Thailand is open to foreign businesses, but ownership is the question that shapes everything else. The general rule favours Thai-majority companies, while genuine exceptions, through the Board of Investment or the US Treaty of Amity, can open the door to full foreign control. Getting this decision right at the start saves a great deal of restructuring later.
The Thai-majority rule
For most business activities, the starting point is the Foreign Business Act. It restricts foreigners in many service and trading sectors, and the practical effect is that a company expecting to operate freely is often structured as Thai-majority owned, with Thai shareholders holding the larger share and foreigners a minority.
A company is generally treated as "foreign" once foreign ownership crosses a set threshold, which can trigger licensing requirements or make certain activities off-limits without special permission. Two points matter here:
- The threshold and the list of restricted activities are set by law and can change, so confirm the current rules and your specific activity with a qualified Thai lawyer before you assume you qualify.
- Nominee arrangements, where Thai shareholders hold shares on paper but a foreigner truly controls and funds them, are illegal and taken seriously, with consequences that can reach the company and the individuals involved. A genuine Thai-majority structure must be exactly that.
For many founders, a properly built Thai-majority company is a perfectly workable answer. The difficulty arises only when the activity is restricted and the foreigner wants real control, which is where the exceptions come in.
The BOI route
The Board of Investment (BOI) is Thailand's investment-promotion agency, and one of the most common paths to full foreign ownership. If your business falls within an activity the BOI is promoting, often in areas such as technology, manufacturing, certain services and targeted industries, you may be able to apply for promotion that can allow full foreign ownership in fields that would otherwise be restricted. BOI promotion can also carry other benefits, which vary by activity and over time and may include:
- permission to own land for the promoted project;
- more straightforward work permits and visas for foreign staff;
- tax incentives and easier access to foreign specialists.
The catch is that the BOI is selective. Your activity must fit a promoted category, and you generally need a credible business plan, sufficient capital and a real operation rather than a shell. The eligible categories and conditions are reviewed periodically, so treat any list you read online as a starting point and confirm what currently applies.
The Treaty of Amity exception
The US-Thailand Treaty of Amity and Economic Relations is a narrower but valuable route. It allows qualifying American-owned companies to hold majority or full ownership and operate in many sectors on broadly the same footing as Thai nationals, without BOI promotion.
It is not a blanket exemption. Some sectors, such as land, communications and certain professional and resource activities, generally remain excluded, and the company must meet nationality conditions, broadly that most shares and directors are American. For US founders whose business does not fit a BOI category, Amity certification is often the cleaner answer; for everyone else it simply will not apply. As with everything here, the precise conditions can change, so confirm the current position before relying on it.
The registration steps
Most foreign-owned companies are set up as a Thai limited company, registered with the Department of Business Development under the Ministry of Commerce. The broad sequence is fairly consistent, even though details and timing shift:
- Reserve the company name and confirm your activities and ownership structure;
- Prepare the documents, including the memorandum of association, articles and shareholder details;
- Hold the statutory meeting and register the company with the registrar;
- Register for tax, obtain a tax ID and register for VAT where required;
- Apply for any licences your activity needs, plus a Foreign Business Licence or Certificate if you are taking a BOI or Amity route;
- Open a corporate bank account and arrange work permits and visas for foreign founders and staff.
Thailand also sets minimum capital expectations that tend to differ between an ordinary Thai-majority company and a foreign-owned or BOI-promoted one, and capital levels are often linked to how many work permits you can obtain. These figures are approximate and subject to change, so confirm the current numbers with a lawyer rather than relying on an amount you saw quoted somewhere.
What foreign founders weigh
The structure decision is rarely just legal; it is also commercial. Founders typically balance a few things at once.
Control versus simplicity
A Thai-majority company is usually faster and cheaper to set up, but the foreigner holds a minority of the shares. Founders who need that arrangement often use carefully drafted shareholder agreements and share classes, lawful tools unlike nominees, to protect their position. Full ownership through BOI or Amity removes that concern but adds cost, conditions and ongoing reporting.
Cost, time and substance
BOI promotion tends to take longer and to demand a real plan and capital. For a small local service business, a Thai-majority company may be more proportionate. The right answer depends on your sector, your budget and how much you intend to operate on the ground.
Land, work permits and the long view
Foreigners generally cannot own land in their own name, which affects anyone planning premises or property-heavy operations. Work permits are tied to the company's structure and capital, so the ownership choice quietly shapes who on your team can legally work. It is worth thinking a year or two ahead, not just to opening day.
Getting it right
Registering a company in Thailand is very achievable, but the ownership rules carry real consequences, and the thresholds, promoted activities and capital figures all change over time. Because the structure you choose at the start can be expensive to unwind, it is worth speaking to a qualified Thai corporate lawyer about your specific activity and plans before you commit, so the company you build is one you can run with confidence.