Banking Stability: CBN Mandates New Stress Tests; Banks with Capital Shortfalls Face 18-Month Deadline

A New Layer of Regulatory Scrutiny

In a move to fortify the resilience of the nation's financial system, the Central Bank of Nigeria (CBN) has issued a fresh directive requiring all commercial, merchant, and non-interest banks to undergo a comprehensive stress testing exercise. The mandate, contained in a letter addressed to all lenders, is set to take effect from April 1, 2026.

This new requirement arrives just as the industry is concluding the 2024 recapitalisation cycle, which has a deadline of March 31. The apex bank has warned that any institution found to have a capital shortfall following these stress tests will be compelled to raise additional funds to bridge the gap within an 18-month window.

The Mechanics of the Stress Test

The framework is designed to simulate adverse economic conditions to determine their impact on critical banking metrics, specifically Non-Performing Loans (NPLs), Loan Loss Provisions, and the Capital Adequacy Ratio (CAR).

Key Stress Scenarios and Risk Factors:

  • Commodity and Forex Volatility: Assessing the impact of a fall in commodity prices and fluctuations in the foreign exchange market.

  • Supply Chain and Demand Shocks: Evaluating the fallout from disrupted trade routes and declining demand in pivotal economic sectors.

  • Insider-Related Exposures: In a particularly stringent move, the CBN has directed that all loans linked to directors and insiders be treated under a "severe stress scenario," assuming an immediate default requiring 100% provisioning.

  • Asset Migration: Banks must simulate a 12-month deterioration of their credit portfolios, tracking the movement of loans from "performing" status down to "lost" in line with Prudential Guidelines.

Reporting and Capital Requirements

Financial institutions are expected to submit their Board-approved stress test reports by April 30, 2026. The CBN has established a formulaic approach to the subsequent capital requirements: banks must raise either 100% of their own reported shortfall or 50% of the shortfall calculated by the CBN’s independent analysis—whichever figure is higher.

Once this new capital level is communicated, it will serve as the bank’s mandatory risk-based capital requirement. A follow-up stress test will then be conducted six months after the conclusion of the capital raise to ensure the shortfall has been effectively addressed.

Analysis: Beyond the Recapitalisation Milestone

While the CBN recently disclosed that 30 banks have already met the minimum capital thresholds for the current recapitalisation drive, this latest directive suggests that the regulator is shifting from a static capital requirement to a more dynamic, risk-based approach.

By targeting NPLs and insider-related risks, the apex bank is signaling that "having enough cash" is no longer the sole metric for stability; banks must now prove they can survive a significant macroeconomic shock. For the Nigerian banking public, this signifies an era of heightened transparency and a proactive effort to prevent the kind of systemic failures seen in previous decades.

"Lenders that record a capital shortfall after the stress test would be required to raise fresh capital to bridge the gap within an 18-month period. This level of capital shall become the risk-based capital requirement of the bank." — Central Bank of Nigeria Directive