A routing number is a nine-digit code that identifies which bank or credit union holds your account
Every U.S. bank and credit union has a routing number, also called a routing transit number or ABA number. When you send money to someone else's account—whether through a wire transfer, ACH payment, or direct deposit—the routing number tells the sending bank exactly which financial institution to send that money to. Without it, the transfer has no address.
The routing number is not secret. It appears on the bottom left of every check you write, and you can find it on your bank's website or by calling customer service. It is specific to your bank or credit union and the branch or processing center that handles your account, though many banks use the same routing number for all their branches nationwide.
Key Takeaways
- A routing number is a nine-digit code that identifies your specific bank or credit union in the U.S. financial system.
- You need your routing number and account number together to receive direct deposits, set up bill payments, or send wire transfers.
- The routing number appears on the bottom left corner of your checks and on your bank's website.
- Different banks have different routing numbers, but one bank may use the same routing number across multiple branches.
- Sharing your routing number is safe—it is public information and cannot be used to withdraw money without your account number.
Where to find your routing number
The easiest place to find your routing number is on a check. Look at the bottom left corner: the first nine digits are your routing number, followed by your account number, then the check number on the right.
If you do not have checks, log into your bank's website or mobile app. Most banks display the routing number in the account details or settings section. 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. They will give it to you immediately.
The Federal Reserve maintains a public database of routing numbers at frbservices.org. You can search by bank name and state to confirm a routing number if you are unsure.
How routing numbers work in transfers and deposits
When your employer sets up direct deposit, they ask for your routing number and account number. Your employer's payroll system uses the routing number to find your bank, then uses your account number to deposit your paycheck into the correct account within that bank.
The same process happens when you set up an automatic bill payment through your bank. You provide the routing number of the company or organization you are paying, and your bank uses it to send the payment to the right place. If you give the wrong routing number, the payment goes to the wrong bank—which can delay it by several days while the banks sort it out.
Wire transfers work the same way. You provide the recipient's routing number and account number, and the money moves from your bank to theirs. Wire transfers are faster than ACH payments (which take one to three business days) because they move through a different system, but both require the correct routing number to reach the right destination.
Routing numbers versus account numbers
A routing number identifies the bank. An account number identifies your specific account within that bank. You need both to complete most transfers. Think of it this way: the routing number is the address of the bank building, and the account number is your mailbox inside that building.
Your account number is usually 10 to 12 digits and appears on the bottom center of your checks, right after the routing number. It is also visible in your online banking portal. Unlike your routing number, your account number should be kept private—it is what someone would need along with your routing number to transfer money out of your account.
Why sharing your routing number is safe
Your routing number is public information. Banks print it on every check, post it on their websites, and list it in public databases. Sharing your routing number alone does not put your money at risk because no one can do anything with just that number.
To transfer money from your account, someone would need both your routing number and your account number. Even then, most banks require additional verification—a signature, a PIN, or confirmation through your online banking portal—before processing a transfer. Your routing number by itself is like giving someone your street address; they still need your house key to get inside.
You should share your routing number freely when setting up direct deposit, bill payments, or receiving wire transfers. You should never share your account number, PIN, or online banking password with anyone.
What happens if you use the wrong routing number
If you provide an incorrect routing number, the transfer usually does not go through immediately. The sending bank will try to deliver the money to the routing number you gave them. If that bank does not recognize the account number, the transfer bounces back to the sender, typically within one to three business days.
In some cases, the money may go to a different bank or account by mistake. If this happens, contact your bank right away with the date, amount, and recipient information. Your bank can file a trace to locate the funds and recover them. This process can take up to ten business days. To avoid this problem, always double-check the routing number before you submit a transfer, especially for large amounts.
Routing numbers for different types of transfers
Most banks use the same routing number for all types of transfers—direct deposit, bill payments, wire transfers, and ACH payments. However, some larger banks maintain separate routing numbers for different purposes or regions. If you are setting up a wire transfer, always ask your bank which routing number to use, because wire transfers sometimes require a different code than ACH transfers.
Credit unions also have routing numbers, and they work the same way as bank routing numbers. If you are receiving a payment from someone with a credit union account, ask them for their credit union's routing number, not their account number.
Frequently Asked Questions
Can someone steal money from my account if they have my routing number?
No. A routing number alone cannot be used to withdraw or transfer money. Someone would need both your routing number and your account number, plus they would typically need additional verification like a signature or PIN. Treat your routing number like your address—it is safe to share—but keep your account number private.
Do all banks in the same state use the same routing number?
No. Each bank or credit union has its own routing number, regardless of state. Some large banks may use the same routing number across all their branches nationwide, but different banks always have different routing numbers. You can look up a specific bank's routing number on their website or through the Federal Reserve database.
What if my bank merged with another bank—does my routing number change?
Usually not immediately. When banks merge, the smaller bank's routing number often continues to work for a transition period, sometimes for years. However, your bank will notify you if your routing number changes. Check your statements or contact your bank directly if you are unsure after a merger.
Is the routing number on my check the same as my bank's routing number?
Usually yes, but not always. Most checks display your bank's main routing number. However, some large banks print different routing numbers on checks depending on which processing center handles your account. If you are unsure, use the routing number from your bank's website or call customer service to confirm.
Do I need a routing number to receive money from someone?
Yes. Anyone sending you money—whether through direct deposit, a wire transfer, or an ACH payment—will need your routing number and account number. You should provide both pieces of information to anyone who needs to send you money. There is no risk in sharing your routing number this way.