What banks actually do with your money

A bank is a business that takes your money on deposit, lends it to other people and businesses, and keeps some of the difference as profit. When you put money in a checking or savings account, the bank doesn't lock it in a vault with your name on it. Instead, they use that money to make loans — mortgages, car loans, business loans — and pay you a small amount of interest in return for letting them use it. The bank makes money when the interest they charge borrowers is higher than the interest they pay depositors.

Your deposits are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account type at each bank. This means if the bank fails, the government guarantees you'll get your money back up to that limit. This protection is automatic — you don't have to do anything to activate it, and it costs you nothing.

Banks also make money by charging fees: monthly account maintenance, overdraft fees, ATM fees, wire transfer fees, and fees for stopping a check. Some banks charge nothing if you meet certain conditions, like keeping a minimum balance or setting up direct deposit. Understanding these fee structures before you open an account can save you hundreds of dollars a year.

Key Takeaways

  • Banks lend out the money you deposit and pay you interest in return, which is how they make profit and how you earn money on savings.
  • The FDIC insures deposits up to $250,000 per account type at each bank, protecting your money if the bank fails.
  • Different account types — checking, savings, money market, certificates of deposit — serve different purposes and earn different interest rates.
  • Banks charge fees for services like overdrafts, ATM use, and wire transfers, but many banks waive these if you meet their conditions.
  • Interest rates on savings accounts and CDs change based on what the Federal Reserve does, so shopping around matters when rates shift.

Checking accounts versus savings accounts

A checking account is designed for money you spend regularly. You get a debit card and checks to access your funds, and there are usually no limits on how many times you can withdraw or transfer money. The tradeoff is that checking accounts earn little to no interest on your balance. Some banks offer "high-yield" checking accounts that pay more interest, but these usually require a high minimum balance or direct deposit.

A savings account is meant to hold money you're not spending right away. Banks pay you interest on the balance, but they limit how many times per month you can withdraw or transfer money without a penalty — typically six times. The interest rate is higher than checking because the bank knows the money will stay there longer. Online banks often pay significantly more interest on savings accounts than brick-and-mortar banks because they have lower overhead costs.

Most people benefit from having both: a checking account for bills and everyday spending, and a savings account for an emergency fund or money toward a goal. Some banks let you link them so you can transfer money between them instantly when you need to.

How interest rates work and why they change

When a bank pays you interest on a savings account, they're giving you a percentage of your balance each month or year. A 4% annual interest rate means that if you have $1,000 in the account and leave it untouched for a year, you'll earn $40. The actual amount depends on how often the bank compounds the interest — daily, monthly, or annually — so read the fine print.

Interest rates on savings accounts and certificates of deposit (CDs) move up and down based on what the Federal Reserve does. The Federal Reserve is the central bank of the United States, and it sets a target range for the interest rate that banks charge each other for overnight loans. When the Fed raises its rate, banks eventually raise the rates they pay on savings accounts and CDs. When the Fed lowers its rate, savings rates fall too. This usually happens over weeks or months, not overnight.

This is why shopping around for the best savings rate makes sense, especially when rates are changing. A bank offering 4.5% today might offer 3.5% in six months if the Fed cuts rates. Moving your money to a higher-paying account takes minutes online and can earn you hundreds of dollars more per year on the same balance.

Certificates of deposit and money market accounts

A certificate of deposit (CD) is an account where you agree to leave your money untouched for a set period — usually three months, six months, one year, or five years. In exchange, the bank pays you a higher interest rate than a regular savings account. If you withdraw the money before the term ends, you pay a penalty, usually a few months' worth of interest. CDs are useful if you know you won't need the money for a specific amount of time and want a may provide return.

A money market account is a hybrid between checking and savings. It pays interest like a savings account but gives you limited check-writing ability and a debit card like a checking account. Money market accounts usually require a higher minimum balance than savings accounts, and they limit withdrawals the same way savings accounts do. They pay more interest than checking but typically less than CDs.

Both CDs and money market accounts are FDIC-insured, so your money is protected up to $250,000. The choice between them depends on whether you need access to your money. If you're saving for something specific and won't need the cash for a known period, a CD locks in a rate and removes the temptation to spend. If you want flexibility but better returns than a regular savings account, a money market account works better.

Debit cards, credit cards, and how they differ

A debit card is connected to your checking account and draws money directly from your balance when you use it. You can only spend what you have. There's no debt, no interest charges, and no credit history built. Debit cards offer some fraud protection — if someone uses your card without permission, you can dispute the charge — but the protection is weaker than credit cards, and you may be liable for some unauthorized charges if you don't report them quickly.

A credit card is a loan. When you use it, you're borrowing money from the credit card company. You get a bill each month and can pay it in full or make a minimum payment. If you don't pay the full balance, the credit card company charges you interest, usually 15% to 25% annually. Credit cards build your credit history, which affects your ability to borrow money for a house or car later. They also offer stronger fraud protection than debit cards.

Banks issue both debit and credit cards, but they work differently. Debit cards are safer for budgeting because you can't spend money you don't have. Credit cards are useful for building credit and for large purchases where you want fraud protection, but they're dangerous if you carry a balance because the interest adds up quickly.

Overdrafts, fees, and how to avoid them

An overdraft happens when you try to spend more money than you have in your checking account. Some banks automatically cover the overdraft and charge you a fee — usually $25 to $35 per overdraft. Other banks decline the transaction and charge a smaller fee or no fee at all. A few banks offer "overdraft protection," which links your checking account to a savings account or credit line, and they automatically transfer money to cover the shortfall.

Overdraft fees are one of the biggest ways banks make money from customers, and they hit hardest on people with low balances. If you overdraft multiple times in a week, you can rack up hundreds of dollars in fees. You can opt out of overdraft coverage at most banks, which means transactions will simply be declined instead of charging you a fee. This protects you from surprise charges, though it can be embarrassing at the checkout.

Other common fees include ATM fees if you use an out-of-network machine, monthly maintenance fees if you don't meet minimum balance requirements, wire transfer fees, and fees for stopping a check. Many banks waive these fees if you set up direct deposit, keep a minimum balance, or maintain a certain account type. Reading the fee schedule before opening an account and asking about waivers can save you money.

How to choose a bank and what to look for

Start by deciding whether you want a traditional bank with physical branches or an online bank. Traditional banks let you deposit cash and talk to someone in person, but they usually pay lower interest rates and charge more fees. Online banks pay higher interest rates and charge fewer fees, but you can't walk in with cash, and customer service is by phone or chat.

Compare these specifics: the interest rate on savings accounts and CDs, monthly maintenance fees and what waives them, overdraft fees, ATM fees and whether the bank is part of a fee-free ATM network, and customer service availability. Don't choose based on a sign-up bonus alone — a $200 bonus doesn't matter if you'll pay $15 a month in fees.

Check whether the bank is FDIC-insured by searching the FDIC's bank database online. If you have more than $250,000, you can spread it across multiple banks to keep everything insured. Once you've narrowed your choices, open an account online or in person. You'll need a government ID, proof of address, and your Social Security number. Most banks let you start using your account within minutes.

Frequently Asked Questions

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

The FDIC takes over and pays you back up to $250,000 per account type at that bank. This is automatic — you don't have to do anything. If you have more than $250,000, the amount over that limit may not be covered, which is why some people spread large amounts across multiple banks.

Can I lose money in a savings account?

No, as long as the bank is FDIC-insured. Your balance won't go down unless you withdraw money. The interest rate might be very low, but you won't lose principal. Investments like stocks and bonds are different — those can lose value.

Why do online banks pay more interest than regular banks?

Online banks don't have the cost of running physical branches, so they pass some of that savings to customers through higher interest rates. They also compete heavily on rates because they can't offer the convenience of walking into a location.

What's the difference between a bank and a credit union?

A credit union is a nonprofit owned by its members, while a bank is a for-profit business. Credit unions often charge fewer fees and pay better rates, but they may have stricter membership requirements and fewer ATMs. Both are insured by the FDIC or NCUA (National Credit Union Administration) up to $250,000.

Do I need to keep a minimum balance in my checking account?

It depends on the bank and account type. Some checking accounts have no minimum, while others require $500 or $1,000 to avoid a monthly fee. Online banks typically have no minimum. Check the account details before opening.