For a Thai company, offering forex trading services without authorization is illegal, and the penalties for soliciting the public are serious. That is the rule behind the Bank of Thailand's warnings, and it is aimed at the recurring local schemes that collect deposits with promised returns. None of it prohibits a Thai individual from investing abroad.
The lawful route for individuals runs through the BOT's outward-investment framework, which was liberalized substantially in 2025: retail portfolio investment abroad is permitted up to a cap of around five million dollars per year with the old pre-approval requirement removed, funds moving through licensed banks. An account with an internationally regulated broker, funded through that channel, is on the right side of the line, and the broker's standard global promotions apply since no Thai rule addresses bonuses for offshore accounts.
The usual checks then apply with one local addition. The entity holding your account defines your protections, the turnover terms define the bonus's real value, and the funding path should stay inside the official channel: an offer that asks you to route money through informal rails is asking you to give up the one legal clarity Thai traders actually have.