Foreign investors can own 100% of a Thai company through five legal routes, including BOI promotion, the Foreign Business License, and the US Treaty of Amity.

A step-by-step guide to applying for BOI promotion in Thailand, covering eligibility, documents, evaluation timelines, and the deadlines that start after approval.

Every company registered in Thailand must complete a full annual compliance sequence before filing its corporate income tax return. The PND 50 is the final step, not the starting point. Before filing, companies must close their accounts, complete an independent audit, and hold an AGM to approve the financial statements. Dormant or inactive companies are not exempt. Missed deadlines carry penalties for both the company and its directors personally.

For foreign-owned companies operating service businesses in Thailand, the Foreign Business License has long been one of the most significant regulatory barriers to full ownership and operational independence. On 12 May 2026, the Thai Cabinet approved in principle a draft Ministerial Regulation that would exempt eight additional service categories from the FBL requirement under List 3 of the Foreign Business Act.

BOI Announcement No. 8/2569 replaces semi-annual project progress reporting with a quarterly cadence through the e-Monitoring system, effective from the quarter ending 30 March 2026. The change codifies a new enforcement posture: two consecutive missed filings without valid justification may result in revocation of BOI promotion rights. For promoted companies, maintaining that status shifts from a twice-yearly administrative task to an integrated part of the quarterly close.

Thailand's new cabinet delivered its policy statement to Parliament in April 2026, but the regulatory developments that matter for foreign SMEs are running on separate tracks. The proposed delisting of 10 FBA-restricted business categories, the OECD accession process now in its technical review phase, and the DBD's expanding nominee verification requirements each carry distinct implications for entity structuring, market access, and compliance. This article examines where eac

Thailand's tax obligations vary by entity type and overlap across monthly and annual deadlines tied to the company's fiscal year. Cross-border withholding tax errors, missed VAT reverse charge filings, and undocumented transfer pricing arrangements are among the most common gaps foreign companies discover only during an audit. BizWings Thailand's free Tax and Compliance Check maps your obligations, scores compliance health, and flags risks in about three minutes.

On 26 March 2026, the DBD gazetted an order requiring Thai shareholders and directors to appear in person before a registrar when certain company amendments involve foreign participation. The order takes effect 1 April 2026 and targets two scenarios: partnership capital changes that alter foreign shareholding below 50%, and signatory changes that introduce a foreign national. Power of attorney is no longer sufficient. The measure closes the post-incorporation amendment loopho

Thailand's Foreign Business Act caps foreign ownership at 49% in most sectors, but several legal pathways exist to achieve full ownership. Choosing the wrong structure can mean forfeited tax exemptions, unnecessary remittance taxes, or costly regulatory restructuring. BizWings Thailand's free Entity and Market Entry Tool walks you through 10 questions and delivers a personalised entity recommendation with BOI eligibility assessment in about three minutes.

Royal Decree No. 805, effective 3 March 2026, introduces a personal income tax deduction of up to THB 200,000 for residential solar rooftop installations and a 150% corporate tax deduction for investment in energy-saving machinery certified with the Level 5-star label from DEDE and EGAT. Both measures run through 31 December 2028. Eligibility conditions around e-Tax Invoice documentation, VAT-registered suppliers require advanced planning.