International businesses in Belgium received some welcome news this month. The Belgian tax authorities finally acknowledged the immense complexity of the new global minimum tax rules. Consequently, officials decided to push back the filing deadlines for the first Pillar Two returns. This move provides much-needed breathing room for multinational enterprises (MNEs) struggling with data collection.
Originally, firms had to submit their domestic reports by June 2026. However, the authorities have now officially moved this date to September 30, 2026. This extension applies specifically to the Qualified Domestic Minimum Top-up Tax (QDMTT) and the Income Inclusion Rule (IIR).
The recent update includes several critical points for your compliance team:
The new September deadline covers all fiscal years ending between December 2024 and September 2025.
The authorities still expect the global GloBE Information Return (GIR) by the original June 30 deadline.
Officials are currently finalizing the official electronic filing platform for these new tax forms.
Each Belgian entity must now settle its own tax liability via the MyMinFin portal using specific communication codes.
In conclusion, this three-month grace period offers a vital window for accurate calculations. You should use this time to verify your effective tax rate and avoid costly errors. Finally, keep a close eye on further technical instructions from the Ministry of Finance to stay fully compliant.