A routing number is a nine-digit code that identifies which bank or credit union holds your account
Every bank and credit union in the United States has its own routing number. When you send money to someone else's account—whether through direct deposit, a wire transfer, or an automatic payment—that routing number tells the financial system exactly which institution to send the money to. Without it, the payment would have nowhere to go.
The routing number is different from your account number. Your account number identifies your specific account at that bank. The routing number identifies the bank itself. Together, they form the complete address for your money.
Routing numbers are also called ABA numbers, after the American Bankers Association, which created the system in 1910. You will see the term used interchangeably.
Key Takeaways
- A routing number is a nine-digit code unique to each bank or credit union, used to direct payments to the correct financial institution.
- Your routing number stays the same for every account you hold at that bank, but different branches of the same bank may have different routing numbers.
- You need your routing number and account number together to receive direct deposits, set up automatic bill payments, and send wire transfers.
- You can find your routing number on the bottom left of your checks, on your bank's website, or by calling your bank directly.
Where to find your routing number
The easiest place to look is the bottom left corner of any check you have from that account. The first nine digits printed there are your routing number. The next set of digits is your account number.
If you do not have checks, log into your bank's website or mobile app. Most banks display your routing number in the account details or settings section. You may need to click through to a page labeled "Account Information" or "Routing and Account Numbers."
You can also call your bank's customer service line and ask for your routing number. Have your account number or the phone number associated with your account ready when you call.
Why you need it for refunds and payments
When the IRS sends you a tax refund by direct deposit, it uses your routing number and account number to deposit the money into your bank account instead of mailing a check. The same applies to state tax refunds, stimulus payments, and unemployment benefits.
If you are setting up automatic bill payments—for a mortgage, utilities, or insurance—you will provide your routing number and account number to the company collecting the payment. This tells their system which bank to pull the money from on the scheduled date.
When you receive a wire transfer from another person or organization, they need your routing number to send it to the correct bank. Without it, the money could end up at the wrong institution entirely.
Routing numbers are not the same across all branches
Many people assume that every branch of the same bank uses the same routing number. That is often true, but not always. Some large banks assign different routing numbers to different regions or branches.
If you opened your account at a specific branch location, that branch may have its own routing number. If you move or switch to a different branch of the same bank, your routing number might change. Always verify your routing number with your current bank rather than assuming it is the same as an old account.
Credit unions are more likely to have a single routing number for the entire institution, regardless of branch location, but you should still confirm with your credit union directly.
What happens if you use the wrong routing number
If you provide an incorrect routing number when setting up a direct deposit or wire transfer, the payment will go to the wrong bank. The money does not disappear—it ends up in someone else's account at a different institution.
The sending organization (the IRS, your employer, or a wire service) will eventually notice the error and attempt to recover the funds. This process can take weeks or months. In the meantime, you will not have access to your money, and the receiving bank may freeze the account where it landed.
Always double-check your routing number before confirming a payment, especially for large transfers like tax refunds or wire transfers. Verify it against your checks, your bank's website, or a direct call to your bank.
Routing numbers for online banks and credit unions
Online banks and credit unions operate the same way as traditional banks—they have routing numbers and use them for the same purposes. The difference is that you cannot walk into a physical branch, so you must find your routing number online or by phone.
Log into your online bank's website or app and look for account details or settings. Most online banks display routing and account numbers prominently in the account information section. If you cannot find it, call the customer service number on your bank's website.
Credit unions often provide routing information on their website under a section labeled "Routing Number" or "Wire Transfer Information." If your credit union does not list it online, call the main branch or visit in person.
Routing numbers and security
Your routing number is public information—it is printed on every check you write and is not secret. Sharing your routing number alone does not put your account at risk. However, you should never share your routing number along with your account number to someone you do not trust.
Legitimate organizations—your employer, the IRS, your bank, your insurance company—will ask for both your routing number and account number when they need to deposit money into your account. Scammers sometimes ask for this information under false pretenses. If someone calls or emails asking for these details, verify that they are who they claim to be by calling the organization directly using a phone number from their official website.
Frequently Asked Questions
Can I use the same routing number for multiple accounts at the same bank?
Yes, if both accounts are at the same branch or within the same bank system. However, if you opened accounts at different branches or the bank uses regional routing numbers, they may be different. Contact your bank to confirm the routing number for each account.
What if my bank merged with another bank?
Your routing number may change after a merger. The acquiring bank will notify you and provide your new routing number. Update any automatic payments or direct deposit arrangements with your new routing number to avoid payment failures.
Do I need a routing number to receive a check?
No. A routing number is only needed for electronic transfers—direct deposits, wire transfers, and automatic payments. If someone is mailing you a physical check, they do not need your routing number.
Is my routing number different if I have a savings account and a checking account?
No. Both accounts at the same bank use the same routing number. The routing number identifies the bank; your account number identifies which specific account within that bank receives the money.
What should I do if I think someone used my routing number fraudulently?
Contact your bank immediately and explain what happened. Your bank can review recent transactions, freeze your account if needed, and help you dispute unauthorized transfers. Keep a record of when you noticed the problem and what transactions look suspicious.