Belgium’s Federal Public Service (SPF) Finance has announced the launch of the Biztax e-service for filing corporate tax returns for the 2025 assessment year (2024 tax year).

The deadline for filing returns with financial year-end dates between 31 December 2024 and 28 February 2025 (inclusive) is 30 September 2025.

If you submit your return by 29 August 2025, and it results in a refund, we will prioritise its processing. Therefore, you will receive the refund—except in exceptional cases—by the end of December 2025.