Before the establishment of the Bank of Tanzania, the country was part of the East African Currency Board, which administered the East African Shilling. This arrangement meant Tanzania lacked independent monetary policy until 1967. The Currency Board system operated as a passive institution that simply issued currency backed by foreign reserves, limiting the country's ability to respond to domestic economic conditions or pursue independent development objectives.

The Bank of Tanzania was chartered through the Bank of Tanzania Act of 1965 following the dissolution of the East African Currency Board. The bank commenced operations on June 14, 1966, inaugurated by President Mwalimu Julius Kambarage Nyerere. This marked the beginning of Tanzania's independent monetary policy and the country's ability to use monetary instruments to support national development goals.

Following the Arusha Declaration in 1967, the Bank of Tanzania's role evolved significantly within a socialist economic framework. However, this period was characterized by severe fiscal dominance, where the central bank faced political pressure to finance government deficits through money printing.

• Chronic high inflation exceeding 20-30% in some years during the 1970s-1980s
• Economic instability and severe erosion of purchasing power
• Loss of central bank independence in monetary policy formulation
• Undermined credibility of monetary authorities both domestically and internationally
• Foreign exchange shortages and parallel market premiums

Key Institutional Developments:

• The Annual Credit and Finance Plan (1971) granted the bank control over interest rates
• The Foreign Exchange Plan gave control over foreign exchange allocation and use
• The 1978 Bank of Tanzania Act amendment increased the bank's authority in financial planning

The mid-1980s to 1990s witnessed significant economic reforms as Tanzania moved away from socialist policies toward market-oriented approaches:

• Rapid inflation and severe currency devaluation, highlighting the urgent need for focused monetary policy
• Structural adjustment programs initiated with IMF and World Bank support
• Liberalization of the economy in the early 1990s, which removed exchange controls and opened doors to foreign banks
• Accelerated use of foreign currency in the domestic economy (dollarization pressures)
• Banking sector reforms allowing private sector participation

These reforms laid the groundwork for the fundamental transformation that would come in 1995.

The Bank of Tanzania Act of 1995 fundamentally transformed the central bank's mandate and represents the most important institutional reform in Tanzania's monetary policy history.

This reform marked Tanzania's commitment to modern central banking principles, emphasizing price stability as the primary goal while supporting overall economic development. The success of this framework is evident in the subsequent decline in inflation from double-digit levels in the 1990s to the current 3-4% range.

On January 19, 2024, the Bank of Tanzania made a historic shift from quantity-based monetary targeting (reserve money) to an interest rate-based monetary policy framework. This transition represents the latest evolution in Tanzania's monetary policy journey and aligns the country with:

• International best practices in modern central banking
• Regional peers in the East African Community (Kenya, Uganda, Rwanda already using interest rate frameworks)
• Enhanced policy transmission mechanisms through clearer market signals

This framework change builds on the solid foundation established in 1995 and reflects Tanzania's economic maturation and financial market development.