When entering or leaving Belgium from or to another EU member state, both accompanied and unaccompanied liquid assets above a value of 10,000 euros must be declared if requested by customs.
In this case only cash and negotiable bearer instruments are considered as liquid assets. Gold does not have to be declared.
As of 4 September 2021, new declaration forms are applicable for movements within the European Union.
You can consult the new declaration forms for liquid assets when entering or leaving Belgium from or to another EU member state below:
Dutch:
Aangifte van begeleide liquide middelen (PDF, 384.64 KB)
Aangifte van begeleide liquide middelen – extra blad (PDF, 306.53 KB)
Aangifte van onbegeleide liquide middelen (PDF, 426.92 KB)
Aangifte van onbegeleide liquide middelen – extra blad (PDF, 279.62 KB)