Central Bank Policy and Interest Income Surge in Nigerian Banks
Despite a slight easing of monetary policy by the Central Bank of Nigeria (CBN), five prominent banks reported a staggering N9.88 trillion in interest income for 2025. This substantial figure underscores the enduring effects of a high interest rate environment on the profitability of the financial sector.
The interest income total, reflecting audited full-year financial results from Zenith Bank Plc, Wema Bank Plc, Stanbic IBTC Holdings Plc, Ecobank Transnational Incorporated, and Guaranty Trust Holding Company Plc (GTCO), marks a remarkable 27.7% increase from N7.74 trillion in 2024. This robust performance persists even as the CBN lowered the Monetary Policy Rate (MPR) to 27% in efforts to combat inflation and stabilize the Naira.
Analysis suggests that the prevailing interest rate landscape continues to enhance bank earnings from loans, advances, and investment securities, even though it has raised borrowing costs for businesses and households. Zenith Bank led the pack with interest income of N3.67 trillion, showcasing a 35% increase from the previous year, further demonstrating its dominance in the sector.
Following Zenith Bank, Ecobank reported N3.19 trillion in interest income, while GTCO achieved N1.65 trillion, reflecting a 23% rise from 2024. Stanbic IBTC saw a formidable 39% increase to N787.05 billion, and Wema Bank experienced a remarkable 62.4% surge to N576.07 billion. In its investor presentation, GTCO attributed its growth to an increase in earning assets and enhanced portfolio yields, although it acknowledged a contraction in non-interest income primarily due to lower fair value and derivative gains.
Industry data has revealed that the average maximum lending interest rate in Nigeria dipped modestly to 29.32% in December 2025, down from 29.71% a year prior, following a peak of 30.50% in February 2025 when the MPR stood at 27.50%. Additionally, the prime lending rate applicable to top-tier borrowers decreased from 18.56% to 18.02% in 2024. Market analysts attribute the rise in interest income to the ongoing tightening posture adopted by the CBN and other central banks across Africa, as they contend with inflationary pressures and currency volatility.
Investment banker Tajudeen Olinka emphasized that the high interest rate climate is a strategic policy aimed at attracting foreign portfolio inflows, boosting foreign exchange reserves, and reinforcing exchange rate stability. He noted that financial product repricing and escalating yields on loans and securities have contributed to the strengthened earnings momentum observed across the banking sector.
CBN Governor Emi Cardoso has previously highlighted the persistent inflationary challenges driven by factors like rising electricity costs, heightened foreign exchange demand, and ongoing structural issues. Despite these pressures, he remains hopeful that the government’s reforms targeted at enhancing local production will help alleviate price pressures in the future.
Nonetheless, analysts warn of a paradox: while banks thrive in a high-yield environment, the broader economy grapples with tighter credit conditions. This scenario risks impinging on economic growth and job creation, especially if elevated interest rates continue for an extended period.
