Understanding SIRET and SIREN

SIREN and SIRET numbers are unique identification numbers required by businesses operating in France.
The SIREN number is a nine-digit business identification number that remains constant throughout the business’s existence, while the SIRET number is a unique 14-digit identification number assigned to each establishment or branch of a business in France.
Both numbers are issued by the French National Institute of Statistics and Economic Studies (INSEE) and are used for various administrative and fiscal purposes, including TVA registration.
Once registered, a business is issued a VAT number (TVA), which must be included on invoices and other relevant documents.
Registration for SIREN/SIRET is done online or in person at the appropriate Centre des Formalités des Entreprises (CFE), based on your business activity.

Registration