Extending a visa in Thailand: timelines, documents, and penalties
An extension in Thailand is a separate filing, not an automatic continuation of your entry. You do it at immigration before the current stay ends. Even one day late is overstay, and the options get narrower from there.
When to apply
Do not leave it until the last day. In peak season immigration queues take hours, and a file can be sent back for extras. For most tourist extensions, arriving 7–14 days before expiry is realistic if your visa type allows it.
What to bring
- Passport, plus copies of the photo page and the current stamp or visa
- Form TM.7 and a photo of the required size
- Proof of address in Thailand (often TM.30 from the hotel or landlord)
- The extension fee receipt
- Extra papers for your category: funds, an invitation, or a letter from a school or company
The pack depends on the category. A tourist extension is shorter than retirement, education, or business. Do not copy a checklist from a chat: offices in Bangkok, Phuket, and Chiang Mai may ask for different annexes on the same visa type.
If you overstay
Overstay is counted in days. The fine is only part of it: you may face an entry ban, loss of the right to extend, and trouble on the next stamp. The longer the overstay, the less likely it is that you can fix it without leaving.
If the date has already passed, do not buy a random ticket or ignore the status. You need to know whether immigration can regularize the stay or whether you must exit. Trying to “stay a little longer” usually makes the record worse.
If you plan to remain for months, count the whole chain — how many extensions are available, whether you must leave, and whether a different visa category is cheaper than repairing an overstay.
