Overtime Hours: Markup and Legal Calculation

Introduction

Overtime hours are one of the most closely scrutinized topics by both employers and employees. Between legal markup rates, annual cap rules, tax and social exemptions stemming from successive laws, and documentary obligations, the framework is comprehensive. A calculation error or lack of collective agreement can expose the company to URSSAF audits, even costly labor disputes. This article clarifies the entire applicable framework in 2026: definition, markup calculation, annual cap, exemption scheme and best practices to secure the management of these hours in your organization.

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Definition and Counting of Overtime Hours

What is an Overtime Hour?

An overtime hour is any hour of actual work performed beyond the legal weekly duration set at 35 hours (article L. 3121-28 of the French Labor Code). This definition applies to full-time employees subject to hourly counting. It does not, in principle, concern executives on a day-based salary, except under specific contractual clause.

Warning: only hours actually ordered or accepted by the employer count toward the calculation. An hour worked spontaneously by the employee without prior authorization does not automatically generate markup, although proof of actual work is sufficient in case of dispute (Cass. soc., June 2, 2010, No. 08-40.628).

Effective Working Time: Exclusions to Know

Effective working time (EWT) is defined in article L. 3121-1 of the Labor Code as "the time during which the employee is at the employer's disposal and complies with its directives without being able to freely attend to personal matters". Excluded from it are: break time, commute time (except on-call duty), and dressing-room time not covered by agreement. Only EWT serves as the basis for counting overtime hours.

Reference Period: Week or Modulation?

Under common law, the civil week (Monday 0 am to Sunday 24 pm) serves as the reference. However, a company or sector agreement may establish work-time adjustment over a period longer than a week (up to one year: article L. 3121-44). In this case, overtime hours are counted at the end of the period, which changes the timing of payment and contingent calculations.

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Legal and Collective Markup Rates

Reference Legal Rates

Article L. 3121-36 of the Labor Code sets the following minimum rates:

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

• 50% markup from the 9th overtime hour onward (from the 44th weekly hour).

These rates apply to the base hourly wage, i.e., the usual gross salary divided by the contractual duration. Elements of remuneration with the character of salary and paid in direct return for work must be included (bonuses included if they are part of it, according to established case law of the Court of Cassation).

Concrete Calculation Example

An employee receives a gross monthly salary of €2,100 for 35 weekly hours (151.67 monthly hours). His base hourly rate is therefore: 2,100 / 151.67 = €13.84 gross/hour.

He performs 5 overtime hours in the week (36th to 40th hour):

• 25% markup: 13.84 × 1.25 = €17.30/hour

• Total for 5 hours: 5 × 17.30 = €86.50 additional gross

If 3 overtime hours are performed from the 44th hour onward:

• 50% markup: 13.84 × 1.50 = €20.76/hour

• Total for 3 hours: 3 × 20.76 = €62.28 additional gross

Modulation by Collective Agreement

A sector or company agreement may waive legal rates, provided it does not fall below 10% markup (article L. 3121-33). It may also provide for replacement of all or part of the increased payment with a compensatory rest day (CRD), neutral for company cash flow but subject to strict rules for initiation and taking.

To learn more about formalizing these agreements and signing salary amendments, the electronic signature solution for HR offered by Certyneo allows you to digitize all these documents in full compliance.

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Annual Cap on Overtime Hours

Legal and Collective Volume

The annual cap is the volume of overtime hours an employer can require an employee to work without prior authorization from the labor inspection authority. In the absence of a collective agreement, it is set by decree at 220 hours per year per employee (decree No. 2002-622 of April 25, 2002, codified in article D. 3121-24).

A company or sector agreement may:

• Reduce this cap below 220 hours;

• Increase this cap above 220 hours (with no explicit legal ceiling, subject to compliance with absolute maximum durations).

Absolute Maximum Durations: Legal Safeguards

Even beyond the cap, absolute ceilings apply:

• 10 hours of actual work per day (article L. 3121-18);

• 48 hours of actual work per week (article L. 3121-20);

• 44 hours on average over 12 consecutive weeks (article L. 3121-22);

• 11 hours of mandatory daily rest (article L. 3131-1).

These limits are of absolute public order: no collective agreement can derogate from them, except under exceptional circumstances governed by ministerial order.

Beyond the Cap: Mandatory Rest Counterpart (MRC)

When overtime hours exceed the annual cap (contractual or legal), each hour worked beyond it entitles the employee to a mandatory rest counterpart (MRC). Its rate is:

• 50% in companies with 20 or fewer employees;

• 100% in companies with more than 20 employees.

This rest is distinct from CRD and must be taken within two months following the opening of the right. The employer is required to inform the employee of the number of rest hours acquired via the pay slip.

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Tax and Social Exemptions: The "Macron Work" Scheme

Income Tax Exemption

Since the TEPA law of August 21, 2007 (partially repealed, then reinstated by the law of August 16, 2022 called "purchasing power"), remuneration for overtime hours is exempt from income tax within the limit of €7,500 per year (cap applicable for 2026 income, subject to the Finance Law).

This exemption benefits all private sector employees, civil servants, and agricultural employees.

Reduction of Employee Contribution Deductions

Overtime hours also benefit from a flat-rate deduction of employee contributions set at 11.31% (2026 rate according to the annual order of the Social Security Directorate). This rate applies to overtime remuneration (including markup), which significantly improves the net amount received by the employee.

Flat-Rate Employer Deduction

Employers with fewer than 20 employees benefit from a flat-rate deduction of employer contributions of €1.50 per overtime hour worked (article L. 241-18 of the Social Security Code). Beyond 20 employees, this deduction has been eliminated since 2012.

To optimize tracking of these exemptions and ensure the traceability of agreements, many companies rely on a comprehensive guide to electronic signatures to digitize amendments and work-time counting documents.

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Counting, Payment and Traceability Obligations

The Pay Slip: Mandatory Mentions

Each overtime hour must appear on the pay slip, with separate mention of the number of hours, the applicable markup rate, and the corresponding gross amount. This obligation is set out in article R. 3243-1 of the Labor Code and reinforced by the order of February 25, 2016 on the simplified pay slip.

Failure to provide separate counting can be considered as evidence of concealment of salaried employment (article L. 8221-5), with associated criminal and civil penalties.

Work-Time Counting Documents

The employer is required to implement a reliable system for counting work time for each employee not subject to a day-based salary (CJEU, May 14, 2019, case C-55/18, CCOO v. Deutsche Bank). This system must be objective, accessible and retained for 3 years (article D. 3171-16).

Recourse to a digital time management tool is strongly recommended. Agreements for implementing such tools, as well as usage charters, can be signed electronically via a platform compliant with eIDAS — to explore via our comparison of electronic signature solutions.

Prescription and Disputes

The prescription period for claiming payment of overtime hours is 3 years from the date when the rights holder knew or should have known the facts allowing him to exercise his action (article L. 3245-1). This period runs from the date the pay slip was issued. In case of deliberate concealment, the period may be extended to 5 years (article 2224 of the Civil Code).

Companies that digitize their HR documents with an electronic signature compliant with European standards have time-stamped and tamper-proof proof, valuable in case of dispute.

Legal Framework Applicable to Overtime Hours

The regulation of overtime hours is part of a layered legislative and regulatory framework that must be mastered to avoid any risk of reclassification or audit.

Labor Code — Fundamental Provisions:

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

• Articles L. 3121-33 to L. 3121-36: set markup rates (25% and 50%) and provide conditions for waiving by collective agreement (minimum 10%).

• Articles L. 3121-44 to L. 3121-47: regulate work-time adjustment over a period longer than a week and the resulting overtime calculation.

• Article D. 3121-24: sets the legal cap at 220 hours per year absent a collective agreement.

• Articles L. 3121-28 to L. 3121-30: absolute maximum durations (daily, weekly, average over 12 weeks).

• Article L. 3245-1: 3-year prescription for salary payment claims, including overtime.

• Articles L. 3171-1 and D. 3171-16: obligations to count and retain work-time documents for 3 years.

Social Security Code:

• Article L. 241-18: flat-rate employer deduction of €1.50 per overtime hour for companies with fewer than 20 employees.

• Article L. 241-17: reduction of employee contributions applicable to overtime remuneration.

Tax Law:

• Article 81 quater of the General Tax Code: income tax exemption for overtime remuneration within the limit of €7,500 per year, arising from law No. 2022-1158 of August 16, 2022 carrying urgent measures for protection of purchasing power.

Case Law and European Law:

• CJEU, May 14, 2019, case C-55/18 (CCOO v. Deutsche Bank): Member States must require employers to implement an objective, reliable and accessible system enabling measurement of daily working time for each employee.

• Cass. soc., March 18, 2020, No. 18-10.919: proof of overtime hours is shared between the employee (who must provide sufficiently precise elements) and the employer (who must justify actual hours worked).

Non-Compliance Risks: Failure to pay or underpayment of overtime hours exposes the employer to URSSAF audit (recovery of contributions, surcharges of 5% to 10%), to damages in labor court, or even criminal prosecution for concealment of employment (article L. 8221-5: fine up to €45,000 and 3 years imprisonment for individuals). Maintaining a reliable counting system and securely digitizing agreements constitute the first lines of defense.

Use Cases: Managing Overtime with Electronic Signature

Case 1 — A Mid-Sized Industrial SME with 60 Employees During Peak Season

A mid-sized manufacturing company employs 60 production operators. Each quarter, a surge in activity generates an average of 8 to 12 weekly overtime hours per employee for 6 weeks. The company previously had to print, have physically signed, and archive amendments for contingent overruns and compensatory rest agreements. This process took 3 to 4 business days from drafting to collection of all signatures.

By deploying an eIDAS-compliant electronic signature solution at advanced level, the company reduces this timeframe to less than 4 hours: the amendment is generated from a pre-configured template, sent by SMS/email notification, signed from the employee's smartphone, and automatically archived with qualified time-stamping. Operational gains observed in similar contexts range between 60 and 80% reduction in signature cycle, according to sector studies published by the French Federation of Industries.

Case 2 — An Accounting Firm Managing Payroll for SMEs

An accounting firm managing payroll for 150 SME clients must each month validate overtime hour counts, inform them of exemption thresholds reached, and have the business owner validate variable pay elements before processing. Unsecured email exchanges exposed the firm to risks of later contestation over transmitted data.

Through a digitized validation workflow with simple electronic signature integrated into its payroll software, the firm obtains time-stamped legal proof of client agreement on each variable slip. In case of dispute, full traceability is available. The firm reports approximately 40% reduction in monthly administrative management time related to validations, consistent with benchmarks in the accounting sector (IFEC report 2024).

Case 3 — A Retail Distribution Network with Atypical Hours

A retail chain with about twenty locations manages variable schedules regularly incorporating overtime on weekends and evenings. The HR manager had to centralize paper timesheets from each store, manually recalculate markups, and notify employees. The process was a source of recurring errors and delays.

Integration of an automated counting tool coupled with an electronic signature dedicated to HR teams made it possible to reliably calculate markups (25% and 50%) in real time, automatically send validated summary slips by electronic signature, and build a legal archive compliant with article D. 3171-16. The network estimates it has reduced labor disputes related to overtime by more than 70% over two consecutive fiscal years, consistent with documented experience returns in the retail sector.

Conclusion

Overtime hours are subject to a precise legal framework that every employer must master: 25% and 50% markup rates, 220-hour annual cap, capped tax and social exemptions, and strict counting and traceability obligations. Mismanagement of these elements exposes the company to URSSAF audits, labor disputes, and criminal penalties for concealment of employment.

Digitization of HR documents related to overtime — amendments, compensatory rest agreements, variable pay slips — is today the best way to secure proof and accelerate processes. Certyneo supports you in this approach with an eIDAS-compliant electronic signature platform, simple to integrate and suited for HR teams of all sizes.

Ready to secure your HR documents? Discover our pricing and start free on Certyneo.