Declaration forms for corporate tax, legal entities tax, and tax for non-residents/companies for 2026 have been published.

The models for the declaration forms related to corporate tax, legal entities tax, and tax on non-residents/companies for the assessment year 2026 (income 2025) have been published in the Moniteur belge.

This AI-generated translation may contain errors and should not be considerd legal advice. For accurate info, refer to the Dutch or French version or consult your Securex Legal Advisor.

This page was updated in response to FPS Finance dated 25 September 2026..

The FPS Finance announced that it has extended until 31 October 2026 the filing deadline for personal income tax returns with specific income submitted via MyMinfin (Tax-on-web) (the original deadline was 16 October 2026).

In addition, the filing deadline for corporate income tax returns, legal entities tax returns and non-resident corporate tax returns has been postponed to 15 October 2026 (the original deadline was 30 September 2026).

Additionally, the tax administration has not yet announced the submission deadlines for the declarations of these taxes. These deadlines, along with the opening date of Biztax, will be confirmed soon.

Once they are available, we will keep you updated through Lex4You.