Banks earn money mainly by lending out the deposits you keep with them, and by charging fees for services

When you put money in a bank account, the bank does not lock it away in a vault with your name on it. Instead, the bank lends most of that money to other customers — for mortgages, car loans, business loans, and credit cards. The bank charges those borrowers interest (a percentage of what they borrowed), and keeps some of that interest as profit. The rest of the interest goes back to you as a small payment on your savings account, called interest earned or APY (annual percentage yield).

Banks also make money by charging you directly: monthly account fees, overdraft fees when you spend more than you have, ATM fees if you use another bank's machine, and fees for services like wire transfers or cashier's checks. Some banks charge nothing for basic checking and savings accounts, while others charge monthly fees that range widely depending on the bank and account type.

Understanding how banks profit helps explain why they offer some services free and charge for others, and why the interest rate they pay you on savings is usually very small.

Key Takeaways

  • Banks lend out most of your deposit to other customers and keep the difference between what they pay you in interest and what they charge borrowers.
  • Monthly account fees, overdraft charges, and service fees are direct ways banks make money from account holders.
  • The interest rate a bank pays you on savings is typically much lower than the rate it charges borrowers, which is where most of the bank's profit comes from.
  • Banks that offer no monthly fees usually make their money from lending and overdraft fees rather than account maintenance charges.
  • The amount of interest you earn depends on how much money you keep in the account and the bank's current interest rate, which changes over time.

How lending creates the biggest source of bank profit

A bank's main business is taking in deposits and lending that money out at a higher interest rate. If a bank pays you 0.01% interest on your savings account and lends that same money to a mortgage borrower at 6.5%, the bank keeps the difference — in this case, about 6.49%. Multiply that across thousands of accounts and millions of dollars, and that difference becomes substantial profit.

The bank does not lend out every dollar you deposit. Banking rules require banks to keep a certain amount in reserve (money they cannot lend), and they also set aside funds for customers who might withdraw their money. But the majority of deposits do get loaned out, which is why banks actively want your money — it is their raw material for making loans.

This is also why interest rates on savings accounts are so low. Banks can afford to pay you very little because they are earning much more by lending your money out. When the Federal Reserve raises interest rates (the rates banks charge each other to borrow), banks eventually raise the rates they pay savers too — but usually not by the same amount.

Monthly fees and service charges

Many banks charge a monthly maintenance fee just to keep an account open, though this fee is becoming less common. These fees typically range from $5 to $15 per month, though some banks waive the fee if you meet certain conditions — like keeping a minimum balance, setting up direct deposit, or maintaining a certain number of debit card transactions per month.

Beyond monthly fees, banks charge for specific services. An overdraft fee is charged when you spend more money than you have in your account — typically $25 to $35 per overdraft. ATM fees are charged when you withdraw cash from an ATM that does not belong to your bank's network, usually $2 to $3 per transaction. Wire transfer fees (for sending money electronically to another bank) and cashier's check fees (for official checks the bank writes on your behalf) also cost money, usually $15 to $30 each.

Some banks charge fees for closing an account early, for ordering checks, or for paper statements instead of electronic ones. Reading your bank's fee schedule before opening an account helps you understand what you might be charged for.

Why some banks charge less in fees

Online banks and some credit unions charge fewer or no monthly fees because they have lower operating costs than traditional brick-and-mortar banks. They do not maintain physical branches, which means they spend less on rent, utilities, and staff. They pass some of those savings to customers by waiving monthly fees.

However, these banks still make money from lending out deposits and from other sources like interchange fees (small payments from merchants when you use your debit card) and overdraft fees. A bank that advertises "no monthly fees" is not losing money — it is straightforward making profit from different sources than a bank that charges account maintenance fees.

Credit unions, which are member-owned rather than profit-driven, often charge the lowest fees and pay slightly higher interest on savings. But they also have stricter membership rules — you may need to live in a certain area, work for a specific employer, or belong to a particular organization to join.

Interest rates: what the bank pays you versus what it charges borrowers

The gap between what a bank pays savers and what it charges borrowers is called the spread, and it is where banks make most of their money. Right now, a typical savings account might pay 0.01% to 5% interest depending on the bank and account type, while a mortgage might cost a borrower 6% to 7%, and a credit card might charge 15% to 25%.

The spread is not fixed — it changes based on what the Federal Reserve does with interest rates, what the bank's costs are, and how much competition the bank faces. When many banks are competing for deposits, they raise the interest they pay savers to attract money. When fewer people are borrowing, banks may lower the rates they charge to attract borrowers. The spread adjusts to keep the bank profitable.

Your personal interest rate also depends on the type of account. A high-yield savings account pays much more interest than a regular savings account because the bank is trying to attract larger deposits. A money market account typically pays more than a savings account but less than a high-yield savings account, and it usually requires a higher minimum balance.

Other ways banks make money

Beyond lending and fees, banks earn money from several other sources. Interchange fees are small payments that merchants pay to the bank every time you swipe your debit card — typically 1% to 3% of the transaction. The merchant pays this fee, not you, but it is a source of bank revenue.

Banks also make money from investment services. Some banks offer investment accounts where they manage your money in stocks and bonds, and they charge a percentage of what you invest as a fee. They may also earn commissions when they sell you insurance products or refer you to a mortgage lender.

Large banks sometimes earn money from trading — buying and selling financial products like bonds and currencies for their own profit. This is less common at smaller community banks, which focus mainly on lending to local customers.

Why banks need to make profit

Banks are businesses, and like any business, they need to make profit to stay open, pay employees, maintain buildings and technology, and handle losses when borrowers do not repay loans. Some borrowers default on mortgages or credit cards, which means the bank loses money on those loans. Banks set their interest rates and fees high enough to cover those losses and still make a profit.

Banks also need profit to meet regulatory requirements. Banking regulators require banks to keep a certain amount of capital (money set aside) relative to the loans they make. This capital acts as a cushion if many borrowers default at once. Banks build this capital through profit.

Understanding that banks need to make money helps explain why you earn so little interest on savings while borrowers pay so much — the bank is balancing the needs of savers, borrowers, and its own survival.

Frequently Asked Questions

Why do I earn almost no interest on my savings account?

Banks pay low interest on savings because they can. They earn much more by lending your money out at higher rates, so they do not need to pay you much to keep your deposit. High-yield savings accounts pay more interest because banks use that higher rate to compete for deposits, but even those rates are much lower than what borrowers pay.

Do banks lose money when interest rates go up?

Not usually. When the Federal Reserve raises interest rates, banks eventually raise the rates they pay savers, but they also raise the rates they charge borrowers — and by a larger amount. This keeps the spread (the difference between what they pay and what they charge) profitable. Banks do face challenges when rates rise very quickly, because existing loans were made at lower rates.

Can a bank fail if too many people withdraw their money at once?

Yes, this is called a bank run. If most customers withdraw their deposits at the same time, the bank may not have enough cash on hand because most of the money is loaned out. This is why the government created deposit insurance — the FDIC insures deposits up to $250,000 per account, so customers do not lose money if a bank fails.

Why do some banks charge overdraft fees if I only go over by a dollar?

Banks charge overdraft fees because they are covering the cost of processing the transaction and the risk that you might not repay the overdraft. However, many banks now offer overdraft protection, which links your checking account to a savings account or credit line so that money transfers automatically if you overspend, avoiding the fee.

Do credit unions make money the same way banks do?

Credit unions use the same basic model — they take in deposits and lend them out — but they are owned by their members rather than shareholders. This means profit goes back to members through higher interest on savings and lower fees, rather than to outside investors. Credit unions still need to make enough money to operate and build reserves.