Doing a higher-graded job in France without the pay: classification and back pay

In principle your classification matches the duties you actually perform: France’s highest court, the Cour de cassation, ruled so on 12 January 2010 (No. 08-42.835), with one exception, when the employer deliberately and unequivocally grants you a higher grade. The job title in your contract or job description does not, on its own, set your level.

To check, start from the collective agreement (convention collective) that applies, the one covering your employer’s main activity (Labour Code, article L2261-2). Read how its grid defines each level or grade coefficient (coefficient): autonomy, responsibilities, supervision, required knowledge or experience. Compare that definition, point by point, with what you do each week, then note the minimum pay of the level that really describes your work.

• Your current level: contract and payslips
• The definition of the level you claim in the agreement’s grid
• Your actual tasks, with dated examples

You, the employee, must prove that you actually and habitually perform the tasks and responsibilities of the classification you claim (Cour de cassation, 10 July 2024, No. 23-15.453). In that case the employee claimed 7,280.04 € gross in back pay on the agreement minima from 24 April 2015 to 24 April 2018; the claim failed because nothing showed the duties of the level claimed.

Judges compare your concrete tasks with the agreement’s definition of the level. An isolated task or occasional help is not enough: you need to show a habitual practice over the whole period claimed.

• Emails, reports and signing authority in your name
• Organisation charts, rotas and internal notes presenting you in the role
• Annual review reports and the objectives set for you
• Written statements from colleagues or clients on what you do

Your payslip (bulletin de paie) must state the branch collective agreement that applies, your job and your position in the agreement’s classification, in particular the level or grade coefficient given to you (Labour Code, article R3243-1, points 3 and 4). These details usually appear in the header, near your name.

Note them on every payslip of the period claimed: a change of coefficient, or no change while your duties changed, shows when the gap began. Then compare your gross base salary with the minimum of the level claimed for that month, since grids are raised by amendment. According to service-public.fr (2026), the gross French minimum wage (Smic) has been 1,867.02 € a month for 35 hours since 1 June 2026: if the grid minimum is lower, the Smic is the floor.