Starting a Business in Thailand as a Foreigner: The 2026 Overview

Your Options

Four main paths: (1) Thai Limited Company (most common — 51% Thai, 49% foreign ownership), (2) BOI-promoted company (100% foreign ownership possible with tax incentives), (3) Branch office (extension of your foreign company), (4) Representative office (market research only, no revenue).

Thai Limited Company (Borisat Chamkat)

The Thai Limited Company under the Civil and Commercial Code B.E. 2468 (1925) (Sections 1096-1246) is the most common vehicle for foreign entrepreneurs. Registration requires a minimum of two shareholders (reduced from three to two by the Civil and Commercial Code Amendment Act No. 23 B.E. 2566 (2023), effective 7 February 2023; the previous figure of three had itself been reduced from seven in earlier reforms). The company must have at least one director, and all directors are jointly liable for the company's management unless the articles of association specify otherwise (Section 1168). Under the 49/51 rule, foreign nationals generally cannot hold more than 49% of the shares in business activities restricted under the Foreign Business Act B.E. 2542 (1999).

The registration process involves reserving a company name with the Department of Business Development (DBD), filing a Memorandum of Association, holding a statutory meeting, and registering the company. All documents must be prepared in Thai, and the registration application is submitted at the DBD office in Bangkok or at provincial commercial registration offices.

BOI-Promoted Company

The Board of Investment (BOI) offers investment promotion under the Investment Promotion Act B.E. 2520 (1977) (as amended). BOI-promoted companies may receive permission for 100% foreign ownership, corporate income tax holidays of up to 13 years (depending on the activity and location), import duty exemptions on machinery and raw materials, and facilitated work permit and visa processing. Eligible activities are listed in the BOI's published Activity List, which is updated periodically and covers sectors including manufacturing, technology, agriculture, and selected services. For a detailed walkthrough, see the BOI Investment Promotion Application guide.

Branch Office

A foreign company may establish a branch office in Thailand under the Civil and Commercial Code. The branch is not a separate legal entity — it is an extension of the parent company, meaning the parent bears full liability for the branch's obligations. Branch offices must obtain a Foreign Business License (FBL) if operating in activities restricted under the Foreign Business Act. The registered capital requirement for an FBL is a minimum of THB 3 million per restricted activity.

Representative Office

A representative office is limited to non-revenue-generating activities: market research, sourcing goods, quality control, and reporting to the head office. Representative offices cannot enter into contracts, accept orders, or generate income in Thailand. This structure is suitable for companies exploring the Thai market before committing to a full operational presence.

The Foreign Business Act

The FBA restricts foreign majority ownership in most business sectors. The famous "49/51 rule" means most Thai companies must be majority Thai-owned. Legal workarounds include BOI promotion, Treaty of Amity (US citizens only), and operating in unrestricted sectors.

The FBA defines a "foreigner" as any juristic person in which foreigners hold 50% or more of the capital (Section 4). Business activities are divided into three lists: List 1 (absolutely prohibited — media, rice farming, forestry), List 2 (restricted for national security — firearms, domestic transportation, mining), and List 3 (restricted for competitive reasons — retail, construction, hotels, services). Recent 2025 amendments to List 3 have liberalized certain service sectors including e-commerce, consulting, and software development.

Penalties for operating a restricted business without proper authorization include imprisonment of up to 3 years and fines of THB 100,000 to THB 1,000,000 (Section 36). Using Thai nominees to circumvent the Act carries the same penalties and may result in dissolution of the company.

Costs

Thai Ltd registration: THB 30,000-150,000 (including legal fees). BOI application: THB 50,000-200,000. Budget THB 2 million registered capital if you need foreign work permits. Ongoing costs: accounting (THB 5,000-15,000/month), annual audit, and tax compliance.

Detailed Cost Breakdown

Company registration fees (DBD): THB 5,500 for registered capital up to THB 5 million. Company seal: THB 500-2,000. Tax registration (VAT): Free, but companies with annual revenue exceeding THB 1.8 million must register for VAT. Social security registration: Free, but employers contribute 5% of employee salaries (capped at THB 750/month per employee). Work permit application: THB 3,000 per permit. Non-Immigrant B visa (for company directors): THB 2,000 per year.

Annual ongoing costs: Monthly accounting services (THB 5,000-15,000 depending on transaction volume), annual financial audit by a certified public accountant (THB 15,000-50,000 depending on company size), corporate income tax filing (semi-annual and annual), withholding tax submissions (monthly), and Social Security Fund contributions (monthly). Companies that fail to file annual financial statements face penalties of THB 10,000-50,000 under the Revenue Code B.E. 2481 (1938).

Timeline

Thai Ltd: 2-4 weeks. BOI promotion: 2-4 months. Branch office: 4-8 weeks. The fastest path is a standard Thai Ltd without BOI.

Step-by-Step Thai Ltd Registration Timeline

Day 1: Reserve company name at DBD (online, approval within 1-3 days). Days 3-5: Prepare and file Memorandum of Association with DBD. Days 5-10: Hold statutory meeting, appoint directors, adopt articles of association, and authorize capital calls. Days 10-15: File company registration application with all required documents. Days 15-20: Register for tax ID, VAT (if applicable), and Social Security. Days 20-30: Open corporate bank account and apply for work permits for foreign employees.

Common Mistakes

Using Thai nominees (illegal), underestimating ongoing compliance costs, not budgeting for work permits (THB 2M capital per permit), and operating outside registered business objectives.

Additional Traps to Avoid

Incorrect business objectives: Thai companies must specify their business objectives at registration. Operating outside these stated objectives can result in regulatory issues, work permit denial, and tax complications. List objectives broadly enough to cover all planned activities.

Director liability: Under Section 1168 of the Civil and Commercial Code, directors are personally liable for acts done beyond their authority. Under Section 1169, directors who cause damage to the company through negligence may be jointly liable. Foreign directors who do not actively participate in management should ensure the articles of association clearly define director authority and limitations.

Ignoring the 4:1 ratio: Thai immigration policy generally requires companies to employ four Thai staff members for each foreign work permit issued. Failure to maintain this ratio can result in work permit renewal denial. The ratio applies at the company level, not per department.

Failing to hold Annual General Meetings: Under Section 1171 of the Civil and Commercial Code, companies must hold an AGM within 4 months of the end of each financial year. Failure to do so can result in fines and affect the company's standing with regulators.

Tax Obligations for New Companies

Thai companies are subject to corporate income tax at a flat rate of 20% on net profits (Revenue Code Section 65). Small and medium enterprises with paid-up capital of THB 5 million or less benefit from reduced rates: 0% on the first THB 300,000 of net profits and 15% on profits between THB 300,001 and THB 3 million. Companies must file half-year (PND.51) and annual (PND.50) corporate income tax returns. Monthly obligations include withholding tax submissions (PND.1, PND.3, PND.53) and VAT returns (PP.30). For more detailed information on tax compliance, see the expat tax guide.

Frequently Asked Questions

Can a foreigner be the sole director of a Thai company?

Yes. There is no requirement for Thai directors, though the company must comply with the 49/51 shareholding ratio if it operates in FBA-restricted activities. The foreign director will need a valid work permit to perform management duties in Thailand.

What is the minimum number of shareholders required?

A Thai limited company requires a minimum of two shareholders (promoters) at registration under Section 1097 of the Civil and Commercial Code (reduced from three to two by the Civil and Commercial Code Amendment Act No. 23 B.E. 2566 (2023), effective 7 February 2023). After registration, the number may be reduced further only if permitted by law, but maintaining the statutory minimum is required for the company to remain validly constituted.

Can I transfer money from my personal account to register the company?

Yes, but the source of registered capital must be documented. For foreign shareholders, funds should be transferred from abroad in foreign currency and converted to Thai Baht through a Thai bank, which will issue a Foreign Exchange Transaction Form. This documentation is important for future profit repatriation and as evidence of legitimate investment.

How long does it take to get a work permit?

The standard processing time for a work permit application at the Department of Employment is 7-10 business days. However, the applicant must first hold a valid Non-Immigrant B visa, which may require a separate application at a Thai consulate abroad or a visa change within Thailand. BOI-promoted companies benefit from expedited processing through the BOI One Stop Service Center, typically within 3 business days. See the work permit guide for full details.

What happens if my company does not generate revenue in its first year?

Even if the company earns no revenue, it must still file all required tax returns (corporate income tax, withholding tax, VAT if registered), submit annual financial statements audited by a certified public accountant, and hold an Annual General Meeting. Failure to comply with these obligations can result in fines and penalties, and may affect work permit renewals for foreign employees.