Thailand Visa Extension & 90-Day Reporting

Extension of stay is not a new visa

An extension of stay under section 35 of the Immigration Act extends permission to remain that was granted at entry; it does not create a new visa and it does not permit re-entry. Leaving Thailand without a re-entry permit cancels the extension, which is why the re-entry permit is issued in the same visit rather than treated as an afterthought. The distinction also decides which office is competent: extensions are granted by the Immigration Bureau in Thailand, visas by Royal Thai Embassies abroad.

Each extension category has its own evidentiary test. Employment extensions turn on the employer's standing and the applicant's work permit; retirement extensions on age and either a seasoned deposit or monthly income; marriage extensions on the genuineness of the relationship and, where required, income or deposit evidence; education extensions on attendance records at an accredited institution.

Common categories and their decisive evidence

How the visit itself is prepared

1. Office rule check: Provincial immigration offices apply supplementary local requirements. We confirm the current checklist for the office of jurisdiction rather than working from a national template.
2. Document seasoning: Bank letters and statements are dated within the office's acceptance window, commonly a few days, and printed in the format the office recognises.
3. Address evidence: TM.30 notification by the property owner must be current; a missing TM.30 is a frequent reason an otherwise complete file is refused at the counter.
4. Photographs and site verification: For marriage and employment categories the officer may require dated photographs of the residence or workplace, and in some cases a visit.
5. Under-consideration stamp: Many offices grant a thirty-day consideration period before final approval; the applicant must return on the stated date.

Compliance duties that continue after approval

• 90-day address reporting, counted from the last entry or last report
• TM.30 notification each time the residence changes, including hotel stays in some offices' practice
• Re-entry permit before any departure, single or multiple
• Notification of any change in employment, marital status or study enrolment underlying the category

Common mistakes and how we avoid them

More questions we are asked

How long before expiry can I file?

Commonly within the final thirty to forty-five days, depending on the office and category.

Does an extension allow me to travel?

Not on its own. Departure without a re-entry permit cancels it, and a new visa would then be required.

Can I switch category without leaving Thailand?

In several situations yes, subject to remaining permitted stay and eligibility, but the change must be filed before the current permission expires.

What is the under-consideration stamp?

A temporary permission, usually thirty days, during which the office completes verification before granting the full year.

Is health insurance required?

It is a condition of certain categories, notably some long-stay routes; the requirement is category-specific rather than general.

What happens if I overstay?

Fines accrue daily and longer overstays carry re-entry bans. The lawful route is to file before expiry or depart before it.