Day-Rate (Forfait Jours) Employees Hired Mid-Year in France: How to Calculate Payroll

Why does hiring a forfait jours employee mid-year create payroll calculation difficulties?

The annual day-rate arrangement (forfait annuel en jours — a fixed number of working days per year), governed by Articles L.3121-58 et seq. of the French Labour Code, is a working-time arrangement reserved for autonomous executives (cadres autonomes) and certain employees whose working time cannot be predetermined. When a forfait jours employee is hired during the calendar year or during the reference period, two separate calculations must imperatively be performed by the payroll department:

The proration of remuneration for the first incomplete month of work;
The proration of the number of days to be worked over the remaining reference period.

Both operations follow strict rules that are often misunderstood, and failure to apply them exposes the employer to salary back-pay claims and to litigation before the labour court (conseil de prud’hommes). This article details the mandatory methodology, with formulas and a complete numerical example. For an overview of payroll mechanisms, see our complete payroll guide.

What is the mandatory method for prorating first-month pay of a forfait jours employee?

Contrary to what some payroll software applies by default, the proration of first-month remuneration for a forfait jours employee is carried out exclusively on the basis of calendar days. It is strictly prohibited to prorate on the basis of working days (jours ouvrés), open days (jours ouvrables), or the thirtieth/thirty-first rule.

The applicable formula is as follows:

Pay for the month = Monthly remuneration − (Monthly remuneration ÷ Number of calendar days in the month × Number of calendar days not worked before the hire date)

This formula results from the combined application of Article L.3242-1 (monthly salary standardisation) 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 counting of working time: the reference to calendar days is the only one that is neutral and consistent with the very nature of the arrangement.

Why are the other proration methods prohibited?

The thirtieth (or thirty-first) rule is a mechanism derived from case law applicable to employees whose working time is counted 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 hire. Likewise, proration on working days (jours ouvrés) or open days (jours ouvrables) is unsuited to the forfait jours, which is based on a count of days worked and rest days over the year, and not on a weekly logic of five or six days.

The French Supreme Court (Cour de cassation) has repeatedly held that day-rate 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 texts.

How to calculate the number of days to be worked over the remaining reference period after a mid-year hire?

The second calculation to be performed concerns determining the number of days the employee will actually have to work between the hire 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 reference period

This means counting the total number of calendar days between the hire 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, one counts from 15 April to 31 December, i.e. 261 calendar days.

Step (b): deduct weekly rest days

All Saturdays and Sundays (or the weekly rest days provided for by the collective agreement) falling within the period are then deducted. Article L.3132-1 of the French Labour Code guarantees a 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, one 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 are already 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, one identifies, for example, 6 public holidays falling on a working day (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 prorated paid-leave entitlements

An employee hired mid-year acquires prorated 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 pro rata temporis. 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 prorated forfait rest days

Rest days linked to the forfait (often called “RTT forfait” or “JNT — jours non travaillés”, i.e. non-worked days) must also be prorated in relation to the remaining period of the reference period. The annual number of rest days is derived from the classic 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 prorated according to the number of remaining calendar days relative to the total number of calendar days in the reference period. The result is rounded up to the nearest half-day according to the most protective practices, unless a contrary collective provision applies.

Final result and the 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 reference 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 the time of hiring, by requesting from the employee a certificate from their previous employer.

What is the complete numerical example for a hire on 15 April with a salary of EUR 4,000 and a 218-day forfait?

Let us take the following scenario: an autonomous executive is hired on 15 April 2026 with a gross monthly remuneration of EUR 4,000 and an annual forfait of 218 days, over a reference period aligned with the calendar year (1 January – 31 December).

Calculating 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 = EUR 2,133.33

Calculating 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) Prorated acquired paid-leave entitlements: an employee hired on 15 April has not yet acquired usable paid leave for the current reference period. We take 0 days (or the number of carried-over days, if any).

(e) Prorated forfait rest days: over the full year, the number of rest days is, for example, 10 days. Proration: 10 × (261 ÷ 365) = 7.15 days, rounded 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 appended to the employment contract or in an amendment (avenant), in order to secure the contractual relationship and enable rigorous monitoring of the count of days worked. Use our forfait jours simulator to automate this calculation.

What are the most common mistakes made by employers in this proration?

Litigation relating to the forfait jours in the event of a mid-year hire reveals recurring errors, which we list below along with the associated legal risks:

1. Using the thirtieth rule for first-month pay. This is the most frequent error. It leads to a pay amount that differs from the correct amount, sometimes in the employee’s favour, sometimes to their detriment. In both cases, the employee may claim salary 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. Failing to prorate 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 can create difficulties in the event of a subsequent departure (adjustment on the final settlement / solde de tout compte).

3. Prorating 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. Failing to account for the solidarity day. Overlooking the solidarity day is common in the event of a mid-year hire, whereas the employee has not always performed this day with their previous employer. Article L.3133-7 of the French Labour Code nonetheless requires it to be performed annually.

5. Absence of a written record 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 proration of the forfait in the event of a mid-year hire must be formalised in writing, ideally in the employment contract or in an amendment.

How to reconcile forfait jours proration with DSN reporting obligations?

The nominative social declaration (DSN) requires monthly reporting of the number of days worked by a forfait jours employee. In the event of a mid-month hire, the first DSN must reflect:

The remuneration prorated in accordance with the formula described above;
The number of days actually worked in the incomplete month;
The prorated annual forfait applicable to the employee.

It is essential that the payroll software configuration be verified on these three points, as DSN anomalies may trigger requests for explanation from the URSSAF (social security collection agency) or the supplementary pension fund. To explore payroll mechanisms linked 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 a mid-year hire rests 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: monthly salary standardisation;
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 industry-wide or company-level collective agreement establishing the forfait jours, which may provide for specific proration methods, provided they are at least as favourable as the statutory provisions.

FAQ — Frequently asked questions about payroll for a forfait jours employee hired mid-year

Does proration by calendar days also apply in the event of a mid-month departure?

Yes. The calendar-day proration method is symmetrical: it applies both to arrivals and to departures during a month. The final settlement (solde de tout compte) must be calculated using the same formula, taking the number of calendar days actually worked in the last month.

What happens if the employee exceeds the prorated number of days?

If the employee works more days than the prorated forfait, the excess days must be handled 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 in an amendment to the employment contract.

Can the employer apply a different proration method provided for by a collective agreement?

A collective agreement may provide for specific proration methods, provided they are at least as favourable as the statutory method. However, proration of first-month pay by calendar days remains the only method compliant with the provisions of Article L.3242-1 of the French Labour Code. The collective agreement cannot derogate from it to the employee’s detriment.

How to handle absences of a forfait jours employee hired mid-year?

Absences occurring after the hire date are deducted from the prorated forfait according to the same rules as for an employee present all year. Each day of absence (sick leave, 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 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 the days or half-days worked. In the event of a mid-year hire, this document must state the applicable prorated forfait and the tracking of days worked from the hire date.

For any question relating to the management of payroll for a forfait jours employee, do not hesitate to contact our firm. You may also use our online forfait jours simulator to obtain an instant calculation.