How Retail Banks Make Money
Simon Thompson
Sustainable Finance Expert
Explore how retail banks generate income, manage funding and credit risk, control costs and use scale and customer relationships to deliver sustainable profitability.
Explore how retail banks generate income, manage funding and credit risk, control costs and use scale and customer relationships to deliver sustainable profitability.
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How Retail Banks Make Money
7 mins 33 secs
Key learning objectives:
Explain how retail banks generate income
Describe the role of deposits and net interest margin
Recognise how credit losses and costs affect profitability
Explain why scale and customer lifetime value matter
Overview:
Retail bank profitability depends on more than simply generating revenue. Banks earn income mainly through net interest income, fees and commissions, while managing funding costs, credit losses, operating expenses and capital requirements. Customer deposits are particularly important because they can provide relatively low-cost funding for lending. Different products generate different risk-adjusted returns, so higher interest rates do not necessarily mean higher profits. Strong lending standards, efficient operations and scale all support profitability. Increasingly, banks also focus on customer lifetime value, recognising that long-term relationships can generate value across multiple products and services.
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Summary
How do retail banks generate income?
Retail banks typically earn revenue through a combination of net interest income and fees and commissions.
Net interest income is broadly the difference between interest earned on assets such as mortgages, personal loans and credit cards, and the interest and funding costs associated with deposits and other sources of finance. The resulting spread is closely related to the bank’s net interest margin (NIM).
Banks may also earn account fees, card and transaction income, foreign-exchange charges, advisory fees, insurance commissions and other permitted charges. The mix varies significantly between markets and business models.
Why are deposits so important?
Customer deposits are valuable not only because they create customer relationships, but because they can provide a relatively low-cost and stable source of funding.
Banks use these funds to support lending activities while managing differences in timing between when customers may withdraw deposits and when borrowers repay loans. This role is part of maturity transformation.
The cost and stability of funding therefore have a direct effect on profitability, liquidity and resilience. A bank with strong, stable deposit funding may be less dependent on more expensive wholesale funding.
Why does revenue not always translate into profit?
Different lending products generate different returns and risks. Mortgages may carry relatively low margins but large balances and lower credit risk, while credit cards may generate higher yields but also higher default risk.
Credit losses can quickly reduce the value of otherwise strong revenue growth. Banks therefore monitor arrears, defaults, expected credit losses and recoveries closely. Sustainable profitability depends on what remains after funding costs, operating expenses, credit losses and capital usage are taken into account, rather than simply on the headline interest rate charged.
Why do scale and customer relationships matter?
Retail banks have substantial operating costs, including staff, property, technology, compliance, cyber security and fraud prevention. They also need continued investment in areas such as AI, data and operational resilience.
Scale can improve efficiency because serving ten million customers is not necessarily ten times as expensive as serving one million. Technology and shared infrastructure allow many costs to be spread across a larger customer base.
Banks also increasingly focus on customer lifetime value. A current-account customer may later use savings, mortgages, investments, insurance or business banking. Long-term relationships can therefore create more value than maximising profit from a single product or transaction.
Retail banks typically earn revenue through a combination of net interest income and fees and commissions.
Net interest income is broadly the difference between interest earned on assets such as mortgages, personal loans and credit cards, and the interest and funding costs associated with deposits and other sources of finance. The resulting spread is closely related to the bank’s net interest margin (NIM).
Banks may also earn account fees, card and transaction income, foreign-exchange charges, advisory fees, insurance commissions and other permitted charges. The mix varies significantly between markets and business models.
Why are deposits so important?
Customer deposits are valuable not only because they create customer relationships, but because they can provide a relatively low-cost and stable source of funding.
Banks use these funds to support lending activities while managing differences in timing between when customers may withdraw deposits and when borrowers repay loans. This role is part of maturity transformation.
The cost and stability of funding therefore have a direct effect on profitability, liquidity and resilience. A bank with strong, stable deposit funding may be less dependent on more expensive wholesale funding.
Why does revenue not always translate into profit?
Different lending products generate different returns and risks. Mortgages may carry relatively low margins but large balances and lower credit risk, while credit cards may generate higher yields but also higher default risk.
Credit losses can quickly reduce the value of otherwise strong revenue growth. Banks therefore monitor arrears, defaults, expected credit losses and recoveries closely. Sustainable profitability depends on what remains after funding costs, operating expenses, credit losses and capital usage are taken into account, rather than simply on the headline interest rate charged.
Why do scale and customer relationships matter?
Retail banks have substantial operating costs, including staff, property, technology, compliance, cyber security and fraud prevention. They also need continued investment in areas such as AI, data and operational resilience.
Scale can improve efficiency because serving ten million customers is not necessarily ten times as expensive as serving one million. Technology and shared infrastructure allow many costs to be spread across a larger customer base.
Banks also increasingly focus on customer lifetime value. A current-account customer may later use savings, mortgages, investments, insurance or business banking. Long-term relationships can therefore create more value than maximising profit from a single product or transaction.
Subscribe to watch
Access this and all of the content on our platform by signing up for a 7-day free trial.
Simon Thompson
Simon Thompson is an accomplished executive with over 17 years of leadership in banking and finance, specialising in ethical and sustainable finance. As Managing Director of the Global Capacity Building Coalition (GCBC), he drives global efforts to enhance financial systems through capacity building and education. Previously, as Chief Executive of the Chartered Banker Institute, Simon transformed it into a global leader in socially responsible banking, advocating for ethics, culture, and sustainable finance. He is the author of "Green and Sustainable Finance: Principles and Practice".
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