Declaration of posted work and country of establishment of the posting business
Business established in an EU Member State or a country treated as such
A business established in an EU Member State or a country treated as such may post workers to Luxembourg for the provision of occasional and temporary services.
The following are considered to be countries treated as EU Member States:
- Iceland, Liechtenstein and Norway as signatories of the European Economic Area Agreement;
- the Swiss Confederation.
Businesses established in third countries
A business established outside the European Union may be authorised to post workers to Luxembourg to provide transnational services.
The service may be provided:
- either to a private person or to another business (subcontracting);
- or between the posting business and another business belonging to the same group.
Social security for posted workers
Depending on the place of establishment of the posting business, the administrative formalities for posted workers with regard to the registration for social security may vary.
A difference must be made between:
- businesses established in the EU;
- businesses established in a country treated as an EU Member State;
- businesses established in a country that has signed an agreement with Luxembourg;
- businesses established in a country with no agreement with Luxembourg.
Conditions of residence and stay for posted workers in Luxembourg
The conditions of residence and stay in Luxembourg during the posting depend on the country of establishment of the posting business and the nationality of the posted workers.
Workers who are posted by an EU business must therefore hold:
- an ID card or passport if they are a EU citizens;
- a passport and a residence permit if they are third-country nationals. Within 3 months of arrival in Luxembourg, third-country nationals must apply for a residence permit for a worker from a service provider established in the EU.
Posted workers from businesses established in third countries must hold:
- an ID card or passport if they are a EU citizens;
- a temporary residence certificate, a passport and a visa if they are third-country nationals. Within 3 months of arrival in Luxembourg, third-country nationals must apply for a residence permit for posted worker.
Luxembourg labour law and posted workers
When a foreign business posts its workers to Luxembourg, it is required to comply with the legal provisions concerning Luxembourg labour law.
These provisions namely apply to:
The minimum conditions in Luxembourg with regard to social minimum wage and leave must be complied with unless the posted work is for work concerning the initial setup or first installation as part of a supply contract. The work:
- must be essential for the proper functioning of the good supplied;
- must be carried out by qualified or specialised staff;
- cannot exceed 8 calendar days over a period of 12 months;
- must not be in relation with construction work.
The installation work is nevertheless subject to a declaration of posted work.
Taxation of posted workers
Determining the place of taxation
The tax residence of posted workers and the duration of their posting will determine if the salaries received are subject to income tax in the country of origin and/or in Luxembourg.
In principle, the person is a tax resident in the country where he has his permanent place of residence.
The place of taxation is determined by international tax treaties signed between the country where the posted worker has his place of residence and Luxembourg.
Taxation in the country of origin
As a general rule, the salary will be taxable in the country where the worker has his main place of residence provided the following 3 cumulative criteria are met:
- the total duration of temporary stay in Luxembourg must not exceed 183 days.
The manner in which the 183 days are counted depends on the tax treaty applied, e.g. if the place of residence is:
- France: the duration of each assignment must not exceed 183 days, even if the total duration of the posted work in a year exceeds 183 days;
- Belgium or Germany: maximum 183 days in total per calendar year;
- the remuneration of the posted worker must be paid by an employer established outside of Luxembourg;
- the remuneration must not be paid by a permanent establishment in Luxembourg.
Whenever one of these conditions are not met, the salary paid to the worker for work carried out in Luxembourg becomes taxable in Luxembourg.
Taxation in Luxembourg
Salaries paid for work carried out in Luxembourg become taxable in Luxembourg when:
- one of the cumulative conditions detailed above is not met or;
- there is no tax treaty between the country where the posting business is established and Luxembourg or:
- the posted worker has established his tax residence in Luxembourg, i.e.:
- he has a permanent place of residence in Luxembourg (as well as his vital interests, i.e. social and family ties, cultural and political activities, etc.) or;
- he has his main place of residence in Luxembourg (at least 6 months per year).
In the case where the employee is taxed in Luxembourg, the employer must:
Businesses in Luxembourg receiving posted workers
In the event of a posting of a third-country national in the framework of a provision of services, the business or the client where the worker will be posted must:
- verify the posted worker’s temporary residence certificate/permit before the worker undertakes any work;
- request a copy of the posted worker’s temporary residence certificate/permit and keep said copy for the whole duration of the assignment.
Employers who illegally employ one or more posted workers from third countries with no valid residence certificate or permit may face administrative and criminal sanctions.