How to Register a Company in Thailand as a Foreigner (2026 Step-by-Step Guide)

Thailand is one of Southeast Asia’s most attractive destinations for foreign entrepreneurs — offering a low cost of doing business, a strategic location, a growing digital economy, and strong demand across tourism, manufacturing, and services. But the legal framework for foreign business ownership is complex, and navigating it without proper guidance can lead to costly delays or, worse, illegal structures that expose you to criminal liability. This guide explains exactly how to register a company in Thailand as a foreigner in 2026, covering the key company structures available, how foreign ownership restrictions work under the Foreign Business Act, how BOI promotion can unlock 100% ownership, and the common mistakes that trip up even experienced investors. If you are also exploring buying a business in Thailand as a foreigner, many of the same legal principles apply and should be considered before committing to any structure.

Can Foreigners Own 100% of a Company in Thailand?

By default, foreigners are limited to owning 49% of a Thai Limited Company under the Foreign Business Act B.E. 2542 (1999). This means Thai nationals must hold at least 51% of shares in most business types. However, three important exceptions allow foreign investors to own 100%:

• BOI Promotion: Companies approved by the Board of Investment can receive 100% foreign ownership regardless of sector restrictions, along with significant tax incentives.
• Treaty of Amity (US citizens only): Under the 1966 US-Thailand Treaty of Amity and Economic Relations, American citizens and US-incorporated entities may own up to 100% in most business sectors.
• Foreign Business Licence (FBL): Issued by the Department of Business Development (DBD), an FBL grants 100% foreign ownership for activities listed under the Foreign Business Act, subject to approval.

Understanding which exception applies to your situation — or whether the 49% rule applies at all — is the essential first step before committing to any business structure.

Company Structures Available to Foreigners

Thailand offers several legal structures for foreign investors. The right choice depends on your nationality, sector, ownership goals, and long-term business plans.

Structure	Foreign Ownership	Best For	Min Capital
Thai Limited Company (Co., Ltd.)	Up to 49%	Most businesses	THB 2M (foreign staff)
BOI-Promoted Company	Up to 100%	Manufacturing, tech, services	Varies by sector
Treaty of Amity Company (US only)	Up to 100%	US citizen-owned businesses	THB 2M
Branch Office	100% (foreign HQ)	Representing foreign parent	THB 3M
Representative Office	100%	Market research, sourcing only	THB 3M

For most independent foreign entrepreneurs, a Thai Limited Company with BOI promotion or a Treaty of Amity structure is the most practical route. Branch offices are well suited to multinationals extending an existing operation into Thailand, while representative offices are strictly non-revenue-generating and cannot sign contracts or conduct sales. Your sector and the scale of your planned investment will largely determine which structure provides the best legal protection and commercial flexibility.

The Foreign Business Act — What’s Restricted?

The Foreign Business Act (FBA) divides restricted business activities into three lists. Understanding where your intended business falls is critical before choosing a structure.

List 1 — Absolutely Prohibited: These activities are closed to foreign ownership entirely, with no exception or licence available. Examples include farming and agriculture, inland trading of Thai agricultural products, and terrestrial media (newspapers, radio, television). Foreign investors cannot participate in these sectors under any structure.

List 2 — Restricted, Require Cabinet Approval: Foreign participation is permitted only with Cabinet-level ministerial approval and is limited by national security or cultural sensitivity concerns. Examples include domestic land transportation, Thai antique trading, and domestic air transport. Approval is rarely granted and the process is lengthy.

List 3 — Restricted, Require a Foreign Business Licence (FBL): This is the most commercially relevant list for foreign entrepreneurs. Activities such as retail and wholesale trading, construction, legal services, and accounting services fall here. A Foreign Business Licence is obtainable from the Department of Business Development (DBD), but applications require demonstrated value-add to Thailand and are subject to a three-to-six month review process.

If your intended business falls entirely outside all three lists — for example, export-oriented manufacturing or software development for foreign clients — you may be able to operate with 100% foreign ownership through BOI promotion without needing an FBL at all.

BOI Promotion — Get 100% Ownership + Tax Benefits

The Board of Investment (BOI) is Thailand’s primary tool for attracting high-value foreign direct investment. BOI-promoted companies receive a package of benefits that can dramatically reduce the cost and complexity of operating in Thailand as a foreign business.

Who qualifies for BOI promotion? The BOI prioritises sectors it considers strategically important to Thailand’s economic development. Eligible categories include advanced manufacturing, digital technology and software, agriculture and food processing, medical devices and healthcare services, tourism infrastructure, and logistics. The BOI updates its eligible activities list regularly, so it is important to confirm your sector qualifies before building your application around BOI status.

Key benefits of BOI promotion include:

• 100% foreign ownership — even for businesses that would otherwise fall under FBA restrictions
• Corporate income tax (CIT) exemption for up to 13 years (sector-dependent)
• Exemption from import duties on machinery and raw materials used in production
• The right to own land in Thailand (normally restricted for foreign companies)
• Streamlined work permit and visa processing for foreign employees and executives

How to apply: BOI applications are filed through the BOI’s e-Investment platform. The application must include a detailed business plan, financial projections, and a clear explanation of how the project benefits Thailand. The typical timeline from application submission to letter of approval is three to six months, though well-prepared applications in priority sectors can move faster. Legal representation significantly improves both the quality of the application and the speed of approval.

Step-by-Step: How to Register a Thai Company as a Foreigner

1. Choose your company structure and confirm FBA compliance

   Before any filing, determine whether your intended business falls under FBA List 1, 2, or 3 — and whether you qualify for BOI, Treaty of Amity, or FBL exemptions. The wrong structure can result in your company being deemed in violation of Thai law, which carries criminal penalties for both foreign and Thai directors.

2. Reserve your company name with the Department of Business Development (DBD)

   Submit up to three proposed company names to the DBD for availability checking. Names must not duplicate or closely resemble existing registered companies and must comply with DBD naming guidelines. Name reservation is valid for 30 days.

3. Draft the Memorandum of Association (MOA)

   The MOA sets out the company name, registered address, objectives (business activities), registered capital, and details of the promoters (founders). This document must be drafted carefully — the stated objectives define what the company is legally permitted to do and must align with FBA compliance.

4. Hold the Statutory Meeting

   The statutory meeting is the founding shareholders’ meeting at which the articles of association are adopted, the board of directors is appointed, and any calls on share capital are authorised. The meeting must be attended by all promoters or their authorised representatives.

5. Register with the DBD (submit within 3 months of statutory meeting)

   The complete registration package — including the MOA, articles of association, statutory meeting minutes, list of shareholders, and details of directors — must be submitted to the DBD within three months of the statutory meeting. Failure to meet this deadline requires the process to restart from the name reservation stage.

6. Obtain your company registration certificate

   Once the DBD approves the application, the company receives its certificate of incorporation and a company affidavit. These documents are required for opening bank accounts, applying for licences, and hiring foreign staff.

7. Register for VAT (if revenue will exceed THB 1.8M/year)

   Companies whose annual revenue is expected to exceed THB 1.8 million must register for Value Added Tax (VAT) with the Thai Revenue Department within 30 days of reaching that threshold. Early registration is advisable if you expect to reach the threshold quickly, as late registration attracts penalties.

8. Open a Thai corporate bank account

   A corporate bank account is required to receive the registered capital and operate commercially. Thai banks require the company registration certificate, shareholder list, director identification, and sometimes proof of a registered office. Requirements vary between banks; some are more foreigner-friendly than others.

9. Apply for work permit(s) for foreign staff (1 permit per 4 Thai employees)

   Foreign nationals working in Thailand — including directors — require a work permit. The standard ratio is one work permit for every four Thai employees on the company’s payroll. Work permit applications must be supported by the correct visa (Non-B or BOI visa), and permits are role-specific.

10. Apply for relevant business licences (if required by your sector)

    Certain sectors require additional licences beyond DBD registration — including food businesses (FDA), hotels, restaurants, clinics, financial services, and construction. Identify sector-specific licence requirements early, as some have lengthy approval timelines that can delay operations.

Timeline and Costs

Stage	Timeline	Approximate Cost (THB)
Standard Co., Ltd. registration	2–4 weeks	30,000–80,000
BOI application + approval	3–6 months	50,000–150,000
Foreign Business Licence (FBL)	3–6 months	30,000–100,000
Work permit (per person)	1–2 weeks	3,000–5,000
VAT registration	1 week	0 (government fee)

Note: Costs shown include professional and legal fees. Government filing fees alone are considerably lower. Total costs vary significantly depending on the complexity of the structure, the sector, and the level of legal support required.

Common Mistakes Foreigners Make

• Using nominee shareholders to circumvent the Foreign Business Act. Placing Thai nationals as majority shareholders who hold shares on behalf of a foreigner is illegal under Thai law and constitutes a criminal offence for both the foreign investor and the Thai nominees. The DBD and Revenue Department have become increasingly effective at identifying nominee structures, and the consequences include company dissolution and prosecution.
• Choosing the wrong company structure from the outset. A branch office, for example, carries unlimited liability for the parent company — inappropriate for most independent investors who would be better served by a limited liability Co., Ltd. structure. Restructuring after registration is time-consuming and expensive; get the structure right first.
• Underestimating registered capital requirements. Many foreign investors underestimate how registered capital affects their eligibility for work permits, the number of foreign employees they can hire, and their credibility with Thai banks and government agencies. For most foreign-staffed companies, THB 2 million is the minimum — but some sectors require considerably more.
• Failing to register for VAT at the right time. Companies that exceed the THB 1.8 million annual revenue threshold without registering for VAT face backdated VAT liability plus penalties. This is a common and avoidable problem for businesses that grow faster than expected in their first year.
• Failing to maintain the 4:1 Thai-to-foreign employee ratio. The work permit system ties the number of foreign employees directly to the number of Thai employees on the payroll. Letting Thai employee numbers fall — through redundancies or not rehiring — can put existing work permits at risk and prevent new ones from being issued.

Frequently Asked Questions

Can a foreigner own 100% of a company in Thailand?

Yes — but only under specific circumstances. A foreigner can own 100% of a Thai company if the business obtains BOI promotion, if the investor qualifies under the US-Thailand Treaty of Amity (US citizens and US-incorporated companies only), or if a Foreign Business Licence is granted by the DBD. Without one of these routes, the Foreign Business Act limits foreign ownership to 49%.

How long does company registration take in Thailand?

A standard Thai Limited Company can typically be registered in two to four weeks once all documents are in order. BOI-promoted companies and those requiring a Foreign Business Licence take significantly longer — usually three to six months — due to the additional government review processes involved.

What is the minimum capital for a foreign-owned company in Thailand?

The minimum registered capital for a company that employs foreign staff is THB 2 million per work permit. Branch offices and representative offices have a minimum capital requirement of THB 3 million. BOI-promoted companies have sector-specific minimum investment thresholds that may be higher, depending on the nature of the project.

Do I need a Thai partner to register a company in Thailand?

Not necessarily. If you obtain BOI promotion, qualify under the Treaty of Amity, or are granted a Foreign Business Licence, Thai shareholders are not required. However, for a standard Thai Limited Company operating in a sector that falls under the FBA without an exemption, Thai shareholders must hold at least 51% of the shares — making a Thai partner or co-shareholders legally required (though this must not involve nominees).

Can I register a company in Thailand as a tourist?

No. You cannot legally work in Thailand — including as a director actively managing a company — on a tourist visa or visa exemption entry. To obtain a work permit, you must hold an appropriate long-stay visa such as a Non-Immigrant B visa. BOI-promoted companies can sponsor a BOI-specific visa category with streamlined work permit access for their foreign executives.

What is the Foreign Business Act List 3?

FBA List 3 covers business activities that foreigners may undertake only after obtaining a Foreign Business Licence from the Department of Business Development. It is the most commercially relevant list for foreign investors and includes activities such as retail and wholesale trading, construction, legal services, accounting, and advertising. An FBL application requires a detailed business case and is subject to a review period of three to six months.

How Harwell Legal International Can Help

Harwell Legal International is a full-service international law firm based in Phuket, Thailand, with extensive experience advising foreign investors and entrepreneurs on all aspects of Thai corporate law. Our team guides clients through the full spectrum of business establishment — from the initial structure assessment and FBA compliance review through to DBD registration, regulatory filings, and post-incorporation compliance. We have a strong track record helping foreign-owned businesses achieve the right legal foundation from day one.

Our corporate services for foreign investors include: BOI promotion applications and strategic project structuring; Foreign Business Act compliance assessments and FBL applications; Thai Limited Company and branch office registration with the DBD; work permit and Non-B visa applications for foreign directors and employees; shareholder agreements and joint venture documentation; and ongoing corporate secretarial and compliance support. Whether you are registering a single-director consultancy or establishing a multi-entity manufacturing group, we have the expertise to manage the process end to end.

Harwell Legal International has been serving international clients in Thailand for over 20 years. Our Phuket office works with an international team fluent in English, Thai, and Russian — enabling us to serve clients from across Europe, North America, Russia, and the CIS with clear communication throughout every stage of their matter. We understand that foreign investors need practical, commercially minded legal advice — not just an explanation of the rules — and our approach reflects that.