Thailand Visa Service — All Categories

How the Thai visa system is actually structured

Thailand does not run a single points-based immigration stream. It runs a category system created by the Immigration Act B.E. 2522 (1979) and populated by ministerial regulations and Cabinet resolutions that are amended far more often than the Act itself. A visa is permission to travel to a port of entry; the immigration officer at that port grants the permission to stay, and those two things carry different dates. Almost every problem we are asked to unwind starts with an applicant who read the visa validity and ignored the admission stamp.

Categories divide into three practical families. Tourist and visa-exemption entries cover short leisure travel. Non-Immigrant categories, each identified by a letter code, cover a purpose: B for business and employment, O for family and retirement, ED for study, O-A and O-X for long-stay retirement, and the newer DTV for remote workers and soft-power activities. Above those sit privilege and investment routes such as the LTR visa administered through the Board of Investment and the Thailand Privilege membership programme, which behave less like visas and more like subscriptions with immigration benefits attached.

The letter code decides which extension rules apply once you are inside the country. This matters more than the initial application. A Non-B obtained for a job cannot be extended on retirement grounds without a change of category, and a tourist entry converted late gives an immigration office a discretionary reason to refuse. Choosing the code correctly at the outset is the single highest-value decision in a Thai immigration file.

Category map and where each one breaks down

Note the pattern in the right-hand column. Refusals in Thailand are overwhelmingly evidential rather than substantive. The applicant qualifies; the paperwork does not demonstrate it in the format the reviewing officer is required to tick. That is a solvable problem, and it is the part of the process we own.

The document chain for a file prepared outside Thailand

1. Establish the category first: Confirm the purpose of stay and the extension route you intend to use twelve months from now, not just the entry you need next month.
2. Collect civil documents at source: Birth, marriage, divorce and police records must come from the issuing country. A photocopy certified locally is not the same as a certified extract from the registry.
3. Legalise in the country of origin: Until 28 February 2027 a foreign public document intended for Thai official use is endorsed by the Thai embassy or consulate in that country. An apostille alone is not yet operative for Thailand.
4. Translate into Thai and certify: The Department of Consular Affairs certifies the translation. Names must match the passport transliteration exactly across every document in the bundle.
5. File and track the admission stamp: On arrival, photograph the stamp and the TM6 record. Diary the permitted-to-stay date, not the visa expiry, and set the extension reminder 30 days before it.

What changes when you are already in Thailand

In-country changes of category are possible but constrained. Immigration offices generally require at least 15 to 21 days of permission remaining before they will consider a change, and some categories cannot be reached from a visa exemption entry at all. Where a change is not available, a short trip to a Thai mission in a neighbouring country is the orthodox route, and the mission's own local practice — not Bangkok's — governs what it will accept.

Annual extensions are granted by the Immigration Bureau, and every extension resets a compliance calendar: the 90-day address report under section 37(5) of the Immigration Act, the re-entry permit if you intend to leave, and for employment cases the work permit cycle that runs in parallel and on different dates. We map those four clocks onto one calendar at the start of the engagement because a lapsed re-entry permit silently cancels an otherwise valid extension the moment the holder boards a flight.

Common mistakes and how we avoid them

More questions we are asked

Can I work remotely for a foreign employer on a tourist entry?

The Working of Aliens legislation is drafted broadly and the safe position is that income-generating activity performed in Thailand needs an appropriate status. The DTV was created precisely to give remote workers a defensible category; we assess eligibility against your employment evidence.

How far ahead should a retirement extension be prepared?

Start at least three months out. The bank-seasoning requirement looks backwards, so a balance topped up the week before filing does not satisfy it.

Does a previous refusal block a new application?

A refusal is a fact in your history, not an automatic bar. What matters is whether the new file answers the reason for refusal on its face; we ask for the refusal notice before advising.

Is a visa run still viable?

Repeated land-border re-entries on exemption attract officer scrutiny and refusals of entry are recorded. If your plan depends on repeated entries, convert to a category that supports the stay you actually need.

Do you handle both the visa and the underlying document legalisation?

Yes. Most of the risk in a Thai immigration file sits in the civil-document chain rather than the visa form, so we prepare both in one workflow.