Family visas and extensions in Thailand

The Non-Immigrant O category on the ground of marriage. It is normally obtained as a 90-day entry and then converted at immigration into a one-year extension of stay, renewed annually while the marriage subsists and the financial test is met.

Immigration accepts either a seasoned Thai bank balance held in the applicant's own name or a monthly income shown through a documented, verifiable source. The amounts and the seasoning period are set by immigration order and are checked at each renewal, so the money must be in place well before the application, not on the day.

Only after it is translated and legalised. A marriage registered abroad must be translated into Thai, certified, and legalised through the Thai Ministry of Foreign Affairs before a Thai office will accept it — an apostille alone is not enough for Thailand because Thailand is not an Apostille Convention member for inbound use in every scenario. We handle the full chain.

Yes. A foreign parent supporting a Thai minor child can extend stay on that basis, with the child's birth registration, house registration and evidence of genuine support and contact. Proof of an ongoing parental relationship matters as much as the paperwork.

A dependent parent of a Thai national can be sponsored on family grounds. A parent of a foreign resident is harder and usually runs through a retirement-type category instead, so the right answer depends on whose nationality anchors the family.

An extension of stay dies the moment you leave Thailand unless you hold a valid re-entry permit. Single and multiple versions are issued at immigration or at the airport before departure. Losing an extension to a forgotten re-entry permit is the single most common and most expensive family-visa mistake.

For marriage extensions, yes. Immigration commonly requests photographs of the couple at the registered address, a sketch map, and sometimes an in-person visit or an interview with both spouses. Prepare for it rather than treating it as a sign of suspicion.

Document legalisation typically runs a few working days once the source documents are in hand, and the extension itself is usually granted under consideration for thirty days before final approval. Plan six to eight weeks end to end if foreign documents need legalising.