Overtime: increase and legal calculation

Introduction: why overtime remains a key issue in 2026

Overtime is one of the most frequently debated subjects in French labour law. Between legal obligations, annual quotas, increase rates and administrative formalities, employers must navigate a precise regulatory framework or risk significant sanctions. In 2026, with the generalisation of HR document digitalisation, the question of traceability of hours worked and their validation takes on a new dimension. This article guides you step by step through the legal calculation of overtime, applicable increases, the annual quota and good documentary practices to secure your time management.

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Definition and triggering of overtime

What is an overtime hour?

According to article L.3121-28 of the French Labour Code, an overtime hour constitutes any hour worked beyond the legal weekly working period, fixed at 35 hours for full-time employees. This threshold is assessed on a weekly basis (from Monday 00:00 to Sunday 24:00), unless a company agreement provides for another reference period.

Several cumulative conditions must be met:

• The employee must be subject to a full-time contract;

• The hours must be worked at the employer's request, or at least with his tacit consent;

• The hours must exceed the legal or conventional threshold applicable.

It should be noted that for employees on a day-based contract, the overtime regime does not apply directly — they are subject to a separate system for tracking the number of days worked.

The annual overtime quota

The annual quota is the maximum volume of overtime hours that an employee can work in a calendar year. Set by collective agreement or, failing that, by decree, it is currently 220 hours per employee per year in the absence of a sectoral or company agreement (article D.3121-24 of the French Labour Code).

Beyond this quota, the employer may still resort to overtime, but only after consultation with the CSE (Social and Economic Committee) and subject to compliance with mandatory compensatory rest (COR), calculated at 100% of excess time for companies with more than 20 employees, and 50% for those with 20 employees or fewer (article L.3121-38).

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Calculation of overtime and legal increase rates

Applicable legal rates in the absence of an agreement

In the absence of a collective agreement or extended sectoral agreement or company agreement, overtime is increased according to the following rates, defined in article L.3121-36 of the French Labour Code:

| Hours concerned | Legal increase rate | |---|---| | First 8 overtime hours (36th to 43rd hour) | 25% | | From the 9th overtime hour (44th hour and beyond) | 50% |

These rates apply to the employee's gross hourly basic salary. The salary thus increased is entirely subject to social contributions and income tax, subject to exemptions in force (see below).

Conventional rates: a frequent derogation

A sectoral or company agreement may set increase rates lower than the legal rate, but with a non-negotiable floor set at 10% (article L.3121-33 of the French Labour Code). In practice, many collective agreements provide for differentiated rates — for example 25% for the first 4 overtime hours then 50%, or a uniform rate of 25% for all hours in certain sectors.

It is therefore imperative to consult the applicable collective agreement for the company before mechanically applying legal rates.

Concrete calculation example

An employee receives a basic salary of €12 gross/hour and works 40 hours in the week (i.e. 5 overtime hours).

• Normal hours (35h): 35 × 12 = €420

• 5 overtime hours at +25%: 5 × 12 × 1.25 = €75

• Total weekly gross: €495

If these 5 hours fall beyond the 43rd hour (e.g.: 46 hours worked), the overtime hours from the 44th to the 46th hour would be increased at 50%:

• 8h at +25%: 8 × 12 × 1.25 = €120

• 3h at +50%: 3 × 12 × 1.50 = €54

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Tax and social exemptions for overtime

The TEPA law and its successive amendments

Since the law of 21 August 2007, known as the "TEPA law", overtime has benefited from a favourable tax and social regime, renewed and strengthened by the law of 24 December 2018 on urgent economic and social measures. In 2026, this scheme remains in force:

• Exemption from income tax: the remuneration of overtime is exempt from income tax up to €7,500 per year (article 81 quater of the General Tax Code);

• Reduction in employee contributions: employees benefit from a flat deduction of 11.31% (updated rate 2025-2026) on basic old-age insurance contributions;

• Flat-rate employer deduction: employers with fewer than 20 employees benefit from a deduction of €1.50 per overtime hour.

These benefits apply to legally worked overtime, which presupposes irreproachable traceability: signed hour records, detailed payslips, documented individual or collective agreements.

Replacement of increase by compensatory rest

Article L.3121-33 of the French Labour Code allows, subject to conventional conditions, the replacement of all or part of the salary increase by equivalent compensatory rest. This rest, known as "replacement compensatory rest" (RCR), must be taken within the deadlines provided for in the agreement and appear on the payslip. In this case, overtime hours replaced by rest do not count towards the annual quota.

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Employer documentary obligations: traceability and digitalisation

Time tracking: a legal obligation

The judgment of the Court of Justice of the European Union of 14 May 2019 (case C-55/18, CCOO v Deutsche Bank) confirmed the obligation for employers to establish an objective, reliable and accessible system for measuring the daily working time of each employee. In France, this obligation applies regardless of company size.

Tracking documents can take different forms: paper time sheets, badging software, biometric time tracking systems or digital HR tools. Whatever solution is chosen, the data must be retained for 3 years (article L.3171-3 of the French Labour Code) and be communicable to the labour inspectorate on request.

Digitalisation of HR documents: a compliance lever

Digitalised management of overtime — amendments to contracts, signed time summaries, agreements to waive rest days — is becoming standard practice in modern HR departments. The electronic signature solution for HR makes it possible to validate these documents in seconds, while guaranteeing their evidential value before employment tribunals.

For companies wishing to understand the foundations of this approach, the comprehensive guide to electronic signature is an essential starting point. Documents relating to overtime — weekly summaries, temporary amendments, compensatory rest certificates — should be electronically signed to guarantee their enforceability.

Sanctions for non-compliance

Failure to comply with overtime regulations exposes the employer to several types of sanctions:

• Fines: up to €1,500 per employee concerned (€4,500 in case of repeat offence) for failure to comply with the quota or failure to pay the increase;

• Back pay: the employee may claim up to 3 years of back pay before the Employment Tribunal;

• URSSAF adjustment: in the event of reclassification of undeclared hours, unpaid social contributions may be claimed with late payment increases.

The establishment of a rigorous tracking system, combined with electronic signature of HR documents compliant with the eIDAS Regulation, is the best protection against these risks.

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Special cases and derogatory schemes

Employees on an annual day-based contract

Managers and certain non-managers subject to an annual day-based contract (article L.3121-58 of the French Labour Code) are not subject to the classic overtime regime. Their working time is counted in days rather than hours. However, they may benefit from a day buyback mechanism (JRTT) beyond the quota, with an increase of at least 10% provided for in the quota agreement.

Part-time work and supplementary hours

For part-time employees, these are not "overtime hours" but supplementary hours that apply. They are capped at 10% of the contracted duration (or 1/3 with collective agreement) and increased by 10% up to the tenth, then by 25% beyond. This separate regime deserves careful attention when drafting part-time contracts — the AI-powered contract generator from Certyneo can help you produce compliant documents incorporating these specific clauses.

Annualisation of working time

When a collective agreement provides for modulation or annualisation of working time, overtime is no longer calculated on a weekly basis but at the end of the annual reference period. Only hours worked beyond 1,607 hours in the year then constitute overtime, which can significantly alter the calculation of increases and the quota.

Legal framework applicable to overtime

The overtime regime is based on a dense legislative and regulatory foundation, articulated between the Labour Code, the tax provisions of the General Tax Code and European case law.

Labour Code — Main provisions:

• Article L.3121-28: definition of overtime as any hour worked beyond 35 weekly hours;

• Article L.3121-33: possibility of replacing salary increase with equivalent compensatory rest and regulation of conventional rates (floor of 10%);

• Article L.3121-36: legal increase rates (25% for the first 8 hours, 50% beyond);

• Article L.3121-38: mandatory compensatory rest (COR) for hours worked beyond the quota;

• Article D.3121-24: setting the regulatory annual quota at 220 hours;

• Article L.3171-3: obligation to retain time tracking documents for 3 years;

• Article L.3121-58 et seq: regime for annual day-based contracts.

General Tax Code:

• Article 81 quater of the General Tax Code: exemption from income tax up to €7,500 per year on overtime remuneration.

European case law:

• CJEU, 14 May 2019, case C-55/18 (CCOO v Deutsche Bank SAE): obligation for Member States to require employers to have an objective, reliable and accessible system for measuring daily working time. This ruling strengthened traceability obligations in France and throughout the EU.

Evidential value of digitalised HR documents: Documents relating to overtime (amendments, summaries, waiver agreements) may be validly signed electronically in accordance with Regulation (EU) No 910/2014 eIDAS, which recognises the legal value of electronic signature in all Member States. Article 25 of the Regulation provides that a qualified electronic signature has legal effect equivalent to a handwritten signature. For common HR documents, an advanced electronic signature (eIDAS level 2) is generally sufficient.

Article 1366 of the Civil Code provides that "an electronic document has the same probative force as a document on paper, provided that the person from whom it emanates can be duly identified and that it is established and retained in conditions such as to guarantee its integrity". Article 1367 specifies the conditions for validity of the electronic signature under domestic law.

Finally, as regards the processing of data linked to time tracking, Regulation (EU) 2016/679 (GDPR) requires employers to base this processing on a legal basis (legal obligation or legitimate interest), to inform employees and to limit data retention to the strictly necessary period.

Usage scenarios: managing overtime in practice

Scenario 1 — Industrial SME with seasonal activity peaks

An industrial SME with approximately 80 employees experiences significant activity increases at the end of the year, generating an average of 12 to 15 weekly overtime hours per operator over 6 consecutive weeks. Previously managed manually via paper sheets, validation of hours by team leaders took approximately 2 additional working days per pay cycle, with an estimated data entry error rate of 8%.

After deploying a digital HR tool coupled with an electronic signature solution to validate weekly summaries, validation time fell to less than 4 hours. The data entry error rate dropped to less than 1%, and document traceability made it possible to respond within 24 hours to an URSSAF inspection covering 3 previous financial years. The time saving on pay preparation is estimated at 30% per cycle, according to sectoral benchmarks from HR software publishers.

Scenario 2 — Engineering consulting firm with mixed contract employees

An engineering consulting firm employing 45 consultants, of which 30 are on day-based contracts and 15 on standard contracts, faced recurring confusion between overtime and quota overrun days in its payroll documents. This situation generated recurring employment tribunal disputes, with an average cost of €3,500 per contentious file (legal fees + back pay).

By structuring its contractual documents — quota amendments, JRTT buyback summaries, rest certificates — using standardised templates and traceable electronic signature, the firm reduced the number of employee disputes by 70% in 18 months. The clarity of electronically signed documents, time-stamped and archived, proved decisive in contentious proceedings before the Employment Tribunal.

Scenario 3 — Medical and social care association with complex scheduling

A medical and social care association employing approximately 250 employees in shift work (nurses, care assistants, administrative staff) had to manage overtime over annualised reference periods, in accordance with its sectoral agreement. Calculating the thresholds triggering overtime at the end of the period — from 1,607 hours — required tedious manual reconciliation of time and attendance data.

The integration of digital time tracking, with automatic generation of annual summaries and electronic signature of summary documents by the employee and the HR representative, made it possible to reduce the end-of-period processing time from 5 days to less than 24 hours. The reliability of the data also facilitated the declaration of TEPA exemptions, avoiding adjustments estimated at several thousand euros in previous financial years.

Conclusion

Overtime is an essential flexibility lever for businesses, but its management requires absolute rigour: precise calculation of increases, compliance with the annual quota, document traceability and application of tax and social exemptions in accordance with the rules. In 2026, digitalisation of HR processes is no longer an option but a necessity to guarantee compliance and protect yourself in case of dispute.

Certyneo supports HR teams in securing their documents: amendments, hour summaries, compensation agreements — all electronically signed, time-stamped and archived with legal value compliant with the eIDAS Regulation. Gain efficiency and peace of mind: discover our pricing and get started free on Certyneo.