All you need to know about social security contributions of a single-person simplified share business (SASU)

Verified 01 May 2023 - Legal and Administrative Information Directorate (Prime Minister)

Are you thinking of creating or have created a SASU and would you like to know the social security system that applies? We provide you with the necessary information.

We have chosen a list of a few words with their corresponding definitions in order to better understand the social scheme of a single-person simplified share business (SASU):

  • Abatement : flat-rate or proportional reduction applied on the basis of a tax calculation (income, value of property, etc.)
  • Plate : the basis on which the rates of the various contributions and contributions are applied
  • Contribution : tax dedicated to specific projects (CSG: titleContent and CRDS: titleContent dedicated to the financing of Social Security)
  • Contribution : a levy which entitles the holder to social benefits
  • Discount : mechanism for reducing social contributions
  • Nominative social declaration (DSN: titleContent) : Online declaration filed monthly from the payslip. It has to be filled out by all private sector employers.
  • Exemption : exemption from payment of one or more social contributions
  • Per diem : sum of money paid to the employee by the social security in the event of accident, sickness or maternity
  • Employers' share : employers' contributions and social contributions
  • Wage share : contributions and social contributions payable by employees
  • Liable : business who has to pay a social contribution and who has not yet done so

The President of the SASU has the status of an employee: he depends, like the employee, on the general social security system.

Social security contributions linked to the President and paid by the company are the same as those of an executive employee, except unemployment insurance. The President may, however, if he so wishes, take out additional unemployment insurance.

He is covered by sickness and maternity insurance, family allowances, insurance against industrial accidents, basic pension insurance, supplementary pension insurance and pension insurance.

Since the manager is not entitled to unemployment insurance, he does not have to pay the unemployment insurance contribution.

Social contributions and contributions shall be calculated on the following income:

  • Wages
  • Allowances
  • Supplementary social benefits
  • Accident at work Replacement income in case of sickness, maternity or
  • Extra-legal family benefits (additional benefit to the benefits already offered by social security)
  • Cash benefits provided by the Social and Economic Committee (ESC)
  • Benefits in kind such as food and accommodation, provision of professional vehicles for private use

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Less than 11 employees

Social security contributions are payable by the employer and the employee.

It's the employer who withholds the amount social security contributions every month on the payroll of its employees.

He must then declare and pay social contributions by means of the registered social declaration (NSN) not later than the 15th of the following month that of the period of employment concerned:

Nominative Social Declaration (DSN)

The employer has the opportunity to opt for for the quarterly registered social return. The declaration and payment of social security contributions will have to be made not later than the 15th of the first month the following quarter.

The social contributions and contributions due are as follows:

  • Apec Contribution
  • Contribution of family allowances
  • Social security contribution sickness, maternity, invalidity and death insurance
  • Solidarity of Autonomy Contribution (CSA)
  • Workers' compensation contributions
  • Payment to the National Housing Fund (FNAL)
  • AGS Contribution
  • Social Package
  • Freight payment

In addition to these payroll taxes, there are payroll contributions which are directly deducted from the gross salary of the employee.

These contributions include old-age insurance, the general social contribution (CSG: titleContent), the contribution to the repayment of the social debt (CRDS: titleContent), unemployment and supplementary pension contributions.

Between 11 and 50 employees

Social security contributions are payable by the employer and the employee.

It's the employer who withholds the amount social security contributions every month on the payroll of its employees.

He must then declare and pay social contributions by means of the registered social declaration (NSN) not later than the 15th of the following month that of the period of employment concerned:

Nominative Social Declaration (DSN)

The social contributions and contributions due are as follows:

  • Apec Contribution
  • Contribution of family allowances
  • Social security contribution sickness, maternity, invalidity and death insurance
  • Solidarity of Autonomy Contribution (CSA)
  • Workers' compensation contributions
  • Payment to the National Housing Fund (FNAL)
  • AGS Contribution
  • Social Package
  • Freight payment

In addition to these payroll taxes, there are payroll contributions which are directly deducted from the gross salary of the employee.

These contributions include old-age insurance, the general social contribution (CSG: titleContent), the contribution to the repayment of the social debt (CRDS: titleContent), unemployment and supplementary pension contributions.

More than 50 employees paid in the month worked

Social security contributions are payable by the employer and the employee.

It's the employer who withholds the amount social security contributions every month on the payroll of its employees.

He must then declare and pay social contributions by means of the registered social declaration (NSN) not later than the 5th of the following month that of the period of employment concerned:

Nominative Social Declaration (DSN)

The social contributions and contributions due are as follows:

  • Apec Contribution
  • Contribution of family allowances
  • Social security contribution sickness, maternity, invalidity and death insurance
  • Solidarity of Autonomy Contribution (CSA)
  • Workers' compensation contributions
  • Payment to the National Housing Fund (FNAL)
  • AGS Contribution
  • Social Package
  • Freight payment

In addition to these payroll taxes, there are payroll contributions which are directly deducted from the gross salary of the employee.

These contributions include old-age insurance, the general social contribution (CSG: titleContent), the contribution to the repayment of the social debt (CRDS: titleContent), unemployment and supplementary pension contributions.

More than 50 employees whose pay is paid on time

Social security contributions are payable by the employer and the employee.

It's the employer who withholds the amount social security contributions every month on the payroll of its employees.

He must then declare and pay social contributions by means of the registered social declaration (NSN) not later than the 15th of the following month that of the period of work concerned:

Nominative Social Declaration (DSN)

The social contributions and contributions due are as follows:

  • Apec Contribution
  • Contribution of family allowances
  • Social security contribution sickness, maternity, invalidity and death insurance
  • Solidarity of Autonomy Contribution (CSA)
  • Workers' compensation contributions
  • Payment to the National Housing Fund (FNAL)
  • AGS Contribution
  • Social Package
  • Freight payment

In addition to these payroll taxes, there are payroll contributions which are directly deducted from the gross salary of the employee.

These contributions include old-age insurance, the general social contribution (CSG: titleContent), the contribution to the repayment of the social debt (CRDS: titleContent), unemployment and supplementary pension contributions.

You can estimate the amount of social contributions you will have to pay when hiring an employee:

Calculate social contributions for hiring a first employee

Reductions in contributions and social contributions

Business can to benefit from reductions contributions and social contributions according to different criteria:

Exemptions from contributions and social contributions

Business can to benefit from exemptions contributions and social contributions according to different criteria:

  • Exemptions granted because of the location of the business:
  • Exemption for young companies : This is a partial exemption from social security charges in the form of aid for the creation and take-over of a company (ACRE) for companies at the start of their activity
  • Young innovative or academic company (JEI-JEU) : this exemption applies to businesses under 11 years of age who carry out research and development projects (R&D: titleContent)

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