Setting Up a Company in Thailand: The Honest Guide for Foreign Entrepreneurs
Thailand is not Singapore. Anyone who tells you otherwise is either trying to sell you something or hasn't tried to actually run a business here. The bureaucracy is real, the legal restrictions on foreign ownership are substantive, and the banking system will test your patience in ways that Singaporean MAS regulation simply doesn't permit.
And yet.
For the right type of business, in the right structure, Thailand remains one of the more compelling Southeast Asian operating environments. The cost base is genuinely low. The geographic position — central to the ASEAN region, with direct connectivity to China, India, and every major Southeast Asian market — is exceptional. The BOI incentive framework, for qualifying businesses, is among the most generous in the region. And the combination of a large, educated workforce and a relatively stable macroeconomic environment gives serious businesses a foundation to build on.
The question isn't whether Thailand can work for a foreign entrepreneur. The question is whether your specific business model, your capital capacity, and your willingness to navigate genuine structural complexity add up to a viable case. This guide gives you the honest picture so you can make that determination clearly.
I've worked with and through Thai corporate structures for years. What follows is the substantive reality, not the promotional version.
The Foreign Business Act: What It Restricts and What It Doesn't
The Foreign Business Act B.E. 2542 (1999) is the central piece of legislation governing what foreign businesses can and cannot do in Thailand. Understanding its structure is the prerequisite for everything else in this guide.
The Act defines a "foreign business" as a juristic person with more than 49% of shares held by foreign nationals or foreign juristic persons. A company with 51% Thai ownership and 49% foreign ownership is, under the Act, technically a Thai company — though this classification comes with its own complications, which I'll address.
The FBA organizes restricted business activities into three lists:
List 1 — Prohibited to foreigners absolutely: Activities on List 1 cannot be conducted by foreign businesses under any circumstances, with no exceptions. This list includes rice farming, livestock farming, forestry, Thai antique trading, Buddha image making, and land trading. These are nationally sensitive sectors and the prohibition is firm.
List 2 — Restricted, with Cabinet approval possible: List 2 covers activities involving national safety, cultural heritage, or natural resources — examples include domestic aviation, land transport, Thai antique trade, and certain media. A foreign business can enter these sectors only with Cabinet approval, which is rare in practice.
List 3 — Restricted, but a Foreign Business License (FBL) is available: List 3 is the operationally relevant category for most foreign entrepreneurs. It includes service businesses, accounting, legal services, architecture, advertising, retail under certain thresholds, hotel businesses (excluding management), and a range of others. A foreign entity can operate in List 3 categories by obtaining a Foreign Business License from the Department of Business Development — a process that is possible but substantive.
What's open to foreigners without restriction:
Manufacturing is generally not restricted under the FBA. Export-oriented manufacturing, in particular, is openly accessible. Import-export trading of goods is similarly open (though specific products may be subject to other sectoral regulations). Technology businesses, software development, and digital services have generally been accessible — though the FBA's definitions can be ambiguous in fast-moving sectors and legal advice is worth getting before assuming you're in the clear.
The Department of Business Development publishes the full lists and handles FBL applications. For a business that falls on List 3, engaging DBD early in the process — or engaging a lawyer who deals with them regularly — is more productive than trying to interpret the lists in isolation.
Thai Limited Company with Majority Thai Shareholders
The most common structure for foreigners who want to operate a business in Thailand without BOI promotion and without falling into prohibited categories is a Thai Limited Company (บริษัท จำกัด) where Thai nationals hold 51% or more of the shares.
On paper, this is straightforward. The company is Thai. It can operate freely in most sectors. The foreign founder or investor holds up to 49% of shares, serves as a director, and runs the business day to day.
In practice, the structure requires genuine Thai shareholder participation, and this is where the complexity begins.
What "genuine" means:
The FBA has anti-nominee provisions. Thai shareholders who hold shares purely as a formality — paid a nominal sum to appear on the register with no real economic interest in the company — are nominee shareholders, and the practice is illegal under both the FBA and the Civil and Commercial Code. The Department of Business Development has investigative powers and has used them, particularly in sectors where foreign business restrictions are actively monitored.
The distinction between a legitimate Thai shareholder and a nominee isn't always bright-line. Courts and regulators look at the economic substance of the arrangement: did the Thai shareholders pay for their shares? Do they receive dividends proportionate to their holding? Do they participate in company decisions? Is there a genuine commercial rationale for their involvement?
When majority Thai structures are legitimate:
A joint venture with a genuine Thai business partner who brings capital, networks, market access, or operational capabilities to the enterprise is exactly the kind of arrangement the law intends to allow. Many of the most successful foreign-owned businesses in Thailand operate in this format — the foreign party brings technology, capital, or expertise; the Thai partner brings local relationships and regulatory capacity.
The risk is not in the structure itself. The risk is in the temptation to replicate the structure with a friend's housekeeper as a "shareholder." Don't do it.
Practical voting controls:
Within a legitimately structured Thai company, there are legal mechanisms to give the minority foreign shareholder meaningful operational control — supermajority voting requirements for key resolutions, weighted voting provisions in the Articles of Association, and properly drafted shareholders' agreements governing distributions and management rights. These don't change the fundamental legal risk if the underlying ownership is nominee-based, but they do provide appropriate protection in legitimate joint ventures.
BOI Promotion: The Cleaner Path for Qualifying Businesses
The Board of Investment route is, for businesses that qualify, significantly more attractive than a nominee-structured Thai company. It's more work upfront, but the legal position is cleaner and the incentives are genuinely substantial.
The Thai BOI promotes investment in target sectors through a tiered incentive system. Promoted businesses receive a package that can include:
- Corporate income tax holidays: 3, 5, or 8 years of full exemption from corporate income tax, depending on the activity category and the merit-based factors (R&D spend, advanced technology, regional HQ status, etc.)
- Import duty exemptions: on machinery and raw materials used in production
- Land ownership rights: BOI-promoted foreign companies can own land for business operations — a significant exception to the general prohibition
- Streamlined work permits: promoted companies receive expedited work permit processing and more favorable Thai employee ratios
- No cap on foreign shareholding: promoted companies can be 100% foreign-owned regardless of the Foreign Business Act restrictions, for activities within their promotion certificate
Which businesses qualify:
BOI targets a specific set of priority sectors that shift over time as Thailand's economic development priorities evolve. Current priority areas include:
- Advanced manufacturing (automotive components, electronics, aerospace)
- Digital and technology businesses (software, data centers, digital services, fintech)
- Medical and healthcare (medical devices, pharmaceutical manufacturing)
- Agricultural processing and biotechnology
- Logistics and regional headquarters operations
- Creative industries under specific definitions
The BOI also has merit-based incentives that can enhance a standard promotion — companies that invest in R&D, locate in Special Economic Zones or lower-income provinces, or employ workers with specialized skills can qualify for enhanced tax holidays.
The application process:
A BOI application is a substantive document — a business plan, investment plan, employment projections, and technical specifications of the activity. Processing typically takes 60–90 days for standard applications. The BOI has English-language staff and an investor service center, and the application process, while thorough, is navigable with proper preparation.
Approval is not guaranteed, and the BOI evaluates whether the proposed activity genuinely fits within promoted categories and whether the projected investment and employment figures are credible. Applications that are clearly fishing expeditions for tax breaks on activities the BOI doesn't prioritize tend to be rejected.
For businesses that genuinely fit BOI criteria, I strongly recommend engaging directly with the BOI's investor service center early in the planning process. Their pre-investment consultation service is free and useful.
Treaty of Amity: The American Advantage
If you hold US citizenship, you have an option unavailable to most other foreign nationals: the Treaty of Amity and Economic Relations between the United States and Thailand (signed 1966, ratified 1968).
Under the Treaty, American citizens and American-majority-owned companies can operate businesses in Thailand under the same conditions as Thai nationals — specifically, they are exempt from most of the Foreign Business Act restrictions that apply to other foreign nationals.
In practice, this means a US-majority-owned company can:
- Hold majority or 100% foreign ownership
- Operate in most List 3 FBA restricted activities (with some exceptions)
- Own land for business use in certain circumstances
The Treaty doesn't cover everything — List 1 prohibited activities remain closed, and communications, transport, fiduciary functions, banking, land ownership for investment (rather than use), and domestic trade in agricultural products are explicitly carved out.
Obtaining Treaty of Amity protection:
To use the Treaty, the company must register as an American company under the Treaty — a process handled through the DBD with documentation from the US Embassy in Bangkok confirming US citizenship and US majority ownership. The process adds a registration step but is well-established and generally straightforward.
For American entrepreneurs, the Treaty of Amity is often the cleanest structural solution — cleaner than a nominee-structure Thai company and requiring less capital commitment upfront than a full BOI application. Whether it applies to your specific business activity is a legal question worth getting answered early.
Branch Offices and Representative Offices
Two additional structures exist for foreign companies seeking a presence in Thailand without incorporating a local entity.
Branch Office:
A branch office is an extension of the foreign parent company — the parent is directly liable for the branch's activities and obligations. Branch offices can engage in revenue-generating activities, but they're subject to the same FBA restrictions as any foreign business and require a Foreign Business License if operating in restricted sectors. They're most commonly used by companies with established regional operations who need a Thai presence for a specific project or client relationship.
Branch offices file separate Thai tax returns and pay corporate income tax on Thai-sourced income. Transfer pricing between the head office and branch is subject to Thai Revenue Department scrutiny.
Representative Office:
A representative office is explicitly non-revenue-generating. It can engage in activities like market research, sourcing support, quality control, and liaison functions — but cannot directly sell, take orders, or generate income in Thailand. The attraction is lower regulatory burden; the constraint is significant.
Representative offices are useful for companies doing genuine market research before committing to a Thai presence, or for manufacturing companies who need a sourcing liaison without a full commercial operation. They're not a workaround for the FBA — regulators scrutinize representative offices that appear to be conducting commercial activities under the cover of "liaison" functions.
Practical Costs: What You'll Actually Spend
Registration and ongoing compliance costs in Thailand are modest by developed-market standards but not trivial, and they're frequently understated in promotional materials targeting foreign entrepreneurs.
Company registration:
A Thai limited company registration at the DBD costs approximately THB 5,000–10,000 in government fees, depending on registered capital. Professional fees for a lawyer or accounting firm to handle the registration documentation typically run THB 15,000–40,000 for a standard incorporation. If you need a FBL application simultaneously, add THB 50,000–150,000 for professional preparation fees and additional government fees.
Registered capital:
A standard Thai limited company requires a minimum registered capital of THB 1 million (approximately USD 27,000 at current rates) to apply for a work permit for a foreign director. For a company with BOI promotion, capital requirements are set by the BOI investment plan and are typically substantially higher (THB 1–2 million minimum, often more for the sectors BOI targets).
Note that "registered capital" and "paid-up capital" are distinct. The minimum paid-up capital at registration is 25% of registered capital. The remainder is called up as needed. However, actual cash in the company's Thai bank account will be scrutinized for work permit and visa applications — having the registered capital paid in is strongly advisable.
Annual compliance:
- Accounting: Monthly bookkeeping for a small company costs THB 3,000–8,000/month with a Thai accounting firm. Don't try to manage this without a Thai accountant — the VAT filing and withholding tax requirements are detailed and error-prone for those unfamiliar with the system.
- Annual audit: All Thai limited companies must have their accounts audited by a certified Thai CPA. Audit fees for small companies run THB 15,000–30,000 annually.
- Annual return filing: DBD requires an annual balance sheet filing. Your accountant handles this as part of their service.
- Corporate income tax: Standard rate is 20% of net profit, with reduced rates (15% or lower) available for SMEs below certain thresholds. BOI-promoted companies enjoy their tax holiday period before standard rates apply.
For the full picture on Thai tax implications for company structures — including how personal income tax interacts with corporate structures and dividend distribution — see my Thailand tax guide.
Work Permits and Visas: The Practical Reality
Foreign nationals working in Thailand — including as directors of their own Thai companies — require a valid work permit. This is not optional, and working without one (even as a company director attending a board meeting) carries real penalties.
The 4:1 ratio:
Thai law generally requires that companies sponsoring a foreign work permit employ at least four Thai nationals for each foreign work permit holder. For a small startup, this means you need four Thai employees on the payroll before you can get a single foreign work permit — and those employees must be legitimate, with social security contributions paid.
This ratio requirement is one of the most significant operational constraints for small foreign-owned businesses in Thailand. BOI-promoted companies receive preferential treatment, and the BOI can approve reduced ratios or modified requirements as part of the promotion terms. For non-BOI companies, plan your hiring accordingly.
Minimum salary requirement:
Foreign work permit holders must receive a minimum monthly salary set by nationality (varying between THB 35,000 and THB 50,000 per month for most Western nationalities). This is a floor, not a ceiling, and your Thai accountant will confirm the applicable figure for your passport.
Non-B visa:
Work permit applications require a valid Non-Immigrant B (Business) visa, which is issued at Thai embassies abroad and is typically initially valid for 90 days, then extended to one year. The extension is tied to the work permit and requires annual renewal with updated company documents.
LTR Visa as an alternative:
For entrepreneurs who qualify on capital or income thresholds, the Long-Term Resident (LTR) Work-From-Thailand visa is worth examining as an alternative to the traditional Non-B + work permit path. LTR visa holders who work remotely for foreign employers or run foreign-sourced businesses may not require a Thai work permit for those activities. The LTR visa guide covers the qualification criteria in detail — the Wealthy Global Citizen and Work-From-Thailand Professional categories are the most relevant for foreign entrepreneurs.
The LTR and the traditional BOI/Thai company work permit path serve different use cases. If you're building a Thai-operating business with Thai clients, revenue, and staff, you need a work permit. If you're running a globally-oriented business from a Thai base, the LTR may provide a cleaner framework.
Banking for Your Thai Company: The Underrated Challenge
Opening a corporate bank account in Thailand as a foreign director is one of the most consistently frustrating parts of establishing a Thai business presence. The Thai banking system is conservative, KYC requirements have tightened substantially since 2020, and certain banks are significantly more hospitable to foreign-owned or foreign-directed companies than others.
Which banks work well:
Bangkok Bank is generally considered the most internationally oriented of the Thai commercial banks and has historically been the most willing to work with foreign businesses. Kasikorn Bank (KBank) is also workable and has strong digital banking infrastructure. SCB and Krungthai are functional but can be more bureaucratic.
For fully BOI-promoted companies, the BOI's investor service center can assist with banking introductions — a significant practical advantage.
What you'll need:
- Company registration certificate (DBD certificate of incorporation)
- Company affidavit (a notarized document confirming directors and shareholders — issued by DBD, valid for 3 months, so timing matters)
- Articles of Association and Memorandum
- Shareholders' register
- BOI promotion certificate (if applicable)
- Passport copies and Thai address confirmation for all authorized signatories
- Work permit and Non-B visa copies for foreign directors
In-person attendance by at least one director is typically required. Some banks will require all directors on the account to appear in person. Plan for this — scheduling it across multiple nationalities and locations can take time.
Corporate account functionality:
A Thai corporate account can hold THB and, at Bangkok Bank and certain others, maintain foreign currency sub-accounts. International wire transfers are generally functional, though large outbound transfers attract reporting requirements. Payment processing for e-commerce requires a separate merchant account setup, which adds another layer of banking relationships.
FAQ
Can I own 100% of a Thai company as a foreigner?
Yes, but with significant conditions. BOI-promoted companies can be 100% foreign-owned for their promoted activities. American citizens using the Treaty of Amity can own majority or 100% in most sectors. Without BOI promotion or Treaty of Amity, 100% foreign ownership places the company squarely within the FBA restrictions, and operating in restricted sectors without a Foreign Business License is an offense.
How long does BOI approval take?
Standard applications are processed within 60–90 days of a complete submission being accepted. The BOI has a pre-application consultation service that can significantly reduce the risk of a submission being rejected for technical deficiencies. Budget 3–4 months from start to promotion certificate.
What happens if my Thai company doesn't turn a profit — do I still need to file accounts?
Yes. All Thai limited companies must file annual financial statements regardless of whether they generated revenue or profit. A dormant company with no activity still requires a certified audit and annual DBD filing. Factor ongoing compliance costs into your business case even if the company isn't generating income yet.
Is a Thai BOI company taxed differently from a standard Thai company?
BOI-promoted companies receive corporate income tax exemptions for their promoted activities for the duration of the approved holiday period (typically 5–8 years for high-priority sectors). After the holiday expires, they're subject to standard corporate income tax rates. The exemption applies to income from promoted activities — income from non-promoted activities in the same entity is taxable from the start. Structuring promoted vs. non-promoted revenue streams cleanly is an accounting and legal issue worth getting right from day one.
Do I need a Thai lawyer to set up a company, or can I use an online service?
For a straightforward Thai majority-owned company in an unrestricted sector, online registration services exist and are usable. For anything involving BOI applications, Foreign Business Licenses, Treaty of Amity registration, complex shareholding arrangements, or restricted sectors, use a qualified Thai lawyer. The cost of getting the structure wrong substantially exceeds the cost of proper legal advice at the outset.
Thailand's business environment rewards entrepreneurs who do the homework. The restrictions are real, the compliance overhead is genuine, and the banking system will frustrate you at least once. But the BOI incentive framework is among the best in Southeast Asia for qualifying businesses, the cost structure is highly competitive, and the market access — both regionally and into a domestic economy of 70 million people — is substantial.
The key is choosing the right structure for your specific situation and capitulating to the reality that this requires proper professional guidance. The entrepreneurs who struggle most in Thailand are typically those who tried to take shortcuts on structure and are now managing the consequences. The ones who thrive are those who treated the setup phase as a serious investment and built on a solid foundation.
For the personal finance and tax implications of operating through a Thai entity as a foreign resident, the Thailand tax guide covers the interaction between corporate structures, personal income, and Thailand's remittance-based tax system — essential reading if you'll be drawing income from your Thai company as a resident here.
