A bank is a business that holds your money, lends it to other people, and charges fees or pays interest for the service

A bank is not a safe-deposit box or a government agency. It is a for-profit company licensed by the state or federal government to take deposits from customers, lend that money to borrowers, and make money on the difference between what it pays you and what it charges them. When you put money in a bank account, you are lending that money to the bank. The bank then uses your deposit—along with deposits from thousands of other customers—to make loans to businesses and individuals. The bank pays you a small amount of interest (or nothing at all) and charges borrowers a much larger amount. That spread is how the bank makes its profit.

Banks are required to follow strict rules about how much money they must keep on hand, how they can invest deposits, and what they must tell you about fees and interest rates. The Federal Deposit Insurance Corporation (FDIC) insures deposits up to $250,000 per account holder per bank, which means if the bank fails, the government will return your money up to that limit. This protection is automatic—you do not need to do anything to set up it.

Key Takeaways

  • A bank is a licensed business that holds your deposits, lends money to others, and makes profit on the interest rate difference.
  • The FDIC insures deposits up to $250,000 per account holder per bank if the bank fails, and this protection is automatic.
  • Banks charge fees for services like overdrafts, monthly maintenance, and wire transfers, and these fees vary widely between institutions.
  • Banks are regulated by state or federal agencies and must follow rules about capital reserves, lending practices, and disclosure of terms.
  • Your money in a bank account is not the same as cash under your mattress—it exists as a digital record and a claim against the bank.

How banks make money from your deposits

When you deposit $1,000 into a checking account, the bank now has access to that $1,000. If the bank pays you 0.01% interest per year, it owes you about $0.10 annually. But the bank can lend that same $1,000 to a borrower at 5% interest, earning $50 per year. The bank keeps the difference—roughly $49.90—as profit. Multiply that across thousands of depositors and millions of dollars, and you see why banks are profitable.

The interest rate a bank offers you depends on the federal funds rate (set by the Federal Reserve), the bank's own costs, and how much competition exists in your area. Banks in areas with many competitors often offer higher interest rates on savings accounts because they need to attract deposits. Banks in areas with few competitors may offer lower rates because customers have fewer options.

What happens to your money when you deposit it

Your deposit does not sit in a vault with your name on it. Instead, the bank records a digital entry showing that you own a certain amount of money. That entry is a liability for the bank—a debt the bank owes you. The bank then pools your deposit with deposits from other customers and uses that pool to make loans, buy securities, or invest in other ways.

You can withdraw your money whenever you want (with some exceptions for certain savings products), and the bank must give it to you. If many customers try to withdraw at once, the bank uses its cash reserves to pay them. If the bank does not have enough cash on hand, it can borrow from other banks or from the Federal Reserve. If a bank runs out of money and cannot borrow more, it fails—and the FDIC steps in to return your deposits up to $250,000.

Types of bank accounts and what they cost

Banks offer different account types, each with different rules and fees. A checking account is designed for frequent deposits and withdrawals—you can write checks, use a debit card, and set up automatic payments. A savings account is designed to hold money longer and typically pays interest, but limits how many withdrawals you can make per month. A money market account is a hybrid that pays higher interest than a savings account but requires a larger minimum balance and limits withdrawals. A certificate of deposit (CD) locks your money away for a set period (three months to five years) in exchange for a may provide interest rate.

Banks charge fees for services and for breaking their rules. Common fees include monthly maintenance fees (typically $5 to $15), overdraft fees (typically $25 to $35 per overdraft), wire transfer fees ($15 to $50), and ATM fees if you use an out-of-network machine. Some banks waive monthly fees if you maintain a minimum balance or set up direct deposit. Fees vary widely, so comparing banks before opening an account can save you money.

Who regulates banks and what that means for you

Banks are regulated by multiple agencies depending on their charter type. A national bank (one with "National" in its name) is regulated by the Office of the Comptroller of the Currency (OCC) and the FDIC. A state bank is regulated by the state banking authority and the FDIC. Credit unions are regulated by the National Credit Union Administration (NCUA) and offer similar protections to FDIC insurance.

Regulation means banks must maintain certain capital reserves, undergo regular audits, follow lending rules, and disclose their terms and fees to you in writing. If a bank violates these rules, regulators can fine it, force it to change practices, or shut it down. This system protects you by ensuring the bank has enough money to return your deposits and cannot engage in reckless lending or fraud.

The difference between a bank and other financial institutions

A credit union is similar to a bank but is structured as a nonprofit cooperative owned by its members. Credit unions often charge lower fees and pay higher interest rates on savings because they do not need to generate profit for shareholders. However, credit unions are smaller and may have fewer branches and ATMs than banks.

A brokerage firm is not a bank. It buys and sells stocks, bonds, and other investments on your behalf. A brokerage may hold your cash in a settlement account, but that cash is not a bank deposit and may not be FDIC insured (though many brokerages carry additional insurance). A money transmitter or payment processor (like PayPal or Square Cash) moves money between accounts but does not hold deposits the way a bank does.

What FDIC insurance actually covers

FDIC insurance covers deposits you hold in your own name up to $250,000 per bank. If you have $300,000 in one bank, the FDIC covers $250,000 and you lose $50,000 if the bank fails. If you have $250,000 in Bank A and $250,000 in Bank B, both are fully covered because they are separate institutions. If you have a joint account with another person, each person's share is insured up to $250,000, so a joint account with $500,000 is fully covered ($250,000 per person).

FDIC insurance does not cover money in safe-deposit boxes, stocks, bonds, mutual funds, or cryptocurrency. It also does not cover money you are holding for someone else (unless it is a formal trust account). If you have questions about whether a specific deposit is covered, you can use the FDIC's Coverage Calculator on its website or call the bank directly.

Frequently Asked Questions

What happens if a bank fails?

The FDIC takes over the bank and either sells it to another bank or pays out deposits directly to customers. Deposits up to $250,000 per account holder are returned in full. The process usually takes a few days to a few weeks. Deposits over $250,000 may be recovered partially or not at all, depending on the bank's assets.

Can a bank take my money without permission?

A bank can freeze your account if it suspects fraud or if you owe money to the government (such as unpaid taxes or student loans). A bank can also deduct fees from your account according to the terms you agreed to when you opened the account. If you believe a freeze or deduction is wrong, contact the bank and ask for an explanation in writing.

Is my money safer in a bank or at home?

Money in a bank is safer because it is insured by the FDIC and protected by security systems. Money at home can be stolen, lost in a fire, or damaged. The only reason to keep cash at home is for when ready access in an emergency; for long-term storage, a bank account is the better choice.

Do all banks charge the same fees?

No. Fees vary widely between banks and even between branches of the same bank. Some banks charge no monthly maintenance fee; others charge $15 or more. Some banks reimburse out-of-network ATM fees; others do not. Comparing fee schedules before opening an account can save you hundreds of dollars per year.

Why does my bank offer such low interest rates?

Interest rates on savings accounts are set by the bank based on the federal funds rate and competition in your area. When the Federal Reserve keeps rates low, banks offer low rates on deposits. When the Federal Reserve raises rates, banks eventually raise deposit rates too. Banks in competitive markets offer higher rates because they need to attract deposits; banks with few competitors offer lower rates.