Foreigners who intend to reside in Thailand for a longer term should apply for a Non-immigrant visa, in the category suitable for the purpose of their stay. The initial visas obtained from the Thai Embassy abroad is valid for 90 days, can be extended at the immigration office in Thailand and are thereafter renewable annually. An existing tourist visa with sufficient validity may also be converted to a Non-immigrant visa at the immigration office if the supporting documents are in order.
|Diplomatic and consular services||D|
|Study or observation||ED|
|Performance of duties with the mass media||M|
|Other categories – accompanying family of those who hold another type of Non-Immigrant visa, to perform work for social welfare organisations, to be a witness in a judicial process, etc.||O|
|Missionary work or other religious activities||R|
|Scientific research or training or teaching in a research institute||RS|
|Performance of skilled or expert work||EX|