🌍 What is the Global Minimum Tax (GMT)? Why are companies worldwide paying attention?

In recent years, many countries have begun implementing the Global Minimum Tax (GMT),

an international tax rule requiring large multinational enterprises to pay a minimum corporate income tax of at least 15%.

This policy is driven by the OECD and G20

to address profit shifting to low-tax jurisdictions (tax havens).

📊 Key Principles of the Global Minimum Tax

• Applies to multinational companies with global revenue of EUR 750 million or more

• Minimum corporate tax rate: 15%

• If a company pays less than 15% in a certain country,

the parent company’s jurisdiction can impose a Top-up Tax

to bring the total tax rate up to 15%

📌 Simple Example

If a subsidiary pays only 5% corporate tax in a country,

while the minimum required is 15%,

the parent company’s country can impose an additional 10% tax

to reach the 15% threshold

🌏 Current Situation

Several countries have already implemented this, including:

Japan, South Korea, Germany, and Singapore

🇹🇭 Thailand is currently preparing legislation

to align with global tax standards

✅ Good News for Thai Businesses

This rule mainly targets large multinational enterprises

Most local businesses and SMEs

are not directly affected

💼 However,

companies with overseas investments

or multinational structures

should begin understanding and planning in advance

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