This lesson focuses on how commercial banks fund their lending activities—the liability side of the balance sheet—and the role of relationship banking in securing stable, low-cost funding.

6.1 Sources of Bank Funding

A bank’s ability to lend depends on its access to funding. The primary sources are :

  • Customer Deposits: The most stable, and typically the cheapest, source of funding. Banks actively compete for operating deposits, meaning a business uses the bank for its primary cash management and payment needs. A high percentage of “operating deposits” indicates a strong relationship .

  • Wholesale Funding: Funds borrowed from other banks (interbank market), through the issuance of debt securities (commercial paper, bonds), and other capital market instruments.

  • Shareholders’ Equity: The bank’s own capital, which provides a permanent funding base and a buffer against losses.

6.2 Treasury and Cash Management Services

To attract and retain commercial deposits, banks offer sophisticated treasury services . These services are high-margin, fee-based revenue sources that also deepen the client relationship .

  • Core Treasury Services: Liquidity management, payment processing (ACH, wires), and merchant services.

  • Automation and Digitization: Offering clients real-time visibility into their cash positions through digital portals and API-based banking. This is crucial for modern treasury operations .

  • Embedded Finance: Integrating financial solutions directly into a business’s day-to-day operational tools (e.g., financial management software, ERP systems). This makes the bank an essential partner in the client’s business operations .

6.3 Relationship Banking and Primacy

The goal of a commercial bank is to achieve primacy—becoming the primary financial partner for a business client . This is done by delivering a full-service platform (lending, payments, capital markets, and wealth) with deep industry expertise and an integrated delivery model . A “purpose-built platform for middle market clients” is a multi-decade journey, but it results in significant client “stickiness,” with average client tenures of ~15 years .