Want to employ staff in Belgium?

In case you want to employ staff in Belgium you must register as an employer with the National Social Security Office (NSSO) using the online service Wide. If you wish to appoint mandataries to support you with your administration, use the Mahis online service to mandate them.

In the Wide online service, a company or its mandatary identifies the company as an employer with the NSSO. After registration, company representatives with due access can modify entries or unregister the company as an employer.

There is a non-secured and a secured version of Wide. As an employer, you should use the secured version of Wide in first instance. Only if this is not possible, you can use the non-secured version. Consult the Wide manualfor a step-by-step guide on how to use this online service. You find more information on Wide on the Social security enterprise portal (in French).

Your registration on the social security portal (in French) gives you access to all secure online services on that portal. You will need these services to fulfil your obligations as an employer. One of the secure services is Mahis (in French), which you use to appoint a representative to help you with your administration.

When you register, your company will also automatically receive an e-Box (in French). This is a digital mailbox in which you will receive messages and documents from the social security institutions.


You can also get in touch via our Contact page.