For many years, transfer pricing (TP) compliance in Thailand was often viewed as a documentation exercise performed after year-end. That mindset is rapidly becoming obsolete. Thailand's Revenue Department (RD) has transformed TP enforcement from a reactive audit process into a data-driven risk management system that continuously analyzes corporate tax filings, financial statements, related-party disclosures, withholding tax records, and transfer pricing reporting.
Accounting & Legal in Thailand
For decades, tax compliance in Thailand revolved around physical tax invoices, manual reconciliations, and document retention practices. Finance departments maintained extensive archives of paper records, while tax audits often focused on reviewing historical documentation long after transactions had occurred. That model is rapidly disappearing.
For decades, Thailand's investment promotion framework relied heavily on corporate income tax (CIT) exemptions granted through the Board of Investment (BOI). These incentives successfully attracted foreign direct investment by reducing or eliminating tax burdens for qualifying projects. However, the implementation of the OECD's Pillar Two Global Minimum Tax framework has fundamentally altered this landscape.
The taxation of foreign-sourced income in Thailand has entered a fundamentally different era. Since the Revenue Department's landmark reinterpretation of Section 41 of the Revenue Code, foreign income earned by Thai tax residents and subsequently brought into Thailand has become subject to Thai personal income tax. Simultaneously, Thailand's implementation of the Common Reporting Standard (CRS) has significantly strengthened the government's ability to obtain information regarding offshore financial accounts held by Thai tax residents.
Financial due diligence in Thailand has undergone a profound transformation in 2026. Historically, acquisition teams focused primarily on reviewing audited financial statements, testing account balances, and confirming compliance with basic accounting standards. Today, however, investors, lenders, and legal advisors are increasingly concerned with the quality and sustainability of reported earnings rather than merely their accuracy.
For decades, due diligence (DD) was primarily a labor-intensive process involving teams of lawyers, accountants, and consultants manually reviewing contracts, financial records, corporate filings, and operational documents. In complex transactions, particularly cross-border mergers and acquisitions, this process often consumed months of professional time while still leaving room for material risks to remain undiscovered.
