The 51/49 rule: what does it actually restrict, and what does it not?
The Foreign Business Act restricts what a company that is half or more foreign owned may do, not what foreigners may own: at 49% foreign shareholding the company is Thai in the eyes of the Act, and the restricted lists do not apply to it. The rule says nothing about control, nothing about land and nothing about visas; those live in other laws, which is why the number 49 answers less than people expect it to.
Last reviewed 28 September 2026
Where the rule actually comes from
There is no law called the 51/49 rule. Section 4 of the Foreign Business Act B.E. 2542 defines a Thai registered company as a foreigner when half or more of its shares are held by foreign persons, and the Act then restricts what a foreigner may do in three annexed lists. Keep foreign holdings at 49% and the company is not a foreigner, so none of the lists apply. That is the whole mechanism.
| List | What it covers | Can a foreign company do it? |
|---|---|---|
| List 1 | Nine businesses closed for special reasons: newspapers and broadcasting, rice farming, livestock, fishing in Thai waters, Thai herb extraction, trading Thai antiques, making Buddha images, and land trading. | No. Closed to foreigners outright. |
| List 2 | National safety, arts and culture, natural resources and environment. | Only with Cabinet level permission, with minimum Thai shareholding and Thai directors set by section 15. Rarely granted in practice. |
| List 3 | Businesses where Thais are deemed not yet ready to compete: accounting, legal, architecture and engineering services, most construction, restaurants, wholesale and retail below capital thresholds set in the list, and a catch-all for other service businesses. | Yes, with a foreign business licence from the Director-General. The catch-all is why almost every foreign owned service company needs one, or an exemption. |
What 49% does not buy you
- Not control. Ordinary shareholder resolutions pass by majority, so a genuine 51% Thai side outvotes you unless the articles of association and share classes are structured otherwise, negotiated openly with real Thai investors. Structure papered over funding that was never theirs is a nominee arrangement, which is a criminal offence for both sides.
- Not land. Land ownership is governed by the Land Code, not the Foreign Business Act, and it applies its own stricter test to part foreign companies, with land offices examining where the Thai shareholders’ money came from.
- Not a work permit. The right of the company to operate and the right of a foreigner to work in it are separate regimes. The ratio and capital criteria apply whatever the shareholding split.
The legitimate routes to foreign majority
- A foreign business licence under List 3, applied for at the DBD and decided by the Director-General with the Foreign Business Committee.
- BOI promotion: a promoted company applies for a foreign business certificate under section 12, which is granted as of right for the promoted activity. This is the route most foreign owned service businesses of any size actually take.
- The Treaty of Amity for US citizens and US majority companies, which allows majority American ownership in most sectors through a foreign business certificate.
- IEAT: businesses operating in an Industrial Estate Authority of Thailand estate, for the permitted activity.
Since 1 August 2026 the registrar also checks the money behind Thai shareholders whenever foreigners hold any shares at all, or a foreigner signs for the company: three months of bank statements per Thai shareholder, filed with the incorporation. The mechanics are in the registration manual, and what firms charge to structure all of this properly is on the cost page.
Related questions
- Nominee shareholders: why firms still offer them, and what the risk actually is
- How much registered capital does a Thai company actually need?
- Can a foreigner be the sole director of a Thai company?
Sources
- Foreign Business Act B.E. 2542, official English translation with the three lists (BOI)
- Lorenz & Partners: who requires a foreign business licence, and the exemptions
- Order of the Central Partnership and Company Registration Office 2/2569, Royal Gazette 27 July 2026 (Thai, PDF)
This is general information about how a filing works, not accounting or tax advice for your company. Confirm anything that matters against the official notice or with your accountant. Spotted something out of date? Tell us and we will fix it.