Company Registration in Thailand:
Complete Legal Guide

1. Introduction — Why Thailand? Background & Strategic Context

Thailand remains one of Southeast Asia's most attractive destinations for foreign direct investment. Its strategic location at the heart of the ASEAN Economic Community, a well-developed logistics infrastructure, a skilled manufacturing workforce, and a legal framework aligned with international commercial standards collectively make the country a compelling choice for entrepreneurs, multinational corporations, and regional holding companies alike.

Setting up a legal entity in Thailand is the foundation of any sustained business operation. Whether you are an international investor establishing a regional headquarters, an expatriate entrepreneur launching a start-up, or a foreign company seeking to manufacture for export, understanding the legal framework governing company formation is essential. Choosing the wrong entity type or failing to comply with Thai ownership rules can result in civil penalties, criminal prosecution, and forced dissolution of the business.

This guide provides a comprehensive, practitioner-level overview of the company registration process in Thailand as of 2026, covering all major entity types, the step-by-step registration procedure at the Department of Business Development (DBD), foreign ownership restrictions under the Foreign Business Act B.E. 2542 (1999), and practical cost and timeline estimates. All legal citations refer to applicable Thai statutes; where a specific section number requires independent verification, this is noted with [must verify section number].

2. Types of Business Entities Partnership vs. Limited Company vs. PLC

Thai law recognizes several forms of business organization, each governed by specific provisions of the Civil and Commercial Code B.E. 2468 (1925) and related legislation. Choosing the appropriate entity type is a critical first decision that affects liability, governance, tax treatment, and the ability to attract foreign investment.

2.1 Ordinary Partnership (ห้างหุ้นส่วนสามัญ)

An Ordinary Partnership is governed by the Civil and Commercial Code [must verify section numbers]. It requires a minimum of two partners and may be either unregistered or registered with the DBD. All partners are jointly and severally liable for the partnership's obligations without limit. Because of this unlimited liability exposure, the Ordinary Partnership is rarely used for commercial ventures of any scale, and it is not available to foreign nationals without additional licensing.

2.2 Limited Partnership (ห้างหุ้นส่วนจำกัด)

A Limited Partnership consists of at least one general partner who bears unlimited liability and at least one limited partner whose liability is capped at the amount of their agreed contribution. Registration is mandatory at the DBD under the Civil and Commercial Code [must verify section numbers]. The limited partnership structure is more commonly used by small and medium-sized Thai businesses. For foreign investors, the foreign ownership rules under the Foreign Business Act B.E. 2542 (1999) apply equally to limited partnerships, limiting foreign partnership interests in restricted sectors.

2.3 Private Limited Company (บริษัทจำกัด) — Most Common

The Private Limited Company is the most widely used business structure for both domestic and foreign investors operating in Thailand. It is governed by the Civil and Commercial Code, Sections 1096–1336 [must verify section numbers]. Key characteristics include:

1. Separate legal personality: The company is a distinct legal entity from its shareholders, meaning shareholders' personal assets are generally protected from company liabilities.
2. Minimum shareholders: At least three promoters are required at the memorandum of association stage, and the company must maintain at least three shareholders at all times after registration.
3. Transferable shares: Shares are freely transferable unless restricted by the Articles of Association.
4. Directors: The Board of Directors (at least one director) manages the company. A director need not be a shareholder.
5. Annual requirements: Statutory audited financial statements must be filed annually with the DBD and the Revenue Department.

2.4 Public Limited Company (บริษัทมหาชนจำกัด)

The Public Limited Company (PLC) is governed by the Public Limited Companies Act B.E. 2535 (1992). It is designed for companies intending to make a public offering of securities or list on the Stock Exchange of Thailand (SET). A PLC requires a minimum of 15 promoters at incorporation and must maintain at least 15 shareholders. Governance requirements are more stringent, including mandatory independent directors, an audit committee, and more detailed financial disclosure obligations. A PLC is generally not the appropriate vehicle for newly established foreign-invested businesses.

2.5 Branch Office and Representative Office

A foreign company may operate in Thailand through a Branch Office (สาขา) or a Representative Office (สำนักงานผู้แทน). A Branch Office may conduct revenue-generating activities but remains subject to the Foreign Business Act B.E. 2542 (1999) restrictions and must obtain a Foreign Business License. A Representative Office is limited to non-revenue activities such as sourcing, market research, and liaison, and it cannot conclude contracts or generate income. Both structures require registration with the DBD and, in certain sectors, approval from the relevant line ministry.

3. 7-Step Registration Process (DBD) Department of Business Development — Step by Step

The registration of a Private Limited Company in Thailand is administered by the Department of Business Development (DBD), Ministry of Commerce. The process can be completed online through the DBD e-Registration portal (https://ereg.dbd.go.th) or in person at any DBD provincial office. The following seven steps outline the complete process from initial planning to obtaining the company's registration certificate.

4. Required Documents Checklist Documentation Requirements for DBD Registration

Having all required documents prepared in advance is the most effective way to avoid delays in the DBD registration process. The following checklist covers the standard documentation requirements for registering a Private Limited Company in Thailand. Additional documents may be required for foreign shareholders or directors.

4.1 Core Registration Documents

1. Memorandum of Association (MOA) — signed by all promoters, certified by the DBD.
2. Articles of Association — governing the internal rules of the company.
3. Minutes of the Statutory Meeting — recording adoption of MOA, appointment of directors and auditors.
4. DBD Registration Form (Bor.Mor.Jor. 1) — completed and signed by an authorized director.
5. List of Directors — full names, nationality, passport/ID numbers, addresses, and signing authority scope.
6. Shareholder Register — names, nationalities, and share quantities of all initial shareholders.
7. Registered Office Documentation — title deed, lease agreement, or permission letter from the property owner for use of the address as the registered office.
8. Bank Confirmation of Paid-Up Capital — confirming at least 25% of registered capital has been deposited.

4.2 Identity Documents for Directors and Shareholders

1. Thai nationals: Thai national ID card (บัตรประชาชน) — both sides — certified copy.
2. Foreign nationals: Passport — certified copy of the biographical page and the page showing the most recent entry stamp. If a work permit is held, a copy must also be provided.
3. Juristic person shareholders: If a company (Thai or foreign) holds shares, a certified copy of its registration certificate, list of authorized directors, and a board resolution authorizing the investment must be provided.

4.3 Certified Translations

All documents that are not in Thai language must be accompanied by a certified Thai translation. Foreign corporate documents (resolutions, certificates of incorporation) that originate from overseas must typically be notarized by a Notary Public in the country of origin and then legalized (apostilled or consularized) before submission to Thai authorities.

5. Registered Capital Requirements Minimum Capital, Paid-Up Rules & FBL Threshold

The question of how much registered capital is required to establish a company in Thailand depends significantly on whether the company will be majority Thai-owned, majority foreign-owned, or structured to operate in a restricted business category under the Foreign Business Act B.E. 2542 (1999).

5.1 Thai-Majority Private Limited Company

For a Private Limited Company with Thai majority ownership operating in an unrestricted sector, the Civil and Commercial Code does not prescribe a statutory minimum registered capital. The company may be incorporated with as little as 2 THB per share and with any number of shares, provided the total paid-up capital meets the 25% rule. In practice, however, banks, business partners, and government agencies often view companies with very low registered capital as lacking financial credibility. A registered capital of THB 1–2 million is common for small businesses; larger operations typically require THB 5 million or more.

5.2 Foreign Business License (FBL) Threshold

Where a foreign-majority company (over 49% foreign-owned) wishes to engage in a business activity listed in the Annexes to the Foreign Business Act B.E. 2542 (1999), it must obtain a Foreign Business License (FBL) from the Foreign Business Committee, Ministry of Commerce. A key requirement for FBL eligability is the minimum registered capital, which is set at:

5.3 BOI-Promoted Companies

Companies receiving promotion certificates from the Board of Investment (BOI) under the Investment Promotion Act B.E. 2520 (1977) may be exempt from the Foreign Business Act restrictions, allowing 100% foreign ownership regardless of sector. BOI-promoted companies generally must meet minimum investment thresholds (typically THB 1 million or more, excluding land and working capital) and satisfy other criteria related to the promoted activity.

5.4 The 25% Paid-Up Rule

Regardless of the total registered capital, at least 25% of the registered capital must be actually paid by shareholders at the time of company registration. The remaining 75% may be called up later by resolution of the Board of Directors. This rule is established by the Civil and Commercial Code [must verify section number] and is strictly enforced by the DBD, which requires a bank certificate confirming the paid-up amount before issuing the Company Certificate.

6. Foreign Ownership Restrictions (FBA) Foreign Business Act B.E. 2542 (1999) — Three Annexes

The Foreign Business Act B.E. 2542 (1999) (พระราชบัญญัติการประกอบธุรกิจของคนต่างด้าว พ.ศ. 2542) is the primary legislation governing foreign participation in Thai business. The Act defines a "foreigner" (คนต่างด้าว) as including both foreign natural persons and juristic persons in which foreigners hold 50% or more of the shares or are majority partners. Under this definition, a company with 50% or more foreign shareholding is treated as a "foreign entity" for the purposes of the Act.

6.1 The Three Annexes — Business Classification

The Foreign Business Act B.E. 2542 (1999) divides restricted businesses into three annexes:

6.2 Businesses NOT Restricted by the FBA

Importantly, many of the most commercially significant activities in Thailand are not covered by the Foreign Business Act annexes. Manufacturing (for the domestic market or export), international trade, and many service activities not listed in the annexes may be conducted by 100% foreign-owned entities without a Foreign Business License. Additionally, the following pathways provide exemptions from or alternatives to FBA restrictions:

1. BOI Promotion: BOI-promoted companies are granted an exemption from the Foreign Business Act restrictions for their approved promoted activities, enabling 100% foreign ownership. The Investment Promotion Act B.E. 2520 (1977) governs this.
2. Industrial Estate Authority of Thailand (IEAT): Companies established within IEAT-designated zones may benefit from similar FBA exemptions.
3. Treaty of Amity (US–Thai Treaty): Under the Treaty of Amity and Economic Relations between Thailand and the United States, American nationals and US-majority companies may operate in most sectors on the same basis as Thai nationals. This is a significant and unique advantage for US investors.
4. EEC — Eastern Economic Corridor: The EEC Act B.E. 2561 (2018) provides additional facilitation measures for target industries investing in the Eastern Special Development Zone.

7. Costs & Timeline Registration Fees, Professional Fees & Realistic Timeline

The total cost of setting up a company in Thailand varies depending on the registered capital, the complexity of the corporate structure, and whether professional legal and accounting assistance is engaged. The following breakdown provides practical guidance for budgeting purposes.

7.1 Official Government Registration Fees (DBD)

DBD registration fees are calculated based on the registered capital of the company. The applicable fee schedule under the Civil and Commercial Code Ministerial Regulation [must verify section number] is approximately:

7.2 Professional and Ancillary Costs

1. Thai law firm / company formation agent: THB 15,000–50,000 (depending on complexity and bilingual document requirements).
2. Certified translation of foreign documents: THB 3,000–8,000 per document.
3. Notarization and apostille (overseas): Varies by country; budget USD 100–500 per document.
4. Corporate bank account setup: Generally no fee, but minimum deposit of THB 50,000–500,000 may be required by the bank.
5. Accounting software / annual auditor: THB 30,000–150,000 per year depending on transaction volume.
6. Foreign Business License application (if required): THB 20,000 government fee; legal fees additional.

7.3 Realistic Timeline

8. Frequently Asked Questions FAQ — Company Registration in Thailand

Q1: Can a foreigner own 100% of a company in Thailand?

Generally, foreigners are restricted to holding up to 49% of shares in most business sectors under the Foreign Business Act B.E. 2542 (1999). However, 100% foreign ownership is achievable through: (1) BOI promotion — the Board of Investment grants FBA exemptions to promoted companies in targeted industries; (2) Treaty of Amity — US nationals and US-majority companies may operate in most sectors with full ownership rights; (3) Industrial Estate (IEAT) — companies in approved industrial estates may obtain similar exemptions; (4) Sectors not listed in the FBA annexes — manufacturing and many export-oriented services are not restricted.

Q2: What is the minimum registered capital for a Thai company?

There is no statutory minimum registered capital for a Thai-majority Private Limited Company in an unrestricted sector. In practice, THB 1–5 million is common for small to medium operations. For foreign-majority companies requiring a Foreign Business License, the minimum is THB 3 million. BOI-promoted companies generally require a minimum investment of THB 1 million (excluding land and working capital). At least 25% of the registered capital must be paid up at the time of registration regardless of the total amount.

Q3: How long does it take to register a company in Thailand?

A straightforward Thai Private Limited Company can be registered at the DBD in 1–3 business days once all documents are properly prepared and submitted. The complete process, from initial name reservation through to tax registration and bank account opening, typically takes 2–4 weeks for a Thai-majority company. Foreign Business License applications add 60–90 days. BOI applications also typically take 60–90 days from submission to approval.

Q4: Do I need a Thai partner to set up a company in Thailand?

For sectors covered by the Foreign Business Act annexes, a Thai partner holding at least 51% of shares is required unless an FBL, BOI promotion, or Treaty of Amity exemption applies. For unrestricted sectors (many manufacturing and service activities), a Thai partner is not legally required. When a Thai partner is involved, it is strongly advisable to have a comprehensive Shareholders' Agreement in place to govern decision-making, dividend distribution, exit rights, and deadlock resolution mechanisms.

Q5: What are the ongoing compliance obligations after company registration?

After registration, a Thai company must comply with: (1) annual statutory audit — financial statements must be audited by a licensed Certified Public Accountant (CPA); (2) annual filing with DBD — audited financial statements and balance sheet filed within 5 months of the fiscal year end; (3) corporate income tax return (CIT) — filed with the Revenue Department twice per year (mid-year and year-end); (4) VAT returns — filed monthly; (5) social security contributions — filed monthly for all employees; (6) withholding tax filings — monthly and annually. Failure to comply may result in fines, director liability, and potential dissolution.