Top-up Tax Bill: Implementing BEPS Pillar 2 in Thailand
The Organization for Economic Cooperation and Development/ the Group of Twenty (OECD/G20) has been leading a global effort to address tax avoidance by multinational entities (MNEs) through the Base Erosion and Profit Shifting (BEPS) project. This collaborative initiative involves over 140 member countries and aims to close the gaps in international tax regulations that allow MNEs to shift profits to low-tax jurisdictions, often referred to as tax havens. By exploiting loopholes and inconsistencies, these companies gain a competitive advantage over domestic entities while undermining the fairness and integrity of the tax system.
The BEPS project is divided into two main pillars:
Pillar 1: This pillar focuses on re-allocating profits and taxing rights on large MNE profits to ensure the impartiality of the tax system.
Pillar 2: This pillar introduces a global minimum tax rate of no less than 15% on MNE profits, preventing tax competition by requiring large MNEs to pay taxes at the Effective Tax Rate (ETR).
To implement Pillar 2 of the BEPS project in Thailand, the Revenue Department has conducted a public hearing regarding the drafting of the Top-Up Tax Bill B.E. …. This bill aims to collect top-up tax in accordance with the Global Anti-Base Erosion Rules (GloBE) measure, allocate profits from such taxation to the National Competitiveness Enhancement for Targeted Industries Fund, and provide information on top-up taxpayers to the Thailand Board of Investment (BOI).

Understanding Top-Up Tax
Top-up tax is considered a type of assessment tax separate from income tax. It is collected by low-tax jurisdictions when a Multinational Entity (MNE) has a Net GloBE Income but an Effective Tax Rate lower than 15%. The Net GloBE Income and Effective Tax Rate are calculated according to the provisions of the bill.
Who is Subject to Top-Up Tax?
Constituent entities established in Thailand, which are members of an MNE Group with a collective turnover of the Ultimate Parent Entity (UPE) not less than the equivalent of €750 million in Thai currency, are subject to the top-up tax under the bill. However, certain types of entities may be exempted, including governmental entities, international organizations, non-profit organizations, pension funds, investment funds, real estate investment instruments, and others specified by the Royal Decree to be issued.
Collection of Top-Up Tax
Each constituent entity located in Thailand has the responsibility to submit the following documents to the Revenue Department within 15 months from the last date of the accounting period as imposed by each entity in which the top-up tax is considered.
- Notification reporting information of its MNE Group, information of the constituent entity, and the country where it is located;
- GloBE Information Return; and
- Top-up tax return and payment of the corresponding tax.
The bill empowers assessment officials to assess top-up tax within 10 years from the last date of submitting the GloBE Information Return.

Penalties for Non-Compliance
Taxpayers who fail to pay the required top-up tax after submitting a GloBE Information Return and assessment by the Revenue Department will be subject to a one-time penalty equivalent to the amount of the top-up tax. Additionally, taxpayers who fail to submit a GloBE Information Return and pay the top-up tax will face a penalty equivalent to two times of the top-up tax amount. In addition to the penalties, the bill imposes criminal liability on taxpayers who fail to comply with its provisions and cause damages to the state’s financial stability, such as deliberately submitting false information or making false statements.
Disclosure of Top-Up Tax Information
Under the bill, the competent authority of Thailand, specifically the Director-General of the Revenue Department, is authorized to disclose top-up tax information. However, this disclosure is limited to cases where it serves the national economic and financial stability objectives or complies with international agreements regarding the exchange of information on taxation as per the GloBE measure.
Effective Date
The principle of the bill was published for a public hearing from March 1, 2024, to March 15, 2024. The next step in the process is for the Revenue Department to analyze the impact of the public hearing results and prepare the bill for the cabinet accordingly.
Author: Panisa Suwanmatajarn, Managing Partner.
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