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Bank

Financial institution that accepts deposits

  • 30 min read
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The Bank of England in Threadneedle Street , London.
Adrian Pingstone · Public domain

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Banks play an important role in financial stability and the economy of a country, so most countries exercise a high degree of regulation over banks. Most countries have institutionalized a system known as fractional-reserve banking, under which banks hold liquid assets equal to only a portion of their current liabilities. In addition to other regulations intended to ensure liquidity, banks are generally subject to minimum capital requirements based on an international set of capital standards, the Basel Accords.

Banking in its modern sense evolved in the fourteenth century in the prosperous cities of Renaissance Italy but, in many ways, functioned as a continuation of ideas and concepts of credit and lending that have their roots in the ancient world. In the history of banking, a number of banking dynasties – notably, the Medicis, the Pazzi, the Fuggers, the Welsers, the Berenbergs, and the Rothschilds – have played a central role over many centuries. The oldest existing retail bank is Banca Monte dei Paschi di Siena (founded in 1472), while the oldest existing merchant bank is Berenberg Bank (founded in 1590).

A banker is a person who engages in the business of banking.

Activities

Standard business

Banks act as payment agents by conducting checking or current accounts for customers, paying checks drawn by customers in the bank, and collecting checks deposited to customers' current accounts. Banks also enable customer payments via other payment methods such as Automated Clearing House (ACH), Wire transfers or telegraphic transfer, EFTPOS, and automated teller machines (ATMs).

Banks borrow money by accepting funds deposited on current accounts, by accepting term deposits, and by issuing debt securities such as banknotes and bonds. Banks lend money by making advances to customers on current accounts, by making installment loans, and by investing in marketable debt securities and other forms of money lending.

Banks provide different payment services, and a bank account is considered indispensable by most businesses and individuals. Nonbanks that provide payment services such as remittance companies are normally not considered as an adequate substitute for a bank account.

Banks issue new money when they make loans. In contemporary banking systems, regulators set a minimum level of reserve funds that banks must hold against the deposit liabilities created by the funding of these loans, in order to ensure that the banks can meet demands for payment of such deposits. These reserves can be acquired through the acceptance of new deposits, sale of other assets, or borrowing from other banks including the central bank.

Range of activities

Activities undertaken by banks include personal banking, corporate banking, investment banking, private banking, transaction banking, insurance, consumer finance, trade finance and other related.

Channels

Banks offer many different channels to access their banking and other services:

  • Branch, in-person banking in a retail location
  • Automated teller machine banking adjacent to or remote from the bank
  • Bank by mail: Most banks accept check deposits via mail and use mail to communicate to their customers
  • Online banking over the Internet to perform multiple types of transactions
  • Mobile banking is using one's mobile phone to conduct banking transactions
  • Telephone banking allows customers to conduct transactions over the telephone with an automated attendant, or when requested, with a telephone operator
  • Video banking performs banking transactions or professional banking consultations via a remote video and audio connection. Video banking can be performed via purpose built banking transaction machines (similar to an Automated teller machine) or via a video conference enabled bank branch clarification
  • Relationship manager, mostly for private banking or business banking, who visits customers at their homes or businesses
  • Direct Selling Agent, who works for the bank based on a contract, whose main job is to increase the customer base for the bank

Business models

Banks generate revenue in a variety of different ways including interest, transaction fees and financial advice. Traditionally, the most significant method is via charging interest on the capital it lends out to customers. The bank profits from the difference between the level of interest it pays for deposits and other sources of funds, and the level of interest it charges in its lending activities.

This difference is referred to as the spread between the cost of funds and the loan interest rate. Historically, profitability from lending activities has been cyclical and dependent on the needs and strengths of loan customers and the stage of the economic cycle. Fees and financial advice constitute a more stable revenue stream and banks have therefore placed more emphasis on these revenue lines to smooth their financial performance.

In the past 20 years, American banks have taken many measures to ensure that they remain profitable while responding to increasingly changing market conditions.

  • First, this includes the Gramm–Leach–Bliley Act, which allows banks again to merge with investment and insurance houses. Merging banking, investment, and insurance functions allows traditional banks to respond to increasing consumer demands for "one-stop shopping" by enabling cross-selling of products (which, the banks hope, will also increase profitability).
  • Second, they have expanded the use of risk-based pricing from business lending to consumer lending, which means charging higher interest rates to those customers that are considered to be a higher credit risk and thus increased chance of default on loans. This helps to offset the losses from bad loans, lowers the price of loans to those who have better credit histories, and offers credit products to high risk customers who would otherwise be denied credit.
  • Third, they have sought to increase the methods of payment processing available to the general public and business clients. These products include debit cards, prepaid cards, smart cards, and credit cards. They make it easier for consumers to conveniently make transactions and smooth their consumption over time (in some countries with underdeveloped financial systems, it is still common to deal strictly in cash, including carrying suitcases filled with cash to purchase a home).
However, with the convenience of easy credit, there is also an increased risk that consumers will mismanage their financial resources and accumulate excessive debt. Banks make money from card products through interest charges and fees charged to credit and debit card holders, and transaction fees to retailers who accept the bank's cards for payments.

This helps in making a profit and facilitates economic development as a whole.

Recently, as banks have been faced with pressure from fintechs, new and additional business models have been suggested such as freemium, monetization of data, white-labeling of banking and payment applications, or the cross-selling of complementary products.

Products

Retail

Business (or commercial/investment) banking

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Source and licence. Adapted from the Wikipedia article “Bank” (this version, 2026-09-30) by its contributors, shared under CC BY-SA 4.0. Lablypedia has left out its tables, references and most pictures, and linked it to other Lablypedia articles.