Starting October 1, 2022 until March 31, 2023, travelers will be allowed to stay for 30 days or 45 days without prior approval of a Thai visa.

During this period, the length of stay per visit will be 45 days for passport holders of the following countries/territories who may enter Thailand under a tourist Visa Exemption scheme: Andorra, Australia, Austria, Bahrain, Belgium, Brunei, Canada, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Indonesia, Ireland, Israel, Italy, Japan, Kuwait, Latvia, Liechtenstein, Lithuania, Luxembourg, Malaysia, Maldives, Mauritius, Monaco, The Netherlands, New Zealand, Norway, Oman, The Philippines, Poland, Portugal, Qatar, San Marino, Saudi Arabia, Singapore, Slovak, Slovenia, South Africa, Spain, Sweden, Switzerland, Turkey, the UAE, UK, Ukraine, and the USA.

Also, during this period, the length of stay per visit will be 30 days for passport holders of the following countries/territories who may apply for a VOA: Bhutan, Bulgaria, China, Cyprus, Ethiopia, Fiji, Georgia, India, Kazakhstan, Malta, Mexico, Nauru, Papua New Guinea, Romania, Saudi Arabia, Taiwan, Uzbekistan, and Vanuatu. The visa fee of 2,000 THB will remain the same for these countries.

In addition, passport holders of the following countries/ territories may enter Thailand without a visa under a bilateral agreement: Cambodia (14 days), Myanmar (14 days), Hong Kong (30 days), Lao PDR. (30 days, Macau (30 days), Mongolia (30 days), Russia (30 days and VOA), Vietnam (30 days), Argentina (90 days), Brazil (90 days), Chile (90 days), Korea (ROK) (90 days), and Peru (90 days).

Note: Please make sure that your passport is valid for at least 6 months or check with your airline for the passport validity requirement.

Reference: https://www.thaiembassy.com/weekly-updates/thailand-entry-requirements-for-october-2022