The glossary to understand and take action

Registration

Registration enters a company or entity in the competent register according to its status and the applicable rules.

Démarche et formalité · Luxembourg Fiduciaries Editorial Team · Reviewed on

Understand the scope

What is this process for?

It must be distinguished from authorisation to carry on business, VAT registrations and social security affiliations. Keep the acknowledgement and verify the information actually recorded.

In your file

How to prepare the process

Registration is an entry in a register or with a specified body. It is always necessary to specify which one: the RCS, VAT and social security do not serve the same purpose. A company may need to complete several separate procedures and receive several identifiers. The file should therefore link each number to the body, the entity and the corresponding evidence, and then provide for the declaration of relevant changes.

A scenario to help you understand

Educational example

A company receives its RCS number. It separately verifies its VAT and social security obligations before using that number as proof that all start-up procedures have been completed.

Fictitious situation, presented to illustrate the concept.

Prepare for what comes next

Points to check

  • Nommer le registre concerné
  • Conserver la confirmation et l’identifiant
  • Vérifier les mises à jour nécessaires

The practical question

Find out more

L’immatriculation remplace-t-elle les inscriptions fiscales et sociales ?

Chaque inscription a un objet différent. Le RCS identifie et publie certaines informations, tandis que la TVA et la sécurité sociale répondent à d’autres obligations. Établissez une liste des démarches correspondant à l’activité et au personnel prévu. Une référence reçue d’un organisme ne prouve pas que tous les autres dossiers sont ouverts et correctement paramétrés.

Connecting concepts

Terms to know as well

Continue with the concepts, contacts and procedures related to this topic.

RCSThe Trade and Companies Register (RCS), managed by Luxembourg Business Registers, centralises registrations and filings for the persons and entities concerned.VAT numberThe VAT number identifies a person for their value added tax obligations within the relevant system.Operational declaration with the CCSSA procedure enabling a company to register as an employer with the CCSS.SARLAn SARL is a private limited liability company whose organisation and shareholders’ rights are governed by law and the articles of association.ShareholderA shareholder holds rights in a company by virtue of their participation in the capital or under the rules of the relevant legal form.ManagerThe manager performs the management and representation functions assigned to them within the company.

Put it into practice

Explore further with our guides

Practical guideSetting up an SARL in Luxembourg: steps and documents to prepare

Sources and verification

References consulted on 20 September 2026. Official procedures specify the applicable conditions and exceptions.

This guide explains a general process. The applicable rules depend on your situation; it does not constitute personalised advice. Report a correction.

A definition gives you a reference point. To examine your situation, clarify your question with a professional.