Who needs a visa
Citizens of most European countries, the UK, the US, Canada, Australia and New Zealand can enter Thailand visa-free for up to 60 days, with a possible extension of 30 days at an immigration office.
Nationals of around 90 other countries can apply for a 60-day tourist visa (TR) online before travel. Check the Thai e-Visa site for your passport — rules change, and airlines do enforce them.
At the border
You need a passport valid for six months, proof of onward travel, and an address in Thailand (your first hotel is fine). Immigration may ask for proof of funds.
The Thailand Digital Arrival Card (TDAC) must be completed online within three days of arrival. It is free; any site charging for it is not official.
Extensions and overstays
A 30-day extension costs THB 1,900 at any immigration office and takes an afternoon. Overstaying is THB 500 per day and can result in a ban.
If you are staying longer than 60 days, plan the extension into the trip rather than doing it in a panic on the last day.
