Belgian and International Tax Law Firm in Brussels (Belgium)

We act tax and
think global.

Assisting you: our role as your top law firm, and not only for Belgium

Tax lawyers

experts in Belgian and international taxation

Advisius is a tax law firm based in Brussels, dedicated to solving the most complex tax issues in Belgium and internationally. Our team of recognised experts assists companies, executives, and individuals in the strategic management of their tax obligations, with a tailored and proactive approach. With an extensive network of peers in Belgium and abroad, we are able to act globally.

Our motto: We act tax and think global.

Thanks to our in-depth knowledge of Belgian, European, and international tax law, we offer innovative solutions that comply with the latest legal developments.

Meet our team

Our areas of expertise
at your service

Transnational and international matters, relating to corporate tax, personal income tax, entity tax, wealth planning

Belgian taxation

Tax rulings
Corporate and personal taxation
Preferential tax regimes
Withholding tax
Estate planning

International taxation

Cross-border structuring
Transfer pricing
Tax residence and expatriation
Double taxation agreements

Tax litigation

Tax audit - tax claim - tax litigation

Services

Why choose Advisius?

Independent firm specializing exclusively in taxation
Recognized expertise in international taxation
Strategic and personalized approach
A strong national and international network of legal experts, able to swiftly provide a full efficient service

French Desk

Discover our dedicated desk

Values

How do we conceive our role?

Contact

Our contact details

Information & News
about tax topics

Discover our news

Stay informed about the latest tax developments in Belgium and internationally. Our lawyers regularly publish analyses of reforms, case law, and administrative practices.