Under the Foreign Business Act B.E. 2542 (1999), which controls investments made by foreigners, a company is deemed foreign or alien if 50% of the registered capital is held by foreigners. In addition, foreigners are prohibited from operating businesses specified in the Annex 1 list, but they may be permitted to operate businesses under List 2 or List 3, unless there is a reasonable cause not to allow it.
Source : Thailand Board of Investment 555
Tel : +66 2553 8111