A commercial bank is where most people keep their money and borrow when they need a loan
A commercial bank is a business that takes deposits from people like you, keeps that money safe, and lends it out to other customers and businesses. When you open a checking or savings account, you are banking at a commercial bank. The bank pays you a small amount of interest on savings, charges you fees for certain services, and makes its profit by lending your deposits to borrowers at a higher interest rate than it pays you.
The key word is "commercial" — these banks exist to make money, unlike credit unions (which are member-owned nonprofits) or investment banks (which trade securities rather than take deposits). A commercial bank is the everyday kind: Chase, Bank of America, Wells Fargo, your local community bank, or the bank your employer uses for payroll.
Commercial banks are regulated by federal and state authorities to make sure they stay solvent and do not take dangerous risks with customer deposits. The Federal Deposit Insurance Corporation, or FDIC, insures deposits up to a set amount per account holder per bank, so if the bank fails, you do not lose your money.
Key Takeaways
- Commercial banks take deposits, pay you interest on savings, and lend money to borrowers at a higher rate — that difference is how they profit.
- Your deposits are insured by the FDIC up to the legal limit, so a bank failure does not mean you lose your money.
- Commercial banks offer checking accounts, savings accounts, credit cards, mortgages, auto loans, and business loans all in one place.
- Banks charge fees for overdrafts, wire transfers, and other services, so comparing fee schedules between banks can save you money.
How a commercial bank makes money from your account
When you deposit money into a savings account, the bank does not lock it in a vault with your name on it. Instead, the bank uses your deposit to lend to other customers — a mortgage borrower, a small business, a person buying a car. The borrower pays the bank interest on that loan. The bank then pays you a smaller amount of interest on your savings, and keeps the difference as profit.
For example, if your savings account earns 0.5% interest and the bank lends that same money to a mortgage borrower at 6%, the bank keeps roughly 5.5% as its margin. That spread is the core of commercial banking. The bank is betting that enough borrowers will repay their loans so that the interest income covers the interest it owes depositors, plus operating costs and profit.
Checking accounts usually earn no interest at all, so the bank's profit comes from fees instead — overdraft fees when you spend more than your balance, monthly maintenance fees, wire transfer fees, and fees for stopping a check. Some banks waive these fees if you maintain a minimum balance or set up direct deposit.
What services a commercial bank provides
A commercial bank is a one-stop shop for most financial needs. You can open a checking account for daily spending, a savings account to set money aside, and a money market account (a hybrid that pays higher interest but limits withdrawals). You can explore for a credit card, take out a personal loan, finance a car, or get a mortgage to buy a home — all from the same bank.
Banks also offer services beyond lending and deposits. You can wire money to another person or business, set up automatic bill payments, rent a safe deposit box to store documents or valuables, and get a cashier's check (a check the bank itself guarantees). Some banks offer investment services like brokerage accounts or financial planning, though these are often separate divisions with different rules.
The advantage of using one bank for multiple services is convenience — one login, one customer service line, one relationship. The disadvantage is that you may not get the best rate on each product. A credit union might offer a better savings rate, an online bank might charge lower fees, and a mortgage specialist might undercut the bank's home loan rate.
The difference between commercial banks and other financial institutions
A credit union looks similar to a bank — it takes deposits, pays interest, and makes loans — but it is owned by its members rather than shareholders. Credit unions are nonprofits, so they often charge lower fees and pay higher interest on savings. The trade-off is that membership is usually restricted (you might have to work for a certain employer or live in a certain area) and they have fewer branches and ATMs.
An investment bank does not take deposits or offer checking accounts. Instead, it buys and sells stocks, bonds, and other securities on behalf of wealthy clients and large corporations. It also advises on mergers and acquisitions. Investment banks are separate from commercial banks by law (a rule called the Glass-Steagall Act, though parts have been repealed), though some large financial companies own both divisions.
An online bank is a commercial bank without physical branches — you do everything by website or app. Online banks typically charge lower fees and pay higher interest because they have no building costs. The downside is that you cannot walk in and speak to someone in person, and you may have fewer ways to deposit cash.
How the FDIC protects your money
The Federal Deposit Insurance Corporation is a government agency that insures deposits at member banks. If a bank fails, the FDIC pays depositors back up to the insured limit. As of now, that limit is $250,000 per depositor per bank per account category.
This means if you have $100,000 in a checking account and $100,000 in a savings account at the same bank, both are fully insured because they are different account categories. But if you have $300,000 in one savings account, only $250,000 is insured — the extra $50,000 is at risk if the bank fails. If you want to insure more than $250,000, you can open accounts at different banks or use different account categories (joint accounts, retirement accounts, and trust accounts each have their own $250,000 limit).
FDIC insurance is automatic — you do not have to sign up or pay a fee. Any bank that displays the FDIC logo is a member. Credit unions have similar insurance through the National Credit Union Administration, or NCUA, with the same $250,000 limit.
Fees and how to avoid them
Commercial banks charge fees for services that cost them money to provide or to cover risk. An overdraft fee (typically $25 to $35) is charged when you spend more than your balance — the bank is lending you money briefly and charging for that service. A wire transfer fee ($15 to $50) covers the cost of moving money electronically. A monthly maintenance fee ($5 to $15) is charged straightforward for keeping the account open, though many banks waive it if you maintain a minimum balance or set up direct deposit.
The best way to avoid fees is to compare banks before opening an account. Look at the fee schedule on the bank's website or ask a representative. Ask specifically about overdraft fees, monthly maintenance fees, ATM fees (especially out-of-network ATM fees), and wire transfer fees. Some banks offer free checking with no minimum balance and no monthly fee — these exist, and they are worth finding.
You can also reduce fees by using the bank's own ATMs (out-of-network ATM fees add up quickly), setting up direct deposit (many banks waive fees if your paycheck goes directly in), and keeping a minimum balance if the bank offers that trade-off. Some banks let you opt out of overdraft protection, which means a transaction will be declined rather than charged a fee — ask whether that option is available.
How to choose a commercial bank
Start by deciding what you need. If you want to speak to someone in person, you need a bank with branches near your home or work. If you prefer to bank online and do not mind waiting a few days for deposits to clear, an online bank may save you money. If you want a relationship with a local institution, a community bank may feel more personal than a national chain.
Next, compare the accounts and fees. Look at the interest rate on savings accounts (higher is better), the monthly maintenance fee (lower is better), overdraft fees, and ATM access. Check whether the bank offers the services you think you will need — a credit card, a mortgage, a business account — and whether those services are competitively priced. Read recent customer reviews, but remember that people tend to review when they are angry, so take extreme complaints with some skepticism.
Finally, confirm that the bank is FDIC-insured. You can search the FDIC's bank database online to verify. Once you have narrowed your choices, open an account with the bank that offers the best combination of low fees, good interest rates, and convenient access.
Frequently Asked Questions
Is my money safe in a commercial bank?
Yes, as long as the bank is FDIC-insured and your balance is under the $250,000 limit per account category. The FDIC guarantees that if the bank fails, you will be paid back in full. You can verify FDIC insurance by searching the bank's name in the FDIC's bank database on their website.
Why do banks charge overdraft fees if I only go over by a few dollars?
An overdraft fee covers the cost and risk to the bank of lending you money briefly. The bank could decline the transaction instead, but many customers prefer to have the transaction go through and pay the fee. You can usually opt out of overdraft protection so transactions are declined rather than charged a fee — ask your bank.
Can I get my money out of a commercial bank anytime I want?
Yes, for checking and savings accounts. You can withdraw cash at an ATM or teller window during business hours. The only exception is if you have a money market account, which may limit the number of withdrawals per month, or a certificate of deposit (CD), which charges a penalty if you withdraw before the term ends.
What happens to my account if the bank gets bought by another bank?
Your account transfers to the new bank automatically. Your balance, interest rate, and FDIC insurance all carry over. You may see changes to fees or services after the merger, so read any notices the new bank sends you.
Do I need to use the same bank for checking and savings?
No. You can have a checking account at one bank and a savings account at another. Some people do this to get the best rate on savings at one bank and the best checking features at another. Just remember that each bank's FDIC insurance is separate, so you can insure up to $250,000 at each institution.