
Get Your Entity Recommendation for Expansion to Thailand
Thailand limits foreign shareholders to 49% in most sectors, but several pathways allow full foreign ownership. This free tool walks you through 10 questions about your industry, ownership needs, and investment profile, then recommends the best entity type for your situation, whether that's a Thai Ltd, BOI-promoted company, TISO, Treaty of Amity company, Branch Office, or Representative Office.
How to Choose the Right Entity for Your Thailand Market Entry
Foreign companies entering Thailand must choose from five main entity structures, each with distinct implications for ownership, taxation, staffing, and operations. The right choice depends on your industry, investment size, ownership requirements, and whether you qualify for Board of Investment (BOI) promotion. Choosing incorrectly can result in unnecessary foreign ownership restrictions, higher tax burdens, or regulatory complications that are costly and time-consuming to unwind.
01
Thai Limited Company (Thai Ltd)
The most common structure for foreign SMEs operating in Thailand. Under the Foreign Business Act (FBA), foreign ownership is normally capped at 49% unless you obtain a Foreign Business License (FBL) or BOI promotion. Minimum registered capital is typically THB 2 million per work permit. The company is subject to 20% corporate income tax with a mandatory statutory audit. Share structuring with preferred and ordinary shares can give the foreign minority shareholder effective management control while remaining compliant with the FBA.
02
BOI-Promoted Company
The Board of Investment offers tax holidays of 3 to 13 years with CIT exemption for companies in promoted sectors including technology, manufacturing, agriculture, digital services, and medical devices. BOI promotion also allows 100% foreign ownership regardless of the Foreign Business Act, reduced Thai-to-foreign staff ratios, and land ownership rights. Our tool assesses your BOI eligibility based on your sector, investment size, R&D commitments, and planned location (companies in EEC zones receive additional incentives).
03
Trade & Investment Support Office
The Trade and Investment Support Office (TISO) is a BOI promotion category (10.1.1) designed for service-oriented foreign companies. It does not offer CIT exemptions, but provides 100% foreign ownership, streamlined work permits through the BOI One-Stop Service Center, and limited land ownership rights. Qualifying companies must have annual selling and administrative expenses of at least THB 10 million. Eligible activities include advisory services, BPO, engineering, monitoring associated enterprises, and wholesaling Thai-manufactured products.
04
Treaty of Amity (US Companies)
The Treaty of Amity between Thailand and the United States, signed in 1966, allows US citizens and US-majority-owned companies to hold 100% ownership without needing BOI promotion or a Foreign Business License. At least 51% of shares must be held by US nationals and at least 50% of directors must be American or Thai. Most business sectors are open, though communications, transport, fiduciary functions, land ownership, and natural resource exploitation remain restricted. Certification takes 6 to 12 weeks.
05
Branch Office
A Branch Office is a direct extension of the foreign parent company, not a separate legal entity. It requires a Foreign Business License for restricted activities and is subject to 20% CIT on Thai-source income plus a 10% remittance tax on profits sent to the head office.
The Thai-to-foreign employee ratio is a favorable 1:1 compared to 4:1 for a Thai Ltd. This structure works best for project-based operations or companies needing direct legal continuity with the parent entity.
06
Representative Office
A Rep Office is limited strictly to non-revenue activities such as market research, quality control, vendor sourcing, and reporting to the head office. It cannot generate income, sign contracts, or accept purchase orders.
Filing obligations are minimal with zero-income CIT returns and DBD financial filings, but scope limitations are strict.If a Rep Office is found engaging in revenue-generating work, it faces reclassification as a permanent establishment with retroactive CIT liability.
Frequently asked questions
How to Choose the Right Entity for Your Thailand Market Entry
Foreign companies entering Thailand must choose from five main entity structures, each with distinct implications for ownership, taxation, staffing, and operations. The right choice depends on your industry, investment size, ownership requirements, and whether you qualify for Board of Investment (BOI) promotion. Choosing incorrectly can result in unnecessary foreign ownership restrictions, higher tax burdens, or regulatory complications that are costly and time-consuming to unwind.