One-year multiple entry non-immigrant B (business) visa is a visa issued to foreigners interested in pursuing business opportunities or looking to invest in a company, business or a condominium in Thailand.
Approval of this visa largely depends on the purpose of the application and once issued (at a Thai embassy abroad), it needs to be used within one year. However, it requires the visa holders to exit and re-enter Thailand every 90 days by air, sea or land travel.
Please be aware that a one-year multiple entry non-immigrant B visa is valid for a period of 12 months. Each entry is valid for 90 days. After each entry you are required to leave the country via any border checkpoint to secure another 90-day entry stamp. This is simply a stamp, no visits to a Thai consulate nor any fees are required. A short bus trip to Cambodia is the easiest route, but any border checkpoint will be fine.
Note: The professional fee is for the sponsorship and required documents only. You are responsible for the government fees at the Thai consulate (approx. 5,000 THB).