Thailand has taken another significant step toward greater international tax transparency by signing the Multilateral Competent Authority Agreement on the Exchange of GloBE Information (GloBE MCAA).
The agreement supports the international exchange of tax information relating to large multinational enterprise groups under the Global Anti-Base Erosion framework.
According to Thailand’s Revenue Department, the Cabinet approved Thailand’s participation in the GloBE MCAA on 16 June 2026, and Thailand was subsequently officially listed by the OECD as a signatory on 8 September 2026.
For multinational groups operating in Thailand, this development is particularly important because it forms part of Thailand’s preparation for the international exchange of the GloBE Information Return (GIR).
What Is the GloBE MCAA?
The GloBE MCAA is a multilateral arrangement designed to enable participating tax authorities to exchange information contained in GloBE Information Returns.
The objective is to support international tax administration while reducing unnecessary duplication for multinational groups operating across several jurisdictions.
Rather than requiring the same set of information to be separately submitted to multiple participating jurisdictions, an information-exchange mechanism can allow relevant tax authorities to receive the required information through agreed international channels.
Thailand’s Revenue Department stated that this mechanism is intended to help reduce compliance burdens for large multinational groups while improving transparency and confidence in Thailand’s tax system.
Why Thailand’s Participation Matters
Thailand’s participation reflects the country’s continued integration into international tax cooperation frameworks.
For multinational companies, this means that international tax reporting can no longer be viewed solely as a matter for the head office or parent company.
Thai subsidiaries, branches and related entities within multinational groups should increasingly ensure that their accounting information, tax records and intercompany documentation are consistent with information reported elsewhere within the group.
Key areas that may require attention include:
- Consistency of financial and tax information across jurisdictions
- Identification of group entities and reporting responsibilities
- Reconciliation between statutory accounts and group reporting packages
- Documentation of related-party transactions
- Internal coordination between finance, tax and accounting teams
- Readiness to respond to information requests from tax authorities
GloBE Information Return and Thailand
A key part of the new framework is the GloBE Information Return, or GIR.
The Revenue Department confirmed that Thailand is preparing to exchange GIR information with treaty partners and expects its first exchange to take place by December 2027.
Businesses therefore have time to prepare, but multinational groups should not wait until the first exchange deadline before reviewing their internal systems.
Information used for international tax reporting often originates from accounting records created months or years earlier. Errors in entity classification, accounting treatment or intercompany transactions may become difficult to correct later.
What Multinational Companies in Thailand Should Do
Companies that form part of multinational groups should consider conducting an early review of their Thailand operations.
The review should include the company’s accounting system, corporate income tax records, financial statements and supporting documentation.
Management should also determine which company within the group is responsible for preparing the GloBE Information Return and how information from Thailand will be supplied to that company.
Where a Thai company receives instructions or reporting templates from an overseas parent company, the local accounting team should understand how those figures reconcile with the company’s Thai statutory accounts.
Accounting Records Will Become Increasingly Important
International tax transparency ultimately depends on the quality of underlying accounting information.
For companies in Thailand, accurate bookkeeping therefore remains fundamental.
Proper accounting records support not only annual financial statements and Thai tax filings, but also group-level reporting, tax reconciliations and cross-border information exchange.
Businesses should maintain complete documentation for material transactions and ensure that accounting records can be reconciled with tax filings and audited financial statements.
Preparing Before 2027
Thailand’s planned first exchange of GIR information by December 2027 provides multinational groups with an opportunity to prepare in advance.
Companies may consider reviewing the following areas:
Accounting Records
Check whether transactions are properly recorded, classified and supported by appropriate documentation.
Tax Compliance
Review whether corporate income tax, withholding tax and VAT records reconcile with the accounting system.
Group Reporting
Ensure that figures reported from Thailand are consistent with information submitted to overseas headquarters.
Intercompany Transactions
Review whether transactions with related companies are properly documented.
Internal Responsibility
Identify which person or department will coordinate GloBE-related information in Thailand.
Early preparation can reduce the risk of inconsistencies when information begins to be exchanged internationally.
Professional Accounting and Tax Support in Thailand
International businesses often need local accounting records to meet both Thai statutory requirements and group-level reporting requirements.
Bookkeeping Co., Ltd. provides accounting, tax compliance, payroll and tax advisory support for companies operating in Thailand.
For multinational companies, proper coordination between local accounting records and international reporting requirements can become increasingly important as Thailand moves toward GloBE information exchange.
Frequently Asked Questions
What is the GloBE MCAA?
The GloBE MCAA is a multilateral agreement that facilitates the exchange of GloBE Information Return information between participating tax authorities.
Has Thailand signed the GloBE MCAA?
Yes. Thailand’s Revenue Department announced that Thailand had signed the agreement and that the OECD officially listed Thailand as a signatory on 8 September 2026.
When will Thailand begin exchanging GloBE Information Returns?
Thailand’s Revenue Department stated that Thailand plans its first exchange with relevant partner jurisdictions by December 2027.
Should multinational companies prepare now?
Yes. Multinational groups should consider reviewing accounting, tax and group-reporting processes well before information exchange begins.
Need Accounting and Tax Support in Thailand?
If your company operates in Thailand as part of a multinational group, proper accounting, tax compliance and group reporting coordination are increasingly important.
Bookkeeping Co., Ltd. can assist with:
- Monthly bookkeeping
- Corporate income tax compliance
- VAT and withholding tax
- Payroll
- Financial reporting support
- Tax advisory
- Coordination with multinational group reporting requirements
Contact us to discuss your accounting and tax compliance requirements in Thailand.
