Sterling Bank Maintains Sub-5% NPL Ratio for Decade Amid Sector Deterioration

Sterling Bank has done something most of its peers have not managed in the past decade: kept its bad loans under control. While the rest of Nigeria's banking sector has watched loan defaults climb steadily higher, Sterling has held its non-performing loan ratio at a steady hum just below the Central Bank's regulatory ceiling. In the first quarter of 2026, the bank's NPL ratio sat at 4.93 percent—a whisper above where it started ten years earlier, when it was 4.80 percent in Q1 2016. That consistency, in a sector now drowning in defaults, amounts to a kind of quiet discipline.

The contrast is stark. While Sterling kept its ratio below the CBN's 5 percent threshold year after year, the broader banking industry has been deteriorating. By January 2026, bad loans across Nigeria's banking sector had swollen to 8.03 percent. The Central Bank's own report that month noted the jump came after banks reclassified loans following the withdrawal of forbearance measures—a technical way of saying that when regulators stopped allowing banks to hide their problems, the problems became visible. The figure climbed another notch by February, reaching 9.85 percent. Sterling's 4.93 percent looks almost conservative by comparison.

What makes this gap meaningful is not just the numbers themselves, but what they signal about the health of the financial system. The CBN has set 5 percent as the prudential threshold—the line beyond which asset quality begins to threaten a bank's stability. The industry's breach of that line, and its continued climb, suggests something more systemic is at work. The Central Bank itself has warned that stubborn rises in non-performing loans can hollow out bank balance sheets and weaken the entire sector's ability to absorb shocks. When nearly one in ten loans across the industry is in default, the risk spreads beyond any single institution.

Sterling's performance raises a natural question: how has one bank managed what others have not? The source material does not offer an answer, but the fact of the divergence is itself instructive. While most banks have seen their asset quality deteriorate as economic pressures mounted across Nigeria, Sterling has maintained a tighter ship. Whether through stricter underwriting, better borrower selection, or more aggressive collection practices, the bank has kept its ratio in a narrow band for a full decade.

The Central Bank's response to the sector-wide deterioration has been prescriptive. Regulators have recommended that financial institutions deepen their use of the Global Standing Instruction framework, a mechanism designed to improve loan recovery efficiency and enforce credit discipline. The GSI framework allows creditors to automatically deduct payments from borrowers' accounts, reducing the friction in collection. The CBN's emphasis on this tool suggests that the problem is not just bad lending decisions made years ago, but ongoing challenges in collecting on loans already made. If banks cannot recover what they are owed, the defaults pile up.

What comes next will depend partly on whether the broader sector can replicate Sterling's discipline, and partly on whether the economic conditions that have driven defaults across Nigeria begin to ease. The CBN has made clear that it sees the rising NPL ratio as a threat to systemic stability. Sterling's decade-long track record suggests that maintaining asset quality is possible even in a deteriorating environment—but it also suggests that most banks have not found the formula, or have not applied it with the same consistency.