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Contributions and social contributions
C3S statement: the declaration campaign is open
Publié le 13 mars 2026 - Entreprendre Public Service / Directorate of Legal and Administrative Information (Prime Minister)
The social solidarity contribution of businesses (C3S) must be declared and paid before 15 May 2026. It concerns companies (private or public) with a turnover of more than 19 million euros excluding taxes.
The C3S, which participates in the financing of old-age insurance, is only due for companies existing in 1er January of the year.
Companies subject to C3S must make their remote declaration and settlement on the site net-companies.fr. It is necessary to register on this site or check its data if necessary.
The declaration can be pre-filled with the information communicated to the Urssaf during the VAT declarations.
The recovery of the C3S is ensured by the Urssaf Provence-Alpes-Côte d'Azur.
Please note
In the event of late payment or declaration, the company will pay an increase of up to 10% of the contribution due.
Where to turn if needed?
For more information on the C3S, please visit our corresponding sheet.
It is also possible to contact Urssaf:
- by telephone, from Monday to Friday from 9 am to 5 pm, at 0 806 804 260 (call not surcharged);
- by e-mail by filling in the Form C3S ;
- by post: Urssaf C3S - TSA 62101 69833 SAINT PRIEST CEDEX 9.