A SIRET number is a unique identification number used to identify businesses and their individual establishments in France. It is essential for any company conducting business or operating in the country, whether it’s a French company or a foreign entity with a branch in France.
What does SIRET stand for?
SIRET stands for “Système d’Identification du Répertoire des Établissements,” which translates to “Identification System for Directory of Establishments.” The number is assigned by the French National Institute of Statistics and Economic Studies (INSEE).
Structure of the SIRET Number
A SIRET number is composed of 14 digits and is essentially made up of two parts:
- SIREN Number (9 digits): The first nine digits represent the company’s SIREN (Système d’Identification du Répertoire des Entreprises), which is the main identification number for the business entity.
- NIC Code (5 digits): The next five digits form the NIC (Numéro Interne de Classement), which identifies the specific establishment or branch of the company. This means each branch or office can have a unique SIRET, even if it’s part of the same company.
Purpose
- The SIRET number is required for administrative, legal, and financial processes in France, such as invoicing, registering with social security, filing taxes, and entering into contracts.
- It is used to track the activities of individual establishments of a business, ensuring that even separate branches or units are identified.
Practical Use
If you’re working with a French business or setting up an operation in France, you will often need to provide the SIRET number when entering into contracts or carrying out official transactions.

