The data on lending and deposit interest rates from the Bank of Tanzania's Monthly Economic Review (September 2025) indicate a gradual easing in borrowing costs amid stable savings returns, aligning with the broader monetary policy shift following the Central Bank Rate (CBR) cut to 5.75% in July 2025. This occurs against a backdrop of robust economic momentum, with Q3 2025 GDP growth estimated above 6% (driven by agriculture, mining, and construction) and headline inflation at a benign 3.4%. The narrowing interest rate spread suggests improving financial intermediation efficiency, which could sustain private sector credit expansion (16.2% y-o-y in August). Drawing from the document and recent analyses, these trends imply enhanced affordability of credit, bolstering investment and consumption while mitigating risks from global uncertainties like elevated policy volatility.

When contextualized with international outlooks, such as the IMF's projection of 6% GDP growth and 4% inflation for 2025, and the World Bank's upgraded Sub-Saharan Africa forecast to 3.8% (with Tanzania as a regional outperformer), the rate dynamics signal a supportive environment for inclusive development. However, persistently high lending rates (above 15%) could still constrain SME access, potentially capping growth below potential if not addressed through further reforms.

1. Lending Rates (TZS-denominated loans)

• Overall lending rate eased to 15.07% in Aug 2025 (15.16% in July).
• Short-term lending rate (≤1 year): 15.64% (15.51% in July).
• Medium-term lending (1–2 years): 16.45%.
• Medium-term lending (2–3 years): 15.01%.
• Long-term lending (3–5 years): 14.02%.
• Term loans (>5 years): 14.22%.
• Negotiated lending rate (prime borrowers): 12.72% (up slightly from 12.56% in July).

2. Deposit Rates (TZS-denominated deposits)

• Savings deposit rate: 2.90% (unchanged from July).
• Overall time deposit rate: 8.61% (slightly down from 8.83% in July).
• By maturity:
  • 1-month: 10.70%
  • 2-month: 10.07%
  • 3-month: 8.59%
  • 6-month: 10.44%
  • 12-month: 9.99%
  • 24-month: 7.16%
• Negotiated deposit rate: 10.99% (up from 10.72% in July).

3. Interest Rate Spread

• Short-term spread (1-year lending – 1-year deposit): 5.66 percentage points, narrower than 6.68 points in Aug 2024.

Table: Lending and Deposit Interest Rates – August 2025

Implications for Tanzania's Economic Development

1. Lending Rates: Gradual Easing to Fuel Investment, But High Levels Pose Affordability Challenges

• Key Observations Recap: The overall TZS lending rate dipped to 15.07% (from 15.16% in July), with short- and medium-term rates stable around 15-16%. Longer-term rates (3+ years) trended lower at 14-14.22%, while prime (negotiated) rates edged up to 12.72%. This follows a broader decline from 15.23% in June, per earlier reviews.
• Implications for Economic Development:
  • Boost to Private Sector Expansion: The modest easing enhances credit affordability, directly supporting the 16.2% y-o-y private credit growth noted in the document, particularly in high-impact sectors like agriculture (30.1%) and trade (29.2%). Lower long-term rates could accelerate infrastructure financing, such as renewable energy projects or agricultural mechanization, aligning with Tanzania's FY2024/25 growth of 5.6% driven by these areas. The Deloitte East Africa Outlook (2025) highlights that such rate cuts foster fixed investment optimism, potentially drawing foreign direct investment (FDI) up 10-15% in services and mining.
  • Inclusive Growth Potential: Personal loans (36% of credit) for MSMEs stand to benefit, aiding job creation in a context of 5.5% unemployment. However, rates above 15% remain elevated regionally (e.g., vs. Kenya's 13-14%), which a ResearchGate study links to slowed consumer spending and higher commodity costs, risking a 0.5-1% drag on GDP if unmitigated.
  • Risks: The slight uptick in prime rates may signal selective tightening for low-risk borrowers, potentially widening inequality in credit access. Amid moderating global oil prices (Chart 1.5), sustained high rates could amplify imported inflation pass-through to transport costs (1.4% inflation component).

2. Deposit Rates: Stability with Upside for Savings Mobilization

• Key Observations Recap: Savings rates held at 2.90%, while overall time deposits fell slightly to 8.61% (from 8.83%). Shorter maturities (1-2 months) offered 10-10.7%, dropping to 7.16% for 24 months; negotiated rates rose to 10.99% (from 10.72%).
• Implications for Economic Development:
  • Strengthened Banking Liquidity and Funding: Rising negotiated rates attract institutional savers (e.g., pensions), funding the 21% M3 money supply growth and reducing reliance on costly interbank borrowing (IBCM rates at 6.48%). This ties into the SECO Economic Report (2025), where deposit rates averaged 8.14% annually, supporting 15.1% private credit expansion and financial deepening (bank deposits at 25% of GDP).
  • Encouraging Household Savings: Unchanged low savings rates may deter retail savers amid 3.4% inflation, but competitive time deposit yields (up y-o-y) promote formal savings, crucial for resilience against food price shocks (7.7% food inflation). The World Bank's January 2025 prospects note that easing rates overall will rebound household consumption by 2-3% in 2025, as savers shift to productive investments.
  • Risks: The dip in longer-term deposits could signal caution on inflation outlook, potentially limiting banks' long-term lending capacity if global commodity pressures (e.g., elevated fertilizers) erode confidence.

3. Interest Rate Spread: Narrowing Margins Signal Efficiency Gains

• Key Observations Recap: The short-term spread (1-year lending minus deposit) tightened to 5.66 percentage points (from 6.68 pp in August 2024), reflecting faster deposit rate adjustments than lending.
• Implications for Economic Development:
  • Improved Financial Intermediation: A narrower spread indicates better policy transmission from the CBR cut, pressuring banks to optimize costs and pass on benefits to borrowers. This supports the document's liquidity improvements (via reverse repos), fostering a 23.2% broad money (M2) growth and efficient resource allocation to growth sectors.
  • Bank Profitability and Stability: While margins compress (potentially squeezing net interest income by 0.5-1%), it encourages non-lending revenue diversification (e.g., fees), enhancing sector resilience. A RePEc study on Tanzania notes that govt borrowing crowds out spreads, but current trends mitigate this, aiding fiscal-monetary coordination for 4.5% deficit financing.
  • Risks: Further narrowing could raise non-performing loans if banks cut risky lending, per the ResearchGate analysis, especially in agriculture vulnerable to weather (e.g., El Niño echoes).

Overall Summary and Forward Outlook

These rate movements imply a pro-cyclical boost to Tanzania's development: easing lending costs and mobilizing deposits sustain credit-driven growth (targeting 6% GDP), while the narrowing spread enhances efficiency amid low inflation risks. This aligns with the IMF's 2025 staff report praising policy easing for strong activity (5.5% in 2024, accelerating), and the World Bank's emphasis on lower rates spurring consumption and FDI. Compared to EAC peers (e.g., Uganda's wider 7-8 pp spreads), Tanzania's metrics underscore competitive advantages.

Yet, high baseline lending rates highlight needs for structural reforms like digital lending to cut costs 2-3%. If global trends hold (e.g., SSA inflation easing per WB), Q4 2025 could see further declines, pushing annual growth to 6.2-6.5%. Monitor debt dynamics, as domestic borrowing (TZS 1,644 bn in August) could reverse spreads if issuance accelerates.