Banks sort into five categories based on who they serve and what they're allowed to do
The five types of banks are commercial banks, investment banks, savings banks, credit unions, and central banks. Each operates under different rules, serves different customers, and handles different kinds of money movement. Understanding which type you're dealing with matters because their rules, fees, and what they can offer you are not the same.
The distinction exists because banking regulations separate institutions by function. A commercial bank can take deposits and make loans to businesses and individuals. An investment bank cannot take your deposits—it moves money between large institutions and helps companies raise capital. A savings bank focuses on individual savers. A credit union is member-owned and nonprofit. A central bank (like the Federal Reserve in the United States) doesn't serve you directly; it manages the banking system itself and sets interest rates that affect everyone else.
Key Takeaways
- Commercial banks take deposits from individuals and businesses, make loans, and offer checking and savings accounts—this is the bank most people use for everyday banking.
- Investment banks move large sums of money between institutions and corporations, handle mergers and stock offerings, and do not take deposits from regular customers.
- Savings banks (also called thrift institutions) focus on individual savers and mortgages rather than business lending, and are often smaller and more local than commercial banks.
- Credit unions are nonprofit, member-owned institutions that offer similar services to commercial banks but typically charge lower fees and offer better rates on savings.
- Central banks like the Federal Reserve manage the money supply, set interest rates, and oversee other banks—they do not serve individual customers directly.
Commercial banks: the everyday bank you probably use
A commercial bank takes deposits from individuals and businesses, holds that money, and lends it out to other customers. When you open a checking account, deposit a paycheck, or take out a car loan, you're dealing with a commercial bank. The bank pays you interest on savings (usually very small), charges you fees for services, and makes money by lending your deposits to borrowers at a higher interest rate.
Commercial banks are regulated by the Federal Deposit Insurance Corporation (FDIC) in the United States, which means deposits up to $250,000 per account are insured against bank failure. They operate thousands of branches and ATMs, offer online banking, and handle the payment systems that move money between accounts—ACH transfers, wire transfers, debit cards, and checks all run through commercial bank infrastructure.
Examples include Bank of America, Wells Fargo, Chase, and thousands of smaller regional and local banks. The size varies enormously, but the function is the same: they take your money, lend it out, and charge fees for the service.
Investment banks: moving money between institutions and corporations
An investment bank does not take deposits from individuals. Instead, it moves large sums of money between corporations, governments, and other institutions. Investment banks help companies issue stock, arrange mergers and acquisitions, manage bond offerings, and trade securities on behalf of large clients.
Because investment banks do not hold customer deposits, they operate under different rules than commercial banks. They make money through fees and commissions on the deals they arrange, not through the deposit-and-lend model. A company that wants to go public, or a corporation that wants to buy another corporation, hires an investment bank to structure the deal and find buyers or investors.
Investment banks are often part of larger financial institutions. Goldman Sachs, Morgan Stanley, and JPMorgan Chase all have investment banking divisions. You will not open an account at an investment bank as an individual—they serve institutional clients with very large transactions.
Savings banks: focused on individual savers and home loans
A savings bank (also called a thrift institution or savings and loan) takes deposits from individuals and focuses heavily on mortgage lending. Historically, savings banks were created specifically to help ordinary people save money and buy homes, as opposed to commercial banks which served businesses.
The distinction has blurred over time. Many savings banks now offer checking accounts, business loans, and other services that look identical to commercial banks. The key difference is usually in their lending focus—savings banks tend to emphasize mortgages and home equity loans more heavily than commercial banks do. They are also often smaller and more local, though some large savings banks operate nationwide.
Savings banks are also FDIC-insured. Examples include Charles Schwab Bank (which started as a savings bank), and many regional institutions. When you see "Bank" and "Savings Bank" side by side in your area, the savings bank is often the older, more locally rooted institution.
Credit unions: nonprofit, member-owned alternatives
A credit union is a nonprofit financial institution owned by its members. When you open an account at a credit union, you become a partial owner. Credit unions offer checking accounts, savings accounts, loans, and credit cards much like commercial banks do, but they return profits to members through lower fees and better interest rates.
Credit unions are regulated by the National Credit Union Administration (NCUA), which also insures deposits up to $250,000 per account. They typically serve a specific group—employees of a particular company, members of a profession, residents of a geographic area, or people who work in a certain industry. You must meet membership criteria to open an account.
Because credit unions are smaller and nonprofit, they often charge lower fees for overdrafts, wire transfers, and other services. They may also offer better rates on savings accounts and lower interest rates on loans. The tradeoff is that they have fewer branches and ATMs than large commercial banks, though many credit unions participate in shared branching networks that let you use other credit unions' ATMs and branches.
Central banks: managing the banking system itself
A central bank is a government institution that manages the money supply, sets interest rates, and oversees the banking system. In the United States, the Federal Reserve is the central bank. Other countries have their own: the European Central Bank, the Bank of England, the Bank of Japan.
Central banks do not serve individual customers. You cannot open an account at the Federal Reserve or deposit money there. Instead, central banks work with commercial banks, investment banks, and other financial institutions to keep the banking system stable. They set the federal funds rate (the interest rate at which banks lend to each other overnight), which influences the rates that commercial banks charge you for mortgages, car loans, and credit cards.
When you hear news about the Federal Reserve raising or lowering interest rates, that decision affects the entire banking system and eventually reaches you through higher or lower rates on loans and savings accounts. Central banks also act as the bank for the government itself, holding Treasury accounts and managing the nation's money supply.
How these five types work together
The five types of banks form a system. You deposit money at a commercial bank or credit union. That institution lends money to businesses and individuals. Investment banks arrange large deals between corporations. Savings banks focus on mortgages. Central banks set the rules and interest rates that govern all of them.
When you make a payment, it moves through commercial bank infrastructure. When a company goes public, an investment bank structures the offering. When you save for a house, a savings bank or commercial bank holds your down payment. The Federal Reserve watches over all of it and adjusts interest rates to keep the system stable.
Understanding which type of institution you're dealing with helps you know what services they offer, what rules govern them, and what protections explore to your money. A commercial bank and a credit union offer similar services but operate differently. An investment bank serves a completely different purpose. A central bank affects all of them but serves none of them directly.
Frequently Asked Questions
Can a bank be more than one type at once?
Yes. Large institutions like JPMorgan Chase operate as both a commercial bank (taking deposits and making loans) and an investment bank (arranging large corporate deals). They are regulated as both. Smaller institutions usually specialize in one type.
Is my money safer at one type of bank than another?
Commercial banks, savings banks, and credit unions all insure deposits up to $250,000 per account through either the FDIC or NCUA. Investment banks do not take deposits, so this question does not explore to them. Central banks do not serve individual customers. The insurance level is the same across the three types that do serve you.
Why would I choose a credit union over a commercial bank?
Credit unions often charge lower fees and offer better interest rates on savings and loans because they are nonprofit and return profits to members. The tradeoff is fewer branches and ATMs. If you meet their membership requirements and value lower fees, a credit union may be the better choice.
What is the difference between a savings bank and a commercial bank?
Savings banks historically focused on mortgages and individual savers, while commercial banks served businesses. Today the lines blur—many savings banks offer business services and many commercial banks emphasize mortgages. The practical difference is often just size and local focus rather than function.
Does the Federal Reserve set the interest rate I get on my savings account?
The Federal Reserve sets the federal funds rate, which is the rate banks charge each other for overnight loans. Your bank uses this rate as a reference point when setting the interest rate it pays you on savings. When the Fed raises rates, your bank's savings rate usually rises too, though the change may take weeks or months to appear.