Each month, employers must declare to the Social Security Centre (Centre commun de la sécurité sociale - CCSS) the gross wages paid to their employees and the exact number of paid hours of work for the previous month.
Based on these declarations, the CCSS calculates the amount of social security contributions for each employee and informs the employer by means of a monthly account statement (the CCSS 'invoice') of the total amount of social security contributions to be paid for all employees. This amount includes both the employee's and the employer's share of the social security contributions.
The social security contributions due by employees are deducted directly from their wage by the employer, who is responsible for the overall payment demanded on the monthly invoice sent by the CCSS.
Wage elements to declare
The monthly wage to be declared comprises different elements:
- base wage;
- supplements/accessories payable monthly in cash;
- payment for overtime hours, excluding surcharges on these hours;
- gratuities, financial participation, benefits in cash or in kind;
- unemployment due to extreme weather/cyclical economic factors;
- short-time work.
Elements to be declared by the employer | Health insurance - cash benefits | Health insurance - healthcare | Mutual insurance | Pension | Work accident | Dependency | Occupational health |
---|---|---|---|---|---|---|---|
Base wage | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Supplements/accessories payable monthly in cash | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Payment for overtime hours, excluding surcharges on these hours | No | Yes | No | No | No | Yes | No |
Gratuities, financial participation, benefits in cash or in kind | No | Yes | No | Yes | Yes | Yes | Yes |
Unemployment due to extreme weather/cyclical economic factors; short-time work | Yes | Yes | Yes | Yes | No | Yes | No |
Explanations of the various wage elements
The base wage is fixed and, under labour law, must be defined as such in the employment contract. It includes:
- supplements for which the amount remains fixed from one month to the next (e.g. family allowance, training bonus paid to employees who completed certain vocational training courses, responsibility bonus, etc.);
- legal increases in accordance with public policy provisions on minimum social wage and the automatic adjustment of wages in line with changes to the cost of living;
- regular surcharges set out in employment contracts or collective labour agreements.
Supplements/accessories are elements of cash remuneration and payable monthly, but their amount may vary from one month to the next (e.g. performance bonus, commission, target-related bonus, etc.). They should not be confused with occasional wage elements such as gratuities.
Payment for overtime hours without surcharges (100%) and the corresponding hours are to be reported separately. Surcharges on overtime hours (40%) are not declared.
Unpaid overtime hours compensated instead by paid leave or recorded in a time savings account have not to be reported under this heading, but when otherwise compensated (e.g. as base wage if compensated by extended leave).
Gratuities, financial participation and benefits in cash and in kind are cash payments that are not payable monthly, as well as all payments in kind.
Unemployment due to extreme weather or cyclical economic factors, as well as related hours should also be declared.
The same applies for short-time work which must also be declared in the 'unemployment due to extreme weather/cyclical economic factors' section. These hours should be reported under the heading 'hours unemployed'. This declaration is needed for the National Employment Agency (Agence pour le développement de l'emploi - ADEM) to calculate the short-time work adjustment.
Income from savings and interest relief granted to employees by the employer, meal allowances (public sector) and meal vouchers (private sector) are not subject to contributions and do not have to be declared.
Additional Information
For periods prior to 2020, the employer had to declare the number of hours of work that actually corresponded to the base wage (and not automatically the monthly average of 173 hours). This only included the hours actually worked by the employee, but excluded overtime hours, hours of absence due to incapacity for work paid by the National Health Fund, and legal public holidays which the employee did not or would not have worked.
From 1 January 2020, the employer must declare the exact number of hours of work that actually correspond to the base wage (and not automatically the monthly average of 173 hours). This includes the paid hours of work corresponding to the base wage, annual leave, absences due to incapacity for work paid by the employer, legal public holidays, but excludes overtime hours. When applied to hours of work, the commercial rounding rule involves rounding up the hours of work if the number of minutes reaches or exceeds 30 minutes and rounding down if the number is below 30 minutes.
For more information, please see the hours of work example calculation.
Overtime hours, hours of unemployment due to extreme weather or cyclical economic factors and short-time work hours are entered under separate headings.
The hours corresponding to incapacity for work paid by the employer, as well as those corresponding to annual leave, also count as hours of work that must be declared. If an employee is granted a phased return to work for therapeutic reasons paid by the employer (which is very rare, as such therapeutic returns are normally paid by the CNS), the hours of work and corresponding hours of incapacity for work must be declared.
However, hours of absence due to incapacity for work paid by the CNS should not be included in the hours of work declaration.
The hours of work to be declared correspond to the company's internal schedule.
For example, for an employee who works 40 hours per week from Monday to Friday, the hours to be declared are set out in the tables below:
month | hours | work days |
---|---|---|
January 2025 | 184 | 23 |
February 2025 | 160 | 20 |
March 2025 | 168 | 21 |
April 2025 | 176 | 22 |
May 2025 | 176 | 22 |
June 2025 | 168 | 21 |
July 2025 | 184 | 23 |
August 2025 | 168 | 21 |
September 2025 | 176 | 22 |
October 2025 | 184 | 23 |
November 2025 | 160 | 20 |
December 2025 | 184 | 23 |
Calendars of the previous years
month | hours | work days |
---|---|---|
January 2024 | 184 | 23 |
February 2024 | 168 | 21 |
March 2024 | 168 | 21 |
April 2024 | 176 | 22 |
May 2024 | 184 | 23 |
June 2024 | 160 | 20 |
July 2024 | 184 | 23 |
August 2024 | 176 | 22 |
September 2024 | 168 | 21 |
October 2024 | 184 | 23 |
November 2024 | 168 | 21 |
December 2024 | 176 | 22 |
month | hours | work days |
---|---|---|
January 2023 | 176 | 22 |
February 2023 | 160 | 20 |
March 2023 | 184 |
23 |
April 2023 | 160 | 20 |
May 2023 | 184 | 23 |
June 2023 | 176 | 22 |
July 2023 | 168 | 21 |
August 2023 | 184 |
23 |
September 2023 | 168 | 21 |
October 2023 | 176 | 22 |
November 2023 | 176 | 22 |
December 2023 | 168 | 21 |
month | hours | work days |
---|---|---|
January 2022 | 168 |
21 |
February 2022 | 160 |
20 |
March 2022 | 184 |
23 |
April 2022 | 168 |
21 |
May 2022 | 176 |
22 |
June 2022 | 176 |
22 |
July 2022 | 168 |
21 |
August 2022 | 184 |
23 |
September 2022 | 176 |
22 |
October 2022 | 168 |
21 |
November 2022 | 176 | 22 |
December 2022 | 176 |
22 |
month | hours |
work days |
---|---|---|
January 2021 | 168 |
21 |
February 2021 | 160 |
20 |
March 2021 | 184 |
23 |
April 2021 | 176 |
22 |
May 2021 | 168 |
21 |
June 2021 | 176 |
22 |
July 2021 | 176 |
22 |
August 2021 | 176 | 22 |
September 2021 | 176 |
22 |
October 2021 | 168 |
21 |
November 2021 | 176 |
22 |
December 2021 | 184 |
23 |
month | hours |
work days |
---|---|---|
January 2020 | 184 |
23 |
February 2020 | 160 |
20 |
March 2020 | 176 |
22 |
April 2020 | 176 |
22 |
May 2020 | 168 |
21 |
June 2020 | 176 |
22 |
July 2020 | 184 |
23 |
August 2020 | 168 |
21 |
September 2020 | 176 |
22 |
October 2020 | 176 |
22 |
November 2020 | 168 |
21 |
December 2020 | 184 |
23 |
month | hours |
work days | legal holidays |
---|---|---|---|
January 2019 | 176 | 22 | 1 |
February 2019 | 160 | 20 | 0 |
March 2019 | 168 | 21 | 0 |
April 2019 | 168 | 21 | 1 |
May 2019 | 160 | 20 | 3 |
June 2019 | 152 | 19 | 1* |
July 2019 | 184 | 23 | 0 |
August 2019 | 168 | 21 | 1 |
September 2019 | 168 | 21 | 0 |
October 2019 | 184 | 23 | 0 |
November 2019 | 160 | 20 | 1 |
December 2019 | 160 | 20 | 2 |
* as at least one holiday of the applicable month is on a saturday or sunday, this day is not taken into account in the heading "legal holidays".
month | hours |
work days | legal holidays |
---|---|---|---|
January 2018 | 176 | 22 | 1 |
February 2018 | 160 | 20 | 0 |
March 2018 | 176 | 22 | 0 |
April 2018 | 160 | 20 | 1 |
May 2018 | 160 | 20 | 3 |
June 2018 | 168 | 21 | 0* |
July 2018 | 176 | 22 | 0 |
August 2018 | 176 | 22 | 1 |
September 2018 | 160 | 20 | 0 |
October 2018 | 184 | 23 | 0 |
November 2018 | 168 | 21 | 1 |
December 2018 | 152 | 19 | 2 |
* as at least one holiday of the applicable month is on a saturday or sunday, this day is not taken into account in the heading "legal holidays".
Benefits liable to contributions paid after termination of an employment contract
Statutory benefits payable by the employer in lieu of notice
Statutory benefits payable by the employer in lieu of notice are liable to contributions and counted for the monthly payment they represent. Each month of notice counts as one month of declaration. However, other severance benefits are not subject to contributions and do not extend the affiliation.
Payment in lieu of holiday and gratuities
Non-regular payments such as payment in lieu of holiday and gratuities paid after the start of pension entitlement relating to activity carried out prior to this entitlement are not subject to contributions and should, therefore, not be declared to the CCSS.
3-month goodwill benefit for survivors of a deceased employee in active employment
The affiliation ends with the death of the employee but, under certain conditions, their survivors (spouses, partners, children and forebears) are entitled to the continuation of the wage payment due at the end of the month in which the employee died, as well as a benefit equal to 3 months' wage payments. These benefits do not have to be declared to the CCSS.
How to proceed
Wage declaration
Employers (or their authorised representative) submit monthly declarations of the various wage elements either:
- electronically via SECUline ('DECSAL')
or
- using the payroll (instructions) sent each month to the employer or their authorised representative, where applicable.
The payroll pre-printed by the CCSS to declare wages for month N is sent at the start of month N+1. For each insured employee, it reproduces the information declared by the employer for the previous month.
The employer must return the payrolls to the CCSS within 10 days; they must also check the accuracy of the pre-printed data and make any necessary corrections.
Employers using the online SECUline procedure are notified of a missing wage by a SALMAN file.
Fines for late declarations
For each undeclared wage, the employer is liable to be fined on a quarterly basis.
In case of non-declaration of wages, the wage estimation - generally based on the last declared wage - is validated when the fine is imposed. Having been notified to this effect, and in the event of disagreement over the wage taken into account, the employee can request an adjustment. Similarly, the employer has the possibility to adjust the wage.