Tanzania’s external debt has surged from 2,469.7 USD Million in December 2011 to 34,056 USD Million in March 2025, representing a 13.8-fold increase over 14 years, or an average annual growth rate of approximately 20.8%. This dramatic rise reflects a combination of economic, infrastructural, and policy drivers that have fueled borrowing to support Tanzania’s development ambitions. Below, I outline the key factors driving this growth, supported by figures and data from available sources, including the Bank of Tanzania and other economic analyses.

1. Economic Drivers

Tanzania’s economic growth and structural transformation goals have necessitated significant external borrowing to bridge fiscal deficits and finance development projects. Key economic factors include:

• Fiscal Deficits and Revenue Shortfalls: Tanzania’s fiscal deficit has consistently required external financing, as tax revenues (e.g., 13% of GDP in 2024) remain low compared to regional peers. The fiscal deficit was 3.8% of GDP in 2022/23, up from 3.4% in 2021/22, driven by increased public spending. To cover this, external debt rose to USD 34.1 billion (TZS 91.29 trillion at TZS 2,677/USD) by March 2025, with 78.3% held by the central government.
• Foreign Exchange Needs: A 2.6% shilling depreciation in 2024/25 and an 8% depreciation in 2023 increased the cost of servicing USD-denominated debt (67.7% of external debt, or USD 23.1 billion). Declining export revenues from commodities like coffee (-2%) and sugar (-1.5%) strained foreign exchange reserves, necessitating borrowing to maintain import cover (e.g., USD 5.7 billion, 3.8 months of imports in 2025).
• Economic Growth Ambitions: Tanzania’s GDP grew from USD 33.2 billion in 2011 to USD 75.5 billion in 2022, with projections of 5.6% growth in 2024 and 6% in 2025. This growth, driven by agriculture, manufacturing, and tourism, required external financing to sustain investments in productive sectors. For example, foreign direct investment (FDI) rose to USD 922 million in 2021, supporting projects like the Kabanga Nickel Project, which increased borrowing needs.

2. Infrastructural Drivers

Tanzania’s ambitious infrastructure agenda has been a primary driver of external debt growth, with significant borrowing to fund transformative projects in transport, energy, and urban development. Key projects include:

• Standard Gauge Railway (SGR): The SGR, a flagship project to connect Dar es Salaam to inland regions and neighboring countries, has been a major contributor to debt growth. The project’s cost, estimated at USD 7.6 billion for multiple phases, has been largely financed through external loans, particularly from China and multilateral institutions.
• Energy Infrastructure: Investments in energy, such as the 532 km gas pipeline from Mnazi Bay to Dar es Salaam (completed in 2015, costing USD 1.2 billion) and plans to increase electricity capacity to 10,000 MW by 2025, have driven borrowing. In 2013, 49.7% of electricity came from natural gas, and projects like the Ntorya gas field (projected to produce 40 million cubic feet/day by 2025) required external financing.
• Port and Transport Upgrades: The modernization of Dar es Salaam Port, including a USD 250 million investment by DP World (UAE) in 2023, and the East African Crude Oil Pipeline (EACOP, USD 5 billion), have increased external debt. These projects aim to position Tanzania as a regional trade hub.
• World Bank Financing: As of March 2025, 48% of the World Bank’s USD 10 billion portfolio in Tanzania supports infrastructure, including roads, railways, and power projects, significantly contributing to the external debt stock.

3. Policy Drivers

Government policies aimed at economic diversification, poverty reduction, and structural reforms have shaped borrowing patterns, with a focus on concessional and non-concessional loans. Key policy drivers include:

• Concessional Borrowing from Multilateral Institutions: Multilateral creditors account for 53.9% of external debt (USD 18.3 billion) as of January 2025, with the World Bank, IMF, and African Development Bank providing concessional loans. In 2021, the IMF provided USD 567.25 million in emergency assistance for COVID-19 recovery, and the 2022–2025 Extended Credit Facility (ECF) program unlocked USD 150 million in 2025 to support fiscal sustainability.
• Non-Concessional Borrowing: External non-concessional borrowing has risen to finance infrastructure, accounting for 36.3% of external debt (USD 12.4 billion) in January 2025. Commercial creditors, including Chinese loans for projects like the SGR, have driven debt growth, increasing exposure to higher interest rates.
• Vision 2025 and Development Goals: Tanzania’s Vision 2025 aims for a GDP growth rate of 8% annually, requiring investments in infrastructure, education, and health. The FY 2024/25 budget of TZS 49.35 trillion (USD 18.4 billion) included TZS 29.41 trillion (59.6%) from tax revenue, with the deficit financed by external borrowing. The planned 13.4% spending increase to TZS 57.04 trillion in FY 2025/26 further drives borrowing.
• Business Environment Reforms: Policies to improve the investment climate, such as tax code revisions and the creation of the Tanzania Investment Centre, have attracted FDI but also increased borrowing for co-financed projects. For example, Chinese investments in the Mchuchuma coal and Liganga iron ore projects (USD 3 billion) in 2011 required complementary government borrowing.

Quantitative Insights

• Debt Growth Trajectory:
  • 2011: USD 2,469.7 million (Bank of Tanzania).
  • 2019: USD 22.4 billion (40% of GDP, 6% YoY increase from 2018).
  • 2023: USD 32,090 million (disbursed, January 2025).
  • March 2025: USD 34,056 million, a 6.1% increase from January 2025 (USD 32,090 million).

• Debt-to-GDP Ratio: Rose from 32.68% in 2013 to 46.87% in 2023 (total public debt), with external debt at ~32-35% of GDP in 2025, assuming a GDP of ~USD 100 billion.
• Debt Composition (January 2025):
  • Multilateral: 53.9% (USD 18.3 billion).
  • Commercial: 36.3% (USD 12.4 billion).
  • Bilateral: 4.2% (USD 1.4 billion).
  • Export Credit: 5.6% (USD 1.9 billion).
• Debt Servicing: Absorbs ~40% of government expenditures, with external debt service estimated at USD 1-2 billion annually and domestic at TZS 5.31 trillion in 2025.

Challenges and Risks

• Exchange Rate Risks: With 67.7% of external debt in USD, the 2.6% shilling depreciation in 2024/25 increases servicing costs by approximately TZS 2.38 trillion for the USD-denominated portion.
• Global Economic Pressures: The IMF’s global growth forecast of 2.8% for 2025 and rising interest rates elevate borrowing costs, particularly for non-concessional loans.
• Fiscal Space Constraints: High debt servicing limits investments in social sectors, with 3% of GDP spent on debt servicing in 2024.
• COVID-19 Impact: Emergency borrowing, including USD 567.25 million from the IMF in 2021, contributed to debt spikes to address health and economic costs.

Conclusion

The 13.8-fold increase in Tanzania’s external debt from 2,469.7 USD Million in 2011 to 34,056 USD Million in March 2025 is driven by economic needs (fiscal deficits, foreign exchange shortages), major infrastructure projects (SGR, energy, ports), and policy choices favoring concessional and non-concessional borrowing to achieve Vision 2025 goals. While debt remains sustainable (moderate risk per IMF DSA), with a debt-to-GDP ratio of ~32-35%, challenges like shilling depreciation and high debt servicing costs underscore the need for prudent fiscal management and revenue mobilization.

This table consolidates the key figures driving Tanzania’s external debt growth, highlighting economic factors (fiscal deficits, GDP growth), infrastructure projects (SGR, energy, ports), and policy decisions (concessional and non-concessional borrowing). The 13.8-fold increase reflects Tanzania’s development ambitions, balanced by a sustainable debt-to-GDP ratio of ~32-35% in 2025.

Notes:

• Debt Growth: From 2,469.7 USD Million (2011) to 34,056 USD Million (Mar 2025), driven by fiscal deficits, infrastructure, and policy goals.
• Infrastructure Costs: SGR (USD 7.6 billion), gas pipeline (USD 1.2 billion), and port upgrades (USD 250 million) are major contributors.
• Debt Composition: Multilateral (53.9%, USD 18.3 billion), commercial (36.3%, USD 12.4 billion), bilateral (4.2%, USD 1.4 billion), export credit (5.6%, USD 1.9 billion) as of Jan 2025.
• Economic Context: GDP growth from USD 33.2 billion (2011) to ~USD 100 billion (2025) supports debt sustainability, but shilling depreciation (8% in 2023, 2.6% in 2024/25) increases servicing costs.
• Policy Impact: Vision 2025 and FY 2024/25 budget (TZS 49.35 trillion, USD 18.4 billion) drive borrowing, with 59.6% funded by taxes and the rest by loans.