Most foreign founders use a private limited company registered with the Department of Business Development (DBD). Two or more promoters sign the memorandum of association, shares have a par value of at least THB 5, and at least 25% of each share is paid before registration. The memorandum and the company can be registered on the same day.
The Foreign Business Act
The Foreign Business Act of 1999 treats a company registered in Thailand as foreign when foreigners hold half or more of its shares. Such a company may not operate the businesses in List One; List Two needs the Minister's permission with Cabinet approval, and List Three a licence from the DBD's Director-General with the approval of the Foreign Business Commission. Its minimum capital is at least THB 2 million, and at least THB 3 million for a business that needs permission under the lists.
The routes the law offers
| Route | Legal basis | What it gives |
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| Thai majority, foreign shares under half | Foreign Business Act, s. 4 | Outside the Act; the DBD asks for bank evidence of each Thai shareholder's investment when foreigners hold under half or a foreigner signs for the company |
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| BOI investment promotion | Foreign Business Act, s. 12 | A certificate from the DBD for a List Two or List Three activity, valid while the promotion lasts |
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| Foreign Business Licence | Foreign Business Act, s. 8 and 17 | Permission for a List Three activity from the DBD's Director-General |
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| Treaty | Foreign Business Act, s. 10 | Exemption on the terms of a treaty that binds Thailand; the BOI's 2026 guide names the Treaty of Amity for US investors |
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Directors, staff and work permits
A foreign director who works in the company needs a visa and a work permit. The BOI's 2026 guide lists the usual conditions on the employer: THB 2 million of registered capital and four Thai employees for each work permit. After registration the company obtains its corporate tax ID from the Revenue Department within 60 days.
Redomiciled coordinates the formation with licensed Thai lawyers and accountants, who give the legal and tax advice.