Overtime: Payroll Increase and Legal Calculation

Introduction: why master the overtime regime?

In France, overtime is one of the most frequent subjects of labor court disputes. In 2025, Dares recorded over 180,000 labor court cases related to working time, a significant portion of which concerned unpaid payroll increases or exceedances of the annual contingent. Yet the applicable rules are precise: the Labor Code sets legal rates, hourly thresholds and clear documentary obligations. This article guides you step-by-step through the legal calculation of overtime, mandatory payroll increase rates, the annual contingent and rights to compensatory rest, so that you are in full compliance with applicable legislation.

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Legal definition and triggering of overtime

According to article L. 3121-28 of the Labor Code, overtime comprises all hours worked beyond the legal weekly working duration, set at 35 hours for full-time employees (art. L. 3121-27 CT). This rule applies in companies that have not concluded a work schedule adjustment agreement over a longer reference period (modulation or annualization agreement).

Employees covered and exclusions

All employees on indefinite-term or fixed-term contracts, working full-time, are subject to this regime. By contrast, the following are excluded:

• Executive managers (art. L. 3111-2 CT), who are not subject to any working time duration.

• Employees on a day-based salary (art. L. 3121-58 CT), for whom the notion of overtime does not apply directly.

• Young apprentices benefit from specific rules (maximum duration reduced to 8 hours per week above 35 hours).

How does the employer trigger overtime?

The accomplishment of overtime requires an explicit or implicit request from the employer. The Court of Cassation has ruled on several occasions (Cass. Soc., 14 November 2018, n°17-16.828) that hours worked at the sole initiative of the employee, without the employer's knowledge or acceptance, do not necessarily entitle the employee to payroll increase. However, if the employer was able to ascertain these exceedances and did not object, its liability may be engaged.

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Legal payroll increase rates: 25% and 50%

Article L. 3121-36 of the Labor Code sets the payroll increase rates applicable in the absence of a collective agreement:

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

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

Possibility of derogation by collective agreement

A sector or company agreement may set different rates, provided that these are not less than 10% (art. L. 3121-33 CT). Thus, certain sectors such as construction or hospitality apply specific conventional rates. It is therefore imperative to check the collective agreement applicable to your company before proceeding with the calculation.

Concrete calculation example

Let us take an employee whose base salary is €2,100 gross per month for 151.67 hours (legal monthly basis).

• Gross hourly rate: 2,100 / 151.67 = €13.85/h

• 1 overtime hour at 25%: 13.85 × 1.25 = €17.31

• 1 overtime hour at 50%: 13.85 × 1.50 = €20.78

If this employee works 5 overtime hours during the week (all in the 25% bracket), the weekly gross supplement is 5 × 17.31 = €86.55.

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The annual contingent of overtime hours

Article L. 3121-30 of the Labor Code provides for an annual contingent of overtime hours beyond which additional rights are granted. In the absence of a collective agreement, this contingent is set at 220 hours per employee and per year (decree n°2002-622 of 25 April 2002).

Consequences of exceeding the contingent

Exceeding the contingent is possible, but it is subject to strict conditions:

• Prior consultation of the social and economic committee (CSE) (art. L. 3121-33 CT)

• Notification to the labor inspector

• Opening of a mandatory compensatory rest entitlement (COR): for any overtime hour worked beyond the contingent, the employee receives compensatory rest equivalent to 50% of the time worked in companies with 20 or fewer employees, and 100% in those with more than 20 employees.

Monitoring and mandatory documentation

The employer is required to precisely track the working time of each employee. The Court of Justice of the European Union (CJEU, 14 May 2019, C-55/18, CCOO v. Deutsche Bank) established the obligation for Member States to implement an objective and reliable system for recording working time. In French law, article D. 3171-8 CT requires the maintenance of a daily record for any employee subject to a collective schedule that differs. The Certyneo electronic signature HR solution allows you to securely archive these working time tracking documents with legal value.

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Tax and social exemption: the updated "Tepa" scheme

Since the law of 21 August 2007 (TEPA law), overtime benefits from tax and social advantages for the employee. In 2024-2026, the applicable regime provides for:

• Income tax exemption up to €7,500 per year (art. 81 quater of the French Tax Code, amended by the 2019 Finance Law)

• Reduction in employee social contributions of 11.31% applied to the remuneration of overtime hours

• Employer social contribution deduction for companies with fewer than 20 employees: €1.50 per overtime hour

Conditions of application

These advantages apply only to hours actually worked and declared on the pay slip, in compliance with legal or conventional payroll increase rates. Any reclassification of normal hours as fictitious overtime exposes the company to URSSAF adjustments. To secure the formalization of amendments and company agreements relating to working time, you can rely on a comprehensive guide to electronic signature that will help you dematerialize these documents in full compliance.

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Formalization of overtime agreements: the role of electronic signature

Many employers are unaware that company agreements relating to overtime — alternative rates, modulation, annual hour-based compensation — must be validly signed to have legal effect. Dematerialization of these documents is gaining ground: according to the "Digital Barometer" report from ARCEP (2024), 68% of French SMEs now use at least one electronic signature tool in their HR processes.

Which documents are involved?

• Company agreements on working time

• Individual amendments to the employment contract (shift to day-based salary, change of reference schedule)

• Delegation orders or overtime request forms

• Certificates of rest recovery or waiver of compensatory rest

Probative value and archiving

The qualified electronic signature within the meaning of the eIDAS regulation offers probative value equivalent to a handwritten signature (art. 25(2) of Regulation n°910/2014). For common HR documents, advanced electronic signature is sufficient in the vast majority of cases, provided that the identity of the signatory is verified reliably. The comparison of electronic signature solutions will help you identify the solution suited to your volumes and sectoral constraints. Archiving with probative value guarantees document retrieval in the event of URSSAF audit or labor dispute, with indisputable time-stamped traceability. Companies wishing to assess the return on investment of this approach can use the Certyneo ROI calculator to estimate concrete gains in time and administrative cost.

Legal framework applicable to overtime

The overtime regime is part of a precise legislative and regulatory corpus that every employer must master.

Labor Code:

• Art. L. 3121-27: sets the legal duration at 35 hours per week.

• Art. L. 3121-28: defines overtime as any hour worked beyond this legal duration.

• Art. L. 3121-30: establishes the annual contingent of overtime hours (220 h in the absence of an agreement).

• Art. L. 3121-33: permits collective agreements to set a minimum payroll increase rate of 10%.

• Art. L. 3121-36: establishes the legal rates of 25% and 50% in the absence of an agreement.

• Art. L. 3121-38 to L. 3121-42: regulate mandatory compensatory rest (COR).

• Art. D. 3171-8: requires daily tracking of working time.

French General Tax Code:

• Art. 81 quater of French Tax Code: income tax exemption up to €7,500/year for overtime hours.

Key case law:

• Cass. Soc., 14 November 2018, n°17-16.828: conditions for recognition of overtime worked at the employee's initiative.

• CJEU, 14 May 2019, C-55/18 (CCOO v. Deutsche Bank): obligation for a reliable working time tracking system in all Member States.

• Cass. Soc., 18 March 2020, n°18-10.919: the burden of proof for overtime is shared between employee and employer.

eIDAS Regulation n°910/2014 (EU): Company agreements and amendments to employment contracts formalizing the terms of overtime may be electronically signed. Article 25(2) of the eIDAS regulation grants qualified electronic signature (QES) probative value equivalent to handwritten signature. Advanced electronic signature (AES) is admissible for most HR acts, provided there is sufficient assurance of the signatory's identity.

GDPR n°2016/679: Working time data (time stamps, clock-in records, hours worked) constitute personal data. Their collection, processing and archiving must comply with the principles of minimization, purpose and security established by the GDPR. The recommended retention period is aligned with labor court prescription: 3 years for claims for wage payment (art. L. 3245-1 CT).

Risks in case of non-compliance:

• Condemnation to pay salary back pay plus legal interest

• URSSAF adjustment for evaded contributions

• Criminal fine for concealed work (art. L. 8221-5 CT) potentially reaching €45,000 and 3 years' imprisonment for individuals

• Damages for harm suffered by the employee

Usage scenarios: formalizing and managing overtime with electronic signature

Scenario 1 — Industrial SME with 85 employees during peak activity period

An industrial SME specializing in mechanical component manufacturing faces peaks in orders during the third quarter. Each year, it must formalize between 60 and 90 individual amendments concerning the accomplishment of overtime beyond the legal contingent (220 hours). Before dematerialization, the process required 3 to 4 days of physical signature collection, with an incomplete return rate of approximately 20%. By deploying an eIDAS-compliant advanced electronic signature solution, the company reduces this timeframe to less than 4 hours, achieves a completion rate of 98% and has legal time-stamping on each document. The estimated time saving represents approximately 15 hours of administrative work per campaign, equivalent to savings of around €2,000 per year according to ranges published by APEC on the cost of administrative hours.

Scenario 2 — Accounting firm managing payroll for 200 client companies

An accounting firm handling payroll and social obligations for its SME/micro-enterprise clients must regularly validate alternative agreements on overtime payroll increase rates (sector or company agreement). These agreements involve multiple signatories: union representatives or employee representatives, and the company leader. The use of a multi-party electronic signature workflow enables them to manage these signatures remotely, with automatic reminders, and centralize evidence in a digital vault. The firm reports a 35% reduction in the average time to collect signatures on collective agreements, from an average of 8 days to less than 3 days.

Scenario 3 — Distribution group with 12 retail outlets

A group of specialized retail chains employing approximately 300 employees must manage mandatory compensatory rest recovery (RCO) following contingent exceedance during holiday periods. Compensatory rest planning forms, signed by the manager and employee, were previously managed in paper format, resulting in document loss and difficulties during labor inspectorate audits. After deploying an electronic signature solution integrated with their HR system, 100% of forms are securely archived and retrievable within 48 hours in case of audit. The rate of labor disputes related to working time decreased by 40% over the 18 months following deployment, according to their internal legal department.

Conclusion

Overtime is governed by a precise legal framework: payroll increase rates of 25% and 50%, an annual contingent of 220 hours, mandatory compensatory rest and capped tax exemptions of €7,500. Any calculation error or formalization failure exposes the employer to URSSAF adjustments, salary back pay and costly labor disputes. Dematerialization of agreements and amendments relating to working time, via an eIDAS-compliant electronic signature solution, is today an essential lever to secure these documents and guarantee their probative value. Certyneo supports you in bringing your HR and legal processes into compliance. Create your Certyneo account for free to begin securely signing your HR documents today.