Singapore · Administrative guidance
Singapore previews DTT accounting-period changes and clarifies GIR filing
On 30 October 2026, IRAS published updated minimum-tax guidance covering accounting periods and GloBE Information Return filing. The accounting changes remain early guidance awaiting regulations.
- Official document:
- MTT and DTT e-Tax Guide, Third Edition
- Development date:
- 2026-10-30
Accounting periods
The guide describes changes under Singapore’s Multinational Enterprise (Minimum Tax) Act 2024 and Regulations 2024. The local-financial-accounting-standard baseline test compares Singapore entities’ financial years with the ultimate parent’s consolidated year. The revised test would compare each entity’s accounting period with the period used for it in consolidation. Other LFAS conditions remain relevant.[1]
IRAS envisages the revised test from financial years beginning in 2026, with separate early elections from 2025. Footnote 23 expressly anticipates regulations by December 2026: the guide does not itself enact those changes.[1]
Central filing is conditional
Overseas GIR filing removes the Singapore filing requirement only with an activated exchange relationship; an annual notification remains necessary. Without central filing, relevant GIR sections are filed locally. The guide says exchange relationships are being activated and a list will follow.[1]
Tax teams should map accounting periods and proposed filing routes now, but verify final regulations and applicable exchange arrangements before changing calculation or compliance settings.[1]
Official sources
- [1] Multinational Enterprise Top-up Tax and Domestic Top-up Tax — Third Edition
Inland Revenue Authority of Singapore · Document date: 2026-10-30
Publication page; paragraphs 3.6, 6.4, 8.7.5(b)–(i) and footnote 23 (printed pp17–18); 10.13–10.18 (pp24–25); change log pp35–36. Fresh official alternative read; original non-media path failed. Existing baseline and proposed change distinguished within the guide; no enacted amendment or current exchange-list certification.