The situation
Supervisory board fees paid by a Dutch and a German company to a Belgian resident
Your client lives in Ghent and has just joined two supervisory boards: a listed Dutch company in Eindhoven and a German AG in Aachen. Each pays an annual fee. She asks how both are taxed, whether either company will withhold anything, and whether she now owes social security in three countries.
The treaty answer is easy to state and slow to confirm. The time goes on each treaty’s exact wording for board members, the German withholding on supervisory board pay, how Belgium relieves the foreign income, and the separate social security rules, where her own work in Belgium matters as much as the boards abroad.
What the research has to settle
The rules behind the answer
- Board fees follow the company
- Under the OECD Model, which most European treaties follow, directors’ fees may be taxed in the state where the paying company is resident. Each treaty defines which board roles its article covers, so the Belgian treaties with the Netherlands and Germany are checked separately.
- Germany withholds on supervisory board pay
- Germany levies a withholding tax on supervisory board remuneration paid to non-residents, deducted by the company. Whether she can or must also file in Germany is a separate question for the research.
- Belgium relieves the fees but still counts them
- As her state of residence, Belgium taxes her worldwide income and relieves fees taxed abroad by the method the treaty sets. Relieved income can still be taken into account in setting the rate on her other income.
- Social security is a separate test
- Regulation 883/2004 decides which single country’s social security applies to someone active in two or more Member States. How each board role is classified, and where she carries on her main activity, decide the result.
How it runs in azta
From the question to the document
The question, as you would type it
Belgian resident joins the supervisory boards of a Dutch NV and a German AG, with fees of €40,000 and €30,000 a year. Where is each fee taxed under the treaties, does either company withhold tax, how does Belgium relieve it, and which country’s social security applies?
You start with
Supervisory board fees paid by a Dutch and a German company to a Belgian resident
- 01
Set out her roles
Describe her boards, the fees and her own work in Belgium. azta searches the Belgian, Dutch and German tax acts, the treaties and the EU social security rules.
Cited research· Free - 02
Read the treaty article
Open each cited provision in the reader, in the original language with its in-force status, and compare how each treaty defines the board roles it covers.
Atlas statute reader - 03
Ask about social security
Ask which country’s legislation applies under Regulation 883/2004 and how each role is classified. azta cites the Regulation and the national rules it relies on.
Cited research· Free - 04
Draft the note
Ask for a note with one section per fee and one on social security. Edit it in Canvas and export it to Word.
Canvas · Ask azta· Pro You send
A note on where each fee is taxed, how Belgium relieves it and which social security applies
What you get
A note on where each fee is taxed, how Belgium relieves it and which social security applies
Client note · draft
Your supervisory board fees from Eindhoven and Aachen
Where the fees are taxed. Under both treaties, fees paid to you as a member of the supervisory board may be taxed in the country where the company is resident. The Netherlands may therefore tax the Eindhoven fee and Germany the Aachen fee. The provisions are cited in the annex.
What the companies will do. The German company will withhold German tax on your fee before paying it; section 2 sets out whether a German return could reduce that tax. Section 3 confirms how the Netherlands taxes the Eindhoven fee and what, if anything, the company withholds.
Belgium and social security. You report both fees in your Belgian return, where they are relieved under the treaties. Your social security position depends on your own work in Belgium and how each board role is classified; section 4 sets out the analysis and what to request in writing.
Outcomes on your numbers
What azta is worth on this task
Pro pays for itself after
11 minutes a month
At €160 an hour, that is all the time Pro (€27 a month) has to take off your desk to cover its price.
Example figures. Replace them with your own.
- Hours back a year
- 25
- Capacity at your rate
- €4,032
- More notes on directors’ fees a quarter
- 1.6
- Return on Pro
- 12.4×
- Research
- Drafting
- Your review
A scenario you set, not a promise. The hours that come back go to another client, or deeper into this one.
Want these numbers on your team’s real workload?
Book a demoSources azta searches here
- Justel
- wetten.overheid.nl
- Gesetze im Internet
- EUR-Lex · Curia
What stays with you
- Her full professional picture in Belgium, which drives the social security answer.
- The returns and filings in each country.
- The advice and your signature.
Frequently asked questions
- Does the answer change for an executive director?
- It can. Treaties differ on whether managing directors fall under the directors’ article or the employment article. Describe the role and azta checks the treaty wording.
- Does azta cover the Belgian side?
- Yes. It searches Belgian legislation through Justel alongside the Dutch and German acts and EU law.
- Does azta calculate the tax?
- No. It researches, cites and drafts. The calculation and the returns stay with you.



