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Contributions and social contributions
C3S Declaration: the declarative campaign is open!
Publié le 20 mars 2025 - Directorate for Legal and Administrative Information (Prime Minister)
The social solidarity contribution of businesses (C3S) must be declared and paid before 15 May 2025. It concerns companies (private or public) with a turnover of more than EUR 19 million excluding taxes.
The C3S, which contributes to the financing of the old-age insurance, is only due for the companies existing at 1er January of the year.
Companies subject to C3S must complete their remote declaration and remote settlement on the site net-companies.fr. It is necessary to register on this site or check its data if necessary.
The declaration may be pre-filled with the information provided to the Ussaf 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 a surcharge up to 10% of the contribution due.
Where to go if you need help?
For more information on C3S, please visit our corresponding card.
It is also possible to contact the Urssaf:
- by telephone at 0 806 804 260 (free of charge);
- by email by completing the C3S form ;
- by post: Urssaf C3S - TSA 62101 69833 SAINT PRIEST CEDEX 9.