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Non-O is Thailand's Non-Immigrant category O visa, for people who come to live in Thailand for personal reasons rather than to work: retirement, joining a Thai spouse, or joining a parent as a dependent child. A Thai embassy or consulate issues it abroad, and Thailand's immigration offices then extend the stay, usually a year at a time, for as long as the reason still holds.
Where Non-O comes up: marriage, retirement, children
Retirement is one of the grounds for Non-O, alongside Thailand's O-A and O-X visas for retirees, which carry their own age, funds and insurance conditions; our retirement visa guide compares all three.
Marriage to a Thai national is the second ground: the foreign spouse applies abroad, then extends the stay in Thailand as a family member.
The third is a child. A child joining a foreign parent who lives and works in Thailand, and who lives with the family, usually gets a single-entry Non-O, first stay capped at 90 days, then yearly extensions tied to the parent's own status; adopted children and a spouse's children qualify. For the family extension, the child must be unmarried and live as part of the family household, as the official procedure summary 001_01_122 sets out. The Royal Thai Embassy in London lists the child as under 20 for the visa stage, while that same official procedure summary uses "not over 20" for the extension — check which wording applies before the child turns 20. Whether a child can join a retired parent this way is not clearly confirmed; ask the embassy and the immigration office before planning. A parent of a Thai child can use the same family Non-O as a spouse, no marriage required, while the child is under 20; an unmarried father needs his paternity legally established first, by registering legitimation or by a court judgment under Civil and Commercial Code ss. 1547-1548.
How Non-O differs from O-A, O-X and Non-B
Non-B is the work visa, tied to a named employer and a work permit under Immigration Act s. 37(1) and the Emergency Decree on Managing the Work of Foreigners B.E. 2560; Non-O alone gives no right to ordinary employment. O-A, O-X and the retirement Non-O differ in their age, funds and insurance conditions, covered in our retirement visa guide. Family-based Non-O (spouse, child or parent of a Thai child) usually asks for proof of the relationship, and missions may also ask for financial documents depending on the basis and stage — check the embassy's own requirements where you apply; children also face an age limit.
What to check before applying
We advise applying at the embassy or consulate in the country where you live, and checking its own document and translation rules before you book, since missions differ. A visa does not guarantee entry: the immigration officer at the border decides on the day.
We have not found official confirmation that this category can be switched to from inside Thailand, so check with the embassy before counting on a visa-exempt entry followed by a change of status. Whoever provides your accommodation — usually the owner or the hotel — must file the TM30 address notice (Immigration Act B.E. 2522 s. 38), and if you stay 90 continuous days you will also need the TM.47 90-day report (s. 37(5)); our guide to TM30 and the 90-day report explains both.
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