| | 21.05.1973 | Economic Planning Unit (EPU) was established under the State Secretariat (SS)
| |
| | 01.01.1976 | Economic Development Board (EDB) was established under the SS | |
| | 01.01.1993 | The transfer of Computer Section of EPU to Technology and Information Section of Ministry of Finance | |
| | 14.03.1993 | Insurance Section of EDB was transferred to Financial Institution Division, Ministry of Finance | |
| | 07.03.1995 | Tourism Section of EDB was transferred to Ministry of Industry and Primary Resources | |
| | 31.03.1995 | Transfer of some EDB officials to Development Bank of Brunei | |
| | 15.06.1996 | Weight and Measures Section of Ministry of Home Affairs was transferred to EPU | |
| | 01.01.1997 | EPU and EDB were merged together as Department of Economic Planning and Development (DEPD), Ministry Of Finance | |
| | 01.03.2001 | Department of Economic Planning and Development, Ministry of Finance and Brunei Darussalam Economic Council (BDEC) Secretariat merged together as Department of Economic Planning and Development, under the Prime Minister's Office | |
