ID 69339119 © Siiixth | Dreamstime.com
Thailand is preparing to implement a global minimum corporate tax rate of 15% starting January 1, 2025. This move is part of the country’s commitment to the Organization for Economic Co-operation and Development’s (OECD) global tax framework aimed at ensuring fair taxation for multinational enterprises (MNEs). The new tax policy will affect businesses with substantial global revenue, aligning Thailand with other nations that have agreed to the global minimum tax initiative.
What Does the Global Minimum Tax Rate Mean for Businesses?
The global minimum tax rate of 15% is set to apply to MNEs with an annual turnover exceeding €750 million (approximately $781 million). These companies will be subject to the “top-up” tax if their operations are taxed at a lower rate in other jurisdictions. This ensures that companies will face a uniform minimum level of tax, regardless of where they operate globally.
Currently, Thailand’s corporate tax rate stands at 20%. However, businesses benefiting from incentives through the Thailand Board of Investment (BOI) can enjoy tax exemptions lasting up to 13 years. Despite this, the introduction of the 15% minimum tax rate will require multinational corporations with operations in Thailand to align with the global tax standards.

PICTURE ID: freepiks.es/
Thailand’s Strategic Tax Incentives
While the global minimum tax will apply, the Thai government is also introducing measures to maintain the country’s appeal as an investment destination. Thailand will convert existing corporate income tax (CIT) exemptions into a reduced CIT rate of 10% for up to twice the remaining exemption period. These changes will be combined with the existing five-year tax reduction period, ensuring that businesses continue to benefit from incentives without compromising the nation’s tax revenue.
These strategic tax policies are designed to balance international tax compliance while maintaining Thailand’s attractiveness to global investors.
Regional Trend: Southeast Asia Joins Global Tax Reform Efforts
Thailand is not alone in this move. Other Southeast Asian nations, including Vietnam, Indonesia, Malaysia, and Singapore, have also committed to adopting the global minimum tax rate by 2026. The collective action across the region underscores the importance of harmonizing tax policies to prevent a race to the bottom in corporate tax rates, which has long been a concern among international tax authorities.

PICTURE ID: freepiks.es/
Compliance and Reporting: What Businesses Need to Know
Businesses affected by the global minimum tax rate will need to comply with a series of reporting requirements set by the Thai Revenue Department. These include submitting a comprehensive set of documents, such as the Global Anti-Base Erosion (GloBE) Information Return and a Thai top-up tax return.
The filing deadline for these reports is set to be 15 months after the ultimate parent company’s fiscal year ends. Companies that fail to comply with these reporting requirements could face significant penalties under the Revenue Code, with noncompliance possibly resulting in criminal liability if deemed willful.
Looking Ahead: Thailand’s Role in Global Tax Reform
Thailand’s decision to implement the global minimum corporate tax rate represents a significant step in global tax reform. By aligning with the OECD framework, Thailand is helping ensure a more level playing field for multinational corporations and preventing harmful tax competition.
This move also reflects Thailand’s effort to maintain its role as a competitive investment hub in Southeast Asia while adhering to international tax standards. With clear incentives for businesses and a structured reporting system, Thailand is positioning itself as a forward-thinking player in the global tax landscape.
As the implementation date approaches, businesses operating in Thailand must prepare for these changes by reviewing their tax strategies and ensuring compliance with the new rules. This development is a crucial part of the ongoing efforts to modernize global tax systems and ensure a fairer distribution of tax revenues worldwide.