Thailand Board of Investment

The Office of the Board of Investment (BOI) is a government agency under the Ministry of Industry. Its main roles and responsibilities are in promoting investment. The Board of Investment prescribes the investment promotion policies under Investment Promotion Act B.E 2520 and the respective Amendment Acts No.2 B.E 2534, and No.3 B.E 2544.

Click here to read A Guide to the Board of Investment.

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One Start One Stop Investment Center (OSOS)

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.

Click here to learn more about the OSOS.

Policies for Investment Promotion
To relieve the fiscal burden of the government and to respond to current and future economic situations, the BOI prescribes policies for investment promotion as follows:
  • The efficiency and effectiveness of tax privileges given will be enhanced. Privileges will be granted to projects that actually benefit the economy and good governance will be used to manager and supervise the application of tax and duty privileges. Promoted entities will report the operating results of their promoted projects to the BOI for review prior to the application of tax and duty privileges for that year.
  • To promote development of quality and production standards to enhance competitiveness in the world market, every promoted project that has an investment capital of 10 million bath or more (excluding cost of land and working capital) must obtain ISO 9000, ISO 14000 or similar international certification.
  • Previous conditions on exports and use of local materials are repealed so that the criteria for promotion will be in line with international trade and investment agreements.
  • Special investment promotion will be given to regions or areas with low income and inadequate investment facilities. Maximum tax and duty privileges will be given to these regions or areas.
  • Priority is given to small and medium industries by applying a minimum level of investment capital of 500,000 bath (excluding cost of land and working capital) for activities as per the announcement of the BOI no. 1/2553 and of not less than on million baht (excluding cost of land and working capital) for other activities.
  • Priority is given to agricultural activities and agricultural products, projects related to technological and human resource development, public utilities, infrastructure and basic services, environmental protection and conservation and targeted industries.
BOI Zoning
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

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Regions & Countries
Service Areas
Investment Promotion


Bangkok (Thailand)
(+66) 2553 8111
Contact via CGA (Andrea)