Singapore Updates Guidance on Registration for Multinational Enterprise Top-up Tax and Domestic Top-up Tax with New FAQ on Side-by-Side Package

The Inland Revenue Authority of Singapore (IRAS) has updated its guidance on Registration for Multinational Enterprise Top-up Tax and Domestic Top-up Tax. The main guidance update is the addition of a new FAQ in relation to the Side-by-Side package released by the OECD in January 2026:

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In view of the Side-by-Side (SbS) package released by the OECD on 5 Jan 2026, in particular where the United States has obtained the Qualified Status for the SbS Safe Harbour, is a MNE group with its UP…