest time (RCR): the employee then receives rest time equivalent to the remuneration plus the increase. One hour of overtime increased by 25% thus entitles the employee to 1 hour 15 minutes of rest. This mechanism is popular in sectors where schedule management is complex. The Certyneo HR solution enables you to paperless requests and approvals for compensatory rest, with timestamped traceability that is compliant.

The annual overtime limit

The annual limit is the maximum volume of overtime a salaried employee can work in a calendar year. It is set at 220 hours per year by the Labour Code (article D. 3121-24), but can be modified by collective agreement — upwards or downwards.

Beyond the limit, the employer must:

• Inform and consult the Social and Economic Committee (CSE) before resorting to it;

• Grant a mandatory rest counterparty (COR): 50% of hours worked beyond the limit in companies with fewer than 20 employees, 100% in companies with 20 or more employees.

Failure to comply with these obligations exposes the employer to civil sanctions (salary recovery, damages) and criminal penalties (4th-class offence).

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Tax and social exemptions: the "overtime" scheme in 2026

Income tax exemption

Since the law n° 2007-1223 of 21 August 2007 (TEPA law), strengthened by the law of 16 August 2022 known as "purchasing power", remuneration paid for overtime and additional hours is exempt from income tax up to a limit of €7,500 per year (2026 limit unchanged, to be verified in supplementary tax law).

This exemption is automatic: the employer has no particular formalities to perform, except to correctly identify and declare the sums concerned in the Declarative Social Nominative (DSN).

Reduction of employee social contributions

Parallel to the tax exemption, employees benefit from a reduction in employee social contributions on overtime, within the limit of basic old-age insurance contributions. This reduction is calculated by URSSAF using a standard rate published each year. For 2026, the applicable rate remains 11.31% (subject to the annual URSSAF order).

Lump-sum deduction of employer contributions

Employers with fewer than 20 employees benefit from a lump-sum deduction of €1.50 per hour of overtime worked, in respect of employer contributions. This deduction also applies in companies with 20 to fewer than 250 employees for hours worked beyond the collective working time when this is less than 35 hours.

All of these provisions require rigorous and traceable management of hours worked. A comprehensive guide to electronic signature can help you understand how to paperless your HR documents — amended pay slips, amendments to employment contracts — with full probative value.

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Employer obligations: monitoring, information and formalities

Recording working time

Article L. 3171-2 of the Labour Code requires every employer to keep a document to monitor working time for employees whose working time is not predetermined. This document must show the start and end time of each working period, or the duration of each period. It must be kept for 1 year and made available to the labour inspector.

In the event of an inspection or labour court proceedings, the absence of this document systematically works against the employer: the Court of Cassation considers that the burden of proof of actual working time rests with the employer (Cass. soc., 18 March 2020, no. 18-10.919).

Employee information and CSE consultation

The employer must:

• Inform each employee of the volume of overtime worked and rest rights acquired (via the pay slip or an attached document);

• Consult the CSE before exceeding the annual limit and, generally, whenever there is a significant change in the organisation of working time;

• Declare in DSN overtime hours and exempted amounts, failing which URSSAF may issue adjustments.

To facilitate the signature and archiving of documents related to working time (amendments, flexibility agreements, RCR request forms), tools such as the Certyneo AI-powered contract generator allow you to produce compliant documents in just a few minutes, ready to be signed electronically.

Overtime and daily rate agreements: a separate scheme

Employees subject to a daily rate agreement (autonomous executives, article L. 3121-58 of the Labour Code) are not subject to the provisions relating to overtime. Their working time is counted in days rather than hours. Exceeding the rate is governed by specific rules (buyback of rest days, mandatory amendment). Any attempt to requalify an invalid daily rate agreement into overtime can result in significant salary recovery — a risk that companies must anticipate with their legal advisers. The Certyneo solution dedicated to law firms supports legal professionals in securing their acts and advice.

Legal framework applicable to overtime

The overtime regime in France rests on a structured legislative and regulatory framework that every employer must master to protect themselves against litigation risks.

Labour Code — fundamental provisions:

• Article L. 3121-27: legal duration of actual working time set at 35 hours per calendar week.

• Articles L. 3121-28 to L. 3121-39: definition, triggering, increase and compensatory rest for overtime.

• Articles D. 3121-24 to D. 3121-26: regulatory annual limit of 220 hours and mandatory rest counterparty.

• Article L. 3171-2: obligation to record working time and keep documents for one year.

• Article L. 3121-58 and following: daily rate agreement scheme, distinct from overtime.

Tax and social texts:

• Law n° 2007-1223 of 21 August 2007 (TEPA law): introduction of income tax exemption and reduction of employee social contributions on overtime.

• Law n° 2022-1158 of 16 August 2022 known as "purchasing power": increase in the tax exemption ceiling to €7,500 and extension of the scheme.

• Article L. 241-18 of the Social Security Code: lump-sum deduction of employer contributions of €1.50 per hour of overtime for employers with fewer than 20 employees.

• URSSAF 2026 instructions: lump-sum reduction rate of employee contributions set at 11.31%.

Key case law:

• Cass. soc., 18 March 2020, no. 18-10.919: reversal of burden of proof in favour of employee in the absence of employer record-keeping.

• Cass. soc., 14 November 2018, no. 17-16.747: reminder that the judge may award salary recovery even in the absence of proof of explicit employer agreement, provided the employer was aware of the hours worked.

Risks in case of non-compliance: Failure to comply with overtime rules exposes the employer to: (1) salary recovery with damages for harm suffered; (2) URSSAF adjustments on evaded contributions; (3) 4th-class offences (€1,500 per employee concerned, €3,000 in case of recidivism) for failure to comply with maximum working times; (4) nullity of contractual clauses contrary to public social order. Rigorous record-keeping, secure storage and electronic signature of records are essential safeguards in the event of an inspection or legal proceedings.

Use scenarios: managing overtime in practice

Scenario 1 — Industrial SME with seasonal peaks

An industrial SME of around 80 employees, specialising in the manufacture of mechanical components, faces orders that double between September and December. The company regularly resorts to 6 to 8 hours of overtime per employee per week during this period. Before implementing a paperless monitoring tool, the management of overtime vouchers was manual: Excel files, paper signatures, validation delays. The risk of labour court proceedings was real, particularly on the calculation of increases applicable to the 44th hour.

By adopting an electronic signature solution integrated into its payroll software, the SME was able to:

• Reduce by 70% the time to validate overtime (from 5 days to an average of 1.5 days);

• Establish timestamped and incontestable evidence of each employee/employer agreement;

• Reliably transmit data to DSN without re-entry.

Scenario 2 — Restructuring consulting firm (fewer than 20 employees)

A consulting firm specialising in organisational restructuring with around 15 executive staff members, most of whom are on daily rate agreements, also employs 4 assistants subject to the 35-hour week. During a compliance audit, it emerged that overtime for these assistants was not formalised, that the weekly count was not kept and that the lump-sum employer deductions of €1.50 per hour were not being applied.

Regularisation involved:

• Implementation of a digital register to record working time with weekly electronic validation;

• Drafting and signature of individual amendments specifying the terms for resorting to overtime;

• Retrospective recovery of the lump-sum deduction, representing approximately €1,800 annual savings on employer contributions.

Scenario 3 — Healthcare grouping with medical staff

A private hospital grouping of intermediate size (around 350 beds) encounters recurring difficulties in managing overtime for nurses and healthcare assistants, subject to specific collective agreements (National Collective Agreement for private hospitalisation). The conventional increase rates differ from legal rates, and the annual limit is adjusted by sector agreement.

Implementation of a paperless workflow enabled:

• Automatic application of conventional rates (20% instead of 25% for the first 8 hours, in accordance with the CCN);

• Alerting managers as soon as the conventional limit for an employee is reached, preventing undeclared overages;

• Reduction of payroll errors by 45% on variable items, according to the organisation's internal HR indicators.

Conclusion

Overtime is subject to a precise legal framework that the employer cannot afford to ignore: legal or conventional increase rates, annual limit, mandatory rest counterparty, tax and social exemptions, counting and DSN declaration obligations. In 2026, strengthened labour inspectorate controls and case law favourable to employees in matters of proof make impeccable documentary management essential.

Certyneo enables you to paperless all documents related to working time management — amendments, compensatory rest agreements, validation forms — with a probative value compliant with the eIDAS regulation. Discover our solutions tailored to your sector or calculate the return on investment of electronic signature for your organisation. Ready to take the plunge? Contact our team for a personalised demonstration.