Understand the French distinction between part-time additional hours and overtime, including limits, premium bands and examples.
When a part-time employee works beyond the duration stated in the contract, France distinguishes these additional hours (heures complémentaires) from ordinary overtime performed by a full-time employee.
That distinction matters because the limits and premium rules are different.
Take a 24-hour weekly contract and a week in which 28 hours are actually worked. The excess is 28 − 24 = 4 additional hours.
The part-time additional hours calculator performs this comparison and splits the excess into configurable bands.
If daily schedules still need to be reconstructed, start with the work hours calculator.
French official guidance describes a general limit of one tenth of the weekly or monthly contractual duration, while collective provisions can extend the limit to one third.
For a 24-hour weekly contract, one tenth is 2.4 hours, or 2 h 24 min.
This calculation does not by itself authorise any amount of extra work. Contractual and collective limits must be checked separately.
French official guidance states that additional hours receive increased pay. In the general scenario, hours within the first tenth are increased by 10%, then hours beyond that first tenth by 25% within the permitted limit.
The calculator uses 10% and 25% as a France-specific starting scenario while keeping the rates editable.
At €15 per hour, the first 2.4 hours at +10% produce 2.4 × 15 × 1.10 = €39.60.
The remaining 1.6 hours at +25% produce 1.6 × 15 × 1.25 = €30.
The four additional hours therefore represent €69.60 in this illustrative calculation. It does not reconstruct a complete payslip.
Because the starting logic is different. Full-time overtime compares worked hours with the relevant full-time threshold. Part-time additional hours start with the employee’s contractual part-time duration and a first limit expressed as a fraction of that duration.
See Overtime: how to calculate it for the full-time model.
Compare weekly contractual hours with a weekly total, and monthly contractual hours with a monthly total. Mixing a weekly contract with a monthly worked total makes the result meaningless.
The decimal hours converter is useful when contractual limits or timesheets use decimal notation.
Part-time employees can also work at night, on Sundays or on public holidays. These characteristics do not automatically change an additional hour into another category.
Analyse the contractual-duration question separately from any compensation linked to when the work occurred. See night work and Sunday/public-holiday work.
Variable schedules are easier to check with a timesheet containing dates, start and end times, breaks and daily totals. The Excel timesheet generator provides a monthly structure, explained in our Excel timesheet guide.
Start with the contract: duration, reference period and applicable provisions. Additional hours in a French part-time contract are not simply full-time overtime under another name.
The default 10% and 25% rates reflect the general French scenario; verify the collective agreement, contract and applicable rules for a real case.
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