Calculating the number of working days in the year seems simple: you start with 365, subtract weekends, holidays, and leave. However, the result varies depending on the employee’s status, the working hours regime applied, and the applicable collective agreement. The gap between an employee working 35 hours and a manager on a fixed days contract can exceed several dozen days in the same calendar year.
Basic formula and variables for calculating working days
The method relies on a progressive subtraction. You start with the total number of days in the year, then subtract each category of non-working days.
| Element | Typical value (non-leap year) |
|---|---|
| Days in the year | 365 |
| Saturdays and Sundays | 104 |
| Public holidays falling on a working day | Variable depending on the year |
| Legal paid leave (working days) | 25 |
| RTT (if applicable) | Variable depending on company agreement |
| Estimated working days | About 226 before deducting RTT |
This table reflects the situation of a full-time employee on a 5-day week. The figure of 104 weekend days corresponds to the 52 Saturdays and 52 Sundays in the year. Legal paid leave represents 5 weeks, or 25 working days for full-time work.
The most fluctuating variable remains the number of public holidays that actually fall on a working day. A year where several holidays coincide with a Saturday or Sunday mechanically produces more working days. To consult the number of working days according to Boost 4 Business, the logic of deduction remains the same, but the details of HR processing provide additional insight into the associated rights.
Fixed days: a calculation of working days that changes the game
Managers and self-employed employees subject to a fixed days agreement do not count their hours. Their contract sets an annual ceiling for working days, usually capped by law and the applicable collective agreement.
This ceiling is calculated differently. You still start with 365 days, subtract weekends, public holidays, and paid leave, but then you add the additional rest days related to the fixed days (often referred to as RTT by misuse of language). The number of these rest days varies each year as it directly depends on the positioning of holidays within the week.
The fundamental difference with a 35-hour employee is that the fixed days count days, not hours. A manager on a fixed days contract who works 10 hours on a Tuesday does not generate overtime. This mechanism makes the calculation appear clearer, but it masks a reality: the actual number of working days depends on the rigor of tracking.
Check the consistency between fixed days and payslip
The payslip of an employee on a fixed days contract must mention the number of working days during the period. This obligation allows for checking that the annual ceiling is not exceeded. A discrepancy between the actual count and the contractual fixed days can entitle the employee to a salary increase or compensatory leave.
The payroll manager reconciles each month the count of working days with the planned fixed days. If the employee has exhausted their rest days but the year is not over, the company must either grant them additional days or formalize a waiver amendment with a salary increase.
Reference period for paid leave and impact on annual count
A common pitfall is to reason solely in terms of the calendar year. For calculating rights to paid leave, the legal reference period runs from June 1 to May 31 of the following year, in accordance with articles L3141-3 and L3141-4 of the Labor Code. This period does not coincide with the calendar year used for fixed days or the count of working days.
An employee hired in September will not have accrued all 25 working days of leave by December 31. Their number of working days in the calendar year will therefore be higher than that of a colleague who has been present for more than a year, even in the same position and hours.
- An employee must justify effective work over the entire reference period to obtain their 30 working days (or 25 working days) of annual paid leave.
- Absences not considered as effective work (unpaid leave, unjustified absence) reduce the number of accrued leave days, which indirectly modifies the number of working days.
- Some collective agreements set a reference period aligned with the calendar year, which simplifies the count but remains an exception.
Working days, business days, working days: do not confuse the bases
Business days include all days of the week except Sunday and public holidays, potentially 6 days a week. Working days also exclude Saturday, bringing the typical week down to 5 days. Working days are the actual working days performed, after deducting leave, RTT, and absences.
This distinction has a direct impact on payroll. A salary maintenance calculation during sick leave or absence does not yield the same result depending on whether it is done in business days or working days. Confusing these two bases generates errors of a few days on a payslip, but these discrepancies accumulate over the year.
Common errors in the annual calculation of working days
The first error is to apply a fixed number of public holidays without checking the actual calendar. The number of holidays falling on a working day changes each year. Using an average figure instead of the exact count skews the result.
The second error concerns part-time employees. An employee working 4 days a week does not subtract 104 weekend days but a number adjusted to their schedule. The calculation must start from their contractual presence days, not from the full-time base.
The third error relates to bridges and closure days imposed by the company. These days, often deducted from the RTT or leave count, alter the actual number of days when the employee freely chooses their absences. They do not always appear in the theoretical calculation but weigh in the final count.
The precise calculation of the number of working days remains an annual exercise, not a constant. Each change in calendar, company agreement, or individual situation (hiring mid-year, moving to part-time, amendment to the fixed days) requires starting the subtraction from the beginning.