A routing number is a nine-digit code that tells the banking system which bank holds your account
Every bank in the United States has a routing number, also called an ABA routing number or routing transit number. When you send money to someone else's account — whether through direct deposit, a wire transfer, or an ACH payment — the routing number directs that money to the correct bank. Without it, the payment system would not know where to send the funds.
The routing number is not the same as your account number. Your account number identifies your specific account within that bank. Together, the routing number and account number tell the banking system exactly where your money should go.
Routing numbers are public information. You can share yours without security risk, the same way you would share a mailing address. The real protection for your account comes from your account number and your login credentials, which you should never share.
Key Takeaways
- A routing number is a nine-digit code specific to your bank, not to your individual account.
- You can find your routing number on the bottom left of your checks, on your bank's website, or by calling your bank directly.
- Different branches of the same bank may have different routing numbers, so always confirm you have the right one for your specific branch.
- Routing numbers are public and safe to share; they are required for direct deposits, wire transfers, and ACH payments.
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 the routing number in the account details or settings section. Some banks label it "routing number," others call it "ABA number" or "transit number" — they mean the same thing.
You can also call your bank's customer service line and ask for your routing number. Have your account number ready when you call. If you bank at a large national bank, the routing number may be the same across all branches, but regional banks and credit unions often have different routing numbers by location, so confirm you have the one for your specific branch.
Why you need it for refunds and payments
When a government agency, employer, or business sends you money — whether a tax refund, stimulus payment, insurance payout, or paycheck — they need your routing number and account number to deposit it directly into your bank account. This is called direct deposit.
You also need your routing number when you set up automatic bill payments, transfer money between your own accounts at different banks, or send money to someone else through your bank's online system. Any time money moves electronically from one bank to another, the routing number is what guides it to the right place.
For tax refunds specifically, the IRS uses your routing number and account number to deposit your refund directly. If you provide the wrong routing number, your refund will go to the wrong bank and you will have to contact both your bank and the IRS to recover it — a process that can take weeks.
How routing numbers are organized
The Federal Reserve assigns routing numbers to banks, and each number follows a specific format. The first four digits identify the bank itself. The next four digits identify the specific branch or region. The final digit is a check digit that the banking system uses to verify the number is correct.
Large national banks like Bank of America, Wells Fargo, and Chase often have one routing number that works across all their branches nationwide. Smaller regional banks, community banks, and credit unions typically have different routing numbers for different locations. This is why it matters to confirm you have the routing number for your specific branch, not just your bank.
You can look up any routing number on the Federal Reserve's website or through third-party routing number databases. These tools let you enter a routing number and see which bank it belongs to, or search by bank name and location to find the routing number you need.
What happens if you use the wrong routing number
If you provide an incorrect routing number when setting up direct deposit for a refund or payment, the money will be sent to a different bank. That bank will either reject the deposit and send it back to the sender, or it may go into an account at that bank that does not belong to you.
If your refund goes to the wrong bank, contact the sender immediately — whether that is the IRS, your employer, or an insurance company. They can stop the deposit if it has not yet processed, or they can help you trace where the money went. The process usually takes one to three weeks, and you may need to provide documentation of the error.
To avoid this, double-check your routing number before you submit it. Write it down from your check or your bank's website, then verify it a second time before you enter it into any form. Many banks also let you test a direct deposit with a small amount first, which can catch errors before your full refund is sent.
Routing numbers for online banks and credit unions
Online banks like Ally, Charles Schwab, and Marcus have routing numbers just like traditional banks. You can find yours by logging into your account online or calling customer service. Online banks typically have one routing number nationwide, since they do not have physical branches.
Credit unions also have routing numbers, and they work the same way as bank routing numbers. Your credit union's routing number is usually available on their website, on your checks, or through their mobile app. If you are a member of multiple credit unions, each one has its own routing number.
Some credit unions participate in shared branching networks, which means you can do basic banking at other credit unions' branches. However, this does not change your routing number — it stays the same regardless of which branch you visit.
Routing numbers and account numbers are not the same
A routing number identifies your bank. An account number identifies your specific account within that bank. You need both pieces of information for direct deposit and electronic transfers.
Your routing number is the same for everyone at your bank (or at your specific branch, depending on the bank's structure). Your account number is unique to you. If you share your routing number with someone, they cannot access your account — they would also need your account number, and even then they would need your login credentials to actually move money.
When you write a check, both numbers appear at the bottom: the routing number on the left, your account number in the middle, and the check number on the right. This is the standard format used across all U.S. banks.
Frequently Asked Questions
Is it safe to give someone my routing number?
Yes. A routing number is public information and does not give anyone access to your account. You need both your routing number and account number, plus your login credentials, for someone to move money from your account. Sharing your routing number alone is no different from sharing your mailing address.
Do all branches of the same bank have the same routing number?
Not always. Large national banks usually have one routing number for all branches, but regional banks and credit unions often have different routing numbers by location. Check your specific branch's routing number rather than assuming all branches are the same.
What if I cannot find my routing number?
Call your bank's customer service line with your account number ready. They will give you the routing number for your specific branch. You can also look it up on the Federal Reserve's website or through a routing number database if you know your bank name and location.
Can a routing number change?
Routing numbers rarely change, but it can happen if your bank merges with another bank or restructures its branches. If your bank changes its routing number, they will notify you by mail or through your online account. Always confirm the routing number before submitting it for direct deposit.
Do I need a different routing number for wire transfers?
No. The same routing number works for wire transfers, ACH payments, direct deposits, and other electronic transfers. Some banks may ask for additional information like a SWIFT code for international wire transfers, but your domestic routing number stays the same.