The largest U.S. banks by total assets

The Big Four banks — JPMorgan Chase, Bank of America, Wells Fargo, and Citigroup — hold more than a third of all U.S. bank deposits. JPMorgan Chase is the largest by assets, holding over $3.7 trillion as of 2024. Bank of America follows with roughly $3.4 trillion, Wells Fargo with about $1.9 trillion, and Citigroup with approximately $2.4 trillion. These four institutions dominate consumer banking, credit cards, mortgages, and investment services across the country.

Beyond the Big Four, U.S. Bancorp, PNC Financial Services, Goldman Sachs, Morgan Stanley, and American Express round out the top ten by total assets. The rankings shift slightly year to year based on acquisitions, market conditions, and how each bank reports its holdings, but these nine institutions consistently occupy the largest positions in American banking.

Size matters because it affects the services available to you, the fees you pay, and the stability of your deposits. Larger banks typically offer more branches, more online tools, and more product options. They also fall under stricter federal oversight, which means your deposits are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account holder per bank.

Key Takeaways

  • JPMorgan Chase is the largest U.S. bank by assets, followed by Bank of America, Citigroup, and Wells Fargo.
  • The Big Four banks control over one-third of all U.S. bank deposits and offer the widest range of services nationwide.
  • All major U.S. banks are FDIC-insured, meaning your deposits up to $250,000 per account are protected by federal insurance.
  • Larger banks offer more branches and digital tools but may charge higher fees than smaller regional or community banks.
  • Bank rankings by assets change over time due to mergers, market performance, and accounting methods.

What the Big Four banks do

JPMorgan Chase operates over 4,700 branches and serves roughly 80 million customers. It offers checking and savings accounts, mortgages, auto loans, credit cards, investment services, and wealth management. The bank also runs a large commercial and investment banking division that serves businesses and institutional clients worldwide.

Bank of America maintains about 4,300 branches and serves over 66 million customers. Its consumer services include deposit accounts, credit cards, home loans, and personal loans. Bank of America also operates a substantial investment banking and wealth management business, particularly through its Merrill Lynch subsidiary.

Wells Fargo has roughly 4,000 branches and serves approximately 70 million customers. The bank offers standard consumer banking products — checking, savings, mortgages, auto loans, and credit cards — plus commercial banking and investment services. Wells Fargo has faced significant regulatory scrutiny in recent years over sales practices and account management issues.

Citigroup operates fewer U.S. branches than the other three but maintains a global presence. It serves consumers through deposit accounts, credit cards, and mortgages, while also running major institutional banking, investment banking, and wealth management divisions that operate internationally.

How to find the right bank for your situation

The largest banks are not always the best choice for every person. Big banks offer convenience through branch networks and digital tools, but they often charge higher fees for overdrafts, minimum balances, and out-of-network ATM use. Customer service can be harder to reach, and decisions about your account may take longer.

If you want personalized service and lower fees, a regional bank or credit union may serve you better. Regional banks like U.S. Bancorp and PNC Financial Services operate in specific geographic areas and often offer more competitive rates on savings accounts and CDs. Credit unions are member-owned and typically charge fewer fees, though they have fewer branches and may require membership in a specific group or community.

Consider what matters most to you: branch availability, online banking features, customer service responsiveness, fee structure, or interest rates on savings. Write down your priorities, then compare what each type of bank offers. You can maintain accounts at more than one bank — many people keep a checking account at a large bank for convenience and a savings account at a credit union for better rates.

FDIC insurance and deposit protection

All major U.S. banks, including the Big Four, are FDIC-insured. This means the Federal Deposit Insurance Corporation guarantees your deposits up to $250,000 per depositor per bank. If the bank fails, the FDIC pays you back — you do not lose your money.

The $250,000 limit applies per account category. If you have a checking account and a savings account at the same bank, each is insured separately up to $250,000. If you have a joint account with another person, that account is insured separately as well. Money market accounts and CDs are also covered under FDIC insurance.

Investment accounts, brokerage accounts, and mutual funds held at a bank are not covered by FDIC insurance — they fall under different protections through the Securities Investor Protection Corporation (SIPC). Ask your bank which accounts are FDIC-insured and which are not, especially if you hold more than $250,000 at one institution.

How bank size affects fees and interest rates

Larger banks typically charge more in fees because they have higher operating costs and less incentive to compete aggressively on price. A checking account at JPMorgan Chase or Bank of America may charge $12 to $15 per month if you do not maintain a minimum balance, while a credit union checking account often costs nothing. Overdraft fees at major banks range from $25 to $35 per transaction, compared to $15 to $25 at smaller institutions.

Interest rates on savings accounts and money market accounts follow the opposite pattern. Larger banks typically offer lower rates — sometimes 0.01% APY on a basic savings account — because they attract deposits through convenience rather than competitive returns. Online banks and credit unions often pay 4% to 5% APY on savings accounts because they have lower overhead and must compete on rate.

If you keep a large balance and rarely overdraft, a major bank's convenience may outweigh the fee cost. If you have a smaller balance or limited income, the fees can add up quickly. Calculate your actual costs by multiplying the monthly fee by 12 and comparing it to what you would earn in interest elsewhere.

Mergers and consolidation in U.S. banking

The Big Four banks are the result of decades of mergers and consolidation. JPMorgan Chase was formed through the merger of JPMorgan and Chase Manhattan in 2000, then acquired Washington Mutual in 2008 during the financial crisis. Bank of America acquired Merrill Lynch in 2009 and has absorbed dozens of smaller banks over the years. Wells Fargo and Citigroup have similar histories of growth through acquisition.

This consolidation means fewer independent banks exist today than in the past. In 1985, there were roughly 14,000 banks in the United States; by 2024, that number had fallen to around 4,000. Most of the decline comes from mergers and failures, not new bank formation. The result is that a handful of very large institutions now control most of the banking system.

Regulators monitor this concentration because it affects competition and financial stability. If one of the Big Four banks fails, the impact would ripple through the entire economy. This is why the largest banks face stricter capital requirements, stress tests, and oversight than smaller institutions.

Frequently Asked Questions

Is my money safe at a big bank?

Yes. All major U.S. banks are FDIC-insured, meaning deposits up to $250,000 per account category are may provide by the federal government. If the bank fails, you get your money back. The larger the bank, the more scrutiny it receives from regulators, which actually makes failure less likely.

Do I have to use one of the Big Four banks?

No. Thousands of regional banks, community banks, and credit unions operate across the United States. Many offer better rates, lower fees, and more personalized service. The Big Four are convenient because of their branch networks and digital tools, but they are not required for banking.

What is the difference between a bank and a credit union?

Banks are for-profit institutions owned by shareholders; credit unions are nonprofit organizations owned by their members. Credit unions typically charge lower fees and pay higher interest rates on savings, but they have fewer branches and may require membership in a specific group or community.

Can I move my account from a big bank to a smaller bank?

Yes. You can open an account at a new bank and transfer your direct deposits and automatic payments. Most banks have a process to help you move accounts. You can keep your old account open for a period while you transition, or close it once everything has moved over.

Why do the Big Four banks charge so many fees?

Large banks have higher operating costs because they maintain thousands of branches, employ tens of thousands of people, and invest heavily in technology. They also have less incentive to compete on fees because customers often choose them for convenience rather than price. Smaller banks and credit unions compete more aggressively on fees and rates because they must attract customers through better terms.