Thailand has become an increasingly attractive destination for foreign entrepreneurs, and in 2026 the process of starting a business here is more streamlined than ever. However, there are important legal distinctions and procedural requirements that differ significantly from Western countries. As an attorney who has helped hundreds of foreign clients set up businesses in Thailand, I will walk you through every step of the process with real costs, real timelines, and honest advice about the pitfalls to avoid.
Choosing the Right Company Type
Before you start the registration process, you need to decide what type of business entity to establish. The most common options for foreigners are the Thai Limited Company, the Sole Proprietorship, the Partnership, and the Branch or Representative Office of a foreign company. For 90% of foreign entrepreneurs, the Thai Limited Company is the right choice, and I will focus primarily on that structure. A Thai Limited Company provides limited liability protection for shareholders, can be used to obtain Non-B visas and work permits for foreign employees, and is recognized by Thai banks and government agencies for all banking and business purposes. It requires a minimum of 3 shareholders and at least 1 director. A Sole Proprietorship is the simplest structure but is only available to Thai nationals or foreign nationals with a valid work permit in specific professions. It does not provide limited liability, and foreigners generally cannot use this structure. A Partnership (either Ordinary or Limited) is possible but rare for foreign-owned businesses because of liability exposure and tax complications. A Representative Office or Branch Office of a foreign company is used when a foreign parent wants a presence in Thailand without a separate Thai entity, but a Representative Office cannot generate revenue in Thailand.
Foreign Business Act and Ownership Restrictions
The Foreign Business Act (FBA) of 1999 is the most important piece of legislation affecting foreign business ownership in Thailand. The FBA maintains three lists of business activities. List 1 covers businesses absolutely prohibited to foreigners, including newspapers, radio broadcasting, farming, forestry, and Thai traditional medicine. No foreign ownership is possible in these sectors. List 2 covers businesses restricted to foreigners unless approved by the cabinet, including domestic transportation, mining, and some manufacturing. Foreign ownership is limited to 40-49 percent depending on the activity. List 3 covers businesses that require a Foreign Business License (FBL) for foreign majority ownership, including most service businesses, retail and wholesale, construction, advertising, and tourism. A Thai company with 51 percent or more Thai ownership is not considered foreign under the FBA and can engage in any permitted business activity.
This is where the concept of nominee shareholders comes in. Some foreigners use Thai nationals as nominee shareholders to meet the 51 percent Thai ownership requirement. The Thai government has been cracking down on this practice, and if discovered, the company can be dissolved and shareholders fined. Legitimate structures include having Thai partners who genuinely participate in the business, using an Amity Treaty company if you are American (the US-Thailand Treaty of Amity exempts American-owned companies from most FBA restrictions), or obtaining BOI promotion which can waive FBA restrictions.
Step-by-Step Registration Process
Here is the complete process for registering a Thai Limited Company, from start to finish.
Step 1: Name reservation. Search and reserve your company name through the Department of Business Development (DBD) website or at the DBD office. You submit three name options in order of preference. The name must end with Limited or Company Limited. Reservation costs 20 THB per name and is valid for 30 days. Processing takes 1 to 2 business days.
Step 2: Prepare the Memorandum of Association (MOA). The MOA is a foundational document that includes the company name, objectives (business activities), registered capital amount, province of registration, and names of the three promoters. The MOA must be filed with the DBD. The filing fee is 20 THB per 100,000 THB of registered capital, with a minimum of 500 THB and maximum of 25,000 THB. For a company with 1 million THB registered capital, the fee is 200 THB.
Step 3: Hold the statutory meeting. The promoters call a meeting of prospective shareholders to adopt the articles of association, appoint the first directors and auditor, and finalize the company structure. Minutes of this meeting must be prepared and signed.
Step 4: Register the company. Within 3 months of the MOA filing, submit all registration documents to the DBD. Required documents include the MOA, articles of association, statutory meeting minutes, list of shareholders, director consent forms, and power of attorney if using a lawyer. The registration fee is 5,000 THB per 1 million THB of registered capital, with a maximum of 250,000 THB. For a company with 1 million THB registered capital, the fee is 5,000 THB. Processing takes 3 to 7 business days.
Step 5: Obtain a company seal and tax ID. After registration, the DBD issues a company registration certificate. You then apply for a corporate tax ID from the Revenue Department, which takes 1 to 2 business days. Open a corporate bank account using the registration documents.
Step 6: Register for VAT (if applicable). If your annual revenue is expected to exceed 1.8 million THB, you must register for VAT within 30 days of reaching that threshold. VAT registration is done at the local Revenue Department office.
Real Costs and Timeline
Here is a realistic cost breakdown for setting up a Thai Limited Company with 1 million THB registered capital using a law firm, which is what I recommend for most foreign entrepreneurs.
Legal fees: 25,000-60,000 THB depending on the complexity of the company structure and the law firm you choose. Government fees: 5,000-10,000 THB (name reservation, MOA, registration, tax ID). Translation and notarization of foreign documents: 2,000-5,000 THB. Company seal: 500-1,000 THB. Opening corporate bank account: free but initial deposit of 10,000-100,000 THB depending on the bank. Accounting setup with a Thai accountant: 3,000-8,000 THB per month ongoing.
Total one-time setup cost: approximately 35,000-80,000 THB ($980-2,240). The entire process from name reservation to receiving your registration certificate takes approximately 2 to 4 weeks if all documents are in order.
Registered Capital Requirements
Registered capital is the amount of capital declared in the company registration documents. For a company with foreign employees needing work permits, the minimum registered capital depends on the number of foreign employees. The general rule is 2 million THB per foreign employee, though this can vary by business type and location. Some exemptions and reductions apply for BOI-promoted companies.
At least 25 percent of the registered capital must be paid in within the registration period. For a company with 1 million THB registered capital, at least 250,000 THB must be deposited in the corporate bank account. This money belongs to the company and can be used for business operations.
Board of Investment (BOI) Promotion
The Board of Investment (BOI) offers significant incentives for companies operating in promoted industries. BOI promotion can grant permission for foreign majority ownership in restricted sectors, tax holidays of 3 to 8 years on corporate income tax, import duty exemptions on machinery and raw materials, permission to own land (normally prohibited for foreign-owned companies), and permission to bring in foreign technicians and experts.
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Eligible sectors include digital technology, e-commerce, software development, biotechnology, renewable energy, advanced manufacturing, logistics, medical services, tourism (certain categories), and agriculture processing. The BOI has been expanding eligible categories to attract digital economy companies and startups.
The BOI application process takes 2 to 4 months and involves submitting a detailed business plan, financial projections, and evidence of expertise or technology transfer. Legal fees for BOI applications run 80,000-200,000 THB depending on complexity. The benefits can be substantial, particularly the ability to have 100 percent foreign ownership in sectors normally restricted by the FBA and the long tax holidays that dramatically reduce operating costs during the crucial early years.
Tax Obligations
Thai companies face several tax obligations. Corporate Income Tax (CIT) is 20 percent on net profits for standard companies, with a reduced rate of 15 percent for SMEs with paid-in capital below 5 million THB and revenue below 30 million THB. VAT is 7 percent on goods and services (reduced from the standard 10 percent, currently extended through September 2026). Businesses with annual revenue below 1.8 million THB are exempt from VAT registration. Withholding tax applies to various payments including service fees (3 percent), rent (5 percent), and dividends (10 percent). Specific Business Tax applies to certain financial services at 3 percent.
Personal Income Tax for directors and employees follows progressive rates from 5 percent to 35 percent on income above 5 million THB per year. Social Security Fund contributions are 5 percent of wages up to a maximum of 750 THB per month per employee, matched by the employer.
Companies must file monthly VAT returns (if registered), monthly withholding tax returns, and half-yearly and annual corporate income tax returns. Annual financial statements must be audited by a certified Thai auditor and filed with the DBD and Revenue Department within 150 days of the fiscal year end.
Accounting and Compliance Requirements
Every Thai company must maintain proper accounting records in Thai language, following Thai Accounting Standards. You need a Thai accountant or accounting firm to handle bookkeeping, tax filings, and annual audits. Monthly accounting fees range from 5,000 to 15,000 THB depending on transaction volume.
Annual compliance costs include audited financial statements (15,000-40,000 THB), corporate income tax filing (often included in the accounting fee), and DBD annual returns. Non-compliance penalties can be severe, including fines of up to 200,000 THB and potential dissolution of the company.
Work Permits for Foreign Employees
If your company needs to hire foreign employees, each one needs a Non-B visa and a work permit. The work permit process requires a minimum registered capital of 2 million THB per foreign employee, a ratio of 4 Thai employees per foreign employee (some exemptions apply), and the foreign employee must hold a position that a Thai national cannot fill. Work permit fees are 3,000 THB for a one-year permit and 1,500 THB for a six-month permit.
The employer must also pay into the Social Security Fund for each employee, Thai and foreign, at 5 percent of salary up to a maximum of 750 THB per month. Work permit processing typically takes 2 to 4 weeks after submission of all required documents.
Common Mistakes to Avoid
The biggest mistake foreign entrepreneurs make is choosing the wrong company structure. Setting up a company that cannot legally do what you need it to do -- because of FBA restrictions, insufficient capital, or incorrect business objectives -- wastes time and money. Consult with a qualified Thai business lawyer before starting the registration process.
Another common mistake is underestimating ongoing compliance costs. Many people focus on the setup costs and forget that monthly accounting, annual audits, tax filings, and banking compliance add 60,000-180,000 THB per year in ongoing costs.
Using nominee shareholders is risky and increasingly scrutinized. If your Thai shareholders are genuine partners, document their contributions and roles clearly. If they are nominees, understand the legal risks involved.
Finally, do not operate your business before the company is registered and the tax ID is obtained. Doing so creates tax and legal complications that are expensive to resolve.
US-Thailand Treaty of Amity
American citizens have a significant advantage through the US-Thailand Treaty of Amity and Economic Relations. Under this treaty, American-owned companies can hold majority ownership in most business sectors that are otherwise restricted to Thai nationals under the FBA. The company must be incorporated in Thailand with a minimum of 51 percent American ownership. Treaty companies must register with the Department of Commercial Registration and provide proof of American nationality. This is a genuine legal pathway to majority foreign ownership that is not available to other nationalities.
Final Recommendations
Start by consulting with a Thai business lawyer who has experience working with foreign clients. Budget 35,000-80,000 THB for setup costs and 5,000-15,000 THB per month for ongoing accounting and compliance. Consider BOI promotion if your business operates in an eligible sector, as the benefits of foreign ownership and tax holidays can be transformative. Register sufficient capital to support your business plan and any work permits you need. And maintain proper compliance from day one -- the penalties for non-compliance far exceed the cost of doing things correctly.
