How is the foreign work permit quota calculated?

General rule: 2,000,000 THB registered capital per 1 foreign work permit, and a ratio of 4 Thai employees to 1 foreign employee. Verify current requirements with the Department of Employment.

What industries does BOI promote?

BOI promotes 8 main groups: agriculture, mining/ceramics, light industry, iron/metals, electronics/electrical, chemicals/petrochemicals, services/utilities, and modern technology. Check the current eligible activities list at boi.go.th.

LAS INVEST

Foreign Investors in Thailand — 5 Steps Before Starting a Business

Q: What is a Thai Nominee arrangement and is it legal?

A Thai Nominee is when a Thai national holds shares on behalf of a foreign investor without genuine ownership intent. This violates the FBA and carries criminal penalties for both parties.

Thundthornthep Yamoutai, Ph.D. | Legal Advance Solution Co., Ltd. | April 15, 2026 | อ่านภาษาไทย

Contents

What Is the FBA?
The 3 Business Schedules
What Does BOI Offer?
Work Permit Quota Formula
5 Common Mistakes
LAS SSCU Integration
FAQ
Summary & Next Steps

Thailand attracts foreign direct investment with its strategic location at the heart of ASEAN, strong infrastructure, and competitive BOI incentives. Yet many foreign investors start without understanding three fundamental legal constraints: the FBA, BOI, and Work Permit rules. The result is wasted capital, criminal liability risk, and forced business closure. This article explains the 5 essential steps every foreign investor must complete before operating in Thailand.

What Is the FBA — Foreign Business Act B.E. 2542

The FBA (Foreign Business Act B.E. 2542), in Thai: พระราชบัญญัติการประกอบธุรกิจของคนต่างด้าว พ.ศ. 2542, is the primary law governing which businesses foreigners may operate in Thailand.

  Definition of "Alien" under the FBA:

  Any individual without Thai nationality, or any legal entity (company) in which foreigners hold 50% or more of the shares.

  (Foreign Business Act B.E. 2542, Section 4 [section number to be verified])

In short: if you register a company in Thailand with 50% or more foreign shareholding, that company is legally classified as an "alien" under the FBA and must comply with all applicable restrictions.

The 3 Business Schedules

The FBA categorizes businesses into 3 Schedules based on the level of restriction:

Schedule	Restriction Level	Example Businesses	Verdict
Schedule 1	Absolutely Prohibited	Rice farming, livestock, forestry, fishing, Thai herbs, land trading, Thai antiques, Buddha images	❌ No exceptions
Schedule 2	Cabinet Approval	National security activities, land transport, sea fishing in Thai waters, radio/TV broadcasting, sugarcane farming, salt production	⚠️ Cabinet required
Schedule 3	DBD Approval	Retail, wholesale, advertising, hotel operations, tour operations, restaurants, accounting, legal services, architecture, engineering	⚠️ FBA License needed

🔴 High Risk — Schedule 1: Absolutely prohibited for foreigners. No exceptions apply, even with BOI promotion. Criminal penalties apply for violations.

Most businesses that foreign investors target fall under Schedule 3, which requires an FBA License from the Department of Business Development (DBD), Ministry of Commerce, before commencing operations.

What Does BOI Offer — Investment Promotion Act B.E. 2520

The BOI (Board of Investment), operating under the Investment Promotion Act B.E. 2520, is the most important legal shortcut for foreign investors. BOI can grant privileges that override normal FBA restrictions.

BOI Benefit	Details
100% Foreign Ownership	Foreigners may own 100% in BOI-promoted activities (except Schedule 1)
Corporate Income Tax Holiday	3–8 year CIT exemption depending on activity category (A1–A4)
Import Duty Exemption	Machinery and raw materials imported for production
Work Permit Facilitation	Simplified WP process; in some cases 4:1 ratio not required [T1-Training — verify with BOI]
Land Ownership	Some BOI company types may hold land for investment purposes [section to be verified]

🟡 Important: BOI does not promote every type of business. You must verify that your specific activity appears on the current BOI "Eligible Activities" list before applying. The list is updated periodically — check the latest at boi.go.th.

Work Permit Quota Formula

One of the most common surprises for foreign investors is the Work Permit Quota. Thai law imposes both a capital requirement and an employee ratio.

  General Work Permit Rules (T1-Training data — verify with Department of Employment before acting)

  📌 2,000,000 THB registered capital per 1 foreign work permit

  📌 4 Thai employees : 1 foreign employee ratio

  Reference: Foreign Workers Act B.E. 2551 [section to be verified] + related Ministerial Regulations

Foreign Employees Needed	Minimum Registered Capital	Minimum Thai Employees
1	2,000,000 THB	4
2	4,000,000 THB	8
5	10,000,000 THB	20
10	20,000,000 THB	40

🟢 BOI Exception: BOI-promoted companies can often obtain work permits through a simplified process without strict adherence to the 4:1 ratio — conditions vary by activity type [T1-Training — verify with BOI directly].

5 Most Common Mistakes

❌ Mistake 1: Using a Thai Nominee Structure

🔴 Highest Risk — Never Do This
A "Thai Nominee" is when a Thai national holds shares on behalf of a foreign investor without genuine ownership intent, to circumvent FBA restrictions. This is an explicit criminal violation of the FBA. Both the nominee and the foreign investor face criminal liability.

Option A: Apply for BOI Promotion to legally hold 100% ownership
Option B: Partner with a genuine Thai investor + execute a robust SHA to control decision-making

❌ Mistake 2: Not Checking the Schedule Before Registering

Many companies begin operating before discovering their business falls under Schedule 3 and requires an FBA License — a 30–90 day process with additional capital requirements. Prevention: consult a lawyer before registering your company.

❌ Mistake 3: Under-Capitalization

A company registered with 1,000,000 THB capital (the minimum for a Thai limited company) cannot obtain any foreign work permits. The 2,000,000 THB per-WP requirement must be planned from day one.

❌ Mistake 4: No Shareholders Agreement (SHA)

A company with 49% foreign and 51% Thai shareholding has no legal protection for the foreign investor without an SHA. The Thai 51% holder has full statutory power. A good SHA defines veto rights, quorum requirements, share transfer restrictions, and deadlock resolution.

❌ Mistake 5: PDPA Non-Compliance for Customer Data

Many foreign companies transfer Thai customer data to their overseas HQ without a legal basis under the Personal Data Protection Act B.E. 2562 (PDPA). A proper cross-border data transfer mechanism is required [section to be verified].

LAS SSCU Integration — Holistic Legal Coverage

LAS handles foreign investor matters across all 4 legal dimensions — not just company registration:

★ LAS SSCU Integration — What LAS Lawyers Do Holistically ▼

The LAS SSCU framework integrates all 4 legal dimensions to protect foreign investors throughout the full business lifecycle.

S — SHIELD (Risk Protection)

FBA Compliance Review, Force Majeure Clauses, Liability Caps, Corporate Insurance Review

C&C — Contract & Control

Board Governance, Employment Contracts, PDPA Compliance Setup, IP Assignment

U — UP (Expand & Exit)

BOI Tier Selection, Industrial Estate, ASEAN Expansion Planning, Exit Strategy (M&A / Share Sale)

FAQ — Frequently Asked Questions

Q1: Can a foreigner own 100% of a Thai company?

Yes, if the business receives BOI promotion for eligible activities, or if it is a US company qualifying under the Treaty of Amity and Economic Relations (Thailand-USA, 1966). Schedule 1 businesses have no exceptions regardless of BOI status.

Q2: How long does an FBA License take to obtain?

Schedule 3 (DBD approval): approximately 30–90 business days depending on document completeness. Schedule 2 (Cabinet approval) takes considerably longer. [T1-Training — verify current timeline with DBD]

Q3: Which industries does BOI promote?

BOI promotes 8 main groups: agriculture and agricultural products, mining and ceramics, light industry, iron and metals, electronics and electrical appliances, chemicals and petrochemicals, services and utilities, and modern technology. Check the current list at boi.go.th.

Q4: What happens if I operate without an FBA License?

Criminal penalties apply under the Foreign Business Act B.E. 2542 [section to be verified], including imprisonment and/or fines. The DBD may also order the business to cease operations and revoke the company registration.

Q5: Is a Thai Nominee arrangement legal?

No. Thai Nominee structures are an explicit violation of the FBA and carry criminal penalties for both the nominee shareholder and the foreign investor. The DBD investigates beneficial ownership. Do not use this structure.

Summary & Next Steps

Thailand offers strong investment potential, but you must follow the correct legal framework. 5 steps to take before starting your business:

Check your Schedule: Is your business in Schedule 1, 2, or 3?
Assess BOI eligibility: Is your activity on the BOI eligible list? Apply first if so.
Plan registered capital: Calculate the capital needed for your intended number of foreign work permits.
Prepare a SHA: If you need a Thai partner, execute a Shareholders Agreement before registering the company.
Consult an FBA/BOI lawyer: Have an expert review your structure before submitting any applications.

LAS INVEST #1 — Foundations for Startups & SMEs Next: Full LAS SSCU Legal Framework →

Related Laws & References

Foreign Business Act B.E. 2542 Investment Promotion Act B.E. 2520 Foreign Workers Act B.E. 2551 Personal Data Protection Act B.E. 2562 (PDPA) Treaty of Amity (Thailand-USA 1966) FBA License — DBD, Ministry of Commerce BOI Promotion — Board of Investment

Disclaimer: This article is prepared for academic and general informational purposes only. It does not constitute legal advice for any specific matter. Legal information in this article is based on T1-Training data which may not reflect the most recent legislative amendments. Readers should verify current law and consult a licensed attorney before taking any action with legal consequences. Legal Advance Solution Co., Ltd. assumes no liability for actions taken in reliance on this article.