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thg Luxemburg

No borders between us

thg Luxembourg is a reference in the North of the Grand Duchy. Created almost 30 years ago, our office has been through significant expansion and successfully supports companies wishing to establish themselves in the Belgium-Luxembourg border zone. Our employees originate from the same region as our clients, our office is actively involved in the development of our territory: not surprisingly, we know very well the challenges that our clients have to face every day.

Until 2016, our company operated under the name of Fidunord. Simon Boskin joined the shareholders four years earlier. Since then he has shared the management of the largest office of thg with Erwin Schröder, who developed the office and has managed it since 1990.

Responding to your needs

Our clients are mainly confronted with problems linked to their proximity to the border between Belgium, Germany and the Grand Duchy. In which country are their profits taxed? Which social legislation must be applied? What are the formalities to comply with for mobility of the workers? Who will pay the pensions? How to benefit from grants for developing activities, where to go to obtain them?


We reply to all these questions (and many others) via different services. Expert accounting, tax advice, social secretariat, consulting on labour law, intellectual property and the protection of your data. In all circumstances, you can count on us.


A head start

Our experts reply to the questions that you ask every day. Their contribution translates into a truly measurable added value, both in terms of revenue and expenditure. Naturally, our consultants master the different languages spoken in the region, and they are very familiar with the laws and regulations in force on each side of the border. 

A wide network of specialists

All the employees of thg Luxembourg have access to a wide network of active specialists within thg. We are able to respond to all your questions, whether they are about the creation or the acquisition of a company, questions related to commercial law, consolidation, estate planning, EU regulations or requests for aid at a national or European level.


Furthermore, our staff are in regular contact with external partners: banks, lawyers, notaries, ICT specialists or experts in interaction with authorities. All of them at your service.


Quality, prudence & foresight

Each member of our team fully adheres to the values and the philosophy of thg. Quality and reliability as well as prudence and foresight are all part of our DNA. This allows our clients to focus on their core business and in all circumstances, to stay ahead of the events. The quality of our work contributes to the security and prosperity of your activity.


1-3 Om Knupp | L-9991 Weiswampach
Tel.: +352 26 99 73 41 | Fax: +352 26 99 73 49 | Mail:
Our local offices

With over ten offices in Belgium and the Grand Duchy of Luxembourg, thg is well-established. This territorial coverage ensures a maximum of trust and efficiency. Find your local office!

Our management

The managers of thg have deliberately opted for close-to-the-customer service capabilities. That’s why we have a wide network of offices located in the main cities of the French- and German-speaking part of Belgium as well as in the Grand Duchy of Luxembourg. Each office can leverage upon internal and external experts in all areas of modern company management. Our management is at the customer's side.

Our clients
thg is a medium-sized accounting and tax firm serving more than 2,500 clients locally and internationally. Are you a free-lancer, at the head of a start-up or an executive of a company active on the domestic or international market? At thg, we understand your business issues and share your daily reality, whatever it may be. Whether they are big or small, local or international - we serve our customers with care and foresight.
Our values, our philosophy
At thg, client satisfaction is always our ultimate goal. We analyse our client's situation and help solving their business issues with added-value advise tailored to each specific situation. Our motivation is to provide you high quality services and to establish a reliable relationship based on respect and trust. With caution and foresight, we always have an eye on your goals.
A success story since 1983
Joseph Faymonville created his fiduciary in 1983 in his region of origin, on the border between Belgium, the Grand Duchy of Luxembourg and Germany. Today thg has more than 150 highly qualified employees and about 20 external partners. We are established in all the big cities of Wallonia as well as in the Grand Duchy of Luxembourg. 2500 clients benefit from our wide range of services. More about our history.