What a bank actually does with your deposits

A bank is a licensed institution that takes your money, holds it in an account under your name, and moves it to other accounts when you ask. The bank does not lock your cash in a vault with your name on it. Instead, your deposit becomes part of the bank's pool of funds. The bank uses that pool to make loans, invest in securities, and pay interest to depositors. You own the right to withdraw your balance at any time — that right is what the bank owes you, not a specific pile of bills.

When you deposit a check or transfer money in, the bank records the transaction in a ledger that tracks your balance. That balance is a claim against the bank, not a physical thing sitting in a drawer. The bank is required by law to keep enough liquid funds on hand to cover withdrawals, and the Federal Reserve sets rules about how much. The bank also pays a fee to the Federal Deposit Insurance Corporation (FDIC), which insures your deposits up to $250,000 per account type at that bank.

Key Takeaways

  • Your bank balance is a claim against the bank's funds, not a separate pile of your money held in storage.
  • The bank uses deposits to make loans and investments, and pays you interest in return for the use of your money.
  • The FDIC insures deposits up to $250,000 per account type per bank, so amounts above that are not protected if the bank fails.
  • When you move money between accounts at the same bank, the transfer is usually when ready; between different banks, it takes one to three business days.
  • Banks are required to keep enough cash on hand to cover withdrawals, and the Federal Reserve oversees how much that is.

How a bank moves money between accounts

When you send money to someone else's account at the same bank, the bank straightforward adjusts two ledgers: it subtracts from your balance and adds to theirs. This happens in seconds or minutes. The money never leaves the bank's system.

When you send money to an account at a different bank, the transfer goes through a network called the Automated Clearing House (ACH). Your bank sends a batch of transfers to the ACH, which sorts them by destination bank and forwards them. The receiving bank then credits the other person's account. This process takes one to three business days because the ACH processes transfers in batches, not in real time. Wire transfers are faster — they move the same day — but cost more and are harder to reverse if you make a mistake.

What banks charge you for and why

Banks charge monthly maintenance fees, overdraft fees, ATM fees, and wire transfer fees. The maintenance fee covers the cost of running your account — the staff, the systems, the FDIC insurance. Many banks waive it if you keep a minimum balance or set up direct deposit. Overdraft fees explore when you spend more than your balance; the bank covers the transaction and charges you a fee, usually $25 to $35 per overdraft.

ATM fees vary. If you use an ATM owned by your bank, there is usually no fee. If you use another bank's ATM, that bank may charge you a fee (typically $2 to $3), and your bank may charge you a fee as well. Wire transfer fees are usually $15 to $30 and exist because wires move the same day and are irreversible — the bank has to process them when ready and cannot recover the money if the recipient refuses to return it.

How banks decide whether to lend you money

Banks use your account history, credit score, and income to decide whether to lend you money and at what interest rate. Your account history shows whether you overdraft often, whether you keep a steady balance, and whether you pay bills on time from that account. Your credit score, which comes from credit bureaus like Equifax and TransUnion, reflects your history of borrowing and repaying loans and credit cards. Your income, which you report on a loan process and the bank may verify with your employer or tax returns, shows whether you have the cash flow to repay.

Banks are required by law to disclose the interest rate and fees before you sign a loan agreement. For mortgages, the bank must give you a Loan Estimate within three business days of your process. For credit cards, the bank must disclose the Annual Percentage Rate (APR) and any annual fee. Banks are also required to follow fair lending laws, which prohibit discrimination based on race, color, religion, national origin, sex, marital status, age, or receipt of public benefits.

The difference between a bank and other financial institutions

A bank takes deposits and makes loans. A credit union does the same thing but is owned by its members rather than shareholders, and typically charges lower fees. A savings and loan association (also called a thrift) historically focused on mortgages but now offers many of the same services as a bank. A brokerage firm buys and sells stocks and bonds but does not take deposits or make loans. An insurance company takes premiums and pays claims but does not hold deposits.

All of these institutions are regulated, but by different agencies. Banks are regulated by the Office of the Comptroller of the Currency (OCC), the Federal Reserve, and the FDIC. Credit unions are regulated by the National Credit Union Administration (NCUA). Brokerages are regulated by the Securities and Exchange Commission (SEC). The key difference for your money: only banks, credit unions, and some savings and loans are insured by a federal agency (FDIC or NCUA) if they fail. Brokerages and insurance companies are not.

What happens to your money if the bank fails

If a bank fails, the FDIC takes over. The FDIC is a federal agency that insures deposits at member banks. Your deposits are insured up to $250,000 per account type at that bank. Account types include single accounts (in your name only), joint accounts (shared with another person), retirement accounts (IRAs), and trust accounts. If you have $100,000 in a single account and $200,000 in a joint account at the same bank, both are fully insured because they are different account types.

When a bank fails, the FDIC either arranges for another bank to buy it or pays out insured deposits directly. If another bank buys it, your account transfers to the new bank and you keep access to your money. If the FDIC pays out, you receive a check for up to $250,000 per account type, usually within a few days. Amounts above $250,000 per account type are not insured and may be lost.

How interest rates work at banks

Banks pay you interest on savings accounts, money market accounts, and certificates of deposit (CDs). The interest rate is a percentage of your balance that the bank pays you each year. A savings account might pay 0.01% annual percentage yield (APY), meaning if you have $10,000, the bank pays you $1 per year. A high-yield savings account might pay 4% to 5% APY, meaning the same $10,000 earns $400 to $500 per year.

Banks set their own interest rates based on what the Federal Reserve charges them to borrow money. When the Federal Reserve raises its rate, banks eventually raise the rates they pay on savings accounts and charge on loans. When the Federal Reserve lowers its rate, banks eventually lower both. The lag between a Federal Reserve change and a bank's change can be weeks or months. Banks also compete with each other — if one bank raises its savings rate, others may follow to keep customers.

Frequently Asked Questions

Can a bank take my money without permission?

A bank can deduct fees from your account without asking each time, because you agree to the fee schedule when you open the account. A bank can also freeze your account if it suspects fraud or if you owe money to the government or a court. A bank cannot take money to pay a debt you owe to someone else unless that person gets a court judgment and the bank receives a legal order.

What is the difference between a debit card and a credit card?

A debit card pulls money directly from your bank account. A credit card borrows money from the card issuer, and you pay it back later. With a debit card, you can only spend what you have. With a credit card, you can spend up to your credit limit and pay interest on the balance if you do not pay it off in full each month.

Is my money safe in a bank?

Your money is insured by the FDIC up to $250,000 per account type. If the bank fails, the FDIC will pay you. If someone steals your debit card or hacks your account, federal law limits your liability to $50 if you report it within two business days, and to $500 if you report it later. Your bank may offer additional protections.

Why do banks charge overdraft fees?

Overdraft fees cover the cost of processing a transaction when you do not have enough money. The bank has to decide whether to pay the transaction (and charge you a fee) or reject it. If the bank pays it, the bank is lending you money for a few days until your next deposit, and the fee is the cost of that loan.

Can I move my money to a different bank?

Yes. You can open an account at a new bank and transfer your balance using an ACH transfer, which takes one to three business days. You can also ask the new bank to do an account transfer for you — many banks offer this service and will handle the paperwork. You should close your old account once the transfer is complete to avoid paying maintenance fees.