The largest banks in America, by total assets
The biggest banks in the US are JPMorgan Chase, Bank of America, Wells Fargo, and Citigroup. These four hold more assets than most other banks combined. JPMorgan Chase is the largest by a significant margin — it has roughly twice the assets of the fifth-largest bank. The size ranking shifts slightly year to year as banks merge or grow, but these four have held the top positions for over a decade.
Size matters because it affects what services a bank offers and how stable it is. The largest banks operate thousands of branches across the country, offer investment services alongside checking accounts, and have the resources to weather economic downturns. But size also means complexity — a giant bank's customer service can feel impersonal, and their fee structures are often harder to navigate than smaller banks.
Key Takeaways
- JPMorgan Chase, Bank of America, Wells Fargo, and Citigroup are the four largest US banks by total assets.
- The "Big Four" banks operate nationwide branch networks and offer checking, savings, investment, and lending services under one roof.
- Smaller regional banks and credit unions often charge lower fees and offer more personalized service, even if they have fewer locations.
- A bank's size does not determine whether it is safe — all banks that take deposits are insured by the FDIC up to $250,000 per account.
What the Big Four banks actually do
JPMorgan Chase, Bank of America, Wells Fargo, and Citigroup are universal banks — they do retail banking (checking and savings accounts for individuals), commercial banking (loans and services for businesses), and investment banking (managing stock offerings and mergers for large companies). This means you can walk into a branch to open a checking account, and the same institution handles billions in corporate transactions.
Each of the Big Four has thousands of branches and ATMs. JPMorgan Chase has roughly 4,800 branches; Bank of America has about 4,300; Wells Fargo has around 4,600; Citigroup has fewer US branches but operates globally. If you live in or near a city, you have probably seen at least one of their branch signs.
These banks also own smaller brands you may recognize. Bank of America owns Merrill Lynch (investment services). JPMorgan Chase owns Chase Bank (the consumer-facing brand most people use). Wells Fargo operates under its own name. Citigroup owns Citi and operates Citi-branded accounts. When you open an account at "Chase," you are actually opening it at JPMorgan Chase.
Why banks this large exist
The Big Four are so large partly because of mergers that happened decades ago and were allowed by regulators. JPMorgan Chase grew by absorbing Washington Mutual (2008) and Bear Stearns (2008). Bank of America acquired Merrill Lynch (2008) and FleetBoston (2004). Wells Fargo merged with Wachovia (2008). These consolidations happened during crises, when regulators prioritized stability over competition.
Size creates economies of scale — a bank with millions of customers can spread the cost of technology, compliance, and physical branches across more people, making each account cheaper to run. But it also creates risk. When a bank this large fails, the damage spreads throughout the entire financial system, which is why regulators watch them closely and why the government stepped in to stabilize them during the 2008 financial crisis.
How the Big Four compare to other banks
After the Big Four, the next tier includes banks like U.S. Bancorp, Truist Financial, PNC Financial Services, and Goldman Sachs. These are still large — they have hundreds of branches and billions in assets — but they operate in fewer states or focus more on specific services like investment banking or commercial lending.
Below that tier are thousands of regional and community banks, plus credit unions. A regional bank might operate in five or six states. A community bank might serve a single county. Credit unions are member-owned cooperatives rather than shareholder-owned corporations. These smaller institutions often charge lower fees, offer better interest rates on savings accounts, and provide more personalized service — but they have fewer branches and may not offer investment services.
What "too big to fail" means
The Big Four are sometimes called "too big to fail" banks. This phrase means that if one of them collapsed, the damage would be so severe — affecting millions of depositors, thousands of businesses, and the broader economy — that the government would likely intervene to prevent the collapse. During the 2008 financial crisis, the government did exactly that, providing emergency loans and guarantees to keep the largest banks operating.
This creates a moral hazard: if a bank knows the government will rescue it in a crisis, it may take bigger risks than it otherwise would. Regulators try to prevent this by requiring the Big Four to hold more capital (cash reserves) than smaller banks, undergo regular stress tests (simulations of economic downturns), and maintain detailed plans for how they would wind down if they failed.
FDIC insurance protects your money regardless of bank size
The size of your bank does not affect whether your deposits are safe. All banks that take deposits — whether they are JPMorgan Chase or a small community bank — must be insured by the FDIC (Federal Deposit Insurance Corporation). The FDIC guarantees that if a bank fails, you will get your money back up to $250,000 per account type at that bank.
This means your checking account at a big bank is just as protected as your checking account at a small bank. The FDIC insurance limit applies per depositor, per bank, per account type. If you have $200,000 in a checking account and $100,000 in a savings account at the same bank, both are fully covered. If you have $300,000 in a checking account at the same bank, only $250,000 is covered.
When you might choose a smaller bank instead
Many people choose smaller banks or credit unions even though the Big Four are more convenient. Reasons include lower fees on checking accounts, higher interest rates on savings accounts, more flexible lending standards for mortgages or small business loans, and the ability to speak with a loan officer who knows your situation.
The trade-off is fewer branches and ATMs. If you travel frequently or move often, the Big Four's nationwide presence is valuable. If you stay in one area, a local bank or credit union may serve you better. Some people use both — a big bank for convenience and a credit union for savings or borrowing.
Frequently Asked Questions
Is my money safer at a big bank than a small one?
No. All banks insured by the FDIC protect your deposits up to $250,000 per account type, regardless of size. A small community bank's deposits are just as protected as JPMorgan Chase's. The size of the bank does not affect FDIC coverage.
Why do the Big Four charge higher fees than smaller banks?
They do not always. Some big banks offer free checking with no minimum balance, while some small banks charge monthly fees. The difference depends on the specific account and bank, not on size alone. Compare the actual fees and features of accounts you are considering rather than assuming big banks are more expensive.
Can I move my account from a big bank to a smaller one?
Yes. You can open an account at a new bank and ask them to help transfer your direct deposits and automatic payments. The process usually takes a few days. You can keep your old account open while the transfer happens, then close it once everything is moved.
What happens if one of the Big Four banks fails?
Your deposits up to $250,000 are protected by FDIC insurance. The FDIC would either arrange for another bank to take over the failed bank's deposits, or it would pay you directly. This has not happened to any of the Big Four since the FDIC was created in 1933, though the government did provide emergency support during the 2008 crisis.
Do I need to use one of the Big Four banks?
No. Thousands of smaller banks and credit unions offer checking, savings, and lending services. Your choice should depend on what matters to you — branch locations, fees, interest rates, customer service, or specific services like investment accounts. The biggest bank is not always the best choice for your situation.