Entity Setup
Global Minimum Tax Rules: How Singapore & Malaysia Entity Structuring is Being Affected
With GloBE rules and Domestic Top-up Tax taking effect, entity-setup and profit allocations are under scrutiny—understand how structures are changing.
By NomadicTax Research Team • 5-8 min read • August 19, 2026
## What are the GloBE rules and Domestic Top-up Tax (DTT)?
Under Pillar Two of the OECD Base Erosion & Profit Shifting (BEPS) framework, **Global Anti-Base Erosion (GloBE) rules** aim to ensure multinational enterprise (MNE) groups pay a **minimum effective tax rate (ETR)** of **15%**. Entities in jurisdictions with lower ETRs may become subject to a **top-up tax**. ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai)) Singapore has legislated the **Multinational Enterprise (Minimum Tax) Act 2024**, which includes both **Income Inclusion Rules (IIR)** and a Domestic Top-up Tax (DTT). ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai))
## Key timing & safe harbours in Singapore
- The Transitional Country-by-Country Reporting (CbCR) Safe Harbour is extended to financial years beginning **on or before 31 December 2027**, not ending after **30 June 2029**. ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai))
- Singapore is introducing a **Substance-based Tax Incentive Safe Harbour** and a **Side-by-Side Safe Harbour**, effective for financial years **starting 1 January 2026**. ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai))
- A Simplified ETR Safe Harbour will apply from **31 December 2026**. ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai))
## Malaysia’s position & GMT implementation
- Malaysia has published **guidelines** on the GloBE rules and Domestic Top-up Tax (known locally as GMT—Global Minimum Tax), included as part of the Income Tax Act amendments effective recently. ([hasil.gov.my](https://www.hasil.gov.my/media/1bmkuhsi/faq-ver-70_23042026.pdf?utm_source=openai))
- These include FAQ documents guiding companies on how to compute adjusted revenues, apply safe harbours, and interpret terms like “qualified domestic minimum top-up tax”. ([hasil.gov.my](https://www.hasil.gov.my/media/1bmkuhsi/faq-ver-70_23042026.pdf?utm_source=openai))
## Structuring entities under these regimes: What to watch out for
- **Effective Tax Rate (ETR)**: If your entity’s operational structure results in a low tax rate (<15%), it may attract top-up under IIR or DTT in Singapore, or GMT rules in Malaysia.
- **Substance requirements**: To benefit from safe harbours, entities must have sufficient substance—in terms of staff, premises, operations. Shell companies risk losing favorable status. ([iras.gov.sg](https://www.iras.gov.sg/taxes/pillar-2-top-up-taxes/global-anti-base-erosion-%28globe%29-rules-and-domestic-top-up-tax-%28dtt%29?utm_source=openai))
- **Allocation of group revenues**: Consolidated group accounting, intercompany pricing, cross-border flows all matter. Revised definitions in Singapore adjust thresholds for excluded equity gains or losses, portfolio shareholding, etc. ([iras.gov.sg](https://www.iras.gov.sg/docs/default-source/uploadedfiles/pdf/multinational-enterprise-top-up-tax-and-domestic-top-up-tax---consolidated-updates-and-amendments.pdf?Status=Master&sfvrsn=f444d004_6&utm_source=openai))
## Example: Startup vs Multinational Subsidiary
- A Singapore-registered tech startup with low profit margins now benefits from higher CIT rebates—but under GloBE, if its ETR falls below 15%, any parent company under the group might see a top-up charge. Structuring costs and incentives to ensure qualifying safe harbor status becomes critical.
- A regional enterprise in Malaysia with operations across SEA should use Malaysia’s GMT guidelines early to anticipate compliance burdens—e.g. map revenue, deductible expenses, foreign income, to prevent surprises especially when operating in low-tax jurisdictions.
## Actionable insights
1. **Audit your current effective tax rates** across jurisdictions in your group—simulate GloBE/IIR scenarios.
2. **Ensure robust substance**: especially for tax incentives, substance-based safe harbours, and to resist aggressive BEPS-style adjustments.
3. **Align intercompany transactions** with OECD’s model rules—transfer pricing becomes more central.
4. **Monitor legislation in other ASEAN members**: As more adopt GMT/DTT/GloBE-type rules, cross-jurisdictional risk (double taxation, compliance mismatch) increases.
**Takeaway**: With global minimum tax norms becoming binding, entity setup is no longer just about choosing low tax havens—it’s about aligning with global expectations, ensuring substance, and navigating increasingly complex compliance regimes.