Payroll Calculation for a Forfait-Jours Employee Hired Mid-Year in France
Why does hiring a forfait-jours employee mid-year create payroll calculation difficulties?
The annual day-rate arrangement, or forfait annuel en jours (a fixed number of workdays agreed for the year), governed by Articles L.3121-58 et seq. of the French Labour Code, is a working-time arrangement reserved for autonomous managerial staff (cadres autonomes) and certain employees whose working hours cannot be predetermined. When a forfait-jours employee is hired during the calendar year or during the reference period, two separate calculations must be carried out by the payroll department:
- The pro rata calculation of remuneration for the first incomplete month of work;
- The pro rata calculation of the number of days to be worked over the remaining period.
These two operations are subject to strict rules that are often misunderstood, and failure to apply them exposes the employer to back-pay claims and litigation before the labour court (conseil de prud’hommes). This article sets out the mandatory methodology, with supporting formulas and a full worked example. For an overview of payroll mechanisms, see our complete payroll guide.
What is the mandatory method for pro-rating first-month pay for a forfait-jours employee?
Contrary to what some payroll software applies by default, the pro rata calculation of first-month remuneration for a forfait-jours employee is carried out exclusively on the basis of calendar days. It is strictly prohibited to pro-rate on the basis of working days (jours ouvrés), business days (jours ouvrables), or the thirtieth/thirty-first rule.
The applicable formula is as follows:
Monthly pay = Monthly remuneration − (Monthly remuneration ÷ Number of calendar days in the month × Number of calendar days not worked before hiring)
This formula results from the combined application of Article L.3242-1 (salary monthly averaging) and Articles L.3121-58 et seq. of the French Labour Code. The use of calendar days is justified by the fact that the forfait jours departs from the hourly calculation of working time: the reference to calendar days is the only method that is neutral and consistent with the very nature of the arrangement.
Why are the other pro-rating methods prohibited?
The thirtieth (or thirty-first) rule is a mechanism derived from case law applicable to employees whose working time is calculated in hours. Applying it to a forfait-jours employee would create an artificial distortion, sometimes favourable and sometimes unfavourable to the employee, depending on the actual number of calendar days in the month of hiring. Likewise, pro-rating on the basis of working days or business days is unsuited to the forfait jours, which is based on a calculation of days worked and rest days over the year, rather than on a weekly logic of five or six days.
The French Supreme Court (Cour de cassation) has repeatedly held that forfait-jours agreements must be interpreted strictly and that any calculation method not provided for by the applicable collective agreement or by law may be challenged (Cass. soc., 29 June 2011, no. 09-71.107). It is therefore imperative to adhere to the calendar-day method, which alone complies with the applicable legislation.
How to calculate the number of days to be worked over the remaining period after a mid-year hire?
The second calculation concerns determining the number of days the employee must actually work between the hiring date and the end of the reference period (generally 31 December for a period aligned with the calendar year). This operation follows a mandatory five-step method (a → e) detailed below.
Step (a): determine the calendar days remaining in the period
This involves counting the total number of calendar days between the hiring date (inclusive) and the last day of the reference period (inclusive). For example, for a hire on 15 April with a period aligned with the calendar year, count from 15 April to 31 December, i.e. 261 calendar days.
Step (b): deduct weekly rest days
Next, deduct all Saturdays and Sundays (or the weekly rest days provided for by the collective agreement) falling within the period. Article L.3132-1 of the French Labour Code guarantees weekly rest of at least 24 consecutive hours, to which the 11 hours of daily rest are added, i.e. 35 consecutive hours. For our example from 15 April to 31 December, this typically identifies 74 days of weekly rest (Saturdays and Sundays).
Step (c): deduct public holidays coinciding with a normally worked day
Only public holidays falling on a normally worked day (generally Monday to Friday) are deducted. Public holidays falling on a Saturday or Sunday do not need to be deducted, since they have already been neutralised in step (b). Articles L.3133-1 and L.3133-7 to L.3133-12 of the French Labour Code set out the list of statutory public holidays. For the period from 15 April to 31 December 2026, for example, 6 public holidays falling on a working day are identified (1 May, 8 May, 14 July, Ascension Thursday, 15 August, 1 November, 25 December depending on the year — the exact count depends on the calendar of the year concerned).
Step (d): deduct pro-rated paid leave entitlements
The employee hired mid-year acquires pro-rated paid leave entitlements pursuant to Article L.3141-1 of the French Labour Code. These entitlements must be estimated and deducted from the number of days to be worked. For an employee hired on 15 April, entitlements acquired over the remaining reference period are calculated on a prorata temporis basis. If the employee has acquired no paid leave entitlement (first year of employment without carry-over), this step may yield zero, but it must nevertheless be formalised in the calculation.
Step (e): deduct pro-rated forfait rest days
The rest days linked to the forfait (often referred to as RTT forfait or JNT — jours non travaillés, i.e. non-worked days) must also be pro-rated with respect to the remaining period of the year. The annual number of rest days is derived from the standard formula: 365 days − 104 weekly rest days − X public holidays on working days − 25 paid leave days − 218 days worked = Y rest days. This figure Y is then pro-rated according to the number of remaining calendar days relative to the total number of calendar days in the period. The result is rounded up to the next half-day according to the most protective practices, unless a collective agreement provides otherwise.
Final result and Solidarity Day
The number of days to be worked equals: (a) − (b) − (c) − (d) − (e). If the Solidarity Day (journée de solidarité, Article L.3133-7 of the French Labour Code) has not yet been performed for the current period with a previous employer, +1 day must be added to the result obtained. It is the employer’s responsibility to verify this point at hiring, by requesting from the employee a certificate from their previous employer.
What is the full worked example for a hire on 15 April with a salary of €4,000 and a 218-day forfait?
Consider the following scenario: an autonomous manager (cadre autonome) is hired on 15 April 2026 with a gross monthly remuneration of €4,000 and an annual forfait of 218 days over a period aligned with the calendar year (1 January – 31 December).
Calculation of April pay
April has 30 calendar days. The employee did not work from 1 to 14 April, i.e. 14 calendar days not worked.
April pay = 4,000 − (4,000 ÷ 30 × 14) = 4,000 − 1,866.67 = €2,133.33
Calculation of the number of days to be worked from 15 April to 31 December
(a) Calendar days from 15 April to 31 December: 261 days
(b) Weekly rest (Saturdays and Sundays): 74 days
(c) Public holidays on working days (1 May, 8 May, Ascension, 14 July, 15 August, 1 November, 25 December): 7 days (the exact count varies according to the 2026 calendar)
(d) Pro-rated paid leave entitlements acquired: the employee hired on 15 April has not yet acquired usable paid leave for the current period. We use 0 days (or the number of carried-over days, if any).
(e) Pro-rated forfait rest days: over the full year, the number of rest days is, for example, 10 days. Pro-rating: 10 × (261 ÷ 365) = 7.15 days, rounded up to 7.5 days.
Result: 261 − 74 − 7 − 0 − 7.5 = 172.5 days to be worked.
If the Solidarity Day has not been performed: 172.5 + 1 = 173.5 days.
This calculation must be formalised in a document annexed to the employment contract or in an amendment (avenant), in order to secure the contractual relationship and enable rigorous monitoring of the days-worked count. Use our forfait-jours simulator to automate this calculation.
What are the most common mistakes made by employers in this pro-rating?
Litigation relating to the forfait jours in cases of mid-year hiring reveals recurring errors, which we list below, together with the associated legal risks:
1. Using the thirtieth rule for first-month pay. This is the most common error. It results in a pay amount different from the correct amount, sometimes in the employee’s favour, sometimes against them. In both cases, the employee may claim back pay on the basis of Article L.3242-1 of the French Labour Code, with a three-year limitation period (Article L.3245-1).
2. Failure to pro-rate rest days. Some employers grant the full annual rest days to an employee hired mid-year, which artificially reduces the number of days worked and may cause difficulties in the event of a later departure (adjustment on the final settlement/solde de tout compte).
3. Pro-rating the days to be worked on the basis of working days rather than calendar days. The (a) → (e) method requires starting from calendar days. Starting from working days distorts the entire downstream calculation.
4. Failure to take the Solidarity Day into account. Overlooking the Solidarity Day is common in mid-year hiring, since the employee has not always performed this day with their previous employer. Article L.3133-7 of the French Labour Code nevertheless requires it to be performed annually.
5. Absence of written formalisation of the calculation. As the forfait agreement is a formal act requiring the employee’s express consent (Cass. soc., 31 January 2012, no. 10-17.593), the pro-rating of the forfait in the event of mid-year hiring must be formalised in writing, ideally in the employment contract or in an amendment.
How to reconcile forfait-jours pro-rating with DSN reporting obligations?
The nominative social declaration (DSN — déclaration sociale nominative) requires the monthly declaration of the number of days worked by the forfait-jours employee. In the event of a mid-month hire, the first DSN must reflect:
- The remuneration pro-rated in accordance with the formula described above;
- The number of days actually worked during the incomplete month;
- The pro-rated annual forfait applicable to the employee.
It is essential that the payroll software configuration be checked on these three points, as DSN anomalies may trigger requests for explanation from the URSSAF or the supplementary pension fund. To explore payroll mechanisms relating to the forfait jours further, see our payroll guide.
What are the applicable reference texts?
The legal framework for the forfait jours in the event of mid-year hiring is based on the following texts:
- Articles L.3121-58 et seq. of the French Labour Code: general regime of the annual day-rate forfait;
- Article L.3242-1 of the French Labour Code: salary monthly averaging;
- Article L.3132-1 of the French Labour Code: weekly rest;
- Article L.3133-1 of the French Labour Code: list of statutory public holidays;
- Articles L.3133-7 to L.3133-12 of the French Labour Code: Solidarity Day;
- Article L.3141-1 of the French Labour Code: paid leave.
The employer must also refer to the branch or company collective agreement establishing the forfait jours, which may provide for specific pro-rating arrangements, provided they are at least as favourable as the statutory provisions.
FAQ — Frequently asked questions on the payroll of a forfait-jours employee hired mid-year
Does calendar-day pro-rating also apply in the event of departure mid-month?
Yes. The calendar-day pro-rating method is symmetrical: it applies both on arrival and on departure mid-month. The final settlement (solde de tout compte) must be calculated using the same formula, taking into account the number of calendar days actually worked in the final month.
What happens if the employee exceeds the pro-rated number of days?
If the employee works more days than the pro-rated forfait, the excess days must be treated in accordance with Article L.3121-59 of the French Labour Code: the employee may, with the employer’s agreement, waive part of their rest days in exchange for a salary increase of at least 10%, formalised by an amendment to the employment contract.
Can the employer apply a different pro-rating method provided for by a collective agreement?
A collective agreement may provide for specific pro-rating arrangements, provided they are at least as favourable as the statutory method. However, calendar-day pro-rating of first-month pay remains the only method compliant with Article L.3242-1 of the French Labour Code. The collective agreement cannot depart from it to the employee’s detriment.
How to handle the absences of a forfait-jours employee hired mid-year?
Absences after hiring are deducted from the pro-rated forfait under the same rules as for an employee present all year. Each day of absence (sickness, unpaid leave, etc.) reduces the number of days to be worked by one unit and gives rise to a salary deduction calculated on the basis of the daily salary (monthly remuneration ÷ 21.67 average working days, or according to the applicable collective agreement method).
Must a summary document be provided to the employee?
Article L.3121-65 of the French Labour Code requires the employer to establish a monitoring document showing the number and dates of days or half-days worked. In the event of mid-year hiring, this document must indicate the applicable pro-rated forfait and the monitoring of days worked from the hiring date.
For any question relating to the payroll management of a forfait-jours employee, please do not hesitate to contact our firm. You may also use our online forfait-jours simulator to obtain an instant calculation.