The contribution sociale de solidarité des sociétés (C3S) is an employer's contribution based on the sales of certain companies. It is part of the financing of social protection and is based on a declarative system, This means that companies need to be fully aware of their obligations.
Although its rate is limited, C3S represents a real financial challenge for the structures concerned, particularly when sales are high or business flows are complex.
Critère | Détail |
|---|---|
Seuil d’assujettissement | CA HT > 19 millions d’euros |
Base de calcul | CA HT dans le champ TVA (imposable + exonéré) |
Taux | 0,16 % du CA retenu |
Date limite de déclaration | 15 mai de l’année N+1 |
Platform | net-entreprises.fr |
Organisme gestionnaire | URSSAF Provence-Alpes-Côte d’Azur |
Mode de paiement | Télérèglement exclusivement |
What is C3S?
C3S is a contribution set up to help finance the old-age pension scheme. It is payable by companies whose sales, excluding tax, exceed a legal threshold set at 19 million euros.
Its collection and control are handled by the’URSSAF Provence-Alpes-Côte d'Azur, C3S's national managing body.
Which companies are affected by C3S?
A company is liable for C3S when it meets all of the following conditions:
- It exists in January 1st of the year for which the contribution is due ;
- In the previous year, it achieved a pre-tax sales of over 19 million euros.
If these conditions are not met, no declaration is required.
The information provided by the tax authorities enables the managing body to verify the company's situation. However, the managing body may request additional information, or ask for a declaration to be filed, in order to confirm whether or not a company is liable to tax.
Are there any exemptions?
Some companies may be exempt from C3S, depending on their activity or legal status.
In these situations, the company must be able to :
- Precise identification of the basis for exemption ;
- Passing on supporting documents required, including a copy of the articles of association; ;
- Recall the number of exemption invoked.
How is C3S calculated?
Calculation basis
The C3S base corresponds to sales falling within the scope of sales taxes.
It includes :
- Amounts subject to VAT ;
- Amounts that are subject to VAT but exempt.
On the other hand, certain taxes and contributions provided for in the General Tax Code are excluded of C3S sales.
The C3S base therefore does not automatically correspond to the amounts declared as VAT, which explains the frequent difficulties of interpretation.
The applicable rate
The C3S rate is set at 0,16 % of the sales figure.
Comment calculer sa C3S ?
La formule est simple : C3S due = CA HT retenu × 0,16 %
Exemple concret : une entreprise réalise 50 millions d’euros de chiffre d’affaires HT éligible. Sa C3S sera de 50 000 000 × 0,16 % = 80 000 €.
Attention : la base retenue n’est pas automatiquement égale au CA déclaré en TVA. Certains flux sont inclus dans la base C3S sans être soumis à TVA, et inversement. Une analyse fine de l’assiette est souvent nécessaire pour les groupes avec des activités mixtes.
C3S declaration and payment
Reporting procedures
The C3S declaration is compulsory as soon as the sales threshold is crossed. It is made :
- On line, via the net-entreprises.fr platform; ;
- No later than May 15 of the year after the threshold is exceeded.
Terms of payment
Payment is made exclusively by telesettlement.
Validation of the direct debit mandate does not constitute a payment order: the company must pay the contribution electronically.
Pour approfondir les règles déclaratives et les stratégies d’optimisation de l’assiette, consultez notre webinar dédié à la C3S.
What happens if a declaration is missing or incorrect?
C3S is based on a declaratory principle founded on trust. In return :
- URSSAF can carry out a spot check ;
- In the absence of a declaration, the sales figure may be automatic based on available information ;
- Of surcharges may be applied in the event of non-compliance.
Checks are carried out by correspondence, and mainly concern the consistency and justification of the tax base declared.
Our experts are there for you
Our teams support companies in understanding and securing their C3S obligations, particularly with regard to :
- Analysis of scope and declarable sales ;
- The reliability of the basis of assessment with regard to the applicable rules ;
- Preparing and securing declarative elements; ;
- Support in the event of a request from the managing body or a documentary inspection.
FAQ - Company social solidarity contribution (C3S)
What is C3S?
C3S is a social security contribution payable by companies with pre-tax sales in excess of €19 million. It contributes to the financing of old-age insurance.
Who is liable for C3S?
Any company in existence on January 1 of the year in question and with sales above the legal threshold.
How is C3S calculated?
It is calculated by applying a rate of 0.16 % to a specific sales figure, defined by reference to the rules applicable to sales taxes.
What declarations do I need to make?
C3S declarations and payments must be made online at net-entreprises.fr, by May 15 at the latest.
Are there any C3S exemptions?
Yes, certain companies can be exempted, provided they meet the relevant conditions and supply the necessary supporting documents.
Can C3S be audited?
Yes, URSSAF can check declarations by means of a documentary inspection to ensure the accuracy of declared sales.
Is C3S due in the event of a loss?
Yes, C3S is based on sales, not profits.
Qu'est-ce que la C3S organic sur net-entreprises.fr ?
La C3S organic désigne le module de télédéclaration de la C3S accessible directement sur la plateforme net-entreprises.fr, distinct des autres flux DSN. C’est via ce module que les entreprises assujetties déposent leur déclaration annuelle et procèdent au télérèglement.
Quel est l'abattement applicable à la C3S ?
La réglementation prévoit un abattement forfaitaire sur la base de calcul pour les entreprises dont le chiffre d’affaires est compris entre 19 et 20,5 millions d’euros environ, afin d’atténuer l’effet de seuil. Au-delà, la C3S est calculée sur l’intégralité du CA retenu.
Quelle est la date limite de déclaration et de paiement de la C3S ?
La déclaration doit être déposée au plus tard le 15 mai de l’année suivant celle au titre de laquelle la C3S est due, via net-entreprises.fr. Le paiement s’effectue par télérèglement à la même échéance. La validation du mandat de prélèvement ne vaut pas ordre de paiement.
