Normally to start a business in Thailand, it must have Thai ownership of at least 51%.
But for those American Citizens who want full control, there is the Treaty of Amity. It allows American Citizens to start a business in Thailand and retain 100% ownership of that business.
However such a business has more restrictions that a standard limited liability company in Thailand. The company cannot do the following kinds of businesses:
The setup of this kind of company is a bit more involved and takes a while longer than a standard Thai Limited Liability company, but it can be surely done.
If you need help to setup such a company please contact us at the links below.