Commercial banking: how the industry works
Commercial banks provide deposits, credit and payments. Their economics depend on funding stability, loan quality and how quickly assets and liabilities reprice.
Scope and segments
Deposit-taking banks serving households and businesses. This profile separates lending and transaction banking from investment management and securities underwriting. Monetary mechanics are illustrated with Bank of England explanations; supervisory references are U.S. sources.
- Retail banking
- Deposit accounts, mortgages and consumer credit use standardized products and a broad customer base.
- Business banking
- Loans, revolving facilities and cash-management services require understanding business cash flows and collateral.
- Transaction banking
- Payments, collections and treasury services earn fees and can anchor operating deposits.
10 companies to know
Illustrative examples span consumer banking, business lending and international transaction banking across several regions. This alphabetical selection is not a revenue, asset-size or quality ranking.
Listed alphabetically. Names link to official sources. Checked . How we select examples.
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Bank of America
Consumer and business banking
Serves individuals, small businesses and institutions through banking and related financial services. Its customer range illustrates how one banking group supports households and commercial clients.
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BNP Paribas
Diversified banking group
Provides banking and financial services through businesses operating in Europe and other regions. Its group structure illustrates the coordination of different customer and product lines.
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Citi
International transaction banking
Connects corporate and institutional clients across markets and provides banking services for customers. Its international network makes cross-border financial flows a useful operating-model example.
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DBS
Consumer and institutional banking
Provides consumer banking, wealth management and institutional banking services. Its combination of customer segments illustrates how digital delivery supports both individuals and business banking relationships.
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HDFC Bank
Retail and business banking
Offers savings accounts, lending and other banking products in India. Its product range illustrates how a bank serves household needs alongside business financing and transactions.
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HSBC
International banking
Provides banking services through businesses serving different customer groups and markets. Its international presence illustrates the role banks play in connecting trade, investment and customer relationships.
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JPMorganChase
Consumer and commercial banking
Serves consumers and businesses through Chase and corporate and institutional clients through J.P. Morgan. These complementary businesses illustrate the different customer relationships within a banking group.
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MUFG Bank
Corporate and commercial banking
Maintains banking relationships with customers in Japan and overseas. Its international office network illustrates how banks support businesses operating across more than one national market.
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Santander
Retail banking group
Operates retail banking businesses across Europe and the Americas. Its model illustrates how a shared banking group combines customer relationships and operating capabilities across distinct national markets.
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Standard Chartered
Cross-border corporate banking
Connects corporate, institutional and affluent clients through a network focused on Asia, Africa and the Middle East. It illustrates banking organized around international customer connections.
How it works
Follow the main sequence. Actual operating models may combine or outsource individual stages.
- 1
Acquire and verify customers
Establish identity, beneficial ownership where applicable, account terms and payment access. A deposit is the bank’s liability to its customer.
- 2
Underwrite credit
Assess repayment capacity, collateral and concentration. Disbursing a loan normally creates a bank asset and a matching customer deposit; approving an undrawn facility does not.
- 3
Fund and settle
Customer spending can move deposits to other banks. Treasury must obtain settlement liquidity and maintain a stable funding mix.
- 4
Service and monitor
Collect interest, process payments, monitor covenants and identify arrears. Expected credit losses are estimated before all defaults are realized.
- 5
Repay or resolve
Principal repayment reduces the loan. Distressed exposures may be restructured or recovered; economic loss depends on recovery and timing.
How money moves
- Revenue or funding unit
- Interest earned on loans and securities, plus account, payment and service fees.
- Who pays
- Borrowers pay interest; business and household customers pay service fees. Depositors may receive interest from the bank.
Main costs
- Funding
- Deposit interest and wholesale borrowing costs can change faster than the income on fixed-rate loans.
- Credit losses
- Some borrowers cannot repay. A high contractual loan yield is not the same as a high risk-adjusted return.
- Operating infrastructure
- People, branches, technology, compliance, fraud prevention and payment processing support the balance sheet.
Assets and investment
Equity and qualifying regulatory capital absorb losses and constrain risk-taking. Capital is not interchangeable with the cash needed to meet a withdrawal today.
The cash cycle
A bank manages liquidity and maturity mismatches rather than a conventional inventory cycle. Short-notice deposit liabilities may fund loans repaid over years.
The economic mechanism
Net interest income is interest revenue less interest expense. Margin depends on asset mix, funding mix and repricing dates; raising policy rates does not mechanically raise profits. A funding run can force asset sales before underlying loans mature.
Inside the operation
Measures that matter
| Measure | What it measures | Why it matters |
|---|---|---|
| Net interest margin | Net interest income divided by average interest-earning assets. | Makes spread income comparable to the earning balance sheet, but excludes fee income and credit costs. |
| Nonperforming loan ratio | Nonperforming loans divided by loans under a stated definition. | Signals deterioration; classification rules and recoveries matter. |
| Deposit concentration | Share of deposits attributable to large or connected depositor groups. | A concentrated funding base may leave faster than a diversified one. |
Sources: [2]. See source scope below.
What shapes the industry
Banks compete on trust, service, access and price. A payments relationship can attract transaction balances, while expertise in a local business sector can improve credit selection. Both advantages can be offset by excessive concentration.
Scale spreads technology and compliance costs, but a large balance sheet can also accumulate correlated exposures. Regulatory capital, liquidity requirements and supervision affect feasible growth; their exact rules differ by jurisdiction and institution.
Who it connects to
These relationships describe typical flows. They are not a list of every supplier or customer.
Buys from / depends on
- Software
Core platforms run ledgers, servicing and risk reporting.
- Telecommunications
Reliable networks connect branches, customers and payment rails.
Supplies / serves
- Construction
Developers and contractors use financing and cash-management services.
- Real estate
Property borrowers use mortgages and commercial real-estate loans.
- Payments
Payment firms rely on bank accounts, settlement access and safeguarded-funds arrangements where required.
Substitutes and alternatives
- Nonbank lenders and capital markets
Can supply credit, but do not provide every deposit and settlement function of a bank.
Funding reprices before loans
Illustrative calculation
The inputs below are hypothetical. They explain a mechanism and are not industry benchmarks or a forecast.
Assumptions
- Illustrative annual model: $100 million of earning assets yield 6%.
- $90 million of interest-bearing funding costs 2%; other funding is assumed costless.
- Balances, asset yield and all other costs remain fixed.
Calculation
- Interest income: $100m × 6% = $6m. Interest expense: $90m × 2% = $1.8m.
- Net interest income is $4.2m; net interest margin is $4.2m ÷ $100m = 4.2%.
- At a 3% funding cost, expense becomes $2.7m and net interest income falls to $3.3m.
A one-percentage-point funding increase removes $0.9m of spread income. This is before operating expenses, credit losses and taxes.
What changes when…
Depositors move balances into higher-yielding alternatives.
- The bank must either pay more to retain deposits or replace them with another funding source.
- Funding cost rises or available liquidity falls, especially if assets cannot reprice or mature quickly.
- New lending may become more expensive or more selective; a liquidity problem can amplify a credit slowdown.
What to watch
- Funding cost by source
- Deposit outflows and concentration
- Asset repricing schedule
A qualitative scenario based on the operating model, not a quantitative prediction.
Risks and misconceptions
- Funding flight
- Many customers withdraw together, requiring liquidity before long-term assets can be collected.
- Repricing mismatch
- Deposit costs rise while fixed-rate asset income remains unchanged; market values may also fall.
- Correlated defaults
- A regional or sector shock weakens multiple borrowers and their collateral at once.
Sources: [2] [3]. See source scope below.
Common misconceptions
- Banks simply lend out a fixed pile of existing deposits.
- Lending creates deposits, but banks still face settlement, funding, capital, risk and borrower-demand constraints.
- A profitable bank cannot run out of cash.
- Accounting earnings and immediately available liquidity are different; illiquid assets cannot always meet sudden withdrawals without loss.
Sources and scope
Primary references anchor the factual mechanisms below. Operating models, relationship choices, and worked examples are editorial synthesis. Linked sources do not constitute endorsement.
- How is money created?Bank of England
Loan-created deposits, repayment and interbank settlement constraints; UK explainer last updated 2019.
- Liquidity, Comptroller’s HandbookOffice of the Comptroller of the Currency
U.S. supervisory treatment of liquidity, funding concentrations and interactions among risks.
- Interest Rate RiskOffice of the Comptroller of the Currency
Repricing, basis, yield-curve and option risks; March 2020 handbook overview.
- FDIC Community Banking Study 2020Federal Deposit Insurance Corporation
Net interest margin and community-bank business model; historical evidence, not a current performance benchmark.
The operating model and causal analysis are editorial synthesis. All worked-example figures are invented assumptions for explanation, not industry benchmarks. Regulations and payment conventions vary by jurisdiction.
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