Overtime Hours: Premium Rate and Legal Calculation

Introduction

Overtime hours constitute one of the most closely monitored subjects by both employers and employees. Between the legal premium rates, the rules of the annual threshold, tax and social exemptions arising from successive laws, and documentary obligations, the system is dense. A calculation error or failure to comply with a collective agreement can expose the company to URSSAF adjustments, or even costly employment tribunal disputes. This article reviews the entire applicable framework in 2026: definition, premium calculation, annual threshold, exemption scheme and best practices for securing the management of these hours in your organisation.

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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 Labour Code). This definition applies to full-time employees subject to hourly counting. It does not, as a general rule, apply to executives on a day-rate basis, unless a specific collective agreement provides otherwise.

Caution: only hours actually ordered or accepted by the employer are included in the calculation. An hour worked spontaneously by the employee without prior authorisation does not automatically generate a premium, even if proof of the actual work is sufficient in the event of a dispute (Cass. soc., 2 June 2010, No. 08-40.628).

Actual working time: exclusions to know

Actual working time (TTE) is defined in Article L. 3121-1 of the Labour Code as "the time during which the employee is at the disposal of the employer and complies with his or her directives without being able to attend freely to personal business". Excluded from this are: break periods, commute time from home to work (except on-call duty) and dressing periods not taken into account by agreement. Only TTE serves as the basis for counting overtime hours.

Reference period: week or modulation?

Under common law, the calendar week (Monday 0 hrs to Sunday 24 hrs) serves as the reference. However, a company or sectoral agreement may establish a working time arrangement over a period longer than a week (up to the year: Article L. 3121-44). In this case, overtime hours are counted at the end of the period, which changes the payment date and threshold calculations.

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Legal and collective premium rates

Reference legal rates

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

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

• 50% premium from the 9th overtime hour onwards (from the 44th weekly hour).

These rates apply to basic hourly pay, i.e. the usual gross salary divided by the contractual duration. This must include elements of remuneration with the character of salary paid as direct consideration for work (premiums included if they form part of it, according to the established case law of the social chamber).

Concrete calculation example

An employee receives a gross monthly salary of €2,100 for 35 hours per week (151.67 hours per month). His or her basic hourly rate is therefore: 2,100 / 151.67 = €13.84 gross/hour.

He or she works 5 overtime hours during the week (36th to 40th hour):

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

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

If 3 overtime hours are worked from the 44th hour:

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

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

Modulation by collective agreement

A sectoral or company agreement may derogate from legal rates, provided that it does not fall below 10% premium (Article L. 3121-33). It may also provide for the replacement of all or part of the increased payment with a replacement compensatory rest (RCR), neutral for the company's cash flow but subject to strict rules on triggering and taking.

To go further on formalising these agreements and signing employee salary amendments, the electronic signature solution for HR offered by Certyneo allows you to digitalise all these documents in full compliance.

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The annual overtime threshold

Legal and collective volume

The annual threshold is the volume of overtime hours an employer can have performed by an employee without prior authorisation from the labour inspectorate. In the absence of a collective agreement, it is set by decree at 220 hours per year per employee (Decree No. 2002-622 of 25 April 2002, codified in Article D. 3121-24).

A company or sectoral agreement may:

• Reduce this threshold below 220 hours;

• Increase this threshold above 220 hours (without explicit legal ceiling, subject to compliance with absolute maximum durations).

Absolute maximum durations: the legal safeguards

Even beyond the threshold, 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 in exceptional circumstances governed by ministerial decree.

Beyond the threshold: the mandatory rest provision (COR)

When overtime hours exceed the annual threshold (collective or legal), each hour worked beyond it gives entitlement to a mandatory rest provision (COR). Its rate is:

• 50% in companies with 20 or fewer employees;

• 100% in companies with more than 20 employees.

This rest is separate from RCR and must be taken within two months of the opening of the right. The employer is required to inform the employee of the number of rest hours acquired via the payslip.

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Tax and social exemptions: the "Macron work" scheme

Exemption from income tax

Since the TEPA Act of 21 August 2007 (partially repealed, then restored by the Act of 16 August 2022 known as "purchasing power"), the remuneration paid for overtime hours is exempt from income tax up to a limit of €7,500 per year (threshold applicable to 2026 income, subject to finance law).

This exemption applies to all private sector employees, public servants and employees in agricultural professions.

Reduction in employee contributions

Overtime hours also benefit from a standard deduction of employee contributions of 11.31% (2026 rate according to the annual decree of the social security management directorate). This rate applies to overtime remuneration (including premium), which significantly improves the net amount received by the employee.

Standard employer deduction

Employers with fewer than 20 employees benefit from a standard 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 optimise the monitoring of these exemptions and ensure traceability of agreements, many companies rely on a comprehensive guide to electronic signature to digitalise amendments and working time counting documents.

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Counting, payment and traceability obligations

The payslip: mandatory entries

Each overtime hour must be shown on the payslip, with a separate statement of the number of hours, the applicable premium rate and the corresponding gross amount. This obligation is set out in Article R. 3243-1 of the Labour Code and strengthened by the Decree of 25 February 2016 on the simplified payslip.

The absence of a separate statement can be taken as evidence of concealment of salaried employment (Article L. 8221-5), with the associated criminal and civil penalties.

Working time counting documents

The employer is required to put in place a reliable system for counting working time for each employee not subject to a day-rate basis (CJEU, 14 May 2019, Case C-55/18, CCOO v Deutsche Bank). This system must be objective, accessible and retained for 3 years (Article D. 3171-16).

The use of a digital time management tool is strongly recommended. Agreements for the implementation of such tools, as well as usage policies, can be signed electronically via an eIDAS-compliant platform — to be explored via our comparison of electronic signature solutions.

Limitation periods and litigation

The limitation period for claiming payment of overtime hours is 3 years from the date the rights holder knew or should have known of the facts enabling him or her to exercise the action (Article L. 3245-1). This period runs from the date the payslip is delivered. In the event of deliberate concealment, the period may be extended to 5 years (Article 2224 of the Civil Code).

Companies that digitalise their HR documents with an electronic signature compliant with European standards have time-stamped and tamper-proof evidence, invaluable in the event of a dispute.

Legal framework applicable to overtime hours

The regulation of overtime hours is part of a stratified legislative and regulatory framework that must be understood to avoid any risk of reclassification or adjustment.

Labour Code — fundamental provisions:

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

• Articles L. 3121-33 to L. 3121-36: set the premium rates (25% and 50%) and provide for the conditions of derogation by collective agreement (floor at 10%).

• Articles L. 3121-44 to L. 3121-47: govern working time arrangements over a period longer than a week and the calculation of resulting overtime hours.

• Article D. 3121-24: sets the legal threshold at 220 hours per year in the absence of 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 limitation for actions for payment of wages, including overtime hours.

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

Social Security Code:

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

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

Tax law:

• Article 81 quater of the General Tax Code: exemption from income tax on overtime remuneration up to €7,500 per year, arising from Act No. 2022-1158 of 16 August 2022 on emergency measures to protect purchasing power.

Case law and European law:

• CJEU, 14 May 2019, Case C-55/18 (CCOO v Deutsche Bank): Member States must require employers to put in place an objective, reliable and accessible system to measure the daily working time of each employee.

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

Non-compliance risks: Non-payment or underpayment of overtime hours exposes the employer to URSSAF adjustment (recovery of contributions, increases of 5% to 10%), to damages and interest in the employment tribunal, or even criminal prosecution for concealed work (Article L. 8221-5: fine up to €45,000 and 3 years' imprisonment for individuals). Maintaining a reliable counting system and securing the digitalisation of agreements are the first lines of defence.

Use cases: managing overtime with electronic signature

Scenario 1 — A 60-employee industrial SME in peak season

An SME in the manufacturing sector employs 60 production operators. Each quarter, increased business generates an average of 8 to 12 weekly overtime hours per employee for 6 weeks. The company previously had to print, have amendments signed in person and physically archive threshold overrun amendments and replacement compensatory rest agreements. This process took 3 to 4 working days between drafting and collecting all signatures.

By deploying an eIDAS-compliant electronic signature solution at advanced level, the company reduces this time 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. The operational benefits observed in similar contexts range from 60 to 80% reduction in signature cycle, according to industry studies published by the French Federation of Industries.

Scenario 2 — An accounting firm managing payroll for SMEs

An accounting firm managing the payroll of 150 SMEs must each month validate overtime deductions, inform them of exemption thresholds reached and have the business manager validate variable pay elements before processing. Exchanges via unsecured email exposed the firm to the risk of later contestation of transmitted data.

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

Scenario 3 — A retail distribution network with atypical schedules

A retail chain with about twenty stores manages variable schedules regularly incorporating overtime at weekends and in the evenings. The HR manager had to centralise time cards from each store, manually recalculate premiums and notify employees. The process was a source of recurring errors and delays.

The integration of an automated counting tool coupled with an electronic signature dedicated to HR teams made it possible to secure the calculation of premiums (25% and 50%) in real time, automatically send validated summary statements signed electronically and establish a legal archive compliant with Article D. 3171-16. The network estimates it has reduced employment tribunal disputes related to overtime by more than 70% over two consecutive years, in line with documented feedback from the retail commerce sector.

Conclusion

Overtime hours are governed by a precise legal framework that every employer must understand: premium rates of 25% and 50%, an annual threshold of 220 hours, capped tax and social exemptions, and strict counting and traceability obligations. Mismanagement of these elements exposes the company to URSSAF adjustments, employment tribunal disputes and criminal penalties for concealed work.

The digitalisation of HR documents related to overtime — amendments, compensatory rest agreements, variable payslip statements — is now the best way to secure evidence and speed up processes. Certyneo supports you in this approach with an eIDAS-compliant electronic signature platform, simple to integrate and suitable for HR teams of all sizes.

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