A financial institution is an organization that channels money between people who have it and people who need it, and U.S. law recognizes several distinct types, from commercial banks and credit unions to insurers, brokerages, and money transmitters. There is no single federal definition of a financial institution and no single list of types; the meaning shifts with the statute, and the categories track how each kind of firm gathers and deploys funds. The practical answer to “what is a financial institution and what are the types” has two parts: the legal definition you’re working under, and the functional category the firm falls into.
How Federal Law Defines the Term
Federal statutes define “financial institution” differently depending on what each law is trying to accomplish. Two definitions do most of the work.
Under federal criminal law, the term is narrow and focused on chartered banking entities. It covers insured depository institutions, credit unions with federally insured accounts, Federal Reserve member banks, Federal Home Loan Banks, Farm Credit System institutions, small business investment companies, depository institution holding companies, and mortgage lending businesses.1Office of the Law Revision Counsel. 18 U.S. Code 20 – Financial Institution Defined This definition exists to establish which organizations are protected by federal bank fraud and embezzlement statutes.
The Bank Secrecy Act uses a much broader definition for anti-money laundering purposes. It treats as a financial institution not just banks and credit unions, but also broker-dealers, insurance companies, currency exchanges, money transmitters, pawnbrokers, dealers in precious metals, travel agencies, vehicle sellers, real estate settlement providers, and even the U.S. Postal Service.2Office of the Law Revision Counsel. 31 U.S. Code 5312 – Definitions and Application If a business touches the movement of money in almost any form, the federal government likely treats it as a financial institution for at least some regulatory purpose.
So whether a given firm counts depends on which law you are reading. A pawnbroker is not a financial institution under the criminal code but plainly is one under the BSA.
The Three Functional Types
Beyond the statutory definitions, financial institutions fall into three broad categories based on how they raise money and what they do with it. Large firms today often operate across all three, but the distinction still explains how each kind of institution works.
Depository Institutions
Depository institutions accept deposits from the public and use the pooled funds to make loans. The gap between what they pay depositors and what they charge borrowers is their main revenue. This group includes commercial banks, savings institutions (sometimes called thrifts), and credit unions.
Commercial banks and savings institutions are chartered either federally by the Office of the Comptroller of the Currency or at the state level by a state banking regulator.3OCC. About Us Deposits at these institutions are insured up to $250,000 per depositor, per bank, per ownership category by the Federal Deposit Insurance Corporation.4FDIC.gov. Understanding Deposit Insurance
Credit unions are different. They are nonprofit cooperatives owned by their members, and you have to meet eligibility rules to join, usually tied to an employer, community, or affiliated group. Federal credit unions are chartered and supervised by the National Credit Union Administration. Their deposits, called shares, are insured up to $250,000 per member through the National Credit Union Share Insurance Fund, which works similarly to FDIC coverage.5NCUA. Share Insurance Coverage
Contractual Institutions
Contractual institutions collect money through long-term agreements that require periodic payments and promise a future payout. Insurance companies are the clearest example. They collect premiums from policyholders, invest the pooled funds, and pay claims as they arise. Pension funds work the same way, taking in contributions from employees and employers over decades and investing to meet retirement obligations years later.
Because their obligations are long-dated and reasonably predictable, contractual institutions can hold less liquid assets like corporate bonds, real estate, and infrastructure. That makes them some of the largest institutional investors in the economy, even though most people don’t think of their insurer as an investment firm.
Investment Institutions
Investment institutions build their business around the creation and trading of securities rather than deposits or premiums. Investment banks underwrite new stock and bond issues, helping corporations and governments raise capital. Brokerage firms execute trades for individual and institutional clients. Mutual funds and exchange-traded funds pool money from many investors and invest it according to a stated strategy, giving ordinary people access to diversified portfolios they could not assemble on their own.
These institutions earn revenue mainly through fees: advisory fees, underwriting commissions, trading commissions, and asset management charges based on a percentage of assets under management. Their role is to connect those who need capital with those willing to provide it, and to run the market infrastructure that makes buying and selling securities possible.
Where Neobanks Fit
App-based banking has created a distinction that catches a lot of people off guard. An online bank that holds a banking charter, with no branches, is a bank in every legal sense. It is directly regulated, directly insured, and holds your deposits itself.
A neobank is different. Most neobanks are technology companies without a banking charter. They partner with a chartered bank behind the scenes to offer deposit accounts and other services. Your money eventually sits in the partner bank’s accounts, but the neobank itself is not FDIC-insured and is not a bank under the law.
This matters. The FDIC does not cover the failure of a nonbank company itself. If a neobank goes bankrupt, your funds are protected only if they have actually been deposited into the FDIC-insured partner bank and proper records identify you as the owner. Even then, recovering your money through a bankruptcy proceeding can take time.6FDIC.gov. Banking With Third-Party Apps If you keep meaningful cash in a neobank account, confirm that the partner bank is FDIC-insured and that your ownership of the deposited funds is clearly documented.
Who Regulates Each Type
No single agency oversees all financial institutions. The U.S. uses overlapping federal and state regulators, each responsible for certain types of firms or certain activities. The pattern tracks the categories above.
Federal Reserve
The Federal Reserve is the central bank. Congress has given it a dual mandate to promote maximum employment and stable prices, which it pursues mainly by setting a target for the federal funds rate.7Federal Reserve. Monetary Policy: What Are Its Goals? How Does It Work? On the supervisory side, the Fed regulates all bank holding companies, whether their subsidiary banks are chartered nationally or by a state.8Federal Reserve System. Bank Holding Company Supervision Manual
Office of the Comptroller of the Currency
The OCC charters, regulates, and supervises all national banks and federal savings associations. It approves or denies applications for new charters, branches, and mergers, and takes enforcement action against banks that break applicable laws.3OCC. About Us If your bank has “National” in its name or “N.A.” after it, the OCC is its primary federal regulator.
FDIC
The Federal Deposit Insurance Corporation insures deposits at member banks up to $250,000 per depositor, per insured bank, per ownership category.9Federal Deposit Insurance Corporation. Deposit Insurance FAQs Coverage applies separately to different account types: a single account, a joint account, and a retirement account at the same bank each carry their own $250,000 limit. The FDIC is also the primary federal regulator for state-chartered banks that are not members of the Federal Reserve System.
NCUA
The National Credit Union Administration is the parallel regulator for credit unions. It charters and supervises federal credit unions and runs the Share Insurance Fund, insuring member deposits up to $250,000 per member, with separate coverage for joint accounts, IRAs, and trust accounts.5NCUA. Share Insurance Coverage
SEC
The Securities and Exchange Commission oversees the capital markets, regulating securities exchanges, broker-dealers, investment advisers, and mutual funds, with a core mission of protecting investors, maintaining fair and orderly markets, and facilitating capital formation.10Securities and Exchange Commission. U.S. Securities and Exchange Commission Home Its Division of Trading and Markets directly regulates broker-dealers and self-regulatory organizations such as stock exchanges and FINRA.11Securities and Exchange Commission. Division of Trading and Markets
CFPB
The Consumer Financial Protection Bureau was created by the Dodd-Frank Act in 2010 to consolidate consumer protection authority that had been scattered across multiple agencies. It supervises banks, thrifts, and credit unions with more than $10 billion in assets, along with nondepository mortgage lenders, payday lenders, and private student lenders of all sizes.12Consumer Financial Protection Bureau. Institutions Subject to CFPB Supervisory Authority It also supervises larger participants in consumer reporting, debt collection, student loan servicing, international money transfers, and auto financing. When you file a complaint about an unfair practice by a bank or lender, the CFPB usually handles it.
How These Institutions Make Money
The three categories differ not just in what they do but in how they earn. Banks earn a net interest margin, the spread between what they pay on deposits and what they charge on loans, along with growing fee income from overdrafts, ATM surcharges, wire transfers, loan origination, and wealth management.
Insurance companies earn from premiums and from investment returns on the float, the money collected in premiums that has not yet been paid out as claims. Investment banks and brokerages earn underwriting fees, advisory fees on mergers and acquisitions, and trading commissions. Mutual fund companies charge annual expense ratios based on a percentage of assets under management, typically ranging from under 0.10% for index funds to over 1% for actively managed strategies.
Understanding how a given institution earns tells you something about its incentives. A bank that leans on fee income has a reason to steer you toward products with higher fees; an investment advisor paid on commission has different motivations than one paid a flat fee. That is one reason regulators pay close attention to conflicts of interest across the industry.