A routing number tells the banking system which bank holds your account
A routing number is a nine-digit code that identifies the specific bank or credit union where your account lives. When money moves into or out of your account—whether through direct deposit, a wire transfer, or an automatic bill payment—the routing number is how the sending bank knows where to send it. Without it, the payment system would not know which of thousands of banks to contact.
The routing number is not about your individual account. It is about the institution itself. Every branch of the same bank uses the same routing number. Your account number, by contrast, identifies you specifically within that bank. Together, the routing number and account number form the complete address for your money.
The Federal Reserve assigns routing numbers to all banks and credit unions that participate in the electronic payment system. The number is also called an ABA number, after the American Bankers Association, which originally managed the system.
Key Takeaways
- A routing number identifies your bank or credit union; your account number identifies you within that bank.
- You need both the routing number and account number for direct deposits, wire transfers, and automatic bill payments to work.
- Your routing number appears on the bottom left of your checks, and you can also find it on your bank's website or by calling customer service.
- Different routing numbers may exist for the same bank depending on the region or the type of transaction, so always confirm you have the correct one for your specific branch.
- Routing numbers are public information; sharing one does not put your account at risk the way sharing your account number or PIN would.
Where to find your routing number
The easiest place to find your routing number is on a check from your account. Look at the bottom left corner. The first nine digits are your routing number. The next set of digits is your account number. If you do not have checks, you have several other options.
Log into your bank's website or mobile app. Most banks display your routing number in the account details section, often labeled "Bank Information" or "Account Details." You can also call your bank's customer service line—the number is usually on the back of your debit card—and ask for your routing number. A representative can confirm it in under a minute.
Your bank's routing number is also public information. You can search for it online using your bank name and the phrase "routing number," or visit the Federal Reserve's routing number search tool. If you have multiple accounts at the same bank, they all share the same routing number.
Why different routing numbers exist for the same bank
Large banks often have more than one routing number. This happens because banks merge, because they operate in different regions, or because they process different types of transactions through different systems. Bank of America, for example, has multiple routing numbers depending on which state your account is in and whether you are sending a wire transfer or setting up direct deposit.
This is why it matters to use the correct routing number for the specific transaction you are making. If you are setting up direct deposit with your employer, use the routing number your bank specifies for direct deposits. If you are sending a wire transfer, confirm the wire transfer routing number. Using the wrong one can delay your payment or send it to the wrong place.
When in doubt, ask your bank which routing number to use for the specific transaction. Do not assume that all routing numbers for your bank are interchangeable.
What happens when you provide a routing number
When you give someone your routing number—your employer, a creditor, or a service provider—you are telling them which bank to contact. The routing number alone cannot be used to withdraw money or access your account. To actually move money, the sender also needs your account number, and even then, they can only move money in the direction you have authorized.
For direct deposit, your employer uses your routing number and account number to deposit your paycheck. For bill payments, your creditor uses both numbers to withdraw the amount you owe. For wire transfers, the sending bank uses your routing number to locate your bank, then your account number to deposit the funds into your specific account.
Sharing your routing number is safe. It is public information. What you should never share are your account number, PIN, passwords, or the full account details together with your name and address. A routing number by itself does not give anyone access to your money.
Routing numbers for wire transfers versus ACH transfers
Some banks maintain separate routing numbers for wire transfers and ACH transfers (the system used for direct deposits and bill payments). A wire transfer moves money faster—usually within hours—and goes through a different network than ACH, which typically takes one to three business days.
If you are sending a wire transfer, always ask your bank for the wire transfer routing number, not just "the" routing number. If you use an ACH routing number for a wire, the transfer may fail or be delayed. Conversely, using a wire routing number for direct deposit can cause the deposit to be rejected.
Your bank's website or customer service can tell you whether you need a different routing number for the type of transaction you are making. It takes one phone call to confirm.
International transfers and routing numbers
Routing numbers work only for transfers within the United States. If you are receiving money from outside the country or sending money abroad, you will need different information instead.
For incoming international transfers, you will need your bank's SWIFT code (also called a BIC code), which identifies your bank in the international payment system. You may also need an IBAN (International Bank Account Number) if the sending country uses that system, though most U.S. banks do not issue IBANs. Your bank can provide both of these codes.
For outgoing international transfers, you will need the receiving bank's SWIFT code and the recipient's account number in their country's format. Routing numbers do not cross borders.
What to do if you cannot find your routing number
If you have looked on your checks, your bank's website, and the Federal Reserve's search tool and still cannot find your routing number, call your bank directly. Have your account number ready—you can find it on a check, a statement, or your debit card. A customer service representative will confirm your routing number in seconds.
If you are trying to set up direct deposit or a wire transfer and your bank has given you a routing number that does not seem to work, contact your bank again before the important date. Do not guess or use a number you found online without confirming it with your bank first. A wrong routing number can cause a payment to fail or go to the wrong account.
Frequently Asked Questions
Can someone access my account with just my routing number?
No. A routing number identifies your bank, not your account. To move money, someone would also need your account number and your authorization. Sharing your routing number alone is safe.
Do I need a different routing number for each account I have?
No. All accounts at the same bank use the same routing number. Your account number is what distinguishes one account from another within that bank.
What if my bank gives me a routing number and it does not work?
Ask your bank whether you need a different routing number for the specific type of transaction—wire transfer, direct deposit, or ACH payment. Large banks sometimes have multiple routing numbers for different purposes or regions.
Can a routing number change?
Rarely. A routing number can change if your bank merges with another bank or restructures its operations, but this is uncommon. If your bank changes its routing number, they will notify you. For now, the routing number on your checks or in your bank's system is current.
Is my routing number the same at every branch of my bank?
Yes. All branches of the same bank share one routing number. The routing number identifies the bank as a whole, not a specific location.