Not tax advice. Computation tools only. Have a professional review before filing.
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tax-calendar/be/be-resident-filing-june-30
BEAll residentsSelf-employed

Individual Income Tax Return

Belgian annual personal income tax return. Paper deadline end of June; online filing extended to mid-July.

Filing deadline

June 30, 2026 (paper) / mid-July (online)

Country
Belgium
Tax year
2025
Official
Tax authority

What is this deadline?

Belgian annual income tax return. Paper deadline typically end of June; online (Tax-on-web) deadline typically mid-July.

How to file

What people miss

  • Indépendants register with a caisse d'assurances sociales and pay quarterly social contributions on top of income tax
  • Professional expenses can be deducted either with a flat rate or actual expenses
  • Regional differences (Flanders / Wallonia / Brussels) affect some deductions and credits

Prepare this return with open-source skills

These skills are in the OpenAccountants repo. Clone them into Claude, Cursor, or any AI agent and they handle the computation.

belgium-vat-return.mdBE

Use this skill whenever asked to prepare, review, or classify transactions for a Belgian VAT return (déclaration périodique TVA / periodieke BTW-aangifte) for a self-employed individual or small business in Belgium. Trigger on phrases like "prepare Belgian VAT return", "Belgian BTW", "déclaration TVA Belgique", "BTW-aangifte", "classify transactions for Belgian VAT", or any request involving Belgium VAT filing. This skill covers Belgium only, standard regime (normal/normal simplifié). Régime forfaitaire, partial exemption, margin scheme, and VAT units are in the refusal catalogue. MUST be loaded alongside BOTH vat-workflow-base v0.1 or later AND eu-vat-directive v0.1 or later. ALWAYS read this skill before touching any Belgian VAT work.

This page is informational only and not tax advice. Verify dates and requirements against the official tax authority before filing.

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