Once you settle on the island, Koh Samui Immigration in Maenam becomes a regular fixture: it is where you file your 90-day report, renew your annual extension of stay, sort re-entry permits before you travel, and pick up the certificate of residence you need for a driving licence or a car. Here is the expat guide - what the office handles, where it is, how each errand works, and how to keep the whole thing low-stress.
For anyone living on Koh Samui on a long-stay visa - retirement, marriage, the DTV, the LTR, work or family - immigration is not a one-off tourist formality but a recurring part of island life. Koh Samui Immigration handles the 90-day address report every long-stay resident owes, the renewable one-year extension of stay that keeps you here, the TM30 address notification your landlord must file, the re-entry permit that protects your extension when you travel, and the certificate of residence that unlocks a driving licence, a car purchase or a bank account. This guide covers what the office does, where to find it in Maenam, how each errand works and what to bring, the four ways to file your 90-day report, why the TM30 matters so much, and how to stay well clear of overstay - so a trip to immigration stays a routine errand rather than a source of stress.
If you stay in Thailand on a long-stay extension (retirement, marriage, DTV, LTR, education or work), you must report your current address to immigration every 90 days. Koh Samui Immigration in Maenam is where island residents file this, and it is separate from your visa extension - it does not extend your stay, it simply confirms where you live. You can report in person at the Samui office, by registered post, online through the immigration website or app, or through an agent. Missing it carries a fine, so most residents diarise the due date printed on the slip you receive each time.
The one-year 'extension of stay' - the renewable permission that turns a retirement, marriage, work or family visa into a real long stay - is processed at the Koh Samui Immigration office for anyone whose registered address is on the island. You bring the financial evidence (the seasoned bank balance or income for retirement/marriage), your TM30 receipt, passport, photos and the completed TM7 form. Requirements and the exact document list vary by office and are periodically tightened, so confirm the Samui office's current checklist before your appointment and arrive with more copies than you think you need.
Under Thai law the 'house master' - your landlord, villa owner, condo juristic office or hotel - must notify immigration that a foreigner is staying at their address, normally within 24 hours of you moving in or returning from abroad. The resulting TM30 receipt is quietly one of the most important documents you own on Samui: immigration usually wants to see it before processing a 90-day report, an extension or a certificate of residence. Make sure your landlord or building office files it, and keep a copy - a missing TM30 is the single most common reason a Samui immigration errand gets bounced.
A long-stay extension is cancelled the moment you leave Thailand unless you first buy a re-entry permit - single-use or multiple-entry. You can get one at Koh Samui Immigration in advance, or at Samui Airport before departure, but sorting it at the calm Maenam office beforehand is far less stressful than the queue at the airport on the day. Anyone on a retirement, marriage or other one-year extension who travels - even for a weekend in a neighbouring country - needs this, or they forfeit the extension and have to start the process again.
Koh Samui's immigration office sits in the Maenam sub-district on the island's north coast, between Nathon and Bophut, and it serves the whole island - residents from Chaweng, Lamai, Bophut, Bang Rak, Choeng Mon, Nathon, Maenam and the quiet south-west all use it. Nathon, the west-coast ferry town, has the main district government offices, but immigration matters - 90-day reports, extensions, certificates and TM30 - run through the Maenam office. Because the exact address and hours change over time, confirm the current location before you set off across the island.
Immigration on Samui runs on a queue-ticket system and is busiest first thing in the morning and around high-season and visa-run peaks. Arrive early, dress neatly (immigration is a government office and shorts or beachwear can be turned away), and bring a book - even a simple 90-day report can mean a wait, and the island office is smaller than a city one. Extensions in particular can involve returning for a second visit or a 30-day 'under consideration' stamp, so never leave your errand until the final days before your permission to stay expires.
Whatever your errand, bring your passport, your TM30 receipt, and photocopies of your passport photo page, visa/extension stamp and departure card - signed. Extensions add financial evidence, photos and the relevant application form; certificates of residence add proof of address such as a lease. Requirements differ by errand and change over time, so check the Samui office's current list first. Copy shops are scarcer near the island office than in a city, so copy everything beforehand - losing your queue place to hunt for a photocopier is a classic avoidable mistake.
Samui has an established industry of visa agents who will prepare paperwork, handle the TM30, book appointments and even queue for you - useful if your Thai is limited, your case is complex, or you simply value the time and the drive to Maenam. A standard 90-day report or straightforward extension does not require an agent, and doing it yourself is free beyond the government fee, but many long-stay residents on the island use one for annual extensions to avoid document surprises. Choose a reputable, established agent rather than the cheapest.
You can file your 90-day report in four ways: in person at Koh Samui Immigration in Maenam (take a queue ticket, hand over your passport and TM47 form, collect the receipt slip), by registered post sent 7-15 days before the due date, online via the immigration website or mobile app (available in a window around the due date, though the system can be temperamental), or through an agent. The report is due every 90 days that you remain in Thailand; leaving and re-entering the country resets the clock. Keep the receipt slip - the next due date is printed on it.
Koh Samui Immigration issues a certificate of residence - an official letter confirming your island address - which you need to get a Thai driving licence, buy a car or motorbike, or open some bank accounts. There is usually a small fee and it can take anywhere from same-day to a few days depending on the office's workload, so request it a little ahead of when you need it. Some residents instead obtain a yellow house book and pink ID card, which serve as a reusable proof of address and save repeated drives to the Maenam office.
Overstaying your permitted-to-stay date is fined 500 baht per day up to a 20,000 baht cap, and a longer overstay can trigger a re-entry ban - a serious risk that is entirely avoidable. Watch the permitted-to-stay stamp in your passport rather than the visa validity date, and start any extension well before it expires, since Samui Immigration can require a second visit. If you travel, buy a re-entry permit first. Treat immigration dates as hard deadlines and the whole system stays low-stress.
Make sure your TM30 is filed before you go, bring every document plus photocopies, arrive early with a queue ticket, and dress for a government office. Have your 90-day due date and extension deadline diarised so nothing sneaks up on you. If the process feels opaque, a Thai-speaking friend or a reputable Samui visa agent removes most of the friction. Above all, confirm the office's current requirements, location and hours by phone or online before driving to Maenam - immigration procedures differ by office and are updated periodically.
Koh Samui's immigration office is in the Maenam sub-district on the island's north coast, between Nathon and Bophut, and it serves the whole island - residents from Chaweng, Lamai, Bophut, Bang Rak, Choeng Mon, Nathon and the south-west all use it. Nathon, the west-coast ferry town, has the main district government offices, but immigration errands - 90-day reports, extensions, certificates and TM30 - are handled at the Maenam office. The exact address and opening hours change over time, so confirm the current location before you drive across the island.
If you live in Thailand on a long-stay extension, you must report your address to immigration every 90 days. On Samui you can do this in person at the Maenam immigration office, by registered post 7-15 days before the due date, online via the immigration website or app, or through an agent. It is separate from your visa and does not extend your stay - it just confirms where you live. Keep the receipt slip you are given, as the next due date is printed on it, and note that leaving and re-entering Thailand resets the 90-day clock.
The TM30 is the address notification that your 'house master' - landlord, villa owner, condo juristic office or hotel - must file with immigration when a foreigner stays at their address, normally within 24 hours of moving in or returning from abroad. The TM30 receipt is one of the most important documents you hold: Koh Samui Immigration usually wants to see it before processing a 90-day report, an extension or a certificate of residence. Make sure your landlord or the building's office files it, and keep a copy - a missing TM30 is the most common reason an island immigration errand is bounced.
Yes. The renewable one-year extension of stay for retirement, marriage, work or family is processed at the Koh Samui Immigration office in Maenam for anyone whose registered address is on the island. You bring the financial evidence (a seasoned bank balance or income for retirement and marriage cases), your TM30 receipt, passport, photos and the application form. Requirements vary by office and are periodically tightened, so confirm the Samui office's current checklist first, bring extra copies, and start well before your permission to stay expires, as a second visit may be required.
Yes, if you are on a one-year extension of stay. Leaving Thailand cancels that extension unless you first buy a re-entry permit - single-use or multiple-entry. You can get one in advance at Koh Samui Immigration in Maenam or at Samui Airport before departure, but sorting it at the island office beforehand is far less stressful than the airport queue. Without a re-entry permit, even a weekend trip abroad forfeits your extension and forces you to start the process over.
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Hero photo by Anetta Kolesnikova on Pexels. General information only, not legal or immigration advice; Thai immigration requirements, fees, office locations and procedures change and differ by office - confirm current details with the Koh Samui Immigration office and official sources.