Thailand Non-Immigrant ('B' / Business) Visa Information
This visa type is for foreigners working or doing business in Thailand and is best gotten in the country of your origin. You may get a sinlgle entry, which allows you to stay in the Kingdom of Thailand for upto 90 days, at which point you must leave or get an extension of stay from immigration. You can also get a multiple entry business visa for Thailand, which allows you to stay in the kingdom for upto 90 days, at which point you must leave the country before you are permitted to enter for another 90 days (cross the border to stamp out and then back in). A multiple entry visa is valid for 1 year, but you can use this 5 times, allowing you to stay for upto 450 days on one visa.