This lesson establishes the core business model of commercial banks, focusing on how they generate profit through financial intermediation and the key revenue drivers that sustain their operations.

1.1 The Commercial Bank’s Core Business

A commercial bank is a financial institution that accepts deposits from the public and uses those funds to extend loans to businesses and individuals . This is the classic model of financial intermediation. The primary function is to channel funds from savers (depositors) to borrowers (businesses), facilitating economic growth and commerce .

1.2 Key Components of the Banking Business Model

The commercial banking business model is built around several interrelated activities:

• Deposit-Taking: The foundation of the bank’s funding. Banks offer a range of deposit products—checking accounts, savings accounts, and time deposits—that provide a stable and cost-effective source of funds to be deployed in loans and other assets .

• Lending: Banks generate a significant portion of their income by deploying their funds into loans. The main categories of commercial lending include commercial real estate loans, commercial and industrial (C&I) loans to businesses for operations and expansion, and asset-based lending .

• Fee-Based Services: Banks generate fees for non-lending activities. These high-margin services include treasury management (cash flow and payment services), foreign exchange, trade finance, and advisory services .

1.3 Generating Revenue

Commercial banks generate revenue through two primary streams: net interest income (NII) and non-interest revenue (NIR) .

• Net Interest Income (NII): This is the primary driver of profitability, representing the spread between the interest earned on loans and securities and the interest paid on deposits and other liabilities . The Net Interest Margin (NIM) is a key metric measuring this spread relative to the bank’s average earning assets .

• Non-Interest Revenue (NIR): As interest margins tighten, banks increasingly rely on NIR to drive sustainable growth . This includes fees from treasury and cash management, loan origination, trade finance, and advisory services .

1.4 Competitive Landscape

Scale advantages, regulatory capital requirements, and the cost of technology investments create significant barriers to entry, contributing to the “moats” that protect established commercial banks . Banks compete by building deposit franchise value—the ability to attract low-cost, stable deposits—and by creating switching costs for clients through integrated treasury and payment solutions that become embedded in their operations . A client with a 15-year banking relationship demonstrates the power of this integrated model .