Thailand Dependent Visa: Bringing Family to Thailand on a Non-O

If you hold a long-stay visa in Thailand — a Non-Immigrant B work visa, a retirement visa, or a similar status — and your spouse or children are still outside the country, there is a well-established legal route to bring them with you. Thailand issues a dependent Non-Immigrant O visa for family members accompanying foreign nationals who are lawfully resident here. This guide explains who qualifies, how the application works, what documents you will need, and what rights the visa does and does not provide.

Who qualifies for the Thai dependent visa

The Thai dependent visa falls under the Non-Immigrant O (Other) category. It is granted on the basis of the applicant’s family relationship to a primary visa holder — another foreign national who is already lawfully resident in Thailand — rather than a relationship to a Thai citizen.

The following family members are generally eligible:

• Spouses of a foreign national holding a valid Non-Immigrant B visa with a work permit, a retirement Non-O, or another qualifying long-stay status
• Children under 20 years old of the primary visa holder
• Parents of the primary visa holder, in some circumstances — though this category is not uniformly approved and should be confirmed with the relevant Thai consulate or immigration office before applying

The primary visa holder must hold a substantive status: a Non-Immigrant B (work), Non-Immigrant O (retirement or family), Long-Term Resident (LTR), or in some cases an education visa. The primary holder’s status acts as the legal anchor for every dependent — if it lapses or is revoked, the dependent’s permission to remain is also affected.

This visa category is distinct from the Non-O marriage visa, which covers foreign nationals who are married to Thai citizens. The dependent visa discussed here is specifically for foreign families accompanying another foreign national already resident in Thailand.

How to obtain the initial Non-O visa

In most cases, dependents apply for an initial Non-Immigrant O visa at a Thai embassy or consulate in their country of residence before travelling to Thailand. This initial visa is typically granted for 90 days, allowing the dependent to enter the country.

Once in Thailand, the dependent applies for an extension of stay at the local immigration office before the 90 days expire. A successful extension converts the initial entry into a one-year permission to remain, tied to the primary visa holder’s ongoing status. This annual extension can be renewed each year for as long as the primary holder’s visa remains valid.

If a dependent is already present in Thailand on a tourist visa or visa exemption, it may in some cases be possible to change status or extend from within the country at the immigration office. This depends on individual circumstances and officer discretion; it should be confirmed in advance rather than assumed.

Documents required for the application

The exact document checklist varies between Thai embassies and immigration offices, but the following are consistently required:

For a spouse:

• Valid passport (at least six months remaining validity is recommended)
• Original marriage certificate with an apostille or appropriate legalisation for the issuing country
• Certified translation if the document is not in Thai or English
• Passport-sized photographs
• Evidence of the primary visa holder’s current status in Thailand (copy of their visa, work permit, and/or permission to stay)
• Completed application form

For children under 20:

• Child’s valid passport
• Original birth certificate, apostilled or legalised
• Certified translation if not in Thai or English
• Additional documents may be requested if the child’s nationality differs from a parent’s

Bring both originals and clear photocopies to every appointment. For UK nationals, the standard route for legalising documents intended for overseas use is through the Foreign, Commonwealth and Development Office (FCDO) apostille service.

Rights, restrictions, and routine compliance

The dependent Non-Immigrant O visa does not include the right to work. A dependent who wishes to take up paid employment in Thailand must apply separately for a Non-Immigrant B visa and obtain a work permit in their own name. Attending school or university as a student is generally permitted on this status.

All dependents in Thailand are subject to the same routine compliance obligations as any long-stay foreign national:

• 90-day reporting (TM47): You must report your continued presence to the local immigration office every 90 days. This can be done in person, by post, or — in some areas — online through the immigration bureau portal.
• TM30: The landlord or host at each address where you stay is required to file a TM30 notification with immigration within 24 hours of your arrival. If you move, a new TM30 must be filed promptly.
• Re-entry permits: If you travel outside Thailand while holding an extension of stay, you must obtain a re-entry permit — single or multiple — before you depart. Leaving without one cancels the extension, and you would need to reapply from outside Thailand.

If the primary visa holder’s circumstances change

Because the dependent’s status is anchored to the primary holder’s, any significant change in the primary holder’s situation can affect the whole family. A job change, the cancellation of a work permit, a change of employer, or a switch to a different visa category can all have knock-on effects.

If the primary holder’s visa lapses or is cancelled, dependents may need to depart Thailand and reapply from outside the country. Immigration offices do not automatically notify dependents when changes occur to the primary holder’s file, so families need to stay informed and act before status expires.

Planning ahead is important: if a job change or contract end is approaching, assess the impact on dependent family members early and allow enough lead time to arrange the next status before the current one runs out. Acting after expiry is significantly more complicated.

How Gateway Siam can help

At Gateway Siam, we advise UK and Chinese nationals on the full range of Thai visa and immigration requirements, including bringing family members to Thailand under the dependent visa route. If you are planning to bring your spouse or children to join you, or if your circumstances are changing and you need to understand the impact on your family’s status, contact us for a clear and straightforward consultation.

Immigration requirements and processing practices can change. The information in this guide reflects the position as of July 2026. Always confirm current requirements with the relevant Thai embassy or immigration office before applying.