Tourists who want to travel to Thailand without getting a visa beforehand can apply for a “free visa,” or Por.30 visa, when they arrive, having only a passport. They will be permitted to travel around the country for no more than 30 days comfortably. But first, they must come from one of the 56 visa-exempt countries. When you arrive and present your passport at the immigration counter, the immigration officer will consider it on a case-by-case basis. There must be evidence showing that you will leave Thailand after the end of your stay, such as a plane ticket or other proof that you can return to your country of residence, or that you will continue to travel to another country, in case of transit.
The Por.30 “free visa” is for tourism purposes only. Do not work and do not stay longer than the permitted period. If you stay over the allowed period, you will be fined at the rate of 500 baht per day, but not more than 20,000 baht, and will not be allowed to travel back into the Kingdom of Thailand.
But if you want to stay longer than 30 days, you may apply for an extension of stay from the Immigration Office.
In the case of nationals of Brunei Darussalam, the Republic of Indonesia, the Republic of Singapore, and Malaysia who enter at the immigration or border checkpoint that is adjacent to the land border more than two times per calendar year, they will be allowed to stay for no more than 30 days at a time.
Source : Immigration Bureau
Tel : +66 2-572-8500