Changing visa type inside Thailand

Conversion at immigration versus the border run

A conversion, filed on form TM86 (for holders of a visa) or TM87 (for visa-exempt entrants), changes your status at the immigration office: you walk in as a tourist and, some weeks later, hold a 90-day non-immigrant stay on which the real application, a one-year extension of stay, is then built at the same office without your feet ever leaving the country. A border run, by contrast, changes nothing except your entry date: you leave, obtain a visa at an embassy or re-enter exempt, and start again. Runs are the right tool only when you need a visa that cannot be issued in-country, or when your current status is unsuitable for conversion and too short to extend usefully. As a way of extending life in Thailand indefinitely they are increasingly scrutinised, and repeated exempt entries invite refusal at the discretion of the border officer.

What can be changed in-country

• Tourist or visa-exempt entry to Non-O, on the basis of retirement (age 50 plus with the standard funds), Thai marriage, or guardianship of a Thai child or a child studying in Thailand.
• Tourist or visa-exempt entry to Non-B, with a sponsoring employer whose capital, staffing ratio and documents support it, feeding a work permit application.
• Tourist entry to Non-ED for study at an approved institution, an avenue immigration now examines closely for substance.
• Between non-immigrant bases at extension time in many cases, for example a Non-B holder retiring onto a retirement extension, which is a change of extension basis rather than a formal conversion.
• Onto the LTR: qualification is endorsed through the Board of Investment, and holders of most current statuses can complete the change in-country once endorsed.

The notable absences: the DTV cannot be obtained or converted to inside Thailand, embassies only. The O-A is by definition a home-country application. Privilege memberships can generally be activated in-country from eligible statuses, handled by the programme itself.

The timing windows

Conversion applications require remaining permitted stay at filing, commonly at least 15 days and at some offices 21 or more; arrive with less and the application is refused before it is read. Since gathering documents, especially anything from abroad or from a bank, takes longer than expected, the practical rule is to start the moment you know a conversion is intended, and to use a 30-day extension of the current stay to buy room if the file is not ready. Processing to the 90-day non-immigrant stamp typically involves an initial review and a return visit some weeks later; the subsequent one-year extension has its own evidence and, for retirement, its own seasoning clock, which should be running in parallel, not started afterwards.

Conversion is discretionary, and the file is read as a whole: entry history, prior overstays, the credibility of the stated basis. A technically eligible application on a messy passport can still fail. The remedy is preparation, not persistence.

The documents that decide it

Conversions succeed or fail on the evidence of the claimed basis, and the standard is higher than most applicants expect. Retirement conversions want the bank book, a same-day balance letter and the deposit's provenance; marriage conversions want the registration, photographs and often a home visit; Non-B conversions want the company's registration papers, shareholder list, financials, office photographs and a coherent explanation of why this foreigner, in this role. The address side must also hold: an immigration office will match your stated residence against the TM30 record before it processes anything. Assembling this in parallel with the timing window, rather than sequentially, is what makes in-country conversion comfortable instead of frantic.

When the embassy is the better route

An embassy application beats an in-country conversion when the visa only exists abroad (DTV, O-A), when your remaining stay is too short and an extension will not save it, when your entry history makes a fresh, clean visa preferable to a discretionary conversion, or when you are outside Thailand anyway and can simply arrive with the right status, which is always the tidiest outcome. Post selection matters: requirements and temperament vary between embassies more than official guidance admits, and the difference between a smooth issue and a refusal is often the choice of window. Sequencing these moves, choosing conversion or embassy, picking the post, and having the file complete before any clock starts, is precisely the work this office does for clients before they ever stand in a queue, and quite often so that they never do.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.