Thailand Visa Extension in Koh Samui (2026): Immigration Office Guide
Need more time on the island? Visa-exempt and tourist stays can be extended once by up to 30 days at the Koh Samui immigration office in Maenam, for 1,900 THB. Here is what to bring, when to go and what else the office handles.
Short on time or documents? Ask a visa specialist.
Koh Samui immigration office: address and hours
The office moved from Nathon years ago, and many older guides still send people to the wrong place. Use the full Maenam address in your map app. It closes on weekends and Thai public holidays.
The checkpoint at Samui Airport only handles arrivals and departures, not extensions. Appointments can be booked through the Immigration Bureau's online booking under "Suratthani Immigration (Samui)", and arriving early is still wise in high season.
Who can extend, and for how long
| You entered on | Extension | Fee |
|---|---|---|
| Visa exemption (30 days) | Once, up to 30 days | 1,900 THB |
| Tourist visa (60 days) | Once, up to 30 days | 1,900 THB |
| DTV (180 days) | Once per entry, up to 180 days | 1,900 THB |
| Non-O retirement or marriage | One year, renewable | 1,900 THB |
Apply before your permitted stay ends. If you have already overstayed, the office collects a fine of 500 THB a day, up to 20,000 THB, and an extension is no longer possible.
What to bring for a 30-day extension
- Passport, plus copies of the photo page, visa or entry stamp
- Form TM.7, filled in (available at the office)
- One 4 x 6 cm photo
- 1,900 THB in cash
- Proof of where you are staying: hotel booking or rental contract
- Your TDAC confirmation and onward ticket, in case they are asked for
Sign every copy. If you rent a private villa, make sure your landlord has filed a TM30 address report for you, as officers often check it.
Other services at Koh Samui immigration
90-day reports
For anyone on a long-stay visa. Due every 90 days; first report in person, then online. 2,000 THB fine if late.
Re-entry permits
Buy one before leaving Thailand on an extension, or it is cancelled: 1,000 THB single, 3,800 THB multiple.
Retirement and marriage extensions
One-year renewals with bank letters and proof of address. Retirement visa guide
TM30 address reports
Filed by your landlord or hotel when you arrive at a new address.
Tips that save a second trip
- Go early in the morning and avoid the days after Thai public holidays.
- Do not leave it to your last day: if a document is missing, you need time to come back.
- If you are on Koh Phangan or Koh Tao, check the ferry forecast first. Boats are often disrupted from October to December.
- Dress respectfully: shoulders and knees covered.
- Applying on a long-stay visa for the first time? Have your file checked before you go.
Get your visa sorted by a licensed specialist
We work with a licensed visa agency in Bangkok with French, English and Thai-speaking specialists. Tell us where you are and what you need: a specialist checks your situation and comes back with the right visa and a fixed quote before you commit to anything.
- Thailand Privilege, DTV, retirement, marriage and extensions
- Paperwork checked before it reaches the embassy or immigration
- Help in English or French, by email or WhatsApp
- Free first assessment, no obligation
Koh Samui visa extension FAQ
How much is a visa extension in Koh Samui?
1,900 THB, paid in cash at the immigration office in Maenam.
Can I extend the 30-day visa exemption on Koh Samui?
Yes, once, by up to 30 days. That gives you up to 60 days in total from your arrival.
Where is the Koh Samui immigration office?
In Maenam, at 333 Maenam Road, Soi 1, not in Nathon. It is open Monday to Friday from 8:30 to 16:30.
Is the Koh Samui immigration office open on Saturdays?
No. It is closed on weekends and Thai public holidays.
Can I extend more than once?
Not on a visa exemption or tourist visa. For a longer stay you need a long-stay visa such as the DTV, a retirement visa or Thailand Privilege.
Official sources we checked
Rules change often. These are the official pages to confirm before you apply.
Related guides
InsideSamui may receive a referral fee from its visa partner if you use their services after contacting us, at no extra cost to you. This page is general information based on official Thai sources and was checked in November 2026. Visa rules change often and decisions are made by Thai embassies and immigration officers, so confirm current requirements before you apply.
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