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Where to invest
Thailand Board of Investment (BOI) Zoning
Since decentralization is a major theme in the BOI incentive scheme, Thailand has been divided into three zones based on economic factors (with earnings and infrastructure as criteria for each province.)
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 59 provinces, with lower income and less-developed infrastructure, are designated as Investment Promotion Zones.