Foreign tax relief
Belgian tax residents must report their worldwide income on their Belgian resident tax returns. Income that is taxable/taxed/effectively taxed (depending on the wording of the particular treaty) abroad is exempted with progression from Belgian tax (i.e. the foreign income is exempt from taxation in Belgium but is taken into account to determine the marginal tax rate applicable to the other income taxable in Belgium).
Exempted income from Bahrain, China, Congo, France, Germany (employment income only), the Netherlands, Rwanda, San Marino, Singapore, Taiwan, and the United Kingdom is, however, subject to communal taxes in Belgium.
Belgium has concluded a double tax treaty with more than 150 countries.