
Visa policy of Thailand

Visitors to Thailand must obtain a visa from one of the Thai diplomatic missions unless they come from a visa-exempt country or a country whose citizens are eligible to obtain visas on arrival.
Thailand currently offers visa-free travel to nationals of 64 countries and territories. The Thai government maintains bilateral agreements on visa waivers with some of these countries. Nationals of 18 countries can obtain a visa on arrival.
Recent policy changes.
Since May 2014, there was a brief crackdown on visa runs, meaning that if foreigners wish to re-enter Thailand after their visa-free or visa on arrival period has expired they have to obtain a visa in advance, or remain outside Thailand at least for one night. In August 2014, Thailand Prime Minister ordered the Immigration Police to be more flexible as the strict application of the law was affecting schools and the tourist industry. On 31 October 2018 it was announced that within 30 days (by the end of November 2018), overstay visas will no longer be allowed, and there will be no remaining overstayers in the kingdom by that date.
Temporary Covid 19 changes.
Since Jan 2021, all passport countries with exempt entry of 30 days has been extended to 45 days. This has been done to cover the additional entry requirements which involves staying for 15 days in an Alternative State Quarantine. 
Alternative Local State Quarantine (ASLQ) has the same process as ASQ with difference that the ASLQ hotels are located outside of Bangkok.
Visa exemption for normal passports.
90 days (5 nations).
The governments of the following countries have concluded bilateral visa waiver agreements with Thailand. Holders of normal passports from these countries are allowed to travel to Thailand without a visa for 90 days.
30-day waiver (6 passport holder).
Holders of normal passports issued by these countries and regions, which have bilateral agreements on visa waivers with Thailand. are allowed to stay up to 30 days.
1 - for Hong Kong Special Administrative Region Passport only.
30-day exemption (51 nations).
Holders of normal passports of the following countries are granted visa-free travel to Thailand for a period of up to 30 days. The exemption is granted at most twice in a calendar year when entering overland or via a sea border but there is no limitation when entering by air.
1 — Brunei, Indonesian, Malaysian, and Singaporean nationals do not have a limitation on the number of visa exempt entries.<br>
2 — for British citizens and British Nationals (Overseas) only.<br>
Most of the visa-exempt nationalities listed above may apply to extend their stay for another 30 days since 29 August 2014.
14 days (2 nations).
Under bilateral agreements, holders of normal passports of the following 2 countries can stay without a visa for a maximum of 14 days:
Visa exemption for diplomatic or service category passports.
Holders of diplomatic or service category passports issued by the following countries and territories are allowed to visit Thailand without a visa for visits up to 90 days (unless otherwise noted):
D — diplomatic passports only.
Visa on arrival for normal passports.
Nationals from the following countries may apply for a visa on arrival which allows them to stay for up to 15 days at major entry points whether by air or by land. Visa on arrival may not be extended.
There are 48 immigration checkpoints providing visa on arrival, including:
International Airport
Land and harbor checkpoint
eVisa on arrival.
From 21 November 2018 Thailand started issuing tourist visas valid for 15 days in a simplified procedure to visitors from the countries whose citizens are eligible for visa on arrival.
Electronic visa application also became available from February 2019 in some of the consulates of Thailand abroad.
Airports listed at previous chapter with “#” icon accept eVisa on arrival.
Visa required in advance.
Citizens of the following countries can only apply for a Visa in advance in their home country's Thai Embassy. Thai Embassies abroad only accept applications of these countries' citizens if they have a resident permit of the country they want to apply from.
Transit.
Passengers transiting through Suvarnabhumi Airport for less than 12 hours do not require a visa, unless they are travelling on Angkor Air, Beijing Capital Airlines, Cebu Pacific, Eastar Jet, Golden Myanmar Airlines, Indigo, Intira Airlines, Jeju Air, Jet Asia Airways, Jetstar Asia Airways, Jetstar Pacific, Jin Air, Juneyao Airlines, Lao Central Airlines, Tigerair Mandala, Norwegian Air, Orient Thai Airlines, Regent Airways, Shandong Airlines, Sichuan Airlines, South East Asian Airlines, SpiceJet, Spring Airlines, T'way Airlines, Thai Smile, Tigerair or VietJet Air.
Those transiting through Don Mueang International Airport for less than 12 hours do not require a visa only when travelling on Thai AirAsia or Thai AirAsia X.
Citizens of Pakistan are required to obtain a visa when transiting through Thailand at all times.
APEC Business Travel Card.
Holders of passports issued by the following countries who possess an APEC Business Travel Card (ABTC) containing "THA" on the back of the card can enter visa-free for business trips for up to 90 days.
ABTCs are issued to nationals of:
Mandatory yellow fever vaccination.
Nationals of the following countries or nationals arriving from the following countries require an International Certificate of Vaccination in order to enter Thailand, unless they produce evidence that they do not reside in the following areas. Failure to fulfill this requirement could result in refusal of entry into Thailand.
Statistics.
Most visitors arriving to Thailand on short term basis were from the following countries of nationality:
Work permit.
To legally work in Thailand, a foreigner must apply for a work permit. Work permit is a legal document that states a foreigner's position, current occupation, or job description and the Thai company he is working with. It also serves as a license to perform a job or an occupation allowed for foreigners inside Thailand.
A foreigner is eligible to apply for a work permit as long as he has a non-immigrant visa or a resident visa, has an available employer who will provide documents for work permit, and the occupation he will perform is not prohibited to foreigners.
One Stop Service Centre for Visas and Work Permits.
The One Stop Service Centre for Visas and Work Permits was established on 1 July 1997 by authority of the Regulations of the Office of Prime Minister promulgated on 30 June 1997. The objective of this centre is to simplify visa extension and permit issuance procedures to create a good investment environment. It aims to facilitate applications of visa extension and work permits (e.g., stay permission, re-entry permit, work permit). The Centre is located on Chamchuree Square Building, Floor 18, Phatumwan, Bangkok.