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On November 23, 2009, the One Start One Stop Investment Center (OSOS) opened for business. The OSOS, which operates as part of the Board of Investment, consolidates staff from numerous investment-related agencies at a permanent location on the 18th Floor of the Chamchuri Square Building on Rama 4/Phayathai Road in Bangkok’s Central Business District.
For businessmen — Thai or foreign; big or small; BOI-promoted or not — interested in investing in Thailand, the One Start One Stop Investment Center offers investors a wide range of investment-related services.
|Zone 1||Bangkok, Nakhon Pathom, Nonthaburi, Pathoum Thani, Samut Prakan, and Samut Sakhon|
|Zone 2||Ang Thong, Ayutthaya, Chachoengsao, Chon Buri, Kanchanaburi, Nakorn Nayok, Ratchaburi, Samut Songkhram, Saraburi, Supanburi, Phuket and Rayong|
|Zone 3||The remaining 58 provinces with low income and with less-developed infrastructure, which are designated as Investment Promotion Zones. 36 Provinces: Krabi, Kamphaeng Phet, Khon Kaen, Chanthaburi, Chai Nat, Chumphon, Chiang Rai, Chiang Mai, Trang, Trat, Tak, Nakhon Ratchsima, Nakhon Si Thammarat, Nakhon Sawan, Prachuab Khiri Khan, Prachin Buri, Phangnga, Phattalug, Pichit, Phitsanulok, Phetchaburi, Phetchabun, Mukdahan, Mae Hong Son, Ranong, Lop Buri, Lamphang, Lamphun, Loei, Songkhla, Sa Kaew, Sing Buri, Sukhothai, Surat Thani, Uttaradit, and Uthai Thani 22 Provinces: Kalasin, Nakhon Phanom, Narathiwat, Nan, Buri Ram, Pattani, Phayao, Phrae, Maha Sarakham, Yasothon, Yala, Roi Et, Si Sa Ket, Sakhon Nakhon, Satun, Nong Bua Lamphu, Chaiyaphum, Nong Khai, Ubon Ratchatani, Udon Thani and Amnatcharoen|