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# How do I get an employer registration number in Luxembourg?

Getting an employer registration number (*matricule employeur*) is essential before hiring your first employee in Luxembourg. This number is assigned by the Joint Social Security Centre (CCSS) and is required for all payroll and social security processes.

## Steps to register as an employer

Follow these steps to obtain your employer registration number:

1. **Check if you need a business permit**
* If your business activity is regulated, apply for a business permit (*autorisation d'établissement*) from the Ministry of the Economy first
* Complete this step before proceeding with employer registration

2. **Access the operating declaration**
* Go to the "Documents" page
* Find the operating declaration form

3. **Complete the operating declaration**
* For detailed instructions on completing the form, see: [How do I create an operating declaration on Salary.lu?](https://help.salary.lu/en/article/how-do-i-create-an-operating-declaration-on-salarylu-1t6s6lq/)

Fill out the form with your business details:
* **For individuals:** full name, address, phone number, and national identification number
* **For companies:** company name, registration number (RCS), registered office address, date of incorporation, phone number, and business activity description

| Attach any required supporting documents (e.g., proof of registration in the trade register if not already filed in Luxembourg)

4. **Submit the declaration**
* Send the completed operating declaration to the CCSS via email at [ccss@secu.lu](mailto:ccss@secu.lu)
* Submit before hiring your first employee or within 8 days of the employee's start date

## What happens after registration

### Automatic affiliations

Once registered, you are automatically affiliated with:
* Accident Insurance Association (AAA)
* Employers' Mutual Insurance (MDE)
* Multi-sector Occupational Health Service (STM), unless you provide proof of alternative coverage within three months

### Confirmation and employer number

The CCSS will send you a confirmation letter containing your employer registration number (*matricule employeur*). You will use this number for all future social security and payroll obligations.


|| Registering as an employer is a legal requirement before hiring staff in Luxembourg. Make sure to keep your employer registration number safe, as it will be needed for all payroll and social security tasks.

### Key points to remember

* The employer registration number remains valid as long as your business exists, unless you change its legal form
* Report any changes to your business name, address, or contact details to the CCSS
* Changes do not require a new registration number unless the legal form changes
* The operating declaration for employer registration is separate from the declaration of employment required for each new hire