- Federal Public Services (the Department supports the other Federal Public Services in federal fiscal matters and takes part in princely and federal missions) :
- Federal Public Service Chancellery of the Prime Minister : http://premier.fgov.be and http://business.belgium.be
- Federal Public Service Foreign Affairs : http://diplomatie.belgium.be
- Federal Public Service Economy, S.M.E.s, Self-employed and Energy : http://economie.fgov.be
- Belgian Foreign Trade Agency : http://www.abh-ace.be
- The Regions (the Department supports the Regions in fiscal matters and takes part in their missions) :
- hub.brussels (Foreign trade department of the Brussels-capital region) : https://hub.brussels/ and http://why.brussels/
- FIT (Flanders Investment and Trade) : www.flandersinvestmentandtrade.com and www.investinflanders.com
- OFI-Awex (Wallonia Export and Foreign Investment Agency) : http://www.wallonia-export.be/ and www.investinwallonia.be
- Federal Public Service Finance : http://financien.belgium.be
- Ruling Department : http://www.ruling.be
- General Administration of Customs and Excise : http://fiscus.fgov.be/interfdanl/nl/site/customs_english.htm
- General Administration of Taxation
- General Administration Expertise and Strategic Support
- Embassies
- Belgian embassies and consulates abroad : https://diplomatie.belgium.be/en/embassies-and-consulates
- Foreign embassies and consulates in Belgium : https://diplomatie.belgium.be/en/embassies-and-consulates
- Chambers of commerce
- Professional federations
- Tax consultants
- ...
