
Belgium Issues a Consultation on the Pillar Two IIR Top-up Tax Return
On March 19, 2026, Belgium issued a Consultation on the Pillar 2 IIR Top-Up Tax Return.
If the investment entity is treated as tax transparent in the owner’s jurisdiction anyway, then for tax purposes the income of transparent entities is taxed on the underlying owners. However, for accounting purposes, these entities would generally have their own financial accounts.
Given the GloBE rules rely on financial accounting information, specific additional rules are required to correctly allocate the income of transparent entities in a way that reflects most domestic tax treatment.
If special rules weren’t in place and the tax transparent entity was treated as having GloBE income and covered taxes under the standard GloBE rules, its ETR would often be zero and top-up tax would be due.
The purpose of this is again to try and align the GloBE rules with typical domestic tax treatment.
Investment funds are frequently tax-neutral entities under domestic law, with jurisdictions essentially looking to put investors into the fund in the same position for tax purposes as if they had made a direct investment.
Key amendments to the general GloBE rules are:
• Firstly, the financial accounting net income or loss of a transparent entity or reverse hybrid is reduced by any amounts due to owners that aren’t members of the MNE group.
This is necessary as the GloBE ETR of the group members won’t include income or taxes paid by non-group members.
• Secondly, if the transparent entity or reverse hybrid carries our business through a PE, this needs to be deducted from the accounting income of the transparent entity or reverse hybrid, given that permanent establishments (PEs) are treated as separate constituent entities for GloBE purposes.
• Finally, any remaining amount of the financial accounting income or loss is allocated to the owners if the entity is a transparent entity (based on their ownership interest).
This can flow up the chain if there are a number of transparent owners.

On March 19, 2026, Belgium issued a Consultation on the Pillar 2 IIR Top-Up Tax Return.

On March 19, 2026, Switzerland opened up its GIR Filing Portal. Download our Swiss GIR Filing Checklist.

On March 19, 2026, Switzerland opened up its GIR Filing Portal.

On March 10, 2026, Montenegro published its law to implement a global minimum tax (QDMTT) in its Official Gazette.

On March 17, 2026, Spain’s Navarra region published Decree 13/2026, of February 25. 2026 in its Official Gazette. This approves the Global Minimum Tax Regulations for the Navarra Region and applies to tax periods beginning on or after December 31, 2023

On March 12, 2026, Australia updated its guidance on Lodging, paying and other obligations for Pillar Two.

On March 10, 2026, Liechtenstein issued a proposal (for consultation) to amend its Minimum Tax Act to enable it to implement the January 2026 OECD Side-by-Side Tax Package.

On February 12, 2026, Finland issued a draft law to implement the OECD Side By Side Tax Package. On March 3, 2026 this was approved by the Parliamentary Finance Committee.

On February 16, 2026, Australia issued the Taxation (Multinational—Global and Domestic Minimum Tax)
Amendment (2026 Measures No.1) Rules 2026, to amend its Global Minimum Tax Rules.
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