A bank is a business that holds your money and lends it out

A bank is an organization licensed by the government to take deposits from people and businesses, keep that money safe, and lend it to other people and businesses. When you put money into a bank account, the bank doesn't lock it away in a vault with your name on it. Instead, the bank uses your money — along with deposits from thousands of other customers — to make loans. The bank pays you a small amount of interest (a percentage of your balance) for letting them use your money. They charge borrowers a higher interest rate on loans. The difference between what they pay you and what they collect from borrowers is how banks make their profit.

This arrangement exists because it solves a problem for everyone involved. You get a safe place to store money and earn a small return without having to find borrowers yourself. Borrowers get access to money they need without having to convince thousands of individual savers. The bank takes on the risk that borrowers might not repay loans, and in exchange, they keep the difference in interest rates.

Key Takeaways

  • A bank holds customer deposits, pays interest on those deposits, and lends that money to borrowers at a higher interest rate.
  • Banks are licensed and regulated by government agencies to protect customer money and may support the bank stays solvent.
  • The Federal Deposit Insurance Corporation (FDIC) insures deposits up to a set amount per account, so your money is protected even if the bank fails.
  • Different types of banks — commercial banks, credit unions, savings banks — serve different customers but operate on the same basic deposit-and-loan model.
  • Banks offer checking accounts, savings accounts, loans, and other financial products as ways to serve customers and generate income.

How banks protect your money

Banks are not free to do whatever they want with customer deposits. The government licenses banks and requires them to follow strict rules about how much money they must keep on hand, how they can invest deposits, and how they report their finances. In the United States, the Federal Deposit Insurance Corporation (FDIC) insures deposits at most banks. This means if the bank fails or goes out of business, the FDIC will pay you back up to $250,000 per account type at that bank. (The amount and what counts as a separate account can vary, so check the FDIC website for your specific situation.)

This insurance exists because banks do fail sometimes — usually because they made bad loans or lost money on investments. Before FDIC insurance existed, bank failures meant customers lost their entire deposit. The insurance was created after the Great Depression to restore public trust in banking. Today, it means you can put money in a bank account without fear that a business failure will wipe out your savings.

The difference between banks and credit unions

A credit union is similar to a bank but is structured as a nonprofit owned by its members (the people who have accounts there) rather than by shareholders trying to make a profit. Credit unions often offer lower fees and better interest rates on savings accounts because they return profits to members instead of paying shareholders. However, credit unions are usually smaller and have fewer branches and ATMs than large banks.

Both banks and credit unions are insured — banks by the FDIC and credit unions by the National Credit Union Administration (NCUA) — so your money is protected at either one. The choice between a bank and a credit union often comes down to convenience (which has more locations near you) and which offers better rates on the accounts you plan to use.

What banks do beyond holding deposits

Banks offer several products beyond a basic checking or savings account. A loan is money the bank lends you that you agree to pay back with interest over time. Common loans include mortgages (for buying a home), auto loans (for buying a car), and personal loans (for any purpose). A credit card is a line of credit the bank extends to you — you borrow money each time you use the card and pay it back monthly. Banks also offer investment services, retirement accounts, and other financial products, though some of these services may be limited depending on the bank's size and focus.

All of these products work the same way: the bank makes money by charging interest or fees, and you benefit by getting access to money or financial tools you need. The bank's job is to assess whether you are likely to repay what you borrow, which is why they ask for information about your income and credit history before approving a loan.

Why banks ask for personal information

When you open an account or explore for a loan, banks ask for your name, address, Social Security number, income, and employment information. Some of this is required by law — the government wants to know who owns each account to prevent money laundering and fraud. The rest helps the bank decide whether to lend you money and at what interest rate.

Banks use this information to check your credit history, which is a record of whether you have borrowed money before and whether you paid it back on time. If you have a history of paying bills late or defaulting on loans, the bank sees you as higher risk and may charge you a higher interest rate or decline your loan request. If you have no credit history at all — because you have never borrowed money — the bank may ask for additional information or require a co-signer (someone who promises to repay the loan if you don't).

How banks make money and stay in business

Banks generate income from the difference between what they pay depositors in interest and what they charge borrowers. If a bank pays you 0.5% interest on your savings account and charges a borrower 6% on a personal loan, the bank keeps the difference. Banks also charge fees — monthly account maintenance fees, overdraft fees (when you spend more than you have), ATM fees, and wire transfer fees. These fees vary widely between banks, which is why it pays to compare before opening an account.

Banks also invest some of the money they hold. They might buy government bonds, corporate bonds, or other investments that generate returns. However, banking regulations limit how much risk banks can take with customer deposits, which is why banks cannot invest deposits in highly speculative ventures. This conservative approach protects your money but also limits how much interest banks can pay on savings accounts.

Types of banks and what they specialize in

Not all banks are the same size or serve the same customers. A commercial bank is the most common type — it serves individuals and businesses, offers checking and savings accounts, and makes loans. A savings bank (sometimes called a thrift) traditionally focused on mortgages and savings accounts but now offers many of the same services as commercial banks. An investment bank helps large companies and wealthy individuals with complex financial transactions like mergers and stock offerings, and typically does not offer checking accounts to regular customers.

For people new to banking, a commercial bank or credit union is usually the right choice. Both offer the basic services you need — a safe place to store money, a way to pay bills, and access to loans — at a reasonable cost. Larger banks have more branches and ATMs, while smaller banks and credit unions may offer better customer service and lower fees.

Frequently Asked Questions

What happens to my money if the bank goes out of business?

The FDIC insures deposits up to $250,000 per account type at each bank. If the bank fails, the FDIC pays you back. If you have more than $250,000 at one bank, only the amount up to the limit is insured, so some people spread large amounts across multiple banks or account types to stay fully protected.

Can I lose money in a savings account?

No. A savings account is not an investment — the bank guarantees your balance will not go down due to market changes. You earn interest (a small percentage return), though the rate is usually very low. The only way your balance decreases is if you withdraw money or the bank charges fees.

Do I need a bank account to get a loan?

Not necessarily, but having a bank account helps. Banks prefer to lend to people who already have accounts with them because it shows you manage money responsibly. If you don't have an account, you can still explore for a loan, but you may face higher interest rates or stricter requirements.

Why do different banks offer different interest rates?

Banks set their own rates based on how much they need deposits, what they can earn by lending that money out, and their operating costs. Larger banks often offer lower rates because they have more deposits and lower costs per customer. Smaller banks and online banks sometimes offer higher rates to attract deposits.

Is my money safer at a big bank or a small bank?

Safety depends on FDIC or NCUA insurance, not bank size. Both large and small banks are insured up to $250,000 per account type. A small bank with FDIC insurance is just as safe as a large bank. The main difference is convenience — large banks have more branches and ATMs, while small banks may offer better personal service.