Koh Samui Immigration Office

Samui Immigration is a unit of Surat Thani Provincial Immigration, whose headquarters is on the mainland near Surat Thani town. Its building on Maenam Road Soi 1 opened on 18 August 2018, according to the provincial office's history page, and it's the island's office for every visa service. The address is the one on Surat Thani Immigration's contact page and on the e-Extension list.

Google's listing shows a free parking lot, a paid one, and a wheelchair-accessible entrance.

Immigration Division 6, which covers the south, has listed an online booking calendar for the Samui office, but the link returns an error, while the mainland Surat Thani office's calendar works and offers a tourism slot. Surat Thani Immigration's website also links its own app, SIMM HUB, whose store listing describes Fast Lane queue booking without saying which offices take it. I'd plan on walking in and taking a number.

The nearest thing to a booking is e-Extension, which decides your tourist extension online and leaves you one visit to collect the stamp.

A visa exemption stamp or a 60-day tourist visa can be extended once, by up to 30 days, for ฿1,900, at the officer's discretion. On Samui that happens at the Mae Nam office. The 30 days are added from the end of your current stamp, not from the day you apply, so going a week early costs you nothing.

The Immigration Bureau's handbook for a tourism extension, which Surat Thani Immigration publishes on its own website, lists your passport and one copy, a TM.7 with a photo attached, a form acknowledging the penalties for overstaying, and the fee. Visa services on the island also advise copies of your other passport pages and proof of where you're staying.

A re-entry permit keeps an extension or a long-stay permission valid while you leave Thailand and come back. It costs ฿1,000 for a single re-entry or ฿3,800 for multiple re-entries, and the fee isn't refunded if the application is refused. You need a TM.8 with one 4×6 cm photo and your passport, and you apply at the office where you live, which on Samui means Mae Nam. I'd get one there before the day you fly rather than count on a counter at the airport.

TM.30 is the notice that whoever houses a foreigner files with immigration within 24 hours of the guest moving in. A hotel files it for you. In a villa, condo or house rental the owner is responsible, either in person at Mae Nam, by registered post, or online through the Immigration Bureau's TM.30 system, which Surat Thani Immigration's website links. Ask your landlord for the receipt and keep a copy with your passport papers.

Residents report that the Mae Nam office also issues the residence certificate, the letter that confirms your address for a Thai driver's license or a bank.

Long-stay extensions for Samui residents are handled at Mae Nam, where the local guide describes a separate queue for long-term matters at reception. If your application is accepted for consideration, Surat Thani Immigration's online status check tracks it with your passport number and the receipt number. The requirements for each visa are on my visa requirements guide, and DTV holders, whose 180 days per entry can be extended once, should call 077 423 440 before going.

Koh Phangan has had its own immigration office since 20 May 2021, at 13/47 Moo 2, phone 077 377 947, so Phangan residents don't cross to Samui for the tourist extension. Phangan guides place it in the police station grounds outside Thong Sala, about 1.5 km inland from the pier. Its Google listing gives the same weekday hours as Samui's, and e-Extension lists it as a place to collect the stamp. The guides say it handles tourist extensions and 90-day reports, and that long-stay extensions went to Samui in 2021, so call before going for anything else. The guides add that the office enforces a dress code and has sent people in tank tops away to change. A coworking space there also listed an STM.2 acknowledgement form and the TM.30 receipt among the papers it asks for.

Koh Tao got its own immigration office on 12 July 2021, on the 2nd floor of the district office building in Moo 3, phone 077 456 947. Surat Thani Immigration doesn't publish its hours or services, but a Koh Tao travel agency reports that tourist extensions and 90-day reports are done there, so call first. Koh Tao isn't on the e-Extension list, and VFS lets a tourism applicant collect the stamp at a different office from the one where they applied, so an online application from Koh Tao means a trip to Phangan or Samui for the stamp.

The office works Monday to Friday only, opening at 08:30, closing for lunch from 12:00 to 13:00 and stopping at 16:30. It closes on weekends and Thai public holidays, and I'd avoid the first working day after a long weekend.

A local guide advises arriving early, or just before the lunch break ends, because anyone arriving after about 10:00 risks being asked to come back after lunch. I'd be on Soi 1 before 08:30 and never leave an extension to the last working day before a holiday.

The office moved from Nathon to its building in Mae Nam on 18 August 2018, and some pages give the year as 2016. Any page, map pin or directory sending you to Nathon or Ang Thong for an extension is out of date, and so is one listing a district office address in Mae Nam or a phone number other than 077 423 440. Surat Thani Immigration's contact page lists no office in Nathon today.

Pages written before 15 September 2026 describe extending a 60-day exemption, and the exemption is now 30 days. Checklists that ask for a copy of your departure card date from before the TDAC replaced the paper card. Older Phangan and Koh Tao advice to take the ferry to Samui for every visa matter dates from before those islands' offices opened in 2021.