Thailand Non-O Visa for Marriage, Family and Dependants

The Non-Immigrant O visa is an umbrella, not one universal "marriage visa". A Thai spouse, Thai child, dependant of a foreign visa holder and retiree may all encounter the O label, but they do not submit the same case.

This guide focuses on family and dependant routes. For age-based stays, use our separate Thailand retirement visa comparison.

Rules checked: 3 September 2026. MFA lists family and several other activities within category O. The exact visa or extension checklist depends on the relationship, main holder, application location and whether the application is overseas or inside Thailand.

The main family routes

Spouse of a Thai citizen

The application normally needs evidence of a legally recognised marriage, the Thai spouse's identity and address, and the couple's real relationship. Overseas visa evidence and an annual extension inside Thailand are separate processes.

People call this a "marriage visa", but the practical route may be a Non-O entry followed by an extension of stay based on the Thai spouse. Check which step you are actually applying for.

Parent of a Thai child

A parent route uses evidence of the legal parent-child relationship, the Thai child's identity and the family circumstances. It is not automatically identical to the spouse route.

If parentage, custody or parental power is legally complicated, use a qualified Thai lawyer. A birth certificate alone does not answer every family-law question.

Dependant of another foreign holder

A spouse or child accompanying a Non-B, ED, SMART, LTR or another main holder may have a dependant route. The main holder's status, relationship and programme conditions control.

DTV dependants use the DTV route, while SMART and LTR operate through their own programme rules.

Overseas application or in-country route

An overseas Non-O application normally starts through Thailand eVisa, using the checklist for the handling mission.

Immigration also publishes purpose-specific checklists for applying for or changing to certain Non-Immigrant statuses inside Thailand. TM.86 is used in published checklists for a person changing from a Tourist or Transit visa; TM.87 is used for specified people who entered without a visa and seek a Non-Immigrant visa.

That does not mean every visitor can convert. The purpose, current status, remaining stay and evidence all matter. Read our change-of-status guide and ask the responsible office before committing to the plan.

Financial evidence

Family-based visa and extension routes can require financial evidence, but the amount, method and seasoning rules are not universal across every family case.

Use the current checklist for the exact application. Pay attention to:

whether the evidence is income, a bank balance or another permitted method
whose name the account must be in
how long funds must be held
when the bank letter and statement must be issued
whether overseas income evidence needs certification

A screenshot of a balance is not automatically the document Immigration wants.

Relationship evidence

The core documents can include marriage, birth, adoption, custody, household-registration and identity records. Foreign documents may need legalisation and Thai translation.

Officers may ask for evidence that the relationship and shared life are genuine. Requirements vary by route and office. Obtain the local list rather than copying a friend's bundle and hoping your missing pages are unimportant.

Can you work?

Do not assume a Non-O automatically permits work. Some Non-O holders may be able to obtain work permission under an eligible basis, while retirement-based permissions prohibit work.

If employment is part of the plan, check the work permit guide with the employer and Department of Employment before starting.

Extensions and under-consideration periods

A family extension is a separate Immigration decision. Some applications receive an under-consideration stamp while checks are completed. Follow the date on that stamp and return when instructed.

Read our extension guide and use the current local checklist. Bank letters, photographs, maps, witnesses and home visits can be office or case specific.

Reporting and travel

If you remain in Thailand long term, 90-day reporting may apply. If you leave while relying on a current extension, obtain a re-entry permit when required or the permission may end on departure.

Common mistakes

Treating every Non-O case as the same visa.
Using retirement financial rules for a spouse application, or vice versa.
Assuming an overseas visa guarantees an annual extension.
Letting the current permission run too low before asking about a status change.
Starting work without confirming work authorisation.
Leaving Thailand without checking re-entry requirements.

Official sources

Use the checklist for the exact relationship and office. A family connection can create a route, but it does not make the evidence interchangeable.